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 PDFInfo
- 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- Withdrawn
Links
Images
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)
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)
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)
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)
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 |
-
1983
- 1983-01-14 DE DE19833301007 patent/DE3301007A1/de not_active Withdrawn
- 1983-08-23 EP EP83108279A patent/EP0114184A3/fr not_active Withdrawn
Patent Citations (7)
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)
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): FR GB IT SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Designated state(s): FR GB IT SE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19850709 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: REITZ, JOHANNES |