CN103967665A - Fuel supply equipment of common rail type fuel injection system and fuel supply control method - Google Patents
Fuel supply equipment of common rail type fuel injection system and fuel supply control method Download PDFInfo
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- CN103967665A CN103967665A CN201410079546.0A CN201410079546A CN103967665A CN 103967665 A CN103967665 A CN 103967665A CN 201410079546 A CN201410079546 A CN 201410079546A CN 103967665 A CN103967665 A CN 103967665A
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- fuel
- pressure
- batching unit
- output
- throttling arrangement
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Abstract
Disclosed are fuel supply equipment (100) of a common rail type fuel injection system and a fuel supply control method. The fuel supply equipment (100) includes a lower pressure pump (2) which supplies fuel from a fuel tank (4) to a high pressure pump (6), such as a port-controlled reciprocating pump (6), through a fitler (8) and a meterin unit (10). A one-way valve (14) is arranged between an outlet of the metering unit (10) and an inlet of the high pressure pump (6). The one-way valve (14) selectively supplies fuel output by the metering unit (10) to the high pressure pump (6) according to fuel pressure at an output position of the metering unit (10)/ A retrun pipeline (16) connects output of the metering unit (10) to the fuel tank (4). A throttling device (18) on the return pipeline (16) selectively supplies a part of fuel output from the metering unit (10) to the fuel tank (4).
Description
Technical field
The present invention relates to fuel facility and fuel supply control method for common rail type fuel injection system.More specifically, the present invention relates to the fuel supply of controlling to the high-pressure service pump for common rail type fuel injection system.
Background technique
In common rail type fuel injection system, low pressure pump is fed to high-pressure service pump from fuel tank by batching unit by fuel.Described batching unit regulates the amount of the fuel that is supplied to high-pressure service pump.High-pressure service pump is by fuel pressure boost and be supplied to common rail.In some cases, for example, in the time that automobile is advanced along descending path, fuel is not provided to sparger.If described pump continues to the described supply of rail altogether fuel, the fuel pressure being total in rail may be increased to dangerous level.Therefore, in the time that the pressure at common rail place exceedes particular value described in batching unit be closed, to avoid the continuation fuel supply to high-pressure service pump.
But fuel still leaks by the operating clearance of batching unit, and continues to flow to high-pressure service pump.Therefore, high-pressure service pump continues pressurized fuel and is supplied to described rail altogether.
Therefore, need to control the fuel supply to high-pressure service pump, thereby avoid not wanting and the increase of less desirable pressure at described rail place altogether.
Summary of the invention
The present invention includes fuel facility and the fuel supply control method of common rail type fuel injection system.Described fuel facility comprises the one-way valve between batching unit and high-pressure service pump.High-pressure service pump can be the reciprocating pump of Port-Controlled.One-way valve is optionally supplied to described high-pressure service pump according to the fuel pressure of the output of batching unit by the fuel of the output from described batching unit.The output of described batching unit is connected to described fuel tank by return line.Return line has throttling arrangement.Described throttling arrangement optionally supplies to be back to fuel tank by a part for the fuel of the output from described batching unit.
One-way valve prevents the less desirable fuel supply to described high-pressure service pump, and avoids the undesired pressure at common rail place to increase.
One-way valve is just opened when only the pressure when the output of batching unit reaches threshold value, so the fuel leaking by the working clearance of batching unit can not flow through one-way valve.
In addition, a part for the fuel leaking from batching unit is supplied to be back to fuel tank by the throttling arrangement being arranged on return line.Therefore the fuel, leaking from batching unit can not gather to the pressure that is enough to open one-way valve.
In addition, throttling arrangement can be electronically controlled; So being supplied to the amount of the fuel of high-pressure service pump (, the reciprocating pump of Port-Controlled) can also further be regulated except being regulated by batching unit.
Brief description of the drawings
Different mode of the present invention at length openly and is in the accompanying drawings illustrated in specification.
Fig. 1 shows the schematic diagram of the fuel facility of common rail type fuel injection system according to an embodiment of the invention.
Embodiment
Fig. 1 shows the schematic diagram of the fuel facility of common rail type fuel injection system according to an embodiment of the invention.Fuel facility 100 comprises low pressure pump 2, and described low pressure pump 2 is supplied to high-pressure service pump 6 from fuel tank 4 by filter 8 and batching unit 10 by fuel, the reciprocating pump 6 of for example Port-Controlled.
Batching unit 10 is also referred to as fuel control unit.Batching unit 10 is controlled electronically, regulates the amount of the fuel that is supplied to high-pressure service pump 6 with the pressure based on common rail 12 places.
High-pressure service pump 6 has port, and fuel is provided to described pump 6 by this port from batching unit 10.Described port controlling is to the fuel flow of the pump housing.Piston in high-pressure service pump 6 moves up and down fuel is pressurizeed and be supplied to common rail 12.
The fuel pressure of batching unit 10 based on common rail 12 places and being controlled.In some cases, for example, in the time that automobile is advanced along descending path, do not need to supply fuel to common rail 12.In this case, in the time that the fuel pressure at common rail 12 places is very high, need to close batching unit 10 to cut off the fuel supply to high-pressure service pump 6.For example, do not needing the fuel to high-pressure service pump 6 to supply at once, batching unit 10 is closed.But even after batching unit 10 is fully closed, fuel still may leak from batching unit 10 by the operating clearance of batching unit.
Between the outlet of batching unit 10 and the entrance of high-pressure service pump 6, one-way valve 14 is set.The fuel pressure of the output of one-way valve 14 based on batching unit 10 is optionally supplied fuel to high-pressure service pump 6 from the output of batching unit 10.
Conventionally, one-way valve 14 is in the closed position, thereby does not have the fuel supply to high-pressure service pump 6.Only, in the time that the fuel pressure of the output of batching unit 10 reaches threshold value, one-way valve 14 is just opened.
Therefore the fuel, leaking from batching unit 10 can not arrive high-pressure service pump 6; Thereby avoid the undesired increase of the fuel pressure at common rail 12 places.
In an embodiment of the present invention, one-way valve 14 is integrally arranged on the ingress of high-pressure service pump 6.That is to say, one-way valve 14 is provided as a part for the reciprocating pump 6 of described Port-Controlled.
In another embodiment, one-way valve 14 is integrally arranged on the outlet port of batching unit 10.
Return line 16 is set, and its output terminal by batching unit 10 is connected to fuel tank 4.Return line 16 has throttling arrangement 18.A part for throttling arrangement 18 fuel that self-measuring unit 10 is exported in the future is for being back to fuel tank 4.
In the time that batching unit 10 is closed, fuel still leaks from batching unit 10.Throttling arrangement 18 makes a part for this leaked fuel be back to fuel tank 4.Because the major part of leaked fuel is all returned to fuel tank 4, so may there is hardly build-up pressure to open the chance of one-way valve 14.The remainder of leaked fuel is retained in the path between batching unit 10 and high-pressure service pump 6.But the remainder of leaked fuel is quantitatively considerably less; So can not make pressure increase, thereby can not make one-way valve 14 open.
In addition, in the normal operation period, in the time that batching unit 10 is opened, a throttling arrangement 18 still part for the fuel of the output of self-measuring unit 10 confession is in the future back to fuel tank 4.But the remainder from the fuel of the output of batching unit 10 will reach threshold pressure, and opens one-way valve 14.Therefore, throttling arrangement 18 makes excessive fuel be back to fuel tank 4, and contributes to be adjusted to the fuel supply of high-pressure service pump 6.
In an embodiment of the present invention, throttling arrangement 18 has very little gap, and it is suitably designed to make the major part of the fuel leaking from the output of batching unit 10 to be back to fuel tank 4.
In another embodiment of the present invention, throttling arrangement 18 has variable gap.For example, throttling arrangement 18 can be L shaped lever or swivel plate.Throttling arrangement 18 is rotated pivotly by the fuel flow that enters return line 16.The pressure of the output of the gap therefore, entering for the fuel of fuel tank 4 to be back to based on batching unit 10 and changing.
In another embodiment of the present invention, throttling arrangement 18 is electronic throttle devices 18.The pressure of the output of electronic throttle device 18 based on batching unit 10 is controlled.Electronic throttle device 18 can also be controlled by the pressure based on common rail 12 places.
At the fuel supply control method of below setting forth according to the high-pressure service pump of common rail type fuel injection system of the present invention.
The pressure at rail 12 places is monitored constantly altogether, and the fuel pressure of batching unit 10 based on common rail 12 places is conditioned.In the time that the pressure at common rail 12 places has reached threshold value, batching unit 10 is just fully closed.
Optionally open one-way valve 14 and for example control, to the fuel supply of high-pressure service pump 6 (reciprocating pump 6 of Port-Controlled) by depending on the fuel pressure of output of batching unit 10.Only in the time that the pressure of the output of batching unit 10 reaches threshold value, one-way valve 14 is just opened.Therefore, avoid the undesired increase of the fuel pressure at common rail 12 being caused by the fuel leaking from batching unit 10.Remainder from the fuel of the output of batching unit 10 is optionally back to fuel tank 4 by the throttling arrangement 18 being arranged on return line 16.
Fuel supply control method also comprises: the pressure of the output based on batching unit 10 regulates throttling arrangement 18.Throttling arrangement 18 can also be conditioned by the pressure based on common rail 12 places.
In the time that the pressure at common rail 12 places reaches threshold value, throttling arrangement 18 is little by little opened, thereby makes to stop the fuel supply to pump 6 in the time that the pressure at rail 12 places reaches threshold value altogether.Similarly, in the time that the pressure at common rail 12 places is lower, throttling arrangement 18 is closed so, thereby makes the major part of fuel be provided to pump 6.
Should be appreciated that the embodiment described in above-mentioned explanation is only schematically, and do not limit the scope of the invention.Can predict a lot of such embodiments and described embodiment's other changes and variation.Scope of the present invention is only limited by the scope of claims.
Claims (15)
1. the fuel facility of a common rail type fuel injection system (100), described fuel facility comprises low pressure pump (2), described low pressure pump (2) is supplied to high-pressure service pump (6) from fuel tank (4) by filter (8) and batching unit (10) by fuel, described high-pressure service pump (6) is to common rail (12) supply fuel, it is characterized in that, described fuel facility comprises:
--one-way valve (14), the fuel pressure of the output of described one-way valve (14) based on described batching unit (10) and the fuel of the output from described batching unit (10) is optionally supplied to described high-pressure service pump (6); And
--the output of described batching unit (10) is connected to the return line (16) of described fuel tank (4), described return line (16) has throttling arrangement (18), and a part for the fuel of the output from described batching unit (10) is optionally supplied to described fuel tank (4) by described throttling arrangement (18).
2. fuel facility according to claim 1 (100), wherein, described high-pressure service pump (6) is the reciprocating pump (6) of Port-Controlled.
3. fuel facility according to claim 1 (100), wherein, described one-way valve (14) is integrally arranged on the ingress of described high-pressure service pump (6).
4. fuel facility according to claim 1 (100), wherein, described one-way valve (14) is integrally arranged on the outlet port of described batching unit (10).
5. fuel facility according to claim 1 (100), wherein, described one-way valve (14) is arranged between the outlet of described batching unit (10) and the entrance of described high-pressure service pump (6).
6. fuel facility according to claim 1 (100), wherein, described batching unit (10) is controlled based on the described altogether fuel pressure that rail (12) is located.
7. fuel facility according to claim 1 (100), wherein, when not needing the fuel to described high-pressure service pump (6) to supply at once, described batching unit (10) is closed.
8. fuel facility according to claim 1 (100), wherein, a part for the fuel leaking from described batching unit (10) is supplied to described fuel tank (4) by the described throttling arrangement (18) in described return line (16).
9. according to the fuel facility (100) described in claim 1 and 8, wherein, a part for the fuel that described throttling arrangement (18) supply is leaked from described batching unit (10), thus avoid described one-way valve (14) to be opened.
10. fuel facility according to claim 1 (100), wherein, described throttling arrangement (18) has variable gap.
11. fuel facilitys according to claim 1 (100), wherein, described throttling arrangement (18) is the controlled electronic throttle device of pressure (18) that is suitable for the output based on described batching unit (10).
12. fuel facilitys according to claim 1 (100), wherein, described throttling arrangement (18) is to be suitable for according to the described controlled electronic throttle device of pressure (18) that rail (12) is located altogether.
The fuel supply control method of 13. 1 kinds of high-pressure service pumps for common rail type fuel injection system (6), said method comprising the steps of: monitor the pressure that rail (12) is located altogether; The described altogether pressure that rail (12) is located based on monitored regulates batching unit (10), it is characterized in that described method:
--depend on that the fuel pressure of the output of described batching unit (10) opens the one-way valve (14) of the output that is positioned at described batching unit (10); And
--a part for the fuel of the output of self-measuring unit (10) is optionally back to described fuel tank (4) in the future.
14. fuel supply control methods according to claim 13, also comprise:
--the pressure of the output based on described batching unit (10) regulates the throttling arrangement (18) being arranged on return line (16), and the output of described batching unit (10) is connected to described fuel tank (4) by described return line (16).
15. fuel supply control methods according to claim 13, wherein, regulate described throttling arrangement (18) based on the described altogether pressure that rail (12) is located.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN451/CHE/2013 | 2013-02-01 | ||
| IN451CH2013 IN2013CH00451A (en) | 2013-02-01 | 2013-02-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103967665A true CN103967665A (en) | 2014-08-06 |
Family
ID=51237578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410079546.0A Pending CN103967665A (en) | 2013-02-01 | 2014-01-30 | Fuel supply equipment of common rail type fuel injection system and fuel supply control method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103967665A (en) |
| IN (1) | IN2013CH00451A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499560A (en) * | 2016-12-27 | 2017-03-15 | 清华大学 | Fuel injection equipment (FIE) for automatically controlled single cylinder diesel |
| CN106837627B (en) * | 2016-12-27 | 2018-04-20 | 清华大学 | Electronic control low-pressure oil supply device for single cylinder diesel |
| CN108869126A (en) * | 2017-05-10 | 2018-11-23 | 罗伯特·博世有限公司 | The method and low tension loop of low tension loop for operating in fuel injection system |
| CN111120173A (en) * | 2019-12-31 | 2020-05-08 | 吉利汽车研究院（宁波）有限公司 | High-pressure oil pump fault detection system, high-pressure oil pump fault detection method and vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19630938A1 (en) * | 1996-07-31 | 1998-02-05 | Siemens Ag | Fuel supply line fuel volume-flow control valve |
| JP2009257200A (en) * | 2008-04-17 | 2009-11-05 | Bosch Corp | Fuel supplying device |
| CN101784788A (en) * | 2007-08-23 | 2010-07-21 | 欧陆汽车有限责任公司 | Injection system for an internal combustion engine |
| US20100282214A1 (en) * | 2007-10-22 | 2010-11-11 | Robert Bosch Gmbh | Method for controlling a fuel injection system of an internal combustion engine |
| WO2012065863A1 (en) * | 2010-11-15 | 2012-05-24 | Robert Bosch Gmbh | Low-pressure circuit for a fuel injection system and fuel injection system |
-
2013
- 2013-02-01 IN IN451CH2013 patent/IN2013CH00451A/en unknown
-
2014
- 2014-01-30 CN CN201410079546.0A patent/CN103967665A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19630938A1 (en) * | 1996-07-31 | 1998-02-05 | Siemens Ag | Fuel supply line fuel volume-flow control valve |
| CN101784788A (en) * | 2007-08-23 | 2010-07-21 | 欧陆汽车有限责任公司 | Injection system for an internal combustion engine |
| US20100282214A1 (en) * | 2007-10-22 | 2010-11-11 | Robert Bosch Gmbh | Method for controlling a fuel injection system of an internal combustion engine |
| JP2009257200A (en) * | 2008-04-17 | 2009-11-05 | Bosch Corp | Fuel supplying device |
| WO2012065863A1 (en) * | 2010-11-15 | 2012-05-24 | Robert Bosch Gmbh | Low-pressure circuit for a fuel injection system and fuel injection system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499560A (en) * | 2016-12-27 | 2017-03-15 | 清华大学 | Fuel injection equipment (FIE) for automatically controlled single cylinder diesel |
| CN106837627B (en) * | 2016-12-27 | 2018-04-20 | 清华大学 | Electronic control low-pressure oil supply device for single cylinder diesel |
| CN106499560B (en) * | 2016-12-27 | 2018-04-20 | 清华大学 | Fuel injection equipment (FIE) for automatically controlled single cylinder diesel |
| CN108869126A (en) * | 2017-05-10 | 2018-11-23 | 罗伯特·博世有限公司 | The method and low tension loop of low tension loop for operating in fuel injection system |
| CN108869126B (en) * | 2017-05-10 | 2022-02-22 | 罗伯特·博世有限公司 | Method for operating a low-pressure circuit in a fuel injection system and low-pressure circuit |
| CN111120173A (en) * | 2019-12-31 | 2020-05-08 | 吉利汽车研究院（宁波）有限公司 | High-pressure oil pump fault detection system, high-pressure oil pump fault detection method and vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| IN2013CH00451A (en) | 2015-07-31 |
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Application publication date: 20140806 |