Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1997-01-17
1998-09-22
Elms, Richard T.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
60300, B60L 100
Patent
active
058118845
ABSTRACT:
An onboard load control apparatus and a method for detecting a fault of an onboard electrical load with high accuracy are disclosed. The control apparatus comprises an onboard battery mounted on an automotive vehicle, an electrical heater for electrically heating an electrical load such as an electrically-heated catalyst supplied with power from the onboard battery, an auxiliary relay for turning on/off the power to the electrical heater from the onboard battery, and an ECU for controlling the on/off operation of the auxiliary relay. The apparatus further comprises an engine speed detector for detecting the engine speed of the internal combustion engine and a fault judgement unit for judging whether the electrical heater is normal or faulty on the basis of the fluctuation amount of the engine speed of the internal combustion engine detected by the engine speed detector before and after switching the auxiliary relay. A fault of the electrical load is judged by detecting the voltage across the onboard battery while taking the fluctuation amount of the same voltage into consideration. The apparatus further comprises a load condition holder for holding the load condition of a specific load while the engine speed or the battery voltage is detected.
REFERENCES:
patent: 5404720 (1995-04-01), Laing
patent: 5512789 (1996-04-01), Lyon
patent: 5523547 (1996-06-01), Miller
patent: 5645745 (1997-07-01), Hartwick et al.
Furuhashi Michio
Goto Yuichi
Harima Kenji
Iisaka Sigemitu
Kawai Takashi
Elms Richard T.
Toyota Jidosha & Kabushiki Kaisha
LandOfFree
Automotive onboard load control apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automotive onboard load control apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automotive onboard load control apparatus and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1625088