Intake-air quantity control system of engine

Details Intake-air quantity control system of engine Intake-air quantity control system of engine

2008-01-29

2008-01-29

Kwon, John T. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C123S674000, C123S681000, C123S321000

Reexamination Certificate

active

07324889

ABSTRACT:
In an intake-air quantity control system of an engine employing a variable valve operating device capable of controlling a cylinder intake-air quantity by variable control of an operating characteristic of an intake valve, in a normal intake-valve operating mode a target operating characteristic of the intake valve is determined based on a target cylinder intake-air quantity calculated based on a target engine torque. In a predetermined high-load range, in particular, at full-load operation, the target operating characteristic is switched to a high-load period valve operating characteristic, preset to be suitable for the predetermined high-load range.

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