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. 20, 1996
Filed:
May. 26, 1995
Yoichiro Yamagishi, Atsugi, JP;
Unisia Jecs Corporation, Atsugi, JP;
Abstract
In a method and apparatus for diagnosing a trouble in supercharging pressure defecting means in an internal combustion engine which is provided with a throttle valve at the downstream side of a compressor of a supercharger and a means for detecting a supercharging pressure, the trouble of the supercharging pressure detecting means is diagnosed based on the variation in the detecting value of the supercharging pressure upon at the transient operation of the engine, or by comparing the flow rate of an intake air detected at the upstream side of the compressor, the flow rate of an intake air calculated based on the variation in the supercharging pressure during the transient operation of the engine, and the detecting values of the flow rate of an intake air. Thus, the trouble of the supercharging pressure detecting means can be diagnosed based on the detecting values during the transient operation of the engine only with a software processing and without setting a particular diagnosis period.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile