WO2010118738A3 - Free-piston internal combustion engine having intermittent free-piston lock - Google Patents

Free-piston internal combustion engine having intermittent free-piston lock Download PDF

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Publication number
WO2010118738A3
WO2010118738A3 PCT/DE2010/000432 DE2010000432W WO2010118738A3 WO 2010118738 A3 WO2010118738 A3 WO 2010118738A3 DE 2010000432 W DE2010000432 W DE 2010000432W WO 2010118738 A3 WO2010118738 A3 WO 2010118738A3
Authority
WO
WIPO (PCT)
Prior art keywords
free
piston
pistons
crank
internal combustion
Prior art date
Application number
PCT/DE2010/000432
Other languages
German (de)
French (fr)
Other versions
WO2010118738A2 (en
Inventor
Steffen KNÖFLER
Original Assignee
Knoefler Steffen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Knoefler Steffen filed Critical Knoefler Steffen
Publication of WO2010118738A2 publication Critical patent/WO2010118738A2/en
Publication of WO2010118738A3 publication Critical patent/WO2010118738A3/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B71/00—Free-piston engines; Engines without rotary main shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/28—Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders
    • F02B75/282—Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders the pistons having equal strokes

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

Contrary to the classic reciprocating engine, in a free-piston internal combustion engine according to the invention the combustion chamber (3) does not act directly on the crank piston (2), but on an interposed free piston (1)/gas spring (4) system. As a result, the volumetric work of the combustion gas is converted extremely quickly into kinetic energy of the free pistons shortly after ignition and transmitted to the crank pistons with delay and smoothed. During each power cycle, a non-positive locking apparatus (6) associates a discontinuous power cycle of the free pistons (1) to the continuous movement of the crank pistons (2), which results both in a stable free piston trajectory and in reduced heat transfer to the surrounding walls. The free-piston engine is particularly suited for use in power-generating heaters (micro-CHP) and in hybrid and electric vehicles.
PCT/DE2010/000432 2009-04-15 2010-04-13 Free-piston internal combustion engine having intermittent free-piston lock WO2010118738A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009017713.2 2009-04-15
DE200910017713 DE102009017713B4 (en) 2009-04-15 2009-04-15 Free-piston internal combustion engine

Publications (2)

Publication Number Publication Date
WO2010118738A2 WO2010118738A2 (en) 2010-10-21
WO2010118738A3 true WO2010118738A3 (en) 2012-06-07

Family

ID=42779581

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2010/000432 WO2010118738A2 (en) 2009-04-15 2010-04-13 Free-piston internal combustion engine having intermittent free-piston lock

Country Status (2)

Country Link
DE (1) DE102009017713B4 (en)
WO (1) WO2010118738A2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8413617B2 (en) 2010-11-23 2013-04-09 Etagen, Inc. High-efficiency two-piston linear combustion engine
US8453612B2 (en) 2010-11-23 2013-06-04 Etagen, Inc. High-efficiency linear combustion engine
US8662029B2 (en) 2010-11-23 2014-03-04 Etagen, Inc. High-efficiency linear combustion engine
US8997699B2 (en) * 2011-02-15 2015-04-07 Etagen, Inc. Linear free piston combustion engine with indirect work extraction via gas linkage
US9169797B2 (en) 2011-12-29 2015-10-27 Etagen, Inc. Methods and systems for managing a clearance gap in a piston engine
US9004038B2 (en) 2011-12-29 2015-04-14 Etagen, Inc. Methods and systems for managing a clearance gap in a piston engine
US9097203B2 (en) 2011-12-29 2015-08-04 Etagen, Inc. Methods and systems for managing a clearance gap in a piston engine
GB201205102D0 (en) * 2012-03-23 2012-05-09 Heatgen Ltd Combined heat and power
GB2520845B (en) * 2012-05-01 2015-12-09 Sustainable Power Ltd Micro combined heat and power unit
US10215229B2 (en) 2013-03-14 2019-02-26 Etagen, Inc. Mechanism for maintaining a clearance gap
EP3827507A1 (en) 2018-07-24 2021-06-02 Mainspring Energy, Inc. Linear electromagnetic machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE353587C (en) * 1922-05-22 Henri Georges Charles Toutee Two-stroke engine with two pistons running in opposite directions
DE1451663A1 (en) * 1963-09-07 1969-03-27 Christian Hoefer Working machine with free-flight piston engine
DE102007017033B3 (en) * 2007-04-11 2008-08-28 KNÖFLER, Steffen Free piston engine for use in e.g. hybrid vehicle, has crank piston axially movable by crank drive between upper and lower dead-centers in cylinder, where operating cycle of free-piston of engine takes pace within rotation of crank drive

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6035814A (en) 1998-11-03 2000-03-14 Christenson; Howard W. Compound combustion expansion internal combustion engine
DE10219549B4 (en) 2002-04-25 2004-03-11 Deutsches Zentrum für Luft- und Raumfahrt e.V. Free-piston combustion device with electric linear drive
US20040035377A1 (en) 2002-08-24 2004-02-26 Masachika Arao Two-stroke cycle, free piston, shaft power engine
DE10241101A1 (en) 2002-09-03 2004-03-11 Fev Motorentechnik Gmbh Method for regulating the operation of a device for generating electrical energy by means of a generator driven by means of a free-piston internal combustion engine
DE102006019582B3 (en) * 2006-04-27 2007-10-31 KNÖFLER, Steffen Two stroke free flight two way piston engine for use as e.g. serial hybrid vehicle, has separate piston devices driven in opposite directions under effect of burnable gases expanding in common combustion chamber

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE353587C (en) * 1922-05-22 Henri Georges Charles Toutee Two-stroke engine with two pistons running in opposite directions
DE1451663A1 (en) * 1963-09-07 1969-03-27 Christian Hoefer Working machine with free-flight piston engine
DE102007017033B3 (en) * 2007-04-11 2008-08-28 KNÖFLER, Steffen Free piston engine for use in e.g. hybrid vehicle, has crank piston axially movable by crank drive between upper and lower dead-centers in cylinder, where operating cycle of free-piston of engine takes pace within rotation of crank drive

Also Published As

Publication number Publication date
DE102009017713B4 (en) 2011-06-30
WO2010118738A2 (en) 2010-10-21
DE102009017713A1 (en) 2010-10-28

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