Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2005-12-20
2005-12-20
Kwon, John T. (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S680000, C073S117020
Reexamination Certificate
active
06976475
ABSTRACT:
In a combustion engine, the fuel quantity is determined as a function of the inflowing air mass. As a measure for the inflowing air mass, one uses either a main load signal, which is generated by an air-mass flow sensor and represents a measure of the inflowing air mass, or a secondary load signal, which is generated as a function of the degree of throttle of a throttle device in the intake port and of the speed of the combustion engine, to correct the secondary load signal, an air-mass compensation quantity being utilized. The air-mass compensation quantity is generated in operating phases in which the correctness of the main load signal may be assumed, by comparing the main load signal with the secondary load signal. In the case of a leakage of the intake port between the air-mass flow sensor and the throttle device, the main load signal changes, but not the secondary load signal, so that, by evaluating the air-mass compensation quantity, which in such a case assumes an unusual value, a leakage in this section of the intake port may be recognized.
REFERENCES:
patent: 5357932 (1994-10-01), Clinton et al.
patent: 6615812 (2003-09-01), Wild et al.
patent: 6644284 (2003-11-01), Pfitz
patent: 43 22 281 (1995-01-01), None
patent: 197 50 191 (1999-03-01), None
patent: 199 41 006 (2001-03-01), None
patent: 100 28 878 (2001-12-01), None
“Air Leak Detector for IC Engine—Uses Speed-Density-Correction Factor as Ratio of Mass-Air Flow Estimate to Speed-Density Estimate of Mass of Air Entering Cylinder to Indicate Air Leak,” AN 1995-128963/17 WPIDS, DNN N1995-10149, PI RD 368014, Thomson Derwent.
Bergmann Helge
Kirschke Frank
Kenyon & Kenyon
Kwon John T.
Volkswagen AG
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