Patent ID: 7526916

Claim:
A drive train comprising: a hydrodynamic machine, comprising: at least one primary impeller; a secondary impeller, said secondary and said at least one primary impeller forming a working chamber that can be filled with a working medium; at least one control valve; a control unit for actuating said at least one control valve in order to control the flow of the working medium into or out of said hydrodynamic machines wherein said control unit comprises at least one electronic modular unit controlling and/or monitoring said hydrodynamic machine or a pre-given state in the latter, a cooling medium circuit being configured to cool said at least one electronic modular unit; said cooling medium circuit with a liquid or gaseous cooling medium, said cooling medium circuit being configured to cool the working medium and said control unit, wherein the or gaseous cooling medium is the working medium; and an engine, said hydrodynamic machine is connected in said cooling medium circuit in series with said engine so that the liquid or gaseous cooling medium flows through said hydrodynamic machine and said engine, and wherein said control unit and said at least one control valve are arranged in a cooling medium inlet region of said hydrodynamic machine, wherein said hydrodynamic machine is arranged in said cooling medium circuit downstream of said engine.