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:
Jan. 07, 2020
Filed:
May. 04, 2018
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Masanobu Kanno, Hiroshima, JP;
Hiroyuki Nishimura, Higashihiroshima, JP;
Kenji Tanimura, Hiroshima, JP;
Kenta Ando, Hiroshima, JP;
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Abstract
A NOcatalyst is provided on an exhaust passage of an engine. The NOcatalyst reduces the occluded NOwhen an air-fuel ratio of exhaust gas is in the vicinity of a stoichiometric air-fuel ratio or in a richer state than the stoichiometric air-fuel ratio. Turbocharging is executed by turbochargers. In a low load region within the reduction execution region, a target air-fuel ratio is achieved, as required for NOreduction, by air amount adjustment with an air amount control valve provided on an intake passage. Since a large amount of air is needed in the high load region within the reduction execution region, the target air-fuel ratio is achieved by air amount adjustment using turbocharging pressure control.