[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

US3642092A - Noiseless soft-running power plant - Google Patents

Noiseless soft-running power plant Download PDF

Info

Publication number
US3642092A
US3642092A US782658A US3642092DA US3642092A US 3642092 A US3642092 A US 3642092A US 782658 A US782658 A US 782658A US 3642092D A US3642092D A US 3642092DA US 3642092 A US3642092 A US 3642092A
Authority
US
United States
Prior art keywords
air
casing
labyrinth
power unit
passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US782658A
Inventor
Jerzy Henryk Cederbaum
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3642092A publication Critical patent/US3642092A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00Component parts, details or accessories, not otherwise provided for
    • F02B77/11Thermal or acoustic insulation
    • F02B77/13Acoustic insulation

Definitions

  • ABSTRACT In a soft-running power plant with a power unit enclosed by a casing forming a sound-absorbing chamber with walls having an outlet for consumed air and an inlet for cooling air and combustion air as well as a number of labyrinth forming passages, there are so arranged that the cooling air is caused to travel along the power unit and is passed through a labyrinth passage in the wall opposite the inlet, thus forming an outlet 2,881,860 4/1959 T611168 1 81/334 for heated air, 2,701,024 2/1955 Thomas ..181/33.4
  • the sound level obtained with a unit of above type is so low that the sound range is only a quarter or a fifth of that experienced with sound dampened power units constructed according to the wall insulation principle.
  • a person of average hearing will hardly hear the first-mentioned unit at a distance of more than about 35 meters, whereas the power unit employing wall insulation methods can be heard at a distance of about 200 meters.
  • the present invention is concerned with an improved power unit of the first-mentioned type, whereby such a unit can be made readily accessible for supervising and servicing purposes and whereby still greater power can be taken out of the machine without causing unpermitted increases in temperature or sound level.
  • the present invention is mainly characterized in that the labyrinth-forming passage or passages for the cold air intake and for the combustion air intake of the power unit are so arranged in relation to the power unit that cold cooling air taken in through the labyrinth passage forming the air intake is forced to pass along and in contact with the unit, suitably in its longitudinal direction. Furthermore, cold cooling air is passed out through a labyrinth passage forming an outlet for the hot wire and arranged in the opposing wall.
  • the labyrinth passage which forms the inlet is suitably arranged at one end of the space occupied by the unit.
  • the labyrinth passage which forms the outlet and a suction fan cooperating with the intake of said passage and an optional engine cooling means are arranged at the opposite end of said space.
  • the labyrinth is formed by wall elements which may be withdrawn or inserted either up or down or laterally and by flaps or cover means.
  • the wall elements, flaps and cover means may be mounted on vertical or horizontal shafts.
  • FIG. -1 is a perspective view of one embodiment of the invention.
  • FIGS. 2a and 2b are two perspective views of another embodiment of the invention.
  • FIG. 1 comprises a soft-running or noiseless" power plant in the form of an electric power plant 1 supported in a framework or on a base 2 and enclosed in a sound insulating casing.
  • the power plant consists of an internal combustion engine 3 having an air intake and an exhaust pipe 4.
  • the power unit is assumed to be water cooled, although air is passed by means of a fan 6 through a radiator (not shown) at the left-hand wall of the sound-insulating casing, as seen in the drawing.
  • the internal combustion engine member 3 drives a generator 5.
  • the sound absorbing casing enclosing the unit is formed of four wall elements 7, 8, 9 and 10 which form labyrinth passages and which are vertically suspended at their outer edges'by hinges 11 from a U-shaped tubular beam of rectangular-cross section, of which only the two limb members can be seen in FIG.. 1.
  • Each of the four wall elements 7-10 comprises three single wall members 7', 7" and 7"; 8, 8" and 8" ,9, 9f and 9"; and l, l0" and 10" respectively, constructively built together one inside the other. In this way each of the four wall elements can be swung out, as shown by the dashed lines in FIG. 1 in the case of member 7'.
  • Each wall member forms a labyrinth passage, which comprises an integral part of a passage system through which the necessary cooling air and air of combustion is passed to the power unit 1 and through which the heated cooling air is lead away.
  • the passage of the air through the system is shown in FIG. 1 by arrow 13.
  • the inlet passage is divided into a passage 14, the direction of flow being marked by four arrows, and a passage 15, which is partially hidden by the sectional view of a cover plate 16.
  • the flow direction in passage 15 is shown by arrows 17 and 18.
  • the air enters at 13 branches into the two passages 14 and 15 and enters the engine chamber where it travels along the unit 1 in the direction of arrow 19.
  • the flow of air is maintained by the fan 6, whichvpasses the cooling air, now heated by the engine, through the radiator behind end wall 22 of the casing.
  • the air is once again divided, part of said air flowing through the passage 23 and part through passage 24, as shown by the arrows.
  • the heated cooling air leaves as shown by arrows 26 and 27 via the outlet 25, which is sealed against the unit space.
  • the unit according to the invention may be mounted on the chassis of a vehicle.
  • the power unit comprises a compressor 28 which is driven by an internal combustion engine 29.
  • the power unit is positioned in a sound-insulating tray 30, which in turn is mounted on two wheels 31.
  • the air inlet and outlet soundinsulating labyrinth forming passages are arranged in the lid of tray 30, in the form of a cover member 32.
  • the cover member 32 can be swung back to the position shown in FIG. 2b on bearings 35, 36 arranged in brackets 33, 34 positioned outside one side edge of said cover.
  • the cover can either by swung back by means of a jack (not shown) or by means of some suitable pneumatic arrangement.
  • cover member 32 The construction of cover member 32 and the arrangement of the air passages in the wall elements of said cover can best be seen from FIG. 2a, in which the cover member is shown in section.
  • the unit intake for cooling air and air for combustion is in the form of a recess 37 which forms a gap when the cover 32 is closed and through which air enters, as indicated by arrows 38 and 39.
  • the air thus enters passage 40 and is divided through openings 41 and 42 in the inner wall member of the cover member into a stream of air, indicated by arrow 43, for cooling the compressor unit 28 and serving as intake air for the same.
  • the air in passage 40 is divided into two further streams of air 45, for cooling the engine 29, and 46 for supplying for combustion to said engine.
  • an opening 47 Arranged in inner wall member on the opposite side of the cover member is an opening 47, through which the heated cooling air exits the unit into a cover passage 48, where it is divided into one stream passing to the left in the direction of arrows 49 and 50 and one stream to the right in the direction of arrows 51 and 52 towards the end walls of the cover member 32.
  • outlets 53 and 54 for the heated cooling air Arranged in each end wall are outlets 53 and 54 for the heated cooling air, as shown by arrows 55 and 56 and 57 and 58, respectively. As in the case of the embodiment of FIG. 1, the outlets 57 and 58 for the heated cooling air are sealed against the unit space.
  • a sound wave propagated through passage 40 is subjected to two or three directional changes, while a similar wave propagated through passage 48 is subjected to three to four directional changes.
  • the tray 30 is provided with a tow bar 59.
  • a soft-running power plant including a power unit enclosed by easing means for forming a sound-absorbing chamber for the power unit, said casing means comprising wall means wherein said wall means form:
  • labyrinth passage means for carrying sound waves generated by said power unit, said passage means changing directions a plurality of times, wherein said direction change is 180 in at least one of said plurality of direction changes, and thereby dissipating the energy in said sound waves;
  • said labyrinth passage means coupled to said inlet means whereby the air entering the casing through said inlet means passes through said labyrinth means in the longitudinal direction;
  • said labyrinth passage means coupled to said outlet means whereby the air exhausting from said casing through said outlet means passes through said labyrinth means;

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

In a soft-running power plant with a power unit enclosed by a casing forming a sound-absorbing chamber with walls having an outlet for consumed air and an inlet for cooling air and combustion air as well as a number of labyrinth forming passages, there are so arranged that the cooling air is caused to travel along the power unit and is passed through a labyrinth passage in the wall opposite the inlet, thus forming an outlet for heated air.

Description

United States Patent Cederbaurn [54] NOISELESS SOFT-RUNNING POWER PLANT [72] Inventor: Jerzy Henryk Cederbaum, Timragatan 41,
Vallingby, Sweden [22] Filed: Dec. 10, 1968 [21] Appl. No.: 782,658
[56] References Cited UNITED STATES PATENTS 1,962,441 6/1934 Haddock ..181/33.4
[ 1 Feb. 15, 1972 Primary ExaminerRobert S. Ward, .Ir. Attorney-Sughrue, Rothwell, Mion, Zinn & Macpeak [57] ABSTRACT In a soft-running power plant with a power unit enclosed by a casing forming a sound-absorbing chamber with walls having an outlet for consumed air and an inlet for cooling air and combustion air as well as a number of labyrinth forming passages, there are so arranged that the cooling air is caused to travel along the power unit and is passed through a labyrinth passage in the wall opposite the inlet, thus forming an outlet 2,881,860 4/1959 T611168 1 81/334 for heated air, 2,701,024 2/1955 Thomas ..181/33.4
- 2Claims,3DrawingFgures FOREIGN PATENTS OR APPLICATIONS 761,751 6/1967 Canada ..l8l/33.4
h a ..v I
14 27 k I [r 7 I M "n r/ 9 S m, ,l nmm nm I 1'; I 1/. 7/
\ lln. ML
PATENTEBFEBIS m2 3.642.092
' SHEET 1 [IF 3 PATENTEDFEB 15 p912 SHEET 2 BF 3 NOISELESS SOFT-RUNNING POWER PLANT Electric units which are enclosed in casings adapted to form a sound-absorbing chamber or a sound suppressor for the unit are known to the art, the walls of the chamber at the same time'forming at least one outlet for consumed air (exhaust gases, cooling air, etc.) and possibly also an air inlet for cooling air and for combustion air for the units. The casing is formed by two walls, an inner and an outer, arranged to provide a number of labyrinth-forming passages for the outgoing sound waves, which are to lose their sound effect as a result of the numerous changes in direction experienced in the labyrinth. The passage or passages forming the labyrinth are also arranged to enclose the power unit on two or more sides thereof.
The sound level obtained with a unit of above type is so low that the sound range is only a quarter or a fifth of that experienced with sound dampened power units constructed according to the wall insulation principle. Thus, a person of average hearing will hardly hear the first-mentioned unit at a distance of more than about 35 meters, whereas the power unit employing wall insulation methods can be heard at a distance of about 200 meters.
The present invention is concerned with an improved power unit of the first-mentioned type, whereby such a unit can be made readily accessible for supervising and servicing purposes and whereby still greater power can be taken out of the machine without causing unpermitted increases in temperature or sound level.
The present invention is mainly characterized in that the labyrinth-forming passage or passages for the cold air intake and for the combustion air intake of the power unit are so arranged in relation to the power unit that cold cooling air taken in through the labyrinth passage forming the air intake is forced to pass along and in contact with the unit, suitably in its longitudinal direction. Furthermore, cold cooling air is passed out through a labyrinth passage forming an outlet for the hot wire and arranged in the opposing wall. The labyrinth passage which forms the inlet is suitably arranged at one end of the space occupied by the unit. The labyrinth passage which forms the outlet and a suction fan cooperating with the intake of said passage and an optional engine cooling means are arranged at the opposite end of said space. In one embodiment of the invention the labyrinth is formed by wall elements which may be withdrawn or inserted either up or down or laterally and by flaps or cover means. The wall elements, flaps and cover means may be mounted on vertical or horizontal shafts.
The invention will now be described in detail, with reference to the accompanying drawings, in which FIG. -1 is a perspective view of one embodiment of the invention, and
FIGS. 2a and 2b are two perspective views of another embodiment of the invention.
The embodiment shown in FIG. 1 comprises a soft-running or noiseless" power plant in the form of an electric power plant 1 supported in a framework or on a base 2 and enclosed in a sound insulating casing. The power plant consists of an internal combustion engine 3 having an air intake and an exhaust pipe 4. In the illustrative example the power unit is assumed to be water cooled, although air is passed by means of a fan 6 through a radiator (not shown) at the left-hand wall of the sound-insulating casing, as seen in the drawing. The internal combustion engine member 3 drives a generator 5. The sound absorbing casing enclosing the unit is formed of four wall elements 7, 8, 9 and 10 which form labyrinth passages and which are vertically suspended at their outer edges'by hinges 11 from a U-shaped tubular beam of rectangular-cross section, of which only the two limb members can be seen in FIG.. 1. Each of the four wall elements 7-10 comprises three single wall members 7', 7" and 7"; 8, 8" and 8" ,9, 9f and 9"; and l, l0" and 10" respectively, constructively built together one inside the other. In this way each of the four wall elements can be swung out, as shown by the dashed lines in FIG. 1 in the case of member 7'. This renders the wall members easily accessible for inspection purposes, as well as affording access to the power unit for supervision and servicing. Each wall member forms a labyrinth passage, which comprises an integral part of a passage system through which the necessary cooling air and air of combustion is passed to the power unit 1 and through which the heated cooling air is lead away. The passage of the air through the system is shown in FIG. 1 by arrow 13. At this point the inlet passage is divided into a passage 14, the direction of flow being marked by four arrows, and a passage 15, which is partially hidden by the sectional view of a cover plate 16. The flow direction in passage 15 is shown by arrows 17 and 18. Thus, the air enters at 13, branches into the two passages 14 and 15 and enters the engine chamber where it travels along the unit 1 in the direction of arrow 19. As indicated by arrows 20, 21, the flow of air is maintained by the fan 6, whichvpasses the cooling air, now heated by the engine, through the radiator behind end wall 22 of the casing. At this point the air is once again divided, part of said air flowing through the passage 23 and part through passage 24, as shown by the arrows. The heated cooling air leaves as shown by arrows 26 and 27 via the outlet 25, which is sealed against the unit space.
As will be evident from FIG. 1, a sound wave propagated through any of passages 14, 15, 23 or 24 is forced to un-- dertake five to six changes in direction, and is thereby appreciably dampened.
Similarly to other arrangements of this nature, the unit according to the invention may be mounted on the chassis of a vehicle.
In the embodiment shown in FIGS. 2a and 2b the power unit comprises a compressor 28 which is driven by an internal combustion engine 29. The power unit is positioned in a sound-insulating tray 30, which in turn is mounted on two wheels 31. In this embodiment, the air inlet and outlet soundinsulating labyrinth forming passages are arranged in the lid of tray 30, in the form of a cover member 32. The cover member 32 can be swung back to the position shown in FIG. 2b on bearings 35, 36 arranged in brackets 33, 34 positioned outside one side edge of said cover. The cover can either by swung back by means of a jack (not shown) or by means of some suitable pneumatic arrangement.
The construction of cover member 32 and the arrangement of the air passages in the wall elements of said cover can best be seen from FIG. 2a, in which the cover member is shown in section. The unit intake for cooling air and air for combustion is in the form of a recess 37 which forms a gap when the cover 32 is closed and through which air enters, as indicated by arrows 38 and 39. The air thus enters passage 40 and is divided through openings 41 and 42 in the inner wall member of the cover member into a stream of air, indicated by arrow 43, for cooling the compressor unit 28 and serving as intake air for the same. The air in passage 40 is divided into two further streams of air 45, for cooling the engine 29, and 46 for supplying for combustion to said engine. Arranged in inner wall member on the opposite side of the cover member is an opening 47, through which the heated cooling air exits the unit into a cover passage 48, where it is divided into one stream passing to the left in the direction of arrows 49 and 50 and one stream to the right in the direction of arrows 51 and 52 towards the end walls of the cover member 32. Arranged in each end wall are outlets 53 and 54 for the heated cooling air, as shown by arrows 55 and 56 and 57 and 58, respectively. As in the case of the embodiment of FIG. 1, the outlets 57 and 58 for the heated cooling air are sealed against the unit space.
As will be evident from FIGS. 20 and 2b, a sound wave propagated through passage 40 is subjected to two or three directional changes, while a similar wave propagated through passage 48 is subjected to three to four directional changes.
To enable the power unit to be towed behind a vehicle the tray 30 is provided with a tow bar 59.
Although the invention has been described with reference to the described and illustrated embodiments it can, however, be varied within the scope of the following claims.
What I claim is:
1. A soft-running power plant including a power unit enclosed by easing means for forming a sound-absorbing chamber for the power unit, said casing means comprising wall means wherein said wall means form:
afinlet means for permitting air for cooling and combustion to enter said casing;
b. outlet means for permitting consumed air to exhaust from said casing;
c. labyrinth passage means for carrying sound waves generated by said power unit, said passage means changing directions a plurality of times, wherein said direction change is 180 in at least one of said plurality of direction changes, and thereby dissipating the energy in said sound waves;
d. said labyrinth passage means coupled to said inlet means whereby the air entering the casing through said inlet means passes through said labyrinth means in the longitudinal direction;
e. said labyrinth passage means coupled to said outlet means whereby the air exhausting from said casing through said outlet means passes through said labyrinth means; and
f. wherein a plurality of said wall means are rotatably mounted for rotating independent portions of said wall means about vertical shafts away from said power unit whereby easy access may be gained to said power unit.
2. The power plant of claim 1 wherein said passage means are sealed from the exterior of the power plant.

Claims (2)

1. A soft-running power plant including a power unit enclosed by casing means for forming a sound-absorbing chamber for the power unit, said casing means comprising wall means wherein said wall means form: a. inlet means for permitting air for cooling and combustion to enter said casing; b. outlet means for permitting consumed air to exhaust from said casing; c. labyrinth passage means for carrying sound waves generated by said power unit, said passage means changing directions a plurality of times, wherein said direction change is 180* in at least one of said plurality of direction changes, and thereby dissipating the energy in said sound waves; d. said labyrinth passage means coupled to said inlet means whereby the air entering the casing through said inlet means passes through said labyrinth means in the longitudinal direction; e. said labyrinth passage means coupled to said outlet means whereby the air exhausting from said casing through said outlet means passes through said labyrinth means; and f. wherein a plurality of said wall means are rotatably mounted for rotating independent portions of said wall means about vertical shafts away from said power unit whereby easy access may be gained to said power unit.
2. The power plant of claim 1 wherein said passage means are sealed from the exterior of the power plant.
US782658A 1968-12-10 1968-12-10 Noiseless soft-running power plant Expired - Lifetime US3642092A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78265868A 1968-12-10 1968-12-10

Publications (1)

Publication Number Publication Date
US3642092A true US3642092A (en) 1972-02-15

Family

ID=25126764

Family Applications (1)

Application Number Title Priority Date Filing Date
US782658A Expired - Lifetime US3642092A (en) 1968-12-10 1968-12-10 Noiseless soft-running power plant

Country Status (1)

Country Link
US (1) US3642092A (en)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3791482A (en) * 1973-05-14 1974-02-12 Coleman Co Noise supression air duct assembly for air cooled internal combustion engines in vehicle installations
US3815965A (en) * 1972-10-10 1974-06-11 Smith & Co Inc Gordon Air compressor housings
US3857453A (en) * 1974-02-21 1974-12-31 Caterpillar Tractor Co Noise suppression means for tractors
FR2248723A5 (en) * 1973-10-19 1975-05-16 Deere John Cie Francaise
US3930558A (en) * 1973-09-17 1976-01-06 Continental Can Company, Inc. Noise reduction kit for can closing machine
JPS51106427U (en) * 1975-02-24 1976-08-25
US3989415A (en) * 1973-08-27 1976-11-02 Atlas Copco Aktiebolag Silencing housing for a machine plant
US4020900A (en) * 1974-01-31 1977-05-03 Kabushiki Kaisha Komatsu Seisakusho Device for ventilating cooling air of construction
JPS52171030U (en) * 1976-06-18 1977-12-26
US4071009A (en) * 1976-06-28 1978-01-31 Caterpillar Tractor Co. Combined noise suppressing and air flow guide enclosure for engines
FR2373411A1 (en) * 1976-12-07 1978-07-07 Linde Ag INTERNAL COMBUSTION ENGINE LIFT LOADER
FR2383338A1 (en) * 1977-03-07 1978-10-06 Maco Meudon Sa Engine driven air compressor mounted on trailer - has double walls and doors to direct cooling air flow and improve silencing
US4385678A (en) * 1979-02-23 1983-05-31 Cederbaum Jerzy H Silent-running internal combustion motor power unit
DE3502000A1 (en) * 1984-02-09 1985-08-22 Valmet Oy, Helsinki DIESEL UNIT
US4733750A (en) * 1987-02-11 1988-03-29 Kohler Co. Acoustic enclosure for marine engine generator set
US4844701A (en) * 1987-12-02 1989-07-04 The Gorman-Rupp Company Mobile pump apparatus
US5297517A (en) * 1991-08-19 1994-03-29 Caterpillar Inc. Noise suppression enclosure for an engine
US5550333A (en) * 1995-01-10 1996-08-27 Whiteman Industries, Inc. Reduced noise trailerable engine
US5837890A (en) * 1994-12-12 1998-11-17 Aero Systems Engineering, Inc. Jet engine test cell structure
US6089650A (en) * 1998-07-24 2000-07-18 Ingersoll-Rand Company Sound attenuating enclosure for a machine
US20060144637A1 (en) * 2004-12-23 2006-07-06 Ingersoll-Rand Company Sound-attenuating enclosure with integral cooling ducts
WO2008140408A1 (en) * 2007-05-15 2008-11-20 Scania Cv Ab (Publ) A device for reducing noise from a motor vehicle and a vehicle provide with the same
JP2014031719A (en) * 2012-08-01 2014-02-20 Nippon Sharyo Seizo Kaisha Ltd Engine working machine
JP2017198143A (en) * 2016-04-27 2017-11-02 Skシステム株式会社 Low noise type power generator

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB338697A (en) * 1928-10-29 1930-11-27 Henri Farman Improvements in testing plants for internal combustion engines
GB357147A (en) * 1930-06-16 1931-09-16 Electrical Res Prod Inc Improvements in or relating to silencing arrangements for internal combustion engines and other machinery
US1962441A (en) * 1930-07-08 1934-06-12 Warner Bros Acoustic-cinematographic apparatus
FR914203A (en) * 1945-03-30 1946-10-02 Moteurs Lab Et Improvements to test facilities, particularly for engines
GB640740A (en) * 1948-02-26 1950-07-26 Paxman & Co Ltd Davey Improvements in or relating to sound insulating and absorbing means for internal combustion engines
US2701024A (en) * 1947-10-01 1955-02-01 Ford Motor Co Resonator mounting on underside of hood
US2881860A (en) * 1955-04-11 1959-04-14 William A Ternes Air cleaner and silencer
FR1208482A (en) * 1958-06-13 1960-02-24 Improvements made to the means for soundproofing groups comprising at least one heat engine and in particular generating sets
CA761751A (en) * 1967-06-27 Vokes Limited Sound absorbing system for engine noise
GB1088454A (en) * 1963-10-22 1967-10-25 Cederbaum Jerzy Henryk Improvements in or relating to power units
FR1521057A (en) * 1967-04-27 1968-04-12 Hatz Motoren Sound-absorbing enclosure for mechanical noise-generating assemblies

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA761751A (en) * 1967-06-27 Vokes Limited Sound absorbing system for engine noise
GB338697A (en) * 1928-10-29 1930-11-27 Henri Farman Improvements in testing plants for internal combustion engines
GB357147A (en) * 1930-06-16 1931-09-16 Electrical Res Prod Inc Improvements in or relating to silencing arrangements for internal combustion engines and other machinery
US1962441A (en) * 1930-07-08 1934-06-12 Warner Bros Acoustic-cinematographic apparatus
FR914203A (en) * 1945-03-30 1946-10-02 Moteurs Lab Et Improvements to test facilities, particularly for engines
US2701024A (en) * 1947-10-01 1955-02-01 Ford Motor Co Resonator mounting on underside of hood
GB640740A (en) * 1948-02-26 1950-07-26 Paxman & Co Ltd Davey Improvements in or relating to sound insulating and absorbing means for internal combustion engines
US2881860A (en) * 1955-04-11 1959-04-14 William A Ternes Air cleaner and silencer
FR1208482A (en) * 1958-06-13 1960-02-24 Improvements made to the means for soundproofing groups comprising at least one heat engine and in particular generating sets
GB1088454A (en) * 1963-10-22 1967-10-25 Cederbaum Jerzy Henryk Improvements in or relating to power units
FR1521057A (en) * 1967-04-27 1968-04-12 Hatz Motoren Sound-absorbing enclosure for mechanical noise-generating assemblies

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3815965A (en) * 1972-10-10 1974-06-11 Smith & Co Inc Gordon Air compressor housings
US3791482A (en) * 1973-05-14 1974-02-12 Coleman Co Noise supression air duct assembly for air cooled internal combustion engines in vehicle installations
US3989415A (en) * 1973-08-27 1976-11-02 Atlas Copco Aktiebolag Silencing housing for a machine plant
US3930558A (en) * 1973-09-17 1976-01-06 Continental Can Company, Inc. Noise reduction kit for can closing machine
FR2248723A5 (en) * 1973-10-19 1975-05-16 Deere John Cie Francaise
US4020900A (en) * 1974-01-31 1977-05-03 Kabushiki Kaisha Komatsu Seisakusho Device for ventilating cooling air of construction
US3857453A (en) * 1974-02-21 1974-12-31 Caterpillar Tractor Co Noise suppression means for tractors
JPS51106427U (en) * 1975-02-24 1976-08-25
JPS52171030U (en) * 1976-06-18 1977-12-26
US4071009A (en) * 1976-06-28 1978-01-31 Caterpillar Tractor Co. Combined noise suppressing and air flow guide enclosure for engines
US4189020A (en) * 1976-12-07 1980-02-19 Linde Aktiengesellschaft Fork-lift truck with internal-combustion engine
FR2373411A1 (en) * 1976-12-07 1978-07-07 Linde Ag INTERNAL COMBUSTION ENGINE LIFT LOADER
FR2383338A1 (en) * 1977-03-07 1978-10-06 Maco Meudon Sa Engine driven air compressor mounted on trailer - has double walls and doors to direct cooling air flow and improve silencing
US4385678A (en) * 1979-02-23 1983-05-31 Cederbaum Jerzy H Silent-running internal combustion motor power unit
DE3502000A1 (en) * 1984-02-09 1985-08-22 Valmet Oy, Helsinki DIESEL UNIT
US4733750A (en) * 1987-02-11 1988-03-29 Kohler Co. Acoustic enclosure for marine engine generator set
US4844701A (en) * 1987-12-02 1989-07-04 The Gorman-Rupp Company Mobile pump apparatus
US5297517A (en) * 1991-08-19 1994-03-29 Caterpillar Inc. Noise suppression enclosure for an engine
US5837890A (en) * 1994-12-12 1998-11-17 Aero Systems Engineering, Inc. Jet engine test cell structure
US5550333A (en) * 1995-01-10 1996-08-27 Whiteman Industries, Inc. Reduced noise trailerable engine
US6089650A (en) * 1998-07-24 2000-07-18 Ingersoll-Rand Company Sound attenuating enclosure for a machine
US20060144637A1 (en) * 2004-12-23 2006-07-06 Ingersoll-Rand Company Sound-attenuating enclosure with integral cooling ducts
EP1829190A2 (en) * 2004-12-23 2007-09-05 Ingersoll-Rand Company Sound-attenuating enclosure with integral cooling ducts
EP1829190A4 (en) * 2004-12-23 2009-07-29 Doosan Internat Usa Inc Sound-attenuating enclosure with integral cooling ducts
WO2008140408A1 (en) * 2007-05-15 2008-11-20 Scania Cv Ab (Publ) A device for reducing noise from a motor vehicle and a vehicle provide with the same
JP2014031719A (en) * 2012-08-01 2014-02-20 Nippon Sharyo Seizo Kaisha Ltd Engine working machine
JP2017198143A (en) * 2016-04-27 2017-11-02 Skシステム株式会社 Low noise type power generator

Similar Documents

Publication Publication Date Title
US3642092A (en) Noiseless soft-running power plant
US2177687A (en) Electric generator unit
US10411556B1 (en) Enclosure with inlet and outlet baffles for generator set
GB1210205A (en) Improvements in sound absorbing structure
KR880009248A (en) Heat pipe type heat exchanger for ventilation
US4385678A (en) Silent-running internal combustion motor power unit
JP5720184B2 (en) Cooling device for power converter
US1906533A (en) Air circulating device
US2177686A (en) Engine driven generator system
JP3120326B2 (en) Soundproof engine generator
JP2867119B2 (en) Cooling structure of soundproof water-cooled engine welding machine
JPH1066306A (en) Totally-enclosed outer fan-cooled motor
JP3712664B2 (en) Soundproof power generator
JP3974456B2 (en) Power generator
JPS5686047A (en) Rotary electric machine
EP0007331A1 (en) Silent running internal combustion motor power unit
GB1322395A (en) Forced-draught heat exchangers
JPS6347616Y2 (en)
WO2021221065A1 (en) Enclosure and power generation equipment
JP2003193861A (en) Soundproof power generation apparatus
JPH04308323A (en) Sound insulating case for engine
JP2592289Y2 (en) Storage structure of power generator
JPH04308322A (en) Sound insulating type engine work machine
ES2122081T3 (en) AIR REFRIGERATOR.
JPH0456540B2 (en)