WO2006069552A1 - Carburetor with a fuel injection system for starting engines - Google Patents

Carburetor with a fuel injection system for starting engines Download PDF

Info

Publication number
WO2006069552A1
WO2006069552A1 PCT/CZ2005/000096 CZ2005000096W WO2006069552A1 WO 2006069552 A1 WO2006069552 A1 WO 2006069552A1 CZ 2005000096 W CZ2005000096 W CZ 2005000096W WO 2006069552 A1 WO2006069552 A1 WO 2006069552A1
Authority
WO
WIPO (PCT)
Prior art keywords
carburetor
holes
cylindrical boss
injection system
lateral cylindrical
Prior art date
Application number
PCT/CZ2005/000096
Other languages
French (fr)
Inventor
Karel Marhoun
Original Assignee
Motoco A.S.
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 Motoco A.S. filed Critical Motoco A.S.
Publication of WO2006069552A1 publication Critical patent/WO2006069552A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F02M1/16—Other means for enriching fuel-air mixture during starting; Priming cups; using different fuels for starting and normal operation

Definitions

  • the invention relates to the field of carburetors, more specifically to a carburetor with a fuel injection system for starting engines.
  • Carburetors of small combustions engines used for driving small agricultural machinery or hand-tools such as chain saws are usually attached to a suction piping together with inlet air filters as a rule by means of two through bolts.
  • the carburetor body is provided by holes to enable passing said bolts through the body.
  • the holes are formed either in end flanges of the carburetor body or pass through the carburetor body material along its entire length.
  • Said carburetors are often provided with a fuel injection system to ease the starting of engines.
  • An ejecting chamber and a respective balloon pertaining to such a system are located laterally on the sides of the carburetor body and consequently they projects into the area where the through bolts pass to fix the carburetor body together with the inlet air filter to the suction piping. Therefore, either two independent fixing systems are used i.e. the carburetor is fixed to the suction piping and the inlet air filter to the carburetor or the holes for the through bolts are formed at other places.
  • the first type of fixing includes a greater number of fixing elements - bolts and therefore it difficulties may be faced during the assembling and disassembling process, specifically this type is more time-consuming.
  • the second type of fixing requires modifications to the carburetor body. Such modifications result in greater carburetor size and weight and as the carburetor body is a casting the carburetor is more complicated and expensive as to its manufacture. The increased size is accompanied by the requirement for a greater built-in space. The distribution of the holes for the through bolts over other places of the carburetor body may result in the necessity to make appropriate changes to the inlet air filter structure and to the suction piping.
  • the object of the invention is to preserve the possibility to fix a carburetor with a fuel injection for starting engines to a suction piping together with an inlet air filter by means of through bolts without causing a complication arising in connection with the construction of carburetor body casting and without noticeably increasing its built-in dimensions.
  • the said object of invention is achieved by a carburetor with fuel injection for starting engines which injection system comprises an ejecting room with a balloon located at a lateral cylindrical boss made on the carburetor body which body is provided with end flanges having holes for fixing bolts according to the invention wherein the substantial features of the invention are that the first end flange which engages directly the lateral cylindrical boss is provided with two holes which are disposed coaxial to the holes in the second end flange whereby the first hole of the first end flange passes through the lateral cylindrical boss in the area below the ejecting room and besides the mouth thereof.
  • the most advantageous configuration is obtained when the end flanges and the lateral cylindrical boss are made as an integral part of the body which is a casting.
  • Fig. 1 is a side view of a carburetor
  • Fig. 2 is a plane view of a carburetor
  • Fig. 3 is a view of a carburetor from below
  • Fig. 4 is a sectional view along the line A-A of Fig. 1
  • Fig. 5 is a sectional view along the line B-B of Fig. 1.
  • a carburetor appearing in Fig. 1 to Fig. 3, including a fuel injection system for starting engines comprises a body 1 provided with end flanges 2 and 3 and a lateral cylindrical boss 4.
  • the lateral cylindrical boss 4 engages directly the first flange 2.
  • the body 1 includes a venruri 9.
  • the carburetor body 1 is a casting the integral parts of which are the end flanges 2 and 3 as well as the lateral cylindrical boss 4.
  • an ejecting room 5 is formed and closed by a balloon 6 (Fig. 4).
  • the ejecting room 5 together with the balloon 6 is a part of a conventional fuel injection system for starting engines.
  • the ejecting room 5 has a bottom 7 in which a hole 8 is formed which hole connects the ejecting room 5 to further parts of the fuel injection system.
  • the first end flange 2 is provided by two holes 21 and 22 on the opposite lateral sides which holes are disposed coaxially to the holes 31 and 32 in the second flange 3.
  • the second end flange 3 is provided with technological holes 33.
  • the first hole 21 of the first end flange 2 passes through the lateral cylindrical boss 4 in the area below the bottom 7 of the ejecting room 5 and besides the mouth 8 of the ejecting room 5.
  • the fixing of the carburetor to a suction piping is performed together with the inlet air filter (also not shown) by means of two through bolts.
  • Such bolts go through the holes 21 and 22 in the first end flange 2, through the holes 31 and 32 in the second end flange 3 and through the respective coaxial holes in the suction piping.
  • the carburetor according to the invention is applicable to small combustion engines preferably used for driving small agricultural machines or hand tools, such as chain saws. Subject to an appropriate adaptation it may be applied also to combustion engines used for other purposes.

Abstract

A carburetor is provided with a fuel injection system for starting engines. This injection system has an ejecting room (5) with a balloon (6) located in a lateral cylindrical boss (4) of the carburetor body (1). The carburetor body (1) is provided with end flanges (2,3). In the first end flange (2) two holes (21,22) are made which are disposed coaxially to holes (31,32) in the second end flange (3). The holes (21,22,31 and 32) are designated to receive through bolts by means of which the carburetor is fixed together with an inlet air filter to a suction piping. The lateral cylindrical boss (4) engages directly the first end flange (2). The first hole (21) in the first end flange (2) passes through the lateral cylindrical boss (4) in the area below a bottom (7) of the ejecting room (5) besides a mouth (8) of the ejecting room (5). The end flanges (2,3) and the lateral cylindrical boss (4) are made as an integral part of the body (1) which is a casting.

Description

Carburetor with a fuel injection system for starting engines
Background and summary of the invention
The invention relates to the field of carburetors, more specifically to a carburetor with a fuel injection system for starting engines.
Carburetors of small combustions engines used for driving small agricultural machinery or hand-tools such as chain saws are usually attached to a suction piping together with inlet air filters as a rule by means of two through bolts. The carburetor body is provided by holes to enable passing said bolts through the body. The holes are formed either in end flanges of the carburetor body or pass through the carburetor body material along its entire length.
Said carburetors are often provided with a fuel injection system to ease the starting of engines. An ejecting chamber and a respective balloon pertaining to such a system are located laterally on the sides of the carburetor body and consequently they projects into the area where the through bolts pass to fix the carburetor body together with the inlet air filter to the suction piping. Therefore, either two independent fixing systems are used i.e. the carburetor is fixed to the suction piping and the inlet air filter to the carburetor or the holes for the through bolts are formed at other places. The first type of fixing includes a greater number of fixing elements - bolts and therefore it difficulties may be faced during the assembling and disassembling process, specifically this type is more time-consuming. The second type of fixing requires modifications to the carburetor body. Such modifications result in greater carburetor size and weight and as the carburetor body is a casting the carburetor is more complicated and expensive as to its manufacture. The increased size is accompanied by the requirement for a greater built-in space. The distribution of the holes for the through bolts over other places of the carburetor body may result in the necessity to make appropriate changes to the inlet air filter structure and to the suction piping.
The object of the invention is to preserve the possibility to fix a carburetor with a fuel injection for starting engines to a suction piping together with an inlet air filter by means of through bolts without causing a complication arising in connection with the construction of carburetor body casting and without noticeably increasing its built-in dimensions. The said object of invention is achieved by a carburetor with fuel injection for starting engines which injection system comprises an ejecting room with a balloon located at a lateral cylindrical boss made on the carburetor body which body is provided with end flanges having holes for fixing bolts according to the invention wherein the substantial features of the invention are that the first end flange which engages directly the lateral cylindrical boss is provided with two holes which are disposed coaxial to the holes in the second end flange whereby the first hole of the first end flange passes through the lateral cylindrical boss in the area below the ejecting room and besides the mouth thereof.
As to the manufacturing aspects the most advantageous configuration is obtained when the end flanges and the lateral cylindrical boss are made as an integral part of the body which is a casting.
Brief description of the drawings
One of potential examples of the embodiment of a carburetor with a fuel injection system for starting engines according to the invention is shown on the accompanying drawings where:
Fig. 1 is a side view of a carburetor; Fig. 2 is a plane view of a carburetor; Fig. 3 is a view of a carburetor from below; Fig. 4 is a sectional view along the line A-A of Fig. 1 ; and Fig. 5 is a sectional view along the line B-B of Fig. 1.
Detailed description of the preferred embodiments
A carburetor appearing in Fig. 1 to Fig. 3, including a fuel injection system for starting engines comprises a body 1 provided with end flanges 2 and 3 and a lateral cylindrical boss 4. The lateral cylindrical boss 4 engages directly the first flange 2. In its longitudinal direction, the body 1 includes a venruri 9. The carburetor body 1 is a casting the integral parts of which are the end flanges 2 and 3 as well as the lateral cylindrical boss 4. In the lateral cylindrical boss 4 an ejecting room 5 is formed and closed by a balloon 6 (Fig. 4). The ejecting room 5 together with the balloon 6 is a part of a conventional fuel injection system for starting engines. The ejecting room 5 has a bottom 7 in which a hole 8 is formed which hole connects the ejecting room 5 to further parts of the fuel injection system.
The first end flange 2 is provided by two holes 21 and 22 on the opposite lateral sides which holes are disposed coaxially to the holes 31 and 32 in the second flange 3. In addition, the second end flange 3 is provided with technological holes 33. The first hole 21 of the first end flange 2 passes through the lateral cylindrical boss 4 in the area below the bottom 7 of the ejecting room 5 and besides the mouth 8 of the ejecting room 5.
The fixing of the carburetor to a suction piping (not shown) is performed together with the inlet air filter (also not shown) by means of two through bolts. Such bolts go through the holes 21 and 22 in the first end flange 2, through the holes 31 and 32 in the second end flange 3 and through the respective coaxial holes in the suction piping.
The carburetor according to the invention is applicable to small combustion engines preferably used for driving small agricultural machines or hand tools, such as chain saws. Subject to an appropriate adaptation it may be applied also to combustion engines used for other purposes.

Claims

C L A I M S
1. A carburetor with a fuel injection system for starting engines which injection system comprises an ejecting room with a balloon located in a lateral cylindrical boss on the carburetor body, which body is provided with end flanges having holes for fixing bolts characterized in that the first end flange (2) which engages directly the lateral cylindrical boss (4) is provided with two holes (21,22) which are coaxial with respect to the holes (31,32) in the second flange (3) whereby the first hole (21) in the first end flange (2) passes through the lateral cylindrical boss (4) in the area below a bottom (7) of the ejecting room (5) and besides the mouth (8) of the ejecting room (5)
2. A carburetor according to claim 1 characterized in that the end flanges (2,3) and the lateral cylindrical boss (4) are made as a part of the body (1) which is a casting.
PCT/CZ2005/000096 2004-12-29 2005-12-20 Carburetor with a fuel injection system for starting engines WO2006069552A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZPV2004-1253 2004-12-29
CZ20041253A CZ20041253A3 (en) 2004-12-29 2004-12-29 Carburetor with fuel injection system for starting

Publications (1)

Publication Number Publication Date
WO2006069552A1 true WO2006069552A1 (en) 2006-07-06

Family

ID=36084796

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CZ2005/000096 WO2006069552A1 (en) 2004-12-29 2005-12-20 Carburetor with a fuel injection system for starting engines

Country Status (2)

Country Link
CZ (1) CZ20041253A3 (en)
WO (1) WO2006069552A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4197825A (en) * 1977-11-25 1980-04-15 Tecumseh Products Company Primer bulb retainer
EP1243784A2 (en) * 2001-03-22 2002-09-25 Walbro Corporation Carburetor with fuel enrichment
US20030062633A1 (en) * 2001-10-03 2003-04-03 Woody John C. Carburetor fuel priming pump with integral fuel bowl drain
US20040178520A1 (en) * 2003-03-13 2004-09-16 Pavel Krlin Push button air primer for carburetor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4197825A (en) * 1977-11-25 1980-04-15 Tecumseh Products Company Primer bulb retainer
EP1243784A2 (en) * 2001-03-22 2002-09-25 Walbro Corporation Carburetor with fuel enrichment
US20030062633A1 (en) * 2001-10-03 2003-04-03 Woody John C. Carburetor fuel priming pump with integral fuel bowl drain
US20040178520A1 (en) * 2003-03-13 2004-09-16 Pavel Krlin Push button air primer for carburetor

Also Published As

Publication number Publication date
CZ20041253A3 (en) 2006-08-16

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