摘要 |
PROBLEM TO BE SOLVED: To provide a common rail type fuel injection device capable of calculating simply the fuel injection start timing in each injector by making identical the pressure propagation time from different injectors to a pressure sensor installed on a common rail. SOLUTION: Symbol L0 represents the distance from the mounting position Ss of a pressure sensor 22 on a common rail 24 to the respective connecting positions Sa-Sd of fuel supply pipes 25a-25d with the common rail 24 while the symbol L represents the length of the fuel supply pipes 25a-25d from the respective connecting positions Sa-Sd to injectors 4a-4d, and the total L0+L is made the same so as to make identical the pressure propagation time required for a pressure change to feed the fuel. Therefore, the time going back from the common rail pressure drop start timing sensed by the pressure sensor 22 for calculating the fuel injection start timing becomes the same for different injectors 4a-4d. |