Exhaust gas manifold

Abstract

An exhaust gas manifold for an internal combustion engine in which there is provided an outer shell including an outer sleeve having a pair of end caps closing the ends thereof. An inner shell is carried within the outer shell and is formed by a plurality of slidably interfit inner sleeves which are supported in spaced relation to the outer sleeve on mounting members mounted on a second pair of end caps closing the ends of said inner shell and connected to said first pair of end caps. A plurality of inlet conduits and an outlet conduit are connected to said outer shell, and a plurality of inlet conduits and an outlet conduit are also connected to said inner shell with the conduits on said inner shell being carried in, and movable with respect to, the conduits on said outer shell.

We claim: 
     
       1. An exhaust gas manifold for an internal combustion engine, comprising an outer shell formed from an outer sleeve having a first pair of end caps mounted thereon closing the ends of said outer sleeve, a plurality of slidably interfit inner sleeves carried within said outer sleeve, .Iadd.said inner sleeves having annular inwardly projecting offsets formed thereon, .Iaddend.a second pair of end caps connected to said outer sleeve and said first pair of end caps, means mounted on said second pair of end caps and slidably interconnected to the outer ends of the outermost pair of said inner sleeves for supporting said inner sleeves in spaced relation to said outer sleeve, a first outlet conduit connected to said outer shell and projecting outwardly therefrom, a second outlet conduit in open communication with said inner sleeves carried in said first outlet conduit and movable with respect to said first outlet conduit, a plurality of longitudinally spaced first inlet conduits connected to said outer shell and projecting outwardly therefrom, and a plurality of second inlet conduits fixedly connected to said inner sleeves in open communication therewith .[.slidably.]. carried in said first inlet conduits .Iadd.in spaced relation thereto .Iaddend.and movable with respect to said first inlet conduits. 
     
     
       2. An exhaust gas manifold as set forth in claim 1 with the addition that .[.a collar.]. .Iadd.an adapter conduit .Iaddend.is mounted in said first outlet conduit, and said second .[.inlet.]. .Iadd.outlet .Iaddend.conduit is slidably supported in said .[.collar.]. .Iadd.adapter conduit.Iaddend.. 
     
     
       3. An exhaust gas manifold as set forth in claim 1 in which said first inlet and outlet conduits are mounted on said outer sleeve, and said second inlet and outlet conduits are mounted on said inner sleeves and project outwardly through openings in said outer sleeve for reception in said first inlet and outlet conduits. 
     
     
       4. An exhaust gas manifold as set forth in claim 1 in which said first outlet conduit is mounted on one of said first pair of end caps, said second outlet conduit is mounted on one of said second pair of end caps and projects outwardly through an opening in said one of said first pair of end caps for reception in said first outlet conduit, said first inlet conduits are mounted on said outer sleeve, and said second inlet conduits are mounted on said inner sleeves and project outwardly through openings in said outer sleeve for reception in said first inlet conduits. 
     
     
       5. An exhaust gas manifold as set forth in claim 2 in which each of said first end caps has a central wall in a plane normal to the longitudinal axis of said outer sleeve and integral with a peripheral flange parallel with said outer sleeve, and each of said second pair of end caps comprises an end wall in a plane generally normal to said longitudinal axis and integral with an annular wall parallel with said longitudinal axis, an annular radially extending web parallel with said end wall and connected at one of its ends to said annular wall and at its opposite end to an annular flange parallel with said peripheral flange, the webs on said second end caps abut and are rigidly connected to the adjacent portion of the central walls on said first end caps and the annular flanges on said second end caps abut and are rigidly connected to said outer sleeve and said perpheral flanges on said first end caps. 
     
     
       6. An exhaust gas manifold for an internal combustion engine, comprising an outer shell formed from an outer sleeve having a first pair of end caps mounted thereon closing the ends of said outer sleeve, a plurality of slidably interfit inner sleeves carried within said outer sleeve, a second pair of end caps connected adjacent their periphery to said outer sleeve and first pair of end caps, each of said second pair of end caps having its central portion offset inwardly toward the center of the manifold, means mounted on said central portion of said second pair of end caps and slidably interconnected to the outer ends of the outermost pair of said inner sleeves for supporting said inner sleeves in spaced relation to said outer sleeve, a first outlet conduit connected to said outer shell and projecting outwardly therefrom, a second outlet conduit in open communication with said inner sleeves carried in said first outlet conduit and movable with respect to said first outlet conduit, a plurality of longitudinally spaced first inlet conduits connected to said outer shell and projecting outwardly therefrom, and a plurality of second inlet conduits fixedly connected to said inner sleeves in open communication therewith .[.slidably.]. carried in said first inlet conduits .Iadd.in spaced relation thereto .Iaddend.and movable with respect to said first inlet conduits. 
     
     
       7. An exhaust gas manifold as set forth in claim 5 in which said means for supporting the inner sleeves comprises two pairs of rings with the rings in each pair having their outer ends rigidly interconnected to said annular wall on one of said second end caps and their inner ends projecting inwardly therefrom, the inner ends of said rings in each pair being spaced apart and received over the end of the adjacent inner sleeve for slidably supporting said adjacent inner sleeve. 
     
     
       8. An exhaust gas manifold as set forth in claim 5 in which first and second outlet conduits, said first and second inlet conduits, said inner and outer sleeves, and the central portions of said first and second pairs of end caps are each spaced from each other and a compressible insulation is carried in said spaces.