Method for controlling a fuel injection system of an internal combustion engine
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60T-007/12
G05D-001/00
G06F-007/00
G06F-017/00
F02D-041/38
F02M-059/36
출원번호
US-0739150
(2008-09-11)
등록번호
US-8793059
(2014-07-29)
우선권정보
DE-10 2007 050 297 (2007-10-22)
국제출원번호
PCT/EP2008/062084
(2008-09-11)
§371/§102 date
20100727
(20100727)
국제공개번호
WO2009/053158
(2009-04-30)
발명자
/ 주소
Albrecht, Oliver
Mueller, Frank
Schroeder, Bernd
Wolber, Jens
Amler, Markus
Hollmann, Timm
Wiedmann, Christian
출원인 / 주소
Robert Bosch GmbH
대리인 / 주소
Kenyon & Kenyon LLP
인용정보
피인용 횟수 :
2인용 특허 :
9
초록▼
In a method for controlling a fuel injection system (10) of an internal combustion engine, wherein the fuel injection system (10) comprises a manifold (24) and a high-pressure pump (20) and a fuel dosing unit (16) is associated with the high-pressure pump (20), wherein the fuel dosing unit (16) cont
In a method for controlling a fuel injection system (10) of an internal combustion engine, wherein the fuel injection system (10) comprises a manifold (24) and a high-pressure pump (20) and a fuel dosing unit (16) is associated with the high-pressure pump (20), wherein the fuel dosing unit (16) controls the amount of fuel delivered, an amount of fuel required for the operation of the internal combustion engine is determined as a function of a correction factor, which is based on a fuel pressure at the inlet of the high-pressure pump (20) and/or on a vapor pressure of the fuel to be delivered.
대표청구항▼
1. A method for controlling a fuel injection system of an internal combustion engine, wherein the fuel injection system comprises a manifold and a high-pressure pump and a fuel dosing unit is associated with the high-pressure pump, comprising: controlling the amount of fuel delivered,wherein control
1. A method for controlling a fuel injection system of an internal combustion engine, wherein the fuel injection system comprises a manifold and a high-pressure pump and a fuel dosing unit is associated with the high-pressure pump, comprising: controlling the amount of fuel delivered,wherein controlling the amount of fuel delivered is performed by the fuel dosing unit;determining an amount of fuel required for the operation of the internal combustion engine as a function of a correction factor,wherein the correction factor is based on a fuel pressure at the inlet of the high-pressure pump and on a vapor pressure of the fuel to be delivered;ascertaining a pressure difference between the fuel pressure at the inlet of the high-pressure pump and the vapor pressure of the fuel to be delivered for determining the correction factor,wherein the high-pressure pump has a delivery chamber with a check valve disposed at the inlet side of said chamber;ascertaining an opening pressure of the check valve for determining the correction factor; andsubtracting the opening pressure of the check valve from the pressure difference to determine a pressure correction value. 2. The method according to claim 1, further comprising: determining a set-point fuel volume to be delivered to the high-pressure pump,wherein the required amount of fuel is determined on the basis of the set-point fuel volume and the correction factor. 3. The method according to claim 2, wherein the correction factor is determined with the aid of a characteristic curve, which defines volume correction values for possible pressure correction values. 4. The method according to claim 1, further comprising: determining an opening cross-section of the control valve, which is adjusted for the delivery of the required amount of fuel, as a function of the correction factor. 5. The method according to claim 4, further comprising: determining an activation signal for the control valve using the opening cross-section of the control valve and a respective actual engine rotational speed. 6. The method according to claim 5, wherein the activation signal is determined with the aid of a characteristic curve, which defines suitable activation signals as a function of possible opening cross-sections and engine rotational speeds. 7. The method according to claim 1, wherein the vapor pressure is ascertained from the actual temperature using at least one reference vapor pressure curve. 8. The method according to claim 1, wherein the vapor pressure is ascertained from an afterstart, a warmup factor, or a factor of a transition compensation. 9. The method according to claim 1, wherein the pre-pressure is decreased from an initial value until the delivery rate of the high pressure pump is zero and the vapor pressure is ascertained from the difference of the pre-pressure and an opening pressure of a check valve of the high-pressure pump. 10. A computer program with program code for carrying out all of the steps according to claim 1, if the program is executed on a computer. 11. An internal combustion engine with a fuel injection system, comprising: a manifold and a high-pressure pump,wherein a fuel dosing unit is associated with the high-pressure pump and the fuel dosing unit controls the amount of fuel delivered;wherein an amount of fuel required for the operation of the internal combustion engine can be determined as a function of a correction factor, which is based on a fuel pressure at the inlet of the high-pressure pump and on a vapor pressure of the fuel to be delivered;wherein a pressure difference between the fuel pressure at the inlet of the high-pressure pump and the vapor pressure of the fuel to be delivered is ascertained for determining the correction factor;wherein the high-pressure pump has a delivery chamber with a check valve disposed at the inlet side of said chamber; andwherein an opening pressure of the check valve is ascertained for determining the correction factor and is subtracted from the pressure difference for determining a pressure correction value.
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이 특허에 인용된 특허 (9)
Ricco, Mario; Borrione, Stefano Maria, Device for controlling the flow of a high-pressure pump in a common-rail fuel injection system of an internal combustion engine.
Erwin Krimmer DE; Rainer Haeberer DE; Helmut Clauss DE; Tilman Miehle DE; Felix Laudaeusser DE; Markus Rueckle DE, Metering unit for a fuel injection system for internal combustion engines.
Joos, Klaus; Wolber, Jens; Frenz, Thomas; Bochum, Hansjoerg; Amler, Markus, Method and device for varying the supply pressure applied to a high pressure pump and generated by a low pressure pump.
Hermann, Dietmar; Reuter, Uwe; van Bebber, David, Method for operating a common rail injection arrangement for an internal combustion engine having a stop-start system.
Hattar, Rafat F.; O'Hear, Brian L.; Baranek, Phillip J.; Shippy, Richard R., System and method for controlling a low pressure pump to prevent vaporization of fuel at an inlet of a high pressure pump.
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