| Classification and working principle of three-way machine wearing solenoid valve
The three-way machine produced by our company is mainly divided into: two three-way solenoid valve is divided into normally closed and normally open two kinds, normally closed refers to the coil is not energized when the gas road is broken, normally open refers to the coil is not energized when the gas road is through.
Normally closed two three-way solenoid valve action principle: the coil is energized, the gas is connected, the coil once power off, the gas will be disconnected, which is equal to "point". Normally open type two three-way single electronic control solenoid valve operation principle: to the coil electricity, gas disconnect, the coil once power off, gas will be connected, this is also the "point".
Two five-way double electronic control solenoid valve action principle: to the positive action coil energized, is the action gas circuit connected (is the action air vent gas), even if the positive action coil after power is still the action gas circuit simulation is connected, will be maintained until the anti-action coil energized. Energize the counter action coil, and the counter action air circuit is connected (the counter action air outlet has air). Even if the counter action coil is powered off, the counter action air circuit simulation is still connected, and it will be maintained until the positive action coil is energized. This is tantamount to self-locking. Two three-way solenoid valves are usually one in two out series. There is also the expression "normally open and normally closed". Solenoid valve three mouth separately for A\B\C three mouth, as usual is A to B mouth general A to C mouth, there are B to C mouth. Normally closed type is the solenoid valve power back, valve blockade, normally closed type. That is, it cannot flow out of port A.
Two things together, the 3-way magnet valve (v-type regulating ball valve solenoid valve has closed cavity, open a hole in the differences of position, every hole leads to the differences of tubing, cavity center is valve, both sides are two electromagnets, which face the magnet coil electricity body which side will be attracted to, through process control the motion of the body to blocked or discharge of oil leakage of differences in the hole, And the oil inlet hole is normally open, hydraulic oil will enter the divergent tubing, and then through the pressure of the oil to urge the oil just piston, piston and start the piston rod, piston rod idea machine assembly. The current passing through the electromagnet thus restrains the mechanical action.
Each brake wheel pump has a three-way three-way solenoid valve, three-way solenoid valve has three things, pressure and decompression process. Boost process: there is no current flowing in the electromagnetic coil, and the solenoid valve is in the boost position at this time, the brake pump is similar to the wheel pump. The brake fluid from the brake pump directly flows to the wheel pump, and the pressure of the wheel pump changes with the pressure of the main pump. At this time, the ABS system does not matter, nor does the return pump. Pressure holding process: when THE ABS ECU to the electromagnetic coil into a small connection current (about half of the maximum current), the solenoid valve is in the connection pressure position, all channels are truncated. At this time, the master pump, the wheel pump and the oil return hole are isolated from each other and sealed, so that the brake wheel pump is connected with a certain brake pressure. Decompression process: one of the most of our factory when the ABS ECU to electromagnetic coil, when the current value of the eve of the plunger moves to the top, the access of the master cylinder and wheel cylinder is truncated, solenoid valve in the stress position, the electromagnetic valve will wheel pump and oil return channel similar or similar to the receiver, the wheel brake fluid flows through the electromagnetic valve of pump, into the receiver, rushed down the wheel brake pump pressure. At the same time, the driving electric idea is started, the hydraulic pump is started, and the brake fluid flowing back to the hydraulic tank is pressurized and transported to the master cylinder, which is ready for the next braking cycle.
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