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Electronic power steering

The steering transmission with an electronic amplifier (EPS) using the same components as in the conventional power steering system. In addition, the power steering unit and the control unit on the front panel under a radio receiver has a solenoid valve. To control the flow of fluid in the steering gear, a solenoid is fed with current from a control unit which receives a signal from VSS (vehicle speed sensor).

Electronic power EPS controls the current supplied to the solenoid bypass valve based on the signals input from the sensor and controls the amount of fluid in the cylindrical chamber, thereby changing the force control according to the vehicle speed.

Control block EPSCM mounted on the front panel under a radio receiver

Solenoid valves EPS

Solenoid valve is located in the steering gear and controls the flow of fluid power steering. Solenoid valve consists of a spring outlet, and a piston plunger.

The input current is changed from 0 A to 1 A, depending on the vehicle speed and is controlled by the control unit EPS. When the ignition current begins to flow through the solenoid valve and lifts the piston and the piston, respectively, in contact with the plunger against the spring. With increasing vehicle speed decreases current flow, and the plunger is moved downward by the spring.

When lifting the piston overlaps the flow of fluid through the opening in the power steering, and the total pressure is transferred to the liquid. But when the opening is opened, since the piston is moved down, the liquid is drained from the valve into the tank through the opening in the valve.

If you want to remove the block EPS, be sure to disconnect the connector to avoid damaging the unit.