Apparatus for detecting malfunction in cyclically repetitive pro

Details Apparatus for detecting malfunction in cyclically repetitive pro Apparatus for detecting malfunction in cyclically repetitive pro

1982-09-24

1984-04-24

Myracle, Jerry W.

Measuring and testing

Vehicle chassis

Steering

371 9, G01M 1500

Patent

active

044440480

ABSTRACT:
Repetitive processes in internal combustion engines which are dependent upon the values of particular parameters are controlled either by a main computer or an auxiliary computer. Switching from the main to the auxiliary computer takes place if a sequence error detecting stage detects errors in the desired alternation between the main control signals furnished by the main computer and reference mark signals indicative of predetermined angular positions of a shaft of the engine. Specifically, the system is switched to operate under control of the auxiliary computer if such an alternation error occurs again within a predetermined number of cycles. The switching can also take place as a result of missing reference mark signals and as a result of the absence of monitoring signals indicative of correct operation of the main computer program.

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