GC: n

CT: A hydraulic free piston engine (HFPE) combines a diesel engine and a hydraulic pump into one compact component. In practical view there is only one linearly moving part in the HFPE, the piston assembly containing three parts, combustion and hydraulic pistons and piston rod. The piston assembly moves during operation linearly back and forth between left and right extremes by means of the fuel energy. Simultaneously hydraulic piston produces directly hydraulic energy. The HFPE enables higher power density and lower manufacturing costs than a conventional engine-pump combination. These are consequence of simpler design.

S: http://papers.sae.org/2000-01-2546/ (last access: 27 February 2015)

N: 1. In the fields of Equipment (Oil and Natural Gas Extraction), Oil Drilling and Petroleum Technology – Safety, the term in use is “ram”: A closure mechanism on a blow-out preventer stack; a hydraulically operated type of valve designed to close in a well as with a conventional valve or to close on tubing or drill pipe and maintain high pressure contact. Hydraulic pistons push the valves rams against the pipe, one ram on each side, making a pressure-tight contact.
2. Rams are of three types: blind, pipe and shear.

S: 1 & 3. TERMIUMPLUS.

SYN:
S:

CR: energy, hydraulic energy.