Patent ID: 7698041
Filing Date: 2010-04-13
Classification: F02D,Y10T

Abstract:
1. A method for operating a drive unit that includes an engine and a transmission having a variable transmission ratio, comprising: determining an intended power output based on a gas pedal operation; determining an instantaneous setpoint power output quantity of the drive unit from the intended power output, maximal possible output torque of an engine at nominal speed, and minimal possible output torque of an engine at an instantaneous speed, wherein the setpoint power output quantity is a function of an instantaneous transmission ratio of the transmission, at least for a given intended power output; and for a change limitation, reducing, at least intermittently, a rate at which the instantaneous setpoint power output quantity approaches a target setpoint power output quantity corresponding to a later transmission ratio, the reducing occurring at least one of during and after a change limitation period corresponding to a change in the instantaneous transmission ratio from an earlier transmission ratio to the later transmission ratio; wherein: