Hydraulic anti-locking systems for vehicles

Details Hydraulic anti-locking systems for vehicles Hydraulic anti-locking systems for vehicles

1994-09-26

1995-08-29

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

3031161, 3031191, 303900, B60T 842, B60T 850

Patent

active

054454476

ABSTRACT:
In an hydraulic anti-lock braking system a flow control valve operates with a single-acting solenoid-operated valve (35), and the flow control valve incorporates a spool (17) working in a bore (8) in a housing (7) with the flow directed thorough a passage (20) passing substantially through the centre of the spool (17). A fixed orifice (21) is located at the one end of the spool which defines a chamber (19) for a control spring (18), and a variable orifice is defined between a port (33) in the housing (7) and a metering edge on the input side of an annular groove (24) in the spool (17) and which communicates with the passage (20) in the spool (17).

REFERENCES:
patent: 3856047 (1974-12-01), Takayama
patent: 4350396 (1982-09-01), Mortimer
patent: 4715666 (1987-12-01), Farr
patent: 4775193 (1988-10-01), Farr et al.
patent: 4915459 (1990-04-01), Hashida et al.
patent: 5002344 (1991-03-01), Hashida
patent: 5026123 (1991-06-01), Nokubo et al.
patent: 5094512 (1992-03-01), Kohno et al.

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