Diagnostic apparatus for temperature sensor
AssigneeMitsubishi Jidosha Kogyo Kabushiki Kaisha
InventorsShoya Tano, Hideo Matsunaga, Junya Kitada
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Abstract
A first temperature sensor measures a first temperature of an object related to an engine. A fuel temperature sensor measures a fuel temperature. A diagnostic apparatus includes a diagnostic unit diagnosing the first temperature sensor based at least in part on the first temperature measured at the first temperature sensor. The diagnostic apparatus also includes a first determining unit determining whether the state of fault of the first temperature sensor is unclear or not based at least in part on the variation in the fuel temperature after the start-up of the engine for the diagnosis at the diagnostic unit.
Claims16
A diagnostic apparatus for a temperature sensor mounted in a vehicle, comprising:
- a first temperature sensor measuring a first temperature of an object related to an engine in the vehicle;
- a fuel temperature sensor measuring a fuel temperature in the vehicle, the fuel temperature being different from the first temperature;
- a diagnostic unit diagnosing the first temperature sensor based at least in part on the first temperature measured at the first temperature sensor at a start-up of the engine;
- and
- a first determining unit determining whether the state of fault of the first temperature sensor is unclear or not based at least in part on whether a difference between an initial fuel temperature measured by the fuel temperature sensor at a start-up of the engine and a fuel temperature measured by the fuel temperature sensor after the start-up of the engine is within a predetermined range for the diagnosis at the diagnostic unit.
Dependencies are inferred from the claim text.