EP2201223A1 - Brennkraftmaschine mit zumindest einem zylinder mit einer drehsteifen nockenwelle - Google Patents
Brennkraftmaschine mit zumindest einem zylinder mit einer drehsteifen nockenwelleInfo
- Publication number
- EP2201223A1 EP2201223A1 EP08804579A EP08804579A EP2201223A1 EP 2201223 A1 EP2201223 A1 EP 2201223A1 EP 08804579 A EP08804579 A EP 08804579A EP 08804579 A EP08804579 A EP 08804579A EP 2201223 A1 EP2201223 A1 EP 2201223A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- camshaft
- combustion engine
- internal combustion
- gas exchange
- injection pump
- 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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/102—Mechanical drive, e.g. tappets or cams
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
Definitions
- the invention relates to an internal combustion engine having at least one cylinder with a torsionally rigid camshaft for actuating at least one gas exchange valve via a push rod and a valve lever, wherein a gas exchange cam of the camshaft acts via an adjustable transmission lever on the push rod.
- valve drive for gas exchange valves of an internal combustion engine with an adjustable oscillating lever, which cooperates on the one hand with an eccentric shaft and on the other hand with a roller running on a cam of a camshaft.
- the valve drive has at least one rocker arm, wherein the rocker arm acts with a first end on a gas exchange valve and is pivotally connected to a second end, each with a push rod.
- the adjustable rocker arm is articulated to the eccentric shaft, that is adjusted by the eccentric adjustable by an eccentric eccentric having a comparatively large Exzentereconomic, a desired and predeterminable as a design parameter phase shift with a maximum Phasenverstellwinkel and a predetermined maximum valve lift and the base of the push rod on the adjustable rocker arm during the phase shift approximately follows the pivot radius of the push rod around the upper pivot point on the linkage on the rocker arm.
- the object of the invention is to avoid these disadvantages and to adjust in the simplest possible way both the timing of the gas exchange valves and the injection timing. According to the invention this is achieved in that the camshaft via an injection cam drives a mechanical fuel injection pump and that the control time of the fuel injection pump is variable by means of acting on the camshaft phaser, wherein preferably the timing of the gas exchange valves and the fuel injection pump are independently adjustable.
- a structurally particularly simple adjustment of the timing of the gas exchange valves can be achieved if the axis of rotation of the transmission lever is adjustable by means of an eccentric shaft. It is provided in a simple embodiment that the timing of the intake and exhaust valves can be adjusted by a single eccentric shaft. In order to allow a separate adjustment of the timing for intake and exhaust valves, provides a constructive development of the invention, that in each case a separate eccentric shaft is provided for intake valves and exhaust valves.
- the gas exchange valves and the fuel injection pump can be driven by a single camshaft.
- a purely mechanical fuel injection pump is used, which keeps the cost very small. Due to the rotation of the camshaft via the phaser a large adjustment range for the fuel injection pump can be achieved.
- the adjustment range of the camshaft can be, for example, +/- 15 ° camshaft angle.
- FIGS. show schematically:
- FIG. 1 shows a valve actuating device of an internal combustion engine according to the invention in a cross section.
- FIG. 3 shows the camshaft in a section along the line III-III in Fig. 2.
- FIG. 4 shows the camshaft in a section along the line IV-IV in Fig. 2.
- FIG. 5 shows the valve lift over the camshaft angle
- FIG. 6 plotted the Einspritzpumpenhub over the camshaft angle.
- Fig. 1 shows two gas exchange valves 1, 2 of an internal combustion engine, which are driven by a lower camshaft 6 via a rocker arm 3a, a push rod 4a and a transmission lever 5a. Trained as a drag lever transmission lever 5a is mounted on a rotatable eccentric shaft 7. By rotating the eccentric shaft 7 with the eccentricity a, the transmission lever 5a is pushed back and forth, whereby the rotation axis 5 'of the transmission lever 5a shifts. As a result, the position change of the transmission lever 5a achieves a phase shift for the gas exchange valves 1, 2 of the valve lifting curve h within the adjustment range shown in FIG. For this purpose, FIG.
- h 2 denotes the basic position of the valve lift h.
- the lift curve is in the embodiment in the range of -15 ° to + 15 ° camshaft angle ⁇ adjustable.
- the corresponding extreme positions of the lifting curves are designated hi and h 3 .
- the gas exchange cams 8a, 8b act on the transmission levers 5a, 5b via rollers 9a, 9b.
- an injection cam 10 is further arranged for actuating a mechanical fuel injection pump 11, as shown in FIG. 2.
- a phaser 12 is arranged at one end of the camshaft, via which the control time of the fuel injection pump 11 within a cam angle range ⁇ from -15 ° to + 15 ° camshaft angle ⁇ is adjustable, as shown in FIG 6 appears.
- the injection pump stroke H is plotted against the camshaft angle ⁇ .
- H 2 designates the basic position of the injection pump stroke H, by which the control time of the fuel injection pump 11 can be adjusted within the range of the camshaft angle from -15 ° to + 15 °.
- the outermost portions of the Einspritzpumpenhubes H are designated in Fig. 6 with Hi and H 3 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0162507A AT503893B1 (de) | 2007-10-11 | 2007-10-11 | Brennkraftmaschine mit zumindest einem zylinder mit einer drehsteifen nockenwelle |
PCT/EP2008/062655 WO2009049996A1 (de) | 2007-10-11 | 2008-09-23 | Brennkraftmaschine mit zumindest einem zylinder mit einer drehsteifen nockenwelle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2201223A1 true EP2201223A1 (de) | 2010-06-30 |
EP2201223B1 EP2201223B1 (de) | 2011-04-27 |
Family
ID=38871151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08804579A Not-in-force EP2201223B1 (de) | 2007-10-11 | 2008-09-23 | Brennkraftmaschine mit zumindest einem zylinder mit einer drehsteifen nockenwelle |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2201223B1 (de) |
AT (2) | AT503893B1 (de) |
DE (1) | DE502008003375D1 (de) |
WO (1) | WO2009049996A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010011419A1 (de) * | 2010-03-15 | 2011-09-15 | Schaeffler Technologies Gmbh & Co. Kg | Antriebseinheit |
JP6908190B2 (ja) * | 2017-11-03 | 2021-07-21 | インディアン・モーターサイクル・インターナショナル・エルエルシー | エンジン用の可変バルブタイミングシステム |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS601354A (ja) * | 1983-06-18 | 1985-01-07 | Ikegai Corp | デイ−ゼル機関の燃焼制御装置 |
JPS6158908A (ja) | 1984-08-31 | 1986-03-26 | Hino Motors Ltd | 内燃機関の可変タイミング動弁装置 |
JPS61250377A (ja) * | 1985-04-26 | 1986-11-07 | Kubota Ltd | 燃料噴射機関のユニツトインゼクタのプランジヤ駆動装置 |
US5713335A (en) * | 1995-09-12 | 1998-02-03 | Cummins Engine Company, Inc. | Variable injection timing and injection pressure control arrangement |
JP3619402B2 (ja) * | 1999-09-10 | 2005-02-09 | ダイハツ工業株式会社 | 2サイクルユニフロー型ディーゼル内燃機関の可変バルブタイミング装置 |
DE10041466B4 (de) * | 2000-08-23 | 2008-10-09 | Man Diesel Se | Ventiltrieb für Gaswechselventile einer Brennkraftmaschine |
JP2003035179A (ja) * | 2001-07-25 | 2003-02-07 | Sanshin Ind Co Ltd | 船外機用4サイクルエンジン |
DE102004057438A1 (de) | 2004-11-27 | 2006-06-01 | Man B & W Diesel Ag | Ventiltrieb für Gaswechselventile einer Brennkraftmaschine mit einem verstellbaren Schwinghebel, der einerseits mit einer Exzenterwelle und andererseits mit einer auf einem Nocken einer Nockenwelle laufenden Rolle zusammenwirkt |
-
2007
- 2007-10-11 AT AT0162507A patent/AT503893B1/de not_active IP Right Cessation
-
2008
- 2008-09-23 DE DE502008003375T patent/DE502008003375D1/de active Active
- 2008-09-23 WO PCT/EP2008/062655 patent/WO2009049996A1/de active Application Filing
- 2008-09-23 EP EP08804579A patent/EP2201223B1/de not_active Not-in-force
- 2008-09-23 AT AT08804579T patent/ATE507372T1/de active
Non-Patent Citations (1)
Title |
---|
See references of WO2009049996A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2009049996A1 (de) | 2009-04-23 |
EP2201223B1 (de) | 2011-04-27 |
DE502008003375D1 (de) | 2011-06-09 |
AT503893B1 (de) | 2011-04-15 |
AT503893A2 (de) | 2008-01-15 |
AT503893A3 (de) | 2010-12-15 |
ATE507372T1 (de) | 2011-05-15 |
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