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. 28, 2021
Filed:
Oct. 12, 2017
Nissan Motor Co., Ltd., Yokohama, JP;
Morihiro Nagamine, Kanagawa, JP;
Hiromu Terai, Kanagawa, JP;
Takeshi Watanabe, Kanagawa, JP;
Atsushi Teraji, Kanagawa, JP;
Hiroyuki Suzuki, Kanagawa, JP;
NISSAN MOTOR CO., LTD., Yokohama, JP;
Abstract
A hybrid vehicle has an engine (E) that is capable of changing a combustion mode between a stoichiometric combustion mode and a lean combustion mode and a motor/generator (MG) that is capable of performing torque assist by a power running operation and torque absorption by a regenerative operation. As a boundary between a stoichiometric combustion operating region and a lean combustion operating region, a second boundary (L) at a torque decrease has a hysteresis at a low torque side with respect to a first boundary (L) at a torque increase. Upon shift from the stoichiometric combustion operating region to the lean combustion operating region, for delay in increase of an intake-air quantity, decrease in fuel and the torque assist by the motor/generator (MG) are carried out, and an exhaust air-fuel ratio is changed stepwise.