CN203702413U - Fuel pump - Google Patents
Fuel pump Download PDFInfo
- Publication number
- CN203702413U CN203702413U CN201420035273.5U CN201420035273U CN203702413U CN 203702413 U CN203702413 U CN 203702413U CN 201420035273 U CN201420035273 U CN 201420035273U CN 203702413 U CN203702413 U CN 203702413U
- Authority
- CN
- China
- Prior art keywords
- pump
- fuel
- supply
- pressure
- oil feed
- 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.)
- Expired - Fee Related
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 55
- 239000003921 oil Substances 0.000 claims description 37
- 239000000295 fuel oil Substances 0.000 claims description 25
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 239000002828 fuel tank Substances 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
The utility model relates to a fuel pump. The fuel pump comprises a pre-supply mechanical pump body, an electronic fuel-supply pump body and a high-pressure pump body. The fuel pump further comprises a pressure sensor used for measuring the output pressure of the pre-supply mechanical pump body, wherein only when the output pressure, measured through the pressure sensor, of the pre-supply mechanical pump body is lower than a first preset value can the pre-supply mechanical pump body and the electronic fuel-supply pump body be simultaneously switched on to supply fuel to the high-pressure pump body.
Description
Technical field
The utility model relates to the fuel pump for vehicle, is specifically related to the fuel pump for for example Common Rail Fuel Injection System in Diesel Engine of internal-combustion engine.
Background technique
At the common-rail injection system for vehicle, fuel pump comprises pre-supply pump and high-pressure service pump generally.Pre-supply pump is arranged to fuel pump sucking-off fuel source, and fuel oil is pressurized to predetermined low pressure, and the fuel oil in described predetermined low pressure is fed to high-pressure service pump.High-pressure service pump is arranged to and will be pressurized to predetermined high pressure in the fuel oil of described predetermined low pressure, and will output to the common rail of common-rail injection system in the fuel oil of described predetermined high pressure.
In majority application, especially, in to the diesel fuel applications of manufacture cost sensitivity, pre-supply pump is embodied as mechanical pump, because mechanical pump is more cheap.But the limited even possibility of fuel oil output quantity of mechanical pump is not enough.In this case, the output quantity of fuel oil can be subject to negative sense impact.Namely, lower fuel oil supply pressure may cause fuel oil output quantity deficiency.If can not there be enough fuel oils to output to high-pressure service pump from pre-supply pump, the fuel oil that is supplied to common rail from high-pressure service pump also can be not enough.
Alternatively, pre-supply pump also may be presented as the effectively electronics oil feed pump in fuel feeding field.But compared with mechanical pump, electronics oil feed pump is somewhat expensive.Although mechanical pump can be replaced completely by electronics oil feed pump in performance, for the consideration of manufacture cost, artificer generally can not do this replacement.
Therefore wish on the basis not raising the cost, to solve the shortcoming of above-mentioned mechanical pump far away.
Model utility content
The purpose of this utility model is to guarantee to have all the time enough fuel oils to be fed to high-pressure service pump from pre-supply mechanical pump in fuel pump, guarantees that the manufacture cost of whole fuel pump can not improve to a great extent simultaneously.
For, improve a kind of fuel pump according to the utility model, described fuel pump comprises pre-supply mechanical pump, electronics oil feed pump and high-pressure service pump, described fuel pump also comprises the pressure transducer of the delivery pressure for measuring described pre-supply mechanical pump, wherein, the delivery pressure of the described pre-supply mechanical pump of only measuring when described pressure transducer is during lower than the first predetermined value, and described pre-supply mechanical pump and described electronics oil feed pump are simultaneously in the on-state to described high-pressure service pump supply fuel oil.
According to a preferred embodiment, when the delivery pressure of the described pre-supply mechanical pump of measuring when described pressure transducer is equal to or greater than higher than the second predetermined value of described the first predetermined value, described pre-supply mechanical pump in the on-state to described high-pressure service pump supply fuel oil and described electronics oil feed pump in the off state to described high-pressure service pump supply fuel oil not.
According to a preferred embodiment, described fuel pump also comprises the filter that is positioned at described pre-supply mechanical pump upstream.
According to a preferred embodiment, the upstream of described electronics oil feed pump described filter between fuel tank and described filter.
According to a preferred embodiment, upstream or the downstream of described pressure transducer described filter between described electronics oil feed pump and described pre-supply mechanical pump.
According to a preferred embodiment, described the first predetermined value is 0.35 bar, and described the second predetermined value is 0.5 bar.
According to a preferred embodiment, described pre-supply mechanical pump is vane pump or gear pump.
According to a preferred embodiment, described electronics oil feed pump is low power electronics oil feed pump.
According to a preferred embodiment, described fuel pump is the high pressure fuel pump for the common-rail injection system of internal-combustion engine.
According to the utility model, by adding electronics oil feed pump for fuel pump, no matter guaranteed in the case of pre-supply mechanical pump self the delivery pressure deficiency of fuel pump or supplied in advance mechanical pump normal running whether to there is all the time enough output fuel pressures, and by measure the delivery pressure of pre-supply mechanical pump with pressure transducer, make only can not enough to fire electronics oil feed pump under oil condition to high-pressure service pump supply at pre-supply mechanical pump self and just activated, this has reduced running cost.In addition, electronics oil feed pump is low power electronics oil feed pump, so the cost of whole fuel pump can be provided to a great extent.
Brief description of the drawings
Above-mentioned and further feature of the present utility model and advantage will be better understood in the preferred embodiment of describing by reference to the accompanying drawings, wherein:
Fig. 1 is the fuel flow schematic diagram according to a part for fuel pump of the present utility model.
Embodiment
Fig. 1 shows the fuel flow schematic diagram according to a part for fuel pump of the present utility model.
Be different from the fuel pump according to prior art, comprise fuel tank 1 according to fuel pump of the present utility model, it can be arranged at the pump case outside of fuel pump; Low power electronics oil feed pump 3, supplies mechanical pump 5 in advance, and it can be vane pump or gear pump or any other suitable low pressure pump; And high-pressure service pump (not shown).Filter 7 is arranged at electronics oil feed pump 3 and supplies in advance between mechanical pump 5.
Be different from addition fuel pump of the prior art, further comprise the pressure transducer 9 of the delivery pressure for measuring pre-supply mechanical pump 5 according to fuel pump of the present utility model.For this purpose, pressure transducer 9 can be arranged at upstream or the downstream (as shown in the figure) of filter 7.
In operating process, fuel oil is pumped into from fuel tank 1 pre-supply mechanical pump 5, in pre-supply mechanical pump 5, is pressurized to predetermined low pressure, is fed to high-pressure service pump from pre-supply mechanical pump 5, in high-pressure service pump, be pressurized to predetermined high pressure, and output in the common rail of common-rail injection system.
Under routine, supply in advance mechanical pump 5 and be designed to have for high-pressure service pump enough large delivery pressure, described delivery pressure has minimum allowable pressure value.
In course of normal operation, the fuel oil that is pumped out fuel tank 1 is pumped into pre-supply mechanical pump 5 via one-way valve 2 and filter 7, the delivery pressure of the pre-supply mechanical pump 5 of being measured by pressure transducer 9 maintains under the standard pressure higher than minimum allowable pressure value substantially, and this indicates that enough fuel oils are fed to high-pressure service pump from pre-supply mechanical pump 5.In this case, low power electronics oil feed pump 3 is not worked, and only has pre-supply mechanical pump 5 to high pressure fuel supply pump.
But the charge oil pressure of mechanical pump may be not enough, thus the delivery pressure of the pre-supply mechanical pump 5 of being measured by pressure transducer 9 lower than minimum allowable pressure value, this represents to export and be fed to the Low oil Fuel of high-pressure service pump from pre-supply mechanical pump 5.Now, pressure transducer 9 activates low power electronics oil feed pump 3.In this case, be pumped to pre-supply mechanical pump 5 from the fuel oil of fuel tank 1 via low power electronics oil feed pump 3 and filter 7.The charge oil pressure of pre-supply mechanical pump 5 and the fuel oil output quantity of therefore supplying in advance mechanical pump 5 are increased, until the delivery pressure of measured pre-supply mechanical pump 5 arrives standard pressure.
Therefore, can say, be configured to supply in advance supplementing of mechanical pump 5 according to the low power electronics oil feed pump 3 of fuel pump of the present utility model.
In one embodiment, the minimum allowable pressure value of supplying in advance mechanical pump 5 can be 0.35 bar, and standard pressure can be 0.5 bar.In this case, in operating process, the actual delivery pressure that pre-supply mechanical pump 5 detected when pressure transducer 9 is during lower than 0.35 bar, and low power electronics oil feed pump 3 activated with Extra Supply fuel oil, arrives 0.5 bar until supply in advance the actual delivery pressure of mechanical pump 5.
By this way, comprise electronics oil feed pump 3 according to fuel pump of the present utility model, solved for some reason and only can not supply the technical problem of enough fuel oils to high-pressure service pump by pre-supply mechanical pump.That is to say, guaranteed to have all the time enough fuel oils to be supplied to high-pressure service pump and to be therefore fed to the common rail of common-rail injection system.
On the other hand, the electronics oil feed pump adopting according to the utility model is low power electronics oil feed pump, can greatly not increase the cost of whole fuel pump, because the price of electronics oil feed pump depends on its discharge capacity, electronics fuel feeding pump delivery is lower, more cheap.
According to the utility model, normal pressure demand can be met always, no matter supply in advance whether normal running of mechanical pump.In addition, because increase is only low power electronics oil feed pump, the manufacture cost of whole fuel pump does not increase greatly.The situation that this technological scheme is slightly poorer than cost demand for performance requirement is very applicable.
Although illustrated with reference to accompanying drawing and described particularly preferred mode of execution in the above, they all only provide and are not intended to limit scope of the present utility model as example.On the contrary, in the situation that not departing from essence of the present utility model and scope, can carry out various substitutions and modifications to structure described herein and form.
Claims (9)
1. a fuel pump, it is characterized in that, described fuel pump comprises pre-supply mechanical pump, electronics oil feed pump and high-pressure service pump, described fuel pump also comprises the pressure transducer of the delivery pressure for measuring described pre-supply mechanical pump, wherein, the delivery pressure of the described pre-supply mechanical pump of only measuring when described pressure transducer is during lower than the first predetermined value, and described pre-supply mechanical pump and described electronics oil feed pump are simultaneously in the on-state to described high-pressure service pump supply fuel oil.
2. fuel pump according to claim 1, it is characterized in that, when the delivery pressure of the described pre-supply mechanical pump of measuring when described pressure transducer is equal to or greater than higher than the second predetermined value of described the first predetermined value, described pre-supply mechanical pump in the on-state to described high-pressure service pump supply fuel oil and described electronics oil feed pump in the off state to described high-pressure service pump supply fuel oil not.
3. fuel pump according to claim 2, is characterized in that, described fuel pump also comprises the filter that is positioned at described pre-supply mechanical pump upstream.
4. fuel pump according to claim 3, is characterized in that, the upstream of described electronics oil feed pump described filter between fuel tank and described filter.
5. fuel pump according to claim 4, is characterized in that, upstream or the downstream of described pressure transducer described filter between described electronics oil feed pump and described pre-supply mechanical pump.
6. according to arbitrary described fuel pump in claim 2-5, it is characterized in that, described the first predetermined value is 0.35 bar, and described the second predetermined value is 0.5 bar.
7. according to arbitrary described fuel pump in claim 1-5, it is characterized in that, described pre-supply mechanical pump is vane pump or gear pump.
8. according to arbitrary described fuel pump in claim 1-5, it is characterized in that, described electronics oil feed pump is low power electronics oil feed pump.
9. according to arbitrary described fuel pump in claim 1-5, it is characterized in that, described fuel pump is the high pressure fuel pump for the common-rail injection system of internal-combustion engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420035273.5U CN203702413U (en) | 2014-01-20 | 2014-01-20 | Fuel pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420035273.5U CN203702413U (en) | 2014-01-20 | 2014-01-20 | Fuel pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203702413U true CN203702413U (en) | 2014-07-09 |
Family
ID=51052866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420035273.5U Expired - Fee Related CN203702413U (en) | 2014-01-20 | 2014-01-20 | Fuel pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203702413U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632483A (en) * | 2014-12-26 | 2015-05-20 | 长城汽车股份有限公司 | Direct injection gasoline engine oil supply system, gasoline engine and automobile |
| CN106246424A (en) * | 2016-08-29 | 2016-12-21 | 潍柴动力股份有限公司 | High-pressure oil pump, engine fuel oil system and electromotor |
| CN106762297A (en) * | 2016-12-31 | 2017-05-31 | 南岳电控（衡阳）工业技术股份有限公司 | A kind of single cylinder co-rail fuel feed pump of the fuel-displaced control formula of high pressure |
-
2014
- 2014-01-20 CN CN201420035273.5U patent/CN203702413U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632483A (en) * | 2014-12-26 | 2015-05-20 | 长城汽车股份有限公司 | Direct injection gasoline engine oil supply system, gasoline engine and automobile |
| CN106246424A (en) * | 2016-08-29 | 2016-12-21 | 潍柴动力股份有限公司 | High-pressure oil pump, engine fuel oil system and electromotor |
| CN106246424B (en) * | 2016-08-29 | 2019-07-30 | 潍柴动力股份有限公司 | High-pressure oil pump, engine fuel oil system and engine |
| CN106762297A (en) * | 2016-12-31 | 2017-05-31 | 南岳电控（衡阳）工业技术股份有限公司 | A kind of single cylinder co-rail fuel feed pump of the fuel-displaced control formula of high pressure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 214028 No.17 Xinhua Road, national high tech Industrial Development Zone, Wuxi City, Jiangsu Province Patentee after: Bosch powertrain Co.,Ltd. Address before: 214028 No.17 Xinhua Road, national high tech Industrial Development Zone, Wuxi City, Jiangsu Province Patentee before: Bosch Automotive Diesel Systems Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 |