Cylinder deactivation engine control system with torque matching
AssigneeGeneral Motors Corporation
InventorAllen B. Rayl
Life of this patent
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Abstract
An engine control system and method smoothes torque during transitions in a displacement on demand engine. A torque loss estimator generates a torque loss signal based on torque loss due to at least one of friction, pumping and accessories. A pedal torque estimator generates a pedal torque signal. An idle torque estimator generates an idle torque signal. A summing circuit generates a difference between the pedal torque signal and the idle torque and the torque loss signals and outputs a desired brake torque signal.
Claims25
An engine control system for smoothing torque during transitions in a displacement on demand engine, comprising:
- a torque loss estimator that generates a torque loss signal based on torque loss due to at least one of friction, pumping and accessories;
- a pedal torque estimator that generates a desired pedal torque signal;
- an idle torque estimator that generates a desired idle torque signal;
- and
- a summing circuit that generates a difference between said pedal torque signal and said idle torque and said torque loss signals and that outputs a desired brake torque signal.
A method for smoothing torque during transitions in a displacement on demand engine, comprising:
- generating a torque loss signal based on torque loss due to at least one of friction, pumping and accessories;
- generating a desired pedal torque signal;
- generating a desired idle torque signal;
- and
- generating a difference between said desired pedal torque signal and said desired idle torque and said torque loss signals to provide a desired brake torque signal.
Dependencies are inferred from the claim text.