JP3914802B2 - How to separate engine governor and engine - Google Patents

How to separate engine governor and engine Download PDF

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Publication number
JP3914802B2
JP3914802B2 JP2002093663A JP2002093663A JP3914802B2 JP 3914802 B2 JP3914802 B2 JP 3914802B2 JP 2002093663 A JP2002093663 A JP 2002093663A JP 2002093663 A JP2002093663 A JP 2002093663A JP 3914802 B2 JP3914802 B2 JP 3914802B2
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Japan
Prior art keywords
governor
engine
fulcrum
cylinder
governor lever
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JP2003286867A (en
Inventor
学 宮▲崎▼
潔 畑浦
紀 滝井
博 三雲
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Kubota Corp
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Kubota Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、エンジンのガバナとエンジンの造り分け方法に関する。
【0002】
【従来の技術】
従来、図4に示すように、エンジンのガバナとして、本発明と同様、ガバナレバー(101)に相互に対向する両側板(102a)(102b)(103a)(103b)を設け、この両側板(102a)(102b)(103a)(103b)にそれぞれ筒嵌合孔を設け、この筒嵌合孔に支点筒(104)を嵌め、この支点筒(104)をガバナレバー軸(105)に嵌めることにより、ガバナレバー軸(105)にガバナレバー(101)を揺動自在に支持させたものがある。
しかし、この従来技術では、支点筒(104)として、両側板(102a)(102b)(103a)(103b)の筒嵌合孔にそれぞれ内嵌させる一対の短形筒を用い、ガバナレバー軸(105)の外周面に一対の短形筒からなる支点筒(104)の内周面を面接触させている。
【0003】
【発明が解決しようとする課題】
上記従来技術には、次の問題がある(図4参照)。
《問題1》 ガバナレバーの取り付け作業が煩雑になる。
支点筒(104)として、両側板(102a)(102b)(103a)(103b)の筒嵌合孔にそれぞれ内嵌させる一対の短形筒を用い、ガバナレバー軸(105)の外周面に一対の各短形筒からなる支点筒(104)の内周面を面接触させているため、一対の短形筒の芯合わせを行う必要があり、ガバナレバー(101)の取り付け作業が煩雑になる。
【0004】
上記《問題1》を解決するため、一対の短形筒とガバナレバー軸(105)との間に、ニードルベアリングを用いることも考えられる。この場合には、ニードルベアリングのガタによって、一対の短形筒の芯ずれを吸収することができる。しかし、この場合には、次の新たな《問題2》が生じる。
【0005】
《問題2》 ガバナレバー軸に圧接痕がつきやすい。
ニードルベアリングでガバナレバー軸(105)に圧接痕がつきやすい。この場合、圧接痕にニードルベアリングが嵌り込み、ガバナレバー(101)の揺動の抵抗となることがある。
【0006】
本発明の課題は、上記問題点を解決できるエンジンのガバナとエンジンの造り分け方法を提供することにある。
【0007】
【課題を解決するための手段】
主要な請求項1及び請求項4の発明特定事項は、次の通りである。
(請求項1の発明)
図1に示すように、ガバナレバー(1)に相互に対向する両側板(2a)(2b)(3a)(3b)を設け、この両側板(2a)(2b)(3a)(3b)にそれぞれ筒嵌合孔を設け、この筒嵌合孔に支点筒(4)を嵌め、この支点筒(4)をガバナレバー軸(5)に嵌めることにより、ガバナレバー軸(5)にガバナレバー(1)を揺動自在に支持させた、エンジンのガバナにおいて、
支点筒(4)として、両側板(2a)(2b)(3a)(3b)の筒嵌合孔を一連に貫通する単一の長尺筒を用い、ガバナレバー軸(5)の外周中央部、または支点筒(4)の内周中央部に、周方向に連続する凹設溝(6)を形成することにより、この凹設溝(6)の両側に、凹設溝(6)の端縁と支点筒(4)の端縁との間に位置する所定幅(L)の接触部(7)(7)を形成し、この両側一対の接触部(7)(7)で、ガバナレバー軸(5)の外周面に支点筒(4)の内周面を面接触させた、ことを特徴とするエンジンのガバナ。
【0008】
(請求項4の発明)
請求項1から請求項3のいずれかに記載したエンジンのガバナを共通部品とし、前記接触部(7)(7)の幅(L)を相違させることによって、エンジンを造り分ける、ことを特徴とするエンジンの造り分け方法。
【0009】
【発明の効果】
(請求項1の発明)
請求項1の発明は、次の効果を奏する(図1参照)。
《効果1》 ガバナレバーの取り付け作業が簡単になる。
支点筒(4)として、両側板(2a)(2b)(3a)(3b)の筒嵌合孔を一連に貫通する単一の長尺筒を用いるため、支点筒(4)の芯合わせを行う必要がなく、ガバナレバー(1)の取り付け作業が簡単になる。
【0010】
《効果2》 ガバナレバー軸に圧接痕がつくことがない。
両側一対の接触部(7)(7)では、ガバナレバー軸(5)の外周面に支点筒(4)の内周面を面接触させたため、ニードルベアリングを用いた場合のように、ガバナレバー軸(5)に圧接痕がつくことがない。
【0011】
《効果3》 両側一対の接触部の寸法調節が簡単に行える。
周方向に連続する凹設溝(6)を形成することにより、この凹設溝(6)の両側に、凹設溝(6)の端縁と支点筒(4)の端縁との間に位置する所定幅(L)の接触部(7)(7)を形成するため、凹設溝(6)の幅調節を行うだけで、両側一対の接触部(7)(7)の寸法調節を同時に行うことができ、この寸法調節が簡単に行える。
【0012】
(請求項2の発明)
請求項2の発明は、次の効果を奏する(図1参照)。
《効果4》 効果1の効果がより顕在化する。
板金製のガバナレバー(1)は、両側板(2a)(2b)(3a)(3b)の傾きが一定しにくく、従来の一対の短形筒では大きな芯ずれが生じやすく、芯合わせ手間がかかり、特にガバナレバー(1)の取り付け作業が煩雑であった。本発明では、支点筒(4)の芯合わせを行う必要がないため、芯合わせのために特に取り付け作業が煩雑であった板金製のガバナレバー(1)に適用することにより、前記《効果1》の効果がより顕在化する。
【0013】
(請求項3の発明)
請求項3の発明は、請求項1または請求項2の発明の効果に加え、次の効果を奏する(図1参照)。
《効果5》 凹設溝を潤滑油分配溝としても有効利用できる。
ガバナレバー軸(5)内の潤滑油供給通路(8)から凹設溝(6)に潤滑油を供給できるようにしたため、凹設溝(6)を接続部(7)(7)への潤滑油分配溝としても有効利用できる。
【0014】
(請求項4の発明)
請求項4の発明は、請求項1から請求項3の発明の効果に加え、次の効果を奏する(図1参照)。
《効果6》 異なる仕様のエンジンの造り分けを簡単に行うことができる。
接触部 ( )( ) の幅を相違させることによって、エンジンの回転数の整定時間やガバナレバー ( ) の支点の接触部 ( )( ) の磨耗性が相違する、異なる仕様のエンジンの造り分けを簡単に行うことができる。
【0015】
《効果7》 エンジンの製造コストが低くなる。
異なる仕様のエンジンで、ガバナを共通部品として用いることができるため、ガバナの製造コストが下がるうえ、部品管理も簡単になり、エンジンの製造コストが低くなる。
【0016】
【発明の実施の形態】
本発明の実施の形態を図面に基づいて説明する。図1から図3は本発明の実施形態に係るエンジンのガバナを説明する図で、この実施形態では、4気筒ディーゼルエンジンの燃料調量装置について説明する。
【0017】
燃料供給装置の概要は、次の通りである。
図2に示すように、燃料供給装置は、燃料噴射ポンプ(15)とメカニカルガバナ(16)とを備えている。この燃料供給装置では、ガバナレバー(1)の取り付け作業が容易に行えるようになっている。
【0018】
燃料噴射ポンプ(15)の構成は、次の通りである。
図2に示すように、燃料噴射ポンプ(15)は、列型ポンプで、前後方向にスライドする燃料調量ラック(14)を備えている。燃料調量ラック(14)の前方向の移動により燃料噴射量が減少し、後向きの移動により燃料噴射量が増加する。燃料噴射ポンプ(15)は、シリンダブロックの横壁に設けられたポンプ室(17)内に収容されている。燃料噴射ポンプ(15)の下方には燃料噴射カム軸(18)が前後方向に架設され、これで燃料噴射ポンプ(15)を駆動する。
【0019】
メカニカルガバナ(16)の構成は、次の通りである。
図2に示すように、メカニカルガバナ(16)は、ガバナウェイト(41)とガバナスリーブ(42)とガバナレバー(1)とガバナスプリング(11)とを備えている。ガバナウェイト(41)は、ポンプ室(17)の後方でポンプ室(17)と隣合うガバナ室(19)内に収容されている。ガバナウェイト(41)は、燃料噴射カム軸(18)にこれと一体回転するように取り付けられている。ガバナスリーブ(42)は、燃料噴射カム軸(18)からガバナ室(19)内に導出されたガバナ軸(20)に前後摺動自在に嵌め込まれている。ガバナレバー(1)は、第一レバー(2)と第二レバー(3)とを備え、いずれもガバナ室(19)内でに左右方向に向けて架設されたガバナレバー軸(5)に揺動自在に枢支されている。第一レバー(2)は、ガバナスプリング(11)を介して調速レバー(24)に連動連結されている。第一レバー(2)には燃料制限ボルト(25)を臨ませている。第二レバー(3)の下端部はガバナスリーブ(42)に臨ませ、上端部には連動プレート(26)を介して燃料調量ラック(14)を連動連結している。第一レバー(2)はトルクスプリング(27)を有するトルクアップ装置を備え、これを第二レバー(3)に臨ませている。
【0020】
調量伝動系の構成は、次の通りである。
図2に示すように、調量伝動系は、ガバナウェイト(41)からガバナスリーブ(42)とカバナレバー(1)と連動プレート(26)とを経て燃料調量ラック(14)に至る一連の構成部品からなる。この調量伝動系は、停止操作力低減式のもので、第二レバー(3)の上端の出力部から横向きにピン(37)を突設し、連動プレート(26)の後端の入力部に燃料調量ラック(14)のスライド方向に沿う前後方向の長孔(38)をあけ、ピン(37)を長孔(38)に嵌めて構成したスライド式連結部(9)を備えている。調量伝動系のうち、スライド式連結部(9)よりも伝動上手側の部品を上手側部品とし、伝動下手側の部品を下手側部品として、下手側部品を始動用スプリング(10)で燃料増量方向に付勢している。通常運転時には、上手側部品と下手側部品とを一体で作動させ、エンジン停止操作時には、スライド式連結部(9)をスライドさせることにより、ガバナスプリング(11)のバネ力(29)を受けている上手側部品を置き残したまま、下手側部品を燃料減量方向に作動させて、燃料調量ラック(14)を燃料無噴射位置まで移動させることができるようになっている。上手側部品は、ガバナウェイト(41)とガバナスリーブ(42)とガバナレバー(1)であり、下手側部品は、連動プレート(26)と燃料調量ラック(14)である。ガバナ室(19)内には揺動自在の停止操作レバー(28)が収容され、その揺動端は連動プレート(26)の後端に臨んでいる。
【0021】
なお、図2中の符号(35)はアイドルスプリング、(36)はダンパスプリングである。アイドルスプリング(35)は、ガバナレバー(1)の燃料減量方向の揺動を受け止める。ダンパスプリング(36)は、燃料調量ラック(14)の燃料減量方向のスライドを受け止める。アイドルスプリング(35)の圧縮途中までは、アイドルスプリング(35)でガバナレバー(1)の燃料減量方向の揺動を受け止めるだけであるが、アイドルスプリング(35)の圧縮途中から圧縮終期までは、アイドルスプリング(35)でガバナレバー(1)の燃料減量方向の揺動を受け止めるとともに、ダンパスプリング(36)で燃料調量ラック(14)の燃料減量方向のスライドを受け止める。
【0022】
ガバナレバー(1)の支持構造の詳細は、次の通りである。
図1に示すように、第一レバー(2)と第二レバー(3)とは、いずれも板金製で、折り曲げ成形により、第一レバー(2)に相互に対向する両側板(2a)(2b)を設けるとともに、第二レバー(3)にも相互に対向する両側板(3a)(3b)を設けている。これら両側板(2a)(2b)(3a)(3b)にそれぞれ筒嵌合孔を設け、この筒嵌合孔に支点筒(4)を嵌め、この支点筒(4)をガバナレバー軸(5)に嵌めることにより、ガバナレバー軸(5)に第一レバー(2)と第二レバー(3)を揺動自在に支持させている。第一レバー(2)の両側板(2a)(2b)は、支点筒(4)に圧入固定し、第二レバー(3)の両側板(3a)(3b)は、支点筒(4)に遊嵌している。第一レバー(2)の両側板(2a)(2b)と第二レバー(3)の両側板(3a)(3b)の両方を、支点筒(4)に遊嵌させてもよい。ガバナレバー軸(5)は、ガバナ室(19)に架設され、圧送オイル(20)で取付孔(21)の奥端に押し付けられ、固定されている。
【0023】
支点筒(4)として、両側板(2a)(2b)(3a)(3b)の筒嵌合孔を一連に貫通する単一の長尺筒を用い、ガバナレバー軸(5)の外周中央部に、周方向に連続する凹設溝(6)を形成することにより、この凹設溝(6)の両側に、凹設溝(6)の端縁と支点筒(4)の端縁との間に位置する所定幅(L)の接触部(7)(7)を形成している。この両側一対の接触部(7)(7)では、ガバナレバー軸(5)の外周面に支点筒(4)の内周面を面接触させている。また、ガバナレバー軸(5)内の潤滑油供給通路(8)から凹設溝(6)に潤滑油を供給できるようにしている。尚、支点筒(4)の内周中央部に、周方向に連続する凹設溝(6)を形成してもよい。
【0024】
次に、上記燃料調量装置を利用したエンジンの造り分け方法について説明する。この方法では、上記燃料調量装置を共通部品とし、前記接触部 ( )( ) の幅 ( ) を相違させることによってエンジンを造り分ける。図3は、エンジン回転数1700rpmで運転中、エンジンに外乱を加え、エンジン回転数を乱した後、これが元の1700rpmに復帰するまでの整定時間を計測したデータであり、接触部(7)(7)の幅(L)を、3mm、5mm、7mm、10mmに設定し、それぞれの整定時間を比較したものである。この計測データによれば、接触部(7)(7)の幅(L)を短くした方が整定時間(T)が短くなり、整定性が高まり、例えば発電機用エンジンに適することが分かる。また、接触部(7)(7)の幅(L)を長くした方がこの部分の面圧が下がり、磨耗が少なくなり、耐久性が高まり、例えばトラクタ用エンジンに適する。
【図面の簡単な説明】
【図1】本発明の実施形態に係る燃料調量装置を説明する図であり、図1(A)は一部切欠背面図、図1(B)は要部拡大図である。
【図2】図1の装置の縦断側面図である。
【図3】図1の装置におけるガバナレバーの支点の接触部の幅と整定時間の関係を示すデータであり、図3(A)は3mm、図3(B)は5mm、図3(C)は7mm、図3(D)は10mmの場合のデータである。
【図4】従来技術に係る燃料調量装置を説明する図であり、図4(A)は一部切欠背面図、図4(B)は要部拡大図である。
【符号の説明】
(1)…ガバナレバー、(2)…第一レバー、(2a)(2b)…両側板、(3)…第二レバー、(3a)(3b)…両側板、(4)…支点筒、(5)…ガバナレバー軸、(6)…凹設溝、(7)…接触部、(L)…所定幅、(8)…潤滑油供給通路。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an engine governor and a method for making an engine separately.
[0002]
[Prior art]
Conventionally, as shown in FIG. 4, as the engine governor, both side plates (102a) (102b) (103a) (103b) facing the governor lever (101) are provided as in the present invention. ) (102b) (103a) (103b) are provided with respective cylinder fitting holes, the fulcrum cylinder (104) is fitted into the cylinder fitting holes, and the fulcrum cylinder (104) is fitted to the governor lever shaft (105). There is one in which a governor lever (101) is swingably supported on a governor lever shaft (105).
However, in this prior art, as the fulcrum cylinder (104), a pair of short cylinders that are respectively fitted in the cylinder fitting holes of the side plates (102a) (102b) (103a) (103b) are used, and the governor lever shaft (105 ) Is in surface contact with the inner peripheral surface of the fulcrum cylinder (104) made of a pair of short cylinders.
[0003]
[Problems to be solved by the invention]
The above prior art has the following problems (see FIG. 4).
<< Problem 1 >> Governor lever installation work becomes complicated.
As the fulcrum cylinder (104), a pair of short cylinders fitted in the cylinder fitting holes of the side plates (102a) (102b) (103a) (103b) are used, and a pair of outer cylinders (105) are provided on the outer peripheral surface of the governor lever shaft (105). Since the inner peripheral surface of the fulcrum cylinder (104) made up of each short cylinder is brought into surface contact, it is necessary to align the pair of short cylinders, and the mounting operation of the governor lever (101) becomes complicated.
[0004]
In order to solve the above << Problem 1 >>, it is also conceivable to use a needle bearing between the pair of short cylinders and the governor lever shaft (105). In this case, the misalignment of the pair of short cylinders can be absorbed by the backlash of the needle bearing. However, in this case, the following new << Problem 2 >> occurs.
[0005]
<Problem 2> The governor lever shaft is likely to have pressure contact marks.
The needle bearing is likely to cause pressure marks on the governor lever shaft (105). In this case, the needle bearing may be fitted into the press-contact mark, which may cause a swinging resistance of the governor lever (101).
[0006]
An object of the present invention is to provide an engine governor that can solve the above-described problems and a method of making the engine separately.
[0007]
[Means for Solving the Problems]
The invention specific matters of the main claims 1 and 4 are as follows.
(Invention of Claim 1)
As shown in FIG. 1, both side plates (2a), (2b), (3a), and (3b) facing each other are provided on the governor lever (1), and the side plates (2a), (2b), (3a), and (3b) are respectively provided. A tube fitting hole is provided, and the fulcrum tube (4) is fitted into the tube fitting hole, and the fulcrum tube (4) is fitted to the governor lever shaft (5), whereby the governor lever (1) is swung to the governor lever shaft (5). In the governor of the engine that is supported freely,
As the fulcrum tube (4), a single long tube that passes through the tube fitting holes of both side plates (2a), (2b), (3a), and (3b) in series is used, and the central portion of the outer periphery of the governor lever shaft (5), Alternatively, by forming a concave groove (6) continuous in the circumferential direction at the center of the inner periphery of the fulcrum cylinder (4), the edge of the concave groove (6) is formed on both sides of the concave groove (6). A contact portion (7), (7) of a predetermined width (L) located between the fulcrum cylinder (4) and the edge of the fulcrum tube (4) is formed, and the governor lever shaft ( An engine governor characterized in that the outer peripheral surface of 5) is brought into surface contact with the inner peripheral surface of the fulcrum tube (4).
[0008]
(Invention of Claim 4)
Characterized governor engine according claim 1 to claim 3 as a common component, by different width (L) of said contact portion (7) (7), separating build engine, that How to make engines.
[0009]
【The invention's effect】
(Invention of Claim 1)
The invention of claim 1 has the following effects (see FIG. 1).
<Effect 1> The governor lever can be easily attached.
As the fulcrum cylinder (4), a single long cylinder that passes through the cylinder fitting holes of the side plates (2a) (2b) (3a) (3b) in series is used, so that the fulcrum cylinder (4) is aligned. There is no need to do so, and the governor lever (1) can be easily attached.
[0010]
<Effect 2> There is no pressure contact mark on the governor lever shaft.
In the pair of contact portions (7) and (7) on both sides, the inner peripheral surface of the fulcrum cylinder (4) is brought into surface contact with the outer peripheral surface of the governor lever shaft (5), so that the governor lever shaft ( 5) There is no impression mark.
[0011]
<< Effect 3 >> It is possible to easily adjust the dimensions of the pair of contact portions on both sides.
By forming a concave groove (6) continuous in the circumferential direction, on both sides of the concave groove (6), between the edge of the concave groove (6) and the edge of the fulcrum tube (4). In order to form the contact portions (7) and (7) having a predetermined width (L), the dimensions of the pair of contact portions (7) and (7) on both sides can be adjusted only by adjusting the width of the recessed groove (6). This can be done at the same time, and this dimensional adjustment is easy.
[0012]
(Invention of Claim 2)
The invention of claim 2 has the following effects (see FIG. 1).
<< Effect 4 >> The effect 1 is more obvious.
In the sheet metal governor lever (1), the inclination of both side plates (2a), (2b), (3a) and (3b) is difficult to be constant, and a large amount of misalignment is likely to occur in the conventional pair of short cylinders, which takes time and effort. In particular, the mounting operation of the governor lever (1) was complicated. In the present invention, since it is not necessary to align the fulcrum cylinder (4), the above-mentioned << Effect 1 >> is achieved by applying it to the sheet metal governor lever (1), which has been particularly troublesome for the alignment. The effect of becomes more obvious.
[0013]
(Invention of Claim 3)
The invention of claim 3 has the following effect in addition to the effect of the invention of claim 1 or claim 2 (see FIG. 1).
<Effect 5> The recessed groove can be effectively used as a lubricating oil distribution groove.
Since the lubricating oil can be supplied to the recessed groove (6) from the lubricating oil supply passage (8) in the governor lever shaft (5), the recessed groove (6) is lubricated to the connecting portions (7) and (7). It can also be used effectively as a distribution groove.
[0014]
(Invention of Claim 4)
The invention of claim 4 has the following effects in addition to the effects of the inventions of claims 1 to 3 (see FIG. 1).
<Effect 6> Engines with different specifications can be easily created.
By different width of the contact portion (7) (7), the contact portion of the fulcrum of the rotational speed of the engine settling time and the governor lever (1) abrasion resistance (7) (7) are different, with different specifications engine Can be easily separated.
[0015]
<Effect 7> The manufacturing cost of the engine is reduced.
Since the governor can be used as a common part in engines having different specifications, the manufacturing cost of the governor is reduced, the parts management is simplified, and the manufacturing cost of the engine is reduced.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 3 are views for explaining an engine governor according to an embodiment of the present invention. In this embodiment, a fuel metering device for a four-cylinder diesel engine will be described.
[0017]
The outline of the fuel supply device is as follows.
As shown in FIG. 2, the fuel supply apparatus includes a fuel injection pump (15) and a mechanical governor (16). In this fuel supply device, the governor lever (1) can be easily attached.
[0018]
The structure of the fuel injection pump (15) is as follows.
As shown in FIG. 2, the fuel injection pump (15) is a row type pump and includes a fuel metering rack (14) that slides in the front-rear direction. The fuel injection amount is decreased by the forward movement of the fuel metering rack (14), and the fuel injection amount is increased by the backward movement. The fuel injection pump (15) is accommodated in a pump chamber (17) provided on the lateral wall of the cylinder block. Below the fuel injection pump (15), a fuel injection cam shaft (18) is installed in the front-rear direction to drive the fuel injection pump (15).
[0019]
The configuration of the mechanical governor (16) is as follows.
As shown in FIG. 2, the mechanical governor (16) includes a governor weight (41), a governor sleeve (42), a governor lever (1), and a governor spring (11). The governor weight (41) is accommodated in the governor chamber (19) adjacent to the pump chamber (17) behind the pump chamber (17). The governor weight (41) is attached to the fuel injection cam shaft (18) so as to rotate integrally therewith. The governor sleeve (42) is slidably fitted in the governor shaft (20) led out from the fuel injection cam shaft (18) into the governor chamber (19). The governor lever (1) includes a first lever (2) and a second lever (3), both of which are swingable on a governor lever shaft (5) installed in the governor chamber (19) in the left-right direction. It is pivotally supported by. The first lever (2) is interlocked with the governing lever (24) via a governor spring (11). The first lever (2) is exposed to a fuel limiting bolt (25). The lower end of the second lever (3) faces the governor sleeve (42), and the fuel metering rack (14) is linked to the upper end via an interlocking plate (26). The first lever (2) includes a torque-up device having a torque spring (27), which faces the second lever (3).
[0020]
The configuration of the metering transmission system is as follows.
As shown in FIG. 2, the metering transmission system is a series of structures from the governor weight (41) to the fuel metering rack (14) through the governor sleeve (42), the governor lever (1), and the interlocking plate (26). It consists of parts. This metering transmission system is of a type that reduces the stop operation force, and a pin (37) is projected laterally from the output part at the upper end of the second lever (3), and the input part at the rear end of the interlocking plate (26). The fuel metering rack (14) is provided with a sliding connection portion (9) having a long hole (38) in the front-rear direction along the sliding direction and a pin (37) fitted in the long hole (38). . Of the metering transmission system, the parts on the upper side of the transmission from the sliding connection (9) are the upper parts, the parts on the lower side of the transmission are the lower parts, and the lower parts are fueled by the starting spring (10). Energizing in the direction of increasing. During normal operation, the upper part and lower part are actuated together, and when the engine is stopped, the sliding connection (9) is slid to receive the spring force (29) of the governor spring (11). The left side part is left behind and the lower side part is operated in the fuel decreasing direction, so that the fuel metering rack (14) can be moved to the non-fuel injection position. The upper parts are the governor weight (41), the governor sleeve (42), and the governor lever (1), and the lower parts are the interlocking plate (26) and the fuel metering rack (14). A swingable stop operation lever (28) is accommodated in the governor chamber (19), and its swing end faces the rear end of the interlocking plate (26).
[0021]
In FIG. 2, reference numeral (35) denotes an idle spring, and (36) denotes a damper spring. The idle spring (35) receives the swing of the governor lever (1) in the fuel decreasing direction. The damper spring (36) receives the slide of the fuel metering rack (14) in the fuel decreasing direction. Until the middle of compression of the idle spring (35), the idle spring (35) only receives the oscillation of the governor lever (1) in the direction of fuel reduction. The spring (35) receives the swing of the governor lever (1) in the fuel decreasing direction, and the damper spring (36) receives the sliding of the fuel metering rack (14) in the fuel decreasing direction.
[0022]
The details of the support structure of the governor lever (1) are as follows.
As shown in FIG. 1, both the first lever (2) and the second lever (3) are made of sheet metal, and both side plates (2a) (2a) facing each other to the first lever (2) by bending. 2b), and the second lever (3) is also provided with opposite side plates (3a) and (3b). Each side plate (2a) (2b) (3a) (3b) is provided with a tube fitting hole, and a fulcrum tube (4) is fitted into this tube fitting hole, and this fulcrum tube (4) is attached to the governor lever shaft (5). The first lever (2) and the second lever (3) are swingably supported by the governor lever shaft (5). Both side plates (2a) and (2b) of the first lever (2) are press-fitted and fixed to the fulcrum tube (4), and both side plates (3a) and (3b) of the second lever (3) are fixed to the fulcrum tube (4). It is loosely fitted. Both side plates (2a) (2b) of the first lever (2) and both side plates (3a) (3b) of the second lever (3) may be loosely fitted to the fulcrum tube (4). The governor lever shaft (5) is installed in the governor chamber (19) and is pressed against the inner end of the mounting hole (21) by the pressure feed oil (20) and fixed.
[0023]
As the fulcrum tube (4), a single long tube that passes through the tube fitting holes of the side plates (2a) (2b) (3a) (3b) in series is used. By forming a concave groove (6) that is continuous in the circumferential direction, between the edge of the concave groove (6) and the edge of the fulcrum cylinder (4) on both sides of the concave groove (6) The contact portions (7) and (7) having a predetermined width (L) located in the region are formed. In the pair of contact portions (7) and (7) on both sides, the inner peripheral surface of the fulcrum tube (4) is brought into surface contact with the outer peripheral surface of the governor lever shaft (5). The lubricating oil can be supplied from the lubricating oil supply passage (8) in the governor lever shaft (5) to the recessed groove (6). In addition, you may form the recessed groove | channel (6) continuous in the circumferential direction in the inner peripheral center part of the fulcrum cylinder (4).
[0024]
Next, an engine manufacturing method using the fuel metering device will be described. In this method, the fuel metering device is used as a common part, and the engine is separately manufactured by making the widths ( L ) of the contact portions ( 7 ) and ( 7 ) different. FIG. 3 shows data obtained by measuring the settling time until the engine speed was restored to the original 1700 rpm after the engine speed was disturbed during operation at an engine speed of 1700 rpm and the engine speed was disturbed. The width (L) of 7) is set to 3 mm, 5 mm, 7 mm, and 10 mm, and the settling times are compared. According to this measurement data, it can be seen that shortening the width (L) of the contact portions (7) and (7) shortens the settling time (T) and improves the settling property, and is suitable for , for example, a generator engine. Further, when the width (L) of the contact portions (7) and (7) is increased, the surface pressure of this portion is reduced, wear is reduced, durability is increased, and it is suitable, for example , for a tractor engine.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining a fuel metering device according to an embodiment of the present invention, in which FIG. 1 (A) is a partially cutaway rear view, and FIG. 1 (B) is an enlarged view of a main part.
FIG. 2 is a longitudinal side view of the apparatus of FIG.
FIG. 3 is data showing the relationship between the width of the contact portion of the fulcrum of the governor lever and the settling time in the apparatus of FIG. 1, FIG. 3 (A) is 3 mm, FIG. 3 (B) is 5 mm, and FIG. 7 mm and FIG. 3D are data in the case of 10 mm.
4A and 4B are views for explaining a fuel metering device according to the prior art, in which FIG. 4A is a partially cutaway rear view, and FIG. 4B is an enlarged view of a main part.
[Explanation of symbols]
(1) ... governor lever, (2) ... first lever, (2a) (2b) ... both side plates, (3) ... second lever, (3a) (3b) ... both side plates, (4) ... fulcrum cylinder, ( 5) Governor lever shaft, (6) Recessed groove, (7) Contact portion, (L) Predetermined width, (8) Lubricating oil supply passage.

Claims (4)

ガバナレバー(1)に相互に対向する両側板(2a)(2b)(3a)(3b)を設け、この両側板(2a)(2b)(3a)(3b)にそれぞれ筒嵌合孔を設け、この筒嵌合孔に支点筒(4)を嵌め、この支点筒(4)をガバナレバー軸(5)に嵌めることにより、ガバナレバー軸(5)にガバナレバー(1)を揺動自在に支持させた、エンジンのガバナにおいて、
支点筒(4)として、両側板(2a)(2b)(3a)(3b)の筒嵌合孔を一連に貫通する単一の長尺筒を用い、ガバナレバー軸(5)の外周中央部、または支点筒(4)の内周中央部に、周方向に連続する凹設溝(6)を形成することにより、この凹設溝(6)の両側に、凹設溝(6)の端縁と支点筒(4)の端縁との間に位置する所定幅(L)の接触部(7)(7)を形成し、この両側一対の接触部(7)(7)で、ガバナレバー軸(5)の外周面に支点筒(4)の内周面を面接触させた、ことを特徴とするエンジンのガバナ。
Both side plates (2a), (2b), (3a), and (3b) facing the governor lever (1) are provided, and cylinder fitting holes are provided in the side plates (2a), (2b), (3a), and (3b), respectively. The fulcrum cylinder (4) is fitted into the cylinder fitting hole, and the fulcrum cylinder (4) is fitted to the governor lever shaft (5), so that the governor lever shaft (5) is supported in a swingable manner. In the engine governor,
As the fulcrum tube (4), a single long tube that passes through the tube fitting holes of both side plates (2a), (2b), (3a), and (3b) in series is used, and the central portion of the outer periphery of the governor lever shaft (5), Alternatively, by forming a concave groove (6) continuous in the circumferential direction at the center of the inner periphery of the fulcrum cylinder (4), the edge of the concave groove (6) is formed on both sides of the concave groove (6). A contact portion (7), (7) of a predetermined width (L) located between the fulcrum cylinder (4) and the edge of the fulcrum tube (4) is formed, and the governor lever shaft ( An engine governor characterized in that the outer peripheral surface of 5) is brought into surface contact with the inner peripheral surface of the fulcrum tube (4).
請求項1に記載したエンジンのガバナにおいて、
ガバナレバー(1)が板金製であるものに適用する、ことを特徴とするエンジンのガバナ。
The engine governor according to claim 1, wherein:
An governor for an engine, characterized in that the governor lever (1) is applied to a sheet metal.
請求項1または請求項2のいずれかに記載したエンジンのガバナにおいて、
ガバナレバー軸(5)内の潤滑油供給通路(8)から凹設溝(6)に潤滑油を供給できるようにした、ことを特徴とするエンジンのガバナ。
In the engine governor according to claim 1 or 2,
An engine governor characterized in that lubricating oil can be supplied from a lubricating oil supply passage (8) in the governor lever shaft (5) to the recessed groove (6).
請求項1から請求項3のいずれかに記載したエンジンのガバナを共通部品とし、前記接触部(7)(7)の幅(L)を相違させることによって、エンジンを造り分ける、ことを特徴とするエンジンの造り分け方法。Characterized governor engine according claim 1 to claim 3 as a common component, by different width (L) of said contact portion (7) (7), separating build engine, that How to make engines.
JP2002093663A 2002-03-29 2002-03-29 How to separate engine governor and engine Expired - Fee Related JP3914802B2 (en)

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JP5135256B2 (en) * 2009-02-25 2013-02-06 株式会社クボタ Engine mechanical governor
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