Exhaust manifold stiffening ribs
AssigneeCummins Inc.
InventorsStephen Sunadh Gidla, Ryan Nelson Knight
Life of this patent
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Abstract
An exhaust manifold apparatus for routing an exhaust gas produced by an internal combustion engine is described. The manifold includes a manifold log with a log wall that defines a log bore. The log bore is in fluid communication with an upstream opening of the manifold log and a downstream opening of the manifold log. An inlet runner includes a runner wall that defines a runner bore in fluid communication with the log bore. The inlet runner is engaged to the manifold log at a stress point, which also includes at least one stiffening rib disposed on an interior surface of the log wall and/or the inlet runner wall.
Claims19
A manifold for routing an exhaust gas produced by an internal combustion engine to an aftertreatment system, the manifold comprising:
- a manifold log including a log wall, the log wall having a first log thickness and defining a log bore in fluid communication with a first opening at an upstream end thereof and a second opening at a downstream end thereof;
- an inlet runner operatively connected to the manifold log at the first opening, the inlet runner including a runner wall having a first runner thickness and defining a runner bore in fluid communication with a third opening at a downstream end of the inlet runner and a fourth opening at an upstream end of the inlet runner, wherein the third opening engages the first opening of the manifold log at a stress point;
- and
- at least one stiffening rib disposed on an interior surface of the runner wall, the at least one stiffening rib comprising a runner rib disposed on the runner wall and exposed to the runner bore at the stress point, the runner rib and the runner wall in combination providing a second runner thickness.
A manifold assembly for routing an exhaust gas produced by an internal combustion engine to an aftertreatment system, the manifold assembly comprising:
- a plurality of inlet runners in fluid receiving communication with a cylinder head at respective upstream ends thereof, the plurality of inlet runners operatively engaged to and in fluid providing communication with a manifold log at a corresponding plurality of stress points at downstream ends thereof, each of the plurality of inlet runners including a runner wall having a first runner thickness;
- a manifold log in fluid receiving communication with the plurality of inlet runners at the corresponding plurality of stress points and in fluid providing communication with at least one outlet, the manifold log including a log wall having a first log thickness;
- and
- a plurality of stiffening ribs, each of the plurality of stiffening ribs beings disposed on an interior surface of the runner wall of a respective one of the plurality of inlet runners at one of the plurality of stress points, wherein at least one of the plurality of stiffening ribs and a runner wall associated with the at least one of the plurality of stiffening ribs in combination provide a second runner thickness.
Dependencies are inferred from the claim text.