| 摘要 |
<p>A free piston internal combustion engine (10) includes a housing (12) with a combustion cylinder (18) and a hydraulic cylinder (20). A piston (14) includes a piston head (32) reciprocally disposed within the combustion cylinder (18) and movable during a compression stroke to a top dead center position and during a return stroke to a bottom dead center position. A plunger head (46) is reciprocally disposed within the hydraulic cylinder (20). A plunger rod (34) interconnects and is substantially rigidly affixed to each of the piston head (32) and the plunger head (46). The plunger head (46) and the hydraulic cylinder (20) define a variable volume pressure chamber (50) on a side of the plunger head (46) generally opposite the plunger rod (34). At least one valve (HPP, HPC, MSS, MSP) interconnects a hydraulic accumulator (H) with the pressure chamber (50) during a portion of the compression stroke to act on the plunger head (46) and thereby move the piston head (32) toward the top dead center position, and interconnects the hydraulic accumulator (H) with the pressure chamber (50) during substantially all of the return stroke to pressurize the hydraulic accumulator (H) during movement of the piston head (32) toward the bottom dead center position.</p> |
