CN2903453Y - Constant pressure oil outlet valve of diesel engine oil injection pump - Google Patents
Constant pressure oil outlet valve of diesel engine oil injection pump Download PDFInfo
- Publication number
- CN2903453Y CN2903453Y CN 200520125027 CN200520125027U CN2903453Y CN 2903453 Y CN2903453 Y CN 2903453Y CN 200520125027 CN200520125027 CN 200520125027 CN 200520125027 U CN200520125027 U CN 200520125027U CN 2903453 Y CN2903453 Y CN 2903453Y
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- fuel
- valve
- delivery valve
- valve body
- injection pump
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Abstract
The utility model discloses a constant pressure delivery valve for the injection pump of the diesel, comprising a delivery valve body and a delivery valve seat which are engaged or disengaged to control the disconnection or the connection of the fuel line, an injection valve nut, a volume reduction device arranged in the inner cavity of the injection valve nut, and a delivery valve spring clamped between the volume reduction device and the delivery valve body in the axial direction. A first one-way valve comprises the delivery valve body, the delivery valve seat, the delivery valve spring and the volume reduction device, wherein the delivery valve body is provided with an internal cavity which is communicated with the fuel line and provided with a second one-way valve opened reverse to the first one-way valve. After finishing the fuel supply to the injection pump, the delivery valve can keep the fuel pressure in the fuel injection pipe at a constant positive value, thereby not only preventing the fuel injector from imperfect injection to improve the fuel economy, but also avoiding the gas rushing reversely to the high-pressure cavity of the injection pump or else the resulting fuel short-circuit may lead to the flameout and hard-to-start of the engine.
Description
Technical field
The utility model relates to a kind of outlet valve of diesel injection pump.
Background technique
The known grade that is used for diesel injection pump is held outlet valve, is pressed on the oil outlet valve spring that subtracts between container and the fuel-displaced valve body by fuel-displaced valve body, delivery valve seat, delivery valve holder and axial clamp to form, and its essence is an one-way valve.During the Injection Pump fuel feeding, outlet valve is opened, and fuel-displaced valve body overcomes oil outlet valve spring power, thereby makes fuel oil enter high-pressure oil pipe through the delivery valve holder inner chamber; When fuel feeding finished, the pressure in the plunger hyperbaric chamber descended, under the effect of spring force, and outlet valve body drop seat, thus close being communicated with of high-pressure oil pipe and plunger hyperbaric chamber.Pressure surge occurs because outlet valve closes to close, fuel oil can produce instantaneous high pressure in the high-pressure oil pipe, when this pressure during greater than the setting pressure of oil sprayer, oil sprayer is opened, and causes secondary injection, increases fuel consumption.
II diesel engine for automobile employed Injection Pump in Europe adopts pure orifice valve structure, because orifice valve can make the residual pressure of high-pressure oil pipe identical with the oil pressure of hyperbaric chamber, after fuel feeding finishes, the residual pressure of pressuring oil pipe can be passed through the orifice valve drain charge, thereby reaches quick stop-spraying, has avoided bad injection.This structure makes Injection Pump possess good fuel economy, so promote the use of in diesel engine for automobile.But because the structural feature of pure orifice valve, when anomaly appearred in motor, the gas in the cylinder fell to go here and there, and causes air inlet in the Injection Pump hyperbaric chamber easily, made the fuel oil short circuit cause engine misses and difficult the startup.Though the residual pressure of high-pressure oil pipe is identical with the oil pressure of hyperbaric chamber, can bring the effect of quick stop-spraying,, from another point of view, plunger is covered the net lift after the pre-lift, and some will be used for the pressure process of building of high-pressure oil pipe, therefore can influence the dynamic response of motor.
The model utility content
Technical problem to be solved in the utility model is: a kind of constant pressure delivery valve that is used for diesel injection pump is provided, after the Injection Pump fuel feeding finishes, this outlet valve can make the oil pressure in the high-pressure oil pipe keep a constant malleation value, it not only can prevent the bad injection of oil sprayer, improve fuel economy, and can avoid gas to go here and there to the Injection Pump hyperbaric chamber, cause the fuel oil short circuit to make engine misses and difficult the startup.
For solving the problems of the technologies described above, the technical solution of the utility model is: the constant pressure delivery valve that is used for diesel injection pump, comprise and being bonded with each other or the fuel-displaced valve body and the delivery valve seat of may command oil circuit disconnection/connection when being disengaged, one end is connected with Injection Pump, the delivery valve holder that the other end is connected with high-pressure oil pipe, be installed on the container that subtracts of described delivery valve holder inner chamber, axial clamp is pressed on the described oil outlet valve spring that subtracts between container and the fuel-displaced valve body, described fuel-displaced valve body, delivery valve seat, oil outlet valve spring and subtract container and form first one-way valve, described fuel-displaced valve body is provided with the internal cavities that communicates with oil circuit, and the internal cavities of described fuel-displaced valve body is installed second one-way valve of oppositely opening with described first one-way valve.
Described second one-way valve can be realized with following concrete structure: described second one-way valve comprises the check valve body of the oil circuit connecting port disconnection/connection of a fuel-displaced valve body internal cavities of control, the check valve spring of cramping between first spring bearing housing and second spring bearing housing, described first spring bearing housing is near check valve body; It also comprises a limit stoper that second spring bearing housing is limited to a fixed position.
Described limit stoper is a bearing pin of radially installing along fuel-displaced valve body.
During the Injection Pump fuel feeding, high pressure oil is along the oil groove that is arranged at the external side face of outlet valve, exert pressure for the faying surface of described fuel-displaced valve body and delivery valve seat, thereby promote fuel-displaced valve body compression oil outlet valve spring, first one-way valve is opened, and fuel oil enters high-pressure oil pipe in the clear, because second one-way valve is opposite with the opening direction of first one-way valve, so in the process of fuel feeding, second one-way valve is in closed state.After fuel feeding finished, under the effect of oil outlet valve spring, first one-way valve was closed rapidly.At this moment,, open second one-way valve, the pressure of high-pressure oil pipe is reduced, therefore, often claim that this outlet valve is the pressure type pressure-relief valve if the pressure in the high-pressure oil pipe will overcome the effect of check valve spring power greater than the cracking pressure of second one-way valve; If high pressure pipe pressure is lower than the one-way valve cracking pressure, then under the effect of spring force, close second one-way valve.Like this, under various operating modes, the residual pressure after fuel feeding finishes can be regulated automatically, and remains on and be higher than on the atmospheric certain level, and its numerical value depends on the cracking pressure of second one-way valve, therefore, claims that again it is a constant pressure delivery valve.
Because the effect of second one-way valve, at first, but release when high pressure pipe pressure is excessive has the effect that prevents secondary injection.Secondly, solved when anomaly appears in motor, the gas in the cylinder can not gone here and there into Injection Pump hyperbaric chamber yet, makes the fuel oil short circuit cause the problem of engine misses and difficult startup.In addition, second one-way valve can make the residual pressure in the high-pressure oil pipe remain on the occasion of, so can effectively prevent the bubble generation, have good adaptability to changes for speed change, varying duty work.Moreover, because the oil pipe residual pressure is roughly constant, therefore each circuit fuel delivery can keep relative stability when working under fixing operating mode, this has the good stable effect to the low speed operating mode that is easy to generate the fuel feeding fluctuation, compare with the outlet valve of pure orifice valve structure, improved the dynamic corresponding of motor.
Description of drawings
Engaging drawings and Examples below further specifies the utility model.
Accompanying drawing is the utility model embodiment's a sectional view.
Embodiment
As shown in drawings, the constant pressure delivery valve that is used for diesel injection pump, comprise and being bonded with each other or the fuel-displaced valve body 3 and the delivery valve seat 1 of may command oil circuit disconnection/connection when being disengaged, the delivery valve holder 9 that one end is connected with Injection Pump, the other end is connected with high-pressure oil pipe, what be installed on described delivery valve holder inner chamber subtracts container 10, axial clamp is pressed on the described oil outlet valve spring 4 that subtracts between container 10 and the fuel-displaced valve body 2, described fuel-displaced valve body 2, delivery valve seat 1, oil outlet valve spring 4 and subtract container 5 and form first one-way valve.
Described fuel-displaced valve body 1 is provided with the internal cavities that communicates with oil circuit, and the internal cavities of described fuel-displaced valve body 1 is installed second one-way valve of oppositely opening with described first one-way valve.
Described second one-way valve comprises the check valve body 7 of the oil circuit connecting port disconnection/connection of a fuel-displaced valve body internal cavities of control, the check valve spring 5 of cramping between first spring bearing housing 6 and second spring bearing housing 4, described first spring bearing housing 6 is near check valve body 7; It comprises that also one is limited to a bearing pin 2 of radially installing along fuel-displaced valve body 1 with second spring bearing housing 4.This bearing pin 2 is limit stoper, and it can be limited to a fixing position with second spring bearing housing 4, certainly, also can adopt other structure, as the hole with back-up ring etc.
Claims (3)
1, the constant pressure delivery valve that is used for diesel injection pump, comprise and being bonded with each other or the fuel-displaced valve body (3) and the delivery valve seat (1) of may command oil circuit disconnection/connection when being disengaged, one end is connected with Injection Pump, the delivery valve holder that the other end is connected with high-pressure oil pipe (9), what be installed on described delivery valve holder inner chamber subtracts container (10), axial clamp is pressed on the described oil outlet valve spring (4) that subtracts between container (10) and the fuel-displaced valve body (2), described fuel-displaced valve body (2), delivery valve seat (1), oil outlet valve spring (4) and subtract container (5) and form first one-way valve, it is characterized in that: described delivery valve seat (1) is provided with the internal cavities that communicates with oil circuit, and the internal cavities of described fuel-displaced valve body (3) is installed second one-way valve of oppositely opening with described first one-way valve.
2, the constant pressure delivery valve that is used for diesel injection pump as claimed in claim 1, it is characterized in that: described second one-way valve comprises the check valve body (7) of the oil circuit connecting port disconnection/connection of a fuel-displaced valve body internal cavities of control, the check valve spring (5) of cramping between first spring bearing housing (6) and second spring bearing housing (4), described first spring bearing housing (6) is near check valve body (7); It also comprises a limit stoper that second spring bearing housing (4) is limited to a fixed position.
3, the constant pressure delivery valve that is used for diesel injection pump as claimed in claim 2 is characterized in that: described limit stoper is a bearing pin (2) of radially installing along fuel-displaced valve body (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520125027 CN2903453Y (en) | 2005-11-28 | 2005-11-28 | Constant pressure oil outlet valve of diesel engine oil injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520125027 CN2903453Y (en) | 2005-11-28 | 2005-11-28 | Constant pressure oil outlet valve of diesel engine oil injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2903453Y true CN2903453Y (en) | 2007-05-23 |
Family
ID=38078864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520125027 Expired - Lifetime CN2903453Y (en) | 2005-11-28 | 2005-11-28 | Constant pressure oil outlet valve of diesel engine oil injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2903453Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865062A (en) * | 2010-06-03 | 2010-10-20 | 宁波舜田良源油嘴油泵有限公司 | Constant pressure oil outlet valve |
| CN107120220A (en) * | 2017-06-30 | 2017-09-01 | 南岳电控（衡阳）工业技术股份有限公司 | A kind of injection pump for preventing diesel engine starting difficult |
| CN107575325A (en) * | 2017-10-20 | 2018-01-12 | 江苏常发农业装备股份有限公司 | A kind of equal pressure mechanical oil pump |
| CN107842452A (en) * | 2017-10-09 | 2018-03-27 | 中国第汽车股份有限公司 | A kind of monoblock type combined valve device, can pressure initialization fuel oil on-off controlling system and control method |
| CN110159470A (en) * | 2019-05-31 | 2019-08-23 | 南京威孚金宁有限公司 | A kind of VE dispensing pump damping delivery valve and application method |
| CN110285235A (en) * | 2019-07-23 | 2019-09-27 | 实用动力(中国)工业有限公司 | A kind of oil filler plug and working method for truck cap overturning system manual pump |
| CN112635214A (en) * | 2020-12-14 | 2021-04-09 | 西安交通大学 | Device and method for protecting deformation of top cover of converter transformer on-load voltage regulation switch |
| CN112761841A (en) * | 2020-12-23 | 2021-05-07 | 南岳电控（衡阳）工业技术股份有限公司 | Fuel injection pump for preventing difficult starting of diesel engine |
-
2005
- 2005-11-28 CN CN 200520125027 patent/CN2903453Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865062A (en) * | 2010-06-03 | 2010-10-20 | 宁波舜田良源油嘴油泵有限公司 | Constant pressure oil outlet valve |
| CN107120220A (en) * | 2017-06-30 | 2017-09-01 | 南岳电控（衡阳）工业技术股份有限公司 | A kind of injection pump for preventing diesel engine starting difficult |
| CN107120220B (en) * | 2017-06-30 | 2023-08-29 | 南岳电控（衡阳）工业技术股份有限公司 | Fuel injection pump for preventing difficult starting of diesel engine |
| CN107842452A (en) * | 2017-10-09 | 2018-03-27 | 中国第汽车股份有限公司 | A kind of monoblock type combined valve device, can pressure initialization fuel oil on-off controlling system and control method |
| CN107575325A (en) * | 2017-10-20 | 2018-01-12 | 江苏常发农业装备股份有限公司 | A kind of equal pressure mechanical oil pump |
| CN107575325B (en) * | 2017-10-20 | 2024-02-27 | 江苏常发农业装备股份有限公司 | Isobaric mechanical oil pump |
| CN110159470A (en) * | 2019-05-31 | 2019-08-23 | 南京威孚金宁有限公司 | A kind of VE dispensing pump damping delivery valve and application method |
| CN110285235A (en) * | 2019-07-23 | 2019-09-27 | 实用动力(中国)工业有限公司 | A kind of oil filler plug and working method for truck cap overturning system manual pump |
| CN112635214A (en) * | 2020-12-14 | 2021-04-09 | 西安交通大学 | Device and method for protecting deformation of top cover of converter transformer on-load voltage regulation switch |
| CN112635214B (en) * | 2020-12-14 | 2022-05-20 | 西安交通大学 | Converter transformer on-load voltage regulation switch top cover deformation protection device and method |
| CN112761841A (en) * | 2020-12-23 | 2021-05-07 | 南岳电控（衡阳）工业技术股份有限公司 | Fuel injection pump for preventing difficult starting of diesel engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070523 |
|
| EXPY | Termination of patent right or utility model |