Device for coping with sensor abnormal state in electronic contr

Details Device for coping with sensor abnormal state in electronic contr Device for coping with sensor abnormal state in electronic contr

1995-07-03

1996-09-03

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Open loop condition responsive

123479, F02D 4122

Patent

active

055513964

ABSTRACT:
A device for coping with a sensor abnormal state in an electronic control system in an internal combustion engine in which a predetermined operation control device is controlled in response to detection signals obtained from various engine sensors. The device includes an engine speed sensor and a temperature sensor. A discriminator determines that the temperature sensor is abnormal when a state, in which engine speed N.sub.E is less than a predetermined value n.sub.A and concurrently temperature T.sub.W is less than a predetermined value T.sub.A -.DELTA..sub.A, continues for a predetermined time tm.sub.DT. The detected temperature value T.sub.W is corrected to a larger value provisionally to decrease the rotational speed N.sub.E of the engine when the abnormal state is indicated.

REFERENCES:
patent: 4274381 (1981-06-01), Abo
patent: 4450812 (1984-05-01), Otsuka et al.

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