US 7,029,421 B2 · Method for operating an automatic gearbox on a motor vehicle

Abstract

A method is described for operating an automatic transmission in which a command for changing a current ratio of the automatic transmission is generated when achieving preset operating states of the vehicle automatically or by manual input in a manual shifting mode, the activated manual shifting mode being preferred to an automatic shifting mode. The manual shifting mode is quit when a current vehicle speed is less than a threshold value, or when a longitudinal acceleration of the vehicle is within a defined range, a lateral acceleration is less than a threshold value and a driver type evaluation counter is less than a limiting value.

Claims20

Dependent claims

A method for operating an automatic transmission (3) comprising the steps of:

generating a command automatically or by manual input in a manual shifting mode, to change a current ratio of the automatic transmission (3) when achieving a preset operating state of the vehicle, an activated shifting mode being preferred to the manual shifting mode;
and
ending the manual shifting mode when a current vehicle speed is less than a threshold value and ending the manual shifting mode when at least one of the three following criteria are met:
a longitudinal acceleration of the vehicle is within a defined range;
a lateral acceleration of the vehicle is less than the threshold value;
and
a driver type evaluation counter is less than a limiting value.

4 more elements

A method for operating an automatic transmission (3) comprising the steps of:

generating a command automatically or by manual input in a manual shifting mode, to change a current ratio of the automatic transmission (3) when achieving a preset operating state of the vehicle, the activated shifting mode being preferred to the manual shifting mode;
and
encing the manual shifting mode when a current vehicle speed is less than a threshold value or when the three following criteria are met:
a longitudinal acceleration of the vehicle is within a defined range;
a lateral acceleration of the vehicle is less than the threshold value;
and
a driver type evaluation counter is less than a limiting value, and
activating a shift program coordinated with the actual driver type evaluation counter during a change to the automatic shifting mode.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

10/478,358Filed 18 May 2002

Priority

DE 101 25 69825 May 2001

Published

US 2004/0266583 A130 Dec 2004

Granted

18 Apr 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

F16H 61/0213
For gearshift control, e.g. control functions for performing shifting or generation of shift signal: characterised by the method for generating…
F16H 59/0204
Selector apparatus: for automatic transmissions with means for range selection and manual shifting, e.g. range selector with tiptronic
F16H 59/48
Control inputs to control units of change-speed- or reversing-gearings for conveying rotary motion: inputs being a function of acceleration
F16H 59/72
Inputs being a function of gearing status: dependent on oil characteristics, e.g. temperature, viscosity

Method for operating an automatic gearbox on a motor vehicle

Life of this patent

Method for operating an automatic gearbox on a motor vehicle

Life of this patent

Abstract

Claims20