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:
Oct. 20, 1987
Filed:
Mar. 10, 1986
Kouji Uranishi, Susono, JP;
Takaaki Itou, Mishima, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Abstract
Device for purging evaporated fuel captured by a charcoal canister from a fuel supply system of an engine. A purge path connects the charcoal canister to an engine intake path, an ON-OFF valve and a fixed throttle are arranged in parallel in the purge path, and a solenoid valve is provided in the purge path between the engine intake path and the parallel ON-OFF valve and fixed throttle. The solenoid valve is opened only at low engine speeds and low engine temperatures. The ON-OFF valve is opened at engine loads higher than a predetermined engine load and is closed at engine loads lower than the predetermined engine load. In this way, purging of the evaporated fuel is cut off at low engine speeds and low engine temperatures, purging is occurs small quantity at low engine loads, and purging is increased at high engine loads, providing increased capturing ability of the charcoal canister without impairing drivability.