Antiskd brake control system for automotive vehicles
First Claim
1. An antiskid brake system for a vehicle comprising:
- a wheel speed determining circuit determining a speed of a wheel of the vehicle;
a parameter determining circuit determining a parameter reflecting on brake torque applied to the wheel of the vehicle;
a braking condition determining circuit comparing a phase of a change in speed of the wheel determined by said wheel speed determining circuit with a phase of a change in parameter determined by said parameter determining circuit to determine a phase delay of the change in speed of the wheel and determining a braking condition based on the phase delay; and
an antiskid brake controlling circuit performing antiskid brake control based on the braking condition determined by said braking condition determining circuit.
1 Assignment
0 Petitions
Accused Products
Abstract
An antiskid brake system for an automotive vehicle is provided which includes a parameter determining circuit and a braking condition determining circuit. The parameter determining circuit determines a parameter reflecting on brake torque applied to a wheel of the vehicle. The braking condition determining circuit compares the phase of a change in speed of the wheel with the phase of a change in the parameter to determine a phase delay of the change in speed of the wheel and determines the braking condition based on the phase delay, thereby allowing a wheel skid used in the antiskid brake control precisely without employing parameters such as vehicle speed and wheel speed as employed in conventional antiskid brake systems.
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Citations
10 Claims
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1. An antiskid brake system for a vehicle comprising:
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a wheel speed determining circuit determining a speed of a wheel of the vehicle;
a parameter determining circuit determining a parameter reflecting on brake torque applied to the wheel of the vehicle;
a braking condition determining circuit comparing a phase of a change in speed of the wheel determined by said wheel speed determining circuit with a phase of a change in parameter determined by said parameter determining circuit to determine a phase delay of the change in speed of the wheel and determining a braking condition based on the phase delay; and
an antiskid brake controlling circuit performing antiskid brake control based on the braking condition determined by said braking condition determining circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A braking condition determining device for a vehicle comprising:
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a wheel speed determining circuit determining a speed of a wheel of the vehicle;
a parameter determining circuit determining a parameter reflecting on brake torque applied to the wheel of the vehicle; and
a braking condition determining circuit comparing a phase of a change in speed of the wheel determined by said wheel speed determining circuit with a phase of a change in parameter determined by said parameter determining circuit to determine a phase delay of the change in speed of the wheel and determining a braking condition of the wheel based on the phase delay.
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Specification