KR100250814B1 - Auto-transmission oil fpr electronic-controlled torque converter using synthetic oil - Google Patents

Auto-transmission oil fpr electronic-controlled torque converter using synthetic oil Download PDF

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KR100250814B1
KR100250814B1 KR1019970060220A KR19970060220A KR100250814B1 KR 100250814 B1 KR100250814 B1 KR 100250814B1 KR 1019970060220 A KR1019970060220 A KR 1019970060220A KR 19970060220 A KR19970060220 A KR 19970060220A KR 100250814 B1 KR100250814 B1 KR 100250814B1
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weight
automatic transmission
oil composition
transmission oil
viscosity index
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KR1019970060220A
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Korean (ko)
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KR19990039955A (en
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유성춘
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정몽규
현대자동차주식회사
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
    • C10M125/22—Compounds containing sulfur, selenium or tellurium
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
    • C10M125/24—Compounds containing phosphorus, arsenic or antimony
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Lubricants (AREA)

Abstract

PURPOSE: The titled automatic transmission oil composition obtained by adding a friction controlling agent mixed conventional ashless type additives and an ash type additive, an antioxidant and a metal cleaning dispersing agent to synthetic oil is provided, which has friction characteristics suitable for use in an electrically controlled torque converter. CONSTITUTION: This automatic transmission oil composition contains 2 to 6% by weight of a friction controlling agent, 1 to 5% by weight of an antioxidant, 2 to 5% by weight of a cleaning dispersing agent, 4 to 9% by weight of a viscosity index improver and 1 to 3% by weight of other additives. The friction controlling agent is a mixture of zincdithiophosphate and sulfur-phosphorous-based compound in a ratio of 1:1.

Description

전자제어식 토크 컨버터용 합성유계 자동변속기유 조성물Synthetic oil type automatic transmission oil composition for electronically controlled torque converter

본 발명은 전자제어식 토크 컨버터용 합성유계 자동변속기유 조성물에 관한 것으로, 보다 상세하게는 합성유에 아연 디티오포스페이트 및 황-인계 화합물을 혼합한 마찰 조정제를 비롯한 각종 첨가제를 첨가시켜 전자제어식 토크 컨버터에 적합한 마찰특성을 유지할 수 있는 자동변속기유 조성물에 관한 것이다.The present invention relates to a synthetic oil type automatic transmission oil composition for an electronically controlled torque converter, and more particularly, to various types of additives including a friction modifier in which zinc dithiophosphate and a sulfur-phosphorus compound are mixed with synthetic oil. An automatic transmission oil composition capable of maintaining suitable friction characteristics.

일반적으로, 변속기(Transmission)는 클러치와 추진축 또는 클러치와 종감속기어장치 사이에 설치되어 엔진의 동력을 자동차의 주행상태에 알맞도록 회전력과 속도를 바꾸어 구동바퀴에 전달하는 장치를 말하는데, 흔히 수동변속기와 자동변속기로 구분된다. 그 중에서 자동변속기는 수동변속기(manual transmission)에서와 같이 동력을 단속하기 위하여 필요한 클러치 조작과 주행조건에 따라 기어변속을 수동으로 선택할 필요 없이 엔진의 회전속도 및 회전력을 변화시켜 구동륜에 전달하는 변속기의 작용이 자동적으로 이루어지는 변속기를 말한다.In general, a transmission is a device that is installed between a clutch and a propulsion shaft or a clutch and a reduction gear, and transmits power of an engine to a driving wheel by changing torque and speed to suit a driving state of a vehicle. And automatic transmission. Among them, the automatic transmission does not need to manually select the gear shift according to the clutch operation and driving conditions necessary to control the power as in manual transmission. It is a transmission in which the action is automatically performed.

자동변속기에 사용되는 유체(Automatic Transmission Fluid ; 이하 "ATF" 라 약칭함)는 1) 토크 컨버터(torque converter) 내에서의 동력을 전달하는 작동유, 2) 기어 또는 베어링 등 회전요소의 윤활유, 3) 밸브, 클러치 및 브레이크 등과 같은 유압기구의 작동유 및 4) 냉각유로서 작용한다.Automatic Transmission Fluid (abbreviated as "ATF") includes: 1) hydraulic fluid that transmits power in a torque converter, 2) lubricant oil for rotating elements such as gears or bearings, and 3) 4) cooling oil and hydraulic oil of hydraulic mechanisms such as valves, clutches and brakes.

토크 컨버터는 유체를 사용하여 동력을 전달하는 장치로서 토크를 증폭하는 기능이 있으며, 컨버터는 변환기를 의미하는 것으로 엔진의 회전력 (토크)을 2∼3 배로 강하게 하는 역할과 클러치의 기능을 한다.Torque converter is a device that transmits power by using fluid and has a function of amplifying torque, and converter means a converter, which serves to strengthen the engine's torque (torque) by two to three times and functions as a clutch.

종래의 토크 컨버터는 일정한 주행조건이 되어야만 작동되었기 때문에 자동변속기유의 마찰 특성도 이 조건에 적합하도록 제조한 것을 사용하였다.Since the conventional torque converter was operated only under a certain driving condition, the friction characteristics of the automatic transmission oil were also manufactured to suit this condition.

즉 일정한 속도가 되어야만 토크 컨버터가 작동하므로 그 속도에서는 마찰계수가 낮고 계속적으로 속도가 증가함에 따라 마찰계수가 상승하도록 하기 위해 애쉬리스 타입 (ashless type)의 아연디티오포스페이트와 같은 마찰 조정제를 자동변속기유에 첨가하여 사용하였다.In other words, the torque converter only operates at a constant speed, so the friction coefficient is low at that speed and a friction modifier such as an ashless type zinc dithiophosphate is used to increase the friction coefficient as the speed is continuously increased. Used in addition to oil.

그러나 이와 같은 첨가제는 속도가 저속으로 변하면 마찰계수가 낮아져 효율이 떨어지고 마찰재와 마찰판의 계속적인 슬립 (slip)으로 인하여 그 성질이 열화되거나 분자구조가 전단되는 현상이 발생하여, 전자제어식 토크 컨버터를 사용한 변속기에 사용할 경우에는 저속에서 변속기가 작동할 때 충격 현상이 발생하고 수명 또한 단축이 된다.However, such additives have low frictional coefficients at low speeds, resulting in low efficiency and deterioration of properties or shearing of molecular structures due to continuous slippage of friction materials and friction plates. When used in transmissions, shocks occur and the service life is reduced when the transmission is operated at low speeds.

이에 본 발명자는 전자제어식 토크 컨버터에 사용하기에 적합한 마찰특성을 가지는 자동변속기유 조성물을 개발하고자 노력하여 오던중, 합성유에 종래의 애쉬리스 타입 (ashless type)의 첨가제와 애쉬 타입 (ash type)의 첨가제를 혼합하여 사용하면 토크 컨버터가 저속으로 작동할 때에도 마찰계수가 떨어지지 않고 속도가 상승하면 그와 비례하여 마찰계수가 상승하는 것을 알아 내어 본 발명을 완성하였다.Accordingly, the present inventors have been trying to develop an automatic transmission oil composition having a friction property suitable for use in an electronically controlled torque converter, the conventional ashless type of additives and ash type of synthetic oil When the additive is used in combination, the friction coefficient does not drop even when the torque converter operates at low speed, and when the speed increases, the friction coefficient increases in proportion to the present invention, thereby completing the present invention.

본 발명의 목적은 전자제어식 토크 컨버터에 사용하기에 적합한 마찰특성을 가지는 자동변속기유 조성물을 제공하는 것이다.It is an object of the present invention to provide an automatic transmission oil composition having friction characteristics suitable for use in an electronically controlled torque converter.

상기 목적을 달성하기 위하여 본 발명에서는 합성유에 종래의 애쉬리스 타입 (ashless type)의 첨가제와 애쉬 타입 (ash type)의 첨가제를 혼합한 마찰 조정제, 산화 방지제 및 금속청정 분산제 등의 첨가제를 첨가한 전자제어식 토크 컨버터용 합성유계 자동변속기유 조성물을 제공한다.In order to achieve the above object, in the present invention, the former is added with additives such as a friction regulator, an antioxidant, and a metal clean dispersant, in which a conventional ashless type additive and an ash type additive are mixed with synthetic oil. A synthetic oil type automatic transmission oil composition for a controlled torque converter is provided.

이하 본 발명을 상세히 설명하기로 한다.Hereinafter, the present invention will be described in detail.

본 발명에서는 합성유인 기유 (base oil)에 마찰조정제 2∼6 중량%, 산화방지제 1∼5 중량%, 청정분산제 2∼5 중량%, 유동점 강하제 및 점도지수 향상제 4∼9 중량% 및 기타 첨가제가 1∼3 중량% 함유된 자동변속기유 (automatic transmission oil) 조성물을 제공한다.In the present invention, base oil, which is a synthetic oil, includes 2 to 6 wt% of friction modifier, 1 to 5 wt% of antioxidant, 2 to 5 wt% of clean dispersant, 4 to 9 wt% of pour point depressant and viscosity index improver, and other additives. It provides an automatic transmission oil composition containing 1 to 3% by weight.

본 발명의 자동변속기유 조성물에서 기유 (base oil)로는 광유보다는 합성유인 XHVI (Extra High Viscosity Index), VHVI (Very High Viscosity Index) 또는 PAO (Poly-α-olefin)가 혼합되는 것이 바람직하고, PAO 를 단독으로 사용하는 것이 더욱 바람직하다.In the automatic transmission oil composition of the present invention as a base oil (base oil), it is preferable that a mixture of XHVI (Very High Viscosity Index), VHVI (Very High Viscosity Index) or PAO (Poly-α-olefin) which is a synthetic oil rather than mineral oil, PAO More preferably, is used alone.

PAO 합성유를 사용하면 전자제어식 토크 컨버터가 시내주행시와 같은 저속에서 작동함으로 인해 전단에 의한 분자구조 절단 현상을 최소화할 수 있으며, 고분자형 첨가제인 점도지수 향상제와 유동점 강하제의 사용량을 줄일 수 있다.By using PAO synthetic oil, the electronically controlled torque converter operates at the same low speed as when driving in the city, thereby minimizing the breakage of the molecular structure by shearing, and reducing the use of the polymer additive viscosity index improver and pour point depressant.

본 발명의 합성유계 자동변속기유 조성물은 저속에서 토크 컨버터가 작동할 때에도 마찰계수가 떨어지지 않고 속도 상승시 비례적으로 마찰계수가 상승하도록 하는 마찰조정제로서 애쉬리스 타입의 첨가제에 황-인 (S-P)을 에스테르화한 애쉬 타입의 첨가제를 1 : 1 로 혼합한 것을 2∼6 중량% 의 범위로 사용한다.Synthetic oil type automatic transmission oil composition of the present invention is a friction modifier so that the friction coefficient does not drop even when the torque converter is operated at a low speed, and the friction coefficient increases proportionally when the speed rises. The additive of the ash type which esterified into 1: 1 is used in 2-6 weight%.

이 때 사용되는 황(S) 화합물로는 하기 화학식 1의 디에탄올디설파이드 에스테르 (Diethanoldisulfide ester) 가 있다.The sulfur (S) compound used at this time is a diethanol disulfide ester (Diethanoldisulfide ester) of the formula (1).

Figure kpo00000
Figure kpo00000

또한 이 때 사용되는 인(P) 화합물로는 하기 화학식 2의 폴리옥시알킬렌 에스테르 포스페이트 (polyoxyalkylene ester phosphate)가 있다.In addition, the phosphorus (P) compound used at this time is a polyoxyalkylene ester phosphate of the formula (2).

Figure kpo00001
Figure kpo00001

또한 본 발명의 자동변속기유 조성물에는 마찰열에 의한 내열성 및 산화안정성을 향상시키기 위하여 산화방지제로서 t-도데실메르캅탄 0.1∼1.0 중량% 와 β-메틸나프탈렌 5∼10 중량% 를 혼합한 것을 1∼5 중량% 로 첨가한다.In addition, in the automatic transmission oil composition of the present invention, in order to improve heat resistance and oxidation stability due to frictional heat, 0.1 to 1.0 wt% of t-dodecyl mercaptan and 5 to 10 wt% of β-methylnaphthalene are mixed as an antioxidant. 5 weight% is added.

또한 본 발명의 자동변속기유 조성물에는 청정성 및 마모성 향상을 위하여 청정 분산제로서 바륨 술포네이트계 및 칼슘 술포네이트계 화합물을 혼합한 것을 2∼5 중량% 로 첨가한다.In addition, to the automatic transmission oil composition of the present invention, a mixture of barium sulfonate-based and calcium sulfonate-based compounds is added in an amount of 2 to 5% by weight in order to improve cleanability and wearability.

또한 본 발명의 자동변속기유 조성물은 유동점 강하제 및 점도지수 향상제로서 폴리이소부틸렌 (PIB)이 4∼9 중량% 로 첨가된다.In addition, in the automatic transmission oil composition of the present invention, polyisobutylene (PIB) is added in an amount of 4 to 9% by weight as a pour point lowering agent and a viscosity index improver.

기타 소포제 등의 첨가제는 기존의 자동변속기유에 사용하는 첨가제와 동일하며 1∼3 중량% 로 첨가된다.Additives such as other antifoaming agents are the same as those used in the existing automatic transmission oil and are added in an amount of 1 to 3% by weight.

이하 하기 실시예에 의하여 본 발명을 상세히 설명한다. 단 이들 실시예는 본 발명을 예시하는 것일뿐 본 발명이 실시예에 의하여 한정되는 것은 아니다.Hereinafter, the present invention will be described in detail by the following examples. However, these Examples are only for illustrating the present invention and the present invention is not limited by the Examples.

＜실시예 1＞<Example 1>

XHVI (130 N) 30 중량%, VHVI (500 N) 30 중량%, PAO 40 중량%를 혼합한 기유에 마찰조정제로 아연디티오포스페이트와 황-인계 에스테르 화합물을 1 : 1 로 혼합한 것을 5 중량% (황 화합물: 디에탄올디설파이드 에스테르, 인 화합물: 폴리옥시알킬렌 에스테르 포스페이트), 산화방지제로 t-도데실메르캅탄 0.1∼1.0 중량% 와 β-메틸나프탈렌 5∼10 중량% 를 혼합한 것을 4 중량%, 청정 분산제로서 바륨 술포네이트계 및 칼슘 술포네이트계 화합물을 1 : 1 로 혼합한 것을 4 중량%, 유동점 강하제 및 점도지수 향상제로서 폴리이소부틸렌 (PIB)을 8 중량%, 기타 소포제 등의 첨가제를 2 중량% 로 첨가하여 본 발명의 자동변속기유 조성물을 제조하였다 (표 1 참조).30 weight% of XHVI (130 N), 30 weight% of VHVI (500 N), and 40 weight% of PAO are 5 weights of a mixture of zincdithiophosphate and sulfur-phosphorous ester compound 1: 1 with a friction modifier. % (Sulfur compound: diethanol disulfide ester, phosphorus compound: polyoxyalkylene ester phosphate), 0.1-1.0 wt% of t-dodecyl mercaptan and 5-10 wt% of β-methylnaphthalene as an antioxidant 4% by weight of a barium sulfonate-based and calcium sulfonate-based compound as a clean dispersant at a weight ratio of 1: 1, 8% by weight of polyisobutylene (PIB) as a viscosity-lowering agent and viscosity index improver, other antifoaming agents, etc. Was added in an amount of 2% by weight to prepare an automatic transmission oil composition of the present invention (see Table 1).

이렇게 제조한 자동변속기유 조성물의 동점도, 점도지수, 속도별 마찰계수, 산화안정성 및 전단안정성 등의 성상을 측정하여 하기 표 2에 나타내었다.The kinematic viscosity, viscosity index, friction coefficient for each speed, oxidation stability, and shear stability of the automatic transmission oil composition thus prepared were measured and shown in Table 2 below.

＜실시예 2＞<Example 2>

XHVI (130 N) 30 중량%, VHVI (500 N) 10 중량%, PAO 60 중량%를 혼합한 기유에 마찰조정제로 아연디티오포스페이트와 황-인계 에스테르 화합물을 1 : 1 로 혼합한 것을 4 중량% (황 화합물: 디에탄올디설파이드 에스테르, 인 화합물: 폴리옥시알킬렌 에스테르 포스페이트), 산화방지제로 t-도데실메르캅탄 0.1∼1.0 중량% 와 β-메틸나프탈렌 5∼10 중량% 를 혼합한 것을 3 중량%, 청정 분산제로서 바륨 술포네이트계 및 칼슘 술포네이트계 화합물을 1 : 1 로 혼합한 것을 4 중량%, 유동점 강하제 및 점도지수 향상제로서 폴리이소부틸렌 (PIB)을 6 중량%, 기타 소포제 등의 첨가제를 2 중량% 로 첨가하여 본 발명의 자동변속기유 조성물을 제조하였다 (표 1 참조).A mixture of 30 wt% XHVI (130 N), 10 wt% VHVI (500 N), and 60 wt% PAO was mixed with zinc dithiophosphate and a sulfur-phosphorous ester compound in a weight ratio of 1: 1 as a friction modifier. % (Sulfur compound: diethanol disulfide ester, phosphorus compound: polyoxyalkylene ester phosphate), a mixture of 0.1 to 1.0 wt% of t-dodecyl mercaptan with 5 to 10 wt% of β-methylnaphthalene as an antioxidant 4% by weight of a barium sulfonate-based and calcium sulfonate-based compound as a clean dispersant, 1% by weight, 6% by weight of polyisobutylene (PIB) as a viscosity-lowering agent and viscosity index improver, other antifoaming agents, etc. Was added in an amount of 2% by weight to prepare an automatic transmission oil composition of the present invention (see Table 1).

이렇게 제조한 자동변속기유 조성물의 동점도, 점도지수, 속도별 마찰계수, 산화안정성 및 전단안정성 등의 성상을 측정하여 하기 표 2에 나타내었다.The kinematic viscosity, viscosity index, friction coefficient for each speed, oxidation stability, and shear stability of the automatic transmission oil composition thus prepared were measured and shown in Table 2 below.

＜실시예 3＞<Example 3>

PAO 를 단독으로 사용한 기유에 마찰조정제로 아연디티오포스페이트와 황-인계 에스테르 화합물을 1 : 1 로 혼합한 것을 3 중량% (황 화합물: 디에탄올디설파이드 에스테르, 인 화합물: 폴리옥시알킬렌 에스테르 포스페이트), 산화방지제로 t-도데실메르캅탄 0.1∼1.0 중량% 와 β-메틸나프탈렌 5∼10 중량% 를 혼합한 것을 2 중량%, 청정 분산제로서 바륨 술포네이트계 및 칼슘 술포네이트계 화합물을 1 : 1 로 혼합한 것을 4 중량%, 유동점 강하제 및 점도지수 향상제로서 폴리이소부틸렌 (PIB)을 5 중량%, 기타 소포제 등의 첨가제를 2 중량% 로 첨가하여 본 발명의 자동변속기유 조성물을 제조하였다 (표 1 참조).3% by weight of a mixture of zincdithiophosphate and a sulfur-phosphorous ester compound in a ratio of 1: 1 to a base oil using PAO alone (sulfur compound: diethanol disulfide ester, phosphorus compound: polyoxyalkylene ester phosphate) 2% by weight of a mixture of 0.1 to 1.0% by weight of t-dodecyl mercaptan and 5 to 10% by weight of β-methylnaphthalene as an antioxidant, and a barium sulfonate compound and a calcium sulfonate compound as a clean dispersant. 4 wt% of the mixture, 5 wt% of polyisobutylene (PIB) and 2 wt% of other antifoaming agents were added as a viscosity-lowering agent and viscosity index improver to prepare the automatic transmission oil composition of the present invention ( See Table 1).

이렇게 제조한 자동변속기유 조성물의 동점도, 점도지수, 속도별 마찰계수, 산화안정성 및 전단안정성 등의 성상을 측정하여 하기 표 2에 나타내었다.The kinematic viscosity, viscosity index, friction coefficient for each speed, oxidation stability, and shear stability of the automatic transmission oil composition thus prepared were measured and shown in Table 2 below.

하기 비교예에서는 기존의 자동변속기유 조성물을 제조하는 과정을 나타낸다.In the following Comparative Example, a process of preparing a conventional automatic transmission oil composition is shown.

비교예Comparative example

광유 (150N) 30 중량%, XHVI (130 N) 20 중량%, VHVI (500N) 50 중량% 를 혼합한 기유에 마찰조정제로 아연디티오포스페이트를 4 중량%, 산화방지제로 아민류 화합물을 2 중량%, 청정 분산제로서 칼슘 술포네이트계 화합물을 3 중량%, 유동점 강하제 및 점도지수 향상제로서 폴리메틸메타크릴레이트 (PMMA)를 10 중량%, 기타 소포제 등의 첨가제를 2 중량% 로 첨가하여 본 발명의 자동변속기유 조성물을 제조하였다 (표 1 참조).30% by weight of mineral oil (150N), 20% by weight of XHVI (130N), 50% by weight of VHVI (500N) was added 4% by weight of zinc dithiophosphate as a friction modifier and 2% by weight of amine compounds as antioxidant. 3% by weight of calcium sulfonate-based compound as a clean dispersant, 10% by weight of polymethyl methacrylate (PMMA) as a viscosity-lowering agent and viscosity index improver, and 2% by weight of additives such as other antifoaming agents. Transmission oil compositions were prepared (see Table 1).

이렇게 제조한 자동변속기유 조성물의 동점도, 점도지수, 속도별 마찰계수, 산화안정성 및 전단안정성 등의 성상을 측정하여 하기 표 2에 나타내었다.The kinematic viscosity, viscosity index, friction coefficient for each speed, oxidation stability, and shear stability of the automatic transmission oil composition thus prepared were measured and shown in Table 2 below.

비교예Comparative example 실시예 1Example 1 실시예 2Example 2 실시예 3Example 3 기유Base oil 광유 (150N)Mineral oil (150N) 3030 -- -- -- XHVI (130N)XHVI (130N) 2020 3030 3030 -- VHVI (500N)VHVI (500N) 5050 3030 2020 -- PAOPAO -- 4040 6060 100100 첨가제additive 마찰조정제Friction modifier Zn-DTP* Zn-DTP * Zn-DTP + 황-인계 화합물 (1 : 1)Zn-DTP + Sulfur-Phosphorus Compound (1: 1) 4 중량%4 wt% 5 중량%5 wt% 4 중량%4 wt% 3 중량%3 wt% 산화방지제Antioxidant 아민류 화합물Amine compounds 메르캅탄류 화합물Mercaptan compounds 2 중량%2 wt% 4 중량%4 wt% 3 중량%3 wt% 2 중량%2 wt% 청정분산제Dispersant 칼슘 술포네이트Calcium sulfonate 칼슘 술포네이트 + 바륨 술포네이트Calcium Sulfonate + Barium Sulfonate 3 중량%3 wt% 4 중량%4 wt% 4 중량%4 wt% 4 중량%4 wt% 유동점강하제점도지수향상제Pour point depressant viscosity index improver PMMAPMMA PIBPIB 10 중량%10 wt% 8 중량%8 wt% 6 중량%6 wt% 5 중량%5 wt% 기 타Other 2 중량%2 wt% 2 중량%2 wt% 2 중량%2 wt% 2 중량%2 wt% * Zn-DTP : 아연디티오포스페이트* Zn-DTP: Zinc dithiophosphate

비교예Comparative example 실시예 1Example 1 실시예 2Example 2 실시예 3Example 3 점도(100 ℃, cSt)Viscosity (100 ° C, cSt) 10.810.8 11.211.2 10.610.6 10.210.2 점도 지수Viscosity index 172172 182182 190190 196196 마찰계수Coefficient of friction 1 m/sec1 m / sec 0.1320.132 0.1290.129 0.1300.130 0.1320.132 5 m/sec5 m / sec 0.1270.127 0.1310.131 0.1330.133 0.1360.136 100 m/sec100 m / sec 0.1480.148 0.1480.148 0.1490.149 0.1500.150 산화안정성(전단가 변화율)Oxidation Stability (Sheet Change Rate) + 150 %+ 150% + 128 %+ 128% + 118 %+ 118% + 104 %+ 104% 전단안정성(점도 변화율)Shear stability (viscosity change rate) - 15 %-15% - 12 %-12% - 8 %- 8 % - 6 %-6%

이상에서 살펴본 바와 같이 본 발명의 자동변속기유 조성물의 마찰계수는 저속에서는 낮고 고속으로 갈수록 단계적으로 상승하므로 전자제어식 토크 컨버터가 작동할 때에도 충격현상이 없으며, 점도지수가 높아 온도변화에 따른 점도 변화가 적으므로 고온에서도 그 효과가 지속적으로 유지된다. 또한 산화안정성이 좋아 화학적으로 안정하며 열화에 의한 수명연장이 가능하다.As described above, the friction coefficient of the automatic transmission oil composition of the present invention is low at low speeds and gradually increases as the speed increases, so that there is no impact phenomenon even when the electronically controlled torque converter is operated. The effect is small so that the effect is maintained at high temperatures. In addition, it has good oxidation stability and is chemically stable and can extend its life due to deterioration.

또한 물리적 힘에 의한 안정성 (전단 안정성)이 향상되어 수명을 연장할 수 있고 지속적으로 마찰특성을 유지할 수 있으며, 마모특성이 향상되어 변속기의 베어링 등의 수명도 연장할 수 있으며, 마찰계수가 높아 전체적 연비 상승 효과가 있다.In addition, the stability (shear stability) by physical force can be improved to extend the service life and continuously maintain the friction characteristics, and the wear characteristics can be improved to extend the service life of the bearings of the transmission, etc. It has a fuel efficiency boost.

따라서 본 발명의 조성물은 전자제어식 토크 컨버터에 적용하기에 매우 적합한 자동변속기유 조성물이다.Therefore, the composition of the present invention is an automatic transmission oil composition which is very suitable for application to an electronically controlled torque converter.

Claims (8)

합성유인 기유 (base oil)에 마찰조정제 2∼6 중량%, 산화방지제 1∼5 중량%, 청정분산제 2∼5 중량%, 유동점 강하제 및 점도지수 향상제 4∼9 중량% 및 기타 첨가제가 1∼3 중량% 함유된 자동변속기유 (automatic transmission oil) 조성물.Base oil, which is a synthetic oil, contains 2 to 6% by weight of friction modifier, 1 to 5% by weight of antioxidant, 2 to 5% by weight of clean dispersant, 4 to 9% by weight of pour point depressant and viscosity index improver and other additives. Automatic transmission oil composition contained by weight. 제 1항에 있어서, 기유는 합성유인 XHVI (Extra High Viscosity Index), VHVI (Very High Viscosity Index) 및 PAO (Poly-α-olefin) 를 혼합하여 사용하거나 PAO 를 단독으로 사용하는 것을 특징으로 하는 자동변속기유 조성물.The method of claim 1, wherein the base oil is a synthetic oil characterized in that the use of a mixture of XHVI (Extra High Viscosity Index), VHVI (Very High Viscosity Index) and PAO (Poly-α-olefin) or PAO alone Transmission oil composition. 제 1항에 있어서, 마찰조정제는 아연디티오포스페이트 및 황-인계 화합물을 1 : 1 로 혼합한 것임을 특징으로 하는 자동변속기유 조성물.The automatic transmission oil composition according to claim 1, wherein the friction modifier is a 1: 1 mixture of zinc dithiophosphate and a sulfur-phosphorus compound. 제 3항에 있어서, 황-인계 화합물 중 황 화합물은 하기 화학식 1의 디에탄올디설파이드 에스테르 (Diethanoldisulfide ester)인 것을 특징으로 하는 자동변속기유 조성물.[4] The automatic transmission oil composition according to claim 3, wherein the sulfur compound of the sulfur-phosphorus compound is diethanol disulfide ester represented by the following formula (1). 화학식 1Formula 1
Figure kpo00002
Figure kpo00002
 제 3항에 있어서, 황-인계 화합물 중 인 화합물은 하기 화학식 2의 폴리옥시알킬렌 에스테르 포스페이트 (polyoxyalkylene ester phosphate)인 것을 특징으로 하는 자동변속기유 조성물.The automatic transmission oil composition according to claim 3, wherein the phosphorus compound in the sulfur-phosphorus compound is polyoxyalkylene ester phosphate represented by the following Chemical Formula 2. 화학식 2Formula 2
Figure kpo00003
Figure kpo00003
 제 1항에 있어서, 산화방지제는 t-도데실메르캅탄 0.1∼1.0 중량% 와 β-메틸나프탈렌 5∼10 중량% 를 혼합한 것임을 특징으로 하는 자동변속기유 조성물.The automatic transmission oil composition according to claim 1, wherein the antioxidant is a mixture of 0.1 to 1.0 wt% of t-dodecyl mercaptan and 5 to 10 wt% of β-methylnaphthalene. 제 1항에 있어서, 청정분산제는 칼슘 술포네이트계 화합물 및 바륨 술포네이트계 화합물을 혼합한 것임을 특징으로 하는 자동변속기유 조성물.The automatic transmission oil composition according to claim 1, wherein the clean dispersant is a mixture of a calcium sulfonate compound and a barium sulfonate compound. 제 1항에 있어서, 유동첨가제 및 점도지수 향상제는 폴리이소부틸렌 (PIB)인 것을 특징으로 하는 자동변속기유 조성물.The automatic transmission oil composition according to claim 1, wherein the flow additive and the viscosity index improver are polyisobutylene (PIB).
KR1019970060220A 1997-11-15 1997-11-15 Auto-transmission oil fpr electronic-controlled torque converter using synthetic oil KR100250814B1 (en)

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JPH05163496A (en) * 1991-12-13 1993-06-29 Mitsubishi Oil Co Ltd Automatic transmission fluid composition
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