Title:
【発明の名称】車両のアンチロック・ブレーキ装置
Document Type and Number:
Japanese Patent JP3066755
Kind Code:
B2
Abstract:
A vehicle braking system such as an anti-lock brake system and/or a traction control utilizes a separate solenoid-actuated, two position, three-way valve in each controlled channel of the brake system for controlling the application of pressure to the respective wheel brake circuit. The valve includes a first port connected to the controlled wheel brake(s), a second port connected to an outlet of a hydraulic pump, and a third port connected to the inlet of the hydraulic pump. The valve is only moveable between a first position wherein the outlet of the pump is connected to the wheel brake to increase pressure to the wheel brake, and a second position wherein the wheel brake is connected to the inlet of the pump to decrease pressure to the wheel brake. An electronic control is provided for operating the valve to control the application of pressure to the selected wheel brakes. The control cyclically moves the valve between the first and second positions during a predetermined time period to alternately increase and decrease pressure to the wheel brake. More specifically, the control generates a pulse-width-modulated signal to modulate the time periods during which the valve is maintained in either the first or second positions to control the effective pressure to the wheel brake to obtain a net increase, decrease, or constant pressure to the wheel brake during the predetermined time period.
Inventors:
Thomas M Atkins
Brian sea tack
Edward N Fuller
Peter every
Brian sea tack
Edward N Fuller
Peter every
Application Number:
JP32161989A
Publication Date:
July 17, 2000
Filing Date:
December 13, 1989
Export Citation:
Assignee:
Kelsey Hayes Company
International Classes:
B60T8/1761; B60T8/1763; B60T8/48; B60T8/32; B60T8/34; B60T8/36; B60T8/40; B60T8/42; B60T8/50; B60T8/94; B60T11/34; (IPC1-7): B60T8/48
Domestic Patent References:
| JP60213550A | ||||
| JP6378859A | ||||
| JP63143466U |
Other References:
【文献】米国特許4673226(US,A)
Attorney, Agent or Firm:
Takehiko Saito (1 outside)