Air flow control apparatus for internal combustion engine

Details Air flow control apparatus for internal combustion engine Air flow control apparatus for internal combustion engine

1984-08-01

1985-06-11

Dolinar, Andrew M.

Internal-combustion engines

Engine speed regulator

Idle speed control

123585, 123588, F02D 3302

Patent

active

045221766

ABSTRACT:
In an air flow control apparatus for controlling an amount of air flow under control of a throttle valve in an engine, a sensor produces a first signal indicative of engine operation, and another sensor produces a second signal indicative of the atmospheric pressure. A microcomputer determines whether or not the first signal indicates an idling condition of the engine. If so, the microcomputer calculates, in dependence upon the first signal, a first parameter indicative of an amount of the air flow necessary for maintaining a desired idling condition of the engine. If not, the microcomputer calculates, in dependence upon the first signal, a second parameter indicative of an amount of the air flow related to loaded condition of the engine. Furthermore, the microcomputer calculates, in dependence upon the second signal, a third parameter indicative of an additional amount of the air flow related to the atmospheric pressure to compensate the second parameter and produces first and second output signals respectively indicative of the first and compensated second parameters. An electrically operated valve is responsive to the first and second output signals for controlling an amount of the air flow respectively related to idling and loaded conditions of the engine.

REFERENCES:
patent: 3964457 (1976-06-01), Coscia
patent: 4344399 (1982-08-01), Matsumura et al.
patent: 4475504 (1984-10-01), Mizuno

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