CN101545427A - Controllable electronic control low-pressure oil supply device - Google Patents
Controllable electronic control low-pressure oil supply device Download PDFInfo
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- CN101545427A CN101545427A CN200910071968A CN200910071968A CN101545427A CN 101545427 A CN101545427 A CN 101545427A CN 200910071968 A CN200910071968 A CN 200910071968A CN 200910071968 A CN200910071968 A CN 200910071968A CN 101545427 A CN101545427 A CN 101545427A
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Abstract
The invention provides a controllable electronic control low-pressure oil supply device, which comprises a pump box 2, a pump body 3, an oil transfer pump 1 and a low-pressure oil passage. An oil inlet passage 6 is connected with an oil inlet opening 4, and an oil return passage 8 is connected with an oil return opening 10. The oil supply device is characterized in that the oil return passage 8 is provided with a low pressure sensor 7, the oil return opening 10 is provided with an oil return electromagnetic valve 9, the low pressure sensor 7 and the oil return electromagnetic valve 9 are connected with an electronic control unit, the low pressure sensor 7 transmits signals to the electronic control unit, and the electronic control unit looks up a related map according to the working condition to acquire an optimal low pressure under the working condition so as to control the oil return electromagnetic valve 7 to adjust an oil return circulation area. In a low-pressure oil passage system which can ensure low pressure, ensures sufficient oil absorption and does not generate gas cavity in a whole working condition range, the controllable electronic control low-pressure oil supply device can control the pressure of a low-pressure oil passage in real time so as to meet the requirement of different engine types and working conditions on the low pressure.
Description
(1) technical field
The present invention relates to a kind of low-pressure oil supply device of diesel oil electric-controlled injection device.Especially relate to the low-pressure oil supply device that is used on the automatically controlled time-based control diesel injection of the diesel engine device.
(2) background technique
Based on automatically controlled time-based control diesel injection device is the product that integrates machine, liquid, electromagnetism.By electronic control unit ECU injection process is controlled in the control of solenoid valve.Its hydraulic part comprises low-pressure oil supply system and high-pressure oil passage system.Low-pressure oil supply system is meant the component that comprise oil transfer pump, low pressure pump box, scavenger valve.The low-pressure oil supply system pressure size based on time control electronic fuel injection device of prior art is all regulated by scavenger valve spring rate and oil transfer pump flow, under whole working condition, low pressure oil supply pressure is generally on the low side, and can't take into account the high and low rotating speed operating mode demand different to low pressure.During the high engine speeds operation, the plunger downstream rate is than very fast, if the pressure of low pressure oil circuit is low, the fuel oil volume that enters plunger cavity from the low pressure oil circuit does not replenish the descending volume of vacating of plunger, and at this moment, negative pressure will appear in plunger head, and then can produce bubble.Very fast when often causing fuel oil to suck plunger cavity by the velocity ratio of valve stem seal face, in this case, because of its fuel oil static pressure ratio lower, when reaching the saturation vapour pressure of fuel oil, the air of dissolving fuel oil the inside will overflow rapidly, and also can there be the possibility of vaporization in fuel oil, thereby causes high-pressure oil passage cavitation to occur in injection process, and then influences the power output of motor and the life-span of high-pressure oil pipe and injection apparatus.Cavitation can produce many adverse consequencess, as destroying mobile performance, has a strong impact on the fuel injection characteristic of product and the conformity of circulating fuel injection quantity, the association cavitation erosion, the corrosion of mechanical damage and chemistry takes place, and with damage parts, also can produce strong vibration noise.Motor is when starting, and rotating speed is low, if low pressure is low excessively, it is elongated that fuel oil is full of time of oil circuit, unfavorable to the startup of motor, especially cold start-up.Because high low pressure is the interactional system of coupling, the different type of machines motor is owing to the difference that requires of rotating speed and power range, fuel delivery to low service system requires different, therefore, for the performance and the working life of improving injection system, must guarantee that the low pressure oil circuit all has enough pressure under whole working condition.
(3) summary of the invention
The object of the present invention is to provide a kind ofly can guarantee all that oil suction fully reaches at the low pressure in the whole working condition scope and do not produce air pocket, can satisfy different engine models, operating mode controllable electronic control low-pressure oil supply device the requirement of low pressure.
The object of the present invention is achieved like this:
It comprises pump box 2, be assemblied in the pump housing 3 in the pump box 2, oil transfer pump 1, by oil transfer pump 1, pump chamber 5, in-line 6, oil circuit 8 constitutes the low pressure oil circuit, in-line 6 is connected with filler opening 4, oil circuit 8 is connected with return opening 10, low-pressure sensor 7 is installed on oil circuit 8, return opening 10 places install back solenoid 9, low-pressure sensor 7 links to each other with electronic control unit with oil return solenoid valve 9, and low-pressure sensor 7 is passed to electronic control unit with signal, and electronic control unit is searched relevant map according to operating mode, obtain best low pressure under this operating mode, control oil return solenoid valve 7 is adjusted the oil return circulation area.
The objective of the invention is the requirement to low service system at prior art mesohigh system, provide a kind of and can guarantee that all oil suction fully reaches the low pressure oil-way system that does not produce air pocket at the low pressure in the whole working condition scope, pressure to the low pressure oil circuit is controlled in real time, satisfies the requirement to low pressure of different engine models, operating mode.
The present invention has following beneficial effect:
The present invention installs the electromagnetism scavenger valve in the low pressure pump tank drainback place of time-based control diesel injection system, do not change original low pressure oil circuit, under the constant situation of fuel delivery, regulate recirculating oil quantity by the aperture of regulating solenoid valve, and then adjusting low pressure, by demarcating, can obtain low pressure map best under each operating mode, be controlled by an electronic control unit the aperture of solenoid valve, reach best low pressure, abundant to guarantee the oil suction in the whole working condition scope, farthest reduce cavitation, solve the power output that influences motor, the problems such as life-span of high-pressure oil pipe and injection apparatus; Fuel oil enters pump box through oil transfer pump from in-line, obtain the best aperture of solenoid valve under the corresponding operating mode by searching low pressure map, under this operating mode, solenoid valve remains this aperture, it is certain that thereby recirculating oil quantity keeps, and can reduce the pressure surge to the low pressure oil circuit of each cylinder oil spout and draining, keeps low pressure stable, make the oil absorption unanimity in every cylinder working process, keep the conformity of circulating fuel injection quantity.
The present invention is used for the truck of various configuration electric-controlled injection devices, engineering machinery, generator set, electronic controlled diesel injection systems such as military diesel engine and Ship Power Equipment especially relate to the low-pressure oil supply system that is used on the automatically controlled time-based control diesel injection of the diesel engine device.
(4) description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1.
(5) embodiment
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
In conjunction with Fig. 1 and Fig. 2, be assemblied in the electric-controlled injection monoblock pump or the automatically controlled unipump pump housing 3 in the pump box 2, be shaped on low-voltage fuel filler opening 4 and return opening 10, low-pressure sensor 7, oil return solenoid valve 9 usually.Oil transfer pump 1 plays from the fuel tank pumping effect, and fuel oil enters pump box 2 through filler opening 4, and wherein a part enters high-pressure system through pump chamber 5, and major part also will be got back in the fuel tank through return opening 10.Oil transfer pump 1, pump chamber 5, in-line 6, oil circuit 8, oil return solenoid valve 9 is formed the low pressure oil-way system.Generally, the Flow characteristics of oil transfer pump 1 is fixed, therefore the pressure of low service system is mainly determined by oil return solenoid valve aperture size adjustment, promptly by oil return solenoid valve 9 controls, in the traditional mechanical scavenger valve, the amount of deformation that fuel oil pressure spring in the low service system is adjusted spring increases or reduces recirculating oil quantity, can't obtain guaranteeing that oil suction fully and reduce the best low pressure of air pocket.Present embodiment installs back solenoid on the low pressure pump box, pressure to low service system is carried out automatically controlled, solenoid valve can require to make rapidly response to the low pressure transient state, adjust low pressure to the optimum state, abundant to guarantee oil suction, keep the conformity of circulating fuel injection quantity, effectively reduced the generation of cavitation again.
Working principle of the present invention is: this electronic control low-pressure system will demarcate, and obtains low pressure map best under each operating mode.What solenoid valve was regulated is the circulation area of return opening 10, when motor changes operating mode, low-pressure sensor 7 is passed to electronic control unit with signal, and automatically controlled control unit is searched relevant map according to operating mode, obtains best low pressure under this operating mode, control electromagnetic valve is adjusted the oil return circulation area, adjust low pressure in real time, make each cylinder oil suction abundant, keep the conformity and the uniformity of circulating fuel injection quantity, avoid cavitation to produce, improve injection system working life; Simultaneously, accurately control recirculating oil quantity and can reduce demand, in the working life of improving oil transfer pump 1, reduce cost oil transfer pump 1 pump oil characteristic.
Claims (1)
1, a kind of controllable electronic control low-pressure oil supply device, it comprises pump box (2), be assemblied in the pump housing (3) in the pump box (2), oil transfer pump (1), by oil transfer pump (1), pump chamber (5), in-line (6), oil circuit (8) constitutes the low pressure oil circuit, in-line (6) is connected with filler opening (4), oil circuit (8) is connected with return opening (10), it is characterized in that: low-pressure sensor (7) is installed on oil circuit (8), return opening (10) locates to install back solenoid (9), low-pressure sensor (7) links to each other with electronic control unit with oil return solenoid valve (9), low-pressure sensor (7) is passed to electronic control unit with signal, electronic control unit is searched relevant map according to operating mode, obtains best low pressure under this operating mode, and control oil return solenoid valve (7) is adjusted the oil return circulation area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910071968A CN101545427A (en) | 2009-05-07 | 2009-05-07 | Controllable electronic control low-pressure oil supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910071968A CN101545427A (en) | 2009-05-07 | 2009-05-07 | Controllable electronic control low-pressure oil supply device |
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| Publication Number | Publication Date |
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| CN101545427A true CN101545427A (en) | 2009-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910071968A Pending CN101545427A (en) | 2009-05-07 | 2009-05-07 | Controllable electronic control low-pressure oil supply device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114753993A (en) * | 2022-03-25 | 2022-07-15 | 江铃汽车股份有限公司 | Noise reduction method and system for automobile oil pump |
| CN115467767A (en) * | 2022-08-15 | 2022-12-13 | 北京理工大学 | Device for weakening pressure interference between pumps |
-
2009
- 2009-05-07 CN CN200910071968A patent/CN101545427A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114753993A (en) * | 2022-03-25 | 2022-07-15 | 江铃汽车股份有限公司 | Noise reduction method and system for automobile oil pump |
| CN115467767A (en) * | 2022-08-15 | 2022-12-13 | 北京理工大学 | Device for weakening pressure interference between pumps |
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Application publication date: 20090930 |