CN2497071Y - Monoblock fuel-injection pump for diesel engine - Google Patents
Monoblock fuel-injection pump for diesel engine Download PDFInfo
- Publication number
- CN2497071Y CN2497071Y CN 01247930 CN01247930U CN2497071Y CN 2497071 Y CN2497071 Y CN 2497071Y CN 01247930 CN01247930 CN 01247930 CN 01247930 U CN01247930 U CN 01247930U CN 2497071 Y CN2497071 Y CN 2497071Y
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- CN
- China
- Prior art keywords
- diesel engine
- valve
- injection pump
- outlet valve
- pump
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Fuel-Injection Apparatus (AREA)
Abstract
The utility model provides a single unit fuel injection pump in the diesel engine, and includes a pump body, a plunger and barrel assembly and a fuel outlet valve. An idler wheel mechanism is arranged on the underside of the pump body and is inserted in a cam case of the diesel engine. The plunger and barrel assembly is arranged in the middle part of the pump body, the fuel outlet valve is arranged on the upside of the pump body, and the fuel outlet valve is isobaric. Adopting the isobaric fuel outlet valve, the single unit fuel injection pump in the diesel engine can avoid the secondary injection and the irregular injection, and the fuel injection pump is designed to be the single unit pump structure with an idler wheel mechanism inserted directly, so that the installation is convenient, as well as the structure is compact.
Description
The utility model belongs to the diesel fuel injection system technical field, is specifically related to a kind of diesel engine monomer Injection Pump that uses in high-power, high-speed diesel engine fuel injection system.
Fuel injection system is the critical component of diesel engine, have the title of diesel engine heart, and its quality directly has influence on the performance of diesel engine, and Injection Pump is exactly one of vitals in the fuel injection system.Now, what the Injection Pump of diesel engine generally adopted is to wait to hold outlet valve, the oil spout pump structure is that the pump housing is equipped with etc. and holds the oil pump that outlet valve and plunger coupled parts are formed, and the bottom roller mechanism be separately an one, and roller mechanism need could be connected with the camshaft realization in the cam box by other transmission housing.Along with the reinforcing degree of diesel engine is more and more higher, the Injection Pump structure of existing diesel has the following disadvantages: the one, under various operating modes, since etc. the appearance outlet valve can not control the variation of the residual pressure in the high-pressure oil pipe, secondary injection and the unsettled phenomenon of low operating mode can appear in diesel engine, bring thus that oil consumption is big, discharge amount is big and a series of problems such as noise pollution is serious, the diesel engine working condition is worsened, can not be suitable for fully the reinforced diesel engine; The 2nd, pump body structure is huge, installs inconvenient.
The purpose of this utility model just is to overcome the deficiency that prior art exists, a kind of diesel engine monomer Injection Pump is provided, adopt constant pressure delivery valve to avoid producing secondary injection and disorder-injection, and Injection Pump is designed to monoblock pump structure with roller mechanism card edge type.
The technical solution of the utility model is as follows:
Diesel engine monomer Injection Pump comprises the pump housing, plunger coupled parts and outlet valve, it is characterized in that roller mechanism is equipped with in the bottom in the pump housing, directly insert in the cam box of diesel engine, plunger coupled parts is equipped with at the middle part in the pump housing, and outlet valve is equipped with on top, and outlet valve is a constant pressure delivery valve.
Establish the pressure oil duct and the release oil duct that lead to the high-pressure oil pipe that connects Injection Pump and oil sprayer in the valve seat of described constant pressure delivery valve, pressure oil road oil outlet end is established the outlet valve that is made of steel ball and several spring seats of spring, and release oil duct emptying end is established the reduction valve that is made of steel ball and spring and spring seat.Release oil duct and reduction valve connecting place are established throttle orifice, and throttle orifice is the passage less than the release oil duct.
Describe present technique in detail below in conjunction with drawings and Examples:
Fig. 1 is a diesel engine monomer Injection Pump structure sectional view;
The constant pressure delivery valve structure sectional view of Fig. 2 for adopting among Fig. 1.
Embodiment: referring to Fig. 1, this diesel engine monomer Injection Pump has the holistic pump housing 3, constant pressure delivery valve 9, plunger coupled parts and roller mechanism 2 from top to bottom are housed in the pump housing 3 successively, the piston spring 4 that is installed on the roller mechanism 2 is used for resetting of plunger 5, be close to mutually to guarantee roller 1 and cam, make plunger 5 carry out work, guarantee the stability of roller mechanism 2 by the characteristics of motion that cam profile provided.Roller mechanism 2 is installed on the bottom in the pump housing 3, installs with four bolts hole of Oil pump flange, oil pump directly can be inserted in the diesel engine cam case.Going out, unloading of plunger 5 tops and constant pressure delivery valve 9 forms pressure oil cavity 7 between oil duct 11 and 12, plunger bushing 6 upper chambers walls are provided with into, spill port 13 and 14, when plunger 5 moves upward, sealed that plunger bushing 6 advances, when spill port 13 and 14 top edges, oil pump promptly begins fuel feeding.The structure of constant pressure delivery valve 9 is referring to Fig. 2, adopt two steel ball sealing formula structures, establish pressure oil duct 18 and release oil duct 20 in the valve seat 19 of constant pressure delivery valve towards high-voltage tube, pressure oil duct 18 oil outlet ends are established the outlet valve 10 that is made of steel ball 15 and spring 16 and spring seat 17, and release oil duct 20 emptying ends are established the reduction valve 8 that is made of steel ball 22 and spring 23 and spring seat 24.Release oil duct 20 is established throttle orifice 21 with reduction valve 8 connecting places, and throttle orifice 21 is the passage less than release oil duct 20.
This injection pump plunger is driven through direct-insert roller mechanism by the diesel engine fuel oil camshaft, and they are reciprocating with a constant total travel.In the plunger delivery stroke, outlet valve is being opened, and fuel oil flows to oil sprayer through the pressure oil duct with high-pressure oil pipe (pipeline that promptly is connected oil pump and oil sprayer), and this moment, reduction valve kept closed condition.During end of injection, outlet valve is owing to the oil pressure effect in spring force and the high-pressure oil pipe is closed.Reduction valve is opened by the residual pressure in the high-pressure oil pipe, and the pressure in the high-pressure oil pipe is descended rapidly, thereby guarantees that oil-fuel injector needle-valve closes rapidly, prevents that fuel drop out from going into the firing chamber, has effectively avoided secondary injection and disorder-injection.
The utility model has the advantages that:
1. adopted constant pressure delivery valve, avoided secondary injection and low operating mode instability, made the fuel injector spray Injection pressure improves, thereby has brought the reduction of oil consumption, and is alleviating discharging, reducing that effect shows aspect the noise Work.
2. in the whole pump housing of injection pump, it is protruding directly to be inserted into diesel engine with the idler wheel mechanism design for this structure In the roller box, easy for installation, compact conformation.
Claims (3)
1. diesel engine monomer Injection Pump comprises the pump housing, plunger coupled parts and outlet valve, it is characterized in that roller mechanism is equipped with in the bottom in the pump housing, directly insert in the cam box of diesel engine, plunger coupled parts is equipped with at the middle part in the pump housing, and outlet valve is equipped with on top, and outlet valve is a constant pressure delivery valve.
2. diesel engine monomer Injection Pump according to claim 1, it is characterized in that establishing in the valve seat of constant pressure delivery valve pressure oil duct and the release oil duct that leads to the high-pressure oil pipe that connects Injection Pump and oil sprayer, pressure oil road oil outlet end is established the outlet valve that is made of steel ball and spring and spring seat, and release oil duct emptying end is established the reduction valve that is made of steel ball and spring and spring seat.
3. diesel engine monomer Injection Pump according to claim 1 is characterized in that release oil duct and reduction valve connecting place establish throttle orifice, and throttle orifice is the passage less than the release oil duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01247930 CN2497071Y (en) | 2001-10-19 | 2001-10-19 | Monoblock fuel-injection pump for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01247930 CN2497071Y (en) | 2001-10-19 | 2001-10-19 | Monoblock fuel-injection pump for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2497071Y true CN2497071Y (en) | 2002-06-26 |
Family
ID=33658685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01247930 Expired - Lifetime CN2497071Y (en) | 2001-10-19 | 2001-10-19 | Monoblock fuel-injection pump for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2497071Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370465A (en) * | 2015-12-11 | 2016-03-02 | 中国北方发动机研究所(天津) | Deformable compensation type high-pressure variable pump plunger |
-
2001
- 2001-10-19 CN CN 01247930 patent/CN2497071Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370465A (en) * | 2015-12-11 | 2016-03-02 | 中国北方发动机研究所(天津) | Deformable compensation type high-pressure variable pump plunger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHONGQING HONGJIANG MACHINE CO., LTD. Free format text: FORMER NAME OR ADDRESS: HONGJIANG MACHINERY FACTORY, CHONGQING |
|
| CP03 | Change of name, title or address |
Address after: No. 190 Qingcheng Road, Yongchuan District, Chongqing, China: 402162 Patentee after: Chongqing Hongjiang Machinery Co., Ltd. Address before: No. 190 Qingcheng Road, Chongqing, Yongchuan: 402162 Patentee before: Chongqing Hongjiang Machine Works |
|
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: Third Chongqing Road, Yongchuan District No. 404, zip code: 402162 Patentee after: Chongqing Hongjiang Machinery Co., Ltd. Address before: No. 190 Qingcheng Road, Yongchuan District, Chongqing, China: 402162 Patentee before: Chongqing Hongjiang Machinery Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20111019 Granted publication date: 20020626 |