This paper described the characteristics of a turbocharged diesel engine for automobile driven under various suction temperature and pressure. Inlet temperature to engine were changed by electric heater consist of coil fin heat exchanger up to 30〜180℃. The experiments were carried out on partial load and engine speed from 1000 to 1800 rpm at 2/3 engine control lever position and the power and combustion characteristics were compared with 6 kinds of temperature range. As a results, the following are clarified. Power output and specific fuel consumption is improved remarkably as increasing engine speed.
