Gas Concentration Sensor, Motor Vehicle Having A Gas Concentration Sensor, And Method For Measuring Gas Concentration

摘要

A motor vehicle having a gas concentration sensor and a method for measuring gas concentration using the gas concentration sensor the gas concentration sensor having a sound transmitter, a sound receiver and a control device by which a phase shift between the sound signal transmitted by the sound transmitter and a sound signal received by the sound receiver can be controlled to a predefinable phase shift. A change in a composition of a gas mixture can be detected by an analysis unit on the basis of a change in frequency of the sound signal relative to a frequency of a reference sound signal.