| 摘要 |
This invention concerns internal combustion engines without lubricating oil. In a 2-stroke design this means that no oil is mixed into the fuel. In a 4-stroke design the engine would not have an oil pump or an oil reservoir. Both the 2 stroke and 4 stroke engines of this invention has rotating parts that are journalled with anti-friction bearings and the engines sliding parts are lubricated with low friction materials.
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