EP 0289872 A3 19900228 - PISTON WITH A VARIABLE HEADROOM
Title (en)
PISTON WITH A VARIABLE HEADROOM
Publication
Application
Priority
DE 3714762 A 19870504
Abstract (en)
[origin: EP0289872A2] The invention relates to a reciprocating piston, the variable compression height of which can be specifically varied by means of a regulating device. When used in a combustion engine, the optimum compression ratio can thereby be set for each operating point. The facility exists for reducing the compression height irrespective of pressure values acting on the piston head. In a preferred embodiment an oil-filled control chamber and damping chamber are provided whose feed and outlet ducts can be closed or opened by means of a control piston arranged in the piston pin. For positioning, the control piston is subjected to lubricating oil of varying pressure. <IMAGE>
IPC 1-7
IPC 8 full level
F02B 75/04 (2006.01); F01M 1/08 (2006.01)
CPC (source: EP)
F02B 75/044 (2013.01); F01M 2001/086 (2013.01)
Citation (search report)
- [X] WO 8601562 A1 19860313 - CASWELL DWIGHT ALLAN [US]
- [AD] DE 3416346 A1 19851107 - MAHLE GMBH [DE]
- [A] US 3185137 A 19650525 - DREYER HERMAN T
- [A] GB 2110791 A 19830622 - BRITISH INTERNAL COMBUST ENG
Designated contracting state (EPC)
DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0289872 A2 19881109; EP 0289872 A3 19900228; EP 0289872 B1 19911023; DE 3714762 A1 19881124; DE 3714762 C2 19900823; DE 3865727 D1 19911128; ES 2027337 T3 19920601
DOCDB simple family (application)
EP 88106362 A 19880421; DE 3714762 A 19870504; DE 3865727 T 19880421; ES 88106362 T 19880421