Running controller and electric running control system for electric vehicle
First Claim
1. A running controller for an electric vehicle in which a wheel is driven and braked through control of an electric driving apparatus including a motor, wherein said running controller includes control means for executing powering and regenerative control of said motor to change, depending on road conditions, a target value to which a slip rate is to be converged, when slipping of the wheel is detected.
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Accused Products
Abstract
A running controller and an electric running control system for an electric vehicle, in which when a tire slip occurs during running of the vehicle, such as under driving, braking and turning, a motor output is controlled to always maximize the coefficient μ of road friction, thereby obtaining a maximum tire driving force and a maximum tire braking force. In the electric vehicle, wheels are driven and braked through control of electric driving apparatuss each including a motor. When slipping of any of the wheels is detected, ESC-CU executes powering and regenerative control of the motor to change, depending on road conditions, a target value to which a slip rate is to be converged. The ESC-CU calculates the coefficient μ of road friction based on a motor current and executes the powering and regenerative control of the motor such that the calculated coefficient μ of road friction is maintained in the vicinity of a maximum value thereof.
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Citations
10 Claims
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1. A running controller for an electric vehicle in which a wheel is driven and braked through control of an electric driving apparatus including a motor,
wherein said running controller includes control means for executing powering and regenerative control of said motor to change, depending on road conditions, a target value to which a slip rate is to be converged, when slipping of the wheel is detected.
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10. An electric running control system for an electric vehicle in which a wheel is driven and braked through control of an electric driving apparatus including a motor, said electric running control system comprising:
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said electric driving apparatus;
motor control means for controlling electric power supplied to said electric driving apparatus; and
a running controller for controlling said motor control means, said running controller including control means for executing powering and regenerative control of said motor to change, depending on road conditions, a target value to which a slip rate is to be converged, when slipping of the wheel is detected.
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Specification