Steering assist devices. In vehicles, in which the front axle is heavily loaded, e.g. in buses, trucks, steering the front wheels requires considerable effort by the driver. Some heavy vehicles use hydraulic or pneumatic aids to reduce physical strain on the driver. In such a vehicle, the steering wheel is indirectly coupled through the steering gear and the system of steering rods both with the steering knuckles., and with a special actuator. By turning the steering wheel while making a turn, the actuator is activated, which usually acts on steering link rods. Thus, when the front wheels are turned, they are acted upon by the force applied by the driver to the steering wheel and by the force of the cylinder.. Overall, the booster increases the axial pressure on the longitudinal rod, caused by turning the steering wheel. This device is only activated after the steered wheels are slightly deviated from the current direction of travel, so it works with a certain inertia.