The eccentric shaft spring should also be regularly checked for proper operation in order to avoid any kind of breakdown.Ģ.
Marine engineers must ensure that these valves are free from any obstruction or excessive play.
Freeness of Mechanical Parts: The actuator of Variable Injection Timing (VIT) operates on the movement of eccentric shaft of suction and spill control valves. When working with a ship’s Main Engine, which is equipped with Variable Injection Timing (VIT) device, a marine engineer must know the following points for smooth engine operation:ġ. Variable Injection Timing (VIT) allows to achieve maximum combustion pressure during part load operation which helps in decreasing the fuel consumption and also achieve efficient combustion in the engine.īy controlling the injection timing of the fuel in the fuel delivery pump and advancing the fuel pump injection timing, VIT increases the maximum pressure in the engine. The Variable Injection Timing (VIT) function of a marine diesel engine comes into play during load dependent adjustment of the combustion pressure.