Limp home control method under disconnected state of battery...

Details Limp home control method under disconnected state of battery... Limp home control method under disconnected state of battery...

2006-03-07

2006-03-07

Dolinar, Andrew M. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

Reexamination Certificate

active

07010422

ABSTRACT:
Limp home control methods are provided for situations of a disconnected battery power line. Preferred methods may comprise steps of: determining whether a battery voltage (V_EL) provided to an Engine Control Unit (ECU) via a main relay is less than or equal to a first standard value; correcting vehicle control factors according to the battery voltage (V_EL), if the battery voltage (V_EL) provided to the Engine Control Unit (ECU) via the main relay is larger than the first standard value; determining whether a battery voltage (V_IGK) provided to the ECU via an ignition key is less than or equal to a second standard value, if the battery voltage (V_EL) provided to the ECU via the main relay is less than or equal to the first standard value; determining that a line providing the battery voltage (V_EL) from a rear end of the main relay to the ECU is disconnected, if the battery voltage (V_IGK) provided to the ECU via the ignition key is larger than the second standard value; and correcting vehicle control factors according to the battery voltage (V_IGK) provided to the ECU via the ignition key, if the line providing the battery voltage (V_EL).

REFERENCES:
patent: 4580222 (1986-04-01), Fujii
patent: 6662780 (2003-12-01), Yook
Derwent abstract of KR 369166 B, Jan. 24, 2003, and KR 2002037829 A, May 23, 2002, Jang.
Patent Abstracts of Japan, Publication No. 2001-327001 (2001).

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