Steering
That the steering has not turned to a hard work, all models Audi A4 possess the hydraulic amplifier – so-called сервоуправлением. Thus auxiliary force is the hydraulic liquid being under a high pressure which in the case of the steering mechanism moves on gear рейку, functioning as the piston. In what direction is pumped up thus a liquid, you define, turning a steering wheel. This rotation is transferred to the system of valves regulating a direction and quantity of a stream of a liquid. Pressure in hydraulic system is created лопастным by the pump with a drive from the engine by means of клинового or клиноребристого a belt.
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