CN104500294A - Exhaust structure of high-pressure oil pump - Google Patents
Exhaust structure of high-pressure oil pump Download PDFInfo
- Publication number
- CN104500294A CN104500294A CN201410831961.7A CN201410831961A CN104500294A CN 104500294 A CN104500294 A CN 104500294A CN 201410831961 A CN201410831961 A CN 201410831961A CN 104500294 A CN104500294 A CN 104500294A
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- CN
- China
- Prior art keywords
- pressure oil
- oil pump
- exhaust structure
- exhaust
- relief valve
- Prior art date
- 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.)
- Pending
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Abstract
The invention relates to the field of diesel engines, and relates to an exhaust structure of a high-pressure oil pump. The exhaust structure comprises an overflow valve, wherein a valve core of the overflow valve is provided with an oil drainage groove; a low-pressure oil way inlet of the overflow valve is communicated with an overflow outlet hole of the overflow valve through the oil drainage groove; the outlet hole is communicated with an outer circulation oil return line; the oil drainage groove is a flat groove with depth of 0.05-0.07 mm. The exhaust structure has the beneficial effects that a bleed screw is saved, the exhaust is convenient and is not limited to an external space, and the exhaust can be directly performed through a hand oil pump before the overflow valve is opened.
Description
Technical field
The present invention relates to diesel engine arts, relate to a kind of exhaust structure of high pressure oil pump specifically.
Background technique
What the exhaust of existing economical high pressure oil pump adopted is between vane pump and relief valve, add a bleed screw (see Fig. 5), need to unclamp bleed screw during exhaust just can be exhausted by the hand oil pump on low pressure oil way simultaneously, this exhaust mode is owing to being subject to car load spatial constraints, bleed screw is difficult to play a role, and hand oil pump pressure (1.6bar) cannot open relief valve (2.3bar), air does not become loop, affects the starting performance of motor.
Summary of the invention
The object of the invention is to solve the problem, a kind of exhaust structure of high pressure oil pump is provided.
In order to realize object of the present invention, the technical solution used in the present invention is:
An exhaust structure for high pressure oil pump, comprises relief valve, and the spool of described relief valve is opened a drain pan, and what the low pressure oil way import of relief valve was communicated with relief valve by this drain pan overflows oral pore, this outlet opening thereof outer circulation oil circuit.
Described drain pan is plat slot, and groove depth is 0.05 ~ 0.07 millimeter.
Beneficial effect of the present invention is: omit bleed screw, exhaust and convenient, does not limit by space outerpace; Before relief valve is opened, just can be directly vented by hand oil pump.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention,
Fig. 2 is valve core structure schematic diagram of the present invention,
Fig. 3 is that exhaust and draining move towards schematic diagram by drain pan of the present invention,
Fig. 4 is the high pressure oil pump oil circuit figure after improving,
Fig. 5 be improve before have bleed screw high pressure oil pump schematic appearance.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described:
Embodiment: see Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5.
An exhaust structure for high pressure oil pump, comprises relief valve 1, and the spool of described relief valve 1 is opened a drain pan 2, and what the low pressure oil way import 4 of relief valve 1 was communicated with relief valve 1 by this drain pan 2 overflows oral pore 3, and this exit orifice 3 is communicated with outer circulation oil circuit.
Described drain pan 2 is plat slot, and groove depth is 0.05 ~ 0.07 millimeter.
Oil pump oil circuit after improvement illustrates: see accompanying drawing 4,
(1) fuel from fuel tank is successively through filter cleaner, vane pump, fuel-flow control unit and oiling valve, arrives high-pressure plunger chamber.
(2) a unnecessary oil mass part gets back to fuel tank by outer oil return, and another part gets back to vane pump oil inlet end by interior oil return.Drain pan communicates with outer circulation return opening, just communicates with fuel tank before relief valve is opened, by can directly be vented after hand oil pump work.
(3) zero fuel feeding (oil from electronic flow control unit leaks) get back to oil transfer pump.
(4) high pressure oil arrives high pressure oil rail from plunger cavity.
What embodiments of the invention were announced is preferred embodiment, but is not limited thereto, those of ordinary skill in the art; very easily according to above-described embodiment, understand spirit of the present invention, and make different amplifications and change; but only otherwise depart from spirit of the present invention, all in protection scope of the present invention.
Claims (2)
1. the exhaust structure of a high pressure oil pump, comprise relief valve, it is characterized in that: on the spool of described relief valve, open a drain pan, what the low pressure oil way import of relief valve was communicated with relief valve by this drain pan overflows oral pore, this outlet opening thereof outer circulation oil circuit.
2. the exhaust structure of a kind of high pressure oil pump according to claim 1, is characterized in that: described drain pan is plat slot, and groove depth is 0.05 ~ 0.07 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410831961.7A CN104500294A (en) | 2014-12-29 | 2014-12-29 | Exhaust structure of high-pressure oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410831961.7A CN104500294A (en) | 2014-12-29 | 2014-12-29 | Exhaust structure of high-pressure oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104500294A true CN104500294A (en) | 2015-04-08 |
Family
ID=52941732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410831961.7A Pending CN104500294A (en) | 2014-12-29 | 2014-12-29 | Exhaust structure of high-pressure oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104500294A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246429A (en) * | 2016-08-30 | 2016-12-21 | 潍柴动力股份有限公司 | Engine fuel oil system and include the electromotor of this engine fuel oil system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0307739A2 (en) * | 1987-09-17 | 1989-03-22 | Daimler-Benz Aktiengesellschaft | Deaerator for fuel installation in internal combustion engines |
| CN1553992A (en) * | 2002-08-29 | 2004-12-08 | ���ء����߸� | Device for ventilation of a supply unit |
| CN101501322A (en) * | 2006-08-14 | 2009-08-05 | 康明斯过滤Ip公司 | Fuel system with air venting and fuel anti-drainback |
| CN103339364A (en) * | 2011-01-31 | 2013-10-02 | 罗伯特·博世有限公司 | Overflow valve for a fuel injection system and fuel injection system comprising an overflow valve |
| CN204371536U (en) * | 2014-12-29 | 2015-06-03 | 江铃汽车股份有限公司 | A kind of exhaust structure of high pressure oil pump |
-
2014
- 2014-12-29 CN CN201410831961.7A patent/CN104500294A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0307739A2 (en) * | 1987-09-17 | 1989-03-22 | Daimler-Benz Aktiengesellschaft | Deaerator for fuel installation in internal combustion engines |
| CN1553992A (en) * | 2002-08-29 | 2004-12-08 | ���ء����߸� | Device for ventilation of a supply unit |
| CN101501322A (en) * | 2006-08-14 | 2009-08-05 | 康明斯过滤Ip公司 | Fuel system with air venting and fuel anti-drainback |
| CN103339364A (en) * | 2011-01-31 | 2013-10-02 | 罗伯特·博世有限公司 | Overflow valve for a fuel injection system and fuel injection system comprising an overflow valve |
| CN204371536U (en) * | 2014-12-29 | 2015-06-03 | 江铃汽车股份有限公司 | A kind of exhaust structure of high pressure oil pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246429A (en) * | 2016-08-30 | 2016-12-21 | 潍柴动力股份有限公司 | Engine fuel oil system and include the electromotor of this engine fuel oil system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150408 |