System for controlling overall coasting torque in a hybrid electric vehicle
First Claim
1. A hybrid vehicle comprising:
- an engine;
an electric machine selectively coupled to the engine via a clutch;
an accelerator pedal; and
at least one controller programmed to disengage the clutch and alter a commanded torque to the electric machine in response to a tip-out of the accelerator pedal to simulate compression braking of the engine.
1 Assignment
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Accused Products
Abstract
A hybrid vehicle is provided that includes an engine, a reversible electric machine capable of generating and providing electric power, and a clutch for selectively engaging the engine to the electric machine. While the vehicle is traveling, an operator of the vehicle may release (“tip-out”) the accelerator pedal, indicating a desire for a reduction in speed and/or acceleration of the vehicle. If the clutch is engaged during the tip-out, the at least one controller is programmed to disengage the clutch and alter a commanded torque to the electric machine in response to the tip-out of the accelerator pedal to simulate compression braking of the engine. If the vehicle is operating in an electric-only mode of propulsion during the tip-out, and if a state-of-charge of the battery is relatively high, the controller is programmed to activate the engine and provide compression torque to the driveline in response to the tip-out.
32 Citations
21 Claims
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1. A hybrid vehicle comprising:
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an engine; an electric machine selectively coupled to the engine via a clutch; an accelerator pedal; and at least one controller programmed to disengage the clutch and alter a commanded torque to the electric machine in response to a tip-out of the accelerator pedal to simulate compression braking of the engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for controlling coasting torque in a hybrid vehicle, comprising:
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an engine; an electric machine selectively coupled to the engine via a clutch; a battery electrically connected to the electric machine; an accelerator pedal; and at least one controller programmed to engage the clutch during an electric-only mode of operation in response to (i) a tip-out of the accelerator pedal and (ii) a state-of-charge of the battery exceeding a charge threshold. - View Dependent Claims (11, 12, 13, 14)
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15. A system for controlling coasting torque in a hybrid vehicle, comprising:
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an engine; an electric machine having an output and selectively coupled to the engine via a clutch; an accelerator pedal; and at least one controller programmed to engage the clutch during an electric-only mode of operation in response to (i) a tip-out of the accelerator pedal and (ii) a rotational speed of the output of the electric machine being above a speed threshold. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification