System for diagnosing an internal combustion engine
Patent
·
OSTI ID:6735033
In a system for diagnosing an internal combustion engine having a stater and a starter operation sensor, the improvement is described comprising: a starter operation diagnosing circuit responsive to output voltage of the starter operation sensor and to engine speed for signaling a condition of operation of the starter. The diagnosing circuit produces an output signal when the output voltage exceeds a predetermined range; means for generating a second voltage dependent on the engine speed; a signal generating circuit responsive to the second voltage for producing a fail-safe signal in dependency on a magnitude of the second voltage; and gate means responsive to the fail-safe signal and to the output signal of the diagnosing circuit for providing a signal to operate the engine.
- Assignee:
- Fuji Jukogyo Kabushiki Kaisha, Tokyo
- Patent Number(s):
- US 4646008
- OSTI ID:
- 6735033
- Country of Publication:
- United States
- Language:
- English
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