Vehicle dynamics control in electric drive vehicles
AssigneeWrightspeed, Inc.
InventorsIan Wright, Ryan Cash
Life of this patent
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Abstract
Embodiments of the invention are directed toward a geared traction drive system configured to drive a wheel of a vehicle, comprising: a driveshaft for transmitting power to the wheel; an electric drive motor for driving the driveshaft, the electric drive motor configured to receive signals from a vehicle dynamic control system to command a required speed; a gear reduction component for reducing the speed of the motor by a predetermined factor to a lower speed suitable for driving the wheel; and a drive electronics component that works with the electric drive motor to drive the wheel to the speed commanded by the vehicle dynamic control system.
Claims20
A vehicle dynamics control system, comprising:
- a first drive electronics module;
- a first motor, electrically coupled to the first drive electronics module and mechanically coupled to a first wheel;
- a first velocity sensor, configured to measure a rotational speed of the first wheel and output first sensor data;
- and
- a control processor, configured to receive the first sensor data and perform operations comprising:
- determining, from the first sensor data, a deceleration slip rate of the first wheel;
- determining that the deceleration slip rate is greater than a threshold slip rate;
- and
- automatically providing, based on the determining that the deceleration slip rate is greater than the threshold slip rate, instructions to the first drive electronics module to increase drive torque outputted by the first motor.
A vehicle comprising:
- a first wheel;
- and
- a vehicle dynamics control system, comprising:
- a first drive electronics module;
- a first motor, electrically coupled to the first drive electronics module and mechanically coupled to the first wheel;
- a first velocity sensor, configured to measure a rotational speed of the first wheel and output first sensor data;
- and
- a control processor, configured to receive the first sensor data and perform operations comprising:
- determining, from the first sensor data, a deceleration slip rate of the first wheel;
- determining that the deceleration slip rate is greater than a threshold slip rate;
- and
- automatically providing, based on the determining that the deceleration slip rate is greater than the threshold slip rate, instructions to the first drive electronics module to increase drive torque outputted by the first motor.
Dependencies are inferred from the claim text.