Method for preventing a motor vehicle from rolling off

Patent metadata

Field	Value
Publication number	US-2016347292-A1
Application number	US-201515111958-A
Country	US
Kind code	A1
Filing date	Jan 22, 2015
Priority date	Feb 5, 2014
Publication date	Dec 1, 2016
Grant date	—

Abstract

The invention relates to a method for preventing a motor vehicle from rolling away, in which the motor vehicle includes an automated manual transmission, preferably a dual-clutch transmission. In the method in which a vehicle of this type is reliably prevented from rolling away, the NEUTRAL selector lever position is engaged only when the motor vehicle is at a standstill and a motor vehicle brake has been actuated.

First claim

1 . A method for preventing a motor vehicle from rolling away, wherein the motor vehicle comprises an automated manual transmission which engages a gear when a selector lever is in a NEUTRAL position, the method comprising engaging the NEUTRAL selector lever position only when the motor vehicle is at a standstill and after actuating a brake of the motor vehicle.

2 . The method as claimed in claim 1 , further comprising arranging the NEUTRAL selector lever position to be engageable only when an engine speed is zero.

3 . The method as claimed in claim 1 , further comprising automatically engaging the brake when the vehicle is at a standstill.

4 . The method as claimed in claim 3 , further comprising a control unit of the motor vehicle requesting the engagement of the brake, said control unit monitoring an operating state of the motor vehicle.

5 . The method as claimed in claim 4 , further comprising monitoring the operating state of the motor vehicle on the basis of at least one of the selector lever position, the engine speed, or a status of the brake.

6 . The method as claimed in claim 4 , further comprising the control unit requesting a deactivation of the brake when the selector lever is moved into a position other than the NEUTRAL position.

7 . The method as claimed in claim 4 , wherein an automatic activation of the brake is prevented by a manually actuated element on the selector lever.

8 . A method for preventing a motor vehicle from rolling away, wherein the motor vehicle comprises an automated manual transmission which engages a gear when a selector lever is in a NEUTRAL position, the method comprising outputting at least one of an acoustic or visual warning signal when the NEUTRAL selector lever position is selected while an engine of the motor vehicle is running and the brake is deactivated.

9 . The method as claimed in claim 8 , further comprising mechanically blocking the NEUTRAL selector lever position when the engine of the motor vehicle is running and the brake has not been actuated.

10 . The method as claimed in claim 8 , further comprising outputting at least one of a visual or acoustic warning signal if the brake is manually deactivated while the engine of the motor vehicle is running.

11 . The method of claim 1 , wherein the automated manual transmission is a dual clutch transmission.

Assignees

• Schaeffler Techbikigues Ag & Co Kg
• Schaeffler Technologies Ag

Inventors

• Schmitt Werner

Classifications

• F16H61/20

  Preventing gear creeping {; Transmission control during standstill, e.g. hill hold control} · CPC title

• B60T7/12 Primary

  for automatic initiation; for initiation not subject to will of driver or passenger {(limiting speed of vehicles other than rail vehicles B60K31/00)} · CPC title

• F16H59/54

  dependent on signals from the brakes, e.g. parking brakes · CPC title

• F16H61/22

  Locking {of the control input devices} (constructional features of locking or disabling mechanisms F16H63/34) · CPC title

• F16H2061/223

  Electrical gear shift lock, e.g. locking of lever in park or neutral position by electric means if brake is not applied; Key interlock, i.e. locking the key if lever is not in park position · CPC title