Automatic transmission control method using map data

Details Automatic transmission control method using map data Automatic transmission control method using map data

1996-08-02

1999-03-30

Nguyen, Tan Q.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

701 65, 701208, 701217, F16H 5966, B60K 4128

Patent

active

058900870

ABSTRACT:
An automatic transmission control method using map data includes the steps of: operating a map in said CD-ROM; mapping said magnetic position of said vehicle by using said earth magnetism sensor; measuring a climbing angle of said vehicle from an angle sensor mounted in said vehicle; judging whether said climbing angle is beyond a constant angle .theta.; judging conditions of said approaching road, such as a position of a peak, when said climbing angle is greater than said constant angle .theta.; maintaining a current gear by confirming a condition for keeping a transmission, or changing a gear by performing a shift in transmission; and repeating said steps by mapping again said magnetic position of the vehicle. As described above, in the automatic transmission control method using map data, the navigation system previously senses a state of the approaching road by using the earth magnetism sensor and the map data, and the TCU prevents an unnecessary transmission by confirming a condition for keeping the transmission.

REFERENCES:
patent: 3881368 (1975-05-01), Furuhashi et al.
patent: 4713764 (1987-12-01), Klatt
patent: 5148721 (1992-09-01), Anan et al.
patent: 5154250 (1992-10-01), Murai
patent: 5598335 (1997-01-01), You

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