Abstract
This research presents performance improvement of direct injection diesel engine by mounting continuous exhaust variable valve timing, and accumulated pressure type electric control fuel injection system that is highly safe as it involves no high-pressure piping. Inside the accumulated pressure chamber, safety valve, reverse valve, and high-pressure plunger are installed. The plunger operates by pumping cam that is fixed to an exhaust cam shaft.
This paper describes plain structure of accumulated electric controlling fuel injection system, that is highly safe as it involves no high-pressure piping. In addition , this new continuous intake and exhaust variable valve timing enables to change lift and valve timing at the same time, as it activates rocker arm parallel to three dimensional cam shaft. Variable control is obtained by moving rocker arm and by rotating a screw counter close wise by a stepping motor drive. Experiment result shows that the structure is very simple, and enables smooth and variable movement.