Braking force controller for electric vehicle
First Claim
1. A braking force controller for an electric vehicle having a motor for driving wheels and a motor controller for controlling power to be supplied to the motor as well as a regenerative braking force generated by the motor, comprising:
- first detection means for detecting a sudden braking operation;
second detection means for detecting a regenerative energy produced by the motor; and
central control means for providing the motor controller with a signal based on said detected regenerative energy to control the regenerative braking force generated by the motor so that a near maximum road surface frictional coefficient is achieved only by maintaining the detected regenerative energy at around a maximum value during the sudden braking operation detected by the first detection means.
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Accused Products
Abstract
A braking force controller for an electric vehicle properly carries out an anti-lock braking operation by keeping a slip ratio in a stable range. The vehicle has a motor 1 to drive wheels. A central controller 4 calculates regenerative energy according to output signals from an ammeter 51 and a voltmeter 52. If a brake sensor 62 detects a sudden braking operation, the central controller 4 controls the regenerative braking force of the motor 1 through a motor controller 2, to maintain the regenerative energy around a maximal value.
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Citations
8 Claims
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1. A braking force controller for an electric vehicle having a motor for driving wheels and a motor controller for controlling power to be supplied to the motor as well as a regenerative braking force generated by the motor, comprising:
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first detection means for detecting a sudden braking operation; second detection means for detecting a regenerative energy produced by the motor; and central control means for providing the motor controller with a signal based on said detected regenerative energy to control the regenerative braking force generated by the motor so that a near maximum road surface frictional coefficient is achieved only by maintaining the detected regenerative energy at around a maximum value during the sudden braking operation detected by the first detection means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A braking force controller for an electric vehicle, comprising:
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a detector adapted and constructed to detect a regenerative energy produced by a motor of said electric vehicle for driving wheels of said vehicle; and a control, based on said detected regenerative energy, adapted and constructed to obtain a near maximum road-surface frictional coefficient of said wheels only by maintaining said detected regenerative energy to be around a maximum value.
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Specification