In order to make the catalytic converter more effective, multi-point electronic injection, electronic control ignition and electronic control of air-fuel ratio, long-life spark plugs and oxygen sensor heating have been adopted. In order to avoid poisoning by new types of catalysts, in 1992, it was required to control the phosphorus content of lubricating oil, and SH/GF-1 oil appeared. Its engine performance is not much different from SG. It is just that CMA proposed a set of slightly stricter engines to regulate the market. Data scoring standard method. However, SH oil requires that the phosphorus content in the refined oil is not more than 0.12% to prevent catalyst poisoning in automobile catalytic converters, and ILSACGF-1 was proposed by the American Automobile Manufacturers Association and the Japanese Automobile Manufacturers Association, and API is added to the SH oil. Energy saving ò, still adopt the procedure to carry on the energy saving test, but the index becomes stricter, in order to further save energy.
Because the experimental standards were not issued in time, the compromise was to maintain the standard of SJ’s phosphorus content not greater than 0.1%. Energy-saving requirements adopt more scientific procedures, and increase the requirements for energy-saving retention. Many new bench experiments were used in the development of SL. However, because the bench test engine has a history of 10 years and accessories cannot be supplied, a new bench must be developed, but the original engine performance and demanding level are basically maintained. In order to improve the oxidation performance, the óF for testing the oxidation performance is more severe than óE. In order to meet the new emission standards in 2004, the emission requirements were further reduced to no more than 1.06g/km for CO, no more than 0.125g/km for NOX, and no more than 0.078g/km for HC, so SM/GF-4 was introduced.
The automotive industry will use more precious metals as catalysts and more emission control technologies. API* has recently released GF-4 specifications, and the recommendations are roughly the same as GF-3. The dispersibility requirements in the engine performance have not changed, the oxidation performance has been improved, and the repeatability of the bench experiment has been changed to more demanding and better repeatability. However, the performance of lubricating oil stipulates that the phosphorus content is not more than 0.05% and the sulfur content is not more than 0.5%. This is the result of a closer relationship between the specifications of lubricants and environmental protection requirements.
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