Automated transmission and method of controlling the same
AssigneeGetrag Ford Transmissions GmbH
InventorsMartin Leibbrandt, Ulrich Eggert
Life of this patent
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Abstract
An automated gear shift transmission and method of controlling the same are described. The transmission is installed in a motor vehicle comprising several forward gears and at least one reverse gear and that allows choosing from several different driving modes by means of a driving mode selector lever. A forward gear is maintained in engagement in case of an uphill orientation of the motor vehicle when the parking mode is chosen. Instead of the forward gear, a reverse gear is maintained in engagement in case of a downhill orientation of the motor vehicle when the parking mode is chosen. This allows taking specific driving conditions or driving situations into account with relatively simple means.
Claims18
A method of controlling an automated gear shift transmission installed in a motor vehicle comprising several forward gears and at least one reverse gear and that allows choosing from several different driving modes (P, R, N, D) by means of a driving mode selector lever, comprising:
- maintaining a forward gear in engagement in case of an uphill orientation of the motor vehicle, in the following referred to as uphill position, when a parking mode (P) is chosen;
- maintaining instead of the forward gear a reverse gear in engagement in case of a downhill orientation of the motor vehicle that is in the following referred to as the downhill position, when the parking mode (P) is chosen;
- maintaining the forward gear in engagement in case of the uphill position of the motor vehicle when an idle driving mode (N) is chosen;
- and
- maintaining instead of the forward gear the reverse gear in engagement in the downhill position of the motor vehicle when the idle driving mode (N) is chosen.
An automated dual clutch gear shift transmission adapted to be installed in a motor vehicle, said automated dual clutch gear shift transmission comprising:
- a first partial gearbox with a first clutch and a first group of gears including a reverse gear and the a lowest forward gear;
- a second partial gearbox with a second clutch and a second group of gears;
- several forward gears in the first and the second partial gearbox;
- a driving mode selector lever for choosing from several different driving modes (P, R, N, D);
- and
- a control apparatus for maintaining a forward gear in engagement in case of an uphill orientation of the motor vehicle, in the following referred to as uphill position, when a parking mode (P) is chosen, and for maintaining instead of the forward gear a reverse gear in engagement in case of a downhill orientation of the motor vehicle that is in the following referred to as the downhill position, when at least one of the parking mode (P) and an idle driving mode (N) is chosen.
Dependencies are inferred from the claim text.