JPH0676631U - Foreign matter adhesion prevention device for the intake bore of diesel engine - Google Patents
Foreign matter adhesion prevention device for the intake bore of diesel engineInfo
- Publication number
- JPH0676631U JPH0676631U JP1795693U JP1795693U JPH0676631U JP H0676631 U JPH0676631 U JP H0676631U JP 1795693 U JP1795693 U JP 1795693U JP 1795693 U JP1795693 U JP 1795693U JP H0676631 U JPH0676631 U JP H0676631U
- Authority
- JP
- Japan
- Prior art keywords
- intake
- throttle valve
- intake throttle
- bore
- foreign matter
- 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.)
- Pending
Links
Landscapes
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
(57)【要約】
【目的】 ディーゼルエンジン用吸気ボアにおける内周
面への粘着物質等の付着を防止すると共に付着した粘着
物質等を積極的に剥離除去する。
【構成】 吸気絞り弁８に通気穴９を形成する。吸気絞
り弁８の下流側に遮へい板１０を固着する。遮へい板１
０には、通気穴９の直下に位置して適宜間隙を有して離
間する空気当り部１０ｂを形成し、通気穴９から流入し
た空気を該空気当り部１０ｂによって外方へ変向させ
る。
(57) [Summary] [Purpose] To prevent sticky substances from adhering to the inner peripheral surface of the intake bore of a diesel engine and to positively remove the sticky substances that have adhered. [Structure] A vent hole 9 is formed in the intake throttle valve 8. A shield plate 10 is fixed to the downstream side of the intake throttle valve 8. Shield 1
At 0, an air contact portion 10b located immediately below the ventilation hole 9 and having an appropriate gap and separated is formed, and the air flowing in from the ventilation hole 9 is deflected outward by the air contact portion 10b.
Description
【０００１】[0001]
本考案はディーゼルエンジン用吸気ボアの異物付着防止装置に関する。 The present invention relates to a foreign matter adhesion prevention device for an intake bore of a diesel engine.
【０００２】[0002]
従来、ディーゼルエンジンの吸気ボア内に設置される吸気絞り弁として、図３ 及び図４に示すように、吸気ボア１に回転可能に貫通設置したシャフト２に吸気 絞り弁３を固着し、該吸気絞り弁３の外周近傍に表裏に貫通する通気穴４を形成 し、該通気穴４により吸気絞り弁１の全閉時に若干の吸入空気量を確保するよう にしたものがある。 Conventionally, as an intake throttle valve installed in the intake bore of a diesel engine, as shown in FIGS. 3 and 4, the intake throttle valve 3 is fixedly attached to a shaft 2 rotatably penetratingly installed in an intake bore 1. There is a ventilating hole 4 formed in the vicinity of the outer periphery of the throttle valve 3 so as to penetrate the throttle valve 3 so as to secure a slight intake air amount when the intake throttle valve 1 is fully closed.
【０００３】 また、ディーゼルエンジン用ではなく、ガソリンエンジン用の吸気弁として図 ５に示すように、吸気弁５の一部に通気穴６を形成し、その下流側に閉方向に付 勢された開閉板７を設け、該開閉板７を車両減速時にその高負圧によって開作動 するようにしたものがある（実開昭５６−１５４５３８号公報）。Further, as shown in FIG. 5 as an intake valve for a gasoline engine, not for a diesel engine, a ventilation hole 6 is formed in a part of the intake valve 5 and is urged in the closing direction downstream thereof. There is one in which an opening / closing plate 7 is provided, and the opening / closing plate 7 is opened by a high negative pressure when the vehicle is decelerated (Japanese Utility Model Laid-Open No. 56-154538).
【０００４】[0004]
ディーゼルエンジンにおいては、その使用燃料の特性から、この燃料がエンジ ン内で燃焼されると多量のカーボン等の粘着物質が生成され、これがエンジンか らの吹き返しによって上記のような吸気絞り弁３を有する吸気ボア１内に流れ込 み、その吸気ボア１の内周面に付着する。 In a diesel engine, due to the characteristics of the fuel used, when this fuel is burned in the engine, a large amount of sticky substances such as carbon are generated, and this is blown back from the engine to cause the intake throttle valve 3 as described above to flow. It flows into the intake bore 1 that it has and adheres to the inner peripheral surface of the intake bore 1.
【０００５】 そのため、上記図３及び図４に示す従来の吸気絞り弁３においては、その全閉 時に、その吸気絞り弁３の外周端面と吸気ボア１の内周面とが上記粘着物質によ って接着し、この全閉状態からのアクセル操作時に踏力が重くなり、アクセル操 作性が悪くなる。尚、通気穴４は単なる吸入空気量を確保するためのものであり 、その通気穴４から流入した空気は矢印Ａのように流れ、吸気ボア１の内周面に 付着した粘着物質、特に吸気絞り弁３の全閉時におけるその外周端面が位置する 部分の粘着物質を積極的に剥離除去する作用はない。Therefore, in the conventional intake throttle valve 3 shown in FIGS. 3 and 4, the outer peripheral end surface of the intake throttle valve 3 and the inner peripheral surface of the intake bore 1 are made of the adhesive substance when fully closed. When the accelerator is operated from this fully closed state, the pedal force becomes heavy and the accelerator operability deteriorates. The ventilation hole 4 is for merely ensuring the amount of intake air, and the air flowing in from the ventilation hole 4 flows as shown by the arrow A, and the sticky substance attached to the inner peripheral surface of the intake bore 1, particularly the intake air. When the throttle valve 3 is fully closed, there is no action of actively peeling and removing the sticky substance in the portion where the outer peripheral end face is located.
【０００６】 また、上記図５に示すものを仮りにディーゼルエンジンの吸気絞り弁として使 用したとしても、開閉板７が高負圧時のみ開作動する構造であるため、上記の粘 着物質の剥離除去効果は期待できない。Further, even if the one shown in FIG. 5 is used as an intake throttle valve of a diesel engine, since the opening / closing plate 7 has a structure that opens only at a high negative pressure, The peeling removal effect cannot be expected.
【０００７】 そこで本考案は、上記の粘着物質等の異物が吸気ボアに付着しないように、ま た付着した場合はこれを積極的に剥離除去できる装置を提案し、吸気絞り弁の全 閉からのアクセル操作性を改善することを目的とするものである。Therefore, the present invention proposes a device that prevents foreign matter such as the above-mentioned sticky substance from adhering to the intake bore, and positively removes and removes it when it adheres. It is intended to improve the accelerator operability of.
【０００８】[0008]
本考案は前記の課題を達成するために、吸気ボア内に吸気絞り弁を開閉可能に 備え、該吸気絞り弁の外周近傍に表裏方向に貫通する通気穴を形成したものにお いて、上記吸気絞り弁（８）の下流側面に遮へい板（１０）を固設し、該遮へい 板（１０）には、上記通気穴（９）の直下において常時吸気絞り弁（８）から離 間し、かつ通気穴（９）から流入する空気を外方へ変向する空気当り部（１０ｂ ）を設けたことを特徴とするものである。 In order to achieve the above object, the present invention provides an intake throttle valve that can be opened and closed in an intake bore, and has a vent hole that penetrates in the front and back direction near the outer periphery of the intake throttle valve. A shield plate (10) is fixedly provided on the downstream side surface of the throttle valve (8), and the shield plate (10) is always separated from the intake throttle valve (8) immediately below the ventilation hole (9), and The air contact portion (10b) for diverting the air flowing in from the ventilation hole (9) to the outside is provided.
【０００９】[0009]
吸気ボア（１）に流入した空気は、吸気絞り弁（８）の通気穴（９）を流通し 、遮へい板（１０）に当って外方へ変向される。この変向された空気は、吸気ボ ア（１）の内周面に衝突して下流へ流れ、その流れによって粘着物質等の異物の 吸気ボア（１）への付着を防止し、また衝突力によって付着した異物を積極的に 剥離除去する作用をする。 The air flowing into the intake bore (1) flows through the ventilation hole (9) of the intake throttle valve (8), hits the shield plate (10), and is diverted outward. This deflected air collides with the inner peripheral surface of the intake bore (1) and flows downstream, which prevents foreign matter such as sticky substances from adhering to the intake bore (1), and also the collision force. It acts to positively remove and remove foreign matter attached by.
【００１０】[0010]
次に図１及び図２に示す本考案の実施例について説明する。 １は吸気ボアで、これにシャフト２が回転可能に貫通設置されており、このシ ャフト２は周知の機構を介してアクセルペダルにより回転制御される。 Next, an embodiment of the present invention shown in FIGS. 1 and 2 will be described. Reference numeral 1 denotes an intake bore, through which a shaft 2 is rotatably installed, and the shaft 2 is rotationally controlled by an accelerator pedal through a known mechanism.
【００１１】 ８は上記シャフト２に固着された吸気絞り弁で、その外周近傍に位置して通気 穴９が表裏方向に貫通形成されている。 該通気穴９は、シャフト２部を除く吸気絞り弁８の全周に亘って多数個所定間 隔で形成され、かつその１個の穴の開口面積は所定値に定められている。尚、該 穴９は、図面では円形にしたが角形等の異形穴でもよい。Reference numeral 8 is an intake throttle valve fixed to the shaft 2, and a ventilation hole 9 is formed near the outer periphery of the intake throttle valve so as to penetrate therethrough in the front and back directions. A large number of the ventilation holes 9 are formed at predetermined intervals over the entire circumference of the intake throttle valve 8 except the shaft 2, and the opening area of one hole is set to a predetermined value. Although the hole 9 is circular in the drawing, it may be a modified hole such as a square.
【００１２】 １０は遮へい板で、その基部１０ａが上記吸気絞り弁８の裏面、すなわち下流 側面にリベット１１により固着されている。 該遮へい板１０の外周部は吸気絞り弁８の裏面との間の若干の隙間Ｄ1 を有す るように基部１０ａから折曲して形成され、この外周部が空気当り部１０ｂとな っている。Reference numeral 10 denotes a shield plate, the base portion 10 a of which is fixed to the back surface of the intake throttle valve 8, that is, the downstream side surface thereof by a rivet 11. The outer peripheral portion of the shielding soldiers plate 10 is formed by bending from the base portion 10a in so that the Yusuke slight clearance D 1 of the between the rear surface of the intake throttle valve 8, the outer peripheral portion Tsu Do air per unit 10b ing.
【００１３】 該空気当り部１０ｂは、上記各通気穴９の直下に位置するように、図２に示す 如く、各通気穴９の形成位置に沿った円弧状に形成されている。更に該空気当り 部１０ｂは吸気絞り弁８の裏面と並行する板状に形成され、通気穴９からの流入 空気を外方へ変向するようになっている。As shown in FIG. 2, the air contact portion 10 b is formed in an arc shape along the formation position of each vent hole 9 so as to be located directly below each vent hole 9. Further, the air contact portion 10b is formed in a plate shape parallel to the back surface of the intake throttle valve 8 so as to redirect the inflow air from the ventilation hole 9 to the outside.
【００１４】 かつその外周端面１０ｃは吸気絞り弁８の外周端面よりも内側へ位置するよう に短径に形成され、吸気絞り弁８の全閉時に、その外周端面１０ｃと吸気ボア１ の内周面との間の空隙Ｄ2 が生じるようになっている。The outer peripheral end surface 10 c is formed with a short diameter so as to be located inward of the outer peripheral end surface of the intake throttle valve 8, and when the intake throttle valve 8 is fully closed, the outer peripheral end surface 10 c and the inner peripheral surface of the intake bore 1. A gap D 2 between the surface and the surface is created.
【００１５】 以上のようであるから、エンジンの駆動中に吸気ボア１内に吸入された空気の 一部は図１の矢印Ｂで示すように通気穴９を流通し、その流通した空気は遮へい 板１０の空気当り部１０ｂに当って外方、すなわち吸気ボア１の内周面側方向へ 強制的に変更され、その吸気ボア１の内周面に衝突し、間隙Ｄ2 からエンジン側 （下流側）へ流れる。As described above, part of the air taken into the intake bore 1 while the engine is being driven circulates through the ventilation hole 9 as indicated by arrow B in FIG. 1, and the circulated air is shielded. The air contact portion 10b of the plate 10 is forcibly changed to the outside, that is, toward the inner peripheral surface of the intake bore 1, and collides with the inner peripheral surface of the intake bore 1, and from the gap D 2 to the engine side (downstream). Side).
【００１６】 この空気の変向は、吸気絞り弁８の略半開状態から全閉状態に亘って行われ、 全閉に近ずく程、吸気ボア１の内周面に対する空気の衝突力は大きくなる。 そのため、この空気の流れによって粘着物質等の異物が吸気ボア１の内周面に 付着することが妨げられ、また、吸気ボア１の内周面に粘着物質等の異物が付着 した場合には、上記の空気の衝突力により剥離除去され、特に吸気絞り弁８の全 閉近傍においては、強い空気衝撃力によって異物の付着防止と剥離効果が良くな る。The air is diverted from the substantially half-opened state to the fully-closed state of the intake throttle valve 8, and the closer to the fully closed state, the greater the collision force of the air with the inner peripheral surface of the intake bore 1. . Therefore, this air flow prevents foreign matter such as sticky substances from adhering to the inner peripheral surface of the intake bore 1, and when foreign matter such as sticky substances adheres to the inner peripheral surface of the intake bore 1, Peeling and removal is performed by the above-mentioned air collision force, and especially near the fully closed state of the intake throttle valve 8, the strong air impact force improves the foreign matter adhesion prevention and peeling effect.
【００１７】 このように粘着物質等の異物の付着防止と剥離除去により、吸気絞り弁８の全 閉状態での吸気ボア１に対する接着力が低減され、この全閉状態からのアクセル 操作がスムースに行える。In this way, by preventing adhesion and removal of foreign matter such as an adhesive substance, the adhesive force to the intake bore 1 in the fully closed state of the intake throttle valve 8 is reduced, and the accelerator operation from this fully closed state is smooth. You can do it.
【００１８】 尚、通気穴９は、上記実施例においては吸気絞り弁９の全周に亘って形成した が、必要箇所に部分的に形成してもよく、また、その個数、形状も必要に設定し てもよい。Although the ventilation holes 9 are formed over the entire circumference of the intake throttle valve 9 in the above-mentioned embodiment, they may be formed partially at necessary places, and the number and shape thereof are also required. You may set it.
【００１９】[0019]
以上のように本考案によれば、ディーゼルエンジンから吹き返されて吸気ボア の内周面、特に吸気絞り弁の全閉位置近傍において、粘着物質等の異物の付着防 止と剥離除去作用によって、吸気絞り弁の全閉状態での吸気ボアの内周面に対す る接着力が低減され、この全閉状態からのアクセルペダル操作がスムーズに行え 、アクセル操作性を改善できる。 As described above, according to the present invention, the intake air is blown back from the diesel engine and is prevented from adhering to and removing foreign matter such as an adhesive substance on the inner peripheral surface of the intake bore, especially near the fully closed position of the intake throttle valve. The adhesive force to the inner peripheral surface of the intake bore when the throttle valve is fully closed is reduced, and the accelerator pedal can be operated smoothly from this fully closed state, improving accelerator operability.
【図面の簡単な説明】[Brief description of drawings]
【図１】 本考案の実施例を示す縦断面図。FIG. 1 is a vertical sectional view showing an embodiment of the present invention.
【図２】 同底面図。FIG. 2 is a bottom view of the same.
【図３】 従来構造を示す縦断面図。FIG. 3 is a vertical sectional view showing a conventional structure.
【図４】 同底面図。FIG. 4 is a bottom view of the same.
【図５】 従来構造の他の例を示す縦断面図。FIG. 5 is a vertical cross-sectional view showing another example of the conventional structure.
１ 吸気ボア ８ 吸気絞り弁 ９ 通気穴 １０ 遮へい板 １０ｂ 空気当り部 1 intake bore 8 intake throttle valve 9 vent hole 10 shield plate 10b air contact part
Claims (1)
え、該吸気絞り弁の外周近傍に表裏方向に貫通する通気
穴を形成したものにおいて、上記吸気絞り弁（８）の下
流側面に遮へい板（１０）を固設し、該遮へい板（１
０）には、上記通気穴（９）の直下において常時吸気絞
り弁（８）から離間し、かつ通気穴（９）から流入する
空気を外方へ変向する空気当り部（１０ｂ）を設けたこ
とを特徴とするディーゼルエンジン用吸気ボアの異物付
着防止装置。1. An intake throttle valve is provided in an intake bore so as to be openable and closable, and a ventilation hole is formed in the vicinity of the outer periphery of the intake throttle valve so as to penetrate in the front-back direction. The intake throttle valve (8) has a downstream side surface. The shield plate (10) is fixed, and the shield plate (1
0) is provided with an air contact portion (10b) which is always separated from the intake throttle valve (8) immediately below the ventilation hole (9) and which redirects the air flowing in from the ventilation hole (9) to the outside. A foreign matter adhesion preventive device for a diesel engine intake bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1795693U JPH0676631U (en) | 1993-04-09 | 1993-04-09 | Foreign matter adhesion prevention device for the intake bore of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1795693U JPH0676631U (en) | 1993-04-09 | 1993-04-09 | Foreign matter adhesion prevention device for the intake bore of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0676631U true JPH0676631U (en) | 1994-10-28 |
Family
ID=11958208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1795693U Pending JPH0676631U (en) | 1993-04-09 | 1993-04-09 | Foreign matter adhesion prevention device for the intake bore of diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0676631U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100398153B1 (en) * | 2000-12-29 | 2003-09-19 | 현대자동차주식회사 | Throttle valve |
| JP2021042677A (en) * | 2019-09-06 | 2021-03-18 | 日野自動車株式会社 | Intake manifold |
-
1993
- 1993-04-09 JP JP1795693U patent/JPH0676631U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100398153B1 (en) * | 2000-12-29 | 2003-09-19 | 현대자동차주식회사 | Throttle valve |
| JP2021042677A (en) * | 2019-09-06 | 2021-03-18 | 日野自動車株式会社 | Intake manifold |
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