DE2456752A1 - Inlet and exhaust valve timing regulator - has sliding helical gears to alter cam angle - Google Patents

Inlet and exhaust valve timing regulator - has sliding helical gears to alter cam angle

Info

Publication number
DE2456752A1
DE2456752A1 DE19742456752 DE2456752A DE2456752A1 DE 2456752 A1 DE2456752 A1 DE 2456752A1 DE 19742456752 DE19742456752 DE 19742456752 DE 2456752 A DE2456752 A DE 2456752A DE 2456752 A1 DE2456752 A1 DE 2456752A1
Authority
DE
Germany
Prior art keywords
helical gears
camshafts
exhaust valve
inlet
shaft
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Withdrawn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
DE19742456752
Other languages
German (de)
Inventor
Rolf Dipl Ing Eckert
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Priority to DE19742456752 priority Critical patent/DE2456752A1/en
Publication of DE2456752A1 publication Critical patent/DE2456752A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0203—Variable control of intake and exhaust valves
    • F02D13/0215—Variable control of intake and exhaust valves changing the valve timing only
    • 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
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L13/0047—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction the movement of the valves resulting from the sum of the simultaneous actions of at least two cams, the cams being independently variable in phase in respect of each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0261—Controlling the valve overlap
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

Two cam shafts (1, 2) turn at the same speed to act against a two armed rocker pivoted on a shaft (8) provided with a helical gear having sufficient width to engage with helical gears (11, 12) on the cam shafts. The rocker shaft (8) is turned in the usual manner and speed by the engine crankshaft and turns the cam shafts via the helical gears. The cam shaft gears can be moved axially by hydraulic means so that the cams rotate to bear on the two armed rocker at different angles according to the helical gears axial position. When the system is applied to both valves. The inlet valves and exhaust valve closing and opening times can be varied to suit engine working conditions.

Description

Ventilsteuerung für Hubkoibenbrennkraftmaschinen Die Erfindung betrifft eine Ventilsteuerung fUr Hubkolbenbrennkraftmaschinen mit willkürlich veränderbaren Ventilsteuerdaten, bei der zwei mit gleicher Winkelgeschwindigkeit drehende Nocken zweier Nockenwellen über ein gemeinsames Übertragungselement auf das 'Ventil einwirken und die beiden Nokkenwellen eine vom Betriebszustand der Brennkraftmaschine abhängige veränderbare Phasenverschiebung aufweisen. Valve control for reciprocating internal combustion engines The invention relates to a valve control for reciprocating internal combustion engines with arbitrarily changeable Valve control data in which two cams rotating at the same angular speed two camshafts act on the valve via a common transmission element and the two camshafts one dependent on the operating state of the internal combustion engine have changeable phase shift.

Eine derartige Ventilsteuerung ist durch die DT-AS 2 049 737 bekannt. Die Veränderung von Ventilsteuerzeiten während des B-etriebes in Abhängigkeit von der Drehzahl und Last ist aus verschiedenen Gründen vorteilhaft. Zunächst wird der Liefergrad durch engere Öffnungswinkel bei kleiner Drehzahl und durch weitere öffnungswinkel bei hoher Drehzahl erhöht, wodurch nicht nur der Drehmomentverlauf über der Drehzahl vorbessert wird, sondern vor allem der Bereich des optimalen Kraftstoffverbrauchs vergrößert wlrd. Bei einer Brennkraftmaschine mit Abgasturboaufladung bewirkt ein kleiner Öffnungswinkel bei kleiner Drehzahl einen Ladedruckgewinn, während andererseits bei hoher Drehzahl und großen Öffnungswinkeln ein Laderpumpen ohne Abblaseeinrichtung vermieden und die Abgastemperaturen in Grenzen gehalten werden. Schließlich werden durch die Anpassung der Steuerzeiten an die betrieblichen Erfordernisse gUnstige Abgaswerte erreicht.Such a valve control is known from DT-AS 2 049 737. The change in valve timing during operation as a function of speed and load is advantageous for several reasons. First of all, the Delivery rate through narrower opening angles at low speed and through further opening angles Increased at high speed, which means that not only the torque curve over the speed is improved, but above all the area of the optimal Fuel consumption enlarged wlrd. In an internal combustion engine with exhaust gas turbocharging, a small opening angle at low speed a boost pressure gain, while on the other hand at high speed and large opening angles, a loader pump without a blow-off device avoided and the exhaust gas temperatures are kept within limits. Eventually be favorable by adapting the timing to the operational requirements Exhaust gas values reached.

Bei der bekannten Ventil steuerung werden die Nockenwellen über Zahnriemen angetrieben und die Phasenverschiebung der beiden Nockenwellen wird durch änderung der Trumlängen mittels Spannrollen und hydraulischer Stelleneinrichtung bewirkt.In the known valve control, the camshafts are via toothed belts driven and the phase shift of the two camshafts is changed by changing the span length is effected by means of tension rollers and hydraulic adjusting equipment.

Der Erfindung liegt die Aufgabe zugrunde, eine Ventilsteuerung mit einer räumlich günstigeren und betriebssichereren Einrichtung fUr die Phasenverschiebung der beiden Nockenwellen zu schaffen. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Übertragungselement ein zweiarmiger nebel ist und auf den Nockenwellen schrägverzahnte, axial verschiebbare Ritzel drehfest angeordnet sind, die mit einem auf der Hebelwelle gelagerten Zahnrad kämmen.The invention is based on the object of having a valve control a spatially more favorable and operationally more reliable device for the phase shift of the two camshafts. This object is achieved according to the invention solved that the transmission element is a two-armed fog and on the camshafts helical, axially displaceable Pinion rotatably arranged that mesh with a gear mounted on the lever shaft.

Der Antrieb der Ventilsteuerung erfolgt entweder durch den Antrieb einer Nockenwelle in üblicher Weise oder durch ein weiteres Zahnrad, das mit dem auf der Hebelwelle gelagerten Zahnrad verbunden ist. Durch die erfindungsgemäße Gestaltung ist auf kleinstem Bauraum eine funktionssichere Verstelleinrichtung geschaffen worden.The valve control is driven either by the drive a camshaft in the usual way or by another gear that is connected to the gear mounted on the lever shaft is connected. By the invention Design, a functionally reliable adjustment device is created in the smallest of spaces been.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt.An exemplary embodiment of the invention is shown in the drawing.

Abb. 1 zeigt zwei Schaubilder mit schematischen Darstellungen der Ventilsteuerung in extremen Positionen.Fig. 1 shows two diagrams with schematic representations of the Valve control in extreme positions.

Abb. 2 zeigt einen schematischen Querschnitt durch eine erfindungsgemäße Ventilsteuerung.Fig. 2 shows a schematic cross section through an inventive Valve control.

Zwei Nockenwellen 1 und 2 laufen' mit gleicher Winkelgeschwindigkeit um und wirken mit ihren Nocken 3 und 4 auf einen winkelförmigen Hebel 5i mit zwei Armen 6 wi--d 7. Der Hebel 5 ist auf einer Welle' 8 gelagert auf der ebenfalls ein s,chrägwerzahates Zahnrad 9 gelagert ist. Dieses ist mit einem Stirnrad 10 verbunden, das in üblicher Weise von der nicht näher dargestellten Kurbelwelle angetrieben wird. Das Zahnrad 9, das eine ausreichende Breite aufweist, kämmt mit zwei schrägverzahnten Ritzeln 11 und 12, die auf den Nockenwellen 1 und 2 axial verschiebbar und drehfest angeordnet sind. Sie können durch Schaltgabeln, hydraulische Mittel oder in einer sonst üblichen Weise verschoben werden. Ferner sind sie in der einen entgegengesetzten Endlage so zueinander eingestellt, daß die beiden maximalen Erhebungen der Nocken 3 und 4 gleichzeitig auf den Winkelhebel 5 einwirken, so daß, wie das obere Schaubild in Abbildung 1 zeigt, der kleinste Öffnungswinkel erzielt wird. Entsprechend zeigt das untere Schaltbild in Abbildung 1 die andere extreme Endlage der Ritzel 11 und 12, bei der die Nocken 3 und 4 der Nockenwellen 1 und 2 so weit phasenverschoben auf den Hebel 5 einwirken, daß ein größter Öffnungswinkel erreicht wird. In den Schaubildern ist der Nockenhub über dem Drehwinkel aufgetragen, und zwar sowohl für ein Auslaßventil als auch für ein Einlaßventil. Dabei ist der Öffnungsbeginn des Auslaßventils mit 16 und das Schließende mit 17 bezeichnet. Die entsprechenden Zeiten für das Einlaßventil sind mit 18 und 19 beziffert. Man erkennt aus den Schaubildern, daß mit zunehmender Phasenverschiebung der zwei dem Einlaßventil und der zwei dem Auslaßventil' zugeordneten Nocken nicht nur der jeweilige Öffnungswinkel, sondern auch der Uberschneidungswinkel der geöffneten Ventile vergrößert wird.Two camshafts 1 and 2 run at the same angular speed around and act with their cams 3 and 4 on one angular Lever 5i with two arms 6 wi - d 7. The lever 5 is mounted on a shaft '8 which is also a s, chanted gear 9 is mounted. This is with one Spur gear 10 connected, in the usual way from the crankshaft, not shown is driven. The gear wheel 9, which has a sufficient width, meshes with it two helical pinions 11 and 12 on the camshafts 1 and 2 axially are arranged displaceable and rotationally fixed. You can through shift forks, hydraulic Funds or in any other usual way. They are also in the one opposite end position so set to each other that the two maximum Elevations of the cams 3 and 4 act simultaneously on the angle lever 5, so that, as the upper diagram in Figure 1 shows, the smallest opening angle is achieved will. Correspondingly, the lower circuit diagram in Figure 1 shows the other extreme End position of the pinion 11 and 12, in which the cams 3 and 4 of the camshafts 1 and 2 act so far out of phase on the lever 5 that a largest opening angle is achieved. In the diagrams, the cam lift is plotted against the angle of rotation, both for an exhaust valve and for a Inlet valve. The opening start of the exhaust valve is at 16 and the closing end at 17 designated. The corresponding times for the inlet valve are numbered 18 and 19. It can be seen from the graphs that with increasing phase shift of the two the intake valve and the two cams associated with the exhaust valve 'not only the respective opening angle, but also the intersection angle of the opened Valves is enlarged.

Durch den Arm 6 des Hebels 5 wird ein Ventil 13 betätigt, das über einen Federteller 14 durch eine Ventilfeder 15 vorgespannt ist. Das Ventil 13 ist beispielsweise für ein hwaaß-oder Einlaßventil dargestellt.By the arm 6 of the lever 5, a valve 13 is operated, which over a spring plate 14 is biased by a valve spring 15. The valve 13 is shown for example for a hwaaß or inlet valve.

Claims (1)

P a t e n t a n s p r u c h P a t e n t a n s p r u c h Ventilsteuerung für Hubkolbenbrennkraftmaschinen mit willkürlich veränderbaren Ventilsteuerdaten, bei der zwei mit gleicher Winkelgeschwindigkeit drehende Nocken zweier Nokkenwellen über ein gemeinsames Übertragungselement auf das Ventil einwirken und die beiden Nockenwellen eine vom Betriebszustand der Brennkraftmaschine abhängige veränderbare Phasenverschiebung aufweisen, dadurch gekennzeichnet, daß das Ubertragungselement ein zweiarmiger Hebel (5) ist und auf den Nockenwellen (1, 2) schrägverzahnte, axial verschiebbare Ritzel (11, 12) drehfest angeordnet sind, die mit einem auf der Hebelwelle (8) gelagerten Zahnrad (9) kämmen.Valve control for reciprocating internal combustion engines with arbitrarily changeable Valve control data in which two cams rotating at the same angular speed two camshafts act on the valve via a common transmission element and the two camshafts one dependent on the operating state of the internal combustion engine have variable phase shift, characterized in that the transmission element is a two-armed lever (5) and on the camshafts (1, 2) helical, axially displaceable pinions (11, 12) are rotatably arranged with a on the lever shaft (8) mounted gear (9) mesh.
DE19742456752 1974-11-30 1974-11-30 Inlet and exhaust valve timing regulator - has sliding helical gears to alter cam angle Withdrawn DE2456752A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19742456752 DE2456752A1 (en) 1974-11-30 1974-11-30 Inlet and exhaust valve timing regulator - has sliding helical gears to alter cam angle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742456752 DE2456752A1 (en) 1974-11-30 1974-11-30 Inlet and exhaust valve timing regulator - has sliding helical gears to alter cam angle

Publications (1)

Publication Number Publication Date
DE2456752A1 true DE2456752A1 (en) 1976-08-12

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2929195A1 (en) * 1979-07-19 1981-02-05 Franz Prof Dipl Ing Pischinger FILLING CONTROL WITH FLAT SLIDERS
DE3217203A1 (en) * 1981-05-15 1982-12-02 Honda Giken Kogyo K.K., Tokyo VARIABLE VALVE CONTROL
FR2516976A1 (en) * 1981-11-25 1983-05-27 Ford France DEVICE FOR MODIFYING THE OPERATION TIME OF THE VALVES OF AN INTERNAL COMBUSTION ENGINE AS A FUNCTION OF THE ROTATION LOAD AND SPEED
DE3436629A1 (en) * 1984-10-05 1986-04-10 Atlas Fahrzeugtechnik GmbH, 5980 Werdohl Camshaft timing mechanism
EP0269125A2 (en) * 1986-11-27 1988-06-01 Mazda Motor Corporation Supercharged engine
EP0352580A1 (en) * 1988-07-28 1990-01-31 Krupp MaK Maschinenbau GmbH Operating system of internal-combustion engine valves
EP0472430A2 (en) * 1990-08-23 1992-02-26 Ricardo Consulting Engineers Limited Valve gear for internal combustion engines
DE4036010A1 (en) * 1990-11-13 1992-05-14 Teves Gmbh Alfred Variable drive for camshafts of multicylinder engine - incorporates hydraulic pump driven by exhaust valve camshaft, to adjust bevel gearing to inlet valve camshaft
US5431132A (en) * 1993-01-20 1995-07-11 Meta Motoren-Und Energie-Technik Gmbh Variable valve gear of internal combustion engines
FR2742477A1 (en) * 1995-12-16 1997-06-20 Bosch Gmbh Robert DEVICE FOR ADJUSTING A CAMSHAFT OF AN INTERNAL COMBUSTION ENGINE
WO1999057422A1 (en) * 1998-05-04 1999-11-11 Paul Joseph Bentley Variable timing poppet valve apparatus
AU741608B2 (en) * 1998-05-04 2001-12-06 Paul Joseph Bentley Variable timing poppet valve apparatus
WO2002048510A3 (en) * 2000-12-15 2002-08-22 Melchior Jean F Variable timing device for reciprocating engines, engines comprising same and distribution and turbocharging method
DE10357083A1 (en) * 2003-12-06 2005-06-30 Ina-Schaeffler Kg Variable valve drive for external ignition combustion engine has lift function adjustment auxiliary cam on secondary camshaft rotating at primary camshaft revolution rate, actuating element pivot point guided on auxiliary cam
AT500600B1 (en) * 2004-07-20 2007-09-15 Avl List Gmbh Internal combustion engine, has gas exchange valves controlled by two cams provided on respective camshafts, which have adjustable phase position to modify control time of valves, and rocker levers supported on common axle actuate valves
US7685977B2 (en) 2004-06-24 2010-03-30 Avl List Gmbh Internal combustion engine
WO2023046753A1 (en) * 2021-09-21 2023-03-30 Audi Ag Method for operating an internal combustion engine, and corresponding internal combustion engine

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2929195A1 (en) * 1979-07-19 1981-02-05 Franz Prof Dipl Ing Pischinger FILLING CONTROL WITH FLAT SLIDERS
DE3217203A1 (en) * 1981-05-15 1982-12-02 Honda Giken Kogyo K.K., Tokyo VARIABLE VALVE CONTROL
FR2516976A1 (en) * 1981-11-25 1983-05-27 Ford France DEVICE FOR MODIFYING THE OPERATION TIME OF THE VALVES OF AN INTERNAL COMBUSTION ENGINE AS A FUNCTION OF THE ROTATION LOAD AND SPEED
DE3146613A1 (en) * 1981-11-25 1983-06-01 Ford-Werke AG, 5000 Köln DEVICE FOR CHANGING THE VALVE CONTROL TIMES OF INTERNAL COMBUSTION ENGINES WITH LOAD AND SPEED
DE3436629A1 (en) * 1984-10-05 1986-04-10 Atlas Fahrzeugtechnik GmbH, 5980 Werdohl Camshaft timing mechanism
EP0269125A2 (en) * 1986-11-27 1988-06-01 Mazda Motor Corporation Supercharged engine
EP0269125A3 (en) * 1986-11-27 1990-01-24 Mazda Motor Corporation Supercharged engine
EP0352580A1 (en) * 1988-07-28 1990-01-31 Krupp MaK Maschinenbau GmbH Operating system of internal-combustion engine valves
EP0472430A3 (en) * 1990-08-23 1992-05-27 Ricardo Consulting Engineers Limited Valve gear for internal combustion engines
EP0472430A2 (en) * 1990-08-23 1992-02-26 Ricardo Consulting Engineers Limited Valve gear for internal combustion engines
US5178105A (en) * 1990-08-23 1993-01-12 Ricardo Consulting Engineers Limited Valve gear for internal combustion engines
DE4036010A1 (en) * 1990-11-13 1992-05-14 Teves Gmbh Alfred Variable drive for camshafts of multicylinder engine - incorporates hydraulic pump driven by exhaust valve camshaft, to adjust bevel gearing to inlet valve camshaft
US5431132A (en) * 1993-01-20 1995-07-11 Meta Motoren-Und Energie-Technik Gmbh Variable valve gear of internal combustion engines
FR2742477A1 (en) * 1995-12-16 1997-06-20 Bosch Gmbh Robert DEVICE FOR ADJUSTING A CAMSHAFT OF AN INTERNAL COMBUSTION ENGINE
AU741608B2 (en) * 1998-05-04 2001-12-06 Paul Joseph Bentley Variable timing poppet valve apparatus
WO1999057422A1 (en) * 1998-05-04 1999-11-11 Paul Joseph Bentley Variable timing poppet valve apparatus
US6352060B1 (en) * 1998-05-04 2002-03-05 Paul Jospeh Bentley Variable timing poppet valve apparatus
WO2002048510A3 (en) * 2000-12-15 2002-08-22 Melchior Jean F Variable timing device for reciprocating engines, engines comprising same and distribution and turbocharging method
DE10357083A1 (en) * 2003-12-06 2005-06-30 Ina-Schaeffler Kg Variable valve drive for external ignition combustion engine has lift function adjustment auxiliary cam on secondary camshaft rotating at primary camshaft revolution rate, actuating element pivot point guided on auxiliary cam
US7685977B2 (en) 2004-06-24 2010-03-30 Avl List Gmbh Internal combustion engine
AT500600B1 (en) * 2004-07-20 2007-09-15 Avl List Gmbh Internal combustion engine, has gas exchange valves controlled by two cams provided on respective camshafts, which have adjustable phase position to modify control time of valves, and rocker levers supported on common axle actuate valves
WO2023046753A1 (en) * 2021-09-21 2023-03-30 Audi Ag Method for operating an internal combustion engine, and corresponding internal combustion engine

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8141 Disposal/no request for examination