EP0114184A2 - Commande des soupapes pour des moteurs à combustion interne avec des soupapes à piston qui s'ouvrent à l'extérieur afin d'arriver à une chambre de combustion optimale - Google Patents

Commande des soupapes pour des moteurs à combustion interne avec des soupapes à piston qui s'ouvrent à l'extérieur afin d'arriver à une chambre de combustion optimale Download PDF

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Publication number
EP0114184A2
EP0114184A2 EP83108279A EP83108279A EP0114184A2 EP 0114184 A2 EP0114184 A2 EP 0114184A2 EP 83108279 A EP83108279 A EP 83108279A EP 83108279 A EP83108279 A EP 83108279A EP 0114184 A2 EP0114184 A2 EP 0114184A2
Authority
EP
European Patent Office
Prior art keywords
valves
combustion chamber
valve
combustion
piston
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP83108279A
Other languages
German (de)
English (en)
Other versions
EP0114184A3 (fr
Inventor
Johannes Reitz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IRM ANTRIEBSTECHNIK GmbH
Original Assignee
IRM ANTRIEBSTECHNIK GmbH
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 IRM ANTRIEBSTECHNIK GmbH filed Critical IRM ANTRIEBSTECHNIK GmbH
Publication of EP0114184A2 publication Critical patent/EP0114184A2/fr
Publication of EP0114184A3 publication Critical patent/EP0114184A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L5/00—Slide valve-gear or valve-arrangements
    • F01L5/04—Slide valve-gear or valve-arrangements with cylindrical, sleeve, or part-annularly shaped valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/30—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of positively opened and closed valves, i.e. desmodromic valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group
    • 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder

Definitions

  • the temperature of the exhaust valve is very high, 700 to 800 ° C.
  • the valve disk opens against the pressure in the cylinder and, as it were, plunges into the hot exhaust gas stream. This requires a high quality material, possibly armor and much more. Nevertheless, there are no functional problems with the conventional valve train.
  • the overlap of the valves depends on the engine speed. It mainly determines the valve pocket depth in the piston. The valve pockets in turn affect crushing areas and combustion chamber. In any case, the overlap determines a free space size that somehow negatively affects the combustion chamber.
  • the high temperature of the exhaust valve determines the position of the combustion chamber and the position of the spark plug. The hot environment of the exhaust valve has a great influence on the volumetric delivery rate and essentially determines the ignition timing.
  • valve disks in the combustion chamber make a specific flow difficult and that it would be desirable to think about an improved gas exchange control in terms of flow resistance.
  • the known toggle lever (1) lends itself (see FIGS. 1 and 2).
  • the force is absorbed in the system and not by the valve train (2).
  • the toggle lever (1) is stretched a little over maximum against the stop (17). This makes the system stable. Changes in length due to expansion and wear are absorbed by resilient elements (6).
  • Fig. 1 shows a cross section in the full suction stroke
  • Fig. 2 shows a longitudinal section of the closed exhaust valve.
  • the inlet valve (19) is fully open.
  • the opening cam (5) overflows to the closing flank, at the same time the closing cam (3) runs onto its rocker arm (4). Its flank determines the movement of the rocker arm and thus the toggle lever (1).
  • the trailing edge of the opening cam (5) now has play.
  • the valve (19) or (20) comes on shortly before the toggle lever goes into the extended position.
  • the cam (3) presses the toggle lever (1) approx. 1 ° over the extended position and pre-tensions the valve by a certain amount.
  • the locking cam (3) now runs with play between the flank and the rocker arm.
  • the opening cam (5) runs with its flank onto the rocker arm (4). It now determines the movement of the knee lever.
  • the kinematics are such that the opening takes place at a higher speed than the closing.
  • the pressure of the exhaust gases supports the opening of the exhaust valve and the high temperature of the exhaust gases has less possibility of heating the exhaust piston valve (20). This meets the desire to be able to drive an effectively higher compression.
  • the movement of the inlet valve piston (19) supports the intake process when opening and closing.
  • Fig. 3 shows a section through a possible piston crown shape in TDC and the top view thereof with the piston valves (35) and (36) adapted to the combustion chamber shape.
  • the compressed mixture can flow from the narrowing pinch gaps of the pinch zones into the channel cross-sections (32) that widen in the direction of flow.
  • the mixture is conducted in the channels (33), which can also have a curved shape, in the tangential direction into the combustion bowl (34) and ignited.
  • the test must show channel depths, number and course as well as the cheapest form of the burner.
  • a major advantage is that the swirl (see Fig. 3) is steered so that components with a higher mass (not completely evaporated fuel particles) are conveyed into the combustion bowl.
  • the mass particles are naturally carried outwards against the cylinder wall, where, according to film observations, no exact combustion takes place. Inflammation of such particles in the combustion bowl is more likely.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)
EP83108279A 1983-01-14 1983-08-23 Commande des soupapes pour des moteurs à combustion interne avec des soupapes à piston qui s'ouvrent à l'extérieur afin d'arriver à une chambre de combustion optimale Withdrawn EP0114184A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833301007 DE3301007A1 (de) 1983-01-14 1983-01-14 Gaswechselsteuerung fuer brennkraftmaschinen mit nach aussen oeffnenden kolbenventilen zur erlangung eines optimalen brennraumes
DE3301007 1983-01-14

Publications (2)

Publication Number Publication Date
EP0114184A2 true EP0114184A2 (fr) 1984-08-01
EP0114184A3 EP0114184A3 (fr) 1984-11-07

Family

ID=6188243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83108279A Withdrawn EP0114184A3 (fr) 1983-01-14 1983-08-23 Commande des soupapes pour des moteurs à combustion interne avec des soupapes à piston qui s'ouvrent à l'extérieur afin d'arriver à une chambre de combustion optimale

Country Status (2)

Country Link
EP (1) EP0114184A3 (fr)
DE (1) DE3301007A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2562156A1 (fr) * 1984-04-03 1985-10-04 Honda Motor Co Ltd Systeme de soupape pour un moteur a combustion interne
DE4210764A1 (de) * 1992-04-01 1993-10-07 Daimler Benz Ag Brennkraftmaschine mit einem Kolbenschieber
WO2001061155A1 (fr) * 2000-02-16 2001-08-23 S.L.V. Valve Technologies Ltd. Organe moteur a soupapes sans ressort
ITBI20110007A1 (it) * 2011-06-09 2011-09-08 Gianni Olivari "dispositivo di aspirazione ed espulsione sostituente le valvole "

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19537028A1 (de) * 1995-10-05 1997-04-10 Iav Gmbh Walzenförmiger Brennraum, vorzugsweise für Dieselmotoren
DE102011078556B3 (de) * 2011-07-01 2012-11-08 Norbert Kuhl Ventilbetätigungsvorrichtung einer kolbendampfmaschine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB314550A (en) * 1928-06-29 1930-10-29 Louis Broadwell Thoms Improvements in or relating to internal combustion engines
FR41200E (fr) * 1931-12-30 1932-12-01 Moteur à combustion interne
DE898380C (de) * 1951-07-14 1953-11-30 Demag Ag Durch das Betriebsmittel gesteuertes Ventil fuer Kolbenkraftmaschinen fuer unter Druck stehende gas- oder dampffoermige Betriebsstoffe
BE706260A (fr) * 1967-11-09 1968-03-18
FR2313555A1 (fr) * 1975-06-04 1976-12-31 Laurent Narcisse Soupape miracle
DE3123527A1 (de) * 1980-11-27 1982-06-24 Volkswagenwerk Ag, 3180 Wolfsburg "hubkolben-brennkraftmaschine mit oelraeumen zur kuehlung"
FR2518166A1 (fr) * 1981-12-16 1983-06-17 Daimler Benz Ag Dispositif de guidage de la tige d'une soupape dans un moteur a combustion interne

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB314550A (en) * 1928-06-29 1930-10-29 Louis Broadwell Thoms Improvements in or relating to internal combustion engines
FR41200E (fr) * 1931-12-30 1932-12-01 Moteur à combustion interne
DE898380C (de) * 1951-07-14 1953-11-30 Demag Ag Durch das Betriebsmittel gesteuertes Ventil fuer Kolbenkraftmaschinen fuer unter Druck stehende gas- oder dampffoermige Betriebsstoffe
BE706260A (fr) * 1967-11-09 1968-03-18
FR2313555A1 (fr) * 1975-06-04 1976-12-31 Laurent Narcisse Soupape miracle
DE3123527A1 (de) * 1980-11-27 1982-06-24 Volkswagenwerk Ag, 3180 Wolfsburg "hubkolben-brennkraftmaschine mit oelraeumen zur kuehlung"
FR2518166A1 (fr) * 1981-12-16 1983-06-17 Daimler Benz Ag Dispositif de guidage de la tige d'une soupape dans un moteur a combustion interne

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2562156A1 (fr) * 1984-04-03 1985-10-04 Honda Motor Co Ltd Systeme de soupape pour un moteur a combustion interne
DE4210764A1 (de) * 1992-04-01 1993-10-07 Daimler Benz Ag Brennkraftmaschine mit einem Kolbenschieber
WO2001061155A1 (fr) * 2000-02-16 2001-08-23 S.L.V. Valve Technologies Ltd. Organe moteur a soupapes sans ressort
ITBI20110007A1 (it) * 2011-06-09 2011-09-08 Gianni Olivari "dispositivo di aspirazione ed espulsione sostituente le valvole "

Also Published As

Publication number Publication date
EP0114184A3 (fr) 1984-11-07
DE3301007A1 (de) 1984-07-26

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Inventor name: REITZ, JOHANNES