Control device for electric vehicle stopping at slope road
First Claim
1. A control device for an electric vehicle stopping at a slope road comprising:
- an electric motor for driving a wheel;
a drive torque control means for controlling a drive torque of the electric motor in accordance with a driving condition of the vehicle and outputting the drive torque to the electric motor;
a hydraulic brake force adjusting means for adjusting a hydraulic brake force for applying a hydraulic pressure to a wheel cylinder of the wheel independent from a brake pedal operation;
a judging means for a stopping state at a slope road which judges whether the vehicle is under a stopping state at a slope road when the drive torque is equal to or greater than the predetermined value;
wherein when the judging means for the stopping state at the slope road judges that the vehicle is under the stopping state at the slope road, the hydraulic brake force adjusting means applies a predetermined hydraulic pressure to the wheel cylinder of the wheel and the drive torque control means decreases a drive torque outputted to the electric motor to be lower than a drive torque controlled in accordance with a driving condition of the vehicle.
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Accused Products
Abstract
A control device for an electric vehicle stopping at a slope road which reduces a power consumption of the electric motor when the vehicle is stopping at the slope road with the generation of a drive torque. The device judges the stopping state of the vehicle at the slope road when a condition that a throttle opening degree is not zero, that the drive torque is not zero, and that a vehicle speed is zero continues for a predetermined time, applies a hydraulic pressure P relative to wheel cylinder, and decreases the drive torque outputting to the motor to be zero. The device judges a release of the stopping state at the slope road when a condition that a throttle opening degree becomes greater than a throttle opening degree under the vehicle stopping state at the slope road, recovers the drive torque, and gradually releases an application of the hydraulic pressure to the wheel cylinder.
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Citations
20 Claims
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1. A control device for an electric vehicle stopping at a slope road comprising:
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an electric motor for driving a wheel;
a drive torque control means for controlling a drive torque of the electric motor in accordance with a driving condition of the vehicle and outputting the drive torque to the electric motor;
a hydraulic brake force adjusting means for adjusting a hydraulic brake force for applying a hydraulic pressure to a wheel cylinder of the wheel independent from a brake pedal operation;
a judging means for a stopping state at a slope road which judges whether the vehicle is under a stopping state at a slope road when the drive torque is equal to or greater than the predetermined value;
wherein when the judging means for the stopping state at the slope road judges that the vehicle is under the stopping state at the slope road, the hydraulic brake force adjusting means applies a predetermined hydraulic pressure to the wheel cylinder of the wheel and the drive torque control means decreases a drive torque outputted to the electric motor to be lower than a drive torque controlled in accordance with a driving condition of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification