Antiskid brake control system
First Claim
1. An antiskid brake control system, comprising:
- a sensor which senses a wheel speed;
a braking device comprising a valve which allows increase and reduction in a fluid pressure in a wheel cylinder; and
an electronic control unit (ECU) connected to the sensor and the braking device, the ECU estimating a wheel slip in accordance with the sensed wheel speed and controlling the valve for braking operation in accordance with the estimated wheel slip for an antiskid brake control, the fluid pressure being reduced when the wheel slip is enlarged and being increased when the wheel slip is lowered, the ECU performing a quick pressure reduction prohibiting control to restrain a quick pressure reduction having a greater reduction amount than a predetermined reduction amount when a vehicle-body speed is smaller than a predetermined quick pressure reduction prohibiting speed.
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Accused Products
Abstract
In an antiskid brake control system, an ECU estimates a wheel slip in accordance with a sensed wheel speed and controls a fluid pressure control valve for braking operation in accordance with the estimated wheel slip for an antiskid brake control, the fluid pressure being reduced when the wheel slip is enlarged and being increased when the wheel slip is lowered. When a vehicle-body speed is smaller than a predetermined quick pressure reduction prohibiting speed, the ECU performs a quick pressure reduction prohibiting control to restrain a quick pressure reduction having a greater reduction amount than a predetermined reduction amount.
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Citations
14 Claims
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1. An antiskid brake control system, comprising:
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a sensor which senses a wheel speed;
a braking device comprising a valve which allows increase and reduction in a fluid pressure in a wheel cylinder; and
an electronic control unit (ECU) connected to the sensor and the braking device, the ECU estimating a wheel slip in accordance with the sensed wheel speed and controlling the valve for braking operation in accordance with the estimated wheel slip for an antiskid brake control, the fluid pressure being reduced when the wheel slip is enlarged and being increased when the wheel slip is lowered, the ECU performing a quick pressure reduction prohibiting control to restrain a quick pressure reduction having a greater reduction amount than a predetermined reduction amount when a vehicle-body speed is smaller than a predetermined quick pressure reduction prohibiting speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An antiskid brake control system, comprising:
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a sensor which senses a wheel speed;
a braking device comprising a valve which allows increase and reduction in a fluid pressure in a wheel cylinder;
means for estimating a wheel slip in accordance with the sensed wheel speed;
means for controlling the valve for braking operation in accordance with the estimated wheel slip for an antiskid brake control, the fluid pressure being reduced when the wheel slip is enlarged and being increased when the wheel slip is lowered; and
means for performing a quick pressure reduction prohibiting control to restrain a quick pressure reduction having a greater reduction amount than a predetermined reduction amount when a vehicle-body speed is smaller than a predetermined quick pressure reduction prohibiting speed.
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Specification