Idle speed adjustment is carried out by the throttle itself. Adjustment is made by the idling actuator (motorized). The precise setting of the throttle valve coordinates is carried out depending on the voltage and current in the position controller. Electric is added to the typical throttle control using traction. It regulates idle speed and dampens deceleration when "gas release" only when idling is turned on will the desire of the driver be revealed. In the adjustable range, the throttle valve is set (regardless of the position of the rope sheave and drive) for a larger opening angle. Outside the adjustable range, the throttle valve is set only by the throttle cable, in other words, at the request of the driver. Adjustment range by means of an electric motor is up to 50 kg/h air mass (cold start).
In an emergency condition, the throttle valve is set to an air quantity of approximately 11 kg/h, without the driver having any influence on the reset. The return signal about the position of the actuator and the throttle valve to the control unit is carried out by two potentiometers.
To allow a linear increase in the amount of air (minimizing shocks and optimizing the quality of adjustment) by changing the throttle opening angle, the air inlet is shaped (within adjustable range) calottes (spherical surface).