Intake-air control system for engine

Details Intake-air control system for engine Intake-air control system for engine

2006-09-05

2006-09-05

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Adjustable combustion chamber

Piston in head adjusted

Reexamination Certificate

active

07100547

ABSTRACT:
An intake-air control system for an engine enabling an intake-air quantity and a compression ratio to be variably controlled, includes sensors detecting engine operating conditions and the compression ratio, and a control unit electronically connected to the sensors for feedback-controlling the intake-air quantity based on the compression ratio as well as the engine operating conditions, while feedback-controlling the compression ratio based on the engine operating conditions. The control unit executes phase-matching between an intake-air quantity change occurring based on intake-air quantity control and a compression ratio change occurring based on compression ratio control, considering a relatively slower response in the compression ratio change than a response in the intake-air quantity change.

REFERENCES:
patent: 6505582 (2003-01-01), Moteki et al.
patent: 6553949 (2003-04-01), Kolmanovsky et al.
patent: 7-229431 (1995-08-01), None
patent: 2002-21592 (2002-01-01), None

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