Unit for recovering thermal energy from exhaust gas of an internal combustion engine

摘要

A unit for recovering thermal energy from exhaust gas of an internal combustion engine including an inlet, an outlet, a heat exchanger arranged downstream of the inlet and upstream of the outlet, and a valve capable of being switched between a recovery position. The exhaust gas flows from the inlet through the heat exchanger to the outlet, and a bypass position, in which the exhaust gas flows from the inlet through a bypass to the outlet. The valve includes separate first and second valve bodies and associated separate first and second valve seats arranged upstream and downstream of the heat exchanger, respectively. The first and second valve bodies are adapted to be switched only simultaneously from the recovery position to the bypass position and vice versa.

主权项

1. A unit for recovering thermal energy from exhaust gas of an internal combustion engine, comprising:
an inlet for the exhaust gas to enter the unit; an outlet for the exhaust gas to exit the unit; a heat exchanger in fluid communication with the inlet and the outlet, said heat exchanger being arranged downstream of the inlet and upstream of the outlet with respect to the flow of the exhaust gas through the unit; and a valve capable of being switched between a recovery position, in which the exhaust gas is directed to flow from the inlet through the heat exchanger to the outlet, and a bypass position, in which the exhaust gas is directed to flow from the inlet through a bypass to the outlet, wherein the valve comprises separate first and second valve bodies and associated separate first and second valve seats for receiving the separate first and second valve bodies in the recovery position and in the bypass position, wherein the first valve body and the associated first valve seat are arranged upstream of the heat exchanger and the bypass, respectively, with respect to the flow of the exhaust gas through the unit, wherein the second valve body and the associated second valve seat are arranged downstream of the heat exchanger and the bypass, respectively, wherein the first valve body comprises a first valve flap and the second valve body comprises a second valve flap, the first valve flap being connected to a first axle and the second valve flap being connected to a second axle so that the first and second valve flaps are capable of being pivotally switched between the recovery position and the bypass position, and wherein each of the first and second valve seats comprises a pair of frames which are arranged angularly spaced from one another, the frames having a size and shape such that the respective valve flap abuts against one of the frames of the respective pair of frames when the valve flap is in the recovery position and abuts against the other one of the frames of the pair of frames when the valve flap is in the bypass position; and wherein the first and second valve bodies are adapted to be switched only simultaneously from the recovery position to the bypass position and vice versa.