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. 27, 2018
Filed:
Jun. 16, 2015
Aisan Kogyo Kabushiki Kaisha, Obu-shi, Aichi-ken, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Masakazu Sugishita, Tokai, JP;
Kenji Hashimoto, Nagoya, JP;
AISAN KOGYO KABUSHIKI KAISHA, Obu-shi, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A control device calculates an estimate of negative intake pressure based on the relationship between the rotation speed of a crankshaft and a throttle opening degree (Step S). Then, the control device sets the estimate PE of the negative intake pressure, which is calculated in Step S, to a greater value as combustion efficiency of CNG used in engine operation becomes higher (Step S). When the corrected estimate PE of the negative intake pressure becomes smaller than or equal to a reference value PTh (Step S: YES), the control device starts a negative pressure recovery procedure (Step S).