Engine deceleration intake air flow reduction and fuel shut-off

Details Engine deceleration intake air flow reduction and fuel shut-off Engine deceleration intake air flow reduction and fuel shut-off

1992-11-13

1994-08-16

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Responsive to deceleration mode

123327, F02D 3300, F02M 2300

Patent

active

053377150

ABSTRACT:
In an automotive type engine having an air bypass valve controlling a portion of the air flow to the engine, decelerations are controlled in a manner to minimize or eliminate the conventional large feedback negative torque impulse to the operator usually experienced when fuel is shut off. The air bypass valve is closed down, in response to correct decel conditions, to an air flow level below that scheduled to establish the normal idle speed condition. The positive engine combustion torque is decreased so that the magnitude of the ratio between it and the engine negative torque becomes small. Immediately following fuel shut-off, the bypass valve is reopened to return the air flow to that level establishing the set idle speed condition upon resumption of fuel flow.

REFERENCES:
patent: 2064579 (1936-12-01), Werner
patent: 2886020 (1959-05-01), Wolfe
patent: 3349644 (1967-10-01), Gish
patent: 3374991 (1968-03-01), Walker
patent: 3486594 (1969-12-01), Wren, Jr.
patent: 3817229 (1974-06-01), Stumpp
patent: 3906909 (1975-09-01), Garcea
patent: 3948116 (1976-04-01), van Pelt
patent: 4343002 (1981-01-01), Freyer et al.
patent: 4437442 (1984-03-01), Yamaguchi

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