Engine acoustical signal sampling device and because automobile engine fault detection system of acoustical signal

The utility model discloses an engine acoustical signal sampling device and because automobile engine fault detection system of acoustical signal, including acoustical signal sampling device, data processing unit with locate the display element of auttombilism room, data processing unit and display element signal connection are connected with the data processing unit is electric to the acoustical signal sampling device, wherein: sound signal sampling unit include sound sensor, preamplifier, gain control ware, back mixing fold the wave filter and D the converter, the vocal print signal of engine is gathered to the sound sensor of locating the engine, the vocal print signal of collection in proper order through preamplifier, gain control ware, back mixing fold the wave filter, D behind converter input data processing unit. The utility model discloses need not to dismantle the car and can the anytime and anywhere accuracy monitor the automobile engine state, compare in the engine failure detection device based o