Throttle control systems and methods for cylinder activation and deactivation
AssigneeGM Global Technology Operations LLC
InventorsSanjeev M. Naik, Kevin Andrew Gady
Life of this patent
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Abstract
An engine control system for a vehicle includes a target torque module that determines a target torque output of an engine based on at least one driver input. A target air per cylinder (APC) module determines a target APC for the engine based on the target torque. A target mass airflow (MAF) module determines a target MAF through a throttle valve of the engine based on the target APC, a number of activated cylinders of the engine, and a total number of cylinders of the engine. A throttle control module determines a target throttle opening based on the target MAF and controls opening of the throttle valve based on the target throttle opening.
Claims10
An engine control system for a vehicle, comprising:
- a target torque circuit that determines a target torque output of an engine based on at least one driver input;
- a target air per cylinder (APC) circuit that determines a target APC for the engine based on the target torque;
- a first target mass airflow (MAF) circuit that determines a first target MAF through a throttle valve of the engine based on a first set of parameters including the target APC, an APC of the engine, a temperature of air within an intake manifold of the engine, a volumetric efficiency of the engine, a predetermined response time value, a number of activated cylinders of the engine, and a total number of cylinders of the engine;
- a second target MAF circuit that determines a second target MAF through the throttle valve based on a second set of parameters including the target APC, an engine speed, and the total number of cylinders of the engine,
- wherein at least one parameter of the first set of parameters is not included in the second set of parameters, and
- wherein at least one parameter of the second set of parameters is not included in the first set of parameters;
- a selection circuit that:
- selects the first target MAF as a selected target MAF while at least one cylinder of the engine is transitioned (a) from activated to deactivated or (b) from deactivated to activated;
- and
- selects the second target MAF as the selected target MAF when both (a) zero cylinders of the engine are being transitioned from activated to deactivated and (b) zero cylinders of the engine are being transitioned from deactivated to activated;
- and
- a throttle control circuit that determines a target throttle opening based on the selected target MAF and that controls opening of the throttle valve based on the target throttle opening.
An engine control method comprising:
- determining a target torque output of an engine based on at least one driver input;
- determining a target air per cylinder (APC) for the engine based on the target torque;
- determining a first target mass airflow (MAF) through a throttle valve of the engine based on a first set of parameters including the target APC, an APC of the engine, a temperature of air within an intake manifold of the engine, a volumetric efficiency of the engine, a predetermined response time value, a number of activated cylinders of the engine, and a total number of cylinders of the engine;
- determining a second target MAF through the throttle valve based on a second set of parameters including the target APC, an engine speed, and the total number of cylinders of the engine,
- wherein at least one parameter of the first set of parameters is not included in the second set of parameters, and
- wherein at least one parameter of the second set of parameters is not included in the first set of parameters;
- selecting the first target MAF as a selected target MAF while at least one cylinder of the engine is transitioned (a) from activated to deactivated or (b) from deactivated to activated;
- selecting the second target MAF as the selected target MAF when both (a) zero cylinders of the engine are being transitioned from activated to deactivated and (b) zero cylinders of the engine are being transitioned from deactivated to activated;
- determining a target throttle opening based on the selected target MAF;
- and
- controlling opening of the throttle valve based on the target throttle opening.
Dependencies are inferred from the claim text.