IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0213818
(2005-08-30)
|
등록번호 |
US-7434656
(2008-10-14)
|
우선권정보 |
JP-2004-251281(2004-08-31) |
발명자
/ 주소 |
- Yasuda,Kazuhiro
- Koyanagi,Masashi
- Abe,Shintaro
- Yamamoto,Kazuo
- Oshima,Tadashi
|
출원인 / 주소 |
|
대리인 / 주소 |
Birch, Stewart, Kolasch & Birch, LLP
|
인용정보 |
피인용 횟수 :
14 인용 특허 :
28 |
초록
▼
An exhaust device includes an exhaust pipe connected at its upstream end to a cylinder head of the engine and an exhaust muffler connected to the downstream end of the exhaust pipe for suppressing the generation of noise from a heat insulating cover that covers a part of the exhaust pipe. A heat ins
An exhaust device includes an exhaust pipe connected at its upstream end to a cylinder head of the engine and an exhaust muffler connected to the downstream end of the exhaust pipe for suppressing the generation of noise from a heat insulating cover that covers a part of the exhaust pipe. A heat insulating cover covers a portion of the exhaust pipe near the engine and a stay is fixed to the heat insulating cover. The stay includes a supporting plate portion curved so as to partially surround the outer circumference of the exhaust pipe. A first vibration isolating member is provided that is sandwiched between the outer circumference of the exhaust pipe and the supporting plate portion, a band member is tightened to mount the supporting plate portion to the exhaust pipe, and a second vibration isolating member is sandwiched between the supporting plate portion and the band member.
대표청구항
▼
What is claimed is: 1. An exhaust device for an engine adapted to be mounted on a vehicle, said exhaust device having an exhaust pipe connected at its upstream end to a cylinder head of said engine and an exhaust muffler connected to the downstream end of said exhaust pipe, said exhaust device comp
What is claimed is: 1. An exhaust device for an engine adapted to be mounted on a vehicle, said exhaust device having an exhaust pipe connected at its upstream end to a cylinder head of said engine and an exhaust muffler connected to the downstream end of said exhaust pipe, said exhaust device comprising: a heat insulating cover for covering at least a portion of said exhaust pipe near said engine; a stay fixed to an inner surface of said heat insulating cover, said stay having a supporting plate portion curved so as to partially surround an outer circumference of said exhaust pipe, a pair of side plate portions disposed, respectively, on upstream and downstream sides on the supporting plate portion, the side plates being parallel to each other and extending along planes that are orthogonal to the axis of the front exhaust pipe, and a pair of mounting plate portions connected, respectively, to upstream and downstream outer ends of the side plate portions so as to make contact with the inner surface of the heat insulating cover; a first vibration isolating member sandwiched between the outer circumference of said exhaust pipe and said supporting plate portion; a band member adapted to be tightened to mount said supporting plate portion to said exhaust pipe; and a second vibration isolating member sandwiched between said supporting plate portion and said band member. 2. The exhaust device according to claim 1, wherein said first vibration isolating member and said second vibration isolating member are formed by bending a single vibration isolating sheet. 3. The exhaust device according to claim 1, wherein at least a part of said exhaust pipe has a double pipe structure including an inner pipe and an outer pipe surrounding said inner pipe, an annular resonance chamber being defined between said inner pipe and said outer pipe, said inner pipe being formed with a resonator hole communicating with said annular resonance chamber. 4. The exhaust device according to claim 2, wherein at least a part of said exhaust pipe has a double pipe structure including an inner pipe and an outer pipe surrounding said inner pipe, an annular resonance chamber being defined between said inner pipe and said outer pipe, said inner pipe being formed with a resonator hole communicating with said annular resonance chamber. 5. The exhaust device according to claim 3, wherein said inner pipe is fixed at one end thereof to said outer pipe and is slidably engaged at the other end with said outer pipe. 6. The exhaust device according to claim 4, wherein said exhaust muffler is provided with an inlet pipe, the downstream end of said outer pipe being fixed to said inlet pipe, one end of said inner pipe near said engine being fixed to the upstream end of said outer pipe. 7. The exhaust device according to claim 3, wherein said resonator hole is formed at one end portion of said inner pipe near said engine. 8. An exhaust device for an engine adapted to be mounted on a vehicle, said exhaust device having an exhaust pipe connected at its upstream end to a cylinder head of said engine and an exhaust muffler connected to the downstream end of said exhaust pipe, wherein: said exhaust muffler comprises an outer cylinder, end caps for closing the opposite ends of said outer cylinder, and an inner cylinder set in said outer cylinder so as to define an annular closed chamber between said inner cylinder and said outer cylinder; wherein a rear end of said outer cylinder, a forward end of said rear end cap, and a rear end of said inner cylinder are overlaid with respect to each other in an axial direction of the exhaust device and are welded together, the rear end of the inner cylinder being sandwiched between the rear end of the outer cylinder and the forward end of said rear end cap. 9. The exhaust device according to claim 8, wherein a large-diameter portion for making contact with the inner surface of said outer cylinder at its other end portion is formed at the other end of said inner cylinder. 10. The exhaust device according to claim 8, wherein an intermediate large-diameter portion for making contact with the inner surface of said outer cylinder at its intermediate portion is formed at an intermediate portion of said inner cylinder. 11. The exhaust device according to claim 9, wherein an intermediate large-diameter portion for making contact with the inner surface of said outer cylinder at its intermediate portion is formed at an intermediate portion of said inner cylinder. 12. The exhaust device according to claim 8, wherein a tapering portion is formed at any one of the opposite ends of said inner cylinder so as to be tapered inwardly toward a longitudinal axis of said inner cylinder. 13. An exhaust device comprising: an exhaust pipe adapted to be connected at an upstream end to a cylinder head of an engine and an exhaust muffler connected to a downstream end of the exhaust pipe; a heat insulating cover for covering at least a portion of said exhaust pipe; a stay fixed to an inner surface of said heat insulating cover, said stay having a supporting plate portion curved so as to partially surround an outer circumference of said exhaust pipe, a pair of side plate portions disposed, respectively, on upstream and downstream sides on the supporting elate portion, the side elates being parallel to each other and extending along planes that are orthogonal to the axis of the front exhaust pipe, and a pair of mounting elate portions connected, respectively, to upstream and downstream outer ends of the side plate portions so as to make contact with the inner surface of the heat insulating cover; a first vibration isolating member sandwiched between the outer circumference of an exhaust pipe and said supporting plate portion; a band member adapted to be tightened to mount said supporting plate portion to said exhaust pipe; and a second vibration isolating member sandwiched between said supporting plate portion and said band member. 14. The exhaust device according to claim 13, wherein said first vibration isolating member and said second vibration isolating member are formed by bending a single vibration isolating sheet. 15. The exhaust device according to claim 13, wherein at least a part of said exhaust pipe has a double pipe structure including an inner pipe and an outer pipe surrounding said inner pipe, an annular resonance chamber being defined between said inner pipe and said outer pipe, said inner pipe being formed with a resonator hole communicating with said annular resonance chamber. 16. The exhaust device according to claim 14, wherein at least a part of said exhaust pipe has a double pipe structure including an inner pipe and an outer pipe surrounding said inner pipe, an annular resonance chamber being defined between said inner pipe and said outer pipe, said inner pipe being formed with a resonator hole communicating with said annular resonance chamber. 17. The exhaust device according to claim 15, wherein said inner pipe is fixed at one end thereof to said outer pipe and is slidably engaged at the other end with said outer pipe. 18. The exhaust device according to claim 16, wherein said exhaust muffler is provided with an inlet pipe, the downstream end of said outer pipe being fixed to said inlet pipe, one end of said inner pipe near an engine being fixed to the upstream end of said outer pipe. 19. The exhaust device according to claim 15, wherein said resonator hole is formed at one end portion of said inner pipe near said engine. 20. The exhaust device according to claim 13, wherein said band member is tightened to the exhaust pipe by a bolt being in engagement with slits in said band member to permit the band member to be tightened relative to the exhaust pipe. 21. The exhaust device according to claim 8, further comprising a spark arrester mounted on an end plate portion of the one of said end caps, wherein the spark arrester has a longitudinal axis arranged at an angle to a longitudinal axis of the exhaust muffler. wherein the spark arrester is mounted on the end plate portion at a substantially central portion thereof so as to project into a rear compartment of the exhaust muffler. 22. The exhaust device according to claim 8, wherein the inner cylinder has a large-diameter portion for making contact with the inner surface of said outer cylinder at both ends thereof. 23. The exhaust device according to claim 8, further comprising a heat insulating cover fixed to the outer cylinder so as to cover the exhaust muffler and the front and rear end caps.
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