摩托车二冲程发动机的配气可变机构(一)

Variable Valve Train of 2--Stroke Engine for Motorcycle

强化发动机的配气系统设计一般应首先满足发动机的外特性,但实际上摩托车大部分工作时间是在中低转速和部份负荷。配气可变机构可使发动机在较高转速和全负荷范围都能得到最佳配气,因而改善了发动机性能。文内介绍了日本雅马哈和本田公司几种配气可变机构及它们对发动机性能的影响。

Generally the external characteristic should be met first wh designing the valve train for strengthening engine. But actually most of the times, motorcycle works at low and midium speeds and under partial load. Variable valve train enables the engine to achieve the best valve timing at a very high speed and load. Thus the performance of the engine can be improved. This paper introduces to the readers several kinds of variable valve train of YAMAHA and Honda companies of Japan and also illustrates the influence of these systems on the performance of the engine.