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Internal combustion driven pumping system and variable torque transmission
| Details |
Inventors: Clark, Garry E.;
Assignee:
Primary Examiner:
Assistant Examiner:
Attorney, Agent or Firm:
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 fluid-driven power plant is disclosed including a motor and a combustion energy input device combined in a closed, pressurized system. 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. 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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DETAILED DESCRIPTION Referring now in more detail to the drawing, in which like reference numerals refer to like parts throughout the several views, FIG.
1 shows a schematic hydraulic circuit diagram of an internal combustion driven fluid pumping apparatus 10 embodying the present invention.
The apparatus 10 includes an accumulator 12 for storing the energy of fluid compressed by the apparatus.
Fluid under pressure may be withdrawn from the accumulator 12 and applied to a load through a high pressure conduit 13, via a valving or transmission system (not shown) in FIG.
1.
The apparatus 10 also includes a combustion cylinder 15 surrounded by a layer of insulation 16.
The insulation 16 can be any suitable known insulating material capable of sustaining the heat generated by combustion of fluid fuel in the combustion cylinder 15.
The combustion cylinder 15 includes a head 17 which defines a plurality of openings for intake and exhaust functions shown in FIG.
2, and described in detail below.
A combustion cylinder piston 18 is mounted within the cylinder 15 for reciprocating movement in a conventional manner.
A compression cylinder 20, comprising a conventional hydraulic cylinder, is disposed in linear relationship with the combustion cylinder 15.
A compression cylinder piston 21 is mounted for reciprocating movement within the compression cylinder 20, and is directly connected to the combustion cylinder piston 18 by a connecting rod 23.
A return spring 24 urges the connecting rod 23, and therefore the compression piston 21 and the combustion piston 18, toward the compression cylinder 20, thereby tending to force fluid out of the compression cylinder 20 and draw the combustion piston 18 away from the cylinder head 17.
Movement of the connecting rod 23 is confined and facilitated by a linear bearing 25, through which the connecting rod passes.
A mass 26 is mounted for travel with the connecting rod 23.
The mass is sufficiently massive to smooth the movement of the pistons and connecting rod following the impulse of force from combustion of fuel in the combustion cylinder 15
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