JPH064358U - Engine intake intake structure - Google Patents

Engine intake intake structure

Info

Publication number
JPH064358U
JPH064358U JP4454692U JP4454692U JPH064358U JP H064358 U JPH064358 U JP H064358U JP 4454692 U JP4454692 U JP 4454692U JP 4454692 U JP4454692 U JP 4454692U JP H064358 U JPH064358 U JP H064358U
Authority
JP
Japan
Prior art keywords
engine
air
intake
cooling fan
cooling
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.)
Granted
Application number
JP4454692U
Other languages
Japanese (ja)
Other versions
JP2571975Y2 (en
Inventor
博路 川崎
宏 菅野
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.)
Kyoritsu Co Ltd
Original Assignee
Kyoritsu Co Ltd
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 Kyoritsu Co Ltd filed Critical Kyoritsu Co Ltd
Priority to JP1992044546U priority Critical patent/JP2571975Y2/en
Priority to DE19934319503 priority patent/DE4319503B4/en
Priority to SE9302187A priority patent/SE507513C2/en
Publication of JPH064358U publication Critical patent/JPH064358U/en
Application granted granted Critical
Publication of JP2571975Y2 publication Critical patent/JP2571975Y2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1015—Air intakes; Induction systems characterised by the engine type
    • F02M35/1019—Two-stroke engines; Reverse-flow scavenged or cross scavenged engines
    • 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
    • F01P5/06—Guiding or ducting air to, or from, ducted fans
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02—Air cleaners
    • F02M35/04—Air cleaners specially arranged with respect to engine, to intake system or specially adapted to vehicle; Mounting thereon ; Combinations with other devices
    • F02M35/06—Air cleaners specially arranged with respect to engine, to intake system or specially adapted to vehicle; Mounting thereon ; Combinations with other devices combined or associated with engine's cooling blower or fan, or with flywheel
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1015—Air intakes; Induction systems characterised by the engine type
    • F02M35/1017—Small engines, e.g. for handheld tools, or model engines; Single cylinder engines
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1015—Air intakes; Induction systems characterised by the engine type
    • F02M35/10196—Carburetted engines
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10268—Heating, cooling or thermal insulating means

Abstract

(57)【要約】 【目的】 新たな導風路を設けたり、別個の導風部材を
用いることなく、従来の構造を利用することもできる簡
便な構成で、冷却ファンの遠心効果を利用して浄化され
た空気をエンジンの吸気として取入ることができるエン
ジン吸気取入構造を提供する。 【構成】 エンジンの冷却ファンのファンケースにおけ
るそのボリュート終点部の上部であって気化器の上側に
エンジン吸気用開口部を、冷却ファンによって生成され
る冷却風の流れ方向と逆の方向に形成する。 (57) [Abstract] [Purpose] A simple structure that can utilize the conventional structure without providing a new air guide path or using a separate air guide member, and utilizes the centrifugal effect of the cooling fan. Provided is an engine intake intake structure capable of taking in purified air as intake air of an engine. An engine intake opening is formed above a volute end of a fan case of an engine cooling fan and above a carburetor in a direction opposite to a flow direction of cooling air generated by the cooling fan. .

Description

【考案の詳細な説明】[Detailed description of the device]

【０００１】[0001]

【産業上の利用分野】[Industrial applications]

本考案はエンジンの冷却ファンを備えたエンジン吸気取入構造に関するもので ある。 The present invention relates to an engine intake intake structure having an engine cooling fan.

【０００２】[0002]

【従来の技術】[Prior art]

一般にチェーンソー等の小形の携帯式動力作業機等は、動力源となる内燃エン ジンを強制的に冷却するために冷却ファンを備えている。この冷却ファンの遠心 効果を利用して、あらかじめ、粗大な鋸断屑等を除去した空気をエンジンの吸気 として取入れるために、例えば、特開昭６１−１９０１１１号公報に記載のよう に、ファンハウジング内に空気取入れポートを新たに設けて導風路としたもの等 が提案されているが、このような構成では、個別の導風部材を設けるだけでなく 、ファンハウジング内に空気取入れポートを挿入したりする必要があるので、冷 却風の流れを悪くして冷却効果を低下せしめたり、騒音発生の原因等にもなって いる。 Generally, a small portable power working machine such as a chainsaw is equipped with a cooling fan to forcibly cool an internal combustion engine which is a power source. Utilizing the centrifugal effect of this cooling fan, in order to take in air from which coarse saw dust has been removed in advance as intake air for the engine, for example, as described in JP-A-61-190111, a fan is used. Some proposals have been made such that a new air intake port is provided in the housing to use as an air guide path.However, in such a configuration, not only an individual air guide member is provided, but also an air intake port is provided in the fan housing. Since it has to be inserted, the cooling air flow is impaired, reducing the cooling effect and causing noise.

【０００３】[0003]

【考案が解決しようとする課題】[Problems to be solved by the device]

本考案はエンジンのファンハウジング等にこのような新たな導風路を設けたり 、別個の導風部材を用いることなく、従来の構造を利用して簡便な構成で冷却フ ァンの遠心効果により、あらかじめ、粗大な鋸断屑等を除去された空気をエンジ ンの吸気として取入れることができるエンジン吸気取入構造を提供することを目 的とするものである。 The present invention utilizes the conventional structure without using such a new air guide path in the fan housing of the engine or using a separate air guide member, and uses the conventional structure to provide a simple structure and a centrifugal effect of the cooling fan. The purpose of the present invention is to provide an engine intake air intake structure that can take in air from which coarse sawdust has been removed in advance as engine intake air.

【０００４】[0004]

【課題を解決するための手段】[Means for Solving the Problems]

即ち本考案に係るエンジン吸気取入構造は、エンジンの冷却ファンのファンケ ースのボリュート終点部の上部であって気化器の上側にエンジン吸気用開口部を 、前記冷却ファンによって生成される冷却風の流れ方向と逆の方向に形成した構 成を特徴とするものである。 That is, the engine intake air intake structure according to the present invention has the engine intake opening above the volute end of the fan case of the engine cooling fan and above the carburetor, and the cooling air generated by the cooling fan. It is characterized by a structure formed in the direction opposite to the flow direction of.

【０００５】[0005]

【作用】[Action]

従って、エンジンの冷却ファンによって生成される、粗大な鋸断屑等をも含む 、塵埃を含んだ冷却風は、ファンケースのボリュート曲線に沿って流れ、機体ケ ーシングのエンジンシリンダの周囲等に形成した排風口に強制的に向い、大きな 塵埃等は冷却ファンによって生成される冷却風の流れ方向に移動されて外部へ排 出され、エンジン吸気用開口部が冷却ファンによって生成される冷却風の流れ方 向と逆の方向にあって気化器の上側に形成されているために、あらかじめ大きな 塵埃等を除去された空気のみをエンジンの吸気として取入れることができる。 Therefore, the cooling air that contains dust, including coarse saw dust, generated by the engine cooling fan flows along the volute curve of the fan case and forms around the engine cylinder of the aircraft casing. Forcibly directed to the exhaust port, large dust, etc. are moved in the flow direction of the cooling air generated by the cooling fan and discharged to the outside, and the engine intake opening flows through the cooling air flow generated by the cooling fan. Since it is formed on the upper side of the carburetor in the direction opposite to the direction, only air from which large dust and the like has been removed beforehand can be taken in as intake air for the engine.

【０００６】[0006]

【実施例】【Example】

次に、本考案を図面の実施例に基づいて説明する。 図１は本考案に係る一実施例を示すエンジン吸気取入構造を、チェーンソーに 装備した要部断面図である。このチェーンソーは図１に示したようにチェーンソ ー本体１内に動力源として小形空冷２サイクルガソリンエンジン２を装架してお り、該エンジン２は前記チェーンソー本体１と着脱自在なシリンダカバー９とで 形成された気化器室２１内に配設されたダイヤフラム式気化器３に連結されて、 混合気の供給を受けるようになっている。前記気化器３の上部に該エアクリーナ ４が取付けられており、該エアクリーナ４は吸気管５を介して前記気化器３へ連 結されていて、微細な塵埃を除去して浄化した空気を前記気化器３へ供給するよ うになっている。 Next, the present invention will be described based on the embodiments of the drawings. FIG. 1 is a cross-sectional view of a main part of a chainsaw equipped with an engine intake intake structure according to an embodiment of the present invention. As shown in FIG. 1, this chain saw mounts a small air-cooled two-cycle gasoline engine 2 as a power source in the chain saw body 1, and the engine 2 includes the chain saw body 1 and a removable cylinder cover 9. It is connected to the diaphragm type carburetor 3 arranged in the carburetor chamber 21 formed by the above, and is supplied with the air-fuel mixture. The air cleaner 4 is attached to the upper part of the carburetor 3, and the air cleaner 4 is connected to the carburetor 3 via an intake pipe 5 to remove the fine dust and purify the air. It is designed to supply to vessel 3.

【０００７】 前記エアクリーナ４は円筒状のフィルターエレメント６を有し、その上面を椀 状のエアクリーナ押え７により覆われて、スタッドボルト８を介して前記吸気管 ５側との間に挟持され固定されている。また、前記エアクリーナ４の周囲及び上 方は前記シリンダカバー９によって覆われており、該シリンダカバー９や前記エ ンジン２の冷却ファン１０を覆うボリュートファンケース１１等で、前記エアク リーナ４に導かれる空気は制限される。また、前記シリンダカバー９は、前記フ ァンケース１１のボリュート終点部２０から冷却風の流れの方向と逆の方向に若 干後退した位置の上部に垂直壁１２を有し、前記エアクリーナ４へ導かれる空気 を取入れるエンジン吸気用開口部１３を、前記気化器３の上部に位置する前記垂 直壁１２の下端部の前記ファンケース１１側に形成している。なお、チェーンソ ー本体１は前ハンドル１４、後ハンドル１５を備え、前記前ハンドル１４の前部 には前ハンドガード１６を配置し、前記後ハンドル１５にはスロットルトリガ１ ７及びスロットルコントロールロックアウト１８を有する。The air cleaner 4 has a cylindrical filter element 6, the upper surface of which is covered with a bowl-shaped air cleaner retainer 7, and is sandwiched and fixed between the intake pipe 5 side and a stud bolt 8. ing. Further, the periphery and upper part of the air cleaner 4 are covered with the cylinder cover 9, and are guided to the air cleaner 4 by a volute fan case 11 that covers the cylinder cover 9 and the cooling fan 10 of the engine 2. Air is restricted. Further, the cylinder cover 9 has a vertical wall 12 at the upper part of the position slightly retracted from the volute end portion 20 of the fan case 11 in the direction opposite to the flow direction of the cooling air, and is guided to the air cleaner 4. An engine intake opening 13 for taking in air is formed on the fan case 11 side of the lower end of the vertical wall 12 located above the carburetor 3. The chain saw body 1 is provided with a front handle 14 and a rear handle 15. A front hand guard 16 is arranged in front of the front handle 14, and a throttle trigger 17 and a throttle control lockout 18 are provided on the rear handle 15. Have.

【０００８】 従って、冷却ファン１０によって生成された粗大な塵埃をも含んだ冷却風はフ ァンケース１１のボリュート曲線に沿って流れるが、ファンケース１１のボリュ ート曲線終点に来ると、大きな鋸断屑等の塵埃は遠心及び慣性効果等により図１ の仮想二点鎖線で示すシリンダのファンケース１１とは反対側周囲に形成された 排風口１９に導かれて外部に放出される。この流れとは別に、ファンケース１１ のボリュート終点部２０では、該ボリュート終点部の上部に位置するシリンダカ バー９の垂直壁１２の前面部がエアーポケットとなり、このエアーポケットの粗 大な塵埃を除去された空気は、前記冷却ファン１０によって生成される冷却風の 流れ方向と逆の方向にエンジン吸気用開口部１３から気化器３へ吸入される。 なお、シリンダカバー９の垂直壁１２のファンケース１１とは反対側の、より 高温な排風口１９側にもエンジン吸気用開口部（図示せず）を設け、適当な切り 替えシャッタ手段により、外気温に応じて、高温又は低温の空気を気化器３に吸 気せしめることもできる。Therefore, the cooling air containing coarse dust generated by the cooling fan 10 flows along the volute curve of the fan case 11, but when the end of the volute curve of the fan case 11 is reached, a large sawtooth cut occurs. Due to centrifugal force and inertial effect, dust such as dust is guided to an air exhaust port 19 formed around the side opposite to the fan case 11 of the cylinder shown by the phantom two-dot chain line in FIG. 1 and discharged to the outside. Apart from this flow, in the volute end portion 20 of the fan case 11, the front surface of the vertical wall 12 of the cylinder cover 9 located above the volute end portion serves as an air pocket, and coarse dust in the air pocket is removed. The generated air is sucked into the carburetor 3 from the engine intake opening 13 in the direction opposite to the flow direction of the cooling air generated by the cooling fan 10. It should be noted that an engine intake opening (not shown) is also provided on the side of the vertical wall 12 of the cylinder cover 9 opposite to the fan case 11 on the side of the hotter exhaust port 19 and the outside is provided by an appropriate switching shutter means. It is also possible to cause the carburetor 3 to suck hot or cold air depending on the temperature.

【０００９】[0009]

【考案の効果】[Effect of device]

以上の説明から明らかな通り本考案によれば、冷却ファンのファンケースのボ リュート終点部の上部であって気化器の上側にエンジン吸気用開口部を形成する という簡単な構成により、冷却ファンによって生成される冷却風の流れ方向と逆 の方向に、あらかじめ粗大な塵埃を除去された空気をエンジンの吸気として取入 れることができ、ファンケース等に新たな導風路を設けたり、別個の導風部材を 用いることなく、従来の構造を利用することもできる、構造が簡単で除塵性能の すぐれたエンジン吸気取入構造を提供できる。 As is apparent from the above description, according to the present invention, the cooling fan is provided with a simple structure in which the engine intake opening is formed above the volute end portion of the fan case of the cooling fan and above the carburetor. The air from which coarse dust has been removed in advance can be taken in as intake air for the engine in the direction opposite to the direction of the generated cooling air, and a new air guide path can be provided in the fan case, etc. It is possible to provide an engine intake air intake structure having a simple structure and excellent dust removal performance, which can use a conventional structure without using a baffle member.

【図面の簡単な説明】[Brief description of drawings]

【図１】本考案に係るエンジン吸気取入構造の一実施例
を備えたチェーンソーの要部断面図。FIG. 1 is a cross-sectional view of a main part of a chainsaw having an embodiment of an engine intake intake structure according to the present invention.

【符号の説明】[Explanation of symbols]

２ エンジン ３ 気化器 １０ 冷却ファン １１ ファンケース １３ エンジン吸気用開口部 ２０ ボリュート終点部 2 engine 3 carburetor 10 cooling fan 11 fan case 13 engine intake opening 20 volute end point

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】 エンジン（２）の冷却ファン（１０）の
ファンケース（１１）のボリュート終点部（２０）の上
部であって気化器（３）の上側にエンジン吸気用開口部
（１３）を、前記冷却ファンによって生成される冷却風
の流れ方向と逆の方向に形成したことを特徴とするエン
ジン吸気取入構造。1. An engine intake opening (13) is provided above a volute end (20) of a fan case (11) of a cooling fan (10) of an engine (2) and above a carburetor (3). An engine intake air intake structure characterized by being formed in a direction opposite to a flow direction of cooling air generated by the cooling fan.
JP1992044546U 1992-06-26 1992-06-26 Engine intake intake structure Expired - Fee Related JP2571975Y2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP1992044546U JP2571975Y2 (en) 1992-06-26 1992-06-26 Engine intake intake structure
DE19934319503 DE4319503B4 (en) 1992-06-26 1993-06-11 Air-cooled internal combustion engine
SE9302187A SE507513C2 (en) 1992-06-26 1993-06-24 Device at the intake of an engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1992044546U JP2571975Y2 (en) 1992-06-26 1992-06-26 Engine intake intake structure

Publications (2)

Publication Number Publication Date
JPH064358U true JPH064358U (en) 1994-01-21
JP2571975Y2 JP2571975Y2 (en) 1998-05-20

Family

ID=12694503

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1992044546U Expired - Fee Related JP2571975Y2 (en) 1992-06-26 1992-06-26 Engine intake intake structure

Country Status (3)

Country Link
JP (1) JP2571975Y2 (en)
DE (1) DE4319503B4 (en)
SE (1) SE507513C2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007113443A (en) * 2005-10-19 2007-05-10 Tanaka Kogyo Kk Engine work machine
CN104047761A (en) * 2013-03-15 2014-09-17 安德烈·斯蒂尔股份两合公司 Internal combustion engine having an intake device

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Publication number Priority date Publication date Assignee Title
DE19631032B4 (en) * 1996-08-01 2007-07-19 Fa. Andreas Stihl Hand-guided implement with an internal combustion engine
DE29914164U1 (en) 1999-08-12 2001-01-04 Dolmar Gmbh Motorized hand tool
DE20013781U1 (en) * 2000-08-07 2001-12-20 Dolmar Gmbh Two-stroke engine
EP2241363B1 (en) 2005-10-12 2013-01-16 Kohler Co. Air cleaner assembly
US7914609B2 (en) 2007-10-29 2011-03-29 Briggs & Stratton Corporation Cyclonic air cleaner assembly
US8808432B2 (en) 2008-06-13 2014-08-19 Kohler Co. Cyclonic air cleaner

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58149560U (en) * 1982-03-31 1983-10-07 スズキ株式会社 forced air cooled engine

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Publication number Priority date Publication date Assignee Title
US3994067A (en) * 1972-11-14 1976-11-30 Mcculloch Corporation Apparatus for removing entrained matter from the inlet air of a chain saw internal combustion engine
SE444968B (en) * 1985-02-13 1986-05-20 Electrolux Ab DEVICE FOR INTAKE OF COOLING AND COMBUSTION AIR
JP2514160Y2 (en) * 1989-12-04 1996-10-16 株式会社共立 Air cleaner

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Publication number Priority date Publication date Assignee Title
JPS58149560U (en) * 1982-03-31 1983-10-07 スズキ株式会社 forced air cooled engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007113443A (en) * 2005-10-19 2007-05-10 Tanaka Kogyo Kk Engine work machine
JP4533296B2 (en) * 2005-10-19 2010-09-01 株式会社日工タナカエンジニアリング Engine working machine
CN104047761A (en) * 2013-03-15 2014-09-17 安德烈·斯蒂尔股份两合公司 Internal combustion engine having an intake device

Also Published As

Publication number Publication date
DE4319503A1 (en) 1994-01-05
JP2571975Y2 (en) 1998-05-20
SE9302187D0 (en) 1993-06-24
DE4319503B4 (en) 2007-02-22
SE9302187L (en) 1993-12-27
SE507513C2 (en) 1998-06-15

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