US3759041A - Exhaust water separator for marine engines - Google Patents

Exhaust water separator for marine engines Download PDF

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Publication number
US3759041A
US3759041A US00218315A US3759041DA US3759041A US 3759041 A US3759041 A US 3759041A US 00218315 A US00218315 A US 00218315A US 3759041D A US3759041D A US 3759041DA US 3759041 A US3759041 A US 3759041A
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Prior art keywords
water
exhaust
improvement
engine
separator
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US00218315A
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I North
H Bankstahl
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Brunswick Corp
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Brunswick Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/12—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 specially adapted for submerged exhausting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/085—Other arrangements or adaptations of exhaust conduits having means preventing foreign matter from entering exhaust conduit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
    • F02B61/045—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for marine engines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/30—Exhaust treatment

Definitions

  • cooling water has been forced to completely follow the path of the engine exhaust.
  • pressure relief holes have been provided to allow early escape of the water and exhaust mixture.
  • the present invention provides means for removing and expelling a substantial portion of the water from the exhaust system which is effective at any speed.
  • an arcuate exhaust elbow which causes the water to be thrown to the outside of the elbow by centrifugal force.
  • a water separator is provided at the end of the arcuate elbow which removes and expels the water flowing along the outside of the elbow.
  • FIG. 1 is a perspective exploded view of the propulsion system of this invention with parts in section.
  • FIG. 2 is an enlarged elevation of the water separator.
  • FIG. 3 is a section view along lines 3-3 of FIG. 2.
  • FIG. 4 is an enlarged section view generally along lines 4-4 of FIG. 1.
  • a marine internal combustion engine having exhaust manifolds 11 and manifold elbows 12.
  • the engine is carried in a boat, the transom of which is indicated by 14.
  • An outboard drive unit 15 is also carried by the boat transom l4 and is drivingly connected in a conventional manner to the engine 10.
  • Two exhaust elbows 16 are provided, each being attached to the respective manifold elbow 12.
  • the exhaust elbows 16 are arcuate in shape and are attached at one of their ends by a water separator 18. interposed between the end of each exhaust elbow l6 and the water separator 18 is a flapper valve 20 which serves to prevent back flow of water through the exhaust system.
  • the water separator 18 includesexhaust inlet passages 21, an exhaust outlet passage 22, and water outlet passages 23.
  • the rear face 34 of the water separator 18 is connected in a conventional manner to the front face 35 of the bottom portion of the gimbal housing 36 such that water passage 23 in the water separator 18 align with water passages 38 in the gimbal housing 36.
  • Water passages 38 are in turn connected to a water outlet 39 which expels the water back into the lake.
  • Passage means for passing exhaust gases from the engine to an exhaust outlet are provided which are formed through the elbows 16, valve 20, separator 18, bellows 26, drive unit 15, and propeller 28.
  • the direction of travel of the exhaust is indicated by arrows 25.
  • Exhaust flows from the'engine into the manifold 11, through the manifold elbows 12, the exhaust elbows 16, the flapper valves 20, the exhaust inlet passages 21, the exhaust outlet passage 22, the exhaust bellows 26, internal exhaust passages (not shown), in the outboard drive unit 15, through the propeller 28, and out the exhaust outlet 29 in the propeller 28.
  • Water is dumped from the engine block through hoses 30 into cooling passages (not shown) in the exhaust manifolds.
  • the cooling water is then mixed with the exhaust at or near the outlet 32 of the manifold elbows 12 in general accordance with the description in US. Pat. No. 3,541,786 entitled Inboard Marine Engine Cooling System.
  • the exhaust is sufficiently cooled by the water to prevent damage to the flexible material of the exhaust elbows 12, the flapper valve 20, the exhaust bellows 26, and the flexible hub of the propeller 28.
  • arcuately formed exhaust elbows 16 which result in the water being forced by centrifugal action to the outside wall of the elbows 16.
  • the water which is forced to the outside of the exhaust elbows 16 is collected at the bottom of the water separator 18 by the combined effects of centrifugal action and gravity.
  • the water meets a raised wall portion 41 in the water separator 18 and is forced through water passage 23 into water passages 38 and expelled through water outlets 39.
  • the water separator 18 includes a pair of arcuate internal walls 43 to aid in turning the exahust at right angles and promote smooth flow of the exhaust gases.
  • a water separator in the passage means downstream from the injecting means and upstream from the exhaust outlet, said separator including a water passage means in communication with the exhaust passage means in an area of primarily water flow for separating and expelling a substantial portion of the water from the passage means without substantially interfering with exhaust flow, said separator being operable without regard to engine speed.
  • arcuate member is generally vertically disposed and connected to the engine at the top such that water is forced to the outside of said member by the additional affects of gravity.
  • passage means are formed in part by an arcuate exhaust elbow connected at one end to said engine such that water is forced to the outside of said elbow by centrifugal action and said separator is connected to the other end of said elbow, said water passage means being positioned to pick up and expel the water flowing on the outside of said elbow.
  • arcuate member is generally vertically disposed and connected to the engine at the top such that water is forced to the outside of said member by the additional affects of gravity.
  • arcuate member is generally vertically disposed and connected to the engine at the top such that water is forced to the outside of said member by the additional affects of gravity.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

A water separator for a marine propulsion system. Arcuate exhaust elbows are provided which force cooling water in the exhaust to the outside by centrifugal action. This water is removed and expelled through the transom.

Description

United States Patent [1 1 North et al.
[ Sept. 18, 1973 EXHAUST WATER SEPARATOR FOR MARINE ENGINES [75] Inventors: Irving W. North, Oshkosh; Herbert A. Bankstahl, Fond du Lac, both of Wis.
[73] Assignee: Brunswick Corporation, Chicago, 111.
[22] Filed: Jan. 17, 1972 [21] Appl. No.: 218,315
[52] U.S. Cl 60/310, 60/311, 55/D1G. 30 [51] Int. Cl. F0ln 3/02 [58] Field of Search 60/310, 311;
[56] References Cited UNITED STATES PATENTS 2,763,982 9/1956 Dega 60/310 3,263,413 8/1966 Vactor 60/310 3,495,385 2/1970 G1ass 60/310 3,541,786 11/1970 Sarra 60/310 Primary Examiner-Douglas Hart Attorney-Roy T. Montgomery [57] ABSTRACT A water separator for a marine propulsion system. Arcuate exhaust elbows are provided which force cooling water in the exhaust to the outside by centrifugal action. This water is removed and expelled through the transom.
10 Claims, 4 Drawing Figures Patented Sept. 18, 1973 4 7. I'll 1 wwmw wv/ Vlwllllljldw/lv V EXHAUST WATER SEPARATOR FOR MARINE ENGINES BACKGROUND OF THE INVENTION This invention relates to a cooling system for a marine propulsion system wherein cooling water is discharged into the exhaust.
In constructions heretofore employed, cooling water has been forced to completely follow the path of the engine exhaust. In an effort to relive the resultant back pressure on the engine, pressure relief holes have been provided to allow early escape of the water and exhaust mixture.
' It has been found that the flow characteristics of the exhaust may vary between systems and at different speeds of a single system. As a result, often primarily exhaust gases escape through the pressure relief holes and effectiveness in relieving back pressure is reduced.
SUMMARY OF THE INVENTION The present invention provides means for removing and expelling a substantial portion of the water from the exhaust system which is effective at any speed. There is provided an arcuate exhaust elbow which causes the water to be thrown to the outside of the elbow by centrifugal force. A water separator is provided at the end of the arcuate elbow which removes and expels the water flowing along the outside of the elbow. Thus, it is assured that the majority of the water is removed and not forced through the outboard drive unit.
BRIEF DESCRIPTION OF THE DRAWING The accompanying drawing illustrates the best mode presently contemplated for carrying out the invention.
In the drawing:
FIG. 1 is a perspective exploded view of the propulsion system of this invention with parts in section.
FIG. 2 is an enlarged elevation of the water separator.
FIG. 3 is a section view along lines 3-3 of FIG. 2.
FIG. 4 is an enlarged section view generally along lines 4-4 of FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings, there is shown a marine internal combustion engine having exhaust manifolds 11 and manifold elbows 12. The engine is carried in a boat, the transom of which is indicated by 14. An outboard drive unit 15 is also carried by the boat transom l4 and is drivingly connected in a conventional manner to the engine 10. Two exhaust elbows 16 are provided, each being attached to the respective manifold elbow 12. The exhaust elbows 16 are arcuate in shape and are attached at one of their ends by a water separator 18. interposed between the end of each exhaust elbow l6 and the water separator 18 is a flapper valve 20 which serves to prevent back flow of water through the exhaust system.
The water separator 18 includesexhaust inlet passages 21, an exhaust outlet passage 22, and water outlet passages 23. The rear face 34 of the water separator 18 is connected in a conventional manner to the front face 35 of the bottom portion of the gimbal housing 36 such that water passage 23 in the water separator 18 align with water passages 38 in the gimbal housing 36. Water passages 38 are in turn connected to a water outlet 39 which expels the water back into the lake.
Passage means for passing exhaust gases from the engine to an exhaust outlet are provided which are formed through the elbows 16, valve 20, separator 18, bellows 26, drive unit 15, and propeller 28. The direction of travel of the exhaust is indicated by arrows 25. Exhaust flows from the'engine into the manifold 11, through the manifold elbows 12, the exhaust elbows 16, the flapper valves 20, the exhaust inlet passages 21, the exhaust outlet passage 22, the exhaust bellows 26, internal exhaust passages (not shown), in the outboard drive unit 15, through the propeller 28, and out the exhaust outlet 29 in the propeller 28.
Water is dumped from the engine block through hoses 30 into cooling passages (not shown) in the exhaust manifolds. The cooling water is then mixed with the exhaust at or near the outlet 32 of the manifold elbows 12 in general accordance with the description in US. Pat. No. 3,541,786 entitled Inboard Marine Engine Cooling System. The exhaust is sufficiently cooled by the water to prevent damage to the flexible material of the exhaust elbows 12, the flapper valve 20, the exhaust bellows 26, and the flexible hub of the propeller 28.
However, it has been found that forcing the water and exhaust gas mixture through the rather tortuous path of the exhaust bellows 26, the exhaust passages in the outboard drive unit 15, and the hub of the propeller 28 creates undesirable back pressure on the exhaust of engine 10. Thus, it is desirable to remove as much of the water as possible prior to the bellows 26 and the outboard drive unit 15. It has been found that the mere provision of an exhaust relief outlet is not completely satisfactory to accomplish this purpose, since at some engine speeds the water may flow through the exhaust passage means in an area away from the exahust relief. This-results in primarily exhaust escaping through the relif and is not as effective for relieving back pressure.
In the present invention there are provided arcuately formed exhaust elbows 16 which result in the water being forced by centrifugal action to the outside wall of the elbows 16. The water which is forced to the outside of the exhaust elbows 16 is collected at the bottom of the water separator 18 by the combined effects of centrifugal action and gravity. The water meets a raised wall portion 41 in the water separator 18 and is forced through water passage 23 into water passages 38 and expelled through water outlets 39.
The water separator 18 includes a pair of arcuate internal walls 43 to aid in turning the exahust at right angles and promote smooth flow of the exhaust gases.
It is apparent that many modifications and variations of the invention as hereinbefore set forth may be made without departing from the scope and spirit hereof.
What is claimed is:
I. In a marine device having a water cooled internal combustion engine, passage means for passing exhaust from the engine to an exhaust outlet, and means for injecting cooling water from the engine into the exhaust passage means, the improvement comprising a water separator in the passage means downstream from the injecting means and upstream from the exhaust outlet, said separator including a water passage means in communication with the exhaust passage means in an area of primarily water flow for separating and expelling a substantial portion of the water from the passage means without substantially interfering with exhaust flow, said separator being operable without regard to engine speed.
2. The improvement of claim 1, wherein said separator includes a raised wall portion to aid in water separation.
3. The improvement of claim 1, including an arcuate member which forms part of the exhuast passage means such that the water is forced to the outside of said member by centrifugal action, said member being upstream from and connected to said water separator 4. The improvement of claim 3, wherein said separator includes a raised wall portion to aid in water separation. a
5. The improvement of claim 3, wherein said arcuate member is generally vertically disposed and connected to the engine at the top such that water is forced to the outside of said member by the additional affects of gravity.
' 6. The improvement of claim 1, wherein said passage means are formed in part by an arcuate exhaust elbow connected at one end to said engine such that water is forced to the outside of said elbow by centrifugal action and said separator is connected to the other end of said elbow, said water passage means being positioned to pick up and expel the water flowing on the outside of said elbow.
7. The improvement of claim 6, wherein said separator includes a raised wall portion to aid in water separation.
8. The improvement of claim 6, wherein said arcuate member is generally vertically disposed and connected to the engine at the top such that water is forced to the outside of said member by the additional affects of gravity.
9. The improvement of claim 3, wherein said arcuate member is generally vertically disposed and connected to the engine at the top such that water is forced to the outside of said member by the additional affects of gravity.
10. The improvement of claim 9, wherein said separator includes a raised wall portion to aid in water separation.

Claims (10)

1. In a marine device having a water cooled internal combustion engine, passage means for passing exhaust from the engine to an exhaust outlet, and means for injecting cooling water from the engine into the exhaust passage means, the improvement comprising a water separator in the passage means downstream from the injecting means and upstream from the exhaust outlet, said separator including a water passage means in communication with the exhaust passage means in an area of primarily water flow for separating and expelling a substantial portion of the water from the passage means without substantially interfering with exhaust flow, said separator being operable without regard to engine speed.
2. The improvement of claim 1, wherein said separator includes a raised wall portion to aid in water separation.
3. The improvement of claim 1, including an arcuate member which forms part of the exhuast passage means such that the water is forced to the outside of said member by centrifugal action, said member being upstream from and connected to said water separator.
4. The improvement of claim 3, wherein said separator includes a raised wall portion to aid in water separation.
5. The improvement of claim 3, wherein said arcuate member is generally vertically disposed and connected to the engine at the top such that water is forced to the outside of saiD member by the additional affects of gravity.
6. The improvement of claim 1, wherein said passage means are formed in part by an arcuate exhaust elbow connected at one end to said engine such that water is forced to the outside of said elbow by centrifugal action and said separator is connected to the other end of said elbow, said water passage means being positioned to pick up and expel the water flowing on the outside of said elbow.
7. The improvement of claim 6, wherein said separator includes a raised wall portion to aid in water separation.
8. The improvement of claim 6, wherein said arcuate member is generally vertically disposed and connected to the engine at the top such that water is forced to the outside of said member by the additional affects of gravity.
9. The improvement of claim 3, wherein said arcuate member is generally vertically disposed and connected to the engine at the top such that water is forced to the outside of said member by the additional affects of gravity.
10. The improvement of claim 9, wherein said separator includes a raised wall portion to aid in water separation.
US00218315A 1972-01-17 1972-01-17 Exhaust water separator for marine engines Expired - Lifetime US3759041A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3542557A1 (en) * 1985-05-06 1986-11-06 Outboard Marine Corp., Waukegan, Ill. SHIP DRIVE DEVICE
US4687450A (en) * 1985-05-06 1987-08-18 Bland Gerald F Marine propulsion device exhaust system
US4734071A (en) * 1987-04-13 1988-03-29 Brunswick Corporation Marine engine exhaust assembly
US4795383A (en) * 1987-06-04 1989-01-03 Outboard Marine Corporation Marine propulsion device low-speed exhaust system
US4831822A (en) * 1987-06-10 1989-05-23 Sanshin Kogyo Kabushiki Kaisha Exhaust system for marine engine
JPH01204894A (en) * 1987-12-23 1989-08-17 Outboard Marine Corp Exhaust system for marine propeller
US5032095A (en) * 1988-09-23 1991-07-16 Outboard Marine Corporation Marine engine with galvanic circuit protection
US5746630A (en) * 1995-08-31 1998-05-05 Centek Industries, Inc. Combination wet marine exhaust muffler and water separator
US6077137A (en) * 1999-01-08 2000-06-20 Volvo Penta Of The Americas, Inc. Anti ingestion device
US6226984B1 (en) 1997-08-08 2001-05-08 Centek Industries, Inc. Marine wet exhaust system
US6290558B1 (en) 2000-06-27 2001-09-18 Brunswick Corporation Exhaust elbow with a water trap for a marine propulsion system
EP1176293A2 (en) 2000-07-24 2002-01-30 Centek Industries Inc. Marine wet exhaust system
US6820419B2 (en) 2000-12-21 2004-11-23 Centek Industries, Inc. Marine wet exhaust system
US20090241515A1 (en) * 2008-03-26 2009-10-01 Denso International America, Inc. Exhaust condensation separator
US7699675B1 (en) 2009-01-20 2010-04-20 Brunswick Corporation Marine exhaust elbow with condensation reducing water circulation system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504238A (en) * 1982-12-23 1985-03-12 Brunswick Corporation Fluid cooler for marine drives
US5083952A (en) * 1989-05-12 1992-01-28 Outboard Marine Corporation Marine propulsion device exhaust system
AU2519592A (en) * 1991-09-05 1993-04-05 K.F. Industri A/S Method and system for cooling of an internal combustion engine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2763982A (en) * 1952-01-29 1956-09-25 Gen Motors Corp Centrifugal apparatus for treating exhaust gas
US3263413A (en) * 1965-08-10 1966-08-02 Nat Mine Service Co System for controlling a diesel engine to provide safe operation in an explosive atmosphere
US3495385A (en) * 1967-08-21 1970-02-17 Adolph C Glass Air pollution control device
US3541786A (en) * 1969-04-04 1970-11-24 Brunswick Corp Inboard marine engine cooling system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2763982A (en) * 1952-01-29 1956-09-25 Gen Motors Corp Centrifugal apparatus for treating exhaust gas
US3263413A (en) * 1965-08-10 1966-08-02 Nat Mine Service Co System for controlling a diesel engine to provide safe operation in an explosive atmosphere
US3495385A (en) * 1967-08-21 1970-02-17 Adolph C Glass Air pollution control device
US3541786A (en) * 1969-04-04 1970-11-24 Brunswick Corp Inboard marine engine cooling system

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3542557A1 (en) * 1985-05-06 1986-11-06 Outboard Marine Corp., Waukegan, Ill. SHIP DRIVE DEVICE
GB2174659A (en) * 1985-05-06 1986-11-12 Outboard Marine Corp Marine propulsion device exhaust system
US4687450A (en) * 1985-05-06 1987-08-18 Bland Gerald F Marine propulsion device exhaust system
GB2174659B (en) * 1985-05-06 1989-06-28 Outboard Marine Corp Marine propulsion device exhaust system
US4734071A (en) * 1987-04-13 1988-03-29 Brunswick Corporation Marine engine exhaust assembly
WO1988008072A1 (en) * 1987-04-13 1988-10-20 Brunswick Corporation Marine engine exhaust assembly
US4795383A (en) * 1987-06-04 1989-01-03 Outboard Marine Corporation Marine propulsion device low-speed exhaust system
US4831822A (en) * 1987-06-10 1989-05-23 Sanshin Kogyo Kabushiki Kaisha Exhaust system for marine engine
JPH01204894A (en) * 1987-12-23 1989-08-17 Outboard Marine Corp Exhaust system for marine propeller
US4861296A (en) * 1987-12-23 1989-08-29 Outboard Marine Corporation Marine propulsion device exhaust system
US5032095A (en) * 1988-09-23 1991-07-16 Outboard Marine Corporation Marine engine with galvanic circuit protection
US5746630A (en) * 1995-08-31 1998-05-05 Centek Industries, Inc. Combination wet marine exhaust muffler and water separator
US6226984B1 (en) 1997-08-08 2001-05-08 Centek Industries, Inc. Marine wet exhaust system
US6077137A (en) * 1999-01-08 2000-06-20 Volvo Penta Of The Americas, Inc. Anti ingestion device
WO2000040463A1 (en) * 1999-01-08 2000-07-13 Volvo Penta Of The Americas, Inc. Anti ingestion device
US6290558B1 (en) 2000-06-27 2001-09-18 Brunswick Corporation Exhaust elbow with a water trap for a marine propulsion system
EP1176293A2 (en) 2000-07-24 2002-01-30 Centek Industries Inc. Marine wet exhaust system
US6820419B2 (en) 2000-12-21 2004-11-23 Centek Industries, Inc. Marine wet exhaust system
US20090241515A1 (en) * 2008-03-26 2009-10-01 Denso International America, Inc. Exhaust condensation separator
US7699675B1 (en) 2009-01-20 2010-04-20 Brunswick Corporation Marine exhaust elbow with condensation reducing water circulation system

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BE788163A (en) 1972-12-18
CA961709A (en) 1975-01-28
GB1410489A (en) 1975-10-15

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