| 摘要 |
A fuel injection characteristic sensing device obtains an injection characteristic of a target injector (20) (an injector of each cylinder (50) of a multi-cylinder engine) at each time. The device has a program (S21) for sequentially sensing fuel pressure at a sensing point corresponding to a fuel pressure sensor (20a), which is provided at a fuel inlet of each injector (20), based on an output of the fuel pressure sensor (20a). The device has a program (S31 - S33, S41 - S43, S51- S53) for detecting predetermined timings (injection timings such as an injection start timing and an injection end timing) in a series of operations concerning fuel injection of the injector (20) of each cylinder (50) based on the sequentially sensed fuel pressure. Thus, the injection characteristic at each time including a temporal characteristic change can be obtained. |
