| 摘要 |
PROBLEM TO BE SOLVED: To provide an engine fuel injection device calculating time when a changed ratio of exit pressure of a common rail exceeds a preliminarily determined threshold value as actual fuel injection starting and terminating time and performing fuel injection on a target injection condition. SOLUTION: Time when a changed ratio Dp of common rail exit pressure Pe at an exit to a fuel supply pipe of a common rail crosses a preliminarily determined threshold Ds and becomes lower than the threshold Ds is determined as each of first and second pressure lowering time t2, t5 of lowering common rail exit pressure Pe according to starting and terminating of fuel injection. Time retroactive by each first and second pressure lowering delay time Δts, Δte from each pressure lowering time t2, t5 is calculated as actual fuel injection starting and terminating time t1, t4. A command pulse is controlled so that actual fuel injection starting and terminating time may be matched with target injection time. |
