CN206830356U - A kind of injection pump for preventing diesel engine starting difficult - Google Patents
A kind of injection pump for preventing diesel engine starting difficult Download PDFInfo
- Publication number
- CN206830356U CN206830356U CN201720781752.5U CN201720781752U CN206830356U CN 206830356 U CN206830356 U CN 206830356U CN 201720781752 U CN201720781752 U CN 201720781752U CN 206830356 U CN206830356 U CN 206830356U
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- CN
- China
- Prior art keywords
- pump
- electronically controlled
- controlled unit
- installation cavity
- fuel inlet
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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.)
- Withdrawn - After Issue
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- Fuel-Injection Apparatus (AREA)
- High-Pressure Fuel Injection Pump Control (AREA)
Abstract
A kind of injection pump for preventing diesel engine starting difficult disclosed in the utility model, including:The high-pressure oil pump pump housing being connected with engine；Some sets are arranged on the electronically controlled unit pump in the high-pressure oil pump pump housing side by side, and control valve element is provided with the electronically controlled unit pump；The fuel inlet fitting being arranged on by swivel nut and seal in the fuel inlet fitting installation cavity；The gate gurgle valve being arranged on by swivel nut and seal in the gate gurgle valve installation cavity；The lowest part of the lowest part of its fuel inlet fitting and the gate gurgle valve is higher than the highest point of the control valve element in the electronically controlled unit pump.As low pressure oil way has air entrance, because relief valve and fuel inlet fitting lowest part are higher than the highest point for controlling valve element, air enter at relief valve, fuel inlet fitting after because control valve element highest point have oily covering, so as to which air can not enter high-pressure oil pipe by controlling at valve element, can effectively avoid because low pressure oil way enters after air to cause difficulty in starting or can not start.
Description
Technical field
A kind of high-pressure oil pump technical field of diesel engine is the utility model is related to, it is more particularly to a kind of to be applied to fuel oil
Spraying system prevents the injection pump of difficulty in starting after low pressure oil way enters air.
Background technology
Delivery valve in existing monoblock pump is using damping valve arrangement, and after entering air at low pressure oil way, air can be along low
Pressure chamber oil circuit is entered in high-pressure oil pipe always, and is caused diesel engine starting difficult or even can not be started.
Chinese utility model patent CN201010261721.X discloses a kind of automatically controlled monomer of injecting fuel of diesel motor
Sundstrand pump, including the pump housing；One is arranged on the camshaft in the pump housing；Oil transfer pump of the outer side-lower of the pump housing by camshaft actuated is installed
Fuel oil is pumped into the high-pressure oil duct in the pump housing by assembly, the oil transportation pump assembly；It also includes some sets and is installed on the pump housing side by side
On electronically controlled unit pump, the plunger in the electronically controlled unit pump is controlled by the camshaft；The plunger will be entered by high-pressure oil duct
The fuel oil entered in plunger cavity compresses, and the magnetic valve on the electronically controlled unit pump is controlled by ECU control devices, by plunger cavity internal pressure
The fuel oil of contracting sprays into cylinder.Once the utility model patent can enter in the presence of low pressure oil way air can cause difficulty in starting or
The problems such as person can not start.Its high-pressure pump pump housing, which is also limited by present structure, to be optimized to oil circuit.
Utility model content
Technical problem to be solved in the utility model can cause to start after entering air for existing monoblock pump low pressure oil way
It is difficult or provide a kind of injection pump for preventing diesel engine starting difficult the problem of can not start.
Technical problem to be solved in the utility model can be achieved through the following technical solutions：
A kind of injection pump for preventing diesel engine starting difficult, including:
The high-pressure oil pump pump housing being connected with engine, the high-pressure oil pump pump housing is interior to have the installation of some electronically controlled unit pumps
Chamber, oil-feed enter an installation cavity and gate gurgle valve installation cavity, the fuel inlet fitting installation cavity and adjacent electronically controlled unit pump installation cavity it
Between, oil hole, all electronically controlled unit pump installation cavity and an oil duct are provided between two adjacent electronically controlled unit pump installation cavitys
Connection, the oil duct connect with the gate gurgle valve installation cavity, and the oil hole and oil duct are arranged at the high-pressure oil pump pump
In vivo；
Some sets are arranged on the electronically controlled unit pumps in some electronically controlled unit pump installation cavitys side by side, in each electronically controlled unit pump
Low pressure chamber connects with corresponding oil hole；Control valve element is installed in the electronically controlled unit pump；
The fuel inlet fitting being arranged on by swivel nut and seal in the fuel inlet fitting installation cavity；
The gate gurgle valve being arranged on by swivel nut and seal in the gate gurgle valve installation cavity；Characterized in that, it is described enter
The lowest part of the lowest part of oily joint and the gate gurgle valve is higher than the highest point of the control valve element in the electronically controlled unit pump.
As a result of technical scheme as above, the utility model can prevent after entering air at low pressure oil way that air is not
It can be entered along low pressure chamber in high-pressure oil pipe, can effectively avoid diesel engine starting difficult or can not start.
Brief description of the drawings
Fig. 1 is the front view that the utility model prevents the difficult injection pump of diesel engine starting.
Fig. 2 is Fig. 1 right view.
Fig. 3 is the centre section schematic diagram that the utility model prevents the difficult injection pump of diesel engine starting.
Fig. 4 is the partial structural diagram that the utility model prevents the difficult injection pump of diesel engine starting.
Fig. 5 is the section signal that the utility model prevents the high-pressure oil pump pump housing in the difficult injection pump of diesel engine starting
Figure.
Embodiment
In order that technological means, creation characteristic, reached purpose and effect that the utility model is realized are easy to understand, under
Face combines and is specifically illustrating, and the utility model is expanded on further.
Referring to Fig. 1 to Fig. 5, a kind of injection pump for preventing diesel engine starting difficult for being provided in figure, including high-pressure oil pump pump
Body 100, the high-pressure oil pump pump housing 100 is interior, and there are some electronically controlled unit pump installation cavitys 110, oil-feed to enter an installation cavity 120 and gate gurgle valve
Installation cavity 130, between fuel inlet fitting installation cavity 120 and adjacent electronically controlled unit pump installation cavity 120, two adjacent automatically controlled monomers
Oil hole a is provided between pump installation cavity 120, all electronically controlled unit pump installation cavitys 120 connect with an oil duct b, and oil duct b is with letting out
Fuel tap installation cavity 130 is connected, and oil hole a and oil duct b are arranged in the high-pressure oil pump pump housing 100.
A kind of injection pump for preventing that diesel engine starting is difficult provided in figure also includes some sets is pacified side by side by screw 210
Electronically controlled unit pump 200 in some electronically controlled unit pump installation cavitys 120, the low pressure chamber in each electronically controlled unit pump 200 is (in figure
It is not shown) connected with corresponding oil hole a；Control valve element 220 is installed in electronically controlled unit pump 200.
A kind of injection pump for preventing that diesel engine starting is difficult provided in figure also includes passing through swivel nut 310 and seal
320th, 330 it is arranged on the fuel inlet fitting 300 in fuel inlet fitting installation cavity 110；With pass through swivel nut 410 and seal 420,430
Gate gurgle valve 400 in gate gurgle valve installation cavity 130.
The characteristics of the utility model, is that the lowest part of fuel inlet fitting 300 and the lowest part of gate gurgle valve 400 are higher than automatically controlled list
The highest point of control valve element 220 in body pump 200.
Fuel oil enters from fuel inlet fitting 300, and the low pressure of electronically controlled unit pump 200 is flowed through through the oil hole a of the high-pressure oil pump pump housing 100
The oil duct b that chamber flows into the high-pressure oil pump pump housing 100 again, finally flows out from relief valve 400.
The utility model improves relief valve 400 and the installation site of fuel inlet fitting 300, when low pressure oil way has air entrance
When, because relief valve 400 and the lowest part of fuel inlet fitting 300 connect higher than the highest point for controlling valve element, air from relief valve 400, oil-feed
Because the control highest point of valve element 220 has oily covering after entering at first 300, so as to which air can not be entered by controlling at valve element 220
To high-pressure oil pipe, therefore avoid because low pressure oil way enters after air to cause difficulty in starting or can not start.
The advantages of general principle of the present utility model, principal character and the utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate structural principle of the present utility model, on the premise of the spirit and scope of the utility model is not departed from, this practicality newly
Type also has various changes and modifications, and these changes and improvements are both fallen within claimed the scope of the utility model.This practicality
New claimed scope has appended claims and its equivalent to define.
Claims (1)
1. a kind of injection pump for preventing diesel engine starting difficult, including:
The high-pressure oil pump pump housing being connected with engine, the high-pressure oil pump pump housing is interior to be had some electronically controlled unit pump installation cavitys, enters
Oil enters an installation cavity and gate gurgle valve installation cavity, between the fuel inlet fitting installation cavity and adjacent electronically controlled unit pump installation cavity, two
Oil hole is provided between individual adjacent electronically controlled unit pump installation cavity, all electronically controlled unit pump installation cavitys connect with an oil duct,
The oil duct is connected with the gate gurgle valve installation cavity, and the oil hole and oil duct are arranged in the high-pressure oil pump pump housing；
Some sets are arranged on the electronically controlled unit pumps in some electronically controlled unit pump installation cavitys, the low pressure in each electronically controlled unit pump side by side
Chamber connects with corresponding oil hole；Control valve element is installed in the electronically controlled unit pump；
The fuel inlet fitting being arranged on by swivel nut and seal in the fuel inlet fitting installation cavity；
The gate gurgle valve being arranged on by swivel nut and seal in the gate gurgle valve installation cavity；It is characterized in that：
The lowest part of the lowest part of the fuel inlet fitting and the gate gurgle valve is higher than the control valve element in the electronically controlled unit pump
Highest point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720781752.5U CN206830356U (en) | 2017-06-30 | 2017-06-30 | A kind of injection pump for preventing diesel engine starting difficult |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720781752.5U CN206830356U (en) | 2017-06-30 | 2017-06-30 | A kind of injection pump for preventing diesel engine starting difficult |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206830356U true CN206830356U (en) | 2018-01-02 |
Family
ID=60778558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720781752.5U Withdrawn - After Issue CN206830356U (en) | 2017-06-30 | 2017-06-30 | A kind of injection pump for preventing diesel engine starting difficult |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206830356U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2017
- 2017-06-30 CN CN201720781752.5U patent/CN206830356U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180102 Effective date of abandoning: 20230829 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180102 Effective date of abandoning: 20230829 |