Method and apparatus for throttle valve control in internal comb

Details Method and apparatus for throttle valve control in internal comb Method and apparatus for throttle valve control in internal comb

1990-03-23

1991-05-28

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Open loop condition responsive

123361, F02D 902, F02D 908

Patent

active

050184962

ABSTRACT:
Throttle valve assembly having a servomotor to control the closure of the throttle valve flap in the range of from 0.degree. to about 4.degree.-15.degree. in accord with predetermined criteria. Wider opening is controlled by the driver actuating the gas pedal. Upon sudden release of the gas pedal, mechanical linkage permits the throttle flap to close to a preset opening in the range of approximately 4.degree.-15.degree., and thereafter the servo permits delayed or timed closing to 0.degree. (plus idle setting). A setting control unit is provided to permit a full range of idle control adjustments. The setting control unit also provides a solenoid stop in the event of failure of the servo motor, and also for cruise control setting. Desired value and actual throttle opening value transmitters provide signals to a microprocessor which integrates the information into control of the servo and the stop assembly solenoid. The servo also prevents stalling and hesitation upon rapid depressing of the gas pedal through preprogrammed opening of the throttle by means of the servo. The microprocessor can also control the throttle based on additional inputs from engine operating conditions, load conditions, wheel spin, angle slip, and the like, to provide optimum engine operation and fuel economy.

REFERENCES:
patent: 4785782 (1988-11-01), Tanaka et al.
patent: 4860708 (1989-08-01), Yamaguchi et al.
patent: 4879657 (1989-11-01), Tamura et al.

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