Engine with automatic constant temperature device for inlet temperature

The invention relates to the field of engines, in particular to an engine with an automatic constant temperature device for inlet temperature. The engine comprises an engine body and a carburetor connected with the engine body via an air inlet venture, and a cavity in the venture is provided with an automatic constant temperature heating device for mixed gas. The engine has the advantage of simple structure and is convenient to install. According to the engine, the atomization effect of the mixed gas and fuel burning efficiency are improved, the engine is easier to ignite in winter, engine ignition time in winter is shortened, meanwhile, motorcycle oil consumption is lowered, the content of pollutants in tail gas is lowered, environment is protected, and the engine can be guaranteed to normally and stably work.