CN102943714A - Automobile fuel pump control method - Google Patents
Automobile fuel pump control method Download PDFInfo
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- CN102943714A CN102943714A CN2012104225560A CN201210422556A CN102943714A CN 102943714 A CN102943714 A CN 102943714A CN 2012104225560 A CN2012104225560 A CN 2012104225560A CN 201210422556 A CN201210422556 A CN 201210422556A CN 102943714 A CN102943714 A CN 102943714A
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- ecu
- oil pressure
- oil
- pump
- pressure
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- 239000000446 fuel Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000001276 controlling effect Effects 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 230000004308 accommodation Effects 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 113
- 239000000295 fuel oil Substances 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 3
- 230000006837 decompression Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses an automobile fuel pump control method. A traditional fuel pump control mode is changed, an ECU (electronic control unit) is used to directly drive an oil pump, an oil return pipeline is cancelled, an oil pressure sensor for detecting oil pressure is arranged on an oil rail, a fuel regulation valve is replaced by the oil pressure sensor, the pressure of the oil rail is fed back to the ECU, the ECU controls the work of the oil pump through an oil control algorithm model so as to relatively accurately control the fuel pressure, and meanwhile, the efficiency of the oil pump is improved to save energy.
Description
Technical field
The invention belongs to the Vehicle Electronic Control field, specifically, the present invention relates to a kind of vehicle fuel method for controlling pump.
Background technique
Present automobile fuel pump is controlled to be: as long as motor moves, the oil pump 2 pump oil that will always turn round for keeping the stable of oil pressure, has fuel pressure pressure regulator valve 5 at oily rail 4, by pressure regulator valve 5 fuel oil is turned back to fuel tank 1, utilize the mode of pressure release to keep the stable of oily rail 4 fuel pressures.There are the following problems for the control mode of this fuel pump: 1, oil pump 2 is worked always, does not stop to utilize pressure regulator valve 5 oil returns, and efficient is low; 2, pressure regulator valve 5 control accuracies are accurate not; 3, increase return line, cause waste.
Summary of the invention
Technical problem to be solved by this invention provides a kind of vehicle fuel method for controlling pump, to reach the purpose of the efficient that improves fuel pump.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of vehicle fuel method for controlling pump, oil pump is connected with oily rail by the pump oil pipe, be provided with the oil pressure sensor that is connected with ECU (Electrical Control Unit) ECU that detects oil pressure in the oily rail at oily rail, ECU (Electrical Control Unit) ECU directly is connected with oil pump, the running of control oil pump, ECU (Electrical Control Unit) ECU is built-in with default ECU software, in the ECU software and be preset with the oil pressure desired value;
Described controlling method adopts following steps:
(1) when ignition switch be ON, ECU (Electrical Control Unit) ECU sends a signal to oil pump, directly control oil pump begins full-speed operation, sets up oil pressure;
(2) oil pressure sensor begins to detect the oil pressure in the oily rail, and fuel injection pressure signal is passed to ECU (Electrical Control Unit) ECU;
(3) ECU (Electrical Control Unit) ECU judges according to the fuel injection pressure signal of oil pressure sensor transmission whether the oil pressure in the oily rail reaches the oil pressure desired value;
(4) oil pressure in oily rail does not reach the oil pressure desired value, returns step (1), and ECU (Electrical Control Unit) ECU control oil pump continues full-speed operation;
(5) oil pressure in oily rail reaches the oil pressure desired value, and ECU (Electrical Control Unit) ECU controls the rotating speed of oil pump by control algorithm, and the oil pressure in the oily rail is controlled in the oil pressure target range, keeps the stable of the interior oil pressure of oily rail.
ECU (Electrical Control Unit) ECU controls the rotating speed of oil pump by the PI control algorithm.
The control algorithm of ECU software is divided into the algorithm of oil pressure P part and the algorithm of oil pressure I part, and supportingly has oil pressure to regulate P-I part coefficient table,
The control algorithm of ECU software is:
(1) the oil pressure desired value deducts the oil pressure actual value that is detected by oil pressure sensor, obtains the pressure reduction between oil pressure actual value and the oil pressure desired value;
(2) calculating of oil pressure P part:
(2.1) table look-up by pressure reduction, obtain P part accommodation coefficient;
(2.2) P part regulating system multiply by pressure reduction, obtains P and partly regulates dutycycle;
(2.3) P partly regulates dutycycle by maximum, minimum value restriction, obtains final oil pump control P part regulated quantity;
(3) calculating of oil pressure I part:
(3.1) pressure reduction is tabled look-up, and obtains I part accommodation coefficient as the K input of integrator;
(3.2) pressure reduction is as the input of integrator;
(3.3) ignition key OFF is as initialization condition, and initialization value composes 0;
(3.4) calculate through integrator, obtain I and partly regulate dutycycle;
(3.5) I partly regulates dutycycle by maximum, minimum value restriction, obtains final oil pump control I part regulated quantity;
(4) by oil pressure sensor feedback oil pressure actual value signal, by the closed loop control of PI logic control algorithm, can the oil pressure in the oily rail be controlled in the target range accurately.
The proportional relation of the rotating speed of described oil pump and voltage, the control of pump speed is that the variation by ECU (Electrical Control Unit) ECU driving voltage realizes, corresponding 100% dutycycle of 12V driving voltage, i.e. oil pump full-speed operation, corresponding 0% dutycycle of 0V driving voltage, namely oil pump is not worked.
The present invention adopts technique scheme, compared with prior art, without FP Fuel Pump Relay, and the cancellation return line, this controlling method directly drives oil pump by ECU, by oil pressure sensor signal acquisition oil rail pressure, come rotating speed or the ON/OFF of control oil pump, namely reduce cost, improve again oil pump efficient, good energy-conserving effect, and replace pressure regulator valve with pressure transducer, control accuracy is higher.
Description of drawings
Fig. 1 is oil pump control structural drawing of the present invention;
Fig. 2 is the control logic figure of controlling method of the present invention;
Fig. 3 is the oil pump control algorithm pattern;
Fig. 4 is the oil pump control structural drawing in the background technique
Mark among the above-mentioned figure is: 1, fuel tank; 2, oil pump; 3, pump oil pipe; 4, oily rail; 5, pressure regulator valve; 6, return tube; 7, ECU (Electrical Control Unit) ECU; 8, FP Fuel Pump Relay; 9, oil pressure sensor.
Embodiment
The present invention is a kind of vehicle fuel method for controlling pump.As shown in Figure 1, oil pump 2 extracts fuel oil from mailbox 1, be delivered in the oily rail 4 by pump oil pipe 3, be provided with the oil pressure sensor 9 that is connected with ECU (Electrical Control Unit) ECU7 that detects oily rail 4 interior oil pressure at oily rail 4, ECU (Electrical Control Unit) ECU7 directly is connected with oil pump 2, the running of control oil pump 2, ECU (Electrical Control Unit) ECU7 is built-in with default ECU software, in the ECU software and be preset with the oil pressure desired value.
Be illustrated in figure 2 as the control logic figure of this controlling method, the step that this controlling method adopts is as follows:
(1) when ignition switch be ON, ECU (Electrical Control Unit) ECU7 sends a signal to oil pump 2, oil pressure is set up in directly control oil pump 2 beginning full-speed operations;
(2) oil pressure sensor 9 begins to detect the oil pressure in the oily rail 4, and fuel injection pressure signal is passed to ECU (Electrical Control Unit) ECU7;
(3) ECU (Electrical Control Unit) ECU7 judges according to the fuel injection pressure signal of oil pressure sensor 9 transmission whether the oil pressure in the oily rail 4 reach the oil pressure desired value;
(4) oil pressure in oily rail 4 does not reach the oil pressure desired value, returns step (1), and ECU (Electrical Control Unit) ECU7 control oil pump 2 continues full-speed operation;
(5) oil pressure in oily rail 4 reaches the oil pressure desired value, and ECU (Electrical Control Unit) ECU7 controls the rotating speed of oil pump 2 by control algorithm, and the oil pressure in the oily rail 4 is controlled in the oil pressure target range, keeps the stable of oily rail 4 interior oil pressure.
Because rotating speed and the proportional relation of voltage of oil pump 2 are so the control of oil pump 2 rotating speeds is subjected to the impact of ECU (Electrical Control Unit) ECU7 driving voltage.Therefore, the control of oil pump 2 rotating speeds is exactly that control by the variation of ECU (Electrical Control Unit) ECU7 driving voltage realizes that 12V voltage drives corresponding 100% dutycycle, maximum speed control oil pump 2, and corresponding 0% dutycycle of 0V voltage, oil pump 2 is not worked.
ECU (Electrical Control Unit) ECU7 controls the rotating speed of oil pump 2 by the PI control algorithm, the ECU software inhouse is set up the model that control algorithm is arranged, the control algorithm of ECU software is divided into oil pressure P(proportional control) part algorithm and oil pressure I(integral control) part algorithm, and supportingly have oil pressure to regulate P-I part coefficient table, obtain P part accommodation coefficient and I part accommodation coefficient by tabling look-up;
As shown in Figure 3, the control algorithm of ECU software is:
(1) the oil pressure desired value deducts the oil pressure actual value that is detected by oil pressure sensor 9, obtains the pressure reduction between oil pressure actual value and the oil pressure desired value;
(2) calculating of oil pressure P part:
(2.1) table look-up by pressure reduction, obtain P part accommodation coefficient;
(2.2) P part regulating system multiply by pressure reduction, obtains P and partly regulates dutycycle (unrestricted value);
(2.3) P partly regulates dutycycle (unrestricted value) by maximum, minimum value restriction, obtains final oil pump control P part regulated quantity;
(3) calculating of oil pressure I part:
(3.1) pressure reduction is tabled look-up, and obtains I part accommodation coefficient as the K input of integrator;
(3.2) pressure reduction is as the input of integrator;
(3.3) ignition key OFF is as initialization condition, and initialization value composes 0;
(3.4) calculate through integrator, obtain I and partly regulate dutycycle (unrestricted value);
(3.5) I partly regulates dutycycle (unrestricted value) by maximum, minimum value restriction, obtains final oil pump control I part regulated quantity;
(4) by oil pressure sensor 9 feedback oil pressure actual value signals, by the closed loop control of PI logic control algorithm, can the oil pressure in the oily rail 4 be controlled in the target range accurately.
The above has carried out exemplary description to the present invention by reference to the accompanying drawings; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technological scheme carry out; or without improving design of the present invention and technological scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (4)
1. vehicle fuel method for controlling pump, it is characterized in that: oil pump is connected with oily rail by the pump oil pipe, be provided with the oil pressure sensor that is connected with ECU (Electrical Control Unit) ECU that detects oil pressure in the oily rail at oily rail, ECU (Electrical Control Unit) ECU directly is connected with oil pump, the running of control oil pump, ECU (Electrical Control Unit) ECU is built-in with default ECU software, in the ECU software and be preset with the oil pressure desired value;
Described controlling method adopts following steps:
(1) when ignition switch be ON, ECU (Electrical Control Unit) ECU sends a signal to oil pump, directly control oil pump begins full-speed operation, sets up oil pressure;
(2) oil pressure sensor begins to detect the oil pressure in the oily rail, and fuel injection pressure signal is passed to ECU (Electrical Control Unit) ECU;
(3) ECU (Electrical Control Unit) ECU judges according to the fuel injection pressure signal of oil pressure sensor transmission whether the oil pressure in the oily rail reaches the oil pressure desired value;
(4) oil pressure in oily rail does not reach the oil pressure desired value, returns step (1), and ECU (Electrical Control Unit) ECU control oil pump continues full-speed operation;
(5) oil pressure in oily rail reaches the oil pressure desired value, and ECU (Electrical Control Unit) ECU controls the rotating speed of oil pump by control algorithm, and the oil pressure in the oily rail is controlled in the oil pressure target range, keeps the stable of the interior oil pressure of oily rail.
2. vehicle fuel method for controlling pump according to claim 1, it is characterized in that: in described step (5), ECU (Electrical Control Unit) ECU controls the rotating speed of oil pump by the PI control algorithm.
3. vehicle fuel method for controlling pump according to claim 2 is characterized in that: the control algorithm of ECU software is divided into the algorithm of oil pressure P part and the algorithm of oil pressure I part, and supportingly has oil pressure to regulate P-I part coefficient table,
The control algorithm of ECU software is:
(1) the oil pressure desired value deducts the oil pressure actual value that is detected by oil pressure sensor, obtains the pressure reduction between oil pressure actual value and the oil pressure desired value;
(2) calculating of oil pressure P part:
(2.1) table look-up by pressure reduction, obtain P part accommodation coefficient;
(2.2) P part regulating system multiply by pressure reduction, obtains P and partly regulates dutycycle;
(2.3) P partly regulates dutycycle by maximum, minimum value restriction, obtains final oil pump control P part regulated quantity;
(3) calculating of oil pressure I part:
(3.1) pressure reduction is tabled look-up, and obtains I part accommodation coefficient as the K input of integrator;
(3.2) pressure reduction is as the input of integrator;
(3.3) ignition key OFF is as initialization condition, and initialization value composes 0;
(3.4) calculate through integrator, obtain I and partly regulate dutycycle;
(3.5) I partly regulates dutycycle by maximum, minimum value restriction, obtains final oil pump control I part regulated quantity;
(4) by oil pressure sensor feedback oil pressure actual value signal, by the closed loop control of PI logic control algorithm, can the oil pressure in the oily rail be controlled in the target range accurately.
4. according to claim 2 or 3 described vehicle fuel method for controlling pump, it is characterized in that: the proportional relation of the rotating speed of described oil pump and voltage, the control of pump speed is that the variation by ECU (Electrical Control Unit) ECU driving voltage realizes, corresponding 100% dutycycle of 12V driving voltage, it is the oil pump full-speed operation, corresponding 0% dutycycle of 0V driving voltage, namely oil pump is not worked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104225560A CN102943714A (en) | 2012-10-29 | 2012-10-29 | Automobile fuel pump control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104225560A CN102943714A (en) | 2012-10-29 | 2012-10-29 | Automobile fuel pump control method |
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| CN102943714A true CN102943714A (en) | 2013-02-27 |
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| CN2012104225560A Pending CN102943714A (en) | 2012-10-29 | 2012-10-29 | Automobile fuel pump control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564388A (en) * | 2013-10-28 | 2015-04-29 | 德尔福电子(苏州)有限公司 | Control system for oil pump of engine |
| CN104832293A (en) * | 2014-12-11 | 2015-08-12 | 北汽福田汽车股份有限公司 | Vehicle oil pumping amount adjusting method, fuel oil feeding system, oil pump adjuster and oil pump |
| CN113464303A (en) * | 2021-08-17 | 2021-10-01 | 安徽江淮汽车集团股份有限公司 | Engine fuel pressure control method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5237975A (en) * | 1992-10-27 | 1993-08-24 | Ford Motor Company | Returnless fuel delivery system |
| US7448363B1 (en) * | 2007-07-02 | 2008-11-11 | Buell Motorcycle Company | Fuel delivery system and method of operation |
-
2012
- 2012-10-29 CN CN2012104225560A patent/CN102943714A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5237975A (en) * | 1992-10-27 | 1993-08-24 | Ford Motor Company | Returnless fuel delivery system |
| US7448363B1 (en) * | 2007-07-02 | 2008-11-11 | Buell Motorcycle Company | Fuel delivery system and method of operation |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564388A (en) * | 2013-10-28 | 2015-04-29 | 德尔福电子(苏州)有限公司 | Control system for oil pump of engine |
| CN104832293A (en) * | 2014-12-11 | 2015-08-12 | 北汽福田汽车股份有限公司 | Vehicle oil pumping amount adjusting method, fuel oil feeding system, oil pump adjuster and oil pump |
| CN113464303A (en) * | 2021-08-17 | 2021-10-01 | 安徽江淮汽车集团股份有限公司 | Engine fuel pressure control method |
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Application publication date: 20130227 |