Fault detection system for internal combustion engine control ap

Details Fault detection system for internal combustion engine control ap Fault detection system for internal combustion engine control ap

1989-01-12

1989-07-25

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

36443111, F02B 3712

Patent

active

048503258

ABSTRACT:
A fault detection system for detecting a fault of a subcontrol apparatus as well as a main control apparatus backed up thereby in controlling the operation of an actuator for an internal combustion engine control apparatus such as a throttle control apparatus is disclosed. A second fault detection apparatus for the subcontrol apparatus is made up of a CPU consituting the main control apparatus, so that the fault detection apparatus for the subcontrol apparatus operates under condition that the main control apparatus is normal and the engine is preferably under a light load of operation. Each of the main control and the backup subcontrol apparatuses includes a fault detection apparatus, thereby preventing simultaneous fault of the two control apparatuses for improved safety of the vehicle drive.

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