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1. WO2020117890 - SYSTÈME DE RÉCUPÉRATION DE LA CHALEUR DE GAZ D'ÉCHAPPEMENT

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

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CLAIMS

What is claimed is:

1. An exhaust gas heat recovery (EGHR) system, comprising:

a housing assembly including first and second shells defining an inlet, an outlet, and a first exhaust gas passageway in fluid communication with the inlet and the outlet; a heat exchanger assembly at least partially defining a second exhaust gas passageway in fluid communication with the inlet and the outlet and including a heat exchanger core having a working fluid circulating therein, the working fluid being in thermal communication with exhaust gas in the second exhaust gas passageway; and a valve assembly disposed within the housing assembly and including a valve shaft and a valve plate attached to the valve shaft, the valve plate rotatable between a first position whereat exhaust gas flow through the first exhaust gas passageway is allowed and exhaust gas flow through the second exhaust gas passageway is prevented, the valve plate being rotatable to a second position whereat exhaust gas flow through the second exhaust gas passageway is allowed and exhaust gas flow through the first exhaust gas passageway is prevented, wherein the first and second shells are attached to each other at a joint, an axis of the valve shaft being positioned at the joint of the first and second shells.

2. The EGHR system of Claim 1 , wherein the heat exchanger assembly includes end cones that are disposed at opposing ends of the heat exchanger core and attached to the first shell of the housing assembly.

3. The EGHR system of Claim 2, wherein a gap exists between the heat exchanger assembly and the first shell.

4. The EGHR system of Claim 1 , wherein the first and second shells cooperate to define openings at opposing sides of the housing assembly.

5. The EGHR system of Claim 4, wherein the valve assembly includes a valve housing having trunnions at opposing sides thereof, and wherein the trunnions extend through the openings at the opposing sides of the housing assembly.

6. The EGHR system of Claim 5, wherein the trunnions are attached to the first and second shells at the joint.

7. The EGHR system of Claim 6, wherein a cavity extends at least partially through each trunnion, and wherein a ring and a bushing are disposed on opposing ends of the valve shaft and within the cavity.

8. The EGHR system of Claim 1 , further comprising an actuator assembly attached to the valve shaft and mounted to the housing assembly.

9. The EGHR system of Claim 1 , further comprising a baffle extending from an inner surface of the housing assembly into the first exhaust gas passageway and defining an opening, wherein the valve plate is sealingly engaged with the valve housing when in the second position and sealingly engaged with the baffle when in the first position.

10. The EGHR system of Claim 9, wherein the valve plate is sealingly engaged with the baffle downstream of the heat exchanger assembly when the valve plate is in the first position such that fluid flow downstream of the heat exchanger assembly through the second exhaust passageway is reduced.