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:
Mar. 03, 1987
Filed:
Sep. 12, 1985
Mazda Motor Corporation, , JP;
Abstract
An air pollution preventing device having a canister for preventing fuel vapor formed in the fuel tank from escaping into the atmosphere is provided with a feedback control detecting circuit which detects whether the feedback control of the air-fuel ratio of intake mixture is effected, a temperature sensor which detects the fuel temperature and a purge control valve control circuit which receives outputs of the feedback control detecting circuit and the temperature sensor and controls the purge control valve so that the purge control valve is opened to permit introduction of the fuel vapor trapped in the canister only when the feedback control is effected when the fuel temperature is lower than a preset value and is opened irrespective of whether or not the feedback control is effected when the fuel temperature is not lower than the preset value.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile