IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0593593
(2006-02-24)
|
등록번호 |
US-7536997
(2009-07-01)
|
우선권정보 |
DE-10 2005 014 093(2005-03-29) |
국제출원번호 |
PCT/EP06/060251
(2006-02-24)
|
§371/§102 date |
20061005
(20061005)
|
국제공개번호 |
WO06/103147
(2006-10-05)
|
발명자
/ 주소 |
- Koehler, Christian
- Schnell, Ruediger
- Hollmann, Timm
- Lamirand, Yves
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
5 |
초록
▼
In a method for operating an internal combustion engine (10) equipped with a piston pump as a high-pressure pump (18), which is driven by a drive shaft (28) of the engine (10), in which the high-pressure pump (18) delivers fuel from a low-pressure region (16) to a high-pressure side (38) and a quant
In a method for operating an internal combustion engine (10) equipped with a piston pump as a high-pressure pump (18), which is driven by a drive shaft (28) of the engine (10), in which the high-pressure pump (18) delivers fuel from a low-pressure region (16) to a high-pressure side (38) and a quantity control valve (44) sets the quantity of fuel delivered by the high-pressure pump (18), the acoustic emission of the high-pressure pump is reduced by virtue of the fact that the high-pressure pump (18) functions in a two-point operation, alternating between full delivery for individual or successive piston strokes and idle delivery for individual or successive piston strokes and, when the pressure falls below a lower pressure threshold, the full delivery is activated until an upper pressure threshold is reached.
대표청구항
▼
What is claimed is: 1. A method for operating an internal combustion engine (10) equipped with a piston pump as a high-pressure pump (18), which is driven by a drive shaft (28) of the engine (10); the high-pressure pump (18) delivers fuel from a low-pressure region (16) to a high-pressure side (38)
What is claimed is: 1. A method for operating an internal combustion engine (10) equipped with a piston pump as a high-pressure pump (18), which is driven by a drive shaft (28) of the engine (10); the high-pressure pump (18) delivers fuel from a low-pressure region (16) to a high-pressure side (38) and a quantity control valve (44) sets the quantity of fuel delivered by the high-pressure pump (18), wherein the high-pressure pump (18) functions in a two-point operation, alternating between full delivery for one of individual and successive piston strokes and idle delivery for individual or successive piston strokes and, when the pressure falls below a lower pressure threshold, the full delivery is activated until an upper pressure threshold is reached. 2. The method as recited in claim 1, wherein the two-point operation is activated when one of the engine speed falls below a minimum speed and the injection quantity falls below a minimum quantity. 3. The method as recited in claim 1, wherein above the minimum speed, the high-pressure pump (18) is operated with partial delivery. 4. The method as recited in claim 1, wherein after the upper pressure threshold has been reached, the high-pressure pump (18) is switched into idle delivery mode until the pressure falls below the lower pressure threshold again. 5. The method as recited in claim 1, wherein the high-pressure pump (18) is operated in full delivery mode when the quantity control valve (44) is closed and is operated in the partial delivery mode when the quantity control valve (44) is intermittently or continuously open. 6. The method as recited in claim 1, wherein the quantity control valve (44) remains open down to a lower pressure threshold and then, when the lower pressure threshold has been reached, is closed until an upper threshold is reached. 7. The method as recited in claim 1, wherein the quantity control valve (44) is opened when the upper pressure threshold is reached. 8. An internal combustion engine (10) equipped with a piston pump as a high-pressure pump (18), which is driven by a drive shaft (28) of the engine (10); the high-pressure pump (18) delivers fuel from a low-pressure region (16) to a high-pressure side (38) and a quantity control valve (44) sets the quantity of fuel delivered by the high-pressure pump (18), wherein the high-pressure pump (18) functions in a two-point operation, alternating between full delivery for one of individual and successive piston strokes and idle delivery for individual or successive piston strokes and, when the pressure falls below a lower pressure threshold, the full delivery is activated until an upper pressure threshold is reached. 9. A control unit for an internal combustion engine, wherein the internal combustion engine (10) is equipped with a piston pump as a high-pressure pump (18), which is driven by a drive shaft (28) of the engine (10); the high-pressure pump (18) delivers fuel from a low-pressure region (16) to a high-pressure side (38) and a quantity control valve (44) sets the guantity of fuel delivered by the high-pressure pump (18), wherein the high-pressure pump (18) functions in a two-point operation, alternating between full delivery for one of individual and successive piston strokes and idle delivery for individual or successive piston strokes and, when the pressure falls below a lower pressure threshold, the control unit activates full delivery until an upper pressure threshold is reached. 10. A piece of software for a stored program control unit for an internal combustion engine, wherein the software is able to execute a method for operating an internal combustion engine (10) eguipped with a piston pump as a high-pressure pump (18), which is driven by a drive shaft (28) of the engine (10); the high-pressure pump (18) delivers fuel from a low-pressure region (16) to a high-pressure side (38) and a guantity control valve (44) sets the quantity of fuel delivered by the high-pressure pump (18), wherein the high-pressure pump (18) functions in a two-point operation, alternating between full delivery for one of individual and successive piston strokes and idle delivery for individual or successive piston strokes and, when the pressure falls below a lower pressure threshold, the full delivery is activated until an upper pressure threshold is reached.
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