Pipe mechanism for exhaust gas recirculation system
AssigneeAisin Seiki Kabushiki Kaisha
InventorAtsutoshi Ikegawa
Life of this patent
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Abstract
A pipe mechanism for an exhaust gas recirculation system includes a joint pipe connected to an exhaust pipe, an inner tube through which flows exhaust gas, and an outer tube. The inner tube has an upstream end and a downstream end, with the downstream end being located in the intake pipe. The outer tube has an upstream end connected with the joint pipe and a downstream end attached on the outer surface of the inner tube. The outer tube is located around the inner tube with a predetermined clearance between the inner and outer tubes.
Claims19
A pipe mechanism for an exhaust gas recirculation system comprising:
- a joint pipe connected to an exhaust pipe,
- an inner tube through which exhaust gas is adapted to flow, the inner tube having an upstream end and a downstream end, the downstream end of the inner tube being positioned in an intake pipe;
- and
- an outer tube having an upstream end connected to the joint pipe and a downstream end attached to the outer surface of the inner tube, the outer tube being located around the inner tube with a clearance between the inner tube and the outer tube.
A pipe mechanism in an exhaust gas recirculation system comprising:
- a joint pipe connected to an exhaust pipe,
- a main pipe positioned between the joint pipe and an intake pipe of the exhaust gas recirculation system, the main pipe being comprised of an inner tube through which exhaust gas is adapted to flow and an outer tube, the outer tube having an inner surface and the inner tube having an outer surface;
- the inner surface of the outer tube facing the outer surface of the inner tube, with the inner surface of the outer rube being spaced from the outer surface of the inner tube over at least a portion of the length of the main pipe to provide a clearance;
- the inner and outer tubes each having an upstream end portion and a downstream end portion;
- the downstream end portion of the inner tube extending into the intake pipe;
- the upstream end portion of the inner tube being unconnected to the pipe joint;
- the downstream end portion of the inner tube being connected to the downstream end portion of the outer tube at a connection portion;
- the upstream end portion of the outer tube being connected to the joint pipe.
Dependencies are inferred from the claim text.