Opposed piston type free piston engine pump unit

Details Opposed piston type free piston engine pump unit Opposed piston type free piston engine pump unit

1980-11-03

1983-05-10

Smith, Leonard E.

Pumps

Condition responsive control of pump drive motor

By controlling free piston internal combustion engine

417314, 417324, 417341, 417504, F04B 3500

Patent

active

043827489

ABSTRACT:
A free piston engine pump (FPEP) converts combustion energy into hydraulic power in an efficient, controlled and relatively uncomplicated manner, for example, for vehicle propulsion, auxiliary system power, etc. The FPEP is substantially naturally mass balanced having opposed engine pistons driving respective in-line hydraulic pumps. An adjustable accumulator with a deformable fluid-tight chamber containing a compressible fluid stores and delivers energy for compression, and an arrangement of control valves and check valves enables selective operation of the FPEP in primary (high flow) and secondary (high pressure) modes. Plural FPEP's may be interfaced for parallel operation sharing common elements and functions. Cycle rate, intermittent operation and start-up also may be controlled. Electronic monitoring and control of one or more operational parameters of a FPEP also are disclosed.

REFERENCES:
patent: 1722425 (1929-07-01), Junkers
patent: 2078157 (1937-04-01), Pescara
patent: 2079289 (1937-05-01), Janicke
patent: 2749845 (1956-06-01), Bahniuk
patent: 2978986 (1961-04-01), Carder et al.
patent: 3092958 (1963-06-01), Duncan
patent: 3125282 (1964-03-01), Janicke
patent: 3129878 (1964-04-01), Kosoff
patent: 3159330 (1964-12-01), Boldt
patent: 3170406 (1965-02-01), Robertson
patent: 3432088 (1969-03-01), Steiger
patent: 3606591 (1971-09-01), Potma
patent: 3853100 (1974-12-01), Braun

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