JPH0332555U - - Google Patents

Description

[Brief explanation of drawings]

Figures 1A, 1B, 1C, and 1D are diagrams showing an embodiment of this invention. Figure 1A is a sectional view showing the flow control valve during normal brake operation, and Figure 1B is a cross-sectional view of the flow control valve during normal brake operation. FIG. 1C is a cross-sectional view showing the state after the spool has moved slightly toward the decompression chamber side, FIG. 1C is a cross-sectional view showing the state after the spool has further moved toward the decompression chamber side, and FIG. 1D is this embodiment. FIG. 2 is a block diagram of a hydraulic fluid flow system. 2A, 2B, 2C, and 2D are views showing other embodiments of this invention; FIG. 2A is a sectional view of the flow control valve during normal brake operation; The figure is a sectional view showing the state after the spool has moved slightly toward the decompression chamber, and FIG. 2C is a sectional view showing the state after the spool has further moved toward the decompression chamber.
FIG. 2D is a block diagram of the hydraulic fluid flow system of this embodiment. 3A, 3B, and 3C are diagrams showing conventional flow control valves, FIG. 3A is a sectional view showing the state of the flow control valve during normal brake operation, and FIG. 3B is a spool A cross-sectional view showing the state after the has moved slightly toward the decompression chamber side,
FIG. 3C is a sectional view showing the state after the spool has moved further toward the decompression chamber side. 4A, 4B, 4C, and 4D are diagrams showing other examples of conventional flow control valves, and FIG. 4A shows the state of the flow control valve during normal brake operation. A sectional view, FIG. 4B is a sectional view showing the state after the spool has moved slightly toward the decompression chamber side, and FIG. 4C is a sectional view showing the state after the spool has further moved toward the decompression chamber side. FIG. 4D is a sectional view showing the state after the solenoid valve is closed from the state shown in FIG. 4C. In the figure, 102 is a master cylinder, 103
1 is a flow rate control valve, 104 is a wheel brake, 105 is a solenoid valve, 106 is a reservoir, 107 is a pump, 1
08 is a motor, 109 is a housing, 110 is an inlet port, 111 is an outlet port, 112 is an outlet port, 113, 114, 115 are channels, 116 is a cylinder hole, 117 is a spool, 118 is a pressurizing chamber, 1
19 is a decompression chamber, 120a and 120b are outer circumferential grooves, 1
21a, 121b, 122 are flow channels, 123 is a fixed orifice, 124, 125 are flow channels, 126 is an outer peripheral groove, 127 is a small channel closing edge, 128a is a variable orifice edge, and 128b is a large channel closing edge. , 129 indicates a spring. In addition, in each figure, the same number indicates the same or equivalent element.

Claims (1)

[Claims for Utility Model Registration] An inlet port connected to a pressure source, an outlet port connected to a wheel brake, an outlet port connected to a normally closed discharge path, and a cylinder connected to each of the ports. a housing having a hole, a fluid passage extending through the housing so as to communicate with both ends thereof and forming a fixed orifice at an intermediate position; and a large flow passage closure for closing the large flow passage. a spool comprising an edge portion and a variable orifice edge portion for forming a variable orifice, the spool being slidably housed in the cylinder hole and switching communication between the ports by movement of the spool; a spring biased toward the side, and when the anti-lock control is inactive, the spool is in the inactive position and connects the large flow path connecting the inlet port and the outlet port, and the normally closed During anti-lock control depressurization to open the discharge passage, the spool moves against the urging force of the spring, thereby opening the large flow passage connecting the inlet port and the outlet port. A passage closing edge portion closes the passage and connects the outlet port and the discharge port to a communicating state, and when repressurizing the antilock control to close the discharge passage, the inlet port and the fixed A small flow path connecting the orifice and the outlet port is formed, and a variable orifice is formed in the middle of this small flow path by the variable orifice edge portion of the spool and the housing, and the hydraulic pressure before and after the fixed orifice is In the flow control valve for an antilock device of a vehicle, the flow path area of the variable orifice is automatically adjusted so that the differential pressure of the variable orifice becomes a constant value, the large flow path closing edge portion and the variable orifice edge portion 1. A flow control valve for a vehicle anti-lock device, characterized in that the flow control valve comprises a common edge portion.