EP0181156A2
Expired / Lapsed
EP
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Antiskid control device
Assignee: Denso Corp
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Filing: 1985-10-31
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Granted: —
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Expires: 2005-10-31
Abstract
Abstract An antiskid control device including a main line system, a first oil hydraulic source generating a pressurized oil and supplying the oil to wheel cylinders through the main line system, a subline system, and a second oil hydraulic source generating a pressurized oil and supplying the oil to the wheel cylinders through the subline system. The main line system and the first oil hydraulic source are provided for a usual braking operation. The subline system and the second oil hydraulic source are provided for an antiskid control. The main line system has a cut-off valve which opens the main line system in the usual braking operation and closes the main line system in the antiskid control. The subline system has a switching valve which opens and closes the subline system according to a Ibcking condition of the wheel during the antiskid control. The second oil hydraulic source generates a pressurized oil when a locking condition is sensed.
Inventors
- 👤 Kazuma Matsui
- 👤 Yoshiyuki Hattori
- 👤 Yuichi Imani
- 👤 Akira Kuno
- 👤 Yoshihisa Nomura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 17:53
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/40; B60T8/4018; B60T8/4022; B60T8/17; B60T8/176; B60T8/1761; B60T8/17616; B60T8/404; B60T8/405; B60T8/4054; B60T8/42; B60T8/4275; B60T8/44; B60T8/445
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
162 words
An antiskid control device for controlling the pressure in the wheel cylinders of a brake system of a vehicle for preventing the vehicle from skidding as a result of the wheels locking, said device comprising; a first oil hydraulic source for generating a pressurized oil for normal brake operation, a second oil hydraulic source for generating a pressurized oil for the antiskid control, a main line system having a main line connecting said first oil hydraulic source to said wheel cylinders, and a cut-off valve for opening and closing said main line, means for switching said cut-off valve to open said main line under normal conditions, and to close said main line when wheel locking occurs, a subline system having a subline connecting said second oil hydraulic source to said wheel cylinders, and a switching valve opening and closing said subline, and means for controlling said switching valve between an open and closed position depending upon the locking condition of the wheel.
Claim 2
Dependent Claim
162 words
An antiskid control device for controlling the pressure in the wheel cylinders of a brake system of a vehicle for preventing the vehicle from skidding as a result of the wheels locking, said device comprising; a first oil hydraulic source for generating a pressurized oil for normal brake operation, a second oil hydraulic source for generating a pressurized oil for the antiskid control, a main line system having a main line connecting said first oil hydraulic source to said wheel cylinders, and a cut-off valve for opening and closing said main line, means for switching said cut-off valve to open said main line under normal conditions, and to close said main line when wheel locking occurs, a subline system having a subline connecting said second oil hydraulic source to said wheel cylinders, and a switching valve opening and closing said subline, and means for controlling said switching valve between an open and closed position depending upon the locking condition of the wheel.
Claim 3
Dependent Claim
23 words
An antiskid control device according to claim 1, wherein said first oil hydraulic source is a master cylinder provided in the brake system.
Claim 4
Dependent Claim
29 words
An antiskid control device according to claim 1 or claim 2, wherein said second oil hydraulic source comprises a motor, and an oil hydraulic pump rotated by said motor.
Claim 5
Dependent Claim
20 words
An antiskid control device according to any preceding claim, wherein said second oil hydraulic source is a variable delivery pump.
Claim 6
Dependent Claim
44 words
An antiskid control device according to claim 4, wherein said variable delivery pump discharges a small flow rate quantity of oil when the discharge pressure is relatively high, and discharges a large flow rate quantity of oil when the discharge pressure is relatively low.
Claim 7
Dependent Claim
67 words
An antiskid control device according to any preceding claim, further comprising a pressure difference sensor for detecting a difference in pressure between the wheel cylinder pressure and a master cylinder pressure, and means for halting the antiskid control, said halting means opening said cut-off valve and stopping the operation of said second oil hydraulic source when the wheel cylinder pressure becomes higher than the master cylinder pressure.
Claim 8
Dependent Claim
57 words
An antiskid control device according to any preceding claim, further comprising a pressure sensor for detecting the pressure in said first oil hydraulic source, and a means for starting the operation of said second oil hydraulic source, said starting means starting said second oil hydraulic source to generate a pressurized oil according to the master cylinder pressure.
Claim 9
Dependent Claim
49 words
An antiskid control device according to claim 7, further comprising a wheel velocity sensor, said starting means starting said second oil hydraulic source to generate a pressurized oil when the master cylinder pressure is more than a predetermined value and the wheel velocity is more than a predetermined value.
Claim 10
Dependent Claim
38 words
An antiskid control device according to any preceding claim, further comprising a first means for suppressing the discharge pressure of said second oil hydraulic source when said discharge pressure becomes higher than said first oil hydraulic source pressure.
Claim 11
Dependent Claim
56 words
An antiskid control device according to claim 9, wherein said first suppressing means is a main relief valve connected to a discharge portion of said second oil hydraulic source, said main relief valve being subjected to a discharge pressure of said first oil hydraulic source to suppress a discharge pressure of said second oil hydraulic source.
Claim 12
Dependent Claim
45 words
An antiskid control device according to any preceding claim, further comprising a second means for suppressing a discharge pressure of said second oil hydraulic source when said discharge pressure becomes higher than a sum of a pressure in said wheel cylinder and a predetermined value.
Claim 13
Dependent Claim
45 words
An antiskid control device according to claim 11, wherein said second suppressing means is a subrelief valve connected to a discharge portion of said second oil hydraulic source said subrelief valve being subjected to the pressure in said wheel cylinder to suppress the discharge pressure.
Claim 14
Dependent Claim
88 words
An antiskid control device for controlling the pressure in the wheel cylinders of a brake system of a vehicle for preventing the vehicle from skidding as a result of the wheels locking, said device comprising; first and second oil hydraulic sources, a subline system having a subline connecting the second of said hydraulic sources to said wheel cylinders, and a switching valve opening and closing said subline, and means for controlling said switching valve between an open and closed position depending upon the locking conditions of the wheels.
Claim 15
Dependent Claim
88 words
An antiskid control device for controlling the pressure in the wheel cylinders of a brake system of a vehicle for preventing the vehicle from skidding as a result of the wheels locking, said device comprising; first and second oil hydraulic sources, a subline system having a subline connecting the second of said hydraulic sources to said wheel cylinders, and a switching valve opening and closing said subline, and means for controlling said switching valve between an open and closed position depending upon the locking conditions of the wheels.
References Cited (Backward Citations)
No citation records indexed.
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