本文介绍了四冲程摩托车发动机气门设计和选用材料的有关问题，及对发动机性能的影响。
This paper introduces the design of valves of four-stroke motorcycle engines and relating problems on material selection and their influences on engine performances.
摩托车发动机气门相位测量装置的设计开发。
Design and develop the device of motorcycle engine valve phase measuring system.
此款超声波清洗机应用范围：汽车、摩托车零件，空调压缩机零件，气门，活塞，活塞环，万向节，齿轮，变速箱等。
Applied scope: automobile, motorcycle parts, air-conditioning compressor parts, valve, piston, piston rings, universal joints, gears, gear boxes, and so on.
近代摩托车用汽油机普遍采用顶置凸轮轴结构（OHC）和组合式气门弹簧。
The overhead camshaft (OHC) and combination valve spring structure are in common use in modern motorcycle gasoline engine.
试验结果表明节气门总成能够满足摩托车对耐久性和可靠性要求；
The test results indicate that the throttle body assembly can meet the durability and reliability requirements of motorcycle.
并以摩托车发动机气门装配组件的装配为算例，证明本文提出的算法是完全可行的。
The algorithm is approved feasible through the application to the assembly of a motorcycle engine.
并以摩托车发动机气门装配组件的装配为算例，证明本文提出的算法是完全可行的。
The algorithm is approved feasible through the application to the assembly of a motorcycle engine.
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