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:
Dec. 22, 2020
Filed:
Jul. 19, 2017
Nissan Motor Co., Ltd., Yokohama, JP;
Atsushi Maekawa, Kanagawa, JP;
Kenji Suzuki, Kanagawa, JP;
Kentaro Yamano, Kanagawa, JP;
Takeshi Miyamoto, Kanagawa, JP;
Tomoki Itou, Kanagawa, JP;
Taichi Andou, Kanagawa, JP;
Toshio Hashimoto, Kanagawa, JP;
Akio Ashikaga, Kanagawa, JP;
NISSAN MOTOR CO., LTD., Yokohama, JP;
Abstract
When atmospheric pressure (Pa) which varies according to altitude is higher than a predetermined pressure threshold (Path) during idle operation in which catalyst warm-up request is issued, an intake pressure is controlled, through a throttle valve (), to an intake pressure at which an intake air amount required to promote the warm-up of a catalyst converter () is obtained. When the atmospheric pressure (Pa) is lower than the predetermined pressure threshold (Path), the intake pressure is controlled, through a throttle valve (), to an intake pressure (Pa−Pb) at which a differential pressure (Pb) required by a brake booster () is obtained. Accordingly, negative pressure in the brake booster () can be secured while promoting the warm-up of the catalyst during the idle operation.