WASTE HEAT RECOVERY SYSTEM OF AN INTERNAL COMBUSTION ENGINE, AND METHOD FOR OPERATING A WASTE HEAT RECOVERY SYSTEM OF AN INTERNAL COMBUSTION ENGINE

摘要

Waste heat recovery system of an internal combustion engine, wherein the waste heat recovery system has an operating fluid circuit 1 with at least one heat exchanger 2, 2a which is connected in a waste heat flow of the internal combustion engine 5, an expansion machine 11 which is coupled to an electric machine 16, a condenser 12 and a fluid pump. According to the invention, a waste heat recovery system for an internal combustion engine 5 and a method for operating a waste heat recovery system of this type are specified, which waste heat recovery system is improved in comparison with the prior art. This is achieved by virtue of the fact that a device for reducing the rotational speed of the expansion machine 11 is provided, and that the reduction in the rotational speed of the expansion machine 11 can be set by means of the device which is, in particular, the electric machine 16, in a manner which is dependent on an operating state of the internal combustion engine 5 and/or of the waste heat recovery system.