US4891940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffler cooling structure for liquid-cooled engine system
Assignee: Kawasaki Motors Ltd
•
Filing: 1987-11-17
•
Granted: 1990-01-09
•
Expires: 2007-11-17
Abstract
Abstract A liquid-cooled engine system comprising a liquid-cooled engine and a radiator which are arranged within an engine room. A duct is arranged within the engine room, for guiding air flow having passed through the radiator, to the outside of the engine room without exposure of the air flow to the engine. At least a part of the exhaust muffler connected to the engine is disposed within the duct so that the exhaust muffler is cooled by at least a part of the air flow guided by the duct. Preferably, the engine is a vertical type V-engine.
Inventors
- 👤 Shinichi Tamba
- 👤 Hitomi Miyake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:10
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/14; B; B60; B60K; B60K11/00; B60K13/00; B60K13/04; F01N3/00; F01N3/02; F01N3/05; F01P; F01P1/00; F01P1/06; F02; F02B; F02B75/00; F02B75/007; F02B75/16; F02B75/18; F02B75/22; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
139 words
A liquid-cooled engine system comprising: a liquid-cooled engine arranged within an engine housing; a radiator arranged within the engine housing, cooling liquid for said engine flowing through said radiator; means for generating air flow passing through said radiator to cause the air flow to cool the cooling liquid flowing through said radiator; duct means arranged within the engine housing, for guiding the air flow having passed through said radiator to the outside of the engine housing without exposure of the air flow to said engine; and an exhaust muffler located in the vicinity of the bottom of said engine and connected to said engine, at least a part of said exhaust muffler being disposed within said duct means so that said exhaust muffler is cooled by at least a part of the air flow guided by said duct means.
Claim 2
Dependent Claim
139 words
A liquid-cooled engine system comprising: a liquid-cooled engine arranged within an engine housing; a radiator arranged within the engine housing, cooling liquid for said engine flowing through said radiator; means for generating air flow passing through said radiator to cause the air flow to cool the cooling liquid flowing through said radiator; duct means arranged within the engine housing, for guiding the air flow having passed through said radiator to the outside of the engine housing without exposure of the air flow to said engine; and an exhaust muffler located in the vicinity of the bottom of said engine and connected to said engine, at least a part of said exhaust muffler being disposed within said duct means so that said exhaust muffler is cooled by at least a part of the air flow guided by said duct means.
Claim 3
Dependent Claim
38 words
A liquid-cooled engine system as defined in claim 1, wherein said duct means has an outlet end opening to the outside of the engine housing, said exhaust muffler being disposed at said outlet end of said duct means.
Claim 4
Dependent Claim
19 words
A liquid cooled engine system according to claim 1 wherein said exhaust muffler is located forward of said engine.
Claim 5
Dependent Claim
37 words
A liquid-cooled engine system as defined in claim 1, including exhaust pipe means through which said exhaust muffler is connected to said engine, at least a half of said exhaust pipe means extending within said duct means.
Claim 6
Dependent Claim
43 words
A liquid-cooled engine system as defined in claim 4, wherein said exhaust muffler is arranged horizontally, and said exhaust pipe means comprise a pair of exhaust pipes having substantially the same length, said exhaust pipes being connected in parallel to said exhaust muffler.
Claim 7
Dependent Claim
163 words
A liquid-cooled engine system comprising: a liquid-cooled vertical-type V-engine arranged within an engine housing room and having a vertically extending crankshaft; a radiator arranged within the engine housing and above said crankshaft, cooling liquid for the engine flowing through said radiator; means for generating air flow passing through said radiator to cause the air flow to cool the cooling liquid flowing through said radiator; duct means extending from a location above said engine to a location at a bottom of the engine room through a location in front of a V-bank of said engine, for guiding the air flow having passed through said radiator, to the outside of the engine housing without exposure of the air flow to said engine; and an exhaust muffler connected to said engine and disposed at an outlet end of said duct means which opens to the outside of the engine housing, so that said exhaust muffler is cooled by the air flow guided by said duct means.
Claim 8
Dependent Claim
163 words
A liquid-cooled engine system comprising: a liquid-cooled vertical-type V-engine arranged within an engine housing room and having a vertically extending crankshaft; a radiator arranged within the engine housing and above said crankshaft, cooling liquid for the engine flowing through said radiator; means for generating air flow passing through said radiator to cause the air flow to cool the cooling liquid flowing through said radiator; duct means extending from a location above said engine to a location at a bottom of the engine room through a location in front of a V-bank of said engine, for guiding the air flow having passed through said radiator, to the outside of the engine housing without exposure of the air flow to said engine; and an exhaust muffler connected to said engine and disposed at an outlet end of said duct means which opens to the outside of the engine housing, so that said exhaust muffler is cooled by the air flow guided by said duct means.
Claim 9
Dependent Claim
19 words
A liquid-cooled engine system as defined in claim 6, wherein said outlet end of said duct means opens downwardly.
Claim 10
Dependent Claim
37 words
A liquid-cooled engine system as defined in claim 6, including exhaust pipe means through which said exhaust muffler is connected to said engine, at least a half of said exhaust pipe means extending within said duct means.
Claim 11
Dependent Claim
43 words
A liquid-cooled engine system as defined in claim 8, wherein said exhaust muffler is arranged horizontally, and said exhaust pipe means comprise a pair of exhaust pipes having substantially the same length, said exhaust pipes being connected in parallel to said exhaust muffler.
Claim 12
Dependent Claim
153 words
A liquid-cooled engine system comprising: a liquid-cooled engine arranged within an engine housing; a radiator arranged within the engine housing, cooling liquid for said engine flowing through said radiator; means for generating air flow passing through said radiator to cause the air flow to cool the cooling liquid flowing through said radiator; duct means arranged within the engine housing and having an inlet portion located in the vicinity of the upper portion of said engine for guiding the air flow having passed through said radiator to the outside of the engine housing without exposure of the air flow to said engine; and an exhaust muffler connected to said engine and located below said inlet portion of said duct, at least a part of said exhaust muffler being disposed within said duct means so that said exhaust muffler is cooled by at least a part of the air flow guided by said duct means.
Claim 13
Dependent Claim
153 words
A liquid-cooled engine system comprising: a liquid-cooled engine arranged within an engine housing; a radiator arranged within the engine housing, cooling liquid for said engine flowing through said radiator; means for generating air flow passing through said radiator to cause the air flow to cool the cooling liquid flowing through said radiator; duct means arranged within the engine housing and having an inlet portion located in the vicinity of the upper portion of said engine for guiding the air flow having passed through said radiator to the outside of the engine housing without exposure of the air flow to said engine; and an exhaust muffler connected to said engine and located below said inlet portion of said duct, at least a part of said exhaust muffler being disposed within said duct means so that said exhaust muffler is cooled by at least a part of the air flow guided by said duct means.
Claim 14
Dependent Claim
38 words
A liquid-cooled engine system as defined in claim 10, wherein said duct means has an outlet end opening to the outside of the engine housing, said exhaust muffler being disposed at said outlet end of said duct means.
Claim 15
Dependent Claim
18 words
A liquid-cooled engine system according to claim 10, wherein said exhaust muffler is located forward of said engine.
Claim 16
Dependent Claim
37 words
A liquid-cooled engine system as defined in claim 10, including exhaust pipe means through which said exhaust muffler is connected to said engine, at least a half of said exhaust pipe means extending within said duct means.
Claim 17
Dependent Claim
43 words
A liquid-cooled engine system as defined in claim 13, wherein said exhaust muffler is arranged horizontally, and said exhaust pipe means comprises a pair of exhaust pipes having substantially the same length, said exhaust pipes being connected in parallel to said exhaust muffler.
Claim 18
Dependent Claim
151 words
A liquid-cooled engine system comprising: a liquid-cooled engine arranged within an engine housing, a radiator arranged within the engine housing, cooling liquid for said engine flowing through said radiator; means for generating air flow passing through said radiator to cause the air flow to cool the cooling liquid flowing through said radiator; duct means arranged within the engine housing, for guiding the air flow having passed through said radiator to the outside of the engine housing without exposure of the air flow to said engine, said duct means having an outlet end portion located at a lower forward region of said engine housing; and an exhaust muffler connected to said engine, at least a part of said exhaust muffler being disposed within said outlet end portion of said duct means so that said exhaust muffler is cooled by at least a part of the air flow guided by said duct means.
Claim 19
Dependent Claim
151 words
A liquid-cooled engine system comprising: a liquid-cooled engine arranged within an engine housing, a radiator arranged within the engine housing, cooling liquid for said engine flowing through said radiator; means for generating air flow passing through said radiator to cause the air flow to cool the cooling liquid flowing through said radiator; duct means arranged within the engine housing, for guiding the air flow having passed through said radiator to the outside of the engine housing without exposure of the air flow to said engine, said duct means having an outlet end portion located at a lower forward region of said engine housing; and an exhaust muffler connected to said engine, at least a part of said exhaust muffler being disposed within said outlet end portion of said duct means so that said exhaust muffler is cooled by at least a part of the air flow guided by said duct means.
Claim 20
Dependent Claim
22 words
A liquid-cooled engine system as defined in claim 15, wherein said outlet end portion opens to the outside of the engine housing.
Claim 21
Dependent Claim
18 words
A liquid-cooled engine system according to claim 15 wherein said exhaust muffler is located forward of said engine.
Claim 22
Dependent Claim
37 words
A liquid-cooled engine system as defined in claim 15, including exhaust pipe means through which said exhaust muffler is connected to said engine, at least a half of said exhaust pipe means extending within said duct means.
Claim 23
Dependent Claim
43 words
A liquid-cooled engine system as defined in claim 18, wherein said exhaust muffler is arranged horizontally, and said exhaust pipe means comprises a pair of exhaust pipes having substantially the same length, said exhaust pipes being connected in parallel to said exhaust muffler.
References Cited (Backward Citations)
US2078420A
Cited
US2177687A
Cited
US3413804A
Cited
US3859965A
Cited
US3827523A
Cited
US4060985A
Cited
US4535862A
Cited
US4265332A
Cited
US4371047A
Cited
US4503931A
Cited
US4610326A
Cited
US4633965A
Cited
US4590891A
Cited
JPS61136127A
Cited
GB2174652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |