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The requirements for diesel engine oil will be examined in PC-10. The diesel emission standards in Europe lag behind the United States by about two years, compared with the emission standards in Europe, the United States, and Japan. Europe implemented the European emission standards in 1992 and the Euro ó emission standards in 2000. Some changes have also been made in the structure of diesel engines. Although the main focus is on increasing the power and the emission is not as close as that of the United States, to reduce nitrogen oxides and reduce particulates. Emissions have taken measures such as retarding ignition, raising the top ring, and so the amount of soot in oil has gradually increased. Of course, improving power, adopting turbocharged, intercooled, and complex electronic devices are still the focus of improvement.
The response of European diesel manufacturers is not the same as the United States to adopt an exhaust gas cycle. Of course, everyone considers the use of high-pressure injection and common-rail diesel, but other measures to improve emissions have been considered. Some use EGR (exhaust gas recirculation), so that the oil will move closer to the US PC-9, but some major automakers such as Mercedes-Benz do not use EGR, but have to use denitrification catalytic converters and particulate traps, etc. Treatment equipment, so we must use low-S fuel and use low-sulfur, low-phosphorus and low-ash lubricating oil, so how to develop but also try to wait. The Development of Japanese Diesel Engine Oil Japan's diesel engine oil mainly considers the characteristics of Japanese diesel engines. For example, it has off-board filtration devices. It has not been linked to emissions for a long time, and 70% of them are still using CD+ oil. Of course, Japan's emission requirements have been much looser than in Europe and the United States. It was not until 1998 that new specifications were proposed to reduce nitrogen oxides and increase the capacity for haze processing.
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