Impulse charging control to extend displacement on demand range
First Claim
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1. An engine control system for controlling engine operation in activated and deactivated modes in a displacement on demand (DOD) engine, comprising:
- an impulse charging device that is disposed upstream of an intake port of a cylinder of said DOD engine and that is operable to regulate air flow into said cylinder, wherein said impulse charging device inhibits air flow into said cylinder for a portion of an intake event; and
a first module that initiates impulse charging to regulate air flow into said cylinder when a desired engine torque output exceeds a first threshold engine torque output during engine operation in said deactivated mode.
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Abstract
An engine control system for controlling engine operation in activated and deactivated modes in a displacement on demand (DOD) engine includes an impulse charging device that is disposed upstream of an intake port of a cylinder of the DOD engine and that is operable to regulate air flow into the cylinder. A first module initiates impulse charging to regulate air flow into the cylinder when a desired engine torque output nears a first threshold engine torque output during engine operation in the deactivated mode.
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Citations
15 Claims
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1. An engine control system for controlling engine operation in activated and deactivated modes in a displacement on demand (DOD) engine, comprising:
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an impulse charging device that is disposed upstream of an intake port of a cylinder of said DOD engine and that is operable to regulate air flow into said cylinder, wherein said impulse charging device inhibits air flow into said cylinder for a portion of an intake event; and a first module that initiates impulse charging to regulate air flow into said cylinder when a desired engine torque output exceeds a first threshold engine torque output during engine operation in said deactivated mode. - View Dependent Claims (2, 3, 4, 5)
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6. A method of controlling engine operation in activated and deactivated modes in a displacement on demand (DOD) engine, comprising:
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determining a desired engine torque; comparing said desired engine torque to a first threshold engine torque; and initiating impulse charging of air into cylinders of said DOD engine when said desired engine torque exceeds said first threshold engine torque while operating in said deactivated mode, wherein said impulse charging includes inhibiting air flow into said cylinder for a portion of an intake event. - View Dependent Claims (7, 8, 9, 10)
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11. A method of controlling engine operation in activated and deactivated modes in a displacement on demand (DOD) engine, comprising:
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determining a desired engine torque; calculating a first threshold engine torque based on a first available engine torque in said deactivated mode; comparing said desired engine torque to said first threshold engine torque; and initiating impulse charging of air into cylinders of said DOD engine when said desired engine torque exceeds said first threshold engine torque while operating in said deactivated mode, wherein said impulse charging includes inhibiting air flow into said cylinder for a portion of an intake event. - View Dependent Claims (12, 13, 14, 15)
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Specification