新型氢氧内燃微型发动机
New type of microengine using internal combustion of hydrogen and oxygen
摘要：
微系统成为日常生活的一部分，但由于缺乏将能量转化为运动的强大而快速的电机（致动器），其应用受到限制。例如，广泛使用的内燃机不能按比例缩小，因为燃烧反应在小空间中被淬灭。在这里，我们展示了一个尺寸为100 x100 x5 μ m^3的致动器，它使用氢气和氧气的内部燃烧作为其工作循环的一部分。由短电压脉冲驱动的水电解在由柔性膜封闭的腔室中产生0.5-4巴的额外压力，持续100-400微秒的时间。当脉冲被关闭时，这种压力释放得更快，允许在短周期内产生机械功。我们提供的参数，这出乎意料的快速压力下降是由于在室内的气体自燃。这个执行器是真正微型内燃机的第一步。
英文摘要：
Microsystems become part of everyday life but their application is restricted by lack of strong and fast motors (actuators) converting energy into motion. For example, widespread internal combustion engines cannot be scaled down because combustion reactions are quenched in a small space. Here we present an actuator with the dimensions 100x100x5 um^3 that is using internal combustion of hydrogen and oxygen as part of its working cycle. Water electrolysis driven by short voltage pulses creates an extra pressure of 0.5-4 bar for a time of 100-400 us in a chamber closed by a flexible membrane. When the pulses are switched off this pressure is released even faster allowing production of mechanical work in short cycles. We provide arguments that this unexpectedly fast pressure decrease is due to spontaneous combustion of the gases in the chamber. This actuator is the first step to truly microscopic combustion engines.
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