瑞典的萨伯汽车公司在法兰克福汽车展上揭示了它的4项发动机新技术，这些新技术的目标是在降低发动机排放的同时提高发动机效率。1，活塞充当火花塞电极展出的发动机点火系统去掉了火花塞上的侧电极，取而代之以活塞顶上的一个小尖锋。活塞充当电极意味着发动机具有可变间隙火 Sweden’s Saab Motor Company unveiled at its Frankfurt Motor Show four new engine technologies that aim to increase engine efficiency while reducing engine emissions. 1, the piston acts as a spark plug Electrode on the display of the engine ignition system removed the spark plug on the side of the electrode, replaced by a small spire on the top of the piston. Pistons acting as electrodes mean that the engine has a variable gap fire