| 摘要 |
The free piston vacuum producing apparatus is an internal combustion device with no piston rod or constraining mechanism attached to the free piston. After fuel ignition the piston is rapidly propelled toward the open end of a cylinder. As the combustion gases expand, the piston's momentum propels it past the point where the pressure is equal on both sides of the piston. The pressure behind the piston drops rapidly as the piston moves forward, and a vacuum is created in the cylinder behind the piston. The cylinder is sufficiently long to allow the piston to travel to the point where its velocity goes to zero and it comes to rest. When the piston comes to a stop, the vacuum in the cylinder is secured, either by holding the piston in place or by using a mechanism to seal the open end of the cylinder. An air/gas/vapor entry port into the cylinder is then opened to allow outside air, gas, or vapors to enter the cylinder. The gases drawn into the cylinder's vacuum pass through a device, such as a turbine, in order to produce work or energy from the flowing gases. The cylinder's vacuum can thus be used as the basis for vacuum pumps, evaporators, or gas evacuation device. The cylinder's vacuum can also be used as the basis for devices that produce work or energy from the air, gas, or vapor flowing into the cylinder's vacuum. Such devices would include turbines, motors, engines, pumps, or compressors.
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