Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Lubricating oil composition

a technology of lubricating oil and composition, which is applied in the direction of lubricant composition, additives, petroleum industry, etc., can solve the problems of poor fuel-saving properties, increased wear, and difficulty in lowering the viscosity of lubricating oil, so as to improve fuel-saving properties and reduce lubrication resistance

Inactive Publication Date: 2010-04-15
NIPPON OIL CORP
View PDF5 Cites 38 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0017]The lubricating oil composition of the present invention is a lubricating oil for internal combustion engines that can be enhanced in fuel-saving properties more by reducing lubrication resistance, than those of the same viscosity grade.

Problems solved by technology

Since a friction modifier such as MoDTC is extremely prevented from exhibiting its friction reduction effect when used in a diesel engine oil in which much soot contaminates and thus poor in sustainability of its fuel-saving properties, it is now important to formulate a lubricating oil composition basically not relying on the use of a friction modifier, i.e., to lower the viscosity or increase the viscosity index of a lubricating oil.
However, it is difficult to lower the viscosity of a lubricating oil for a diesel engine oil used under sever sliding conditions to the viscosity level as achieved with an SAE xW-20 grade oil because such a lower viscosity causes increased wear at sliding parts, accelerated deterioration of the oil by increased evaporation loss and aggravated exhaust gas properties (see, for example, Patent Document 2 below).
There is a limit in this technique to improve the fuel-saving properties of an engine oil throughout the initial use to a long term use.

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 composition
  • Lubricating oil composition
  • Lubricating oil composition

Examples

Experimental program
Comparison scheme
Effect test

examples

[0137]Hereinafter, the present invention will be described in more details by way of the following examples and comparative examples, which should not be construed as limiting the scope of the invention.

examples 1 and 2

, Comparative Examples 1 and 2

[0138]Asset forth in Table 1 below, various lubricating oils were prepared to measure the friction torque reduction rates thereof. The results are also set forth in Table 1.

(Friction Torque Reduction Rate Measurement)

[0139]The friction torque reduction rate measurement was carried out by measuring the friction torque of each oil under the following conditions using an engine motoring friction test.

[0140]Engine: 2 liter class in-line 4-cylinder roller type valve train engine

[0141]Engine speed: 750 to 3000 r / min

[0142]Oil temperatures: 60, 80, 100° C.

[0143]Reference oil: commercially available 5W30 oil

[0144]For evaluating the friction torque reduction rate, the friction torques measured under each of the above conditions are averaged out and compared with those of the reference oil to calculate the friction torque reduction rate.

[0145]As set forth in Table 1, it is confirmed that Example 1 wherein a base oil was blended with a styrene-diene copolymer visco...

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
viscosity indexaaaaaaaaaa
viscosity indexaaaaaaaaaa
viscosity indexaaaaaaaaaa
Login to View More

Abstract

The present invention provides a lubricating oil composition improved in fuel-saving properties by reducing lubrication resistance within the same viscosity grade oils. The lubricating oil composition comprises a lubricating base oil and a viscosity index improver with a PSSI of 30 or lower blended such that the viscosity index of the composition is 160 or greater and the 100° C. kinematic viscosity loss after shearing is 15 percent or less.

Description

FIELD OF THE INVENTION[0001]The present invention relates to lubricating oil compositions, more specifically to those improved in fuel-saving properties by reducing lubrication resistance. Further more specifically, the present invention relates to lubricating oils of SAE xW-30 grade for internal combustion engines, particularly suitable for diesel engines, which oils can be enhanced in fuel-saving properties more by reducing lubrication resistance than those of the same viscosity grade.BACKGROUND ART[0002]Engine oils have been demanded to be improved in fuel-saving properties in view of environmental issues such as reduction in carbon dioxide gas emission. Therefore, blend of friction modifiers such as MoDTC or polymeric viscosity index improvers (as disclosed in Patent Document 1 below) or lowering the viscosity or increasing the viscosity index of lubricating oil has been carried out. Since a friction modifier such as MoDTC is extremely prevented from exhibiting its friction redu...

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
Patent Type & Authority Applications(United States)
IPC IPC(8): C10M137/00C10M145/14
CPCC10M167/00C10M2203/1025C10N2230/74C10N2230/68C10N2230/45C10M2203/1065C10M2205/04C10M2207/027C10M2209/084C10M2215/064C10M2215/086C10M2219/046C10M2223/042C10N2210/02C10N2220/033C10N2230/02C10N2230/06C10M2205/06C10N2260/14C10N2010/04C10N2030/02C10N2030/06C10N2020/019C10N2030/45C10N2030/68C10N2030/74C10N2060/14
Inventor TSUJIMOTO, TEPPEIYAGUCHI, AKIRA
Owner NIPPON OIL CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com