Lubricating oil
Lubricant is applied to the machine parts such as bearings or moving parts of the body surface of an oil-like liquid. Have to reduce friction, avoid heat, preventing machine wear and medical purposes and so on.
Generally the product of distillation of oil, refined vegetable oils have driven the. Also known as “Grease.” Non-volatile oil-like lubricant. Move according to their source, vegetable oil, petroleum and synthetic lubricants three categories. The amount of the total amount of oil and lubricants 97%, so often refers to the oil and lubricant oil. Mainly used to reduce friction between moving parts of the surface, while the equipment has cooled, sealed, corrosion, rust, insulation, power transmission, cleaning impurities and so on.
Mainly from crude engine oil distillation fractions of distillate and residue as raw material. The main performance lubricant viscosity, oxidation stability and lubrication, they are closely related to the composition of oil fractions. Viscosity is the oil flow to reflect the importance of quality indicators. Different conditions of use have different viscosity requirements.
Identification of the international oil sector over the authority of the API (American Petroleum Institute), ACEA (European Automobile Manufacturers Association), and ILSAC (International Lubricants Standards and Certification Board), JASO (Japanese Automotive Standards Organization, which is by the SAE (American Society of Automotive Engineers) Japan Chapter of the composition).
(A) Engine Oil (LE) are generally identified by API, mainly sold in the United States to API standards for motor oil can be divided into two categories: First commercial oil (Commercial engine Oil), such as the large trucks, buses, construction vehicles used in oil, most of these vehicles to diesel engine as fuel, head representative of the C word. For example: CA, CB, CC, CD, CE, CF, CG, CH, CI.
The second is the general gas station (Service Station) sold oil, commonly used in cars and a small gasoline engine vehicles (not including two-stroke motorcycle), represented by the S prefix. For example: SA, SB, SC, SD, SE, SF, SG, SH, SI. (Note: S on behalf of gasoline engine oil, C for diesel engine oil. The second level represented by the letter, the more to the back of higher level such as, SB than SA high level, SC level higher than the SB.)
(B) for the lubrication of gears including worm gears called gear oil lubricant vice (LC). Provided by GB 7631.7-89, closed industrial gear oil into the gear oil, industrial open gear oil, gear oil vehicle.
(C) for the hydrostatic pressure (hydraulic) system known as the working medium in the hydraulic oil, and used as a fluid dynamic pressure (hydraulic transmission) system is known as the working medium in the hydraulic transmission oil, usually two collectively referred to as hydraulic oil (LH). Hydraulic oil and engine oil compared with the hydraulic oil in addition to the basic properties of engine oil, but also has good anti-emulsification, abrasion resistance, hydrolytic stability, filterability, anti-foam and air release.
(D) Other oil.
Level of quality lubricants
Low-speed high-load, high speed, high load operating conditions of diesel engines using the CE-grade oil lubrication; turbo diesel engine should use CD grade and above; CF-4 for high-speed, heavy duty, long-term operation of the engine, especially for highway driving . Effectively prevent the piston ring wear, oil thickening; fuel sulfur content of less than 0.05% used CG-4 diesel engine oil; greater pressure fuel injection, a higher operating temperature bimetal piston engine, the choice of CH-4 diesel engine oil; with “low-temperature exhaust gas recirculation” system of the engine, requiring use CI-4 diesel engine oil.
High-level and low level of oil compared to the antioxidant capacity, ability to clean dispersion has been a significant increase. In addition, the valve train wear protection, anti-grease filter to prevent clogging, oil consumption and low-temperature pumpability, etc. have been significantly optimized.
At present, most diesel engine manufacturers recommended oil level with the CD, but according to China’s national conditions, such as severe overloading of vehicles, poor road conditions, drivers low degree of specialization, the sulfur content of diesel and other adverse factors of instability, resulting in engine overhaul in advance. Therefore, the high level of quality should be used oil.