Engine exhaust apparatus
First Claim
1. An engine exhaust apparatus for purifying an exhaust gas discharged from an exhaust port of an engine and lowering the exhaust noise level, said apparatus comprising:
- a sound suppressing section for lowering the exhaust noise level as the exhaust gas discharged from the exhaust port passes through the sound suppressing section;
an ejector section for introducing secondary air into the exhaust gas delivered from the sound suppressing section and mixing the secondary air and the exhaust gas so as to cool said whole exhaust apparatus by inducing said secondary air through ejecting effect of said exhaust gas; and
a post-treatment section for purifying the gas mixture delivered from the ejector section so as to completely purify said exhaust gas in a simple structure.
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Accused Products
Abstract
An engine exhaust apparatus comprises a sound suppressing section for lowering the exhaust noise level as an exhaust gas discharged from the exhaust port passes through it. The exhaust apparatus is provided with an ejector section for introducing secondary air into the exhaust gas delivered from the sound suppressing section and mixing the gases, and a post-treatment section for purifying the gas mixture delivered from the ejector section. The exhaust gas discharged from an exhaust manifold gets into the ejector section through the sound suppressing section, and is then purified in the post-treatment section. Therefore, the ejector effect cannot be reduced by the sound suppressing section which is subject to high flow resistance. Thus, the exhaust noise level can be lowered with the ejector effect of the introduction of the secondary air improved considerably, and low cost and simple construction can be enjoyed.
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Citations
13 Claims
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1. An engine exhaust apparatus for purifying an exhaust gas discharged from an exhaust port of an engine and lowering the exhaust noise level, said apparatus comprising:
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a sound suppressing section for lowering the exhaust noise level as the exhaust gas discharged from the exhaust port passes through the sound suppressing section; an ejector section for introducing secondary air into the exhaust gas delivered from the sound suppressing section and mixing the secondary air and the exhaust gas so as to cool said whole exhaust apparatus by inducing said secondary air through ejecting effect of said exhaust gas; and a post-treatment section for purifying the gas mixture delivered from the ejector section so as to completely purify said exhaust gas in a simple structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification