JP2004108157A - Hydraulic regulating device for forced lubrication device in engine - Google Patents
Hydraulic regulating device for forced lubrication device in engine Download PDFInfo
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【０００１】
【発明の属する技術分野】
本発明は、エンジンの強制潤滑装置の油圧調整装置に関する。
【０００２】
【前提構成】
本発明のエンジンの強制潤滑装置の油圧調整装置は、例えば図１・図２（本発明）、または図５（従来技術）に示すように、次の前提構成を有するものを対象とする。
【０００３】
図１は本発明のエンジンの強制潤滑装置の油圧調整装置の実施形態１を示す、水冷縦形ディーゼルエンジンの強制潤滑装置の潤滑系統図である。図２は図１のＩＩ部の拡大縦断正面図である。
図５は従来技術を示す水冷縦形ディーゼルエンジンの強制潤滑装置の潤滑系統図である。
【０００４】
エンジンの強制潤滑装置の油溜め（１）内の潤滑油を、潤滑ポンプ（２）で圧送路（３）に圧送する。この圧送路（３）内の潤滑油を、油圧調整弁（４）で規定圧力に調整してから、各被潤滑部（５ａ）（５ｂ）…へ圧送するように構成する。
【０００５】
この油圧調整弁（４）は弁体（６）が閉弁ばね（７）で閉弁側へ弾圧されるように構成する。圧送路（３）内の潤滑油の圧力が、規定圧力に達するまでは弁体（６）が閉弁ばね（７）の規定張力で閉止されるのに対して、その規定圧力以上になると弁体（６）が閉弁ばね（７）の規定張力に抗して開弁するように構成したものである。
【０００６】
【従来の技術】
上記前提構成において、圧送路（３）内の油圧を制御するための構成として、従来技術では次のものがある。
【０００７】
〇従来技術． 図５参照． （特開平６−３２３１１９号公報）
図５は従来技術を示す水冷縦形ディーゼルエンジンの強制潤滑装置の潤滑系統図である。
前記圧送路（３）内の油圧は、油圧調整弁（４）のみで制御していた。
【０００８】
【特許文献】
特開平６−３２３１１９号公報
【０００９】
【発明が解決しようとする課題】
上記従来技術では、次の問題がある。
［ イ． 寒冷下でエンジンを冷機始動した直後には、オイルの粘性が異常に高くなっているため、圧送路（３）の油圧が異常上昇して、大きなロス馬力が生じるうえ、機壁から大きなオイル鳴り騒音が発生する ］
【００１０】
寒冷下（例えば摂氏０℃以下）でエンジンを冷機始動した直後には、オイルの粘性が異常に高くなっているため、圧送路（３）の流路抵抗が異常上昇して、油圧調整弁（４）の働きが充分に追随できず、圧送路（３）の油圧が異常上昇して、大きなロス馬力が生じるうえ、機壁から大きなオイル鳴り騒音が発生する、という問題がある。
【００１１】
本発明の課題は、次のようにすることにある。
［イ］．寒冷下でエンジンを冷機始動した直後には、圧送路内のオイルを油圧調整弁の規定圧力に達しないうちに早目に逃がして行くことにより、圧送路の油圧が異常上昇することを低減させて、この圧送路内油圧の異常上昇によるロス馬力もオイル鳴り騒音も、低減ないしは解消する。
［ロ］．上記課題［イ］を達成するための構成を簡単なものにして、安価に実施できるようにする。
【００１２】
【課題を解決するための手段】
本発明のエンジンの強制潤滑装置の油圧調整装置は、上記前提構成において、上記課題を解決するために、例えば図１・図２、または図３・図４に示すように、次の特徴構成を追加したことを特徴とする。
【００１３】
○ 発明１． 請求項１． 図１・図２参照．
図１は本発明のエンジンの強制潤滑装置の油圧調整装置の実施形態１を示す、水冷縦形ディーゼルエンジンの強制潤滑装置の潤滑系統図である。図２は図１のＩＩ部の拡大縦断正面図である。
【００１４】
前記圧送路（３）に低温時油圧逃がし弁（８）を油圧調整弁（４）と並列に接続する。その低温時油圧逃がし弁（８）は、油圧逃がし弁体（９）を感温作動器（１０）の感温作動により開閉させるように構成する。
【００１５】
この感温作動器（１０）は、圧送路（３）内を圧送される潤滑油が寒冷温度以下となる低温時には、油圧逃がし弁体（９）の開弁作動を許す。これに対して、その潤滑油が寒冷温度よりも高い高温時には、油圧逃がし弁体（９）を閉止作動させるように構成した、 ことを特徴とする。
【００１６】
○ 発明２． 請求項２． 図３・図４参照．
図３は本発明のエンジンの強制潤滑装置の油圧調整装置の実施形態２を示す、水冷縦形ディーゼルエンジンの強制潤滑装置の潤滑系統図である。図４は図３のＩＶ部の拡大縦断正面図である。
【００１７】
前記油圧調整弁（４）に低温時油圧逃がし用感温作動器（１１）を付設する。この低温時油圧逃がし用感温作動器（１１）は、感温作動により油圧調整弁（４）の弁体（６）を閉弁側へ弾圧する閉弁ばね（７）の張力を、規定張力とこれよりも弱い張力との間で変更させるように構成する。
【００１８】
圧送路（３）内を圧送される潤滑油が寒冷温度以下となる低温時には、低温時油圧逃がし用感温作動器（１１）が感温後退作動して、油圧調整弁（４）の閉弁ばね（７）の張力を規定張力よりも低下させる。これに対して、その潤滑油が寒冷温度よりも高い高温時には、低温時油圧逃がし用感温作動器（１１）が感温前進作動して、閉弁ばね（７）の張力を規定張力に保持するように構成した、 ことを特徴とする。
【００１９】
【発明の効果】
本発明のエンジンの強制潤滑装置の油圧調整装置は、つぎの効果を奏する。
○ 発明１． 請求項１． 図１・図２参照．
【００２０】
［ イ． 寒冷下でエンジンを冷機始動した直後には、圧送路（３）内のオイルが油圧調整弁（４）の規定圧力に達しないうちに、低温時油圧逃がし弁（８）から早目に逃がされて行くことから、圧送路（３）の油圧が異常上昇することが低減されて、この圧送路（３）内油圧の異常上昇によるロス馬力もオイル鳴り騒音も、低減ないしは解消できる。 ］
【００２１】
一般に、寒冷下（例えば摂氏０℃以下）でエンジンを冷機始動した直後には、オイルの粘性が異常に高くなっているため、圧送路（３）の流路抵抗が異常上昇して、油圧調整弁（４）の働きが充分に追随できず、圧送路（３）の油圧が異常上昇して、大きなロス馬力が生じるうえ、機壁から大きなオイル鳴り騒音が発生する、という問題がある。
【００２２】
本発明１は、つぎの特徴構成を有する。
前記圧送路（３）に低温時油圧逃がし弁（８）を油圧調整弁（４）と並列に接続する。その低温時油圧逃がし弁（８）は、油圧逃がし弁体（９）を感温作動器（１０）の感温作動により開閉させるように構成する。
【００２３】
この感温作動器（１０）は、圧送路（３）内を圧送される潤滑油が寒冷温度以下となる低温時には、油圧逃がし弁体（９）の開弁作動を許すのに対して、その潤滑油が寒冷温度よりも高い高温時には、油圧逃がし弁体（９）を閉止作動させるように構成した。
【００２４】
この特徴構成から、寒冷下では、低温時油圧逃がし弁（８）の感温作動器（１０）が油圧逃がし弁体（９）の開弁作動を許す状態になっている。
寒冷下でエンジンを冷機始動した直後には、圧送路（３）内のオイルが油圧調整弁（４）の規定圧力に達しないうちに、低温時油圧逃がし弁（８）から早目に逃がされて行くことから、オイルの低温時の高粘性で圧送路（３）の油圧が異常上昇することが低減ないしは解消される。
これにより、この圧送路（３）内油圧の異常上昇によるロス馬力もオイル鳴り騒音も、低減ないしは解消することができる。
【００２５】
○ 発明２． 請求項２． 図３・図４参照．
［ ロ． 寒冷下でエンジンを冷機始動した直後には、圧送路（３）内のオイルが油圧調整弁（４）の規定圧力に達しないうちに、油圧調整弁（４）から早目に逃がされて行くことから、圧送路（３）の油圧が異常上昇することが低減されて、この圧送路（３）内油圧の異常上昇によるロス馬力もオイル鳴り騒音も、低減ないしは解消できる。 ］
【００２６】
本発明２は、つぎの特徴構成を有する。
前記油圧調整弁（４）に低温時油圧逃がし用感温作動器（１１）を付設する。この低温時油圧逃がし用感温作動器（１１）は、感温作動により油圧調整弁（４）の弁体（６）を閉弁側へ弾圧する閉弁ばね（７）の張力を、規定張力とこれよりも弱い張力との間で変更させるように構成する。
【００２７】
圧送路（３）内を圧送される潤滑油が寒冷温度以下となる低温時には、低温時油圧逃がし用感温作動器（１１）が感温後退作動して、油圧調整弁（４）の閉弁ばね（７）の張力を規定張力よりも低下させる。これに対して、その潤滑油が寒冷温度よりも高い高温時には、低温時油圧逃がし用感温作動器（１１）が感温前進作動して、閉弁ばね（７）の張力を規定張力に保持するように構成した。
【００２８】
この特徴構成から、寒冷下では、低温時油圧逃がし用感温作動器（１１）が感温後退作動して、油圧調整弁（４）の閉弁ばね（７）の張力を規定張力よりも低下させた状態になっている。
【００２９】
寒冷下でエンジンを冷機始動した直後には、圧送路（３）内のオイルが油圧調整弁（４）の規定圧力に達しないうちに、油圧調整弁（４）から早目に逃がされて行くことから、オイルの低温時の高粘性で圧送路（３）の油圧が異常上昇することが低減ないしは解消される。
これにより、この圧送路（３）内油圧の異常上昇によるロス馬力もオイル鳴り騒音も、低減ないしは解消することができる。
【００３０】
［ ハ． 上記効果［イ］を達成するための構成を簡単なものにして、安価に実施できる。 ］
上記効果［イ］を達成するための構成として、エンジンの強制潤滑装置に既存の油圧調整弁（４）の閉弁ばね（７）の構成をそのまま利用して、その油圧調整弁（４）の閉弁ばね（７）の張力を寒冷時に規定張力よりも低下させるための低温時油圧逃がし用感温作動器（１１）を追加するだけで済むので、上記効果［イ］を達成するための構成を簡単なものにして、安価に実施することができる。
【００３１】
【発明の実施の形態】
以下、本発明のエンジンの強制潤滑装置の油圧調整装置の実施の形態を、図面に基づき説明する。
【００３２】
○ 実施形態１． 請求項１． 図１・図２参照．
図１は本発明のエンジンの強制潤滑装置の油圧調整装置の実施形態１を示す、水冷縦形直列４気筒ディーゼルエンジンの強制潤滑装置の潤滑系統図である。図２は図１のＩＩ部の拡大縦断正面図である。
【００３３】
図中符号（２１）はシリンダブロック、（２２）はシリンダヘッド、（２３）はピストン、（２４）はクランク軸である。（２５）は吸・排気弁、（２６）は動弁装置、（２７）は燃料噴射ポンプである。
【００３４】
符号（１）は油溜め、（２）は潤滑ポンプ、（３）は圧送路である。（４）は油圧調整弁、（５ａ）（５ｂ）（５ｃ）は被潤滑部、（６）は…弁体、（７）は閉弁ばねである。（８）は低温時油圧逃がし弁、（９）は油圧逃がし弁体、（１０）はワックス封入式の感温作動器である。
【００３５】
エンジンの強制潤滑装置の油溜め（１）内の潤滑油を、オイルストレーナ（３１）から吸入し、潤滑ポンプ（２）で圧送路（３）に圧送する。この圧送路（３）内の潤滑油を、油圧調整弁（４）で規定圧力に調整してから、オイルフィルタ（３５）で浄化して、クランク軸（２４）・動弁装置（２６）の動弁カム軸（３２）、ロッカアーム軸（３６）・燃料噴射カム軸（３３）の各被潤滑部（５ａ）（５ｂ）（５ｃ）（５ｄ）へ圧送するように構成する。
【００３６】
この油圧調整弁（４）は弁体（６）が閉弁ばね（７）で閉弁側へ弾圧されるように構成する。圧送路（３）内の潤滑油の圧力が、規定圧力に達するまでは弁体（６）が閉弁ばね（７）の規定張力で閉止される。これに対して、その規定圧力以上になると弁体（６）が閉弁ばね（７）の規定張力に抗して開弁するように構成した。
【００３７】
前記圧送路（３）に低温時油圧逃がし弁（８）を油圧調整弁（４）と並列に接続する。その低温時油圧逃がし弁（８）は、油圧逃がし弁体（９）をワックス封入式の感温作動器（１０）の感温作動により開閉させるように構成する。この感温作動器（１０）は圧縮コイルスプリング（３４）で、油圧逃がし弁体（９）を閉弁する側に弾圧されている。
【００３８】
この感温作動器（１０）は、圧送路（３）内を圧送される潤滑油が寒冷温度以下となる低温時には、収縮して油圧逃がし弁体（９）の開弁作動を許す。これに対して、その潤滑油が寒冷温度よりも高い高温時には、伸長して油圧逃がし弁体（９）を閉止作動させるように構成したものである。
【００３９】
○ 実施形態２． 請求項２． 図３・図４参照．
図３は本発明のエンジンの強制潤滑装置の油圧調整装置の実施形態２を示す、水冷縦形直列４気筒ディーゼルエンジンの強制潤滑装置の潤滑系統図である。図４は図３のＩＶ部の拡大縦断正面図である。
【００４０】
図中符号（２１）はシリンダブロック、（２２）はシリンダヘッド、（２３）はピストン、（２４）はクランク軸である。（２５）は吸・排気弁、（２６）は動弁装置、（２７）は燃料噴射ポンプである。
【００４１】
符号（１）は油溜め、（２）は潤滑ポンプ、（３）は圧送路である。（４）は油圧調整弁、（５ａ）（５ｂ）は被潤滑部、（６）は…弁体、（７）は閉弁ばねである。（１１）は低温時油圧逃がし用感温作動器である。
【００４２】
エンジンの強制潤滑装置の油溜め（１）内の潤滑油を、オイルストレーナ（３１）から吸入し、潤滑ポンプ（２）で圧送路（３）に圧送する。この圧送路（３）内の潤滑油を、油圧調整弁（４）で規定圧力に調整してから、オイルフィルタ（３５）で浄化して、クランク軸（２４）・動弁装置（２６）の動弁カム軸（３２）・ロッカアーム軸（３６）・燃料噴射カム軸（３３）の各被潤滑部（５ａ）（５ｂ）（５ｃ）（５ｄ）へ圧送するように構成する。
【００４３】
この油圧調整弁（４）は弁体（６）が閉弁ばね（７）で閉弁側へ弾圧されるように構成する。圧送路（３）内の潤滑油の圧力が、規定圧力に達するまでは弁体（６）が閉弁ばね（７）の規定張力で閉止される。これに対して、その規定圧力以上になると弁体（６）が閉弁ばね（７）の規定張力に抗して開弁するように構成した。
【００４４】
前記油圧調整弁（４）に低温時油圧逃がし用感温作動器（１１）を付設する。この低温時油圧逃がし用感温作動器（１１）は、感温作動により油圧調整弁（４）の弁体（６）を閉弁側へ弾圧する閉弁ばね（７）の張力を、規定張力とこれよりも弱い張力との間で変更させるように構成する。
【００４５】
この低温時油圧逃がし用感温作動器（１１）は、ワックス封入式の感温作動器本体（４１）に感温作動軸（４２）が進退摺動可能に支持されて成る。この感温作動器本体（４１）は、シリンダブロック（２１）の下部の固定壁（４４）にネジキャップ（４５）を介して支持されている。感温作動軸（４２）は閉弁ばね（７）の基端部を支持している。
【００４６】
圧送路（３）内を圧送される潤滑油が寒冷温度以下となる低温時には、低温時油圧逃がし用感温作動器（１１）が感温収縮後退作動して、油圧調整弁（４）の閉弁ばね（７）の張力を規定張力よりも低下させる。これに対して、その潤滑油が寒冷温度よりも高い高温時には、低温時油圧逃がし用感温作動器（１１）が感温伸長前進作動して、閉弁ばね（７）の張力を規定張力に保持するように構成したものである。
【図面の簡単な説明】
【図１】図１は本発明のエンジンの強制潤滑装置の油圧調整装置の実施形態１を示す、水冷縦形ディーゼルエンジンの強制潤滑装置の潤滑系統図である。
【図２】図１のＩＩ部の拡大縦断正面図。
【図３】図３は本発明のエンジンの強制潤滑装置の油圧調整装置の実施形態２を示す、水冷縦形ディーゼルエンジンの強制潤滑装置の潤滑系統図である。
【図４】図３のＩＶ部の拡大縦断正面図。
【図５】図５は従来技術を示す水冷縦形ディーゼルエンジンの強制潤滑装置の潤滑系統図である。
【符号の説明】
１…油溜め、 ２…潤滑ポンプ、 ３…圧送路、 ４…油圧調整弁、 ５ａ・５ｂ…被潤滑部、 ６…弁体、 ７…閉弁ばね、 ８…低温時油圧逃がし弁、 ９…油圧逃がし弁体、 １０…感温作動器、 １１…低温時油圧逃がし用感温作動器。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a hydraulic pressure adjusting device for a forced lubrication device for an engine.
[0002]
[Premise configuration]
An oil pressure adjusting device of a forced lubricating device for an engine according to the present invention is, for example, one having the following premise configuration as shown in FIGS. 1 and 2 (the present invention) or FIG. 5 (prior art).
[0003]
FIG. 1 is a lubrication system diagram of a forced lubrication device for a water-cooled vertical diesel engine, showing a first embodiment of a hydraulic pressure adjusting device for a forced lubrication device for an engine of the present invention. FIG. 2 is an enlarged vertical sectional front view of a portion II in FIG.
FIG. 5 is a lubrication system diagram of a forced lubrication system for a water-cooled vertical diesel engine, which shows the prior art.
[0004]
The lubricating oil in the oil reservoir (1) of the forced lubricating device of the engine is pressure-fed to the pressure feeding path (3) by the lubrication pump (2). The lubricating oil in the pressure feed path (3) is adjusted to a specified pressure by a hydraulic pressure adjusting valve (4) and then fed to each of the lubricated parts (5a) (5b).
[0005]
The hydraulic pressure adjusting valve (4) is configured such that the valve element (6) is resiliently pressed toward the valve closing side by a valve closing spring (7). Until the pressure of the lubricating oil in the pressure feed path (3) reaches the specified pressure, the valve body (6) is closed with the specified tension of the valve-closing spring (7). The body (6) is configured to open the valve against the specified tension of the valve closing spring (7).
[0006]
[Prior art]
In the above-described premise configuration, there are the following configurations in the related art as a configuration for controlling the hydraulic pressure in the pressure feed path (3).
[0007]
〇 Conventional technology. See FIG. (JP-A-6-323119)
FIG. 5 is a lubrication system diagram of a forced lubrication system for a water-cooled vertical diesel engine, which shows the prior art.
The hydraulic pressure in the pressure feed path (3) was controlled only by the hydraulic pressure adjusting valve (4).
[0008]
[Patent Document]
JP-A-6-323119
[Problems to be solved by the invention]
The above prior art has the following problems.
[ I. Immediately after cold start of the engine in cold weather, the oil viscosity is abnormally high, causing the oil pressure in the pressure feed line (3) to rise abnormally, causing large loss horsepower and generating a large oil noise from the machine wall. Noise is generated.
[0010]
Immediately after cold start of the engine under cold conditions (for example, 0 ° C. or lower), the viscosity of the oil is abnormally high, so that the flow path resistance of the pressure feed path (3) rises abnormally and the hydraulic pressure regulating valve ( The function of 4) cannot be sufficiently followed, and the oil pressure in the pressure feed path (3) abnormally rises, resulting in a large loss horsepower and a large oil noise from the machine wall.
[0011]
An object of the present invention is to do the following.
[I]. Immediately after the cold start of the engine in cold weather, the oil in the pressure feed path is released early before reaching the specified pressure of the hydraulic pressure regulating valve, thereby reducing the abnormal rise in oil pressure in the pressure feed path. Thus, the loss horsepower and the oil noise caused by the abnormal increase in the hydraulic pressure in the pressure feed path are reduced or eliminated.
[B]. A configuration for achieving the above-mentioned subject [A] is simplified so that it can be implemented at low cost.
[0012]
[Means for Solving the Problems]
In order to solve the above-described problems, the hydraulic pressure adjusting device for a forced lubricating device for an engine according to the present invention has the following characteristic configuration as shown in FIGS. 1 and 2 or FIGS. It is characterized by being added.
[0013]
○
FIG. 1 is a lubrication system diagram of a forced lubrication device for a water-cooled vertical diesel engine, showing a first embodiment of a hydraulic pressure adjusting device for a forced lubrication device for an engine of the present invention. FIG. 2 is an enlarged vertical sectional front view of a portion II in FIG.
[0014]
A low temperature hydraulic pressure relief valve (8) is connected to the pressure feed path (3) in parallel with the hydraulic pressure adjustment valve (4). The low-temperature hydraulic relief valve (8) is configured to open and close the hydraulic relief valve (9) by the temperature-sensitive operation of the temperature-sensitive actuator (10).
[0015]
The temperature-sensitive actuator (10) allows the hydraulic relief valve (9) to open when the lubricating oil pumped through the pressure feed path (3) is at a low temperature or lower. On the other hand, when the lubricating oil is at a high temperature higher than the cold temperature, the hydraulic relief valve (9) is configured to close.
[0016]
○
FIG. 3 is a lubrication system diagram of a forced lubrication device for a water-cooled vertical diesel engine, showing a second embodiment of the hydraulic pressure adjustment device of the forced lubrication device for the engine of the present invention. FIG. 4 is an enlarged vertical sectional front view of a portion IV in FIG.
[0017]
A temperature-sensitive operating device (11) for releasing hydraulic pressure at low temperature is attached to the hydraulic pressure adjusting valve (4). The low temperature hydraulic pressure relief temperature-sensitive actuator (11) adjusts the tension of a valve-closing spring (7), which elastically presses the valve body (6) of the hydraulic pressure-regulating valve (4) toward the valve-closing side by a temperature-sensitive operation, by a specified tension. And a tension lower than this.
[0018]
At a low temperature when the lubricating oil pumped in the pumping path (3) is lower than the cold temperature, the low-temperature hydraulic relief temperature-sensing device (11) performs a temperature-sensitive retreat operation to close the hydraulic pressure adjusting valve (4). The tension of the spring (7) is made lower than the specified tension. On the other hand, when the lubricating oil is at a high temperature higher than the cold temperature, the low-temperature hydraulic relief temperature-sensitive operating device (11) performs a temperature-sensitive forward operation to maintain the tension of the valve closing spring (7) at a specified tension. It is characterized by the following.
[0019]
【The invention's effect】
The hydraulic pressure adjusting device for the engine forced lubrication device of the present invention has the following effects.
○
[0020]
[ I. Immediately after the cold start of the engine under cold conditions, the oil in the low-pressure hydraulic relief valve (8) is released early before the oil in the pressure feed line (3) reaches the specified pressure of the hydraulic pressure regulating valve (4). Therefore, the abnormal increase in the oil pressure in the pressure feed path (3) is reduced, and the loss horsepower and the oil noise caused by the abnormal increase in the oil pressure in the pressure feed path (3) can be reduced or eliminated. ]
[0021]
In general, immediately after the engine is cold started under cold conditions (for example, 0 ° C. or less), the oil viscosity is abnormally high, so that the flow path resistance of the pressure feed path (3) abnormally rises and the hydraulic pressure is adjusted. There is a problem that the function of the valve (4) cannot sufficiently follow, and the oil pressure in the pressure feed path (3) abnormally rises to generate a large loss horsepower and generate a large oil noise from the machine wall.
[0022]
The
A low temperature hydraulic pressure relief valve (8) is connected to the pressure feed path (3) in parallel with the hydraulic pressure adjustment valve (4). The low-temperature hydraulic relief valve (8) is configured to open and close the hydraulic relief valve (9) by the temperature-sensitive operation of the temperature-sensitive actuator (10).
[0023]
The temperature-sensitive actuator (10) allows the hydraulic relief valve (9) to open at a low temperature when the lubricating oil pumped through the pressure feed path (3) is lower than the cold temperature. When the lubricating oil is at a high temperature higher than the cold temperature, the hydraulic relief valve (9) is closed.
[0024]
From this characteristic configuration, under cold conditions, the temperature-sensitive actuator (10) of the low-temperature hydraulic relief valve (8) allows the hydraulic relief valve body (9) to open.
Immediately after the cold start of the engine under cold conditions, the oil in the low-pressure hydraulic relief valve (8) is released early before the oil in the pressure feed line (3) reaches the specified pressure of the hydraulic pressure regulating valve (4). As a result, the abnormal increase in the oil pressure in the pressure feed path (3) due to the high viscosity of the oil at low temperatures is reduced or eliminated.
As a result, the loss horsepower and the oil noise caused by the abnormal increase in the hydraulic pressure in the pressure feed path (3) can be reduced or eliminated.
[0025]
○
[B. Immediately after the cold start of the engine under cold conditions, the oil in the pressure feed line (3) is quickly released from the hydraulic pressure regulating valve (4) before reaching the specified pressure of the hydraulic pressure regulating valve (4). As a result, the abnormal increase in the hydraulic pressure in the pressure feed path (3) is reduced, and loss horsepower and oil noise caused by the abnormal increase in the hydraulic pressure in the pressure feed path (3) can be reduced or eliminated. ]
[0026]
The
A temperature-sensitive operating device (11) for releasing hydraulic pressure at low temperature is attached to the hydraulic pressure adjusting valve (4). The low temperature hydraulic pressure relief temperature-sensitive actuator (11) adjusts the tension of a valve-closing spring (7), which elastically presses the valve body (6) of the hydraulic pressure-regulating valve (4) toward the valve-closing side by a temperature-sensitive operation, by a specified tension. And a tension lower than this.
[0027]
At a low temperature when the lubricating oil pumped in the pumping path (3) is lower than the cold temperature, the low-temperature hydraulic relief temperature-sensing device (11) performs a temperature-sensitive retreat operation to close the hydraulic pressure adjusting valve (4). The tension of the spring (7) is made lower than the specified tension. On the other hand, when the lubricating oil is at a high temperature higher than the cold temperature, the low-temperature hydraulic relief temperature-sensitive operating device (11) performs a temperature-sensitive forward operation to maintain the tension of the valve closing spring (7) at a specified tension. It was configured to be.
[0028]
Due to this characteristic configuration, under cold conditions, the temperature-sensitive actuator for hydraulic relief at low temperature (11) performs a temperature-sensitive retreat operation to lower the tension of the valve-closing spring (7) of the hydraulic adjustment valve (4) below the specified tension. It is in a state where it has been made.
[0029]
Immediately after the cold start of the engine under cold conditions, the oil in the pressure feed line (3) is quickly released from the hydraulic pressure regulating valve (4) before reaching the specified pressure of the hydraulic pressure regulating valve (4). As a result, the abnormal increase in the oil pressure in the pressure feed path (3) due to the high viscosity of the oil at low temperatures is reduced or eliminated.
As a result, the loss horsepower and the oil noise caused by the abnormal increase in the hydraulic pressure in the pressure feed path (3) can be reduced or eliminated.
[0030]
[C. The structure for achieving the above-mentioned effect [A] can be simplified and implemented inexpensively. ]
As a configuration for achieving the above-mentioned effect [A], the configuration of the valve closing spring (7) of the existing hydraulic adjustment valve (4) is used as it is in the forced lubrication device for the engine, and the configuration of the hydraulic adjustment valve (4) is used. Since it is only necessary to add a low-temperature hydraulic relief temperature-sensitive actuator (11) for lowering the tension of the valve-closing spring (7) below the prescribed tension in cold weather, a configuration for achieving the above effect (a). Can be simplified and implemented inexpensively.
[0031]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a hydraulic pressure adjusting device for a forced lubrication device for an engine according to the present invention will be described with reference to the drawings.
[0032]
○
FIG. 1 is a lubrication system diagram of a forced lubrication device for a water-cooled vertical in-line four-cylinder diesel engine, showing a first embodiment of a hydraulic pressure adjusting device for a forced lubrication device for an engine of the present invention. FIG. 2 is an enlarged vertical sectional front view of a portion II in FIG.
[0033]
In the figure, reference numeral (21) denotes a cylinder block, (22) denotes a cylinder head, (23) denotes a piston, and (24) denotes a crankshaft. (25) is an intake / exhaust valve, (26) is a valve train, and (27) is a fuel injection pump.
[0034]
Reference numeral (1) denotes an oil reservoir, (2) denotes a lubrication pump, and (3) denotes a pressure feed path. (4) is a hydraulic adjustment valve, (5a), (5b) and (5c) are lubricated parts, (6) is a valve body, and (7) is a valve closing spring. (8) is a hydraulic relief valve at low temperature, (9) is a hydraulic relief valve, and (10) is a wax-filled temperature-sensitive actuator.
[0035]
Lubricating oil in an oil reservoir (1) of a forced lubricating device of an engine is sucked from an oil strainer (31) and is pressure-fed to a pressure feeding path (3) by a lubrication pump (2). The lubricating oil in the pressure feed path (3) is adjusted to a specified pressure by a hydraulic pressure adjusting valve (4), and then purified by an oil filter (35), so that the crankshaft (24) and the valve train (26) The valve camshaft (32), the rocker arm shaft (36), and the fuel injection camshaft (33) are configured to be fed to the lubricated portions (5a) (5b) (5c) (5d).
[0036]
The hydraulic pressure adjusting valve (4) is configured such that the valve element (6) is resiliently pressed toward the valve closing side by a valve closing spring (7). Until the pressure of the lubricating oil in the pressure feed path (3) reaches the specified pressure, the valve body (6) is closed by the specified tension of the valve closing spring (7). On the other hand, when the pressure exceeds the specified pressure, the valve element (6) is configured to open against the specified tension of the valve closing spring (7).
[0037]
A low temperature hydraulic pressure relief valve (8) is connected to the pressure feed path (3) in parallel with the hydraulic pressure adjustment valve (4). The low-temperature hydraulic relief valve (8) is configured to open and close the hydraulic relief valve (9) by a temperature-sensitive operation of a wax-sealed temperature-sensitive actuator (10). The temperature-sensitive actuator (10) is compressed by a compression coil spring (34) to the side that closes the hydraulic relief valve (9).
[0038]
The temperature-sensitive actuator (10) contracts to allow the hydraulic relief valve (9) to open at a low temperature when the lubricating oil pumped in the pressure feed path (3) is lower than the cold temperature. On the other hand, when the lubricating oil is at a high temperature higher than the cold temperature, the lubricating oil is extended to close the hydraulic relief valve (9).
[0039]
○
FIG. 3 is a lubrication system diagram of a forced lubrication device for a water-cooled vertical in-line four-cylinder diesel engine, showing a second embodiment of a hydraulic pressure adjusting device for an engine forced lubrication device of the present invention. FIG. 4 is an enlarged vertical sectional front view of a portion IV in FIG.
[0040]
In the figure, reference numeral (21) denotes a cylinder block, (22) denotes a cylinder head, (23) denotes a piston, and (24) denotes a crankshaft. (25) is an intake / exhaust valve, (26) is a valve train, and (27) is a fuel injection pump.
[0041]
Reference numeral (1) denotes an oil reservoir, (2) denotes a lubrication pump, and (3) denotes a pressure feed path. (4) is a hydraulic adjustment valve, (5a) and (5b) are lubricated parts, (6) is a valve body, and (7) is a valve closing spring. (11) is a temperature-sensitive actuator for releasing hydraulic pressure at low temperature.
[0042]
Lubricating oil in an oil reservoir (1) of a forced lubricating device of an engine is sucked from an oil strainer (31) and is pressure-fed to a pressure feeding path (3) by a lubrication pump (2). The lubricating oil in the pressure feed path (3) is adjusted to a specified pressure by a hydraulic pressure adjusting valve (4), and then purified by an oil filter (35), so that the crankshaft (24) and the valve train (26) The valve camshaft (32), the rocker arm shaft (36), and the fuel injection camshaft (33) are configured to be fed to the lubricated portions (5a) (5b) (5c) (5d).
[0043]
The hydraulic pressure adjusting valve (4) is configured such that the valve element (6) is resiliently pressed toward the valve closing side by a valve closing spring (7). Until the pressure of the lubricating oil in the pressure feed path (3) reaches the specified pressure, the valve body (6) is closed by the specified tension of the valve closing spring (7). On the other hand, when the pressure exceeds the specified pressure, the valve element (6) is configured to open against the specified tension of the valve closing spring (7).
[0044]
A temperature-sensitive operating device (11) for releasing hydraulic pressure at low temperature is attached to the hydraulic pressure adjusting valve (4). The low temperature hydraulic pressure relief temperature-sensitive actuator (11) adjusts the tension of a valve-closing spring (7), which elastically presses the valve body (6) of the hydraulic pressure-regulating valve (4) toward the valve-closing side by a temperature-sensitive operation, by a specified tension. And a tension lower than this.
[0045]
The temperature-sensitive operating device (11) for releasing hydraulic pressure at low temperature has a temperature-sensitive operating shaft (42) supported by a wax-sealed type temperature-sensitive operating device body (41) so as to be able to slide forward and backward. The temperature-sensitive actuator main body (41) is supported on a fixed wall (44) below the cylinder block (21) via a screw cap (45). The temperature-sensitive operating shaft (42) supports the base end of the valve-closing spring (7).
[0046]
At a low temperature when the lubricating oil pumped in the pumping path (3) is lower than the cold temperature, the low-temperature hydraulic relief temperature-sensitive actuator (11) retreats to a temperature-sensitive contraction and closes the hydraulic pressure adjusting valve (4). The tension of the valve spring (7) is made lower than the specified tension. On the other hand, when the lubricating oil is at a high temperature higher than the cold temperature, the low-temperature hydraulic relief temperature-sensitive operating device (11) operates to extend the temperature-sensitive operation to bring the tension of the valve closing spring (7) to the specified tension. It is configured to hold.
[Brief description of the drawings]
FIG. 1 is a lubrication system diagram of a forced lubrication device for a water-cooled vertical diesel engine, showing a first embodiment of a hydraulic pressure adjusting device for a forced lubrication device for an engine of the present invention.
FIG. 2 is an enlarged vertical sectional front view of a portion II in FIG. 1;
FIG. 3 is a lubrication system diagram of a forced lubrication device for a water-cooled vertical diesel engine, showing a second embodiment of a hydraulic pressure adjusting device for a forced lubrication device for an engine of the present invention.
FIG. 4 is an enlarged vertical sectional front view of an IV section in FIG. 3;
FIG. 5 is a lubrication system diagram of a forced lubrication device for a water-cooled vertical diesel engine according to the prior art.
[Explanation of symbols]
DESCRIPTION OF
Claims (2)
この油圧調整弁（４）は弁体（６）が閉弁ばね（７）で閉弁側へ弾圧されるように構成し、圧送路（３）内の潤滑油の圧力が、規定圧力に達するまでは弁体（６）が閉弁ばね（７）の規定張力で閉止されるのに対して、その規定圧力以上になると弁体（６）が閉弁ばね（７）の規定張力に抗して開弁するように構成した、
エンジンの強制潤滑装置の油圧調整装置において、
前記圧送路（３）に低温時油圧逃がし弁（８）を油圧調整弁（４）と並列に接続し、その低温時油圧逃がし弁（８）は、油圧逃がし弁体（９）を感温作動器（１０）の感温作動により開閉させるように構成し、
この感温作動器（１０）は、圧送路（３）内を圧送される潤滑油が寒冷温度以下となる低温時には、油圧逃がし弁体（９）の開弁作動を許すのに対して、その潤滑油が寒冷温度よりも高い高温時には、油圧逃がし弁体（９）を閉止作動させるように構成した、
ことを特徴とするエンジンの強制潤滑装置の油圧調整装置。The lubricating oil in the oil sump (1) of the engine forced lubricating device is pumped by the lubricating pump (2) to the pressure feed path (3), and the lubricating oil in the pressure feed path (3) is supplied to the hydraulic pressure adjusting valve (4). , The pressure is adjusted to the specified pressure, and then the pressure is sent to each of the lubricated parts (5a) (5b).
The hydraulic pressure adjusting valve (4) is configured such that the valve element (6) is resiliently pressed toward the valve closing side by a valve closing spring (7), and the pressure of the lubricating oil in the pressure feed path (3) reaches a specified pressure. Up to this point, the valve body (6) is closed by the specified tension of the valve-closing spring (7). To open the valve.
In the hydraulic adjustment device of the engine forced lubrication device,
A low-temperature hydraulic relief valve (8) is connected to the pressure feed path (3) in parallel with the hydraulic pressure adjusting valve (4), and the low-temperature hydraulic relief valve (8) operates the hydraulic relief valve body (9) in a temperature-sensitive manner. The container (10) is configured to be opened and closed by a temperature-sensitive operation,
The temperature-sensitive actuator (10) allows the hydraulic relief valve (9) to open at a low temperature when the lubricating oil pumped in the pressure feed path (3) is lower than the cold temperature. When the lubricating oil is at a high temperature higher than the cold temperature, the hydraulic relief valve (9) is configured to close.
A hydraulic adjustment device for a forced lubrication device for an engine, characterized in that:
この油圧調整弁（４）は弁体（６）が閉弁ばね（７）で閉弁側へ弾圧されるように構成し、圧送路（３）内の潤滑油の圧力が、規定圧力に達するまでは弁体（６）が閉弁ばね（７）の規定張力で閉止されるのに対して、その規定圧力以上になると弁体（６）が閉弁ばね（７）の規定張力に抗して開弁するように構成した、
エンジンの強制潤滑装置の油圧調整装置において、
前記油圧調整弁（４）に低温時油圧逃がし用感温作動器（１１）を付設し、この低温時油圧逃がし用感温作動器（１１）は、感温作動により油圧調整弁（４）の弁体（６）を閉弁側へ弾圧する閉弁ばね（７）の張力を、規定張力とこれよりも弱い張力との間で変更させるように構成し、
圧送路（３）内を圧送される潤滑油が寒冷温度以下となる低温時には、低温時油圧逃がし用感温作動器（１１）が感温後退作動して、油圧調整弁（４）の閉弁ばね（７）の張力を規定張力よりも低下させるのに対して、その潤滑油が寒冷温度よりも高い高温時には、低温時油圧逃がし用感温作動器（１１）が感温前進作動して、閉弁ばね（７）の張力を規定張力に保持するように構成した、
ことを特徴とするエンジンの強制潤滑装置の油圧調整装置。The lubricating oil in the oil sump (1) of the engine forced lubricating device is pumped by the lubricating pump (2) to the pressure feed path (3), and the lubricating oil in the pressure feed path (3) is supplied to the hydraulic pressure adjusting valve (4). , The pressure is adjusted to the specified pressure, and then the pressure is sent to each of the lubricated parts (5a) (5b).
The hydraulic pressure adjusting valve (4) is configured such that the valve element (6) is resiliently pressed toward the valve closing side by a valve closing spring (7), and the pressure of the lubricating oil in the pressure feed path (3) reaches a specified pressure. Up to this point, the valve body (6) is closed by the specified tension of the valve-closing spring (7). To open the valve.
In the hydraulic adjustment device of the engine forced lubrication device,
A low-temperature hydraulic relief temperature-sensitive actuator (11) is attached to the hydraulic pressure-regulating valve (4), and the low-temperature hydraulic pressure-releasing temperature-sensitive actuator (11) is operated by a temperature-sensitive operation. The tension of the valve closing spring (7) for resiliently pressing the valve body (6) toward the valve closing side is changed between a specified tension and a tension lower than this, and
At a low temperature when the lubricating oil pumped in the pumping path (3) is lower than the cold temperature, the low-temperature hydraulic relief temperature-sensing device (11) performs a temperature-sensitive retreat operation to close the hydraulic pressure adjusting valve (4). While the tension of the spring (7) is reduced below the specified tension, when the lubricating oil is at a high temperature higher than the cold temperature, the low-temperature hydraulic relief temperature-sensitive operating device (11) performs a temperature-sensitive forward operation, The tension of the valve closing spring (7) is maintained at a specified tension.
A hydraulic adjustment device for a forced lubrication device for an engine, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002268097A JP2004108157A (en) | 2002-09-13 | 2002-09-13 | Hydraulic regulating device for forced lubrication device in engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002268097A JP2004108157A (en) | 2002-09-13 | 2002-09-13 | Hydraulic regulating device for forced lubrication device in engine |
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| Publication Number | Publication Date |
|---|---|
| JP2004108157A true JP2004108157A (en) | 2004-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002268097A Pending JP2004108157A (en) | 2002-09-13 | 2002-09-13 | Hydraulic regulating device for forced lubrication device in engine |
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| JP (1) | JP2004108157A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009133262A (en) * | 2007-11-30 | 2009-06-18 | National Institute Of Advanced Industrial & Technology | Fuel injection pump lubricating device |
| EP2090758A1 (en) | 2008-02-13 | 2009-08-19 | Peugeot Citroen Automobiles SA | Lubrication circuit |
-
2002
- 2002-09-13 JP JP2002268097A patent/JP2004108157A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009133262A (en) * | 2007-11-30 | 2009-06-18 | National Institute Of Advanced Industrial & Technology | Fuel injection pump lubricating device |
| EP2090758A1 (en) | 2008-02-13 | 2009-08-19 | Peugeot Citroen Automobiles SA | Lubrication circuit |
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