Muffler for a two-stroke engine
First Claim
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1. A muffler for a two-stroke internal combustion engine, comprising:
- an expansion chamber, at least a portion of the expansion chamber having a double wall including an inner wall panel and an outer wall panel which is spaced apart from the inner wall panel,a partition plate in the expansion chamber dividing the expansion chamber into a first expansion subchamber and a second expansion subchamber, the partition plate having a passage communicating the first expansion subchamber and the second expansion subchamber,an exhaust gas introducing port communicating the first expansion subchamber with an exhaust port of the engine for introducing a rush of exhaust gas from the exhaust port of the engine into the first expansion subchamber;
an external air intake means proximate to the exhaust gas introducing port for inducting by suction due to the rush of the introduced exhaust gas external air into the first expansion subchamber, andan exhaust gas cleaner mounted in the passage through the partition plate.
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Abstract
A muffler for a two-stroke internal combustion engine has an expansion chamber into which a rush of exhaust gas is introduced from the engine. In the vicinity of an exhaust gas inlet from the engine into the expansion chamber, the muffler has an external air intake for external air to be suctionally introduced into the expansion chamber by the rush of exhaust gas. With the external air introduced, carbon monoxide (CO) emission into the ambient is reduced.
58 Citations
6 Claims
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1. A muffler for a two-stroke internal combustion engine, comprising:
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an expansion chamber, at least a portion of the expansion chamber having a double wall including an inner wall panel and an outer wall panel which is spaced apart from the inner wall panel, a partition plate in the expansion chamber dividing the expansion chamber into a first expansion subchamber and a second expansion subchamber, the partition plate having a passage communicating the first expansion subchamber and the second expansion subchamber, an exhaust gas introducing port communicating the first expansion subchamber with an exhaust port of the engine for introducing a rush of exhaust gas from the exhaust port of the engine into the first expansion subchamber; an external air intake means proximate to the exhaust gas introducing port for inducting by suction due to the rush of the introduced exhaust gas external air into the first expansion subchamber, and an exhaust gas cleaner mounted in the passage through the partition plate. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification