Controllable air intake system for an internal combustion engine and control process therefor

An air intake system for an internal combustion engine of a motor vehicle, comprising a main air inlet, a moisture sensor, an evaluator, a valve, an air filter, and an auxiliary air inlet;

• wherein the main air inlet comprises an inlet opening arranged at an advantageous location for air intake and is connected to communicate with the air filter;
• a clean air line is arranged downstream of the air filter and connected to communicate with the internal combustion engine;
• the moisture sensor has a signal output connected to communicate with the evaluator;
• the valve is movably arranged in the main air inlet so as to selectively open or close the main air inlet and is connected so as to communicate with the evaluator;
• the auxiliary air inlet is arranged at a moisture protected location and communicates with the clean air line;
• the moisture sensor is arranged in the main air inlet in such a manner that moisture entering the main air inlet can be sensed, and the evaluator is connected to communicate with at least one other sensor arranged outside the intake system and provided to detect and signal other functions, and the evaluator produces a switching logic which controls the valve in response to the signal of the moisture sensor together with the signal of the other sensor.