Integrated exhaust system apparatus

Patent metadata

Field	Value
Publication number	US-11486337-B2
Application number	US-201916563308-A
Country	US
Kind code	B2
Filing date	Sep 6, 2019
Priority date	Sep 6, 2019
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

An integrated exhaust system apparatus to be mounted on an engine is provided. The apparatus includes an apparatus housing; an engine interface; an exhaust system interface with a first exhaust apparatus outlet configured to direct a first portion of exhaust through the housing wall; an EGR interface with a second exhaust apparatus outlet configured to direct a second portion of exhaust through the apparatus housing wall; and an exhaust manifold arranged within the apparatus interior. The exhaust manifold includes a first manifold outlet configured to direct the first portion of exhaust out of the manifold interior and a second manifold outlet configured to direct the second portion of exhaust out of the manifold interior. An EGR cooler is arranged within the apparatus interior with passages fluidly coupled such that the second portion of exhaust is directed out of the apparatus housing via the second exhaust apparatus outlet.

First claim

What is claimed is:

1. An integrated exhaust system apparatus configured to be mounted on an engine generating an exhaust, comprising:
an apparatus housing including at least one apparatus housing wall defining an apparatus interior and mounting structures for mounting the apparatus housing to the engine;
an engine interface positioned in the at least one apparatus housing wall with a plurality of exhaust apparatus inlets configured to direct the exhaust from cylinders of the engine directly through the at least one apparatus housing wall into the apparatus interior;
an exhaust system interface positioned in the at least one apparatus housing wall with at least one first exhaust apparatus outlet configured to direct a first portion of the exhaust from the apparatus interior through the at least one apparatus housing wall;
an EGR (exhaust gas recirculation) interface positioned in the at least one apparatus housing wall with at least one second exhaust apparatus outlet configured to direct a second portion of the exhaust from the apparatus interior through the at least one apparatus housing wall;
an exhaust manifold arranged within the apparatus interior proximate to the exhaust apparatus inlets and extending along a manifold longitudinal axis, the exhaust manifold including:
a manifold wall defining a plurality of inlet ports arranged in a line parallel to the manifold longitudinal axis and a manifold interior configured to receive the exhaust from the exhaust apparatus inlets, each of the inlet ports corresponding to one of the cylinders of the engine,
a first manifold outlet within the manifold wall opening to all the plurality of inlet ports and configured to direct the first portion of the exhaust out of the manifold interior, wherein the first manifold outlet is fluidly coupled to the at least one first exhaust apparatus outlet, the first manifold outlet being arranged approximately in a center portion of the exhaust manifold along the manifold longitudinal axis such that that first portion of the exhaust flows out of the manifold interior approximately perpendicular to the manifold longitudinal axis, and
a second manifold outlet within the manifold wall opening to all the plurality of inlet ports and configured to direct the second portion of the exhaust out of the manifold interior, the second manifold outlet being arranged proximate to a first end of the exhaust manifold along the manifold longitudinal axis;

an EGR cooler arranged within the apparatus interior and including a plurality of EGR cooler exhaust passages with first EGR cooler exhaust passage ends fluidly coupled such that the EGR cooler exhaust passages receive the second portion of the exhaust and second EGR cooler exhaust passage ends fluidly coupled such that the second portion of the exhaust is directed out of the EGR cooler exhaust passages to be directed out of the apparatus housing via the at least one second exhaust apparatus outlet; and
an EGR hot side conduit arranged within the apparatus interior and extending between the second exhaust manifold outlet and the first EGR cooler exhaust passage ends to fluidly couple the exhaust manifold to the EGR cooler, the EGR cooler exhaust passages being arranged generally parallel to the manifold longitudinal axis such that the second portion of exhaust is directed from one or more of the cylinders of the engine through the exhaust manifold at approximately 180° into the EGR cooler exhaust passages via the second manifold housing outlet and the EGR hot side conduit.

2. The integrated exhaust system apparatus of claim 1 , wherein the EGR hot side conduit is generally L-shaped.

3. The integrated exhaust system apparatus of claim 1 , wherein the EGR hot side conduit is generally U-shaped.

4. The integrated exhaust system apparatus of claim 1 , wherein the EGR hot side conduit has a first end coupled to the second exhaust manifold outlet and a second end coupled to the first EGR cooler exhaust passage ends, and wherein at least one of the first end or second end of the EGR hot side conduit is formed by a bellows structure.

5. The integrated exhaust system apparatus of claim 1 , further comprising an EGR cool side conduit arranged within the apparatus interior and extending between the second EGR cooler exhaust passage ends and the at least one second exhaust apparatus outlet.

6. The integrated exhaust system apparatus of claim 1 , further comprising a cooling circuit with a coolant inlet defined in the at least one apparatus housing wall, a coolant outlet defined in the at least one apparatus housing wall, and at least one coolant cavity within the apparatus interior forming a coolant flow path between the coolant inlet and the coolant outlet such that coolant flows into the apparatus housing via the coolant inlet, flows through the at least one coolant cavity, and flows out of the apparatus housing via the coolant outlet.

7. The integrated exhaust system apparatus of claim 6 , wherein the at least one coolant cavity includes a first coolant cavity surrounding at least a portion of the EGR cooler exhaust passages such that heat is transferred from the exhaust within EGR cooler exhaust passages into the coolant.

8. The integrated exhaust system apparatus of claim 7 , wherein the at least one coolant cavity further includes a second coolant cavity surrounding at least a portion of the EGR hot side conduit.

9. The integrated exhaust system apparatus of claim 8 , wherein the at least one coolant cavity further includes a third coolant cavity surrounding at least a portion of the exhaust manifold.

10. The integrated exhaust system apparatus of claim 9 , wherein the third coolant cavity at least partially extends between the manifold wall and the at least one apparatus housing wall to function as a heat shield for the exhaust manifold.

11. The integrated exhaust system apparatus of claim 1 , wherein at least a portion of the manifold wall is formed by a lattice structure configured to inhibit heat transfer from the exhaust within the manifold interior through the manifold wall.

12. The integrated exhaust system apparatus of claim 1 , wherein the at least one apparatus housing wall has an inner surface facing the apparatus interior and an outer surface opposite the inner surface, and wherein the apparatus housing forms a first turbocharger flange on the outer surface of the at least one apparatus housing wall at the exhaust system interface, the first turbocharger flange defining a first mounting surface configured to receive a first turbocharger.

13. The integrated exhaust system apparatus of claim 12 , wherein the apparatus housing forms a second turbocharger flange on the outer surface of the at least one apparatus housing wall that defines a second mounting surface configured to receive a second turbocharger.

14. The integrated exhaust system apparatus of claim 1 , wherein the mounting structures include a plurality of mounting through-holes configured to receive fasteners to mount the apparatus housing to the engine.

15. The integrated exhaust system apparatus of claim 1 , wherein at least the apparatus housing, the exhaust manifold, and the EGR cooler are formed with additive manufacturing.

16. An engine arrangement, comprising:
an engine configured to generate exhaust;
an integrated exhaust system apparatus mounted to the engine and including:
an apparatus housing including at least one apparatus housing wall defining an apparatus interior and a plurality of mounting structures for mounting the apparatus housing directly to the engine;
an engine interface positioned in the at least o

Assignees

• Deere & Co

Inventors

• Haaland Eric J
• Nagathan Veeresh

Classifications

• F28F1/14

  and extending longitudinally (F28F1/38 takes precedence) · CPC title

• F28D21/0003

  the heat being recuperated from exhaust gases (F28D21/0014 takes precedence) · CPC title

• F28F1/40

  the means being only inside the tubular element · CPC title

• F28F1/42

  the means being both outside and inside the tubular element · CPC title

• F28F1/126

  consisting of zig-zag shaped fins (F28F1/105 takes precedence) · CPC title