BRAKE CONTROL APPARATUS AND CONTROL METHOD FOR THE BRAKE CONTROL APPARATUS
First Claim
1. A brake control apparatus that controls braking forces which are applied to wheels based on a pressure of hydraulic fluid, comprising:
- a manual hydraulic pressure source that pressurizes hydraulic fluid based on an amount by which a brake operation member is operated by a driver;
a first hydraulic circuit which connects a first wheel cylinder that applies a braking force to a first wheel to the manual hydraulic pressure source, and in which a passage is formed so that a pressure of the hydraulic fluid in the manual hydraulic pressure source is transferred to the first wheel cylinder;
a second hydraulic circuit which connects a second wheel cylinder that applies a braking force to a second wheel, which differs from the first wheel, to the manual hydraulic pressure source, and in which a passage is formed so that the pressure of the hydraulic fluid in the manual hydraulic pressure source is transferred to the second wheel cylinder;
a partition valve that is provided in a main passage which provides communication between the first hydraulic circuit and the second hydraulic circuit;
a first pressure sensor that detects pressure in the main passage at a position on the first hydraulic circuit side with respect to the partition valve; and
a suppression device that suppresses an increase in pressure in the passage in the first hydraulic circuit, to which the first pressure sensor is connected, in a mode, in which a hydraulic pressure is generated directly in the wheel cylinders in response to a brake pedal operation performed by the driver, when the pressure detected by the first pressure sensor is equal to or higher than a predetermined value while the partition valve is closed.
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Accused Products
Abstract
In a brake control apparatus that controls braking forces which are applied to wheels based on the pressure of the hydraulic fluid, when the pressure detected by a control pressure sensor (73) is equal to or higher than a predetermined value while a partition valve (60) is closed, a master cut valve (64) is closed to suppress an increase in the pressure in a first passage (45) in a first hydraulic circuit (37), to which the control pressure sensor (73) is connected. Alternatively, the control pressure sensor (73) is protected against overpressure by opening the outlet valve (56,57) or the pressure-decreasing valve (67).
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Citations
20 Claims
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1. A brake control apparatus that controls braking forces which are applied to wheels based on a pressure of hydraulic fluid, comprising:
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a manual hydraulic pressure source that pressurizes hydraulic fluid based on an amount by which a brake operation member is operated by a driver; a first hydraulic circuit which connects a first wheel cylinder that applies a braking force to a first wheel to the manual hydraulic pressure source, and in which a passage is formed so that a pressure of the hydraulic fluid in the manual hydraulic pressure source is transferred to the first wheel cylinder; a second hydraulic circuit which connects a second wheel cylinder that applies a braking force to a second wheel, which differs from the first wheel, to the manual hydraulic pressure source, and in which a passage is formed so that the pressure of the hydraulic fluid in the manual hydraulic pressure source is transferred to the second wheel cylinder; a partition valve that is provided in a main passage which provides communication between the first hydraulic circuit and the second hydraulic circuit; a first pressure sensor that detects pressure in the main passage at a position on the first hydraulic circuit side with respect to the partition valve; and a suppression device that suppresses an increase in pressure in the passage in the first hydraulic circuit, to which the first pressure sensor is connected, in a mode, in which a hydraulic pressure is generated directly in the wheel cylinders in response to a brake pedal operation performed by the driver, when the pressure detected by the first pressure sensor is equal to or higher than a predetermined value while the partition valve is closed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A control method for a brake control apparatus that controls braking forces which are applied to wheels based on a pressure of hydraulic fluid, the brake control apparatus including:
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a manual hydraulic pressure source that pressurizes hydraulic fluid based on an amount by which a brake operation member is operated by a driver; a first hydraulic circuit which connects a first wheel cylinder that applies a braking force to a first wheel to the manual hydraulic pressure source, and in which a passage is formed so that a pressure of the hydraulic fluid in the manual hydraulic pressure source is transferred to the first wheel cylinder; a second hydraulic circuit which connects a second wheel cylinder that applies a braking force to a second wheel, which differs from the first wheel, to the manual hydraulic pressure source, and in which a passage is formed so that the pressure of the hydraulic fluid in the manual hydraulic pressure source is transferred to the second wheel cylinder; a partition valve that is provided in a main passage which provides communication between the first hydraulic circuit and the second hydraulic circuit; and a first pressure sensor that detects a pressure in the main passage at a position on the first hydraulic circuit side with respect to the partition valve, the control method comprising; suppressing an increase in a pressure in the passage in the first hydraulic circuit, to which the first pressure sensor is connected, when the pressure detected by the first pressure sensor is equal to or higher than a predetermined value while the partition valve is closed. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification