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Exhaust manifold for four-cylinder engine

  • US 20030167759A1
  • Filed: 03/06/2003
  • Published: 09/11/2003
  • Est. Priority Date: 03/08/2002
  • Status: Active Grant
First Claim
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1. An engine comprising:

  • four cylinders;

    an exhaust manifold mounted to a cylinder head of the engine; and

    four exhaust manifold branches included in the exhaust manifold and arranged to each cylinder, wherein two exhaust manifold branches of two cylinders that are not fired in succession are convergent at a convergence angle equal to or below 20 degrees to form a first convergent exhaust manifold branch, two exhaust manifold branches of another two cylinders that are not fired in succession are convergent at a convergence angle equal to or below 20 degrees branch to form a second convergent exhaust manifold branch, and the first convergent manifold e second convergent exhaust manifold branch are thereafter made convergent.

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