Unlock instant, AI-driven research and patent intelligence for your innovation.

Lubricating oil compositions

A lubricating oil composition, the technology of the composition, applied in the directions of lubricating composition, petroleum industry, additives, etc., can solve the problems of low friction performance, depletion of organic molybdenum compounds or metal detergents, low friction characteristics, etc.

Inactive Publication Date: 2005-09-21
NIPPON OIL CO LTD
View PDF2 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reduction of metal content (reduced ash content) and sulfur content in general-purpose low-friction lubricating oils such as fuel-type engine oils has not been sufficiently studied
It has been realized that sulfur-containing compounds as mentioned above can in fact significantly improve oxidation stability, but under the influence of sulfuric acid produced by their own deterioration or decomposition, they lead to the depletion of organic molybdenum compounds or metal detergents, and therefore have a negative effect on There will be some limitations in maintaining the initial low-friction characteristics for a long time
That is, conventional methods have limitations in providing engine oils that have excellent low friction properties, can achieve low ash and low sulfur contents, and have improved long-drain performance than before

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lubricating oil compositions
  • Lubricating oil compositions
  • Lubricating oil compositions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0210] Examples 1 and 2, Comparative Example 1, and Reference Example 1

[0211] Lubricating oil compositions of the present invention (Examples 1 and 2) and lubricating oil compositions for comparison (Reference Example 1 and Comparative Example 1) were prepared according to the formulations shown in Table 1.

[0212] The following performance evaluation tests were carried out on the obtained compositions.

[0213] (1) Overall engine idling friction test

[0214] For the lubricating oil compositions shown in Table 1, a whole engine idling friction test was performed under the following conditions in order to measure the torsional force reduction rate (%) relative to the lubricating oil composition of Comparative Example 1 used as a reference oil. The results are shown in Table 1.

[0215] Engine valve train system: DOHC, direct trigger barrel valve train system

[0216] Oil temperature: 80°C, 95°C

[0217] Engine speed: 750-1,500rpm

[0218] (2) Valve train friction test...

Embodiment 3-7 and comparative Embodiment 2-4

[0237] Lubricating oil compositions of the present invention (Examples 3-7) and lubricating oil compositions for comparison (Comparative Examples 2-4) were prepared according to the formulations shown in Tables 2 and 3.

[0238] The following performance evaluation tests were carried out on the obtained compositions.

[0239] (3) Overall engine idling friction test

[0240] For the lubricating oil compositions shown in Table 2, a whole engine idling friction test was performed under the following conditions in order to measure the torsional force reduction rate (%) relative to the lubricating oil composition of Comparative Example 3 used as a reference oil. The results are shown in Table 2.

[0241] Engine valve train system: DOHC, direct trigger barrel valve train system

[0242] Oil temperature: 80°C, 95°C

[0243] Engine speed: 750-3,000rpm

[0244] (4) Valve train friction test

[0245] For the lubricating oil compositions shown in Table 3, a valve train friction test...

Embodiment 8-11

[0275] Examples 8-11, Comparative Examples 5-7, and Reference Examples 2 and 3

[0276] Lubricating oil compositions of the present invention (Examples 8-11) and lubricating oil compositions for comparison (Comparative Examples 5-7 and Reference Examples 1 and 2) were prepared according to the formulations shown in Table 4.

[0277] The friction performance test was carried out on the obtained composition under the following conditions: wherein the load was 400N, the oscillation frequency was 50Hz, the stroke was 1.5mm, and the oil temperature was 80°C, using a high-frequency, linear vibration SRV tribometer from Optimol Instruments. The results are shown in Table 4.

[0278] implement

Example 8

implement

Example 9

implement

Example 10

implement

Example 11

contrast real

Example 5

contrast real

Example 6

contrast real

Example 2

contrast real

Example 3

contrast real

Example 7

lubricating base oil 1) ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Kinematic viscosityaaaaaaaaaa
Base valueaaaaaaaaaa
Login to View More

Abstract

A lubricating oil composition excellent in friction -reducing effect and long-drain performance (leading to a longer period of service) and particularly suitable for internal combustion engines, which comprises a lube base oil, a specific phosphorus compound in an amount of 0.005 to 0.5 % by mass based on the whole of the composition in terms of phosphorus, and at least one additive selected from the group consisting of (C) metallic detergents, (D) ashless dispersants, and (E) antioxidants, and further contains (F) a sulfur-containing organomolybdenum complex and (G) an ashless friction modifier and which satisfies prescribed requirements and has a sulfated ash content not exceeding a specified level.

Description

technical field [0001] The present invention relates to lubricating oil compositions, and more particularly to lubricating oil compositions having excellent low-friction properties and enhanced long-drain properties particularly suitable for internal combustion engines. Background technique [0002] Lubricants are commonly used in internal combustion engines and automatic transmissions to make them work smoothly. In particular, lubricating oils (engine oils) for internal combustion engines are required to have high characteristic properties due to improvement in performance, increase in output, and use under severer operating conditions of recently developed engines. Therefore, general-purpose engine oils are mixed with various additives such as anti-wear agents, metal detergents, ashless dispersants, and antioxidants for satisfying required properties. Because fuel-based engine oils have greater energy losses at the frictional parts of the engine associated with the oil, s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C10M141/10C10M163/00C10M167/00
CPCC10N2230/74C10M2215/28C10M2223/04C10N2210/06C10N2230/45C10M2219/068C10M2223/043C10M2215/064C10N2230/72C10M2207/289C10M2209/103C10M169/044C10N2230/42C10M2203/1006C10M2215/086C10M2207/262C10M169/048C10N2210/02C10M2223/047C10M2205/02C10M2219/086C10N2210/01C10N2240/10C10M141/10C10M2207/026C10M2223/049C10M163/00C10N2230/06C10M2223/042C10M2227/09C10M2223/045C10N2010/02C10N2010/04C10N2010/12C10N2030/06C10N2030/42C10N2030/45C10N2030/72C10N2030/74C10N2040/25C10N2020/02
Inventor 八木下和宏矢口彰
Owner NIPPON OIL CO LTD