WO2000005092A1 - Programmable speed limit device for passenger cars, trucks and motorcycles - Google Patents
Programmable speed limit device for passenger cars, trucks and motorcycles Download PDFInfo
- Publication number
- WO2000005092A1 WO2000005092A1 PCT/EP1998/004519 EP9804519W WO0005092A1 WO 2000005092 A1 WO2000005092 A1 WO 2000005092A1 EP 9804519 W EP9804519 W EP 9804519W WO 0005092 A1 WO0005092 A1 WO 0005092A1
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- WO
- WIPO (PCT)
- Prior art keywords
- speed limit
- speed
- limit device
- lever
- fact
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/01—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens
- B60R25/04—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the propulsion system, e.g. engine or drive motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K31/00—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator
- B60K31/02—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator including electrically actuated servomechanism including an electric control system or a servomechanism in which the vehicle velocity affecting element is actuated electrically
- B60K31/04—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator including electrically actuated servomechanism including an electric control system or a servomechanism in which the vehicle velocity affecting element is actuated electrically and means for comparing one electrical quantity, e.g. voltage, pulse, waveform, flux, or the like, with another quantity of a like kind, which comparison means is involved in the development of an electrical signal which is fed into the controlling means
- B60K31/042—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator including electrically actuated servomechanism including an electric control system or a servomechanism in which the vehicle velocity affecting element is actuated electrically and means for comparing one electrical quantity, e.g. voltage, pulse, waveform, flux, or the like, with another quantity of a like kind, which comparison means is involved in the development of an electrical signal which is fed into the controlling means where at least one electrical quantity is set by the vehicle operator
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
Programmable speed limit device for passenger cars and motorcycles consisting of an electronic or electromechanical control unit, several input and programmable devices, transducers for data acquisition, time switches, remote activation units, output devices, and servo-actuators, being all these components controlled by the electronic unit, said speed limit device characterised in that it acts on the mechanical components, which are responsible of the motion generation and transmission, and limits the maximum vehicle speed. Such a speed can be specified by the user for a programmable time duration.
Description
Title: Programmable speed limit device for passenger cars, trucks and motorcycles
Applicant: Magliocchetti Marco
Technical field
The present invention relates to a programmable speed limit device for passenger cars and motorcycles.
Unfortunately, the number of car accidents (often fatal) due to the high speed of the vehicles, is quite high. On Saturday night, for example, the high speed together with precarious driving conditions (climatic factors, inexperienced drivers, inattentions, drunkenness, etc.) cause many car accidents. Measurements like the limitation of the closing time of discos and similar, the prohibition of alchool or the limitation of the maximum speed on highways and motorways were taken by the Government. On the other side, also car manufacturers equip their vehicles with safety devices such as seat-belts, air-bags, etc. The drawback of these measures is that they do not act against the very cause: the severity of injuries in a accident always depends on the car high speed, because the impact energy between two bodies is proportional to their mass and speed. Therefore, until the maximum speed is not limited, the safety devices and regulations will not be effective.
Disclosure of the invention
The invention is characterized by distinguished standard on the market because it is a programmable speed limit device for passenger cars and motorcycles consisting of an electronic or electromechanical control unit, several input and programmable devices, transducers for data acquisition, time switches, remote activation units, output devices, and servo-actuators, being all these components controlled by the electronic unit. Said speed limit device characterised in that it acts on the mechanical components, which are responsible of the motion generation and transmission, and limits the maximum vehicle speed. Such a speed can be specified by the user for a programmable time duration. Of course, the installation of such device is possible for both private and public use for minimizing the fatal accidents, at least in those days characterised by heavy traffic.
A control device can be installed to remote activation that allows the user to program and activate the speed limit device without being on board of the vehicle. For example, policemen can control (first warning an advice and then activating the device) the speed limits in the areas in which such a limit is prescribed by law.
The speed limit device can also be used as antitheft device, by limiting the speed to a value of 0 km/h.
These and other advantages will be pointed out in the detailed description of the invention that refers to the figures of tables 1/8-8/8 in which the way of carrying out the invention is
examplifying and not restrictive.
Way of carrying out the invention With reference to the above mentioned tables: • Figure 1 is the generic scheme of the invention;
• Fig. 2 is a more detailed scheme of the invention;
• Fig. 3 represents the logic of the device;
• Fig. 4 is the scheme of a first example of actuator;
• Fig. 5 is the scheme of a second example of actuator; • Fig. 6 represents the usual connection between the accelerator pedal and the fuel feeding system (carburettor, injectors, etc.);
• Fig. 7 is the scheme of a third example of actuator;
• Fig. 8a is a view of such third actuator in a not functioning situation; • Fig. 8b is a view of such third actuator in a functioning situation.
The speed limit device, schematized in Fig. 1, is referenced as 1.
It comprises an electronic or electromechanic control unit 2 and several peripheral components : an input programmable device 3, data acquisition transducers 4, time switches 5, remote activation units (not shown in Fig. 1), output devices 7 and servo-actuators
6.
The principle of operation of the invention can be determined from
Fig. 1 : the control unit 2, governing the other components, limits the vehicle's speed by regulating the quantity of fuel injected
according to the environmental condition and the engine parameters. Thanks to a suitable software, the control unit can limit the fuel injected quantity per engine cycle, taking into account other parameters (car speed, transmission ratio, etc.). Moreover, the control unit can also limits the car's speed for limited period of time (for instance, during the week-end) to go back to the usual speed.
The input and programmable device 3 can be PC-keyboards, electronic or mechanic keys or electronic cards. By means of which, the control unit 2 acquires the information about the desired program (maximum speed allowed and its duration). Proper time switches 5 will determine the end of the speed limit period. To manage such a speed limitation program, the control unit processes the data acquired by the several transducers, among which there is a crankshaft rpm sensor and a wheel speed sensor. Since the car's speed and not the engine rpm is to be limited (it is important, in fact, to mantain the acceleration at low speed !) the control of the car's speed should be done after the speed gear. Of course, the control unit also uses the data acquired by the other transducers of the injection system (fuel pressure and temperature transducer, air temperature transducer, accelerator pedal transducer, etc.).
According to another not limiting application of the invention, the speed limit device could be provided with suitable remote activation units (infrared transmission systems, radio waves, etc.)
to remote control the car (for example, by the parent having left his car to his son). Such activation can be protected by suitable passwords. Moreover, the speed limit device should be provided with output devices (monitor, display, led) for the visualization of all interesting parameters. Finally, the invention is provided with servoactuators of mechanical, magnetic or piezoelectric type, able to deteπnine the quantity of the injected fuel.
Example
According to Fig. 2, the principle of operation of the speed limit device is based upon the monitoring of the wheel rotating speed 21, by means of a Hall sensor 22. The frequency signal transmitted by the transducer is transformed into an amplitude signal by means of a frequency/voltage converter 23. Then this signal is compared to the amplitude signal coming from the programmable block (keybord 24 with a display 25, converter D/A 26, signal generator 27, frequency/voltage converter 28). This signal is proportional to the desired speed that the user can input from the keyboard. The comparison is made on the unit 29 that is the core of the device. As shown in Fig. 3, in such a unit the input signals are VI coming from the programmable block and V2 coming from the transducer and the output signal is called V3. The values of V3 are according to the following logic:
1. If VI > V2 then V3 = 0 (no signal)
2. If Vl ≤ V2 then V3 = l
For example, if the desired max. speed is 100 km/h and the vehicle speed is lower than this set-up value, then VI > V2 and V3 = 0 and this means no action of the device. On the other side, if the vehicle speed is higher than 100 km/h, then VI < V2 and V3 = 1 and this means that the device will limit the vehicle speed by means of an actuator. When the vehicle speed falls down the setup value the device comes back in the condition V3 = 0, no action.
As already said, actuators can be elecfromechamcal, electronical or piezo ones. The three types of electromechanical actuators described below are suitable for controlling feeding system like carburettors and similar by means a direct control, and injection system by means of an interface card.
• As shown in Fig. 4, this first actuator acts directly on the accelerator rod 41. It consists of an endless screw 42 controlled by an electric motor 43 which moves the carburettor's throttle shaft 45 via a forked lever 44. When the device is not working, the forked-lever 44 is in 0 position and the control lshaftever can allow the throttle valve to rotate from the minimum to the maximum opening position. When the device is operating and the vehicle speed exceeds the set point, the control unit actuates the electric motor 43, the endless screw 42 moves the forked-lever 44 to a position that regulate the throttle plate opening via the shaft 45. The partial opening of the throttle plate, limiting the air flow, forces the engine to slow down to the programmed setpoint.
• The second actuator (Fig. 5) is fixed between the control lever 51 of the accelerator pedal and the throttle valve 52. In particular, a gearmotor 53 controls directly the throttle valve. The gearmotor is governed by means of a couple of differential potenziometers 54 and 55: in normal condition the position of lever 56 which acts on the throttle valve is determined by the balance of the two potentiometers. Positive or negative
variations of the potenziometer 54 will corrispond to an acceleration or a decelleration of the engine. When the device is operating and the vehicle speed exceeds the set point, the control unit deactivate the gearmotor via a control card 57: the throttle plate does not vary position until the car's speed reaches the programmed setpoint; in this condition the device will be automatically deactivated. An electromagnetic brake system 58, which locks the gearmotor shaft, is needed in order to prevent movements of the throttle plate due to the air flow. This third actuator interrupts accelerator pedal wire before the levers governing the throttle valve. Fig. 6 is the scheme of a known connection between accelerator and carburettor, while Fig. 7 shows the scheme including the actuator. The accelerator pedal wire 71 is connected with lever 72 of the actuators; on the opposite end, a second lever 73 is connected to the carburettor's wire 74. In Fig. 8 the details of this actuator are shown with the speed limit device in off position (Fig. 8a). The lever 72 is connected to the lever 73 by means of two frontal gears 75 and 76. In particular, the gear 76 is fixed on the lever 73 while the gear 75 can slide along the axe of the lever 72. Each angular variation transmitted from the accelerator pedal is transmitted to the throttle valve too, by means of the two levers. When the speed limit device is on and the vehicle speed exceeds the set-up value (Fig. 8b), the signal from the control unit acts the actuator: the electromagnets 77
and 78 are excited; the first electormagnet 77 attracts the gear 75 to the right in Fig. 8b while the second electromagnet 78 forces the plate 79, the sliding 80 and a third frontal gear 81 to move to the right eliminating the connection between gears 75 and 76 and establishing the connection between gear 76 and gear 81. This means that the levers 72 and 73 are disconnected and the lever 73 is connected to the plate 79 which cannot rotate. Once vehicle's speed is below the set-up value the connection between levers 72 and 73 is re-established by the springs 82 and 83, when the control unit disactivate the two electromagnets 77 and 78. Moreover, the actuator is provided with a system 84 which controls the angular alineament between the two levers 72 and 73.
Claims
Claims
1) Programmable speed limit device for passenger cars and motorcycles consisting of an electronic or electromechanical control unit, several input and programmable devices, transducers for data acquisition, time switches, remote activation units, output devices, and servo-actuators, being all these components controlled by the electronic unit, said speed limit device characterised in that it acts on the mechanical components, which are responsible of the motion generation and transmission, and limits the maximum vehicle speed. Such a speed can be specified by the user for a programmable time duration.
2) Speed limit device according to the claim 1 characterised by the fact that the control unit 2, governing the other components, limits the vehicle's speed by regulating the quantity of fuel injected according to the environmental condition and the engine parameters.
3) Speed limit device according to the claims 1 or 2, characterised by the fact that such input and programmable devices comprise one or more of the followings: PC keyboards, electronic or mechanic keys, electronic cards.
4) Speed limit device according to one of the previous claims, characterised by the fact that among the transducers there are a crankshaft rpm sensor and a wheel speed sensor. 5) Speed limit device according to one of the previous claims,
characterised by the fact that the remote activation units comprise infrared transmitting systems and/or radio-waves transmitting systems and that the activation can be protected by suitable passwords. 6) Speed limit device according to one of the previous claims, characterised by the fact that such output devices comprise monitors, displays or led.
7) Speed limit device according to one of the previous claims, characterised by the fact that such servo-actuators comprise magnetic, piezoelectric or other kinds of servo-actuators to adjust the fuel-injection parameters.
8) Speed limit device according to one of the previous claims, characterised by the fact that the functioning principle of the device is based on: detection of the vehicle by means of a Hall sensor 22; transformation of the frequency signal into an amplitude signal V2 by means of a frequency/voltage converter 23; comparison (made on the control unit 29) of such a signal to the amplitude signal VI from the programmable block (keybord 24 with a display 25, converter D/A 26, signal generator 27, frequency/voltage converter 28); emission of an output signal V3 according to this logic: VI > V2 then V3 = 0 (no signal); VI < V2 then V3 = 1 (device active).
9) Actuator of a speed limit device characterized by the fact that
it consists in an endless screw 42 controlled by an electric motor 43; such endless screw, by means of a forked-lever 44 and other mechanical connections controls the accelerator- rod and so the control lever 45 of the butterfly valve. When the device is operating and the vehicle speed exceeds the set point, the control unit actuates the electric motor 43, the endless screw 42 moves the forked-lever 44 to a position that regulate the throttle plate opening via the shaft 45. The partial opening of the throttle plate, limiting the air flow, forces the engine to slow down to the programmed setpoint.
10) Actuator of a speed limit device characterized by the fact that it is fixed between the control lever 51 of the accelerator pedal and the throttle valve 52. It consists of a gearmotor 53 which controls directly the throttle valve, and it is governed by means of a couple of differential potenziometers 54 and 55: in normal condition the position of lever 56 which acts on the throttle valve is determined by the balance of the two potentiometers. Positive or negative variations of the potenziometer 54 will corrispond to an acceleration or a decelleration of the engine. When the device is operating and the vehicle speed exceeds the set point, the control unit deactivate the gearmotor via a control card 57: the throttle plate does not vary position until the car's speed reaches the programmed setpoint; in this condition the device will be automatically deactivated.
11) Gear motor of an electromechanical actuator characterized by the fact that it is provided with an electromagnetic brake system 58 which helps the locking of such gear motor against the air flow in a throttle valve. 12) Actuator of a speed limit device characterized by the fact that it interrupts accelerator pedal wire before the levers governing the throttle valve. The accelerator pedal wire 71 is connected with lever 72 of the actuator; on the opposite end, a second lever 73 is connected to the carburettor's wire 74. The lever 72 is connected to the lever 73 by means of two frontal gears
75 and 76. In particular, the gear 76 is fixed on the lever 73 while the gear 75 can slide along the axe of the lever 72. When the speed limit device is on and the vehicle speed exceeds the set-up value, the signal from the control unit acts the actuator: the electromagnets 77 and 78 are excited; the first electormagnet 77 attracts the gear 75 while the second electromagnet 78 forces the plate 79, the sliding 80 and a third frontal gear 81 to move eliminating the connection between gears 75 and 76 and establishing the connection between gear 76 and gear 81. This means that the levers 72 and 73 are disconnected and the lever 73 is connected to the plate 79 which cannot rotate. Once vehicle's speed is below the set-up value the connection between levers 72 and 73 is reestablished by the springs 82 and 83, when the control unit disactivate the two electromagnets 77 and 78.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP1998/004519 WO2000005092A1 (en) | 1998-07-20 | 1998-07-20 | Programmable speed limit device for passenger cars, trucks and motorcycles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP1998/004519 WO2000005092A1 (en) | 1998-07-20 | 1998-07-20 | Programmable speed limit device for passenger cars, trucks and motorcycles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2000005092A1 true WO2000005092A1 (en) | 2000-02-03 |
Family
ID=8167010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1998/004519 WO2000005092A1 (en) | 1998-07-20 | 1998-07-20 | Programmable speed limit device for passenger cars, trucks and motorcycles |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2000005092A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITPD20090061A1 (en) * | 2009-03-25 | 2010-09-26 | Hassan Obeidat | SELF-RETURN SPEED DEVICE FOR VEHICLES |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2351814A1 (en) * | 1974-06-21 | 1977-12-16 | Peugeot & Renault | Vehicle speed regulating device - has electric amplifier which controls motor in turn adjusting max. opening of carburettor butterfly valve |
| DE2630071A1 (en) * | 1976-07-03 | 1978-01-12 | Horst Ing Grad Rathert | Speed limiting system for vehicles - has speed dependent servo adjusted throttle stop set according to tachogenerator |
| FR2470019A1 (en) * | 1979-11-23 | 1981-05-29 | Tisseront Andre | Motor vehicle maximum speed limiter - uses optical speed transducer to compare actual and preset speeds and circuit to drive servo mechanism to control throttle opening |
| EP0260372A1 (en) * | 1986-09-13 | 1988-03-23 | VDO Adolf Schindling AG | Device for limiting the speed of an automotive vehicle |
| US4776420A (en) * | 1986-03-15 | 1988-10-11 | Alfred Teves Gmbh | Device for automotive vehicles with traction control and cruise control |
| EP0289109A2 (en) * | 1987-04-30 | 1988-11-02 | Sturdy Corporation | Engine governor with emergency throttle limiter |
| US4786868A (en) * | 1985-09-07 | 1988-11-22 | Romatic Limited | Speed control unit |
| US4809656A (en) * | 1987-04-14 | 1989-03-07 | Nippon Cable System Inc. | Actuator for automatic cruising system |
| US4899623A (en) * | 1987-06-13 | 1990-02-13 | Vdo Adolf Schindling Ag | Control system for internal combustion engines |
| WO1991008124A1 (en) * | 1989-11-29 | 1991-06-13 | Reginald Gwynne Evan David | Vehicle speed control device |
| US5152360A (en) * | 1989-07-18 | 1992-10-06 | Eaton Corporation | Throttle cable intervention device |
| EP0624488A1 (en) * | 1993-05-11 | 1994-11-17 | Massimo Giancarlo Berra | Device for adjusting and limiting the motor vehicle speed |
| DE4431070A1 (en) * | 1994-09-01 | 1996-03-07 | Daimler Benz Ag | Vehicle access-code anti-theft security system |
| DE19601816A1 (en) * | 1996-01-19 | 1997-07-24 | Bayerische Motoren Werke Ag | Vehicle security system |
| US5769051A (en) * | 1996-05-29 | 1998-06-23 | Bayron; Harry | Data input interface for power and speed controller |
-
1998
- 1998-07-20 WO PCT/EP1998/004519 patent/WO2000005092A1/en active Application Filing
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2351814A1 (en) * | 1974-06-21 | 1977-12-16 | Peugeot & Renault | Vehicle speed regulating device - has electric amplifier which controls motor in turn adjusting max. opening of carburettor butterfly valve |
| DE2630071A1 (en) * | 1976-07-03 | 1978-01-12 | Horst Ing Grad Rathert | Speed limiting system for vehicles - has speed dependent servo adjusted throttle stop set according to tachogenerator |
| FR2470019A1 (en) * | 1979-11-23 | 1981-05-29 | Tisseront Andre | Motor vehicle maximum speed limiter - uses optical speed transducer to compare actual and preset speeds and circuit to drive servo mechanism to control throttle opening |
| US4786868A (en) * | 1985-09-07 | 1988-11-22 | Romatic Limited | Speed control unit |
| US4776420A (en) * | 1986-03-15 | 1988-10-11 | Alfred Teves Gmbh | Device for automotive vehicles with traction control and cruise control |
| EP0260372A1 (en) * | 1986-09-13 | 1988-03-23 | VDO Adolf Schindling AG | Device for limiting the speed of an automotive vehicle |
| US4809656A (en) * | 1987-04-14 | 1989-03-07 | Nippon Cable System Inc. | Actuator for automatic cruising system |
| EP0289109A2 (en) * | 1987-04-30 | 1988-11-02 | Sturdy Corporation | Engine governor with emergency throttle limiter |
| US4899623A (en) * | 1987-06-13 | 1990-02-13 | Vdo Adolf Schindling Ag | Control system for internal combustion engines |
| US5152360A (en) * | 1989-07-18 | 1992-10-06 | Eaton Corporation | Throttle cable intervention device |
| WO1991008124A1 (en) * | 1989-11-29 | 1991-06-13 | Reginald Gwynne Evan David | Vehicle speed control device |
| EP0624488A1 (en) * | 1993-05-11 | 1994-11-17 | Massimo Giancarlo Berra | Device for adjusting and limiting the motor vehicle speed |
| DE4431070A1 (en) * | 1994-09-01 | 1996-03-07 | Daimler Benz Ag | Vehicle access-code anti-theft security system |
| DE19601816A1 (en) * | 1996-01-19 | 1997-07-24 | Bayerische Motoren Werke Ag | Vehicle security system |
| US5769051A (en) * | 1996-05-29 | 1998-06-23 | Bayron; Harry | Data input interface for power and speed controller |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITPD20090061A1 (en) * | 2009-03-25 | 2010-09-26 | Hassan Obeidat | SELF-RETURN SPEED DEVICE FOR VEHICLES |
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