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:
Feb. 22, 2000
Filed:
Dec. 09, 1998
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A cylinder direct-injection spark-ignition engine using at least a homogeneous combustion mode where early fuel-injection on intake stroke produces a homogeneous air-fuel mixture and a stratified combustion mode where late fuel-injection on compression stroke produces a stratified air-fuel mixture, is equipped with an electronic engine control unit connected to an electronic fuel injection system, an electronic spark-timing control system, and an electronically-controlled throttle valve. The control unit permits switching to a homogeneous combustion mode and changes the manipulated variable for engine torque correction to a spark-timing correction quantity, immediately when the demand for switching from stratified to homogeneous combustion mode occurs during a high-response torque correction. When the demand for switching from homogeneous to stratified combustion mode occurs during the high-response torque correction, switching to the stratified combustion mode is inhibited for a brief time duration until a required torque correction value reaches a predetermined criterion to continue the high-response torque correction based on the spark-timing correction quantity.