Patent Number: 6,805,100

Title: Combustion control apparatus and combustion control method for in-cylinder injection internal combustion engine

Abstract: With regard to a stabilization control which is executed while compression stroke injection is executed in an engine warming-up process, an execution period of the stabilization control is limited to a period until when an elapsed time since an engine is started reaches a predetermined time. Accordingly, after the elapsed time reaches a predetermined time, it is possible to suppress an unnecessary increase in a fuel injection amount or unnecessary advance of ignition timing by the stabilization control. Also, when an increase in the temperature of a catalyst is completed in the engine warming-up process, and a fuel injection mode is switched from the compression stroke injection to intake stroke injection, the stabilization control is restarted. Therefore, when the combustion becomes unstable due to use of heavy fuel and the engine speed drops while that intake stroke injection is executed, the combustion is stabilized by increasing the fuel injection amount and advancing the ignition timing by the stabilization control.

Inventors: Morita; Koji (Mishima, JP)

Assignee: Toyota Jidosha Kabushiki Kaisha

International Classification: F02D 41/08 (20060101); F02D 41/06 (20060101); F02D 41/30 (20060101); F02P 5/15 (20060101); F02B 23/10 (20060101); F02B 75/12 (20060101); F02B 75/00 (20060101); F00M 007/00 ()

Expiration Date: 10/19/2021