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US 9,243,524 B2Granted
Engine control systems and methods for transmission upshifts
AssigneeGM Global Technology Operations LLC
InventorsChristopher E. Whitney, Ning Jin, Kevin C. Wong, Robert J. Genslak
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Abstract
For an upshift of a transmission, a model predictive control (MPC) module sets target intake and exhaust valve timings for changes in a torque request that occur during the upshift. A phaser actuator module controls intake valve phasing of an engine based on the target intake valve timing and controls exhaust valve phasing based on the target exhaust valve timing.
Claims22
An engine control system for a vehicle, comprising:
- a reference module that sets at least one of a reference intake valve timing and a reference exhaust valve timing for an upshift of a transmission;
- a model predictive control (MPC) module that:
- identifies sets of possible target values based on an engine torque request, each of the possible sets including a possible target intake valve timing and a possible target exhaust valve timing;
- selects one of the sets of possible target values based on (i) comparisons of the possible target intake valve timings of the sets with the reference intake valve timing and (ii) comparisons of the possible target exhaust valve timings of the sets with the reference exhaust valve timing;
- sets a target intake valve timing based on the possible target intake valve timing of the selected one of the sets;
- and
- sets a target exhaust valve timing based on the possible target exhaust valve timing of the selected one of the sets;
- and
- a phaser actuator module that controls intake valve phasing of an engine based on the target intake valve timing and that controls exhaust valve phasing of the engine based on the target exhaust valve timing.
6 more elements
An engine control system of a vehicle, comprising:
- a prediction module that, based on a set of possible target values for M future times and a model of an engine, determines predicted torques of the engine for the M future times, respectively,
- wherein M is an integer greater than one;
- a cost module that determines a cost for the set of possible target values based on comparisons of the predicted torques for the M future times with engine torque requests for the M future times, respectively;
- a future request module that sets at least one of the engine torque requests for the M future times based on an expected change in the engine torque requests for an upshift of a transmission,
- wherein the set of possible target values includes possible target values for adjusting at least one of intake and exhaust valve phasing before the expected change;
- a selection module that, based on the cost, selects the set of possible target values from a group including the set of possible target values and N other sets of possible target values, wherein N is an integer greater than zero, and that sets target values based on the selected set of possible target values;
- and
- a phaser actuator module that controls intake and exhaust valve phasing based on first and second ones of the target values, respectively.
5 more elements
An engine control method for a vehicle, comprising:
- setting at least one of a reference intake valve timing and a reference exhaust valve timing for an upshift of a transmission;
- using a model predictive control (MPC) module:
- identifying sets of possible target values based on an engine torque request, each of the possible sets including a possible target intake valve timing and a possible target exhaust valve timing;
- selecting one of the sets of possible target values based on (i) comparisons of the possible target intake valve timings of the sets with the reference intake valve timing and (ii) comparisons of the possible target exhaust valve timings of the sets with the reference exhaust valve timing;
- setting a target intake valve timing based on the possible target intake valve timing of the selected one of the sets;
- and
- setting a target exhaust valve timing based on the possible target exhaust valve timing of the selected one of the sets;
- and
- controlling intake valve phasing of an engine based on the target intake valve timing and that controls exhaust valve phasing of the engine based on the target exhaust valve timing.
6 more elements
Dependencies are inferred from the claim text.