With a precondition that a cooling water temperature sensor 16 and an intercooler exit gas temperature sensor 18 have been determined normal, whether an EGR cooler efficiency calculated is within a normal range is determined. When within the normal range, ...

To enable rapid sensing of a fault in an oil pressure sensor system after a start of an engine while suppressing an increase in the number of parts of an ECU in a device and a method for oil pressure sensor fault sensing for a vehicle. An oil pressure sens...

A fuel supply device includes a low-pressure fuel pump (8) for sucking fuel from a fuel tank (1), a high-pressure fuel pump (2) for pressurizing the sucked fuel, an accumulator (3) for accumulating the pressurized fuel, fuel injection valves (4) for direct...

This invention provides a control device and so forth in which there is an improvement in the reliability of error detection in a case where a single control section performs control of a drive unit of a vehicle by concurrently executing two programs that ...

The present invention provides for a method and device for monitoring an ambient humidity sensor in a combustion engine, where the monitoring of the ambient humidity sensor is made by comparing the ambient humidity measured by said humidity sensor and an a...

Temperatures of intake-air temperature, intercooler outlet temperature and intake manifold temperature sensors are compared in cold time of an engine to determine any characteristic abnormality of the sensors. A first temperature difference is obtained fro...

The fuel pressure sensor (58) is located in a fuel accumulator (55) of an engine with fuel pumps (51,54) and injection valves (34). A temporary change in the fuel pressure determined by the sensor is compared to a temporary change in an estimated fuel pres...