EP1225317A1 - Rasenmäher mit Brennkraftmaschine - Google Patents

Rasenmäher mit Brennkraftmaschine Download PDF

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Publication number
EP1225317A1
EP1225317A1 EP02075208A EP02075208A EP1225317A1 EP 1225317 A1 EP1225317 A1 EP 1225317A1 EP 02075208 A EP02075208 A EP 02075208A EP 02075208 A EP02075208 A EP 02075208A EP 1225317 A1 EP1225317 A1 EP 1225317A1
Authority
EP
European Patent Office
Prior art keywords
mowing
exhaust
exhaust gases
machine according
mowing machine
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.)
Withdrawn
Application number
EP02075208A
Other languages
English (en)
French (fr)
Inventor
Hugo Verschatse
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
Priority claimed from BE2001/0044A external-priority patent/BE1013924A5/nl
Application filed by Individual filed Critical Individual
Publication of EP1225317A1 publication Critical patent/EP1225317A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/08—Use of engine exhaust gases for pumping cooling-air
    • 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
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/02—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for hand-held tools
    • 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
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • F02B77/13—Acoustic insulation
    • 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
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/06—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for hand-held tools or portables devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/04—Pump-driving arrangements

Definitions

  • a similar intake body can, for instance, be carried out in a very simple manner as a blade wheel rotatably installed or as a number of surfaces radially protruding rotatably together around a common shaft.
  • the rotatable surfaces are moved forward by the flow of exhaust gases, so that the intake body is driven. Because of this the surfaces in the intake duct are also moved as a result of which an intake effect is produced and consequently air is taken in.
  • An additional advantage of such an intake element is that the intensity of the sound waves in the ducts is reduced, because the sound waves reverberate against the rotating surfaces.
  • the sound deadening wall consists of at least two layers of sound deadening material, whereas between each two successive layers of sound deadening material a respective intermediate space is provided.
  • a similar wall provides an excellent sound deadening.
  • the engine device In order to deaden the sound in an efficient manner the engine device is carried out such, that the exhaust duct of the combustion engine ends in an intermediate space between two successive layers of sound deadening material.
  • the mowing machine is provided with a rotatable mowing means and the cooling system is provided with conducting means to conduct the exhaust gases flowing out, to the mowing means in a flowing direction corresponding with the sense of rotation of the cutting means.
  • this grass cutter comprises a combustion engine (1) with an engine exhaust or muffler (14) to which an exhaust pipe (17) is connected. These parts are provided above the said shielding hood (16).
  • the exhaust gases end up in the space (18) under the shielding hood (16).
  • the direction of the outflow of these exhaust gases is perpendicular to the plane of rotation of the knife (12) and therefore also perpendicular to the ground surface covered with grass, during the time the grass cutter is used. Because of this a good sound absorption is obtained in the ground.
  • An existing grass cutter can be transformed into a grass cutter according to the invention with very little means and in a very simple and cheap manner.
  • the piping system conducting the exhaust gases to the operating space (18) of the knife (12) may consist of any material.
  • the sound leaving the engine device via the exhaust is conducted under the shielding hood (16). Because this sound is absorbed by the lawn to be mowed and by the ground underneath and which is repeatedly reflected on the shielding hood, a deadening of this sound is obtained. Because of this it is possible that the rotating parts of the knife will experience very little resistance, but at the same time they will further the absorption of the sound. The contact with the rotating knives (the mowing means in general) also will cause a small additional deadening of the sound.
  • each opening there is a multiple valve (3) with a number of radially directed wings (7) rotatable around a thin shaft (6).
  • the thin shaft (6) is situated in the plane of the opening between these two ducts (4),(5).
  • Each valve (3) has two, three or four radial wings (7) and is, as a whole, rotatable around its shaft (6).
  • the flow of exhaust gases (see arrow from right to left in the exhaust pipe (5) in figure 1) causes the anti-clockwise rotating movement of the valves (3).
  • Each time a wing (7) moves in the cooling air pipe (4) it causes a suction effect in that pipe (4), because of which cooling air is taken in (from left to right in figure 3: see arrow in the cooling air pipe (4)).
  • the sound waves in the exhaust pipe (5) are also broken and the sound waves in the cooling air pipe (4) are hit towards the exhaust pipe (5) via the opening between the two ducts (4),(5). Also note that possible sound waves in the cooling air pipe move from right to left (see figure 5) away from the engine, and therefore will move against the flow of cooling air, so that in doing so they are up against a strong resistance. Because of this an additional deadening of the sound is obtained.
  • the cooling air is blown into the space (2) where the engine is situated and/or into the space (10) provided in which the exhaust pipe (5) ends (see further on).
  • a grass cutter with sound deadening hoods (see figures 5 and 6) comprises a shielding hood (16) with a horizontal plate on which a petrol engine (1) with a muffler (14) is installed.
  • the shaft (15) of the engine (1) extends via a passage in this plate of the shielding hood (16) below this plate where it is connected to a horizontal body extending symmetrically with respect to the shaft (15) and carrying a respective knife (12) on both extremities.
  • a set of three hoods (9A), (9B), (9C) with intermediate spaces (2), (10), (11) is provided on the plate (16), so that the combustion engine (1) and the muffler (14) are situated in a central space (2) which sideways and on top is confined by the inner hood (9A).
  • the middle hood (9B) surrounds the inner hood (9A) sideways and at the top and the outer hood (9C) surrounds the middle hood sideways and at the top. Between the successive hoods an intermediate space (10), (11) is provided each time.
  • the horizontal plate of the shielding hood (16) confines all spaces (2), (10), (11) at the bottom.
  • the exhaust pipe (5) runs through an opening in the inner hood (9A) into the space (10) between the inner hood (9A) and the middle hood (9B), extends in this space according to the sense of rotation of the knives (12) and ends in this space (10). In this space the exhaust gases are therefore ejected clockwise. This is also the sense of rotation of the knives (12).
  • the horizontal plate of the shielding hood (16) has rectangular openings (13) which are formed because rectangular parts (8) of this plate have been cut out on three sides, and while remaining connected to the plate with one side, are sloping upwards against the direction of the flow of the exhaust gases (see also figures 7, 8 and 9).
  • Each opening (13) lets through a part of the exhaust gases above the sloping parts of the plate and catches a portion of the exhaust gases, so that they reach the knives (12) with an anti-clockwise direction of the flow, corresponding with the sense of rotation of the knives (12).
  • cooling air pipes (4) are provided, which extend beside the exhaust pipe (5) and, as described above, are provided with multiple valves (3) which can rotate in both pipes (4), (5) via openings (which connect the exhaust pipe (5) with the cooling air pipe (4).
  • the cooling air pipes (4) have their intake opening in an opening in the middle hood (9B). Therefore the cooling air originates from the space (11) between the middle hood (9B) and the outer hood (9C).
  • the cooling air pipe (4) represented at the bottom of figure 6 brings cooling air into the central space (2) in which the engine (1) and the muffler (14) are installed.
  • the two other cooling air pipes (4) bend down and end in the exhaust space (10) in order to cool this space (10) also.
  • the cooling air circulates in this space (10) and will also cool down the exhaust pipe (5) installed in this space.
  • the grass collecting bin and the passage ending in this collecting bin require a specific design. Openings might be provided through the hoods, for instance to allow the throttle lever to pass through or to give access to an oil gauge or oil tank.
  • the petrol tank is installed outside the hoods.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Harvester Elements (AREA)
EP02075208A 2001-01-17 2002-01-17 Rasenmäher mit Brennkraftmaschine Withdrawn EP1225317A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
BE200100044 2001-01-17
BE2001/0044A BE1013924A5 (nl) 2001-01-17 2001-01-17 Verbrandingsmotor met koelinrichting.
BE2001/0824A BE1014548A6 (nl) 2001-01-17 2001-12-19 Maaimachine met verbrandingsmotor.
BE200100824 2001-12-19

Publications (1)

Publication Number Publication Date
EP1225317A1 true EP1225317A1 (de) 2002-07-24

Family

ID=25663230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02075208A Withdrawn EP1225317A1 (de) 2001-01-17 2002-01-17 Rasenmäher mit Brennkraftmaschine

Country Status (2)

Country Link
EP (1) EP1225317A1 (de)
BE (1) BE1014548A6 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1393612A1 (de) * 2002-08-28 2004-03-03 Werner Kress Rasenmäher
ITRE20090092A1 (it) * 2009-09-22 2011-03-23 Emak Spa Sistema di scarico per tosaerba

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE463257C (de) * 1928-07-25 Heinrich Oelsner Kuehlvorrichtung fuer Zylinder von Brennkraftmaschinen
US3191377A (en) * 1961-12-11 1965-06-29 Continental Aviat & Eng Corp Turbo-jet fan muffler
DE2519842A1 (de) * 1975-05-03 1976-11-11 Fichtel & Sachs Ag Brennkraftmaschine mit geraeuschdaempfung
US4060985A (en) * 1975-03-13 1977-12-06 Yanmar Diesel Engine Co., Ltd. Exhaust system of an internal combustion engine
DE2730218A1 (de) * 1977-07-05 1979-01-25 Solo Kleinmotoren Gmbh Rasenmaeher mit verbrennungsmotor
FR2399200A1 (fr) * 1977-08-05 1979-03-02 Wolf Geraete Gmbh Tondeuse a gazon motorisee, commandee par un moteur a combustion interne refroidi par air
FR2474810A1 (fr) * 1980-01-31 1981-08-07 Bernard Moteurs Tondeuse a gazon
DE3120888A1 (de) * 1981-05-26 1982-12-16 Solo Kleinmotoren Gmbh, 7032 Sindelfingen Rasenmaeher mit verbrennungsmotor
US4380971A (en) * 1980-08-16 1983-04-26 Klockner-Humboldt-Deutz Aktiengesellschaft Internal combustion engine having a retarder

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE463257C (de) * 1928-07-25 Heinrich Oelsner Kuehlvorrichtung fuer Zylinder von Brennkraftmaschinen
US3191377A (en) * 1961-12-11 1965-06-29 Continental Aviat & Eng Corp Turbo-jet fan muffler
US4060985A (en) * 1975-03-13 1977-12-06 Yanmar Diesel Engine Co., Ltd. Exhaust system of an internal combustion engine
DE2519842A1 (de) * 1975-05-03 1976-11-11 Fichtel & Sachs Ag Brennkraftmaschine mit geraeuschdaempfung
DE2730218A1 (de) * 1977-07-05 1979-01-25 Solo Kleinmotoren Gmbh Rasenmaeher mit verbrennungsmotor
FR2399200A1 (fr) * 1977-08-05 1979-03-02 Wolf Geraete Gmbh Tondeuse a gazon motorisee, commandee par un moteur a combustion interne refroidi par air
FR2474810A1 (fr) * 1980-01-31 1981-08-07 Bernard Moteurs Tondeuse a gazon
US4380971A (en) * 1980-08-16 1983-04-26 Klockner-Humboldt-Deutz Aktiengesellschaft Internal combustion engine having a retarder
DE3120888A1 (de) * 1981-05-26 1982-12-16 Solo Kleinmotoren Gmbh, 7032 Sindelfingen Rasenmaeher mit verbrennungsmotor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1393612A1 (de) * 2002-08-28 2004-03-03 Werner Kress Rasenmäher
ITRE20090092A1 (it) * 2009-09-22 2011-03-23 Emak Spa Sistema di scarico per tosaerba
EP2298059A1 (de) * 2009-09-22 2011-03-23 Emak S.p.A. Abgassystem für einen Rasenmäher

Also Published As

Publication number Publication date
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