法国的雅来特兄弟设计和制造了一台电动-汽油发动机。在一台直线运动发动机中,燃烧一种汽油-空气混合燃料,使燃烧室两端的活塞向外运动,而活塞的回程则是通过一种液压制动方式来完成。因为它的活塞不豫普通发动机那样通过笨重的机械系统作用于车轮,所以能在热损耗小的情况下达到相当高和相当经济的点火频率。实际上汽油发动机是一台发电机的 The Yalate brothers in France designed and built an electric-gasoline engine. In a linear motion engine, a gasoline-air mixture is burned to move the pistons on both ends of the combustion chamber outwards, while the return stroke of the pistons is accomplished by a hydraulic braking. Because its piston does not work on a wheel with a bulky mechanical system like a normal engine, a fairly high and fairly economical ignition frequency can be achieved with little heat loss. In fact petrol engine is a generator