Patent ID: 11913543
Assignee: ZF FRIEDRICHSHAFEN AG
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 10:
11. 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 at least one further shifting element of the vehicle transmission
closing the shifting elements associated with the driving gear:
determining that an operating temperature of the vehicle transmission has been reached or exceeded; and
engaging the neutral gear of the vehicle transmission.