Exhaust manifold of gasoline engine
First Claim
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1. An exhaust manifold for an internal combustion engine comprising:
- first, second, third, and fourth runners, each runner having upper and lower ends, wherein the runners are secured at their upper ends to a cylinder head;
a mixing pipe surrounding the lower ends of the runners;
the lower ends of the runners being connected to the mixing pipe in a substantially longitudinal direction such that exhaust gases are introduced into the mixing pipe without colliding with the inner walls of the mixing pipe;
the first and second runners being joined to each other over a connecting portion at their lower ends prior to connection with the mixing pipe;
the third and fourth runners being joined to each other over a connecting portion at their lower ends prior to connection with the mixing pipe;
at least one crescent shaped exhaust flow guider formed integrally with the connecting portion where the first runner joins the second runner and where the third runner joins the first runner; and
the runners having an oval cross section at their upper ends and transitioning to a circular cross section at their lower ends.
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Abstract
An exhaust manifold of an internal combustion gasoline engine includes first, second, third and fourth runners and mixing pipe, one end of each runner being connected to a cylinder head and another end of each runner being connected to the mixing pipe wherein the runners are connected to the mixing pipe in a longitudinal direction such that exhaust gases are introduced into the mixing pipe without colliding into an inner wall of the mixing pipe.
24 Citations
3 Claims
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1. An exhaust manifold for an internal combustion engine comprising:
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first, second, third, and fourth runners, each runner having upper and lower ends, wherein the runners are secured at their upper ends to a cylinder head;
a mixing pipe surrounding the lower ends of the runners;
the lower ends of the runners being connected to the mixing pipe in a substantially longitudinal direction such that exhaust gases are introduced into the mixing pipe without colliding with the inner walls of the mixing pipe;
the first and second runners being joined to each other over a connecting portion at their lower ends prior to connection with the mixing pipe;
the third and fourth runners being joined to each other over a connecting portion at their lower ends prior to connection with the mixing pipe;
at least one crescent shaped exhaust flow guider formed integrally with the connecting portion where the first runner joins the second runner and where the third runner joins the first runner; and
the runners having an oval cross section at their upper ends and transitioning to a circular cross section at their lower ends. - View Dependent Claims (2, 3)
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Specification