| 摘要 |
PROBLEM TO BE SOLVED: To efficiently suppress increase of the cost caused by increase in the number of sensors.SOLUTION: A diagnostic device for an intake system of an engine 10 where a compressor 14A of a supercharger 14 and an intercooler 15 are disposed in order from an upstream side in an intake passage 11 includes a first intake temperature sensor 31 which is provided in the intake passage 11 between the compressor 14A and the intercooler 15 and in which the ordinary temperature region and the high temperature region are included in the detection temperature range, a second intake temperature sensor 32 which is provided in the intake passage 11 in the downstream side of the intercooler 15 and in which at least the ordinary temperature region is included in the detection temperature range, and a diagnosis section 41 for diagnosing reliability of the first and the second intake temperature sensors based on sensor values of the first and the second intake temperature sensors 31 and 32.SELECTED DRAWING: Figure 2 |
