EP1022444B1 - Hydraulisch geregelte, zwangsgesteuerte Ventilhubbetätigung für einen Mehrventilzylinderkopf - Google Patents
Hydraulisch geregelte, zwangsgesteuerte Ventilhubbetätigung für einen Mehrventilzylinderkopf Download PDFInfo
- Publication number
- EP1022444B1 EP1022444B1 EP99122366A EP99122366A EP1022444B1 EP 1022444 B1 EP1022444 B1 EP 1022444B1 EP 99122366 A EP99122366 A EP 99122366A EP 99122366 A EP99122366 A EP 99122366A EP 1022444 B1 EP1022444 B1 EP 1022444B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- piston
- cylinder
- cylinder unit
- bore
- 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.)
- Expired - Lifetime
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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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
- F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
- F01L1/183—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft of the boat type
-
- 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
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
-
- 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
- F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
Definitions
- the invention relates to a hydraulically controlled, positively controlled Valve lift operation for a multi-valve cylinder head with integrated valve clearance compensation according to the preamble 'of claim 1.
- valve train is formed from a first piston-cylinder unit. This in turn exists from a cylinder in which a piston is arranged axially movable and the piston is actuated by the cam.
- a hydraulic pressure in a second piston-cylinder unit on a Piston acts, which the inlet valve against the restoring force of a valve spring opens.
- At low speed it is desirable to have only one intake valve each Open cylinder.
- the pressure chamber in the cylinder of the first Piston-cylinder unit via an electric solenoid valve and a hole with connected to a surge tank, so that build up no hydraulic pressure can.
- a first inlet valve remains in a lower one under these circumstances Speed range closed.
- the solenoid valve is controlled by the electronic engine control unit.
- a valve control of the type mentioned allows it at low speed only to open a first intake valve and the second intake valve only in the higher Open speed range. Disadvantage is the high construction costs and the mandatory electronic board management. (EP 0 803 642 A1)
- the object of the invention is to make the valve train in internal combustion engines with at least two intake valves without significant change in the mechanics and electronic board management so that an intake valve is closed to improve the twist in the combustion chamber at low engine speeds and both intake valves are opened only at higher speeds ,
- piston-cylinder unit one is able to turn off a valve, so that the flow rate of the intake air even at low speed too an increase of the twist leads to achieve a good combustion.
- An advantageous embodiment of the piston-cylinder unit is the claim 2 remove. Through this training, a valve clearance compensation can be realized become.
- the illustrated valve lift actuator comprises two inlet valves 1,2.
- the first intake valve 1 is designed so that ß it is constantly activated, whereas the second intake valve 2 opens only from a predetermined speed of the engine. At low speed, the second inlet valve 2 is closed, so that during the suction stroke when the first inlet valve is opened alone, higher inlet velocities and thus increased swirl are achieved for better mixture formation.
- the two intake valves 1, 2 each have a piston-cylinder unit 3a, 3b of which, because of the same structure, only the first intake valve 1 will be explained.
- the piston-cylinder units 3a, 3b each consist of a piston 4, which forms a structural unit with a spring plate 5.
- the piston 4 is guided in a pressure sleeve 6 which is held by spring 7 in the initial position.
- the pressure sleeve 6 in turn is guided in a guide sleeve 8, which presses on a valve spring 9.
- the piston 4 is provided with a central bore 10 which is provided with a check valve 11. Via the piston bore 10, a cylinder chamber 12 lubricating oil can be supplied. The supply of the lubricating oil takes place from a rocker arm shaft 13, which has a bore 14. Starting from this bore 14, the lubricating oil passes through holes 15, 16, 17, 18 in the pressure chamber 12. To prevent backflow is in bore 18, a check valve 19 is provided.
- a valve bridge 20 presses against the piston 4. Pressure in the pressure chamber 12 builds up after closing the check valve 11, which opens the inlet valve 1 against the force of the valve spring 9 via the pressure sleeve 6 and the guide sleeve 8.
- the second intake valve 2 only at higher speed of Open internal combustion engine. This is accomplished by an inertia valve 20a.
- This consists of a valve body 21 with transverse bore 23.
- Der Valve body 21 is axially slidably guided in the valve bridge 20 and is by a compression spring 24 in a Held position in which a bore 25 is closed, which the connection the second piston-cylinder unit 3b with the lubricating oil circuit manufactures.
- at sealed bore 25 is the pressure chamber of the piston of the second piston-cylinder unit 3b without oil.
- Upon actuation of the valve bridge 20 transmits this their Movement first on the valve plate 5 and the guide sleeve 8. Since in the pressure chamber there is no oil, there is no movement of the pressure sleeve 6.
- the guide sleeve 8 slides only along the pressure sleeve 6, a transmission of the movement of the pressure sleeve 6 on the valve stem 29 is excluded.
- the acceleration of the valve bridge 20 assumes higher values as a result of actuation by a rocker arm 26, becomes the valve body 21 by the inertia force against the restoring force the compression spring 24 moves upward and the transverse bore 23 are above the bore 25, the piston bore 10 and the check valve 11 the way of the lubricating oil free to the second piston-cylinder unit 3b, so that this as well as the piston-cylinder unit 3a can fill and the second inlet valve opens.
- the valve body 21 and the compression spring 24 is a vibratory system is in the Valve bridge 20 still a throttle bore 28 required to the vibration to To bring it to an end
- a special feature therefore contains the piston-cylinder unit 3a is still a displacer 27 to the cylinder space small and thus to minimize the loss of travel due to the compressibility of the lubricating oil.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
Claims (2)
- Hydraulisch geregelte, zwangsgesteuerte Ventilhubbetätigung eines Mehrventilzylinderkopfes mit integriertem Ventilspielausgleich mit mindestens zwei Einlaßventilen (1, 2) bei der jedes Einlaßventil über eine Ventilbrücke (20) unter Zwischenschaltung einer Kolben-Zylindereinheit,(3a, 3b) betätigbar, oder abschaltbar ist und jede Kolben-Zylindereinheit (3a, 3b) über Bohrungen (14) in der Kipphebelwelle (13) dem Kipphebel (26) und der Ventilbrücke (20) mit einem Schmierölkreislauf der Brennkraftmaschine kommuniziert, sowie die Kolben - Zylindereinheiten (3a, 3b) je ein Rückschlagventil (11) aufweisen, derart, daß bei Ventilbetätigung ein Rückströmen von Öl aus dem Zylinderraum verhindert wird, dadurch gekennzeichnet, daß die Ventilbrücke (20) ein Massenträgheitsventil (20a) aufweist, welches in seiner Ruhestellung die zweite Kolben-Zylindereinheit (3b) vom Schmierölkreislauf trennt und welches bei Überschreitung einer vorgegebenen Motordrehzahl durch die Trägheit seines Ventilkörpers (21) gegen die Kraft einer Druckfeder (24) die Verbindung mit dem Schmierölkreislauf herstellt, so daß in dieser Stellung die zweite Kolben-Zylindereinheit (3b) das zweite Einlaßventil (2) betätigen kann, während die erste Kolben-Zylindereinheit (3a) ständig mit Öl versorgt wird und das erste Einlaßventil (1) permanent bedient.
- Zwangsgesteuerte Ventilhubbetätigung nach Anspruch 1, dadurch gekennzeichnet, daß die baugleichen Kolben-Zylindereinheiten (3a, 3b) aus einem Kolben (4) gebildet werden, welche eine bauliche Einheit mit dem Federteller (5) bilden und der Federteller auf eine Führungshülse (8) drückt, welche die Ventilfeder (9) belastet und die Führungshülse (8) in einer Druckhülse (6) axial geführt und diese mittels Feder (7) in Position gehalten wird, daß der Kolben (4) eine Kolbenbohrung (10) mit Rückschlagventil (11) aufweist und die Kolbenbohrung (10) der zweiten Kolben-Zylindereinheit (3b) über eine Querbohrung (23) im Massenträgheitsventil (20a) und eine Bohrung (25) in der Ventilbrücke (20) mit dem Schmierölkreislauf verbunden ist, wobei die Querbohrung (23) durch das Massenträgheitsventil (20a) drehzahlabhängig geöffnet bzw. abgesperrt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19858213 | 1998-12-17 | ||
DE19858213A DE19858213A1 (de) | 1998-12-17 | 1998-12-17 | Hydraulisch geregelte, zwangsgesteuerte Ventilhubbetätigung für einen Mehrventilzylinderkopf mit integriertem Ventilspielausgleich |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1022444A2 EP1022444A2 (de) | 2000-07-26 |
EP1022444A3 EP1022444A3 (de) | 2001-01-31 |
EP1022444B1 true EP1022444B1 (de) | 2003-04-16 |
Family
ID=7891390
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99122366A Expired - Lifetime EP1022444B1 (de) | 1998-12-17 | 1999-11-10 | Hydraulisch geregelte, zwangsgesteuerte Ventilhubbetätigung für einen Mehrventilzylinderkopf |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1022444B1 (de) |
DE (2) | DE19858213A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012155315A1 (zh) * | 2011-05-18 | 2012-11-22 | 上海尤顺汽车部件有限公司 | 一种重置式摇臂制动方法和装置 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BRPI0508691A (pt) | 2004-03-15 | 2007-09-18 | Jacobs Vehicle Systems Inc | ponte de válvula com sistema de movimento perdido integrado |
US9523291B2 (en) | 2015-03-18 | 2016-12-20 | Caterpillar Inc. | Valve actuation system having rocker-located hydraulic reservoir |
CN106089348B (zh) * | 2016-08-23 | 2018-10-16 | 潍柴动力股份有限公司 | 一种气门桥及包括该气门桥的发动机 |
EP3498989A1 (de) * | 2017-12-14 | 2019-06-19 | Innio Jenbacher GmbH & Co OG | Ventiltrieb für einen verbrennungsmotor |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4133332A (en) * | 1977-10-13 | 1979-01-09 | The Torrington Company | Valve control mechanism |
US4475497A (en) * | 1981-11-04 | 1984-10-09 | Honda Giken Kogyo Kabushiki Kaisha | Internal combustion engine having an intake/exhaust valve assembly and hydraulic means for rendering the valve assembly inoperative |
DE3438556A1 (de) * | 1984-10-20 | 1986-04-24 | Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen | Ventilsteuerung einer aufgeladenen viertakt-brennkraftmaschine |
JPS61164009A (ja) * | 1985-01-14 | 1986-07-24 | Toyota Motor Corp | 低騒音高出力化動弁系システム |
US4759321A (en) * | 1985-06-24 | 1988-07-26 | Nissan Motor Co., Ltd. | Valve timing arrangement for internal combustion engine having multiple inlet valves per cylinder |
DE59102641D1 (de) * | 1991-03-13 | 1994-09-29 | Bayerische Motoren Werke Ag | Anordnung eines Stössels zur Betätigung zumindest zweier Hubventile. |
EP0736672B1 (de) * | 1995-04-04 | 1998-04-08 | Steyr Nutzfahrzeuge Ag | Verfahren zur Motorbremsung mit einem 4-Takt-Verbrennungsmotor |
IT1285853B1 (it) * | 1996-04-24 | 1998-06-24 | Fiat Ricerche | Motore a combustione interna con valvole ad azionamento variabile. |
-
1998
- 1998-12-17 DE DE19858213A patent/DE19858213A1/de not_active Withdrawn
-
1999
- 1999-11-10 DE DE59905064T patent/DE59905064D1/de not_active Expired - Lifetime
- 1999-11-10 EP EP99122366A patent/EP1022444B1/de not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012155315A1 (zh) * | 2011-05-18 | 2012-11-22 | 上海尤顺汽车部件有限公司 | 一种重置式摇臂制动方法和装置 |
US8991350B2 (en) | 2011-05-18 | 2015-03-31 | Shanghai Universoon Auto Parts Co., Ltd. | Reset type rocker braking method and device |
Also Published As
Publication number | Publication date |
---|---|
DE59905064D1 (de) | 2003-05-22 |
EP1022444A3 (de) | 2001-01-31 |
EP1022444A2 (de) | 2000-07-26 |
DE19858213A1 (de) | 2000-06-21 |
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