Control device for internal combustion engine

Details Control device for internal combustion engine Control device for internal combustion engine

2005-09-09

2008-07-08

Wolfe, Jr., Willis R. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C701S108000, C701S110000, C123S568210

Reexamination Certificate

active

07398148

ABSTRACT:
The valve timing is changed to increase the internal EGR amount the moment a fuel cut process begins (FIG.2C). Before a sufficient amount of internal EGR is obtained, control is exercised so that the throttle-opening angle TA is larger than a basic idle-opening angle TA0. When a sufficient amount of internal EGR is obtained, control is exercised so that the throttle-opening angle TA is smaller than the basic idle-opening angle TA0(FIG.2D). The increase in the internal EGR amount is rendered smaller during fuel cut at a low rotation speed than during fuel cut at a high rotation speed. In addition, the amount of decrease in the throttle-opening angle TA is rendered smaller during fuel cut at a low rotation speed than during fuel cut at a high rotation speed.

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