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1. (WO2001038706) FREE-PISTON ENGINE

Pub. No.:    WO/2001/038706    International Application No.:    PCT/DE2000/003886
Publication Date: Fri Jun 01 01:59:59 CEST 2001 International Filing Date: Tue Nov 07 00:59:59 CET 2000
IPC: F01B 11/00
F02B 71/04
F02B 75/02
Applicants: MANNESMANN REXROTH AG
SCHÄFER, Rudolf
DANTLGRABER, Jörg
Inventors: SCHÄFER, Rudolf
DANTLGRABER, Jörg
Title: FREE-PISTON ENGINE
Abstract:
A free-piston engine is disclosed, whose engine piston may have a force applied, in the compression direction, by means of an hydraulic cylinder, which can, by means of a switching valve, be connected to the pressure in a high pressure storage device or a low pressure storage device. According to the invention, a valve arrangement, with a control piston, is arranged between the hydraulic cylinder and the switching valve, whose control surface controls a connection with the high pressure reservoir device.