Fail-safe system for throttle valve controller

Details Fail-safe system for throttle valve controller Fail-safe system for throttle valve controller

1991-03-07

1992-03-03

Wolfe, Willis R.

Internal-combustion engines

Engine speed regulator

Having condition responsive means with engine being part of...

123399, F02D 910, F02D 4114

Patent

active

050922980

ABSTRACT:
In a throttle valve controller for controlling the opening and closing of a throttle valve in an internal combustion engine, the state of the throttle valve entering a sticking is detected from a difference between a target throttle valve opening degree and an actual throttle valve opening degree. When the throttle valve enters its sticking state, the amount of decrement in the output from the engine is calculated based on the current operational condition of the engine and an estimated value for the operational condition of the engine after elimination of the sticking. When the elimination of the sticking is detected on the basis of a sudden variation in throttle valve opening degree, the output from the engine is reduced by fuel cut on the basis of the amount of decrement in engine output. This prevents occurence of a sudden variation in output torque of the engine, which may otherwise be produced as a result of elimination of the sticking.

REFERENCES:
patent: 4488527 (1984-12-01), Pfalzgraf et al.
patent: 4519360 (1985-05-01), Murakami
patent: 4612615 (1986-09-01), Murakami
patent: 4854283 (1989-08-01), Kiyono et al.
patent: 4909213 (1990-03-01), Mezger et al.

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