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US 9,809,129 B2Granted
Four motor direct driving system
AssigneeThunder Power New Energy Vehicle Development Company Limited
InventorSheng-Fu Lai
Life of this patent
Estimating the term…
Abstract
A driving system for electric vehicles. The driving system may have two or more electric motors, each with voltage inputs, which are connected to the axles and tires of the vehicle. A variable input control may provide a signal that indicates its current operation position to a vehicle control unit. The vehicle control unit takes the information from the variable input control and determines how much power to send to each of the electric motors' voltage inputs.
Claims16
A vehicle driving system comprising:
- a steering wheel with a corresponding steering angle;
- four electric motors, wherein each of the four electric motors has a voltage input;
- a variable input control configured to provide a signal indicating an operational position of the variable input control, wherein the operational position of the variable input control is related to the steering angle;
- four wheels, each of the four wheels connected to one of the four electric motors by an axle;
- and
- a vehicle control unit configured to control the voltage inputs of the four electric motors, wherein the vehicle control unit is further configured to:
- receive information indicating the operational position of the variable input control;
- determine the voltage inputs for the four electric motors based on the received information such that, when the electric vehicle is turning:
- a first voltage input is determined for a first electric motor coupled with a front inside turning wheel;
- a second voltage input is determined for a second electric motor coupled with a front outside turning wheel;
- a third voltage input is determined for a third electric motor coupled with a rear inside turning wheel;
- a fourth voltage input is determined for a fourth electric motor coupled with a rear outside turning wheel;
- wherein each of the first voltage input, the second voltage input, the third voltage input, and the fourth voltage input are different from each other;
- and
- wherein the first voltage input is less than the second voltage input, the third voltage input is less than the fourth voltage input, the third voltage input is less than the first voltage input, and the fourth voltage input is less than the second voltage input;
- and
- generate instructions to effectuate the voltage inputs to the four electric motors.
14 more elements
A vehicle driving system for an electric vehicle, the vehicle driving system comprising:
- an accelerator pedal;
- a brake pedal;
- a steering wheel;
- four electric motors, wherein each of the four electric motors has a voltage input;
- a variable input control configured to provide a signal indicating an operational position of the variable input control, wherein the operational position of the variable input control is related to the accelerator pedal position, the brake pedal position, and the steering angle;
- four wheels, wherein each of the four wheels are connected to one of the four electric motors by an axle;
- a vehicle control unit configured to control the voltage inputs of the four electric motors, wherein the vehicle control unit is further configured to:
- receive information indicating the operational position of the variable input control;
- determine the voltage inputs for the four electric motors based on the received information such that, when the electric vehicle is turning:
- a first voltage input is determined for a first electric motor coupled with a front inside turning wheel;
- a second voltage input is determined for a second electric motor coupled with a front outside turning wheel;
- a third voltage input is determined for a third electric motor coupled with a rear inside turning wheel;
- a fourth voltage input is determined for a fourth electric motor coupled with a rear outside turning wheel;
- wherein each of the first voltage input, the second voltage input, the third voltage input, and the fourth voltage input are different from each other;
- and
- wherein the first voltage input is less than the second voltage input, the third voltage input is less than the fourth voltage input, the third voltage intput is less than the first voltage intput, and the fourth voltage input is less than the second voltage input;
- and
- generate instructions to effectuate the voltage inputs to the four electric motors;
- four electric power inverting devices that invert voltage, wherein each of the four electric power inverting devices are configured to receive an input from the vehicle control unit and output a voltage to one of the four electric motors;
- four encoders, wherein each of the four encoders are configured to record a mechanical output from one of the four electric motors;
- wherein the vehicle control unit is configured to control the voltage inputs of the four electric motors based on signals received from the accelerator pedal, the brake pedal, the steering wheel, and the four encoders;
- wherein the mechanical output recorded by the four encoders from the four electric motors is the rotational speed of each motor;
- and
- wherein each of the four electric motors are separate and distinct from each of the four wheels.
21 more elements
A method for driving an electric vehicle, the method comprising:
- receiving a signal at a vehicle control unit from a variable input control, wherein the signal from the variable input control corresponds to an operational position of the variable input control, and wherein the operational position of the variable input control is related to a steering angle corresponding to a steering wheel;
- determining four voltage outputs at the vehicle control unit based on the information received from the variable input control such that, when the electric vehicle is turning:
- a first voltage output is determined for coupling with a first electric motor connected to a front inside turning wheel;
- a second voltage output is determined for coupling with a second electric motor connected to a front outside turning wheel;
- a third voltage output is determined for coupling with a third electric motor connected to a rear inside turning wheel;
- a fourth voltage output is determined for coupling with a fourth electric motor connected to a rear outside turning wheel;
- wherein each of the first voltage output, the second voltage output, the third voltage output, and the fourth voltage output are different from each other;
- and
- wherein the first voltage output is less than the second voltage output, the third voltage output is less than the fourth voltage output, the third voltage output is less than the first voltage output, and the fourth voltage output is less than the second voltage output;
- and
- outputting the first voltage output, the second voltage output, the third voltage output, and the fourth voltage output at the vehicle control unit.
8 more elements
Dependencies are inferred from the claim text.