Operating principle
The speed signal from the tachometer is evaluated by the ECU and transmitted to the converter, which controls the flow of pressurized oil from the feedback cavities to the return circuit.
1 - speedometer;
2 - control device;
3 - electro-hydraulic converter;
4 - right camera reverse action;
5 — left chamber of reverse action;
6 - right valve piston;
7 - left valve piston;
8 - right check valve;
9 - left check valve;
10 - right throttle;
11 - left throttle;
12 — the right compartment of the cylinder;
13 — the left compartment of the cylinder;
14 - back pressure limiting valve.
Functioning
Turning the steering wheel clockwise moves the right piston (6) valve. The pressurized oil is thus discharged into the right compartment (12) cylinder, as well as through the right check valve (8) to the right compartment (4) feedback.
When in PARKING state (at the same time, speed signals and valve do not come from the tachometer (3) transducer remains closed), oil flows through the throttles (10) And (11) to the left compartment (5) feedback. Closed left check valve (9) prevents oil from draining into the left, non-pressurized, return-connected compartment (13) cylinder.
Since in both compartments (4) And (5) feedback, there is the same pressure, there is no reaction moment on the steering wheel. This ensures ease of steering.
When driving at medium speeds, the valve (3) transducer does not open fully. The reduced pressure is transferred to the left compartment (5) feedback, while the right compartment (4) feedback is under full pressure.
The moment of reaction acting in the pistons (6) And (7) valves are smaller. Strengthening the steering is achieved by increasing the backlash.