EP2564038A2 - Hydraulisches ventilspiel-ausgleichselement für hubkolbenbrennkraftmaschinen - Google Patents
Hydraulisches ventilspiel-ausgleichselement für hubkolbenbrennkraftmaschinenInfo
- Publication number
- EP2564038A2 EP2564038A2 EP11715902A EP11715902A EP2564038A2 EP 2564038 A2 EP2564038 A2 EP 2564038A2 EP 11715902 A EP11715902 A EP 11715902A EP 11715902 A EP11715902 A EP 11715902A EP 2564038 A2 EP2564038 A2 EP 2564038A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- working piston
- cylinder
- internal combustion
- camshaft
- 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.)
- Granted
Links
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
- F01L1/20—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
- F01L1/245—Hydraulic tappets
-
- 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
-
- 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
- F01L1/2411—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the valve stem and rocker arm
-
- 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
-
- 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
- F01L2305/00—Valve arrangements comprising rollers
-
- 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
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/01—Absolute values
-
- 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
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/03—Auxiliary actuators
- F01L2820/032—Electric motors
Definitions
- Reciprocating internal combustion engine according to the four-stroke method with a crankcase and at least one cylinder arranged therein, in which a piston is guided by a crankshaft, with at least one cylinder head closing the cylinder whose inlet and outlet channels of at least one each with a valve spring loaded inlet and outlet valves are actuated, which are actuated by driven by a camshaft transmission elements, and with a hydraulic valve clearance compensation element which in at least one of the transmission elements or in a built-in schreibserte- element between the camshaft and at least one input and / or exhaust valve is installed and has a working piston, a cylinder housing cooperating with the working piston, a return spring installed therebetween and a non-return valve delimiting a high-pressure chamber, whose valve closing body corresponds to a valve seat on the working piston.
- stop valves or clamping devices on the hydraulic valve clearance compensating element, which are actuated externally and prevent both inflation and lowering of the hydraulic valve clearance compensation element.
- Such stop or clamping devices are structurally very expensive and expensive.
- the problems are particularly significant when brake control devices or exhaust gas recirculation devices are used on the reciprocating internal combustion engine to the hydraulic valve clearance compensation elements, wherein additional elevations are provided in the region of the base circle of the cam.
- the object of the invention is therefore to remedy the disadvantages of the described measures on hydraulic valve clearance compensation elements, in particular to the effect that both in normal operation, especially in larger engines for commercial vehicles, as well as in operation with additional opening of the gas exchange valves for decompression or Exhaust gas recirculation purposes no decrease in the hydraulic valve clearance compensation elements occurs. This should be presented with simple means. Summary of the invention
- valve closing body has a partial spherical surface in the region of the valve seat and that the ratio of the diameter of the working piston (8) to twice the radius of the partial spherical surface (13) ⁇ 2.
- valve seat or the valve closing body has a large opening in the region of the valve seat, without the overall dimensions of the valve closing body being disproportionately large. This results in a sufficient and rapid filling of the high-pressure chamber, whereby a drop in the hydraulic valve clearance compensation element is prevented, even if additional surveys on the cam shorten the filling time significantly.
- the valve closing body Following the partial spherical surface, the valve closing body has a cylindrical lateral surface which extends from the edge of the spherical surface.
- a lightweight valve closing body is provided, which has a much lower mass, in contrast to conventional designed as a ball valve closing bodies, although the valve seat diameter is large.
- valve closing body has a pin adjacent to the cylindrical jacket surface, wherein the pin is enclosed by a valve closing spring, which is further supported in an opening of a valve cap.
- a bore preferably a stepped bore, is provided, so that the high-pressure chamber can also fill along the valve closing spring, the pin and the stepped bore.
- a blind hole be provided in the region of the partial spherical surface at the end of the valve closing body facing away from the journal. Through the blind hole, the mass of the valve closing body is further reduced and increases the Olvorratsraum.
- the blind hole also serves as a collecting bag for contamination in the oil.
- the radius of the closing spherical surface is greater than or equal to 2.5 mm.
- the valve seat diameter is greater than or equal to 5.0 mm, wherein the diameter of the valve closing body is greater than or equal to 7.5 mm. This ensures that a complete filling of the high-pressure chamber takes place, even during intermediate surveys in the region of the base circle of the cams. This is due to the fact that the diameter of the working piston and the opening cross section of the check valve for the operation of the hydraulic valve clearance compensation element are of particular importance.
- the valve cap is advantageously designed with a stepped inner diameter, the large diameter enclosing the lateral surface of the valve closing body and the smaller diameter enclosing the valve closing spring.
- beads and openings are provided on the valve cap in the area of the large diameter, which extend from the high-pressure chamber to the valve seat in order to effect a sufficient and rapid filling of the high-pressure chamber.
- FIG. 1 shows a section through a rocker arm designed as a transmission element with a hydraulic valve clearance compensation element, which is connected via a roller to a cam of a camshaft and
- Figure 2 a section through the hydraulic valve clearance compensation element in an enlarged scale.
- 1 denotes a rocker arm, which is pivotally mounted on a rocker shaft 2.
- the rocker arm 1 is connected via a roller 3 with a cam 4 of a Hubkolbenbrennkraft- machine in operative connection.
- the cam is part of a camshaft, which is designed for a reciprocating internal combustion engine for commercial vehicle and / or car use.
- a hydraulic valve clearance compensation element is installed, which is supplied with oil from the reciprocating internal combustion engine and / or another oil supply unit via a channel.
- the hydraulic valve clearance compensation element 5 has a cylinder housing 7, which is displaceably guided in the rocker arm 1.
- a working piston 8 is installed, the outward movement is limited in the cylinder housing 7 by a spring ring.
- the working piston 8 is supported, as shown in Figure 1, on a mounted in the rocker arm 1 end plate 9 from.
- a valve seat 1 1 connects to which a valve closing body 12 is associated.
- the valve closing body 12 has a partial spherical surface 13, which merges into a cylindrical lateral surface 14. Following the cylindrical surface 14, a pin 15 is formed on the valve closing body 12, which is enclosed by a valve closing spring 16.
- valve closing spring 16 is further supported on a valve cap 17, which is firmly inserted in the working piston, for example, pressed, is. Between the valve cap 17 and the cylinder housing 7, a return spring 18 is installed, which acts on the working piston from the cylinder housing 7 away.
- the space around the return spring 18 is formed as a high pressure chamber 19, which is dominated by the valve closing body 12, which prevents compression of the high-pressure chamber.
- beads 20 and openings 21 are provided which ensure rapid filling of the high-pressure chamber 19 from the storage space 10.
- a blind hole 22 is incorporated, whereby the mass of the valve closing body is reduced, at the same time the storage space 10 is increased and a collecting pocket is formed, in which contaminations of the oil can be deposited.
- the ratio of the diameter of the working piston to the diameter of the valve closing body which is usually designed as a ball, is above 3.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010018208A DE102010018208A1 (de) | 2010-04-26 | 2010-04-26 | Hydraulisches Ventilspiel-Ausgleichselement für Hubkolbenbrennkraftmaschinen |
| PCT/EP2011/055753 WO2011134790A2 (de) | 2010-04-26 | 2011-04-13 | Hydraulisches ventilspiel-ausgleichselement für hubkolbenbrennkraftmaschinen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2564038A2 true EP2564038A2 (de) | 2013-03-06 |
| EP2564038B1 EP2564038B1 (de) | 2014-09-17 |
Family
ID=44544232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11715902.0A Active EP2564038B1 (de) | 2010-04-26 | 2011-04-13 | Hydraulisches ventilspiel-ausgleichselement für hubkolbenbrennkraftmaschinen |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20130000573A1 (de) |
| EP (1) | EP2564038B1 (de) |
| DE (1) | DE102010018208A1 (de) |
| WO (1) | WO2011134790A2 (de) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2503705A (en) * | 2012-07-05 | 2014-01-08 | Eaton Srl | Hydraulic Lash Adjuster and Lost Motion System |
| KR20180008556A (ko) | 2015-05-18 | 2018-01-24 | 이턴 에스알엘 | 어큐뮬레이터로서 작동하는 오일 배출 밸브를 갖는 로커 암 |
| DE102015211122A1 (de) | 2015-06-17 | 2016-12-22 | Schaeffler Technologies AG & Co. KG | Übertragungselement für Hubkolbenbrennkraftmaschinen |
| DE102015216291B3 (de) | 2015-08-26 | 2016-11-03 | Schaeffler Technologies AG & Co. KG | Hydraulisches Ausgleichselement eines Ventiltriebs |
| DE102015220628B3 (de) * | 2015-10-22 | 2016-10-27 | Schaeffler Technologies AG & Co. KG | Flach- oder Rollenstößel für eine Hubkolbenbrennkraftmaschine |
| CN105736086B (zh) * | 2016-02-02 | 2018-06-29 | 吉林大学 | 燃烧制动与减压制动结合的发动机制动方法及减压装置 |
| US11242774B2 (en) * | 2019-09-20 | 2022-02-08 | Caterpillar Inc. | Rocker assembly with a hydraulic lash adjuster |
| CN111720184B (zh) * | 2020-06-29 | 2024-07-02 | 杭州新坐标科技股份有限公司 | 大型发动机平面液力支撑件 |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE24633E (en) * | 1959-04-14 | Voorhies | ||
| US3124114A (en) * | 1964-03-10 | Voorhies | ||
| US1916191A (en) * | 1931-11-27 | 1933-07-04 | Gen Motors Corp | Zero lash valve lifter |
| US2339238A (en) * | 1942-03-09 | 1944-01-18 | Buckley Arthur Burton | Valve tappet |
| US2682864A (en) * | 1952-05-08 | 1954-07-06 | Voorhies Carl | Valve lifter |
| US3014472A (en) * | 1960-06-13 | 1961-12-26 | Bendix Corp | Hydraulic valve tappet |
| US3140698A (en) * | 1962-04-13 | 1964-07-14 | Voorhies Carl | Hydraulic tappet unit inverted |
| US4164917A (en) * | 1977-08-16 | 1979-08-21 | Cummins Engine Company, Inc. | Controllable valve tappet for use with dual ramp cam |
| US4407241A (en) * | 1980-12-31 | 1983-10-04 | Cummins Engine Company, Inc. | Expandable hydraulic tappet with a variable exit valve |
| US4462364A (en) * | 1981-09-17 | 1984-07-31 | Aisin Seiki Kabushiki Kaisha | Hydraulic lash adjuster |
| JPS5923011A (ja) * | 1982-07-30 | 1984-02-06 | Honda Motor Co Ltd | 動弁機構における油圧式弁頭間隙排除装置 |
| DE4102537A1 (de) * | 1991-01-29 | 1992-07-30 | Man Nutzfahrzeuge Ag | Auslass-ventilstoessel fuer eine brennkraftmaschine |
| US5088458A (en) * | 1991-02-01 | 1992-02-18 | Siemens Automotive L.P. | Lash adjusted for engine valve actuator assembly |
| DE19818893A1 (de) * | 1998-04-28 | 1999-11-04 | Mwp Mahle J Wizemann Pleuco Gm | Hydraulisches Ventilspielausgleichselement |
| US6460499B1 (en) * | 2001-01-16 | 2002-10-08 | Tecumseh Products Company | Hydraulic lifter assembly |
| DE102004018457A1 (de) * | 2004-04-16 | 2005-11-17 | Ina-Schaeffler Kg | Hydraulisches Ventilspielausgleichselement |
| DE102004053203A1 (de) * | 2004-11-04 | 2006-06-01 | Schaeffler Kg | Variabler Ventiltrieb einer Brennkraftmaschine |
| US20070272185A1 (en) * | 2006-05-24 | 2007-11-29 | Schaeffler Kg | Hydraulic lash adjuster for an internal combustion engine |
| DE102007014248A1 (de) | 2007-03-24 | 2008-09-25 | Schaeffler Kg | Hubkolbenbrennkraftmaschine mit Motorbremseinrichtung |
-
2010
- 2010-04-26 DE DE102010018208A patent/DE102010018208A1/de not_active Withdrawn
-
2011
- 2011-04-13 EP EP11715902.0A patent/EP2564038B1/de active Active
- 2011-04-13 WO PCT/EP2011/055753 patent/WO2011134790A2/de not_active Ceased
- 2011-04-13 US US13/583,953 patent/US20130000573A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2011134790A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20130000573A1 (en) | 2013-01-03 |
| EP2564038B1 (de) | 2014-09-17 |
| WO2011134790A2 (de) | 2011-11-03 |
| DE102010018208A1 (de) | 2011-10-27 |
| WO2011134790A3 (de) | 2012-03-15 |
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