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Title:
成層燃焼内燃機関の燃焼制御装置
Document Type and Number:
Japanese Patent JP3317228
Kind Code:
B2
Abstract:
An apparatus and method for controlling combustion of an engine. The engine has a throttle valve (23) located in an intake duct connected to combustion chambers (5), and a brake booster (71) actuated by vacuum supplied by the intake duct. During stratified charge combustion, if vacuum supplied to the brake booster (71) is insufficient, an ECU (30) decreases the opening of the throttle valve (23) thereby increasing the vacuum. The ECU (30) switches the combustion mode to stratified charge combustion if a target injection amount, which corresponds to load applied to the engine, is equal to or smaller than a predetermined value. When the target injection amount is greater than the value, the ECU (30) switches the combustion mode to homogeneous charge combustion. During stratified charge combustion, the ECU (30) sets the determination value to a smaller value when an operation for producing vacuum is performed than when the operation is not performed. This procedure improves fuel economy.

Inventors:
水野 宏幸
高橋 淳
Application Number:
JP1715698A
Publication Date:
August 26, 2002
Filing Date:
January 29, 1998
Export Citation:
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Assignee:
トヨタ自動車株式会社
International Classes:
B60T17/00; F02B17/00; F02D29/02; F02D41/00; F02D41/02; F02D41/04; F02D41/30; (IPC1-7): F02D41/04; B60T17/00; F02D29/02; F02D41/02
Attorney, Agent or Firm:
恩田 博宣



 
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