Title: The Effect of Fuel Injection Pressure on the Diesel Engine Performances
Abstract: The purpose of this paper is to reveal the effect of fuel injection pressure on the power and torque of a diesel engine.The research method used is the experimental method.Pressure variations of 110 kg/cm 2 , 120 kg/cm 2 and 130 kg/cm 2 were applied to a 1981 Chevrolet LUV diesel car.From the experimental results of research conducted at the Automotive Engineering Vehicle Workshop, Faculty of Engineering, Universitas Negeri Padang, it was found that, at a standard pressure of 120 kg/cm 2 obtained an average car power of 29.6 kW at 4470 RPM and 81.65 Nm of torque at 2455 RPM.When the injector pressure is reduced by 110 kg/cm 2 , engine power decreases by 17.1% and torque decreases by 16.2%.When the injector pressure is increased to 130 kg/cm2, there is an increase in engine power by 4.05% and a decrease in torque by 14.89%.