Trouble detecting apparatus for a sensor in an internal combustion engine system

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United States of America Patent

PATENT NO 4517831
SERIAL NO

06554606

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Abstract

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A trouble detecting apparatus for a signal generator for generating a signal whose period changes in accordance with the speed of an internal combustion engine has a detector for detecting whether or not the period of the signal exceeds a predetermined time and a speed detector responsive to the signal for computing the engine speed. The result of the computation in the speed detector just before the period of the signal exceeds the predetermined time is compared with a reference engine speed which is set to a speed at which the engine cannot rotate stably under ordinary conditions, and it is discriminated whether or not the signal generator is defective on the basis of the result of the comparison.

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Patent Owner(s)

  • DIESEL KIKI CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hirano, Yutaka Higashimatsuyama, JP 34 491

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