JPH0660317B2 - Diesel engine lubrication system - Google Patents

Diesel engine lubrication system

Info

Publication number
JPH0660317B2
JPH0660317B2 JP61157893A JP15789386A JPH0660317B2 JP H0660317 B2 JPH0660317 B2 JP H0660317B2 JP 61157893 A JP61157893 A JP 61157893A JP 15789386 A JP15789386 A JP 15789386A JP H0660317 B2 JPH0660317 B2 JP H0660317B2
Authority
JP
Japan
Prior art keywords
oil
filter
weight
diesel engine
composition
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.)
Expired - Lifetime
Application number
JP61157893A
Other languages
Japanese (ja)
Other versions
JPS6315895A (en
Inventor
彌之助 佐藤
昇 渡辺
喬司 並木
義征 新田
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.)
Hitachi Construction Machinery Co Ltd
Idemitsu Kosan Co Ltd
Isuzu Motors Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
Idemitsu Kosan Co Ltd
Isuzu Motors 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 Hitachi Construction Machinery Co Ltd, Idemitsu Kosan Co Ltd, Isuzu Motors Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP61157893A priority Critical patent/JPH0660317B2/en
Publication of JPS6315895A publication Critical patent/JPS6315895A/en
Publication of JPH0660317B2 publication Critical patent/JPH0660317B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00Pressure lubrication
    • F01M1/10Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00Engines characterised by air compression and subsequent fuel addition
    • F02B3/06Engines characterised by air compression and subsequent fuel addition with compression ignition

Abstract

PURPOSE:To enable the prolongation of the service period of a lubricating oil and the labor saving with respect to the maintenance through prevention of troubles with respect to lubrication due to solid impurities, by making use of a particular lubricant and a stack filter as a by-pass oil filter. CONSTITUTION:A mineral oil and/or a synthetic oil having a kinetic viscosity at 100 deg.C of 3-30cst is blended with 1-8wt% (hereinafter abbreviated to '%') calcium sulfonate having a basicity of 80mgKOH/g or less, 0.5-8% calcium sulfonate having a basicity of 150mgKOH/g or more, 0.5-10% calcium phenate having a basicity of 100mgKOH/g or more, 1-10% alkenylsuccinimide, and 0.5-5% zinc dithiophosphate, thereby preparing a lubricant composition having a solid impurity agglomeration property. The aforesaid composition stored in an oil vessel 4 is passed through a full-flow oil filter 3 with an oil transfer pump and fed into each portion 6 of a diesel engine. Part of the composition which has passed through the filter 3 then passes through a stack filter 1 as a by-pass oil filter having a pore diameter of 7-25mum, a filter medium thickness of 0.6-1.8mm, and an orifice diameter 2 of 0.6-2mm.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明はディーゼルエンジンの潤滑システムに関し、詳
しくはディーゼルエンジン駆動時に不可避的に発生する
煤などの固形不純物を効率よく捕捉,除去することによ
り固形不純物による潤滑上のトラブルを抑制し、更油期
間を延長してメインテナンスの省力化を可能としたディ
ーゼルエンジンの潤滑システムに関する。
Description: TECHNICAL FIELD The present invention relates to a diesel engine lubrication system, and more specifically, to a solid state by efficiently capturing and removing solid impurities such as soot that are inevitably generated when a diesel engine is driven. The present invention relates to a diesel engine lubrication system that suppresses lubrication troubles caused by impurities, extends the oil-refreshing period, and saves labor in maintenance.

[従来の技術および発明が解決しようとする問題点] ディーゼルエンジンは、ガソリンエンジンに比し燃焼圧
力が高いため燃焼室内が高温となる。また、ディーゼル
エンジンはその燃焼構造上、ガソリンエンジンに比し不
完全燃焼が起こりやすい。したがって、ディーゼルエン
ジンは潤滑油の酸化分解による煤や燃焼残渣など油に不
溶解の固形不純物を発生することが避けられず、この固
形不純物が潤滑系に混入して潤滑上トラブルを起こす虞
れがある。すなわち、固形不純物が多量に混入すると、
潤滑条件の最も厳しいカム,弁,ロッカーアーム等の動
弁系が摩耗し、また潤滑油の粘度が上昇して動力損失が
大きくなったり、オイルフィルターの目詰り現象を惹起
するなど潤滑上のトラブルが発生する。特に排気ガス再
循環装置(EGR)装着のディーゼルエンジンでは、一層
多量に煤を発生するため、その解決が望まれていた。
[Problems to be Solved by Prior Art and Invention] Since the combustion pressure of a diesel engine is higher than that of a gasoline engine, the temperature inside the combustion chamber becomes high. Further, due to its combustion structure, the diesel engine is more likely to cause incomplete combustion than the gasoline engine. Therefore, it is unavoidable that diesel engines generate solid impurities that are insoluble in oil such as soot and combustion residues due to oxidative decomposition of lubricating oil, and this solid impurities may mix into the lubricating system and cause troubles in lubrication. is there. That is, if a large amount of solid impurities are mixed in,
Lubrication problems such as wear of the valve system such as cams, valves, rocker arms, etc., which have the most severe lubrication conditions, increased viscosity of lubricating oil, resulting in large power loss, and clogging of oil filters. Occurs. In particular, a diesel engine equipped with an exhaust gas recirculation device (EGR) produces a larger amount of soot, and therefore a solution to it has been desired.

そこで従来、固形不純物を微細粒子として油中に分散さ
せるために清浄分散剤を添加することが行なわれている
が、十分満足しうるものではなかった。
Therefore, a detergent dispersant has been conventionally added to disperse solid impurities in the oil as fine particles, but it has not been sufficiently satisfactory.

このため、このように固形不純物を微細粒子として油中
に分散させるという考え方とは全く正反対の考え方に基
づく提案がなされている。すなわち、特開昭60-6790号
公報には沈降・堆積が起らない程度に固形不純物を凝集
せしめて粗大化し、これを循環系に配設したバイパスフ
ィルタで捕捉・除去しようとする着想の下に、特定の組
成からなるディーゼルエンジン用潤滑油組成物が開示さ
れている。
For this reason, proposals have been made based on a concept that is completely opposite to the concept of dispersing solid impurities as fine particles in oil. That is, in JP-A-60-6790, the idea is to agglomerate and coarsen solid impurities to the extent that settling / deposition does not occur, and to capture / remove them by a bypass filter arranged in the circulation system. Discloses a diesel engine lubricating oil composition having a specific composition.

しかしながら、この潤滑油組成物はマグネシウムスルホ
ネートを必須成分としているため、これがある特定の条
件下で微量の水分と反応し、結晶化してフィルタの目詰
りを発生する虞れがあることが判った。
However, since this lubricating oil composition contains magnesium sulfonate as an essential component, it has been found that it may react with a small amount of water under certain specific conditions and crystallize to cause clogging of the filter.

本発明者はマグネシウムスルホネートを用いることな
く、しかも従来の問題を解消すべく鋭意研究を重ねた。
その結果、特定の組成を有する潤滑油を用いるととも
に、特定のバイパスフィルタをディーゼルエンジン内に
配置することによって、系全体の潤滑効果を大巾に改善
できることを見出し、この知見に基いて本発明を完成し
た。
The present inventor has conducted extensive studies without using magnesium sulfonate and to solve the conventional problems.
As a result, by using a lubricating oil having a specific composition and arranging a specific bypass filter in the diesel engine, it was found that the lubricating effect of the entire system can be greatly improved, and the present invention is based on this finding. completed.

[問題点を解決するための手段] すなわち本発明は、鉱油および/または合成油からなる
基油に、(a)塩基価80以下のカルシウムスルホネート
1〜8重量%,(b)塩基価150以上のカルシウムスル
ホネート0.5〜8重量%,(c)塩基価100以上のカルシ
ウムフェネート0.5〜10重量%,(d)アルケニルコハク
酸イミド1〜10重量%および(e)ジチオリン酸亜鉛0.5
〜5重量%を添加してなる潤滑油組成物を用い、バイパ
スオイルフィルタとしてスタック式フィルタを用いるこ
とを特徴とするディーゼルエンジンの潤滑システムを提
供するものである。
[Means for Solving the Problems] That is, according to the present invention, (a) 1 to 8% by weight of calcium sulfonate having a base number of 80 or less and (b) a base number of 150 or more are added to a base oil composed of mineral oil and / or synthetic oil. 0.5 to 8% by weight of calcium sulfonate, (c) 0.5 to 10% by weight of calcium phenate having a base number of 100 or more, (d) 1 to 10% by weight of alkenylsuccinimide and (e) 0.5 zinc dithiophosphate.
A lubrication system for a diesel engine is provided which is characterized by using a lubricating oil composition containing 5 to 5% by weight and using a stack type filter as a bypass oil filter.

このような潤滑油組成物は、固形不純物凝集性を有する
潤滑油組成物と言うことができ、バイパスオイルフィル
タとして用いるスタック式フィルタにより補足しうる程
度に煤などの固形不純物を凝集,粗大化することのでき
る潤滑油組成物である。
Such a lubricating oil composition can be referred to as a lubricating oil composition having solid impurity cohesiveness, and coagulates and coarsens solid impurities such as soot to an extent that can be captured by a stack type filter used as a bypass oil filter. A lubricating oil composition that can be used.

このような潤滑油組成物の基油として鉱油および/また
は合成油を用いる。ここで鉱油および/または合成油と
しては特に制限はないが、100℃の動粘度が3〜30セン
チストークス(cSt)のものが潤滑性の維持,向上や動
力損失を低減する見地から好ましい。具体的には鉱油と
してナフテン系鉱油,中間系鉱油,パラフィン系鉱油の
潤滑油留分あるいはこれら鉱油類の分解によって得られ
る高芳香族成分などを例示することができ、合成油とし
てブテン,オクテン,デセン,ドデセン等α−オレフィ
ンの重合物であるポリオレフィン,長鎖アルキルベンゼ
ン,分枝アルキルベンゼン,アルキルナフタリン,エス
テル油あるいはポリグリコール油などを例示することが
できる。
A mineral oil and / or a synthetic oil is used as a base oil of such a lubricating oil composition. The mineral oil and / or synthetic oil is not particularly limited, but those having a kinematic viscosity at 100 ° C. of 3 to 30 centistokes (cSt) are preferable from the viewpoint of maintaining and improving lubricity and reducing power loss. Specific examples of the mineral oil include naphthene-based mineral oil, intermediate-based mineral oil, lubricating oil fraction of paraffin-based mineral oil, and highly aromatic components obtained by decomposing these mineral oils. Synthetic oils include butene, octene, Examples include polyolefins, which are polymers of α-olefins such as decene and dodecene, long-chain alkylbenzenes, branched alkylbenzenes, alkylnaphthalenes, ester oils and polyglycol oils.

上述の油は単独であるいは二種類以上を混合して用いる
ことができる。
The above oils can be used alone or in admixture of two or more.

上述の基油に、下記の(a)〜(e)成分を添加する。The following components (a) to (e) are added to the above base oil.

まず本発明においては(a)成分として塩基価80(mgKOH/g)
以下、好ましくは5〜60のカルシウムスルホネートを用
いる。このカルシウムスルホネートは、常法により製造
することができ、例えばアルキル芳香族を発煙硫酸また
は亜硫酸ガスでスルホン化した後、カルシウム塩に変換
して得られる。
First, in the present invention, as the component (a), a base number of 80 (mgKOH / g)
Hereafter, preferably 5 to 60 calcium sulfonate is used. This calcium sulfonate can be produced by a conventional method, for example, obtained by sulfonating an alkyl aromatic with fuming sulfuric acid or sulfurous acid gas and then converting it into a calcium salt.

この(a)成分は潤滑油組成物の全重量に対し、1〜8重
量%、好ましくは2〜6重量%の割合で添加される。
The component (a) is added in an amount of 1 to 8% by weight, preferably 2 to 6% by weight, based on the total weight of the lubricating oil composition.

ここで(a)成分の添加量が1重量%未満であると清浄性
が十分でなく、一方8重量%を超えると、分散性が良好
となるため、好ましくない。
If the added amount of the component (a) is less than 1% by weight, the detergency is not sufficient, while if it exceeds 8% by weight, the dispersibility becomes good, which is not preferable.

次に本発明においては、(b)成分として塩基価150以上、
好ましくは200以上のカルシウムスルホネートを用い
る。
Next, in the present invention, a base number of 150 or more as the component (b),
Preferably 200 or more calcium sulfonates are used.

本発明においては、このように塩基価80以下のカルシウ
ムスルホネートと塩基価150以上のカルシウムスルホネ
ートを併用する。ここで両者を併用せずに一方のカルシ
ウムスルホネートを用いても固形不純物の分散性が大き
く好ましくない。
In the present invention, thus, the calcium sulfonate having a base number of 80 or less and the calcium sulfonate having a base number of 150 or more are used together. If one of the calcium sulfonates is used without using both of them together, the dispersibility of solid impurities is large and it is not preferable.

本発明において上記(b)成分は潤滑油組成物の全重量に
対し、0.5〜8重量%、好ましくは、2〜6重量%の割
合で添加される。
In the present invention, the component (b) is added in a proportion of 0.5 to 8% by weight, preferably 2 to 6% by weight, based on the total weight of the lubricating oil composition.

ここで(b)成分の添加量が0.5重量%未満であると清浄性
が不足し、一方8重量%を超えるとエンジン燃焼室にデ
ポジットを生ずるので好ましくない。
If the amount of the component (b) added is less than 0.5% by weight, cleanliness will be insufficient, and if it exceeds 8% by weight, deposits will be generated in the engine combustion chamber, which is not preferable.

また本発明においては(c)成分として塩基価100以上のカ
ルシウムフェネートを用いる。ここで塩基価が100未満
のものであると、固形物が細かく分散して本目的を達成
できないので好ましくない。
In the present invention, calcium phenate having a base number of 100 or more is used as the component (c). Here, if the base number is less than 100, the solid matter is finely dispersed and the object cannot be achieved, which is not preferable.

このカルシウムフェネートは常法により製造することが
でき、例えばアルキルフェノールまたは硫化アルキルフ
ェノールのカルシウム塩もしくはこのカルシウム塩を炭
酸化することにより得ることができる。
This calcium phenate can be produced by a conventional method, for example, a calcium salt of alkylphenol or sulfurized alkylphenol or a calcium salt of this calcium salt.

なお、上記各成分の塩基価の調整は、原料の種類,使用
割合,炭酸化の度合等を適宜選定することにより行なえ
ばよい。
The base number of each of the above components may be adjusted by appropriately selecting the type of raw material, the usage ratio, the degree of carbonation, and the like.

この(c)成分は潤滑油組成物の全量に対し0.5〜10重量
%、好ましくは1〜5重量%の割合で添加される。
The component (c) is added in an amount of 0.5 to 10% by weight, preferably 1 to 5% by weight, based on the total amount of the lubricating oil composition.

ここで(c)成分の添加量が0.5重量%未満であると添加効
果がなく、一方10重量%を超えると、固形物の分散によ
り、結果的に動弁系の摩耗を促進するため好ましくな
い。
Here, if the addition amount of the component (c) is less than 0.5% by weight, there is no addition effect, while if it exceeds 10% by weight, the solids are dispersed, and as a result, wear of the valve train is accelerated, which is not preferable. .

さらに本発明においては(d)成分としてアルケニルコハ
ク酸イミドを用いる。このアルケニルコハク酸イミドと
しては、例えば分子量300〜5000のポリオレフィンを無
水マレイン酸と反応させてモノアルケニル無水コハク酸
とし、このモノアルケニル無水コハク酸にポリアミンを
反応させてイミド化したものや得られたイミドに芳香族
ポリカルボン酸を作用させて、残るアミノ基の一部をア
ミド化したもの等が用いられる。さらに、(d)成分とし
てはアルケニルコハク酸イミドのホウ素化合物誘導体を
用いることもできる。
Further, in the present invention, an alkenyl succinimide is used as the component (d). As the alkenyl succinimide, for example, a polyolefin having a molecular weight of 300 to 5000 is reacted with maleic anhydride to form a monoalkenyl succinic anhydride, and the monoalkenyl succinic anhydride is reacted with a polyamine to obtain an imidized product. A compound in which an aromatic polycarboxylic acid is allowed to act on imide to partially amidate the remaining amino group is used. Further, a boron compound derivative of alkenyl succinimide may be used as the component (d).

この(d)成分は潤滑油組成物の全量に対し、1〜10重量
%、好ましくは2〜6重量%の割合で添加される。ここ
で(d)成分の添加量が1重量%未満であると添加効果が
なく、一方10重量%を超えると固形不純物の分散性が大
きくなるため好ましくない。
The component (d) is added in an amount of 1 to 10% by weight, preferably 2 to 6% by weight, based on the total amount of the lubricating oil composition. Here, if the addition amount of the component (d) is less than 1% by weight, there is no effect of addition, while if it exceeds 10% by weight, the dispersibility of solid impurities increases, which is not preferable.

最後に本発明においては(e)成分としてジチオリン酸亜
鉛を用いる。
Finally, in the present invention, zinc dithiophosphate is used as the component (e).

ここでジチオリン酸亜鉛は下記一般式 (式中、R〜Rはアルキル基またはアリール基を示
し、R〜Rは同一であっても異なるものであっても
よい。) で表わされるものである。式中のアルキル基としては特
に制限はないが、炭素数3〜12のものが好ましい。ま
た、アリール基についても制限はなく、置換アリール基
も含まれ、この場合の置換基はアルキル基が好ましい。
特にアリール基を有するものを全チオリン酸亜鉛の1/2
以上含むものが好ましい。
Here, zinc dithiophosphate is represented by the following general formula (In the formula, R 1 to R 4 represent an alkyl group or an aryl group, and R 1 to R 4 may be the same or different.). The alkyl group in the formula is not particularly limited, but those having 3 to 12 carbon atoms are preferable. Further, the aryl group is not limited, and a substituted aryl group is also included. In this case, the substituent is preferably an alkyl group.
Especially those with aryl groups are 1/2 of total zinc thiophosphate
Those including the above are preferable.

この(e)成分は潤滑油組成物の全量に対し、0.5〜5重量
%、好ましくは1〜4重量%の割合で添加される。ここ
で(e)成分の添加量が0.5重量%未満であると耐摩耗性が
不充分である。一方5重量%を超えて配合しても配合量
に見合うだけの効果を得ることはできない。
The component (e) is added in a proportion of 0.5 to 5% by weight, preferably 1 to 4% by weight, based on the total amount of the lubricating oil composition. If the amount of the component (e) added is less than 0.5% by weight, the abrasion resistance is insufficient. On the other hand, even if the amount is more than 5% by weight, it is not possible to obtain the effect commensurate with the amount.

本発明において用いる潤滑油組成物は上記成分からな
り、いずれを欠いても本発明の目的を達成することはで
きない。
The lubricating oil composition used in the present invention comprises the above-mentioned components, and the object of the present invention cannot be achieved even if any of them is lacking.

なお、本発明においてはさらに必要に応じてその他の清
浄分散剤,ポリイソブチレン,ポリメタアクリレート等
の粘度指数向上剤,シリコーン油等の消泡剤をはじめ油
性剤,極圧剤,腐食防止剤などの各種添加剤を適宜配合
することもできる。
In the present invention, if necessary, other detergent dispersants, viscosity index improvers such as polyisobutylene and polymethacrylate, defoamers such as silicone oil, oiliness agents, extreme pressure agents, corrosion inhibitors, etc. It is also possible to properly mix the various additives described above.

叙上の如き潤滑油組成物は100℃における動粘度が3〜3
0cStであり、塩基価が3〜20のものである。
Lubricating oil compositions such as the above have a kinematic viscosity of 3 to 3 at 100 ° C.
It has 0 cSt and a base number of 3 to 20.

本発明においては潤滑油として叙上の如き組成を有し、
固形不純物凝集性を有する潤滑油を用いるとともに、バ
イパスオイルフィルタを備え、このバイパスオイルフィ
ルタとしてスタック式フィルタを用いることが必要であ
る。すなわち、叙上の如き潤滑油を用いることにより清
浄性を確保しつつ煤を凝集、粗大化できるが、これのみ
では不充分であって以下に示すスタック式のバイパスオ
イルフィルタを用いることによりろ過捕捉効率を最大限
に発揮して油中の煤量を低減し目的を達成できるわけで
ある。第1図は本発明の潤滑システムの概念図である。
In the present invention, the lubricating oil has the above composition,
It is necessary to use a lubricating oil having solid impurity cohesiveness, a bypass oil filter, and a stack type filter as the bypass oil filter. That is, it is possible to agglomerate and coarsen soot while ensuring cleanliness by using a lubricating oil such as the above, but this is not enough alone and it is not possible to filter and capture by using the stack type bypass oil filter shown below. It is possible to achieve maximum efficiency by reducing the amount of soot in the oil and achieving the purpose. FIG. 1 is a conceptual diagram of the lubrication system of the present invention.

すなわちバイパスオイルフィルタ1としてスタック式の
構造のものを用いる。スタック式フィルタとは積層式と
も称され、ろ材を多数枚積み重ねて作られるもので第2
図に例示した構造を有するものである。第2図に例示し
たスタック式フィルタは、ろ材を60°ずつ変位させ多数
枚積層したものを示している。
That is, the bypass oil filter 1 having a stack structure is used. The stack type filter is also called a laminated type and is made by stacking many filter media.
It has the structure illustrated in the drawing. The stack type filter illustrated in FIG. 2 shows a filter in which a large number of filter media are laminated by shifting them by 60 °.

本発明はスタック式フィルタを用いることによって達成
できるが、さらに以下の要件ょ満たすフィルタであるこ
とが有利である。すなわちろ材の気孔径が7〜25μm、
特に好ましくは10〜20μm、ろ材の厚さが0.6〜1.8mm、
特に好ましくは1.0〜1.5mmのものである。
The present invention can be achieved by using a stack type filter, but it is advantageous that the filter further satisfies the following requirements. That is, the pore size of the filter medium is 7 to 25 μm,
Particularly preferably 10 to 20 μm, the thickness of the filter medium is 0.6 to 1.8 mm,
It is particularly preferably 1.0 to 1.5 mm.

なお気孔径の径はJIS B-8356による値である。ここで気
孔径が7μm未満のものであると早期にフィルタ目詰り
を生じバイパスオイルフィルタ1が作動しなくなり、一
方25μmを超えると凝集した煤でも捕捉できないため好
ましくない。また気孔径が7〜25μmであっても、該フ
ィルタを構成するろ材の厚さが1.8mmを超えるとフィル
タ目詰りを生じ、逆にろ材の厚さが0.6mm未満であると
ろ材強度が不充分であり煤捕集効果も低下するため好ま
しくない。
The pore diameter is a value according to JIS B-8356. Here, if the pore diameter is less than 7 μm, the filter is clogged early and the bypass oil filter 1 does not operate. On the other hand, if it exceeds 25 μm, even aggregated soot cannot be captured, which is not preferable. Even if the pore diameter is 7 to 25 μm, if the thickness of the filter material constituting the filter exceeds 1.8 mm, the filter is clogged, and conversely if the thickness of the filter material is less than 0.6 mm, the strength of the filter material becomes insufficient. It is not preferable because it is sufficient and the soot collecting effect is reduced.

さらにバイパスオイルフィルタ1に流れる油量の制御を
するオリフィス2の径が0.6mm未満であると煤捕集効果
が低く、一方2.0mmを超えるとフィルタ目詰りを生ずる
ため好ましくない。すなわち、オリフィス2の径が0.6
〜2.0mmであれば、さらに優れた潤滑が可能である。
Further, if the diameter of the orifice 2 for controlling the amount of oil flowing to the bypass oil filter 1 is less than 0.6 mm, the soot collecting effect is low, while if it exceeds 2.0 mm, filter clogging occurs, which is not preferable. That is, the diameter of the orifice 2 is 0.6
If it is ~ 2.0 mm, even better lubrication is possible.

なお図中符号3はフルフローオイルフィルタ、符号4は
油槽、符号5は送油ポンプである。
In the figure, reference numeral 3 is a full-flow oil filter, reference numeral 4 is an oil tank, and reference numeral 5 is an oil feed pump.

このような潤滑システムにおいて油槽4に上記の如き潤
滑油組成物を貯えておく。その潤滑油組成物は送油ポン
プ5を用いてフルフローオイルフィルタ3を通過してデ
ィーゼルエンジン各部6へ送油された後、油槽4へ戻
る。この回路でフルフローオイルフィルタり3を通過し
た潤滑油組成物の一部はバイパスオイルフィルタ1を通
過し、その際煤等の固形物が捕捉されて油槽4へ戻る。
このときバイパスオイルフィルタ1のフィルタエレメン
トを通過する油量を調節するためにオリフィス2が設け
られている。
In such a lubricating system, the lubricating oil composition as described above is stored in the oil tank 4. The lubricating oil composition passes through the full-flow oil filter 3 using the oil feed pump 5, is fed to each part 6 of the diesel engine, and then returns to the oil tank 4. In this circuit, a part of the lubricating oil composition that has passed through the full-flow oil filter 3 passes through the bypass oil filter 1, at which time solid matter such as soot is captured and returned to the oil tank 4.
At this time, an orifice 2 is provided for adjusting the amount of oil passing through the filter element of the bypass oil filter 1.

[発明の効果] 本発明によればディーゼルエンジン駆動中に不可避的に
生ずる煤などの固形不純物を凝集,粗大化し、これを特
定のバイパスオイルフィルタを用いることにより効率よ
く捕捉,除去して油中の煤量を低減することができる。
[Advantages of the Invention] According to the present invention, solid impurities such as soot and the like that are inevitably generated during the operation of a diesel engine are aggregated and coarsened, and these are efficiently captured and removed by using a specific bypass oil filter to remove the impurities in the oil. The amount of soot can be reduced.

したがって本発明によれば潤滑系へ煤などの固形不純物
が混入することを防止することができるため、カム,弁
等の動弁系の摩耗を抑制できるとともに、潤滑油自体の
劣化も抑制できる。その結果、更油期間を延長すること
ができ、メインテナンスの省力化が可能となるなどの実
益を有する。
Therefore, according to the present invention, it is possible to prevent solid impurities such as soot from being mixed into the lubricating system, so that it is possible to suppress wear of the valve operating system such as the cam and the valve, and also suppress deterioration of the lubricating oil itself. As a result, there are actual benefits such as being able to extend the oil-refreshing period and saving labor in maintenance.

それ故、本発明はディーゼルエンジン、特に高過給ディ
ーゼルエンジン,EGR装着のディーゼルエンジンの潤
滑システムとして有効に利用することができる。
Therefore, the present invention can be effectively used as a lubrication system for diesel engines, particularly highly supercharged diesel engines and diesel engines equipped with EGR.

[実施例] 次に本発明を実施例により詳しく説明する。実施例1〜
5および比較例1〜6,8,9 第1表に示す構造のバイパスオイルフィルタを有する市
販ディーゼルエンジンおよび第1表に示す潤滑油成分か
らなるディーゼルエンジン用潤滑油組成物を用いて耐久
実験し、エンジン油中の煤の量を測定して評価した。結
果を第1表に示す。また、実施例1,比較例8〜9にお
ける潤滑油中の不溶分(ASTM D 893)の量の経時変化を第
3図に示す。なお、使用したエンジンの仕様および実験
条件は下記の通りである。
[Examples] Next, the present invention will be described in detail with reference to Examples. Example 1
5 and Comparative Examples 1 to 6, 8 and 9 A durability test was conducted using a commercial diesel engine having a bypass oil filter having the structure shown in Table 1 and a lubricating oil composition for diesel engine composed of the lubricating oil components shown in Table 1. The amount of soot in the engine oil was measured and evaluated. The results are shown in Table 1. Further, FIG. 3 shows the time-dependent change in the amount of insoluble matter (ASTM D 893) in the lubricating oil in Example 1 and Comparative Examples 8 to 9. The specifications of the engine used and the experimental conditions are as follows.

使用エンジン 直列6気筒水冷ターボチャージャー付エンジン 直噴式 排気量 6 最高出力 150PS/2100rpm 実験条件 回転数 2200rpm 150PS−0PS/3sec−3secサイクル運転 油温 105℃ 燃料 軽油(2号) S分=0.45%wt 実験時間 1000時間 比較例7 実施例1においてバイパスオイルフィルタを有しない市
販ディーゼルエンジンを用いたこと以外は実施例1と同
様に実験した。結果を第1表および第3図に示す。
Engine used Inline 6-cylinder engine with water-cooled turbocharger Direct injection type Displacement 6 Maximum output 150PS / 2100rpm Experimental condition Rotational speed 2200rpm 150PS-0PS / 3sec-3sec Cycle operation Oil temperature 105 ℃ Fuel gas oil (No.2) S min = 0.45% wt Experiment time 1000 hours Comparative Example 7 An experiment was performed in the same manner as in Example 1 except that a commercial diesel engine without a bypass oil filter was used in Example 1. The results are shown in Table 1 and FIG.

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

第1図は本発明の潤滑システムの概念図、第2図は本発
明で用いるスタック式フィルタの一例を示す斜視図、第
3図は本発明の実施例1および比較例7〜9における潤
滑油中の不溶分の量の経時変化を示すグラフである。 1……バイパスオイルフィルタ, 2……オリフィス, 3……フルフローオイルフィルタ, 4……油槽,5……送油ポンプ, 6……ディーゼルエンジン各部
FIG. 1 is a conceptual diagram of a lubricating system of the present invention, FIG. 2 is a perspective view showing an example of a stack type filter used in the present invention, and FIG. 3 is lubricating oil in Example 1 of the present invention and Comparative Examples 7 to 9. It is a graph which shows the time-dependent change of the quantity of insoluble matter in. 1 ... Bypass oil filter, 2 ... Orifice, 3 ... Full-flow oil filter, 4 ... Oil tank, 5 ... Oil pump, 6 ... Diesel engine parts

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 FI 技術表示箇所 //(C10M 163/00 135:10 159:24 159:22 133:56 133:16 137:10) A 9159−4H C10N 10:04 30:04 40:25 (72)発明者 佐藤 彌之助 茨城県土浦市神立町650番地 日立建機株 式会社土浦工場内 (72)発明者 渡辺 昇 千葉県市原市姉崎2189番地1 (72)発明者 並木 喬司 埼玉県浦和市上木崎6−32−8 (72)発明者 新田 義征 神奈川県川崎市川崎区殿町3丁目25番1号 いすゞ自動車株式会社内 (56)参考文献 特開 昭60−6790(JP,A)─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display area // (C10M 163/00 135: 10 159: 24 159: 22 133: 56 133: 16 137: 10 ) A 9159-4H C10N 10:04 30:04 40:25 (72) Inventor Yanosuke Sato, 650 Kintatecho, Tsuchiura City, Ibaraki Prefecture Hitachi Construction Machinery Co., Ltd. Tsuchiura Plant (72) Inventor Noboru Watanabe Chiba Prefecture 2189, Anezaki, Ichihara-shi 1 (72) Inventor Takashi Namiki 6-32-8 Kamikizaki, Urawa-shi, Saitama (72) Yoshiyuki Nitta 3-25-1 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa Isuzu Motors Limited (56) References JP-A-60-6790 (JP, A)

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】鉱油および/または合成油からなる基油
に、(a)塩基価80以下のカルシウムスルホネート1〜
8重量%,(b)塩基価150以上のカルシウムスルホネ
ート0.5〜8重量%,(c)塩基価100以上のカルシウム
フェネート0.5〜10重量%,(d)アルケニルコハク酸イ
ミド1〜10重量%および(e)ジチオリン酸亜鉛0.5〜5
重量%を添加してなる潤滑油組成物を用い、バイパスオ
イルフィルタとしてスタック式フィルタを用いることを
特徴とするディーゼルエンジンの潤滑システム。
1. A base oil comprising a mineral oil and / or a synthetic oil, and (a) a calcium sulfonate having a base number of 80 or less.
8% by weight, (b) 0.5 to 8% by weight of calcium sulfonate having a base number of 150 or more, (c) 0.5 to 10% by weight of calcium phenate having a base number of 100 or more, (d) 1 to 10% by weight of alkenyl succinimide, and (e) Zinc dithiophosphate 0.5-5
A lubricating system for a diesel engine, characterized by using a lubricating oil composition added by weight% and using a stack type filter as a bypass oil filter.
JP61157893A 1986-07-07 1986-07-07 Diesel engine lubrication system Expired - Lifetime JPH0660317B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61157893A JPH0660317B2 (en) 1986-07-07 1986-07-07 Diesel engine lubrication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61157893A JPH0660317B2 (en) 1986-07-07 1986-07-07 Diesel engine lubrication system

Publications (2)

Publication Number Publication Date
JPS6315895A JPS6315895A (en) 1988-01-22
JPH0660317B2 true JPH0660317B2 (en) 1994-08-10

Family

ID=15659720

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61157893A Expired - Lifetime JPH0660317B2 (en) 1986-07-07 1986-07-07 Diesel engine lubrication system

Country Status (1)

Country Link
JP (1) JPH0660317B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000080388A (en) 1998-09-03 2000-03-21 Tonen Corp Lubricant composition
JP2000087067A (en) 1998-07-17 2000-03-28 Tonen Corp Lubricating oil composition for internal combustion engine
JP2015183152A (en) * 2014-03-26 2015-10-22 Jx日鉱日石エネルギー株式会社 Lubricant composition

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU549639B2 (en) * 1981-07-01 1986-02-06 Chevron Research Company Lubricating oil composition to improve fuel economy
AU550869B2 (en) * 1981-08-03 1986-04-10 Chevron Research Company Lubricating oil with borated long chain 1,2 alkane diol friction modifier
JPS606790A (en) * 1983-06-27 1985-01-14 Idemitsu Kosan Co Ltd Lubricating oil composition for diesel engine

Also Published As

Publication number Publication date
JPS6315895A (en) 1988-01-22

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