CN103437926B - A kind of guard method of fuel pump - Google Patents
A kind of guard method of fuel pump Download PDFInfo
- Publication number
- CN103437926B CN103437926B CN201310353782.2A CN201310353782A CN103437926B CN 103437926 B CN103437926 B CN 103437926B CN 201310353782 A CN201310353782 A CN 201310353782A CN 103437926 B CN103437926 B CN 103437926B
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- Prior art keywords
- fuel
- fuel pump
- car body
- body controller
- oil
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- 239000000446 fuel Substances 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000000295 fuel oil Substances 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 239000003921 oil Substances 0.000 description 26
- 239000002828 fuel tank Substances 0.000 description 5
- 238000010304 firing Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
The invention discloses a kind of guard method of fuel pump, it is characterized in that: described guard method is the fuel injection pressure signal that car body controller receives fuel level sensor, when fuel oil is very few or exhaust, car body controller controls cut-out of fuel pump; When by recovering oil-feeding points or rail pressure sensor value of feedback lower than restriction, car body controller controls fuel pump and resumes work.A guard method for fuel pump, owing to adopting above-mentioned method, the invention has the advantages that: 1, trapped fuel very little or fuel oil exhausts time control cut-out of fuel pump, contribute to fuel pump self-radiating, increase the service life; 2, protect under the state being in idling at motor, do not affect the normal traveling of automobile; 3, by the object that software simulating is protected, without the need to increasing any cost.<!--1-->
Description
Technical field
The present invention relates to car engine machine technology, particularly a kind of guard method of fuel pump.
Background technique
In Modern Car, have employed various different gasoline injection system, their fuel system is also different, but generally all electric fuel punp is housed.
The working principle of electric fuel punp, utilizes motor to drive corresponding oil pump device, thus constantly carries fuel oil to oil-fired system.Oil-fired system must keep certain pressure, and only in this way the fuel atomization effect of guarantee oil sprayer ejection is better, more easy firing.In engine operation process, the oil pressure that oil pump generally keeps continual work to ensure in oil-fired system, but when trapped fuel very little or fuel oil exhausts time, if during oil pump continuous firing, because fuel oil reduces the heat radiation of oil pump, greatly shorten the working life of oil pump, even may burn fuel pump.
For above-mentioned problem, trapped fuel very little or fuel oil exhausts time provide a kind of practicable method to protect fuel pump, extend its working life be prior art need solve problem.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of guard method of fuel pump, with reach trapped fuel very little or fuel oil exhausts time fuel pump is protected, extend the object in its working life.
For achieving the above object, technological scheme of the present invention is, a guard method for fuel pump, is characterized in that: described guard method is the fuel injection pressure signal that car body controller receives fuel level sensor, and when fuel oil is very few or exhaust, car body controller controls cut-out of fuel pump; When by recovering oil-feeding points or rail pressure sensor value of feedback lower than restriction, car body controller controls fuel pump and resumes work, thus realizes protecting fuel pump when motor is in the oil-break operating mode slided for a long time.
Described car body controller communicates with adopting CAN between fuel level sensor.
When described car body controller controls cut-out of fuel pump, ignition key need be in open mode.
When described car body controller controls cut-out of fuel pump, motor is in idling mode, and motor does not have fault, and engine failure lamp is in the state of turning off the light.
When described car body controller controls cut-out of fuel pump, battery tension is in normal working, is greater than limit value.
Described motor enters oil-break phase duration when being greater than restriction, and the car body controller party awarding the contract can control cut-out of fuel pump.
A guard method for fuel pump, owing to adopting above-mentioned method, the invention has the advantages that: 1, trapped fuel very little or fuel oil exhausts time control cut-out of fuel pump, contribute to fuel pump self-radiating, increase the service life; 2, protect under the state being in idling at motor, do not affect the normal traveling of automobile; 3, by the object that software simulating is protected, without the need to increasing any cost.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation;
Fig. 1 is the logical flow chart of the guard method of a kind of fuel pump of the present invention.
Embodiment
The effect of fuel pump is in the fuel pipe of oil sprayer by the fuel delivery that is stored in fuel tank.Fuel pump in early stage engine fuel oil system mostly is mechanical type, and present electric fuel punp is replaced.In addition, originally some are installed in the electric fuel punp outside fuel tank, consider the problems such as heat radiation, sound insulation and vapour lock, have also all been built into fuel tank.The working principle of electric fuel punp is identical with the working principle of electric water pump, utilizes motor to drive corresponding oil pump device, thus constantly carries fuel oil to oil-fired system.Know, oil-fired system must keep certain pressure, and only in this way the fuel atomization effect of guarantee oil sprayer ejection is better, more easy firing.But when after engine misses, the pressure of oil-fired system can be lost, once there is no residual pressure, be easy in pipeline when high temperature produce vapour lock.Like this when motor is reset, due to entrained air in oil-fired system, be difficult to ensure enough fuel oils, motor will be difficult to start.For this reason, in fuel pump, one-way valve is provided with.Like this when fuel pump shuts down, closed check valve, to maintain the residual pressure in fuel pipe, is convenient to resetting of motor.When ignition key is opened, can hear that vehicle rear transmits " drone " sound.Being to ensure that oil-fired system has enough pressure to pilot engine, allowing the electric fuel punp 2-3 that operates in advance set up oil pressure second.In order to prevent the oil outlet side pressure of electric fuel punp too high, have also been devised safety valve, like this once the fuel pressure of fuel pump conveying is too high, safety valve will be opened, and makes the fuel flow returns of overpressure to fuel tank.Work as engine start, as long as engine speed > minimum engine speed, then fuel pump continuous firing, until engine misses, fuel pump just quits work.
Between the engine continuous on-stream period that fuel oil is little, because of oil-break operating mode, oil sprayer stops oil spout, and motor does not now need fuel oil supply.So car load is slided for a long time or the long-time oil-break operating mode of lower long slope; fuel pump can be controlled by car body controller to shut down; fuel pump work is controlled by rail pressure or recovery oil-feeding points; not only ensure engine stabilizer running but also contribute to the heat radiation of fuel pump itself; better protection is played to fuel pump simultaneously, increase the service life.
The present invention be only directed to trapped fuel seldom or fuel oil exhausts time, during the oil-break of long period, car body controller controls fuel pump and quits work during this oil-break, and near recovery oil-feeding points, car body controller controls fuel pump and resumes work.
Communicated with CAN signal in car body controller by fuel level sensor signal, car body controller feedback oil pressure signal, carries out closed loop control to the working state of fuel pump.To complete in oil level signal and car body controller after CAN communication, when oil level signal and magnitude of voltage are less than limit value (fuel oil is little), car body controller carries out feedback regulation to fuel pump, judge that engine is in slide for a long time or the long-time oil-break operating mode of long descending, car body controller control oil pump quits work, get rid of the switching of the working state of the fast frequency of fuel pump that short time oil-break causes, ensure the normal working state of motor, by recovering oil-feeding points or rail pressure sensor feedback, car body controller controls fuel pump and to resume work state.
As shown in Figure 1, the present invention is the fuel injection pressure signal for car body controller reception fuel level sensor, and when fuel oil is very few or exhaust, car body controller controls cut-out of fuel pump; When by recovering oil-feeding points or rail pressure sensor value of feedback lower than restriction, car body controller controls fuel pump and resumes work, thus realizes protecting fuel pump when motor is in the oil-break operating mode slided for a long time.
CAN is adopted to communicate between car body controller with fuel level sensor, the general composition of fuel level sensor comprises sensing element: the element conversion element of energy direct feeling (or response) information measured (non electrical quantity) in sensor: the part change-over circuit that the impression of sensing element (or response) information can be converted into electrical signal in sensor: the electricity that sensor exports is changed into the useful electrical signal being convenient to show, record, process, control, also referred to as Signal Regulation and change-over circuit.Accessory power supply: for each element of sensor and circuit provide working power.Fuel level sensor is exactly the number that can sense oil mass in fuel tank, converts the oil mass sensed to electrical signal, CAN line in its electrical signal and car body controller is realized communication function by conversion element.Fuel level sensor realize with car body controller in after CAN communication, set up the control strategy of car body controller to oil pump, complete and the independence of fuel pump is controlled.
The oil level signal of fuel level sensor is for judging the situation that fuel oil is little, and by its signal feed back to car body controller, car body controller carries out closed loop control to fuel pump.
Ignition key is under keyon state, and storage battery gives car body controller and powers, and car body controller just can work under whole automatical control system, so keyon is the necessary condition of car body controller to oil pump control.Motor fault-free ensures normal working of engine, if when having fault, car body controller controls fuel pump when resuming work, if there is air inlet deviation, air fuel ratio may be partially rare and cause motor to be shaken or flame-out.Be all at idling operation during car body controller control oil sprayer oil-break, if motor enters non-idling operation, motor enters at once and recovers fuel feeding operating mode.Battery tension is too low, fuel pump charge oil pressure shakiness may be caused to cause motor unstable, so battery tension needs to be in normal working, be greater than limit value.When engine speed is greater than oil-break rotational speed limit, enter idling operation, car load will enter oil-break, is nominal situation oil-break or for long descending or long-time coasting mode oil-break, by being greater than limit value to distinguish to the endurance of oil-break operating mode for distinguishing.
Car body controller can judge the fuel pressure in oily rail according to rail pressure sensor, when rail pressure is lower than certain limit value, car body controller control oil pump work at once recovers fuel feeding.Otherwise may be excessively late because of recovery fuel feeding, the fuel injection quantity under fuel injection pulsewidth is less, causes air fuel ratio partially rare, and then causes car load to shake.If car load is without rail pressure sensor, motor can be utilized to recover oil-feeding points, car body controller controls fuel pump and resumes work.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the various improvement that technical solution of the present invention is carried out, or directly apply to other occasion, all within protection scope of the present invention without improving.
Claims (2)
1. a guard method for fuel pump, is characterized in that: described guard method is the fuel injection pressure signal that car body controller receives fuel level sensor, and when fuel oil is very few or exhaust, car body controller controls cut-out of fuel pump; When by recovering oil-feeding points or rail pressure sensor value of feedback lower than restriction, car body controller controls fuel pump and resumes work; When described car body controller controls cut-out of fuel pump, ignition key need be in open mode, when described car body controller controls cut-out of fuel pump, motor is in idling mode, and motor does not have fault, engine failure lamp is in the state of turning off the light, when described car body controller controls cut-out of fuel pump, battery tension is in normal working, be greater than limit value, described motor enters oil-break phase duration when being greater than restriction, and car body controller controls cut-out of fuel pump.
2. the guard method of a kind of fuel pump according to claim 1, is characterized in that: described car body controller communicates with adopting CAN between fuel level sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310353782.2A CN103437926B (en) | 2013-08-14 | 2013-08-14 | A kind of guard method of fuel pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310353782.2A CN103437926B (en) | 2013-08-14 | 2013-08-14 | A kind of guard method of fuel pump |
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| Publication Number | Publication Date |
|---|---|
| CN103437926A CN103437926A (en) | 2013-12-11 |
| CN103437926B true CN103437926B (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310353782.2A Active CN103437926B (en) | 2013-08-14 | 2013-08-14 | A kind of guard method of fuel pump |
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| CN (1) | CN103437926B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9555704B2 (en) * | 2014-07-17 | 2017-01-31 | Ford Global Technologies, Llc. | System and method for inhibiting engine operation during fueling |
| CN113357067B (en) * | 2021-06-24 | 2022-07-12 | 中国第一汽车股份有限公司 | Electric fuel pump control method and device, electronic equipment and storage medium |
| CN113685284B (en) * | 2021-08-24 | 2023-02-28 | 中国第一汽车股份有限公司 | Electric fuel pump control method, device, equipment and storage medium |
| CN116122979B (en) * | 2022-12-06 | 2024-08-13 | 中国第一汽车股份有限公司 | Vehicle pre-pumping oil control method and device, ECU and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2898335Y (en) * | 2005-08-08 | 2007-05-09 | 李义富 | Automatic inertial oil-interrupting energy saver of automobile |
| CN101255836A (en) * | 2008-04-08 | 2008-09-03 | 尤永前 | Supply method and system for intelligent control of gasoline engine fuel oil |
| CN101749158A (en) * | 2008-12-08 | 2010-06-23 | 福特环球技术公司 | High pressure fuel pump control for idle tick reduction |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100020282A (en) * | 2008-08-12 | 2010-02-22 | 주식회사 한국엔엠텍 | Control method of fuel pump |
| US8347867B2 (en) * | 2009-06-30 | 2013-01-08 | GM Global Technology Operations LLC | System and method for protecting engine fuel pumps |
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2013
- 2013-08-14 CN CN201310353782.2A patent/CN103437926B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2898335Y (en) * | 2005-08-08 | 2007-05-09 | 李义富 | Automatic inertial oil-interrupting energy saver of automobile |
| CN101255836A (en) * | 2008-04-08 | 2008-09-03 | 尤永前 | Supply method and system for intelligent control of gasoline engine fuel oil |
| CN101749158A (en) * | 2008-12-08 | 2010-06-23 | 福特环球技术公司 | High pressure fuel pump control for idle tick reduction |
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| Publication number | Publication date |
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| CN103437926A (en) | 2013-12-11 |
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