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. 04, 1997
Filed:
Aug. 17, 1995
Shuji Yuda, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Abstract
The apparatus is arranged with a duty control valve 21 in a passage 19 for purged gas, connected between a canister 16 which temporarily traps fuel vapor and an air-intake passage 23 of an engine 1. The valve 21 is controlled to open and close at predetermined interval and supplies the purged gas to the air-intake passage 23. The apparatus comprises an interval changing means for changing an ON-OFF interval of the valve 21 shorter than normal at the particular engine operating condition. Another apparatus equipped with a multiple cylinder engine comprises a cylinder selecting means for selecting a cylinder sucking in the largest volume of the purged gas, and a torque fluctuation preventing means for equalizing the combustion pressure in all cylinders of the engine.