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    • 64. 发明专利
    • Fully controlled free-piston engine
    • 完全控制的自由活塞发动机
    • JP2009002349A
    • 2009-01-08
    • JP2008179917
    • 2008-07-10
    • United States Environmental Protection Agencyユナイテッド ステイツ エンバイロメンタル プロテクション エージェンシー
    • GRAY CHARLES L JR
    • F01B1/12F02B71/04F01B11/04F01B23/08F01B25/04F01B31/14F02B1/12F04B17/05F04B19/00
    • F04B17/05F02B1/12F02B71/04F04B19/003
    • PROBLEM TO BE SOLVED: To stop a combustion piston and a pumping piston at such a position as to provide the combustion piston with a proper top dead center position.
      SOLUTION: The device comprises at least one duel piston assembly. When the pumping pistons 15 and 16 move from a bottom dead center to a top dead center, fluid is sucked at low pressure through a low pressure fluid suction valve into a fluid pressure cylinder 12. When the pumping pistons move from the top dead center to the bottom dead center, fluid is discharged at high pressure that is higher than the low pressure. A position indicator on the duel piston assembly is read, and a position signal is generated. Based on the position signal, an electronic control unit determines a stop position of the duel piston assembly with which a target compression ratio is provided. The electronic control unit generates an instruction signal for closing the low pressure fluid suction valve at a constant stroke so as to stop the duel piston assembly at the instructed stop position. The target compression ratio is thus achieved by extracting force of fluid pressure.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:将燃烧活塞和泵送活塞停止在使得燃烧活塞具有适当的上止点位置的位置。 解决方案:该装置包括至少一个对准活塞组件。 当抽吸活塞15和16从下死点移动到上止点时,流体通过低压流体吸入阀在低压下被吸入流体压力缸12.当泵送活塞从上死点移动到 下死点,流体在高于低压的高压下排出。 读取对准活塞组件上的位置指示器,并产生位置信号。 基于位置信号,电子控制单元确定提供目标压缩比的对准活塞组件的停止位置。 电子控制单元以一定的行程产生用于关闭低压流体吸入阀的指示信号,以便在指示的停止位置停止对准活塞组件。 因此,通过提取流体压力的力来实现目标压缩比。 版权所有(C)2009,JPO&INPIT
    • 66. 发明专利
    • JP2008531915A
    • 2008-08-14
    • JP2007557132
    • 2006-02-21
    • F02B71/04F02B1/12F02B41/10F02B75/28F02C6/00F02D13/02F02D15/02
    • A four-cycle, four-cylinder, premixed charge compression ignition internal combustion reciprocating free piston engine with a variable piston stroke and a compression ratio that varies as needed to provide charge ignition, to offer the potential of higher efficiency, lower emissions, and multi-fuel operation. The engine does not have a crankshaft, and therefore does not provide direct rotary output. Instead its free pistons oscillate, in a manner similar to a two cycle free piston engine. For many applications, such as piston pumps and compressors, the engine provides an output directly driven by the oscillating pistons. In other applications, such as but not limited to use as a gas generator for a power turbine, the engine provides an indirect means of producing rotary power. When the engine is used with high-speed power turbines, the power turbine may be directly coupled to a high-speed alternator for electrical power output.