Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1982-09-29
1985-03-05
Cox, Ronald B.
Internal-combustion engines
Charge forming device
Fuel injection system
123494, F02B 300
Patent
active
045024464
ABSTRACT:
A fail-safe system for an engine control system is capable of performing a fail-safe operation when a crank angle sensor fails. When the crank angle sensor malfunctions, at least one of a crank reference signal and a crank position signal will be absent. The fail-safe system prevents the engine from stalling even when one of the crank reference signal and the crank position signal is absent. The fail-safe operation will be carried out when the absence of the crank reference signal and/or the crank position signal is detected. In the fail-safe operation, a fail-safe signal is produced for controlling engine operation as a replacement for an engine control signal from the engine control system under normal conditions. The signal value of the fail-safe signal may be variable in accordance with an engine operating condition derived from an engine control parameter other than the crank angle sensor signals.
REFERENCES:
patent: 3834361 (1974-09-01), Keely
patent: 4207851 (1980-06-01), Crisefi
patent: 4245315 (1981-01-01), Barman et al.
patent: 4255789 (1981-03-01), Hartford et al.
patent: 4370962 (1983-02-01), Hosaka
Hosaka Akio
Kanegae Hidetoshi
Oshiage Katsunori
Yamamoto Akito
Cox Ronald B.
Nissan Motor Company Limited
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