TRAVELING MODE SWITCHING CONTROLLER OF HYBRID ELECTRIC VEHICLE

摘要

A traveling mode switching controller of a hybrid electric vehicle has a velocity detection unit, a state-of-charge detection unit, and a switching control unit for selectively switching among first to third traveling modes. In the first traveling mode, an engine is deactivated and a drive motor is activated to actuate drive wheels. In the second traveling mode, the engine activates a generator to activate the drive motor. In the third traveling mode, the engine activates the drive wheels. When the state of charge is less than a first state of charge, the switching control unit performs switching between the second traveling mode and the third traveling mode at a first velocity. When the state of charge is the first state of charge or more, the switching control unit performs switching between the first traveling mode and the third traveling mode at a predetermined velocity higher than the first velocity.

主权项

1. A traveling mode switching controller of a hybrid electric vehicle, comprising:
a velocity detection unit for detecting a traveling velocity of a vehicle; a state-of-charge detection unit for detecting a state of charge of a drive battery; and
a switching control unit that, on the basis of the traveling velocity of the vehicle and the state of charge of the drive battery, selectively switches amonga first traveling mode in which a clutch, which connects and disconnects driving force transmitted from the engine to the drive wheels, is released and the engine is deactivated and in which the drive wheels are actuated by activating a drive motor by use of the electric power supplied from the drive battery,a second traveling mode in which the clutch is released, in which the generator is actuated by the engine to generate electric power, and in which the drive motor is activated by the electric power to actuate the drive wheels, anda third traveling mode in which the clutch is connected and in which the drive wheels are actuated by the engine, wherein the switching control unit performs
switching between the second traveling mode and the third traveling mode at a first velocity when the state of charge is less than a first state of charge, andswitching between the first traveling mode and the third traveling mode at a predetermined velocity which is higher than the first velocity when the state of charge is the first state of charge or more.