| 摘要 |
PROBLEM TO BE SOLVED: To improve an engine rotating speed for allowing split injection of a fuel while preventing overheating of a pressure-rise control circuit portion for quickly exciting an electromagnetic coil for fuel injection by pressure-rise high voltage.SOLUTION: A pressure-rise opening/closing element 115 for generating a pressure-rise high voltage Vh, includes a through rate selection circuit 115s, suppresses generation of noise by lowering a selection value k at a low temperature of the pressure-rise opening/closing element 115, and suppresses temperature rise by increasing the selection value k at a high temperature. An internal average temperature of an on-vehicle engine control device 100 is detected by an environmental temperature detection element 139, calculates a relation between an allowable engine rotating speed Nk and the selection value k to continue split injection under a present measured environmental temperature Tx on the basis of reference data 400 disposed in a calculation control circuit portion 130, and determines the proper selection value k corresponding to a present engine rotating speed Ne.SELECTED DRAWING: Figure 1 |
