A temperature compensation system for compensating a collector-voltage controlled RF amplifier. The digital frame may further include a display module, a frame, a memory module, a control module, an input module, a power supply module, and a sense module. An objective shared by the participants is presented. For the regeneration of the exhaust treatment device, the temperature in the exhaust pipe is increased in that an outlet valve opening up the combustion chamber in the direction of the exhaust pipe is opened in the range of the upper compression dead center of the piston.