| 摘要 |
PROBLEM TO BE SOLVED: To surely detect an increase-decrease in a fuel injection quantity caused by the degradation with the lapse of time in a injection quantity abnormality detecting device and an injection quantity correcting device of a diesel engine for detecting the occurrence of abnormality and correcting the fuel injection quantity by detecting a change with the lapse of time of the fuel injection quantity caused by long-term use. SOLUTION: This device is provided with an exhaust gas temperature sensor 24 being arranged in an exhaust gas passage 23 of the diesel engine 10 and detecting an exhaust gas temperature a head temperature sensor 18 for detecting a head temperature of the diesel engine 10, an engine speed sensor 25 and a memory 31 for storing the proper temperature ratio being the ratio of the exhaust gas temperature to an engine temperature in a state of injecting fuel of a target fuel injection quantity with every engine operation state. The actual temperature ratio being the ratio of an actual exhaust gas temperature to an actual engine temperature is arithmetically operated from a detecting result of the respective sensors 18, 24 when operating the engine, and a difference quantity of an actual fuel injection quantity to the target fuel injection quantity is recognized by comparing the proper temperature ratio corresponding to the operation state stored in the memory 31 with the actual temperature ratio. The fuel injection quantity is corrected on the basis of this difference quantity.
|
