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:
Jan. 08, 2008
Filed:
May. 18, 2006
Keiji Wakahara, Inazawa, JP;
Keiji Wakahara, Inazawa, JP;
Denso Corporation, Kariya, Aichi-pref., JP;
Abstract
An evaporated gas control system mounted on an automotive vehicle includes a canister for absorbing gas evaporated from a fuel tank and a purging passage for purging the evaporated gas into an engine. The purging passage is branched out to two passages, an upstream purging passage connected to an upstream portion of a throttle valve through an upstream valve and a downstream purging passage connected to a downstream portion of the throttle valve. Malfunction of the upstream purging passage including the upstream valve is detected based on changes in pressure of the air intake passage, which are responsive to opening and closing operations of the upstream valve. Preferably, the malfunction detecting process is performed by operating the upstream valve from a fully closed state to a fully open state under the condition where the throttle valve is fully closed.