| 摘要 |
An internal combustion driven fluid pumping apparatus for accumulating fluid pressure to be applied against a load includes a two-stroke combustion cylinder having a piston drivingly connected to a piston of a linearly disposed compression cylinder, which is in turn connected by a fluid conduit to a pressure accumulator. The accumulator is operatively connected to the compression cylinder such that the frequency of cycles of the combustion cylinder varies with the changes in the demand of the load upon the fluid pressure stored in the accumulator, and such that the speed of the pistons in each individual stroke is substantially constant. To begin each cycle, fluid is forced into the compression cylinder at a pressure less than the pressure of fluid in the accumulator, but sufficient to compress and ignite combustible gases in the combustion cylinder. A transmission system is also provided wherein a variable volume hydraulic pump including a pump shaft drivingly connected to the load is driven by the shaft of a hydraulic motor, which is in turn driven by a high pressure fluid source. Fluid conduits connect the low pressure output of the motor to the low pressure input of the pump, and the high pressure output of the pump to the high pressure input of the motor, or to an accumulator. The displacement of the pump can be varied to vary the torque transmitted to the load, while maintaining the torque of the motor at a substantially constant rate.
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