The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 30, 1988
Filed:
Jul. 01, 1987
Takashi Aramaki, Yokohama, JP;
Nissan Motor Company, Limited, Yokohama, JP;
Abstract
A method and apparatus for diagnosing a presence or absence of failure in an idle switch installed in an internal combustion engine in which, a throttle valve of an internal combustion engine is associated with the idle switch. The throttle valve installed in the engine is usually displaced to a fully closed while the engine at least once is during each period of continuous operation, a counter is advanced whenever the engine has started and is cleared when receiving an activation signal from the idle switch, if the idle switch functions normally, a count value of the counter reaches zero by the time the engine has stopped. If the idle switch fails, the count value is advanced whenever the engine is operated and no signal from the idle switch is received. When the count value reaches a predetermined value, an alarm informing the failure of the idle switch is produced.