Method for determining composition of e.g. benzene and alcohol mixture in diesel engine of motor vehicle, involves coupling light of wavelength into chamber, where wavelength of light is smaller than wavelength range of backscattered light

摘要

The method involves coupling a light of a predetermined wavelength into a measuring chamber (60) by a sensor arrangement (1) i.e. alcohol sensor. A fuel mixture is guided through the chamber before reaching an internal combustion engine (80). A backscattered light from a scattering volume (64) of the mixture is decoupled inside the chamber and is supplied to a detector unit (40). An optical sensor (42) i.e. photodiode, is provided for detecting a wavelength of the backscattered light, where the wavelength of the coupled light is smaller than a wavelength range of the backscattered light. An independent claim is also included for a device for determining a composition of a fuel mixture in an internal combustion engine.