柴油比汽油能量密度更高，所以柴油发动机行程更长一些。
Diesel fuel has a higher energy density than gasoline, so a diesel engine gets better mileage.
较一个类似传统汽油发动机汽车的行程成本的两倍多的钱，提高能源电池存储量允许汽车制造商使用更小的电池组，从而降低成本。
Increasing the amount of energy that a battery stores allows an automaker to use a smaller battery pack, thereby reducing costs.
大多数发动机运转为四行程循环。
在2冲程发动机，向上中风是压缩行程。
On a 2-stroke engine, the upward stroke is the compression stroke.
曲轴转两周，发动机里的气缸完成一个作功行程。
By the time the crankshaft completes two revolutions, each cylinder in the engine will have gone through one power stroke.
如果发动机完成一个工作循环，只需要两个行程，就称为两冲程循环发动机，或者简称两冲程发动机。
If it needs only two strokes to complete a cycle, it is called a two-stroke cycle engine or, for short, a two-cycle engine.
发动机气缸的尺寸与内径和行程有关。
Bore and STROKEThe size of an engine cylinder is referred to in terms of the Bore and stroke.
在二行程发动机中，活塞起到阀门的作用，当活塞接近下止点时，使气缸壁上的进排气口打开。
In the two-cycle engine, the piston ACTS as a valve, clearing valve ports in the cylinder wall as it nears BDC.
发动机的一个工作循环分布在活塞的四个行程中，一个完整的工作循环曲轴需要转动两圈。
The cycle of operations is spread over four piston strokes. To complete the full cycle it takes two revolutions of the crankshaft.
使用滑裙活塞的原因是：短行程发动机需除去部分活塞裙部，从而为曲轴的平衡重让出空间。
One reason for the slipper piston is that, on the short-stroke, over square engine, the piston skirt had to be cut away to make room for the counterweights on the crankshaft.
该策略根据油门开度和发动机转速与离合器输出轴转速差，并通过控制离合器驱动机构的行程增量，满足驾驶员平稳、快捷的要求，同时具有所需输入信号少的特点。
The strategy controls the rotation speed difference between engine and the clutch drive mechanism distance increment. It makes it possible to satisfy the requirement of controlling smoothly and fast.
大多数发动机为四行程发动机。
由于低发动机罩和短行程发动机的进一步普及，半围延裙活塞和滑裙式活塞开始使用。
As lower hood lines and over square engines became popular, the semi-slipper and full-slipper pistons came into use.
有些发动机的飞轮标有在压缩行程的汽缸序号。
The flywheels of some engines also carry marks indicating the serial Numbers of the cylinders where the compression occurs.
在进气行程，活塞下行，进气门开启，产生真空使空气被吸进发动机。
On the intake stoke, the piston moves down and the intake valve is opened, a vacuum is produced and causes air to be drawn or pulled into the engine.
基本参数：MissionE的驱动系统，基于曾在勒芒夺冠的保时捷919原型，采用两台电力发动机驱动，可在3.5秒内从0加速至时速60英里，最大行程310英里。
The basics: Mission E's drive system, based on Porsche's Le Mans-winning 919 prototype, is powered by two electric motors that can achieve zero to 60 in less than 3.5 seconds and has a 310-mile range.
基本参数：MissionE的驱动系统，基于曾在勒芒夺冠的保时捷919原型，采用两台电力发动机驱动，可在3.5秒内从0加速至时速60英里，最大行程310英里。
The basics: Mission E's drive system, based on Porsche's Le Mans-winning 919 prototype, is powered by two electric motors that can achieve zero to 60 in less than 3.5 seconds and has a 310-mile range.
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