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:
Jul. 12, 1994
Filed:
Aug. 14, 1992
Shiro Saito, Yabuzuka, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
In a fuel supply system for a motor vehicle wherein a solenoid valve is interposed in an air breather pipe by which fuel vaporized in a fuel tank is introduced into a canister, and the solenoid valve is opened by an ON signal of a fuel flap switch which turns ON when a fuel flap is opened, so as to bring the air breather pipe into communication from the fuel tank to the canister, thereby permitting the fuel tank to be fueled; a safety circuit for a fuel supply system of a motor vehicle comprising the fact that a solenoid valve driving circuit which extends from a power source to an earth through the fuel flap switch as well as the solenoid valve is provided with a first relay of normally-closed type to turn OFF in an ON state of a boost switch which turns ON when a stop of an engine is detected in an ON state of an ignition key switch, and that an ignition coil driving circuit which extends from the power source to the earth through the ignition key switch as well as an ignition coil is provided with a second relay of normally-closed type to turn OFF during energization of the solenoid valve driving circuit, whereby the fuel tank can be fueled only when the engine is stopped.