Internal-combustion engines – Engine speed regulator – Idle speed control
Reexamination Certificate
2005-09-20
2005-09-20
Mohanty, Bibhu (Department: 3747)
Internal-combustion engines
Engine speed regulator
Idle speed control
C123S406120, C123S406130
Reexamination Certificate
active
06945223
ABSTRACT:
A failure diagnostic apparatus for an intake air stream control valve which is provided in an intake system for an internal combustion engine, and which forms an air stream in the combustion chamber by changing a flow of intake air when the intake air is introduced to the combustion chamber of the internal combustion engine. In the failure diagnostic apparatus, an ignition device is provided in the combustion chamber; an ECU changes ignition timing such that an engine rotational speed of the internal combustion engine becomes equal to a target rotational speed immediately after the engine is started while the engine is cold; and the ECU performs a failure diagnostic control for determining whether a failure has occurred in the intake air stream control valve based on whether the changed ignition timing is different from the reference ignition timing that is a reference for the failure diagnosis.
REFERENCES:
patent: 6601384 (2003-08-01), Isobe et al.
patent: 6647959 (2003-11-01), Noguchi
patent: A 7-83101 (1995-03-01), None
patent: A 9-42041 (1997-02-01), None
patent: A 2001-20782 (2001-01-01), None
Mohanty Bibhu
Toyota Jidosha & Kabushiki Kaisha
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