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. 19, 2002
Filed:
Sep. 11, 2000
Hirofumi Nishimura, Fuchu-cho, JP;
Mazda Motor Corporation, Hiroshima -ken, JP;
Abstract
A control system is adapted for a direct injection engine of spark ignition type provided with an exhaust gas purifying catalyst in an exhaust passage, a fuel injection valve for directly spraying fuel into combustion chambers, a sparking plug having an electrode projecting into the combustion chamber. The control system includes an intake air amount controller for controlling the amount of intake air to be admitted into the combustion chambers, and a fuel injection controller for carrying out stratified combustion in a stratified combustion region set in a low engine load region while carrying out uniform combustion in a uniform combustion region set in a high engine load region. When the intake air amount controller executes a control to reduce the amount of intake air in the stratified combustion region when the engine is warm, and the fuel control system advances the fuel injection starting timing within a compression stroke and sets a degree of advancement within such a range where stratified combustion can be maintained. Accordingly, deterioration of combustibility can be effectively prevented when the intake air amount controller executes the control to reduce the amount of intake air in the stratified combustion region.