US 11,913,543 B2 · Method and transmission control apparatus for operating a multiple-speed vehicle transmission

Abstract

Disclosed is method for operating a multi-gear vehicle transmission having a plurality of shifting elements (A, B, C, D, E) for engaging gears of the vehicle transmission. In a neutral gear a transmission input (1) and a transmission output (2) of the vehicle transmission are decoupled from one another. In a driving gear the transmission input (1) and the transmission output (2) of the vehicle transmission are coupled with one another by closing the shifting elements (A, B, C, D, E) associated with the driving gear in order to propel the vehicle. When the neutral gear is engaged, a transmission condition is determined, and if a transmission condition with elevated drag losses exists, then in addition to the shifting elements (A, B, C, D, E) of a driving gear, at least one further shifting element (A, B, C, D, E) of the vehicle transmission is closed.

Claims12

Dependent claims

A method for operating a multi-gear vehicle transmission having shifting elements configured for engaging gears of the vehicle transmission, the method comprising:

decoupling a transmission drive input from a transmission drive output of the vehicle transmission when the vehicle transmission is in a neutral gear;
coupling the transmission drive input and the transmission drive output of the vehicle transmission when in a driving gear by closing shifting elements associated with the driving gear in order to propel the vehicle;
determining that a transmission condition with elevated drag losses exists when the neutral gear is engaged;
closing shifting elements of a forward gear to engage the forward gear;
and
closing shifting elements of a reversing gear to engage the reverse gear, wherein the shifting elements of the forward gear differ from the shifting elements of the reversing gear by only one shifting element.

3 more elements

Dependencies are inferred from the claim text.

Method and transmission control apparatus for operating a multiple-speed vehicle transmission

Life of this patent

Method and transmission control apparatus for operating a multiple-speed vehicle transmission

Life of this patent

Abstract

Claims12