Method of monitoring the operation of an internal combustion eng

Details Method of monitoring the operation of an internal combustion eng Method of monitoring the operation of an internal combustion eng

1991-11-08

1993-04-13

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Including means responsive to instantaneous change in engine...

123479, 123481, 123630, 731173, F02D 4122, F02P 1700

Patent

active

052012930

ABSTRACT:
A method of monitoring the operation of an internal combustion engine, such as is usable in a motor vehicle, combines the recognition of ignition failures with recognition of combustion failures. In one embodiment combustion failures are detected by the faltering of torque delivered by the engine. Ignition failures are electrically detected in terms of spark voltage or spark duration. In a first embodiment the rate of ignition and combustion failures is first compared with a predetermined threshold and if neither threshold is exceeded, the detection of an individual ignition failure is deemed plausible and is registered if detected. Only a failure rate in excess of a threshold results in cylinder-specific remedial measures to protect a catalyst in the exhaust system. In a second embodiment, unlike the first, only an ignition failure results in a cylinder-selective remedial action.

REFERENCES:
patent: 4003248 (1977-01-01), Leichle
patent: 4023358 (1977-05-01), Maurer et al.
patent: 4691288 (1987-09-01), Kay et al.
patent: 4930481 (1990-06-01), Fujimoto et al.
patent: 4971010 (1990-11-01), Iwata
patent: 5035220 (1991-07-01), Uchinami et al.

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