IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0141627
(2009-12-17)
|
등록번호 |
US-8505367
(2013-08-13)
|
우선권정보 |
DE-10 2009 000 134 (2009-01-09) |
국제출원번호 |
PCT/EP2009/067377
(2009-12-17)
|
§371/§102 date |
20110901
(20110901)
|
국제공개번호 |
WO2010/079073
(2010-07-15)
|
발명자
/ 주소 |
- Porten, Guido
- Chen, Lu
- Schott, Marc
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
7 |
초록
▼
A device, a method, a computer program and a computer program product for diagnosing an internal combustion engine (100), in which a first cylinder (102) includes a combustion chamber (101), a fuel quantity and a fresh air quantity being supplied to the combustion chamber (101) for combustion; a tor
A device, a method, a computer program and a computer program product for diagnosing an internal combustion engine (100), in which a first cylinder (102) includes a combustion chamber (101), a fuel quantity and a fresh air quantity being supplied to the combustion chamber (101) for combustion; a torque contribution (D), generated by the combustion, of the first cylinder (102) in a first operating mode (B1) of the internal combustion engine (100) being a function of the fresh air quantity supplied, and in a second operating mode (B2) of the internal combustion engine (100) being essentially a function of the fuel quantity, wherein a first variable (L1) characterizing a smooth running of the internal combustion engine (100) in the first operating mode (B1) is ascertained, a second variable (L2) characterizing the smooth running of the internal combustion engine (100) in the second operating mode is ascertained, the first variable (L1) is compared to the second variable (L2), a diagnosis of the internal combustion engine (100) is made as a function of the result of the comparison.
대표청구항
▼
1. A method for diagnosing an internal combustion engine, in which a cylinder includes a combustion chamber, a fuel quantity and a fresh air quantity being supplied to the combustion chamber for the combustion to generate a torque contribution of the cylinder, which torque contribution is, in a firs
1. A method for diagnosing an internal combustion engine, in which a cylinder includes a combustion chamber, a fuel quantity and a fresh air quantity being supplied to the combustion chamber for the combustion to generate a torque contribution of the cylinder, which torque contribution is, in a first operating mode of the internal combustion engine, essentially a function of the fresh air quantity supplied, and, in a second operating mode of the internal combustion engine, essentially a function of the fuel quantity supplied, the method comprising: ascertaining a first variable characterizing a smooth running of the internal combustion engine in the first operating mode;ascertaining a second variable characterizing the smooth running of the internal combustion engine in the second operating modecomparing the first variable to the second variablediagnosing the internal combustion engine as a function of the result of the comparison; andrecognizing an erroneously supplied fresh air quantity if a third variable, that is a function of the absolute amount of the difference between the first variable and the second variable, is greater than a specified value. 2. The method as recited in claim 1, wherein the first variable and the second variable are ascertained at least partially during a power stroke of the cylinder. 3. The method as recited in claim 2, wherein, in the first operating mode, a first fuel quantity is injected; and, in the second operating mode, a second fuel quantity and a third fuel quantity are injected. 4. The method as recited in claim 2, wherein the second fuel quantity is determined in the second operating mode so that a lean mixture is created. 5. The method as recited in claim 2, wherein a correction of the supplied fuel quantity takes place if the third variable, that is a function of the absolute amount of the difference between the first variable and the second variable, is less than or equal to a specified threshold. 6. The method as recited in claim 5, wherein a value for the correction is ascertained in the second operating mode. 7. The method as recited in claim 1, wherein, in the first operating mode, a first fuel quantity is injected; and, in the second operating mode, a second fuel quantity and a third fuel quantity are injected. 8. The method as recited in claim 7, wherein the second fuel quantity is determined in the second operating mode so that a lean mixture is created. 9. The method as recited in claim 7, wherein the third fuel quantity is determined so that the lambda value of the exhaust gas is essentially one. 10. The method as recited in claim 7, wherein a correction of the supplied fuel quantity takes place if the third variable, that is a function of the absolute amount of the difference between the first variable and the second variable, is less than or equal to a specified threshold. 11. The method as recited in claim 10, wherein value for the correction is ascertained in the second operating mode. 12. The method as recited in claim 1, wherein the second fuel quantity is determined in the second operating mode so that a lean mixture is created. 13. The method as recited in claim 12, wherein a correction of the supplied fuel quantity takes place if the third variable, that is a function of the absolute amount of the difference between the first variable and the second variable, is less than or equal to a specified threshold. 14. The method as recited in claim 13, wherein the ascertainment of a correction value of the fuel quantity supplied takes place in the second operating mode. 15. The method as recited in claim 1, wherein a correction of the supplied fuel quantity takes place if the third variable, that is a function of the absolute amount of the difference between the first variable and the second variable, is less than or equal to a specified threshold. 16. The method as recited in claim 15, wherein a value for the correction is ascertained in the second operating mode. 17. An apparatus for diagnosing an internal combustion engine, in which a cylinder includes a combustion chamber, a fuel quantity and a fresh air quantity being supplied to the combustion chamber for combustion to generate a torque contribution of the cylinder, which torque contribution is, in a first operating mode of the internal combustion engine, essentially a function of the fresh air quantity supplied, and, in a second operating mode of the internal combustion engine, essentially a function of the fuel quantity supplied, the apparatus comprising: a first ascertainment device which is configured to ascertain a first variable characterizing the smooth running of the internal combustion engine in the first operating mode;a second ascertainment device which is configured to ascertain a second variable characterizing the smooth running of the internal combustion engine in the second operating mode;a comparator device which is configured to compare the first variable to the second variable; anda calculating device which is configured to diagnose the internal combustion engine as a function of the result of the comparison, wherein an erroneously supplied fresh air quantity is recognized if a third variable, that is a function of the absolute amount of the difference between the first variable and the second variable, is greater than a specified value. 18. A non-transitory computer-readable data storage medium on which are stored instructions that are executable on a computer, and which, when executed on the computer, performs a method for diagnosing an internal combustion engine, in which a cylinder includes a combustion chamber, a fuel quantity and a fresh air quantity being supplied to the combustion chamber for the combustion to generate a torque contribution of the cylinder, which torque contribution is, in a first operating mode of the internal combustion engine, essentially a function of the fresh air quantity supplied, and, in a second operating mode of the internal combustion engine essentially a function of the fuel quantity supplied, the method comprising: ascertaining a first variable characterizing a smooth running of the internal combustion engine in the first operating modeascertaining a second variable, characterizing the smooth running of the internal combustion engine in the second operating mode;comparing the first variable to the second variable;diagnosing of the internal combustion engine as a function of the result of the comparison; andrecognizing an erroneously supplied fresh air quantity if a third variable, that is a function of the absolute amount of the difference between the first variable and the second variable, is greater than a specified value.
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