Electric automobile
AssigneeNtn Corporation
InventorTomoaki Makino
Life of this patent
Estimating the term…
Abstract
An electric vehicle is provided in which left and right drive wheels are driven by respective motors, and which enables slip control in a simple structure while preventing a driver who used to drive an engine vehicle with a differential from feeling uncomfortable. The vehicle includes a controller having a computer controlling the two motors including a basic control unit, a slip determiner, and a dual-wheel-drive-reduction unit. The control unit determines driving forces of the motors such that the forces are equal to each other, depending on a depression of an accelerator pedal. The determiner detects slippage between each of the wheels, and a road surface. The dual-wheel-drive-reduction unit reduces, when the determiner determines that greater slippage has occurred at at least one of the wheels, drive currents of the motors.
Claims6
An electric vehicle comprising:
- two electric motors configured to drive left and right drive wheels, respectively;
- and
- a controller having a computer configured to control the two motors, the controller including
- a basic control unit configured to determine driving forces to be generated by the two motors such that the driving forces are equal to each other, the driving forces depending on a depression of an accelerator pedal operated by a driver,
- a slip determination unit configured to determine whether or not slippage with the degree not less than a predetermined value occurs between each of the left and the right drive wheels, and a road surface, and
- a dual-wheel drive reduction unit configured to reduce, when the slip determination unit determines that the slippage with the degree not less than the predetermined value has occurred between at least one of the left and the right drive wheels, and the road surface, drive currents of both the two motors to a same first predetermined current value, or by a same first predetermined proportion.
Dependencies are inferred from the claim text.