Methods and systems for transitioning between braking modes
First Claim
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1. A method for vehicle braking, comprising:
- providing regenerative driveline braking torque to a vehicle without applying friction braking torque to the vehicle;
converting regenerative braking into electrical energy; and
reducing regenerative driveline braking torque while increasing friction braking torque to the vehicle in response to an energy storage device state of charge, the friction braking torque increased by a same amount the regenerative driveline braking torque is reduced.
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Abstract
Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a method for transitioning between driveline braking and wheel brakes is provided.
59 Citations
20 Claims
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1. A method for vehicle braking, comprising:
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providing regenerative driveline braking torque to a vehicle without applying friction braking torque to the vehicle; converting regenerative braking into electrical energy; and reducing regenerative driveline braking torque while increasing friction braking torque to the vehicle in response to an energy storage device state of charge, the friction braking torque increased by a same amount the regenerative driveline braking torque is reduced. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for vehicle braking, comprising:
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automatically stopping an engine of a vehicle based on operating conditions; providing driveline braking torque to the vehicle without applying friction braking torque to the vehicle; estimating vehicle wheel torque; and reducing driveline braking torque while increasing friction braking torque to the vehicle in response to the estimated vehicle wheel torque and an energy storage device state of charge. - View Dependent Claims (12, 13)
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14. A vehicle system, comprising:
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an engine; a dual mass flywheel including a first side mechanically coupled to the engine; a driveline disconnect clutch mechanically including a first side coupled to a second side of the dual mass flywheel; a driveline integrated starter/generator (DISG) including a first side coupled to a second side of the driveline disconnect clutch; a transmission selectively coupled to the engine via the driveline disconnect clutch; friction brakes; and a controller including non-transitory instructions executable to automatically stop engine rotation, provide a driveline braking torque via the DISG, apply the friction brakes while reducing the driveline braking torque, and upshift the transmission to a gear in response to a road grade. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification