CN1888407A - Electrojet engine variable working displacement control technique - Google Patents
Electrojet engine variable working displacement control technique Download PDFInfo
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- CN1888407A CN1888407A CN 200610012987 CN200610012987A CN1888407A CN 1888407 A CN1888407 A CN 1888407A CN 200610012987 CN200610012987 CN 200610012987 CN 200610012987 A CN200610012987 A CN 200610012987A CN 1888407 A CN1888407 A CN 1888407A
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Abstract
The present invention provides an electronic injection engine variable working displacement volume control device. It includes two portions of fuel injection control mode and engine injection control device. Said fuel injection control mode includes two portions of fuel injection mode under the condition of different working displacement volumes and control logic mode under the different working conditions. The injection control device is composed of two portions of injector control additional circuit and variable working displacement volume controller.
Description
Technical field
The present invention relates to a kind of control technique of electronic fuel injection formula internal-combustion engine.
Background technique
The design discharge capacity overwhelming majority of existing motor is a fixed value.No matter payload in operation process, all discharge capacities all participate in work.Known that by Principles of Internal-Combustion Engine hour specific fuel consumption is higher in Rate of load condensate, exhaust emission is bigger; Specific fuel consumption was less when Rate of load condensate was big, and exhaust emission is also less.For example petrol engine generally when Rate of load condensate is about 80-90% specific fuel consumption minimum, exhaust emission is minimum.Be installed in the motor on the automobile, its power all is equipped with according to extreme operating conditions such as full load highest speed or max. climb slope.And under most of use condition, for example travel in the city proper, Rate of load condensate has only 20-50% usually, thereby oil consumption is higher; At running on expressway, owing to improved the Rate of load condensate of motor, oil consumption can reduce.Automobile with small output volumn is than the main reason of big discharge capacity automobile oil-saving, and the Rate of load condensate that is exactly automobile with small output volumn motor as a rule is than big discharge capacity automobile height.
From eighties of last century sixties just the someone study cylinder closing oil-saving technical, promptly when engine load rate is low with half cylinder burn-out work done.The somebody has applied for patent to the eighties, and for example Chinese patent ZL 87215817 is Dong Feng Auto Corporation's applications.The substance of this patent is the air valve that the installation and control mixed gas enters in the intake manifold behind Carburetor, and the air valve of certain cylinder is closed, and this cylinder is the burn-out work done.This technology is owing to reasons such as complex structure, sealing difficulty can't be implemented.In the Chinese patent literature of nearest more than ten years, the document of cylinder closing oil-saving control aspect is arranged also.For example Chinese patent ZL 92226188, and this technology makes diesel engine cut off the fuel delivery of a part of cylinder when low-load is worked, to reach fuel-efficient purpose by solenoid valve and pipeline.This patent proposes: cutting off the fuel delivery of some cylinder, can be manual manipulation, also can use electric control, does not but propose concrete control gear.Chinese patent ZL 02208975 has proposed can save fuel oil and reduce exhaust emission internal-combustion engine take the to circulate method of closing cylinder, and has proposed circulation and close cylinder and can carry out regularly.But what concrete rule is, adopt that cylinder is closed in circulation, the technology contents such as closing cylinder of how realizing clocklike circulating does not all provide concrete technological scheme under what operating mode, thereby do not have operability, can't realize.
Summary of the invention
For suitable raising engine load rate and according to its actual load at work, the invention provides a kind of electrojet engine variable working displacement control technique, the present invention can be according to the signal of motor and the output of automobile related sensor, automatically judge the payload in the engine operation, and can control the normal oil spout of oil sprayer or the time-out of each cylinder regularly, can determine actual engine displacement of working as required, reach the purpose of saving fuel oil, reducing exhaust emission and minimizing cylinder wear.
The technical solution adopted for the present invention to solve the technical problems is: the present invention includes oil spout control mode and motor oil spout control gear two-part, the fuel injection mode when oil spout control mode (software) comprises variant work discharge capacity and the control logic pattern two-part under the variant operating mode; Oil spout control gear (hardware) is by oil sprayer control adjunct circuit 6 and exchange work and make discharge capacity controller 5 two-part and form:
Engine rotational speed signal 1, vehicle speed signal 2, throttle opening signal 3 and 4 inputs of coolant temperature signal are exchanged work and are made discharge capacity controller 5, the control signal input oil sprayer control adjunct circuit 6 of exchanging work and making discharge capacity controller 5, each oil sprayer of oil sprayer control adjunct circuit 6 control cylinders, the injector waveform signal input of former engine electric spray system ECU 7 is exchanged work and is made discharge capacity controller 5; The input of these signals can be used the sensor signal of former car, also sensor installation separately.In these 5 signals, throttle opening and injector waveform are absolutely necessary, and can consider, also can ignore for other 3.If do not consider other 3 factors, it is much simple that corresponding fuel injection mode and control mode are wanted, but its function, performance also will reduce.
Oil sprayer control adjunct circuit 6 is made up of switch triode 12 of connecting with oil sprayer 8 and bypass to ground 13, the bypass triode 14 in parallel with oil sprayer, the 16 termination positive supplies of one of 8 two leads of oil sprayer, another lead meets the ECU 7 of former engine electric spray system through switch triode 12, connects a reverser 15 between switch triode 12 and 14 the base stage; The base terminal 17 of triode 12 connects to exchange work makes discharge capacity controller 5.When 17 ends are high petential, triode 12 conductings, oil sprayer 8 can oil spout (by ECU 7 decisions); When 17 ends were low potential, triode 12 ended, oil sprayer 8 not oil spouts.But triode 14 conductings can provide electric current for ECU 7 by bypass to ground 13.The resistance of bypass to ground 13 equates with the coil resistance of oil sprayer 8.Thereby the electric current that provides through bypass to ground equates substantially with the electric current that provides through oil sprayer, so can not influence the service behaviour of ECU.
Exchanging work and making discharge capacity controller 5 is intelligent control units of being made by common intergrated circuit or programmable gate array or programmable controller or single-chip microcomputer.Exchanging work and making discharge capacity controller 5 is intelligent control part, it comprise front end signal processing unit 22 that input signal is handled, storage data storage unit 23, judge and the reasoning element 24 of reasoning from logic and 25 4 parts of control unit of control oil sprayer adjunct circuit:
A. signal processing unit 22 is handled engine rotational speed signal 1, vehicle speed signal 2, throttle opening signal 3, coolant temperature signal 4 and is electric injection system ECU the 1st cylinder injector waveform input 21;
B. fuel injection mode and the control logic pattern with design deposits in the storage unit 23;
C. reasoning element 24 is judged the working condition of motor and automobile according to the data after the signal processing unit processes;
D. control unit 25 is according to judged result, control adjunct circuit 6 according to the fuel injection mode and the control logic pattern that are stored in the storage unit 23 by oil sprayer, control each oil sprayer according to given fuel injection mode work, promptly control the normal oil spout of each oil sprayer or suspend oil spout.
Fuel injection mode when oil spout control mode (software) comprises variant work discharge capacity and the control logic pattern two-part under the variant operating mode:
The discharge capacity fuel injection mode is made in exchanging work of motor:
Fuel injection mode is the Changing Pattern of each cylinder cycle alternation work done or time-out.General design method is as follows:
A. M cylinder with motor is divided into two groups, and every group has M/2 cylinder.One group in 4 Cylinder engines, 1,4 cylinders in upright arrangement, 2,3 cylinders are another group; One group in 6 Cylinder engines, 1,3,5 cylinders in upright arrangement, 2,4,6 cylinders are another group; One group in the motor one side cylinder that V-type is arranged, the opposite side cylinder is another group.
B., it is a control cycle that N work cycle is set, N 〉=2, General N=4,8 or 16.
C. design cylinder fuel injection or suspend cycle alternation and carry out.In a control cycle, the cylinder of break-off is even as far as possible, and the no more than circulation of same cylinder break-off is to guarantee that running steadily;
D. the number of times of each cylinder oil spout is equal as far as possible in a control cycle, to guarantee each cylinder wearing and tearing evenly.
E.M cylinder in a control cycle (comprising N work cycle) all the total degree of work done be MN time; If the work done number of times of M cylinder reality is M in a control cycle
nInferior, the displacement percentage of then working is M
n/ MN.
F. the displacement percentage of working is classification, and the differential of adjacent two-stage is 1/2N.
Wherein:
The cylinder number of M-motor, M=4,6,8 or 12;
The work cycle number that control cycle of N-comprises;
M
nThe work done number of times of-M cylinder reality in a control cycle, M
n≤ MN.
Motor is exchanged work and is made the discharge capacity control mode:
Control logic be motor with automobile when the different operating modes work, select the method for work displacement percentage and corresponding fuel injection characteristic, be the foundation that reasoning element carries out reasoning and judging.
If input parameter is engine speed, automobile driving speed and throttle opening, and engine speed and the speed of a motor vehicle respectively be divided into low speed, middling speed, 3 grades at a high speed, that throttle opening is divided into is little, in, big 3 grades, then 3 parameters combination go out 3
3=27 kinds of working conditions.Can also import gear signal.If automobile has 5 forward gearss, be combined into 3 with above-mentioned 3 input parameters
3* 5=135 kind working condition.During reversing, use 100% full work discharge capacity.
When coolant temperature signal 4 input, coolant temperature is divided into " low " and " height " two grades, when it be " low ", belongs to hot turner condition, and is much regardless of engine speed, the speed of a motor vehicle, throttle opening, Quan all use the discharge capacity of working; When it is " height ", be applicable to that motor is exchanged work to make the discharge capacity control logic.
By above-mentioned 5 input parameters and classify, can be divided into 137 kinds of different operating modes altogether.
Generally speaking, be provided with k input parameter, each input parameter is divided into p respectively
1, p
2..., p
kIndividual grade, other has q special operation condition (when for example reversing and cooling liquid are low), and then the operating mode number of forming altogether is:
P＝p
1×p
2×…×p
k+q
Every kind of pairing work displacement percentage of operating mode is determined by experience and test.Design is divided into economical, power type and comprehensive three classes.Economical design is guaranteeing to drive under the prerequisite of automobile based on fuel-economizing as far as possible, uses the work discharge capacity of trying one's best little; The power type design is used bigger work discharge capacity to obtain better power; Comprehensive power and fuel-economizing two aspects then taken into account.The automobile of different usage requirements and the driver of different driving habitses can select dissimilar control modes for use.
Realization the present invention exchanges work and makes the discharge capacity fuel injection mode and exchange work to make the discharge capacity control mode, except that using above-mentioned exchanging work to do its function to be integrated among the ECU of engine electric spray system discharge capacity controller, injector controller adjunct circuit and the corresponding software thereof.Can realize function of the present invention fully by the subprogram that changes among the ECU.
The invention has the beneficial effects as follows: this invention can rationally be arranged oil sprayer oil spout or time-out in certain cycle of each cylinder of motor according to the Operational Limits of automobile and motor thereof, determines the displacement percentage of participation work.Guaranteeing under the prerequisite that engine running is steady, output power can be satisfied the demand, make under most operating modes, can both be operated in the higher load rate zone that specific fuel consumption is lower, exhaust emission is lower, thus the purpose of realization fuel-economizing, reduction exhaust emission and minimizing cylinder wear.
Description of drawings
Fig. 1 electrojet engine variable working displacement control technique each several part is formed schematic representation;
Fig. 2 oil sprayer control adjunct circuit schematic representation;
The composition schematic representation that Fig. 3 exchanges work and makes the discharge capacity controller;
Discharge capacity controller circuitry figure is made in exchanging work of Fig. 4 embodiment 2;
Fig. 5 embodiment 1,2 oil sprayer adjunct circuit figure.
In above-mentioned accompanying drawing, 1. engine rotational speed signal input, 2. automobile speed signal input, 3. throttle opening signal input, 4. coolant temperature signal input is 5. exchanged work and is made the discharge capacity controller, 6. the oil sprayer of cylinder control adjunct circuit, 7. electric injection system ECU, the oil sprayer of four cylinders of 8.9.10.11., 12. switch triode, 13. bypass to ground, 14. bypass triodes, 15. reversers, 16. positive supply joint, make discharge capacity controller joint 17. exchange work, 18. intake valves, 19. spark plugs, 20. piston, 21. be the input of electric injection system ECU the 1st cylinder injector waveform, 22. front end signal processing units, 23. storage unit, 24. reasoning from logic unit, 25. control unit, 26. connect oil sprayer control adjunct circuit joint, 27.100% work discharge capacity force switch joint, 28. one, four cylinder injector adjunct circuit joints, 29. two, three cylinder injector adjunct circuit joints, 30. connect first cylinder injector, and 31. connect second cylinder injector, 32. connect the 3rd cylinder injector, 33. connect the 4th cylinder injector.
Embodiment
The simple control of 4 Cylinder engines, 2 input parameters, 3 kinds of work discharge capacities
This embodiment has only 50%, 75%, 100% 3 kind of work discharge capacity, and shown in the table 1 is that exchanging work of embodiment 1 made displacement variation rule (fuel injection characteristic).Its oil spout (work done) order is 1-3-4-2.This kind fuel injection characteristic is a control cycle with 4 work cycle.4 cylinders are divided into two groups, and the 1st, 4 cylinders are one group, and the 2nd, 3 cylinders are one group.Numeral 1,2,3,4 in the table is a cylinder numbers, and the numeral of band " zero " is the cylinder that stops oil spout.The work displacement percentage is the ratio of discharge capacity with the design discharge capacity of actual participation work.It equaled in this cycle (4 circulations), the ratio of the total degree (16 times) of the number of times of actual fuel injection (work done) and all work (oil spouts).For example, second row in the table, in the one-period, 4 circulations are total to oil spout 16 times, and the work displacement percentage is 16/16=100%, i.e. delivery work.In the third line, actual fuel injection is 12 times in 4 circulations, and the work displacement percentage is 12/16=75%.In the fourth line, 4 circulation actual fuel injections 8 times, the work displacement percentage is 8/16=50%.Full table has constituted 100%, 75% and 50%3 kind of work discharge capacity.
The input signal of present embodiment has only coolant temperature and throttle opening.Therefore, decision work displacement percentage has only coolant temperature and two conditions of throttle opening.Table 2 is control logic tables of present embodiment.Represent in the table: when " low ", no matter the throttle opening size is all used 100% work discharge capacity work in coolant temperature; When coolant temperature is " height ", by throttle opening decision work displacement percentage.Throttle opening hour, with 50% discharge capacity of working; When aperture is middle, with 75% work discharge capacity; When aperture is big, with 100% work discharge capacity.
Fig. 4 is that exchanging work of present embodiment made discharge capacity controller circuitry figure.IC1 is a dual comparator among the figure, and IC2 and IC3 are d type flip flop.Terminal 27,21,3,4 connect 100% work discharge capacity force switch, electric injection system ECU the 1st cylinder injector waveform, engine load sensor, cooling-water temperature transmitter respectively, and terminal 28,29 connect oil sprayer control adjunct circuit.
Fig. 5 is the oil sprayer control adjunct circuit of present embodiment.The control terminal that terminal 28,29 are promptly exchanged work and made the discharge capacity controller circuitry among the figure, terminal 30,31,32,33 connect the 1st cylinder, the 4th cylinder, the 2nd cylinder, the 3rd cylinder injector respectively.
This embodiment's characteristics are fuel injection mode, control logic pattern, exchange work that it is all fairly simple to make the discharge capacity controller, and cost is low, is easy to realize.
Discharge capacity fuel injection characteristic table is made in exchanging work of table 14 Cylinder engines
| The work displacement percentage | First circulation | Second circulation | The 3rd circulation | The |
| 16/16＝100％ | 1-3-4-2 | 1-3-4-2 | 1-3-4-2 | 1-3-4-2 |
| 12/16＝75％ | 1-3-4-2 | 1-③-4-② | 1-3-4-2 | ①-3-④-2 |
| 8/16＝50％ | 1-③-4-② | ①-3-④-2 | 1-③-4-② | ①-3-④-2 |
Table 2 is corresponding to the control logic table of table 1 fuel injection characteristic
| Coolant temperature | Throttle opening | The work displacement percentage |
| Low | Arbitrarily | 100％ |
| High | Little | 50％ |
| In | 75％ | |
| Greatly | 100％ |
The control of 4 Cylinder engines, 4 input parameters, 5 kinds of work discharge capacities.
This embodiment has 50%, 62.5%, 75%, 87.5%, 100% 5 kind of work discharge capacity, and table 3 is that exchanging work of embodiment 2 made discharge capacity fuel injection characteristic (pattern) table.Similar with table 1, between 100% and 75% work discharge capacity, increased by 87.5% work discharge capacity, between 75% and 50% work discharge capacity, increased by 62.5% work discharge capacity.
Its general rule is:
1. whole 4 cylinders of motor are divided into two groups, every group has 2 cylinders.
2. 4 Cylinder engines, 1,4 cylinders in upright arrangement are one group, and 2,3 cylinders are another group;
3. it is a control cycle that 4 work cycle are set;
4. design cylinder fuel injection or time-out cycle alternation carry out.In a control cycle, the cylinder of break-off is even as far as possible, and the no more than circulation of same cylinder break-off is to guarantee that running steadily.
5. the number of times of each cylinder oil spout is equal as far as possible in a control cycle, to guarantee each cylinder wearing and tearing evenly.
6.4 individual cylinder in a control cycle all the total degree of oil spout be 16 times; If the oil spout number of times of 4 cylinder reality is M in a control cycle
nInferior (M
n≤ 16), the displacement percentage of then working is M
n/ 16;
7. the work displacement percentage is classification, and the differential of adjacent two-stage is 1/8 design discharge capacity.
Table 4 is that exchanging work of present embodiment made discharge capacity control logic (pattern) table, and discharge capacity fuel injection characteristic (pattern) is made in exchanging work of its correspondence table 3.In this control logic, input parameter is engine speed, automobile driving speed and throttle opening.Wherein the engine speed and the speed of a motor vehicle respectively are divided into basic, normal, highly 3 grades, that throttle opening is divided into is little, in, big 3 grades.3 parameters combination go out 3
3=27 kinds of operating modes.Percentage in the table 2 is the work displacement percentage that should select under the operating mode of correspondence.
Throttle opening is to characterize the most important parameter of Rate of load condensate, therefore also is the most important foundation of judging operating mode.For example, when the engine speed and the speed of a motor vehicle were " low ", during throttle opening " little ", corresponding operating mode was that low speed slides or idling, got final product with 50% work discharge capacity; Throttle opening " in " time be starting or slow the acceleration, with 62.5% discharge capacity of working; Be acceleration or climbing during throttle opening " greatly ", with 75% work discharge capacity.For another example, the engine speed and the speed of a motor vehicle be " in " time, be at the uniform velocity to travel on the good road surface during throttle opening " little ", with 50% work discharge capacity; Throttle opening " in " time be clivia or slow the acceleration, with 62.5% discharge capacity of working; Be the acceleration of overtaking other vehicles during throttle opening " greatly ", perhaps climb bigger slope, with 75% work discharge capacity.All the other as shown in Table.In general, use less work discharge capacity during throttle opening " little ", use bigger work discharge capacity when throttle opening is big.
When coolant temperature was imported, coolant temperature was divided into " low " and " height " two grades.When it is " low ", belong to hot turner condition, no matter engine speed, the speed of a motor vehicle, throttle opening are much, all use 100% work discharge capacity.When it is " height ", be applicable to the control logic of table 4.
Can also utilize the variation of the speed of a motor vehicle and throttle opening to judge acceleration, at the uniform velocity and decelerating mode.In the regular hour, speed of a motor vehicle increase and throttle opening are accelerating mode when big, should increase by 1 grade in the work discharge capacity basis in table 2; The speed of a motor vehicle does not become at the uniform velocity, with listed work discharge capacity in the table 4; The speed of a motor vehicle reduce and throttle opening hour for slowing down, use than littler work discharge capacity corresponding in the table 4.
Fig. 3 is the composition schematic representation that exchanging work of present embodiment made the discharge capacity controller.Fig. 5 is the oil sprayer control adjunct circuit figure of present embodiment.
A kind of the exchanging work of table 34 Cylinder engines made discharge capacity fuel injection characteristic table
| The work displacement percentage | First circulation | Second circulation | The 3rd circulation | The |
| 16/16＝100％ | 1-3-4-2 | 1-3-4-2 | 1-3-4-2 | 1-3-4-2 |
| 14/16＝87.5％ | 1-3-4-2 | 1-3-4-2 | 1-3-4-2 | 1-③-4-② |
| 12/16＝75％ | 1-3-4-2 | 1-③-4-② | 1-3-4-2 | ①-3-④-2 |
| 10/16＝62.5％ | 1-3-4-2 | ①-3-④-2 | 1-③-4-② | ①-3-④-2 |
| 8/16＝50％ | 1-③-4-② | ①-3-④-2 | 1-③-4-② | ①-3-④-2 |
Annotate: not with the cylinder of the numeral oil spout of " zero ", the cylinder of the not oil spout of numeral of band " zero "
A kind of the exchanging work of table 44 Cylinder engines made discharge capacity control logic table
| Engine speed | The speed of a motor vehicle | Throttle opening | ||
| Little | In | Greatly | ||
| Low speed | Low speed | 50％ | 62.5％ | 75％ |
| Middling speed | 50％ | 75％ | 82.5％ | |
| At a high speed | 50％ | 50％ | 50％ | |
| Middling speed | Low speed | 62.5％ | 75％ | 100％ |
| Middling speed | 50％ | 62.5％ | 75％ | |
| At a high speed | 50％ | 50％ | 50％ | |
| At a high speed | Low speed | 62.5％ | 75％ | 82.5％ |
| Middling speed | 50％ | 50％ | 62.5％ | |
| At a high speed | 50％ | 75％ | 100％ | |
Claims (5)
1. electrojet engine variable working displacement control technique, it is characterized in that: the present invention includes oil spout control mode and motor oil spout control gear two-part, the fuel injection mode when the oil spout control mode comprises variant work discharge capacity and the control logic pattern two-part under the variant operating mode; The oil spout control gear is controlled adjunct circuit (6) by oil sprayer and is exchanged work and makes discharge capacity controller (5) two-part and form:
Engine rotational speed signal (1), vehicle speed signal (2), throttle opening signal (3) and coolant temperature signal (4) input are exchanged work and are made discharge capacity controller (5), the control signal input oil sprayer control adjunct circuit (6) of exchanging work and making discharge capacity controller (5), control adjunct circuit (6) is controlled the oil sprayer of each cylinder, and injector waveform signal (7) input of former engine electric spray system ECU is exchanged work and made discharge capacity controller (5); Other automobile running signal, gear for example, also being input to exchanges work does discharge capacity control (5);
Oil sprayer control adjunct circuit (6) is made up of switch triode (12) of connecting with oil sprayer (8) and bypass to ground (13), bypass triode (14) and the phase inverter (15) in parallel with oil sprayer, (16) termination positive supply of one of (8) two leads of oil sprayer, another lead meets the ECU (7) of former engine electric spray system through switch triode (12), connects a reverser (15) between the base stage of switch triode (12) and (14); The base terminal (17) of triode (12) connects to exchange work makes discharge capacity controller (5); Bypass to ground (13), bypass triode (14) also can replace with a bigger pull-up resistor of resistance; When using pull-up resistor to replace bypass to ground and bypass triode, phase inverter (15) is dispensable;
2. electrojet engine variable working displacement control technique according to claim 1, it is characterized in that: exchanging work and making discharge capacity controller (5) is intelligent control part, it comprise front end signal processing unit (22) that input signal is handled, storage data storage unit (23), judge and the reasoning element (24) of reasoning from logic, and (25) four parts of control unit of control oil sprayer adjunct circuit, this four part can be discrete, also can be integrated; When using programmable gate array, programmable controller or single-chip microcomputer to exchange work to make discharge capacity controller (5), the each several part of making the discharge capacity controller of exchanging work integrates:
A. signal processing unit (22) receives and handles the injector waveform (7) of engine rotational speed signal (1), vehicle speed signal (2), throttle opening signal (3), coolant temperature signal (4) and former engine electric spray system ECU, and other automobile running parameter;
B. fuel injection mode and the control logic pattern with design deposits in the storage unit (23);
C. reasoning element (24) is judged the working condition of motor and automobile according to the data of signal processing unit (22) processing;
D. control unit (25) is according to judged result, control adjunct circuit (6) according to the fuel injection mode and the control logic pattern that are stored in the storage unit (23) by oil sprayer, control each oil sprayer according to given fuel injection characteristic work, promptly control the normal oil spout of each oil sprayer or suspend oil spout.
3. electrojet engine variable working displacement control technique according to claim 1 and 2 is characterized in that: the discharge capacity fuel injection mode is made in exchanging work of motor:
A. M cylinder is divided into two groups, every group has M/2 cylinder; One group in 4 Cylinder engines, 1,4 cylinders in upright arrangement, 2,3 cylinders are another group; One group in 6 Cylinder engines, 1,3,5 cylinders in upright arrangement, 2,4,6 cylinders are another group; One group in the motor one side cylinder that V-type is arranged, the opposite side cylinder is another group;
B., it is a control cycle that N work cycle is set, N 〉=2, General N=4,8 or 16;
C. design cylinder fuel injection or suspend cycle alternation and carry out, in a control cycle, the cylinder of break-off is even as far as possible, and the no more than circulation of same cylinder break-off is to guarantee that running steadily;
D. the number of times of each cylinder oil spout is equal as far as possible in a control cycle, to guarantee each cylinder wearing and tearing evenly;
E.M cylinder in a control cycle all the total degree of oil spout be MN time; If the oil spout number of times of M cylinder reality is M in a control cycle
nInferior, the displacement percentage of then working is M
n/ MN;
F. the displacement percentage of working is classification, and the differential of adjacent two-stage is 1/2N;
Wherein:
The cylinder number of M-motor, M=4,6,8 or 12;
The work cycle number that comprises in control cycle of N-;
M
nThe oil spout number of times of-M cylinder reality in a control cycle, M
n≤ MN.
4. electrojet engine variable working displacement control technique according to claim 1 and 2 is characterized in that: motor is exchanged work and is made discharge capacity control logic pattern:
A. input parameter is engine speed, automobile driving speed and throttle opening, wherein the engine speed and the speed of a motor vehicle respectively be divided into low speed, middling speed, 3 grades at a high speed, that throttle opening is divided into is little, in, big 3 grades, 3 parameters combination go out 3
3=27 kinds of operating modes if import 5 gears of speed changer again, then are total to one-tenth 3 capable of being combined
3* 5=135 kind operating mode;
Ordinary circumstance is provided with k input parameter, and each input parameter is divided into p respectively
1, p
2..., p
kIndividual grade, other has q special operation condition, and then the operating mode number of forming altogether is:
P＝p
1×p
2×…×p
k+q
B. every kind of pairing work displacement percentage of operating mode is designed to economical, power type and comprehensive three classes: economical design is based on fuel-economizing, drives under the prerequisite of automobile guaranteeing, uses less work discharge capacity; The power type design is used bigger work discharge capacity to obtain better power; Comprehensive power and fuel-economizing two aspects then taken into account, the automobile of different usage requirements can be selected dissimilar control logic patterns for use with the driver of different driving habitses.
5. electrojet engine variable working displacement control technique according to claim 4, it is characterized in that: when coolant temperature signal (4) is imported, coolant temperature is divided into " low " and " height " two grades, when it is " low ", belong to hot turner condition, no matter other parameter why, all use 100% work discharge capacity; When it is " height ", be applicable to that motor is exchanged work to make the discharge capacity control logic.
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|---|---|---|---|
| CNB2006100129874A CN100402824C (en) | 2006-07-23 | 2006-07-23 | Electrojet engine variable working displacement control technique |
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| CN102536488A (en) * | 2012-03-15 | 2012-07-04 | 长安大学 | Fuel-saving control system and control method of electronic fuel injection engine |
| CN103670757A (en) * | 2014-01-07 | 2014-03-26 | 王志恒 | Variable frequency fuel injection method for engine |
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