Apparatus for controlling vehicle engine-braking force upon shif

Details Apparatus for controlling vehicle engine-braking force upon shif Apparatus for controlling vehicle engine-braking force upon shif

1996-09-26

1998-06-30

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Transmission control

Engine controlled by transmission

477118, B60K 4106

Patent

active

057725543

ABSTRACT:
Apparatus for controlling an engine-braking force to be applied to a motor vehicle, including (a) a throttle valve drive device for operating a throttle valve to change an amount of opening of the throttle valve, (b) a throttle opening control device which is operated upon a manual shift-down action of the automatic transmission as a result of operation of an operator's controlled member, for increasing the amount of opening of the throttle valve to temporarily increase an engine speed to a level which is expected to be established after the manual shift-down action, so as to assure smooth application of engine braking to the motor vehicle, and (c) a throttle opening control enabling/disabling device for inhibiting an operation of the throttle opening control means when a predetermined condition is satisfied after completion of the manual shift-down action of the automatic transmission, and permitting the operation of the throttle opening control means when the predetermined condition is not satisfied. For example, the throttle opening control enabling/disabling device inhibits the operation of the throttle opening control device if the operation of the throttle opening control device to reduce the throttle valve opening is delayed.

REFERENCES:
patent: 4523667 (1985-06-01), Smyth
patent: 4785691 (1988-11-01), Papenhagen et al.
patent: 4891759 (1990-01-01), Kato
patent: 5441464 (1995-08-01), Markyvech

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