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Regenerative brake apparatus of hybrid vehicle and method thereof

  • US 9,371,061 B2
  • Filed: 11/23/2014
  • Issued: 06/21/2016
  • Est. Priority Date: 08/27/2014
  • Status: Active Grant
First Claim
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1. A regenerative braking apparatus of a vehicle, comprising:

  • an engine that supplies power to front wheels of the vehicle;

    a hybrid starting generator (HSG) that starts the engine and generates electrical energy by operating as a power generator with the engine in operation;

    an engine clutch that is disposed between the engine and a transmission and selectively transmits the power from the engine to the front wheels;

    a motor that supplies power to rear wheels of the vehicle and generates electrical energy by operating as a power generator during braking of the vehicle;

    a battery that stores the electrical energy generated by the HSG and the motor; and

    a controller that causes a friction braking torque to be generated at the front wheels when a necessary braking torque at the front wheels is larger than a regenerative braking torque at the front wheels, and that causes a friction braking torque to be generated at the rear wheels when a necessary braking torque at the rear wheels is larger than a regenerative braking torque at the rear wheels, during braking of the vehicle, whereinthe regenerative braking torque at the front wheels is set to the smaller one of;

    a) the necessary braking torque at the front wheels and b) a regenerative braking torque available at the front wheels−

    (a friction torque*a current gear ratio of the transmission), andthe regenerative braking torque at the rear wheels is set to the smaller one of;

    a) a second regenerative braking torque available through the battery and b) a second regenerative braking torque available through the motor.

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