Patent ID: 9227629
Filing Date: 2016-01-05
CPC Classification: B60K,B60W,F16H,Y02T,Y10S,Y10T

Claim Text:
1. A method of operating a hybrid drive-train of a vehicle in which, depending on an operating situation, an internal combustion engine (VM) and an electric machine (EM) act, either individually or together, to drive a vehicle transmission (GE) with shiftable gears, the internal combustion engine (VM) and the electric machine (EM) are engageable or disengageable by a controllable separating element (K 0 ), and in which, starting from an electric motor driving mode, either a drag start of the internal combustion engine (VM) by the electric machine (EM) or an externally assisted start of the internal combustion engine (VM) by a separate starting device (ZS) occurs, the method comprising the steps of: when a shift process of the vehicle transmission (GE) is in progress and a demand for either a drag start or an externally assisted start of the internal combustion engine (VM) occurs, then depending on whether the shift process is either an upshift process, a downshift process, a traction shift process or an overdrive shift process and also depending on the type of the required start of the internal combustion engine (VM), checking whether the shift process should either be completed, at least partially completed, or discontinued before the drag start or the externally assisted start is carried out, and depending on a result of the check, initiating appropriate necessary measures to continue, to at least partially complete, or to discontinue the shift process.