Power Development for Rapid Start in Full-Hybrid Drives with Optimized Traction Control
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsChristoph KOZUB, Herman Jonsson
Life of this patent
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Abstract
A launch control system for a hybrid vehicle is described. The system includes overcharging an electrical energy storage unit of the hybrid vehicle, operating an internal combustion engine at an increased power level, and operating an electric motor at an increased power level with the overcharged electrical energy storage unit. The transmission during the launch is configured to connect the electric motor and the internal combustion engine to a drivetrain of the hybrid vehicle, and to selectively slip friction clutches to store energy and release it for the launch.
Claims19
A launch control system for a hybrid vehicle, comprising:
- an internal combustion engine providing propulsion for the vehicle and driving elements for recharging an electrical energy storage unit;
- an electric motor for providing propulsion to the vehicle;
- a transmission comprising controlled slip clutches for selectively connecting the internal combustion engine and the electric motor to a drivetrain of the vehicle;
- and
- a control unit which, upon receiving a launch signal, commands overcharging of the electrical energy storage units, a raised power configuration of the internal combustion engine, a discharge of the overcharged electrical energy storage unit to obtain a raised power of the electric motor, and controlled clutch slip.
A launch control method for a hybrid vehicle, comprising the acts of:
- overcharging an electrical energy storage unit of the hybrid vehicle;
- operating an internal combustion engine of the hybrid vehicle at a raised power level during the launch;
- operating an electric motor at a raised power level during the launch, with power from the overcharged electrical energy storage unit;
- and
- configuring a transmission to connect during the launch the electric motor and the internal combustion engine to a drivetrain of the hybrid vehicle, and to selectively slip friction clutches of the transmission to store energy releasable during the launch.
Dependencies are inferred from the claim text.