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US 7,861,683 B2Granted
Diagnosis device for vehicle
AssigneeDenso Corporation
InventorsSoichi Saitoh, Eijirou Yamada
Life of this patent
Estimating the term…
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AssigneeDenso Corporation
InventorsSoichi Saitoh, Eijirou Yamada
Estimating the term…
After an engine automatic stop processing is started, a diagnosis of a starter is started at a time of t1 when an engine speed drops to a diagnosis starting speed. Before the engine speed drops to the lower limit speed at which an engine can be restarted without being cranked by the starter, the diagnosis of the starter is conducted. In the diagnosis of the starter, it is determined whether the starter is faulty based on a current passing through the starter when a relay is turned off to stop energization of the starter before the starter actually rotates after the relay is turned on. Thereby, a malfunction of the starter can be detected before the engine is automatically stopped. It is avoided to automatically stop the engine which is incapable of being automatically restarted due to the malfunction of the starter.
A diagnosis device for a vehicle provided with a function of switching a relay provided between an actuator and an electric power supply to control an energization of the actuator, the diagnosis device comprising:
A diagnosis device for a vehicle provided with a function of performing an automatic stop/start control in which an internal combustion engine is automatically stopped when a specified automatic stop condition is established and the internal combustion engine is automatically started when a specified automatic start condition is established, and a starter cranking the internal combustion engine to automatically start the internal combustion engine, the diagnosis device comprising:
A diagnosis device for a vehicle provided with a function of performing an automatic stop/start control in which an internal combustion engine is automatically stopped when a specified automatic stop condition is established while the vehicle is running and the internal combustion engine is automatically started when a specified automatic start condition is established, and a function of switching a relay provided between a starter cranking the internal combustion engine to automatically start the internal combustion engine and an electric power supply in order to control an energization of the starter, the diagnosis device comprising:
Dependencies are inferred from the claim text.