Device and method for the recovery of waste heat from an internal combustion engine

摘要

The invention relates to a device and a method for the recovery of waste heat from an internal combustion engine (2), according to which a feed pump (6), a heat exchanger (8), an expansion engine (10) and a capacitor (12) are arranged in a circuit (4) containing a circulating working medium. A bypass connection (14) is mounted in parallel to the expansion engine (10), in the circuit (4), the expansion engine (10) being coupled to the circuit (4), or decoupled therefrom, according to an operating situation of the internal combustion engine (2).

主权项

1. A device for utilizing the waste heat of an internal combustion engine (2), having a line circuit (4) in which are arranged a feed pump (6), at least one heat exchanger (8), an expansion machine (10), and a condenser (12), wherein a working medium circulates in the line circuit (4), characterized in that a bypass connection (14) is connected in parallel with the expansion machine (10), in such a way that, as a function of an operating situation of the internal combustion engine (2), the expansion machine (10) is coupled into or decoupled from the line circuit (4) for waste-heat utilization, wherein both a bypass pressure regulating valve (16) and a pressure limiting valve (32) are arranged in parallel in the bypass connection (14).