CN204677345U - The normally closed electronically controlled unit pump of double-action - Google Patents
The normally closed electronically controlled unit pump of double-action Download PDFInfo
- Publication number
- CN204677345U CN204677345U CN201520270121.8U CN201520270121U CN204677345U CN 204677345 U CN204677345 U CN 204677345U CN 201520270121 U CN201520270121 U CN 201520270121U CN 204677345 U CN204677345 U CN 204677345U
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- valve
- fuel
- oil circuit
- draining
- commutation
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- Withdrawn - After Issue
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Abstract
The purpose of this utility model is to provide double-action normally closed electronically controlled unit pump, comprises two peach cam, roller plunger, normal close type fuel regulator valve, fuel path selector valve and two outlet valve.Normal close type fuel regulator valve is arranged on above plunger, and fuel path selector valve is arranged on above normal close type fuel regulator valve, and normal close type fuel regulator valve is normally off when not powering on, and after powering on, draining oil circuit opened by draining cone valve.Normal close type fuel regulator valve can solve the supply problem of fuel oil in the situations such as motor power down.By the transformation to draining cone valve place fuel path, oil circuit is designed to ladder-type, changes the area of fuel pressure suffered by valve two ends, when solenoid valve breaks down, too high fuel pressure can push draining cone valve open, completes draining pressure relief.Improve stability and the Security of valve itself with protective gear normal close type fuel regulator valve, and then improve the reliability of the hydraulic pressure installation such as electronically controlled unit pump and oil sprayer, improve the stability that motor runs.
Description
Technical field
The utility model relates to a kind of fueling injection equipment, specifically motor fueling injection equipment.
Background technique
Along with the progress of human society, the development of Modern Engine is had to the dual-pressure in the face of energy crisis and environmental pollution bring, and motor emission standard improves constantly, and this makes development of engine must towards the direction of energy-saving and emission-reduction.And utilizing electronic control to realize having become the control of engine fuel injection system the developing trend of motor, electronically controlled unit pump technology is a kind of important technical.Electronically controlled unit pump is a kind of time-based control fuel injection system meeting motor Abgasgesetz and cost-effectiveness requirement, has that injection pressure is high, a flexible feature such as adjustable of injection timing.
Tradition electronically controlled unit pump adopts common normal-open electromagnetic valve to control fuel oil draining oil circuit, and when common normal-open electromagnetic valve does not power on, the draining oil circuit of valve is in normally open, and the fuel oil in monoblock pump flows back to fuel tank by draining oil circuit.After solenoid valve powers on, close draining oil circuit by electromagnetic force, the fuel oil after plunger pressurization flow to oil sprayer through normally open valve.But traditional electronically controlled unit pump exists following not enough: one, monoblock pump inefficiency, camshaft rotates a circle the oil supply function that can only complete an oil sprayer; Its two, if simple change cam profile is two peach cams, camshaft rotates a circle the fuel injection quantity of the more than one oil sprayer of supplied fuel oil, reduces causing the efficiency of engine fuel oil system; Its three, traditional electronically controlled unit pump, can only complete the controlling functions to single control valve, is difficult to meet motor requirement to fuel injection processes under different working condition; Its four, when solenoid valve failure cannot power on, draining oil circuit will be in open mode all the time, and normally open valve can not complete and control the function of fuel flow communication; Its five, if solenoid valve stuck in off position under, in valve, oil pressure can constantly raise, and causes harmful effect, cause other hydraulic pressure installation such as oil sprayer to be damaged to normally open valve and oil sprayer.Traditional electronically controlled unit pump working efficiency is lower in a word, and Security is poor, cannot meet engine operation stability, does not possess the ability of reacting in time to fault.
Summary of the invention
The purpose of this utility model is to provide to improve motor Economy, power character, stability and reliability, effectively can reduce the normally closed electronically controlled unit pump of double-action of noxious emission simultaneously.
The purpose of this utility model is achieved in that
The normally closed electronically controlled unit pump of the utility model double-action, is characterized in that: comprise two peach cam, roller plunger, normal close type fuel regulator valve, fuel path selector valve, two outlet valve, roller plunger comprises roller, plunger, piston spring, upper plug shell, lower plunger shell, roller is arranged on the lower end of lower plunger shell, the top of plunger is positioned in upper plug shell, the bottom of plunger is positioned in lower plunger shell, piston spring is set with outside plunger, the upper end portion of piston spring withstands on upper plug shell lower end, the lower end part of piston spring is in lower plunger shell, plunger cavity is formed between the inwall of plunger and upper plug shell, upper plug shell is arranged respectively oil inlet hole, draining oil circuit and the first oil circuit, plunger cavity is communicated with oil inlet hole and the first oil circuit, normal close type fuel regulator valve comprises control valve body, first electromagnetic valve body, solenoid valve valve rod, draining cone valve, solenoid valve valve rod, draining cone valve valve rod, control valve body and the first electromagnetic valve body are arranged in juxtaposition, draining cone valve, draining cone valve valve rod is arranged in control valve body, first electromagnetic valve body connects the first end of draining cone valve by solenoid valve valve rod, second end of draining cone valve is tapered end face, tapered end face coordinates with the control valve body on its side, draining cone valve valve rod first end connects the second end of draining cone valve, second end of draining cone valve valve rod withstands on draining cone valve spring, draining cone valve spring top is on the control valve body that it is other, solenoid valve valve rod is provided with solenoid valve spring, solenoid valve spring place is communicated with draining oil circuit, the second oil circuit communicated with the first oil circuit is set in control valve body, draining cone valve valve rod intersects mutually with the second oil circuit, fuel path selector valve comprises the second electromagnetic valve body, front commutation valve rod, commutation valve body, rear commutation valve rod, fuel path spacer block, commutation valve rod before second electromagnetic valve body connects, front commutation valve rod is connected with steel ball by front commutation valve rod little spring, steel ball withstands on commutation valve body, rear commutation valve rod is pressed on commutation valve body by spring, front commutation valve rod, front commutation valve rod little spring, steel ball, selector valve and rear commutation valve rod are all arranged in commutation housing, commutation housing is arranged on the second electromagnetic valve body, in commutation housing, the first fuel-displaced oil circuit is set, second fuel-displaced oil circuit, 3rd fuel-displaced oil circuit, first fuel-displaced oil circuit, second fuel-displaced oil circuit all communicates with the 3rd fuel-displaced oil circuit, in 3rd fuel-displaced oil circuit, fuel path spacer block is set, second oil circuit stretches in commutation housing, commutation valve body realizes communicating of the second oil circuit and the first fuel-displaced oil circuit or the second fuel-displaced oil circuit under the control of the second electromagnetic valve body, two outlet valve comprises the first outlet valve and the second outlet valve, and the first outlet valve is communicated with the first fuel-displaced oil circuit, and the second outlet valve is communicated with the second fuel-displaced oil circuit, two peach cam matches with roller.
The utility model can also comprise:
The part of 1, draining cone valve valve rod intersecting with the second oil circuit arranges the first compression face and the second compression face respectively, first compression face and the second compression face lay respectively at draining cone valve side and the draining cone valve spring side of the second oil circuit, and the area of the first compression face is not less than 1.2 times of the second compression face area.
2: each peach pair roller effect angular range of two peach cam is 80 ° ~ 110 °, and between two peaches, constant speed section angle is 100 ° ~ 70 °.
Advantage of the present utility model is: the double-action electronically controlled unit pump in this device can realize the function to two flexible fuel feeding of oil sprayer, two peach cam can be coordinated when camshaft rotates a circle to complete the function two oil sprayers being replaced to fuel feeding, effectively can improve the working efficiency of electronically controlled unit pump, improve engine efficiency, improve motor Economy, power character, effectively can reduce noxious emission.Fuel path selector valve in this device, can realize controlling the cooperation of two outlet valve oil circuit, electromagnetic valve fuel path selector valve can improve the speed of response of selector valve, can control the fuel feeding number of times of motor under different operating mode, different load, fuel feeding moment and fuel delivery flexibly.Fuel path selector valve also can realize the combination control of two outlet valve simultaneously, by changing electromagnetic valve signal, can realize outlet valve 27 outlet valve 28 that works and not working, outlet valve 28 outlet valve 27 that works does not work, two kinds of fuel system, thus improve the flexibility of monoblock pump.
This device also has following beneficial effect simultaneously: this device is when fuel regulator valve solenoid valve normally works, effectively can control fuel oil by the circulating rate of fuel regulator valve and currency, simultaneously by the control mode that fuel regulator valve solenoid valve is different can realize fuel flow communication amount and circulation moment flexible control.Injection system can be made to meet the demand of motor multi-operating mode and repeatedly fuel feeding by changing fuel regulator valve control signal, improving motor Economy, power character, effectively reducing noxious emission.This device fuel regulator valve is normal-closed electromagnetic valve, when its solenoid valve break down can not power on time, draining cone valve is in normally off, still can continue the function of fuel feeding, improves adaptability to changes and the working stability of motor in the situations such as motor power down.Simultaneously; this device fuel regulator valve is designed with protective measure; when solenoid valve break down can not power on time; or the hydraulic pressure installation such as oil sprayer connecting monoblock pump is when breaking down, draining cone valve is in normally off and normally closed solenoid valve internal pressure can be caused constantly to raise, but under the effect of protective measure; draining cone valve can open draining oil circuit; make fuel oil flow back to low-pressure reservoir, reduce the fuel pressure in whole system, the safety of protection oil-fired system.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is roller piston structure schematic diagram of the present utility model;
Fig. 3 a is normal close type fuel regulator valve structural representation of the present utility model, and Fig. 3 b is Fig. 3 a partial schematic diagram;
Fig. 4 a is fuel path structure of reversing valve schematic diagram of the present utility model, one of double mode schematic diagram of Fig. 4 b fuel path selector valve, the double mode schematic diagram two of Fig. 4 c fuel path selector valve;
Fig. 5 is of the present utility model pair of delivery valve structure schematic diagram;
Fig. 6 is of the present utility model pair of peach cam structure schematic diagram.；
Embodiment
Below in conjunction with accompanying drawing citing, the utility model is described in more detail:
Composition graphs 1 ~ 6, this device comprises two peach cam 1, roller plunger 2, normal close type fuel regulator valve 3, fuel path selector valve 4 and two outlet valve 5 and forms.Roller plunger 2 is arranged on bottom the pump housing 6, is made up of roller 7, plunger 8, piston spring 9, plunger cavity 10, oil inlet hole 11, oil circuit 12 and draining oil circuit 13.The top of plunger cavity 10 is provided with normal close type fuel regulator valve 3, comprises solenoid valve 14, solenoid valve valve rod 15, solenoid valve spring 16, draining cone valve coupling sleeve 17, draining cone valve 18 and draining cone valve spring 19.Fuel path selector valve 4 is arranged on above normal close type fuel regulator valve 3, and it comprises solenoid valve 22, front commutation valve rod 23, selector valve 24 and rear commutation valve rod 25, and fuel path spacer block 26.Two outlet valve 5 is arranged on pump housing top, is made up of outlet valve 27 and outlet valve 28.
The normally closed electronically controlled unit pump of double-action of the present utility model is made up of two peach cam 1, roller plunger 2, normal close type fuel regulator valve 3, fuel path selector valve 4 and two outlet valve 5.Roller plunger 2 is made up of roller 7, plunger 8, piston spring 9, plunger cavity 10, oil inlet hole 11, oil circuit 12 and draining oil circuit 13.When plunger 8 is descending, suck fuel oil from oil inlet hole 11, two peach cam 1 pushing rolling wheels 7 makes plunger 8 up, and after closing oil inlet hole 11, the fuel oil in compression plunger chamber 10, completes fuel oil pressurization function, and the fuel oil after compression flows into normal close type fuel regulator valve 3 by oil circuit 12.
Normal close type fuel regulator valve 3 comprises solenoid valve 14, solenoid valve valve rod 15, solenoid valve spring 16, draining cone valve coupling sleeve 17, draining cone valve 18 and draining cone valve spring 19.Solenoid valve 14 is connected with draining cone valve coupling sleeve 17 interference fit by solenoid valve valve rod 15 with draining cone valve 18.When normal close type fuel regulator valve does not power on, draining cone valve 18 be subject to solenoid valve spring 16 pretightening force F1, draining cone valve spring 19 pretightening force F2 and fuel pressure P make a concerted effort, solenoid valve spring 16 and draining cone valve spring 19 are all in compressive state, because solenoid valve spring 16 pretightening force F1 is greater than draining cone valve spring 19 pretightening force F2, i.e. F
1> F
2, so draining cone valve 18 is landed on the conical surface, the draining oil circuit of valve is in normally off, and in plunger cavity 10, fuel oil after compression flows into fuel path selector valve 4 through oil circuit L1.When solenoid valve 14 powers on, draining cone valve 15 is subject to electromagnetic force F3 that solenoid valve 14 produces, solenoid valve spring 16 spring force, the making a concerted effort of draining cone valve spring 19 spring force and fuel pressure P, now electromagnetic force F3 and draining initial tension of spring F2 make a concerted effort be greater than solenoid valve initial tension of spring F1, i.e. F
3+ F
2> F
1, solenoid valve valve rod 15 pairs of draining cone valve coupling sleeves 17 produce active force, and drive draining cone valve 18 to open draining oil circuit 13, fuel oil flows back to low-pressure reservoir.
Fuel path selector valve 4 comprises solenoid valve 22, front commutation valve rod 23, selector valve 24 and rear commutation valve rod 25, and fuel path spacer block 26.Front commutation valve rod 23 is controlled by solenoid valve 22, and valve rod front end is connected with a small ball by front commutation valve rod little spring, and small ball withstands on selector valve 24, and the valve rod 25 that commutates after the other end is connected with selector valve 24.Selector valve 25 upper end withstands on fuel path spacer block 26.When solenoid valve 22 is not energized, selector valve 24 left end contacts with fuel path spacer block 26 right-hand member, and open left side oil circuit and close right side oil circuit, as shown in Figure 4 b, now fuel oil enters an oil sprayer through outlet valve 27; When solenoid valve 22 is energized, selector valve 24 right-hand member contacts with the left end of fuel path spacer block 26, and open right side oil circuit and close left side oil circuit, as illustrated in fig. 4 c, now fuel oil enters an oil sprayer through outlet valve 28.Therefore, fuel path selector valve can realize two kinds of different fuel oil configuration supplies.The two peach cams utilizing the utility model to design, each peach pair roller effect angle ф 1 scope is 80 ° ~ 110 °, and between two peaches, constant speed section angle ф 2 is 100 ° ~ 70 °.Cam axle completes fuel feeding for one week function to two oil sprayers can be realized.
Normal close type fuel regulator valve 3 is when the situation solenoid valves 14 such as motor generation power down cannot power on, and draining cone valve is in normally off, still can continue the effect of fuel feeding, can improve the reliability of oil-fired system, improves engine operation stability.When the solenoid valve 14 of normal close type fuel regulator valve 3 break down cannot work time, draining oil circuit 13 cannot be opened, fuel oil constantly flows into oil sprayer by oil inlet hole 11, oil circuit 12, cause other hydraulic pressure installation fuel pressure such as normal close type fuel regulator valve and oil sprayer constantly to raise, may damage system.Therefore, normal close type fuel regulator valve is designed with safety protection device.The fuel pressure compression face of draining cone valve 18 is made up of compression face 20 and compression face 21.In traditional fuel regulator valve open in usual, these two compression face areas are identical, the hydraulic coupling balanced.The fuel path at draining conical surface place is designed to stepped shaft by normal close type fuel regulator valve, increases the area of compression face 20, makes the area ratio of the area of itself and compression face 21 be greater than 1.2.The pressure F at compression face 20 place
20> 1.2F
21, when fuel pressure increases to a certain degree, F
20+ F
2> F
21+ F
1, the pressure at compression face 20 place will make draining cone valve 18 open, and fuel oil flows back into low-pressure reservoir through draining oil circuit 13, and intrasystem fuel pressure is reduced, and protects the safety of normally close valve and other hydraulic pressure installation.
The normally closed electronically controlled unit pump of a kind of double-action of the utility model, comprises two peach cam 1, roller plunger 2, normal close type fuel regulator valve 3, fuel path selector valve 4 and two outlet valve 5.The normally closed electronically controlled unit pump of double-action, installs roller plunger 2 bottom it, install normal close type fuel regulator valve 3, fuel path selector valve 4 above roller plunger 2 successively, and two outlet valve 5 is installed at top.Normal close type fuel regulator valve, comprising: solenoid valve 14, solenoid valve valve rod 15, solenoid valve spring 16, draining cone valve coupling sleeve 17, draining cone valve 18 and draining cone valve spring 19.Solenoid valve 14 is connected with draining cone valve coupling sleeve 17 interference fit by solenoid valve valve rod 15 with draining cone valve 18.Be in normally off when it does not power on, open draining oil circuit 13 by control draining cone valve 18 after powering on and complete draining.Normal close type fuel regulator valve, the fuel path at its draining conical surface place is designed to stepped shaft, increases the area of compression face 20, makes the area ratio of the area of itself and compression face 21 be greater than 1.2.When fuel pressure is excessive, the stressed draining cone valve of opening of difference that the different lifting surface area in two ends causes completes draining, protective system Security.Fuel path selector valve, it is equipped with solenoid valve 22, front commutation valve rod 23, selector valve 24 and rear commutation valve rod 25, and fuel path spacer block 26.When solenoid valve 22 is not energized, open left side oil circuit and close right side oil circuit, fuel oil enters an oil sprayer through outlet valve 27; Solenoid valve 22 is energized, and open right side oil circuit and close left side oil circuit, fuel oil enters an oil sprayer through outlet valve 28.The normally closed electronically controlled unit pump of double-action, its cam is two peach cams, each peach pair roller effect angle ф
1scope is 80 ° ~ 110 °, constant speed section angle ф between two peaches
2it is 100 ° ~ 70 °.Controlling selector valve by solenoid valve 22 realizes the free adjusting of fuel path and configuration, within one week, completes function to two flexible fuel feeding of oil sprayer to realize cam axle.
Normal close type fuel regulator valve is normally off when not powering on, and after powering on, draining oil circuit opened by draining cone valve.Normal close type fuel regulator valve can solve the supply problem of fuel oil in the situations such as motor power down.By the transformation to draining cone valve place fuel path, oil circuit is designed to ladder-type, changes the area of fuel pressure suffered by valve two ends, when solenoid valve breaks down, too high fuel pressure can push draining cone valve open, completes draining pressure relief.Improve stability and the Security of valve itself with protective gear normal close type fuel regulator valve, and then improve the reliability of the hydraulic pressure installation such as electronically controlled unit pump and oil sprayer, improve the stability that motor runs.Fuel path selector valve controls fuel oil and flows to, and can switch fuel path fast, can realize two kinds of oil circuit configurations fast, and then realize the function of two outlet valve alternations by controlling fuel path selector valve.By the cooperation of fuel oil Controlling solenoid valve and fuel path selector valve, the size and the form that change electromagnetic force can realize different fuel feeding moment and supply time.Utilizing the two peach cams designed by the utility model can realize cam angle rotates a circle to the function of two flexible fuel feeding of oil sprayer, effectively can improve the working efficiency of electronically controlled unit pump, improve engine efficiency, meet the fuel feeding number of times of motor under different operating mode, different load, charge oil pressure and fuel delivery needs, improve motor Economy, power character, effectively reduce noxious emission.
Claims (3)
1. the normally closed electronically controlled unit pump of double-action, is characterized in that: comprise two peach cam, roller plunger, normal close type fuel regulator valve, fuel path selector valve, two outlet valve, roller plunger comprises roller, plunger, piston spring, upper plug shell, lower plunger shell, roller is arranged on the lower end of lower plunger shell, the top of plunger is positioned in upper plug shell, the bottom of plunger is positioned in lower plunger shell, piston spring is set with outside plunger, the upper end portion of piston spring withstands on upper plug shell lower end, the lower end part of piston spring is in lower plunger shell, plunger cavity is formed between the inwall of plunger and upper plug shell, upper plug shell is arranged respectively oil inlet hole, draining oil circuit and the first oil circuit, plunger cavity is communicated with oil inlet hole and the first oil circuit, normal close type fuel regulator valve comprises control valve body, first electromagnetic valve body, solenoid valve valve rod, draining cone valve, solenoid valve valve rod, draining cone valve valve rod, control valve body and the first electromagnetic valve body are arranged in juxtaposition, draining cone valve, draining cone valve valve rod is arranged in control valve body, first electromagnetic valve body connects the first end of draining cone valve by solenoid valve valve rod, second end of draining cone valve is tapered end face, tapered end face coordinates with the control valve body on its side, draining cone valve valve rod first end connects the second end of draining cone valve, second end of draining cone valve valve rod withstands on draining cone valve spring, draining cone valve spring top is on the control valve body that it is other, solenoid valve valve rod is provided with solenoid valve spring, solenoid valve spring place is communicated with draining oil circuit, the second oil circuit communicated with the first oil circuit is set in control valve body, draining cone valve valve rod intersects mutually with the second oil circuit, fuel path selector valve comprises the second electromagnetic valve body, front commutation valve rod, commutation valve body, rear commutation valve rod, fuel path spacer block, commutation valve rod before second electromagnetic valve body connects, front commutation valve rod is connected with steel ball by front commutation valve rod little spring, steel ball withstands on commutation valve body, rear commutation valve rod is pressed on commutation valve body by spring, front commutation valve rod, front commutation valve rod little spring, steel ball, selector valve and rear commutation valve rod are all arranged in commutation housing, commutation housing is arranged on the second electromagnetic valve body, in commutation housing, the first fuel-displaced oil circuit is set, second fuel-displaced oil circuit, 3rd fuel-displaced oil circuit, first fuel-displaced oil circuit, second fuel-displaced oil circuit all communicates with the 3rd fuel-displaced oil circuit, in 3rd fuel-displaced oil circuit, fuel path spacer block is set, second oil circuit stretches in commutation housing, commutation valve body realizes communicating of the second oil circuit and the first fuel-displaced oil circuit or the second fuel-displaced oil circuit under the control of the second electromagnetic valve body, two outlet valve comprises the first outlet valve and the second outlet valve, and the first outlet valve is communicated with the first fuel-displaced oil circuit, and the second outlet valve is communicated with the second fuel-displaced oil circuit, two peach cam matches with roller.
2. the normally closed electronically controlled unit pump of double-action according to claim 1, it is characterized in that: the part that draining cone valve valve rod intersects with the second oil circuit arranges the first compression face and the second compression face respectively, first compression face and the second compression face lay respectively at draining cone valve side and the draining cone valve spring side of the second oil circuit, and the area of the first compression face is not less than 1.2 times of the second compression face area.
3. the normally closed electronically controlled unit pump of double-action according to claim 1 and 2, is characterized in that: each peach pair roller effect angular range of two peach cam is 80 ° ~ 110 °, and between two peaches, constant speed section angle is 100 ° ~ 70 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520270121.8U CN204677345U (en) | 2015-04-30 | 2015-04-30 | The normally closed electronically controlled unit pump of double-action |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520270121.8U CN204677345U (en) | 2015-04-30 | 2015-04-30 | The normally closed electronically controlled unit pump of double-action |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204677345U true CN204677345U (en) | 2015-09-30 |
Family
ID=54177041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520270121.8U Withdrawn - After Issue CN204677345U (en) | 2015-04-30 | 2015-04-30 | The normally closed electronically controlled unit pump of double-action |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204677345U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806405A (en) * | 2015-04-30 | 2015-07-29 | 哈尔滨工程大学 | Double-acting normally closed electronic unit pump |
| CN108374740A (en) * | 2018-01-29 | 2018-08-07 | 中国第汽车股份有限公司 | A kind of cam and oil feed pump plunger driving device for driving fuel feeding pump plunger |
-
2015
- 2015-04-30 CN CN201520270121.8U patent/CN204677345U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806405A (en) * | 2015-04-30 | 2015-07-29 | 哈尔滨工程大学 | Double-acting normally closed electronic unit pump |
| CN108374740A (en) * | 2018-01-29 | 2018-08-07 | 中国第汽车股份有限公司 | A kind of cam and oil feed pump plunger driving device for driving fuel feeding pump plunger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150930 Effective date of abandoning: 20170412 |