WO2008084991A1 - Fuel reducing apparatus for vehicle - Google Patents

Fuel reducing apparatus for vehicle Download PDF

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Publication number
WO2008084991A1
WO2008084991A1 PCT/KR2008/000144 KR2008000144W WO2008084991A1 WO 2008084991 A1 WO2008084991 A1 WO 2008084991A1 KR 2008000144 W KR2008000144 W KR 2008000144W WO 2008084991 A1 WO2008084991 A1 WO 2008084991A1
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WO
WIPO (PCT)
Prior art keywords
voltage
output
input
output voltage
alternator
Prior art date
Application number
PCT/KR2008/000144
Other languages
French (fr)
Inventor
Jong-Dae Hur
Original Assignee
Kim, Jae-Won
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kim, Jae-Won filed Critical Kim, Jae-Won
Publication of WO2008084991A1 publication Critical patent/WO2008084991A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • H02J7/1469—Regulation of the charging current or voltage otherwise than by variation of field
    • H02J7/1492—Regulation of the charging current or voltage otherwise than by variation of field by means of controlling devices between the generator output and the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/48—Arrangements for obtaining a constant output value at varying speed of the generator, e.g. on vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/46—The network being an on-board power network, i.e. within a vehicle for ICE-powered road vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

Definitions

  • the present invention relates to a fuel reducing apparatus for a vehicle, and more particularly, to a fuel reducing apparatus for a vehicle, which is connected to an input terminal of an alternator of the vehicle and outputs a stabilized voltage to an output terminal of the alternator to supply the stabilized voltage to components of the vehicle, thereby improving the combustion efficiency of an engine.
  • an alternator of a vehicle outputs a voltage in the range of 9V to 13.5V, which is not stabilized.
  • This output voltage of the alternator is used as power of a battery and an electronics control unit (ECU) for controlling and monitoring the vehicle and as power for driving various units of the vehicle, such as an air conditioner, a headlight, a rear light, an audio device and a heater.
  • ECU electronics control unit
  • the present invention has been made to solve the above-mentioned problems occurring in the conventional art, and a primary object of the present invention is to provide a fuel reducing apparatus for a vehicle, which stabilizes a voltage generated from an alternator and supplies the stabilized voltage to an ECU and a battery of the vehicle to thereby improve the combustion efficiency of an engine, provide a stabilized power to various devices and extend the lifespan of the various devices.
  • a fuel reducing apparatus for a vehicle comprises: a first comparator for comparing an unstable input voltage Vl applied thereto through an output line of an alternator relay, which is switched to supply power to an input terminal of an alternator when an ignition switch for starting a vehicle engine is turned on, with a first reference voltage Vref_l and outputting a positive potential when the input voltage Vl is higher than the first reference voltage Vref_l; a switch adapted to be turned on when the positive potential is output through an output port of the first comparator; a chopper circuit for boosting an output voltage V2 and outputting the boosted output voltage to an input line of the alternator when the switch is turned on; a second comparator for comparing the output voltage V2 of the chopper circuit with a second reference voltage Vref_2; a frequency controller for receiving a signal corresponding to the comparison result of the second comparator and controlling the output voltage V2 of the chopper circuit such that the output voltage V2 has a uniform level; a filter for removing a noise component
  • the fuel reducing apparatus for a vehicle according to the present invention is directly connected to the input terminal of the alternator of the vehicle to outputs a uniform output voltage to the alternator such that the alternator outputs a stable voltage through its output terminal. Accordingly, the stable voltage is supplied to an ECU and a battery to thereby improve the combustion efficiency of an engine. Furthermore, a stable voltage is supplied to various devices of the vehicle to expand the lifespan of various devices.
  • FIG. 1 illustrates a circuit configuration of a fuel reduction apparatus for a vehicle according to the present invention
  • FIG. 2 is a wiring diagram of the fuel reducing apparatus for a vehicle according to the present invention.
  • FIG. 3 is a table representing a mileage test result of the fuel reducing apparatus for a vehicle according to the present invention. Best Mode for Carrying Out the Invention
  • the fuel reducing apparatus 100 for a vehicle according to the present invention is connected to an input terminal of an alternator 20 of the vehicle.
  • the alternator 20 operates in connection of a vertical movement of a piston, which is performed when fuel burns due to a stroke according to inhalation, compression, explosion and exhaustion of a vehicle engine 10.
  • the vehicle includes an ignition switch 30 for starting the engine 10, an alternator relay 50 switched to supply power to the input terminal 20a of the alternator 20 when a start motor 40 and the ignition switch 30 are started, a battery 60 that supplies driving power of the ignition switch 30 and is supplied with power from an output terminal 20b of the alternator 20 and charged with the power when the engine 10 is started, an ECU 70 for controlling various devices of the vehicle, an oxygen sensor 80 operated by an oxygen sensor controller 190 receiving a filter output voltage V3 obtained by filtering an input voltage Vl through a filter to supply oxygen and preventing imperfect combustion occurring at an initial starting stage so as to induce fuel reduction, and an ignition coil 90 operated by an ignition coil plunger output voltage V4, which is output from an ignition coil plunger 200 when the input voltage Vl is input to the ignition coil plunger 200, or operated by the ignition coil plunger output voltage V4 which substitutes the filter output voltage V3 output after the input voltage Vl is cut according to a voltage boosted from the input voltage Vl when the filter output voltage V3 output from the filter 180 is input
  • the fuel reducing apparatus 100 for a vehicle is electrically connected to the input terminal of the alternator 20 and the output terminal of the alternator relay 50. That is, an input terminal 100a of the fuel reducing apparatus 100 for a vehicle is connected to the output terminal of the alternator relay 50 and an output terminal 100b of the fuel reducing apparatus for a vehicle is connected to the input terminal of the alternator 20.
  • the fuel reducing apparatus 100 for a vehicle outputs the unstable input voltage Vl in the range of 9V to 13.5V, which is applied to the output terminal of the alternator relay 50 as an output voltage V2 of 14.5V and provides the output voltage V2 to the input terminal of the alternator 20. Accordingly, the output voltage of the alternator 20, which is induced by a voltage supplied to a rotor (not shown) and a stator (not shown), corresponds to 14.5V irrespective of load. This uniform voltage is supplied to the battery 60, the ECU 70 and a load.
  • the input terminal 100a of the fuel reducing apparatus 100 for a vehicle is electrically connected to an output line 21 of the alternator relay 50 and the output terminal 100b of the fuel reducing apparatus 100 is electrically connected to an input line 21 of the alternator 20 to output a uniform voltage.
  • a first input port 110a of an operational amplifier constituting a first comparator 110 receives the input voltage Vl and a second input port 110b of the operational amplifier receives a first reference voltage Vref_l of 9 V from a first reference voltage supply unit 120.
  • a positive potential is generated at an output port 110c of the operational amplifier when the input voltage Vl is higher than the first reference voltage Vref_l and a negative potential is generated at the output port 110c of the operational amplifier when the input voltage Vl is lower than the first reference voltage Vref_l.
  • the output potential of the output port of the first comparator 110 is input as a switching signal to the switch 130.
  • the switch 130 can be configured in the form of a transistor, for example.
  • the switch 130 is turned on when the potential of the output terminal 110c of the first comparator 110, that is, the switching signal, is positive and turned off when the output potential is negative.
  • the switch 130 is turned off when the input voltage Vl is lower than 9 V.
  • the input voltage Vl which is input to the alternator relay 50 and passes through the switch 130 is output as the output voltage V2 boosted to a predetermined level through a chopper circuit 140.
  • the output voltage V2 output from an output terminal of the chopper circuit 140 is applied to an input port 150a of an operational amplifier constituting a second comparator 150, and a second reference voltage Vref_2 corresponding to 14.5V is supplied to a second input port 150b of the operational amplifier constituting the second comparator 150 from a second reference voltage supply unit 160.
  • the second comparator 150 compares the second reference voltage Vref_2 with the second output voltage V2 output from the chopper circuit 40, a positive potential is generated at an output port 150c of the operational amplifier constituting the second comparator 150 when the second output voltage V2 is higher than the second reference voltage Vref_2, and a negative potential is generated at the output port 150c of the operational amplifier when the second output voltage V2 is lower than the second reference voltage Vref_2.
  • the output voltage of the output port 150c of the second comparator 150 is applied to a frequency controller 170 and converted to a predetermined frequency value to control the chopper circuit 140 such that the chopper circuit 140 maintains the output voltage V2 of 14.5V.
  • the frequency controller 170 using pulse width modulation (PWM).
  • PWM pulse width modulation
  • the output voltage of the output port 150c of the second comparator 150 may include a noise component
  • the output voltage passes through the filter 180 composed of a resistor R and a capacitor C to be output as a stabilized voltage of 14.5V.
  • the oxygen sensor control voltage V5 output from the oxygen sensor controller 190 is continuously output to the oxygen sensor 80 for one minute according to an internal timer to supply oxygen, and thus imperfect combustion generated at the initial starting stage is prevented to induce fuel reduction.
  • the oxygen sensor 80 is operated by the oxygen sensor control voltage V5 output from the oxygen sensor controller 190 for one minute and then stopped until the next ignition.
  • the ignition coil plunger 200 passes the input voltage Vl and outputs the input voltage Vl as the ignition coil plunger output voltage V4 to the ignition coil 90.
  • the fuel reducing apparatus 100 for a vehicle according to the present invention is connected to the input terminal of the alternator 20 and the input voltage Vl in the range of 9 to 13.5V is input to the fuel reducing apparatus 100 from the output terminal of the alternator relay 50.
  • the input voltage Vl in the range of 9 to 13.5V is varied according to load (for example, a head light, a tail light, various window motors and an air conditioner).
  • the first comparator 110 compares the input voltage Vl input through the alternator relay 50 with the first reference voltage Vref_l provided by the first reference voltage supply unit 120 and the switch 130 is turned on when the input voltage Vl is higher than the first reference voltage Vref_l corresponding to 9 V to apply the input voltage Vl to the chopper circuit 140.
  • the input voltage Vl higher than or equal to 9 V input to the chopper circuit 140 is output as the output voltage V2 corresponding to 14.5V.
  • the second comparator 150 compares the output voltage V2 with the second reference voltage Vref_2 supplied from the second reference voltage supply unit 160. A positive potential is generated at the output port of the second comparator 150 when the output voltage V2 is higher than the second reference voltage Vref_2 and a negative potential is generated at the output port of the second comparator 150 when the output voltage V2 is lower than the second reference voltage Vref_2.
  • the signal of the output port of the second comparator 150 is input to the frequency controller 170.
  • the frequency controller 170 outputs a frequency for controlling the chopper circuit
  • Noise such as a ripple component is removed from the output voltage V2 output from the chopper circuit 140 while the output voltage V2 passes through the filter 180 and the output voltage V2 is input to the input terminal of the alternator 20, and thus the alternator 20 outputs a more stable voltage to the load.
  • a voltage drop caused by the operation of an air conditioner or a heater leads to a voltage drop at the output terminal of the alternator relay 50.
  • the first comparator 110 compares the input voltage Vl with a reference voltage and controls the switch 130 to output the input voltage Vl.
  • the input voltage Vl output from the switch 130 is boosted while passing through the chopper circuit 140.
  • the output voltage V2 of the chopper circuit 140 is compared with a reference voltage by the second comparator 150 and, when the output voltage V2 is lower than 14.5V, boosted again, and thus the output voltage V2 is stabilized.
  • a noise component is removed from the output voltage V2 output from the chopper circuit 140 while the output voltage V2 passes through the filter 180, and the output voltage V2 is output as the noise-free filter output voltage V3.
  • Vl is applied to the filter 180 is applied to the oxygen sensor controller 190, the oxygen sensor control voltage V5 is continuously output to the oxygen sensor 80 for one minute from the oxygen sensor controller to supply oxygen. This prevents imperfect combustion occurring at the initial ignition stage to induce fuel reduction.
  • the oxygen sensor 80 is driven by the oxygen sensor control voltage V5 output from the oxygen sensor controller 190 for one minute, and then stopped until the next ignition.
  • the ignition coil plunger 200 When the input voltage Vl is input to the ignition coil plunger 200, the ignition coil plunger 200 directly passes the input voltage Vl and outputs the input voltage Vl as the ignition coil plunger output voltage V4 to the ignition coil 90.
  • the filter output voltage V3 output from the filter 180 When the filter output voltage V3 output from the filter 180 is input to the ignition coil plunger 200, a voltage boosted from the input voltage Vl cuts off the input voltage Vl, and then the filter output voltage V3 is substituted by the ignition coil plunger output voltage V4 and output. Accordingly, a more stabilized output is maintained to prevent a voltage variation according to load and promote stable and uniform ignition so as to induce perfect combustion.
  • the present invention supplies oxygen and a stabilized voltage while maintaining the output voltage of the alternator 20 as 14.5V to improve mileage by at least 20%.
  • the fuel reducing apparatus for a vehicle is directly connected to the input terminal of the alternator of the vehicle to outputs a uniform output voltage to the alternator such that the alternator outputs a stable voltage through its output terminal. Accordingly, the stable voltage is supplied to an ECU and a battery to thereby improve the combustion efficiency of an engine. Furthermore, a stable voltage is supplied to various devices of the vehicle to expand the lifespan of various devices.

Abstract

The present invention relates to a fuel reducing apparatus for a vehicle, which is connected to an input terminal of an alternator of the vehicle and outputs a stabilized voltage to an output terminal of the alternator to supply the stabilized voltage to components of the vehicle, thereby improving the combustion efficiency of an engine. The fuel reducing apparatus for a vehicle comprises a first comparator for comparing an unstable input voltage Vl applied thereto through an output line of an alternator relay, which is switched to supply power to an input terminal of an alternator, with a first reference voltage Vref_l and outputting a positive potential when the input voltage Vl is higher than the first reference voltage Vref_l, a switch adapted to be turned on when the positive potential is output through an output port of the first comparator, a chopper circuit for boosting an output voltage V2 and outputting the boosted output voltage to an input line of the alternator when the switch is turned on, a second comparator for comparing the output voltage V2 of the chopper circuit 140 with a second reference voltage Vref_2, and a frequency controller for receiving a signal corresponding to the comparison result of the second comparator and controlling the output voltage V2 of the chopper circuit such that the output voltage V2 has a uniform level.

Description

Description
FUEL REDUCING APPARATUS FOR VEHICLE
Technical Field
[1] The present invention relates to a fuel reducing apparatus for a vehicle, and more particularly, to a fuel reducing apparatus for a vehicle, which is connected to an input terminal of an alternator of the vehicle and outputs a stabilized voltage to an output terminal of the alternator to supply the stabilized voltage to components of the vehicle, thereby improving the combustion efficiency of an engine. Background Art
[2] In general, an alternator of a vehicle outputs a voltage in the range of 9V to 13.5V, which is not stabilized. This output voltage of the alternator is used as power of a battery and an electronics control unit (ECU) for controlling and monitoring the vehicle and as power for driving various units of the vehicle, such as an air conditioner, a headlight, a rear light, an audio device and a heater.
[3] However, when a driver drives more than one devices of a vehicle together through his or her manipulation, the power of an engine of the vehicle becomes unstable and the output voltage of an alternator driven by the power of the engine also becomes unstable to thereby result in an increase in fuel consumption. Furthermore, the unstable output voltage reduces the expected lifespan of various units of the vehicle. Disclosure of Invention Technical Problem
[4] Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the conventional art, and a primary object of the present invention is to provide a fuel reducing apparatus for a vehicle, which stabilizes a voltage generated from an alternator and supplies the stabilized voltage to an ECU and a battery of the vehicle to thereby improve the combustion efficiency of an engine, provide a stabilized power to various devices and extend the lifespan of the various devices. Technical Solution
[5] A fuel reducing apparatus for a vehicle comprises: a first comparator for comparing an unstable input voltage Vl applied thereto through an output line of an alternator relay, which is switched to supply power to an input terminal of an alternator when an ignition switch for starting a vehicle engine is turned on, with a first reference voltage Vref_l and outputting a positive potential when the input voltage Vl is higher than the first reference voltage Vref_l; a switch adapted to be turned on when the positive potential is output through an output port of the first comparator; a chopper circuit for boosting an output voltage V2 and outputting the boosted output voltage to an input line of the alternator when the switch is turned on; a second comparator for comparing the output voltage V2 of the chopper circuit with a second reference voltage Vref_2; a frequency controller for receiving a signal corresponding to the comparison result of the second comparator and controlling the output voltage V2 of the chopper circuit such that the output voltage V2 has a uniform level; a filter for removing a noise component of the output voltage V2 output from the chopper circuit and outputting a filter output voltage V3; an oxygen sensor controller for continuously outputting an oxygen sensor control voltage V5 for one minute according to an internal timer when the filter output voltage V3, which is obtained when the input voltage Vl passes through the filter, is applied thereto, and then stopping the output of the oxygen sensor output voltage V5 until the next ignition; and an ignition coil plunger for directly passing the input voltage Vl when the input voltage Vl is applied thereto, outputting the input voltage Vl as an ignition coil plunger output voltage V4, cuts off the input voltage Vl according to a voltage boosted from the input voltage Vl when the filter output voltage V3 output from the filter is applied thereto, and then outputting the ignition coil plunger output voltage V4 in stead of the filter output voltage V3.
Advantageous Effects
[6] The fuel reducing apparatus for a vehicle according to the present invention is directly connected to the input terminal of the alternator of the vehicle to outputs a uniform output voltage to the alternator such that the alternator outputs a stable voltage through its output terminal. Accordingly, the stable voltage is supplied to an ECU and a battery to thereby improve the combustion efficiency of an engine. Furthermore, a stable voltage is supplied to various devices of the vehicle to expand the lifespan of various devices. Brief Description of the Drawings
[7] Further objects and advantages of the invention can be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
[8] FIG. 1 illustrates a circuit configuration of a fuel reduction apparatus for a vehicle according to the present invention;
[9] FIG. 2 is a wiring diagram of the fuel reducing apparatus for a vehicle according to the present invention; and
[10] FIG. 3 is a table representing a mileage test result of the fuel reducing apparatus for a vehicle according to the present invention. Best Mode for Carrying Out the Invention
[11] A fuel reducing apparatus for a vehicle according to preferred embodiments of the present invention will be described in detail with reference to the attached drawings.
[12] Referring to FIGS. 1 and 2, the fuel reducing apparatus 100 for a vehicle according to the present invention is connected to an input terminal of an alternator 20 of the vehicle. The alternator 20 operates in connection of a vertical movement of a piston, which is performed when fuel burns due to a stroke according to inhalation, compression, explosion and exhaustion of a vehicle engine 10.
[13] The vehicle includes an ignition switch 30 for starting the engine 10, an alternator relay 50 switched to supply power to the input terminal 20a of the alternator 20 when a start motor 40 and the ignition switch 30 are started, a battery 60 that supplies driving power of the ignition switch 30 and is supplied with power from an output terminal 20b of the alternator 20 and charged with the power when the engine 10 is started, an ECU 70 for controlling various devices of the vehicle, an oxygen sensor 80 operated by an oxygen sensor controller 190 receiving a filter output voltage V3 obtained by filtering an input voltage Vl through a filter to supply oxygen and preventing imperfect combustion occurring at an initial starting stage so as to induce fuel reduction, and an ignition coil 90 operated by an ignition coil plunger output voltage V4, which is output from an ignition coil plunger 200 when the input voltage Vl is input to the ignition coil plunger 200, or operated by the ignition coil plunger output voltage V4 which substitutes the filter output voltage V3 output after the input voltage Vl is cut according to a voltage boosted from the input voltage Vl when the filter output voltage V3 output from the filter 180 is input to the ignition coil plunger 200 to maintain a stabilized voltage and prevent a voltage variation according to load, to thereby promote stable and uniform ignition and induce perfect combustion.
[14] Accordingly, the fuel reducing apparatus 100 for a vehicle according to the present invention is electrically connected to the input terminal of the alternator 20 and the output terminal of the alternator relay 50. That is, an input terminal 100a of the fuel reducing apparatus 100 for a vehicle is connected to the output terminal of the alternator relay 50 and an output terminal 100b of the fuel reducing apparatus for a vehicle is connected to the input terminal of the alternator 20.
[15] The fuel reducing apparatus 100 for a vehicle according to the present invention outputs the unstable input voltage Vl in the range of 9V to 13.5V, which is applied to the output terminal of the alternator relay 50 as an output voltage V2 of 14.5V and provides the output voltage V2 to the input terminal of the alternator 20. Accordingly, the output voltage of the alternator 20, which is induced by a voltage supplied to a rotor (not shown) and a stator (not shown), corresponds to 14.5V irrespective of load. This uniform voltage is supplied to the battery 60, the ECU 70 and a load.
[16] More specifically, the input terminal 100a of the fuel reducing apparatus 100 for a vehicle is electrically connected to an output line 21 of the alternator relay 50 and the output terminal 100b of the fuel reducing apparatus 100 is electrically connected to an input line 21 of the alternator 20 to output a uniform voltage.
[17] When the unstable input voltage Vl in the range of 9V to 13.5V is input to the fuel reducing apparatus 100 for a vehicle according to the present invention through the output line 51 of the alternator relay 50, a first input port 110a of an operational amplifier constituting a first comparator 110 receives the input voltage Vl and a second input port 110b of the operational amplifier receives a first reference voltage Vref_l of 9 V from a first reference voltage supply unit 120.
[18] Here, a positive potential is generated at an output port 110c of the operational amplifier when the input voltage Vl is higher than the first reference voltage Vref_l and a negative potential is generated at the output port 110c of the operational amplifier when the input voltage Vl is lower than the first reference voltage Vref_l.
[19] The output potential of the output port of the first comparator 110 is input as a switching signal to the switch 130.
[20] The switch 130 can be configured in the form of a transistor, for example. The switch 130 is turned on when the potential of the output terminal 110c of the first comparator 110, that is, the switching signal, is positive and turned off when the output potential is negative.
[21] That is, the switch 130 is turned on when the input voltage Vl output from the relay
50 and input to the input port 110a is higher than the first reference voltage Vref_l according to the comparison result of the first comparator 110, that is, when the input voltage Vl is higher than 9 V, and outputs an output voltage for driving the alternator 20. The switch 130 is turned off when the input voltage Vl is lower than 9 V.
[22] The input voltage Vl which is input to the alternator relay 50 and passes through the switch 130 is output as the output voltage V2 boosted to a predetermined level through a chopper circuit 140.
[23] The output voltage V2 output from an output terminal of the chopper circuit 140 is applied to an input port 150a of an operational amplifier constituting a second comparator 150, and a second reference voltage Vref_2 corresponding to 14.5V is supplied to a second input port 150b of the operational amplifier constituting the second comparator 150 from a second reference voltage supply unit 160.
[24] The second comparator 150 compares the second reference voltage Vref_2 with the second output voltage V2 output from the chopper circuit 40, a positive potential is generated at an output port 150c of the operational amplifier constituting the second comparator 150 when the second output voltage V2 is higher than the second reference voltage Vref_2, and a negative potential is generated at the output port 150c of the operational amplifier when the second output voltage V2 is lower than the second reference voltage Vref_2. [25] The output voltage of the output port 150c of the second comparator 150 is applied to a frequency controller 170 and converted to a predetermined frequency value to control the chopper circuit 140 such that the chopper circuit 140 maintains the output voltage V2 of 14.5V.
[26] That is, when the output voltage V2 of the chopper circuit 140 does not reach 14.5V although it is higher than 9 V, the output voltage V2 is boosted to 14.5V, and thus the stable output voltage V2 can be provided.
[27] Here, it is preferable to construct the frequency controller 170 using pulse width modulation (PWM).
[28] Since the output voltage of the output port 150c of the second comparator 150 may include a noise component, the output voltage passes through the filter 180 composed of a resistor R and a capacitor C to be output as a stabilized voltage of 14.5V.
[29] When the filter output voltage V2 obtained by passing the input voltage Vl through the filter 180 is applied to the oxygen sensor controller 190, the oxygen sensor controller 190 immediately outputs an oxygen sensor control voltage V5.
[30] The oxygen sensor control voltage V5 output from the oxygen sensor controller 190 is continuously output to the oxygen sensor 80 for one minute according to an internal timer to supply oxygen, and thus imperfect combustion generated at the initial starting stage is prevented to induce fuel reduction.
[31] The oxygen sensor 80 is operated by the oxygen sensor control voltage V5 output from the oxygen sensor controller 190 for one minute and then stopped until the next ignition.
[32] When the input voltage Vl is input to the ignition coil plunger 200, the ignition coil plunger 200 passes the input voltage Vl and outputs the input voltage Vl as the ignition coil plunger output voltage V4 to the ignition coil 90.
[33] When the filter output voltage V3 output from the filter 180 is applied to the ignition coil plunger 200, the input voltage Vl is cut according to a voltage boosted from the input voltage Vl, and then the filter output voltage V3 is substituted by the ignition coil plunger output voltage V4 and the ignition coil plunger output voltage V4 is output. Accordingly, a more stable voltage is maintained to prevent a voltage variation according to load and stable and uniform ignition is promoted to induce perfect combustion.
[34] The output terminal 100b of the fuel reducing apparatus 100 for a vehicle is electrically connected to the input line 21 of the alternator 20, and thus the output voltage V2 is provided to the input terminal of the alternator 20. Mode for the Invention
[35] The operation of the fuel reducing apparatus for a vehicle according to the present invention will be explained with reference to FIGS. 1 and 2.
[36] When the vehicle is started to drive the engine 10, the alternator 20 operating with the engine 10 is provided with power of the battery 60 according to the operation of the alternator relay 50.
[37] The fuel reducing apparatus 100 for a vehicle according to the present invention is connected to the input terminal of the alternator 20 and the input voltage Vl in the range of 9 to 13.5V is input to the fuel reducing apparatus 100 from the output terminal of the alternator relay 50. The input voltage Vl in the range of 9 to 13.5V is varied according to load (for example, a head light, a tail light, various window motors and an air conditioner).
[38] The first comparator 110 compares the input voltage Vl input through the alternator relay 50 with the first reference voltage Vref_l provided by the first reference voltage supply unit 120 and the switch 130 is turned on when the input voltage Vl is higher than the first reference voltage Vref_l corresponding to 9 V to apply the input voltage Vl to the chopper circuit 140.
[39] The input voltage Vl higher than or equal to 9 V input to the chopper circuit 140 is output as the output voltage V2 corresponding to 14.5V.
[40] The second comparator 150 compares the output voltage V2 with the second reference voltage Vref_2 supplied from the second reference voltage supply unit 160. A positive potential is generated at the output port of the second comparator 150 when the output voltage V2 is higher than the second reference voltage Vref_2 and a negative potential is generated at the output port of the second comparator 150 when the output voltage V2 is lower than the second reference voltage Vref_2. The signal of the output port of the second comparator 150 is input to the frequency controller 170.
[41] The frequency controller 170 outputs a frequency for controlling the chopper circuit
140 using the signal input through the second comparator 150 to control the chopper circuit 140 to output the uniform output voltage V2 corresponding to 14.5V.
[42] Noise such as a ripple component is removed from the output voltage V2 output from the chopper circuit 140 while the output voltage V2 passes through the filter 180 and the output voltage V2 is input to the input terminal of the alternator 20, and thus the alternator 20 outputs a more stable voltage to the load.
[43] A voltage drop caused by the operation of an air conditioner or a heater leads to a voltage drop at the output terminal of the alternator relay 50. When the input voltage Vl is higher than 9 V, the first comparator 110 compares the input voltage Vl with a reference voltage and controls the switch 130 to output the input voltage Vl. The input voltage Vl output from the switch 130 is boosted while passing through the chopper circuit 140. The output voltage V2 of the chopper circuit 140 is compared with a reference voltage by the second comparator 150 and, when the output voltage V2 is lower than 14.5V, boosted again, and thus the output voltage V2 is stabilized.
[44] A noise component is removed from the output voltage V2 output from the chopper circuit 140 while the output voltage V2 passes through the filter 180, and the output voltage V2 is output as the noise-free filter output voltage V3.
[45] When the filter output voltage V3 output from the filter 180 when the input voltage
Vl is applied to the filter 180 is applied to the oxygen sensor controller 190, the oxygen sensor control voltage V5 is continuously output to the oxygen sensor 80 for one minute from the oxygen sensor controller to supply oxygen. This prevents imperfect combustion occurring at the initial ignition stage to induce fuel reduction.
[46] The oxygen sensor 80 is driven by the oxygen sensor control voltage V5 output from the oxygen sensor controller 190 for one minute, and then stopped until the next ignition.
[47] When the input voltage Vl is input to the ignition coil plunger 200, the ignition coil plunger 200 directly passes the input voltage Vl and outputs the input voltage Vl as the ignition coil plunger output voltage V4 to the ignition coil 90. When the filter output voltage V3 output from the filter 180 is input to the ignition coil plunger 200, a voltage boosted from the input voltage Vl cuts off the input voltage Vl, and then the filter output voltage V3 is substituted by the ignition coil plunger output voltage V4 and output. Accordingly, a more stabilized output is maintained to prevent a voltage variation according to load and promote stable and uniform ignition so as to induce perfect combustion.
[48] When oxygen is supplied through the oxygen sensor 80 and, simultaneously, a stable voltage is provided to the ignition coil 90 while the filter output voltage V3 is maintained as 14.5V through the aforementioned process and input to the input terminal of the alternator 20, mileage improvement effect is obtained, as illustrated in FIG. 3.
[49] That is, although alternators of conventional vehicles have low fuel efficiency, the present invention supplies oxygen and a stabilized voltage while maintaining the output voltage of the alternator 20 as 14.5V to improve mileage by at least 20%.
[50] hile this invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. The preferred embodiments should be considered in descriptive sense only and not for purposes of limitation. Therefore, the scope of the invention is defined not by the detailed description of the invention but by the appended claims, and all differences within the scope will be construed as being included in the present invention. Industrial Applicability
[51] As described above, the fuel reducing apparatus for a vehicle according to the present invention is directly connected to the input terminal of the alternator of the vehicle to outputs a uniform output voltage to the alternator such that the alternator outputs a stable voltage through its output terminal. Accordingly, the stable voltage is supplied to an ECU and a battery to thereby improve the combustion efficiency of an engine. Furthermore, a stable voltage is supplied to various devices of the vehicle to expand the lifespan of various devices.

Claims

Claims
[1] A fuel reducing apparatus for a vehicle, comprising: a first comparator 110 for comparing an unstable input voltage Vl applied thereto through an output line 51 of an alternator relay 50, which is switched to supply power to an input terminal of an alternator 20 when an ignition switch 30 for starting a vehicle engine 10 is turned on, with a first reference voltage Vref_l and outputting a positive potential when the input voltage Vl is higher than the first reference voltage Vref_l; a switch 130 adapted to be turned on when the positive potential is output through an output port of the first comparator 110; a chopper circuit 140 for boosting an output voltage V2 and outputting the boosted output voltage to an input line 21 of the alternator 20 when the switch
130 is turned on; a second comparator 150 for comparing the output voltage V2 of the chopper circuit 140 with a second reference voltage Vref_2; and a frequency controller 170 for receiving a signal corresponding to the comparison result of the second comparator 150 and controlling the output voltage V2 of the chopper circuit 140 such that the output voltage V2 has a uniform level.
[2] The fuel reducing apparatus according to claim 1, further comprising a filter 180 for removing a noise component of the output voltage V2 output from the chopper circuit 140.
[3] The fuel reducing apparatus according to claim 1, further comprising an oxygen sensor controller 190 for continuously outputting an oxygen sensor control voltage V5 for one minute according to an internal timer when a filter output voltage V3, which is obtained when the input voltage Vl passes through the filter 180, is applied thereto, and then stopping the output of the oxygen sensor output voltage V5 until the next ignition.
[4] The fuel reducing apparatus according to claim 1, further comprising an ignition coil plunger 200 for directly passing the input voltage Vl when the input voltage Vl is applied thereto, outputting the input voltage Vl as an ignition coil plunger output voltage V4, cutting off the input voltage Vl according to a voltage boosted from the input voltage Vl when the filter output voltage V3 output from the filter 180 is applied thereto, and then outputting the ignition coil plunger output voltage V4 in stead of the filter output voltage V3.
PCT/KR2008/000144 2007-01-09 2008-01-09 Fuel reducing apparatus for vehicle WO2008084991A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2007-0002495 2007-01-09
KR1020070002495A KR100789963B1 (en) 2007-01-09 2007-01-09 Fuel reducing apparatus for vehicle

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WO2008084991A1 true WO2008084991A1 (en) 2008-07-17

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2014205805A1 (en) * 2013-06-28 2014-12-31 Ingersoll Rand (China) Industrial Technologies Overload protection for vehicle hvac system

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US4536697A (en) * 1983-09-09 1985-08-20 General Motors Corporation Vehicle electrical energy management system
US5767636A (en) * 1995-01-31 1998-06-16 Nippondenso Co., Ltd. Vehicle power generating apparatus
KR19990047840A (en) * 1997-12-05 1999-07-05 윤종용 Alternator output voltage stabilization circuit in automobile

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JP4983109B2 (en) * 2006-06-23 2012-07-25 オムロン株式会社 Radio wave detection circuit and game machine

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US4536697A (en) * 1983-09-09 1985-08-20 General Motors Corporation Vehicle electrical energy management system
US5767636A (en) * 1995-01-31 1998-06-16 Nippondenso Co., Ltd. Vehicle power generating apparatus
KR19990047840A (en) * 1997-12-05 1999-07-05 윤종용 Alternator output voltage stabilization circuit in automobile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014205805A1 (en) * 2013-06-28 2014-12-31 Ingersoll Rand (China) Industrial Technologies Overload protection for vehicle hvac system

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