DE1924114A1 - Camshaft for internal combustion engines - Google Patents

Camshaft for internal combustion engines

Info

Publication number
DE1924114A1
DE1924114A1 DE19691924114 DE1924114A DE1924114A1 DE 1924114 A1 DE1924114 A1 DE 1924114A1 DE 19691924114 DE19691924114 DE 19691924114 DE 1924114 A DE1924114 A DE 1924114A DE 1924114 A1 DE1924114 A1 DE 1924114A1
Authority
DE
Germany
Prior art keywords
camshaft
cam
camshaft according
variator
internal combustion
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.)
Pending
Application number
DE19691924114
Other languages
German (de)
Inventor
Walter Schulz Jun
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.)
SCHULZ JUN WALTER
Original Assignee
SCHULZ JUN WALTER
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 SCHULZ JUN WALTER filed Critical SCHULZ JUN WALTER
Priority to DE19691924114 priority Critical patent/DE1924114A1/en
Publication of DE1924114A1 publication Critical patent/DE1924114A1/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
    • F16H53/02—Single-track cams for single-revolution cycles; Camshafts with such cams
    • F16H53/04—Adjustable cams
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08—Shape of cams
    • 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
    • F01L13/0057—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 by splittable or deformable cams
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valve Device For Special Equipments (AREA)

Description

"Nockenwelle für Brennkraftmaschinen" Die bischer bekannten Nockenwelle in Fahrzeug - Otto - Öotoren sind starre Nockenwelle, deren Steuerziten in Verzuschereihen fUr den entsprechenden Charakter des Motor. (Hochleistungs- und Drosselmotor) festgelegt wurden. "Camshaft for internal combustion engines" The well-known camshaft In vehicle - Otto - Öotoren are rigid camshafts, their tax rates in a row for the corresponding character of the engine. (High-performance and throttle motor) became.

Diese starren Nockenwellen hatten den Nachteil, daß z.B. der Hochleistungsmotor im unteren Drehzahlbereich sehr drehmomentschwach ist und der Drosselmotor keine große spea0Literleistung hat, Da in Europa die Kfz-Steuer nach dem Hubraum entrichtet wird, gibt es bei unJ in Europa im Vergleich zu den USA fast nur Kfz-Motoren mit Hochleistungscharakter. Dadurch rückte auch der Bereich des günstigten Drehmoments immer in höhere Drehzahlbereiche.These rigid camshafts had the disadvantage that, for example, the high-performance engine is very low-torque in the lower speed range and the throttle motor is not Has large capacity, as in Europe the vehicle tax is paid according to the engine capacity unJ in Europe, compared to the USA, almost only has car engines High performance character. This also moved the area of favorable torque always in higher speed ranges.

Im schleichenden Stadverkehr wirkte sich dies oft negativ aus, denn man musste oft in einen reicher übersetzteren Gang herunterschalten, andernfalls begann der Motor zu rukkeln.In the creeping city traffic, this often had a negative effect, because one often had to shift down into a richer gear, otherwise the engine began to lurch.

Die vorstehende Erfindung soll hier Abhilfe schaffen. Als Grundlarge wird eine relativ "zahme" Nockenwelle herangezogen, die sich praktisch mit steigender Drehzahl kontinuierlich in eine "schärfere" Nockenwelle verwandelt.The above invention is intended to remedy this. As a basic large a relatively "tame" camshaft is used, which is practical continuously transformed into a "sharper" camshaft with increasing speed.

Mit der Nockenwelle mit variableren Steuerzeiten kann also sowohl in den unteren wie oberen Drehzahlbereichen eine gute Zylinderfüllung garantiert werden.With the camshaft with more variable timing, both A good cylinder charge is guaranteed in the lower and upper speed ranges will.

Dies bedeutet, daß unter allen Betriebszuständen er gutes Drehmoment vorhanden ist, oder die Leistung eines Motors angehoben werden kann, ohne daß dieser im unteren Drehzahlbereich gegenüber der füheren Ausführung unelastischer wäre.This means that under all operating conditions it has good torque is present, or the output of an engine can be increased without this would be more inelastic in the lower speed range compared to the previous version.

Ein weiterer Vorteil besteht auch wahrscheinlich in den reineren Abgasen bei der variablen Nockenwelle, was im Hinblich auf die Bestimmungen in den USA - die ja unter anderem auch bei uns zu erwarten sind - bedeutungsvoll sein dürfte, In der Zeichnung zeigt Abb. la einen Nocken b und den eingefahrenen Variator ag Abb. Ib einen Nocken b mit ausgefahrenem Variator ag Abb. 2 den Variator a, der in den Hohlraum des Nockens b eingelagert wird, Danach wird die Welle e durch d geschoben und mit dem Ausgleichsstück f der Abstand der Welle e zur Hohlwelle c ausgeglichen.Another benefit is likely to be the cleaner exhaust with the variable camshaft, which is related to the regulations in the USA - which are to be expected from us, among others - should be meaningful, In the drawing, Fig. La shows a cam b and the retracted variator ag Fig. Ib a cam b with the variator ag Fig. 2 the variator a, the is embedded in the cavity of the cam b, then the shaft e is through d pushed and with the compensation piece f the distance between the shaft e and the hollow shaft c balanced.

Abb. 3 ein Beispiel für die Steuerung des Variators mit einem Fliehkraftmechanismus h in dem Nockenwellenantriebsard g.Fig. 3 an example of the control of the variator with a centrifugal mechanism h in the camshaft drive type g.

Dio Feder i diant als Rückholfeder des Fliehkraftmechanismus beim Uebergang in niedrige Drehzahlen.Dio Feder i diant as a return spring of the centrifugal mechanism at Transition to low speeds.

Für vielzylindrige Motoren kann wahrscheinlich der Dämpfer k, der verhindern soll, daß der Steuermechanismus h zum Flattern kommt, gespart werden.For multi-cylinder engines, the damper k, the is intended to prevent the control mechanism h from fluttering, can be saved.

Die Ausfahrung der schematisch dargestellten variablen Nockenwelle ist an oben beschriebenen und in Abb. 1, 2 und 3 angegebenen Einzelheiten nicht gebunden. Vielmehr lassen sich die oben beschriebenen Wirkungen rait ähnlich wirkenden Teilen und deren zinngemässen Anordnungen ebenfalls erzielen.The extension of the variable camshaft shown schematically is not in the details described above and given in Figs. 1, 2 and 3 bound. Rather, the effects described above can have a similar effect Parts and their tin-compliant arrangements also achieve.

Die variable Nockenwelle gemäss der vorstehenden Anmeldung bedeutet fUr die Kraftfahrer fraglos eine Vereinfachung in der Bedienung ihres Kraftfahrzeuges und vermittelt ihnen du Gefühl, ein problenloseres Fahrzeug zu lenken.The variable camshaft according to the above application means For drivers, there is no question that it is a simplification in the operation of their motor vehicle and gives them the feeling of driving a more problem-free vehicle.

Die erfindungsgemässe variable Nockenwelle sorgt für eine gute Zylinderfüllun-g in allen Drehzahlbereichen der Brennkraftmaschine. Dies geschieht aufgrund einer Vergrösserung der öffnungsdauer der Ventile mit Hilfe des erfindungsgemäss ausgebildeten Variatlonsnockens. Durch Verstellung dieses Variationsnockens, die vorzugsweise automatisch, beispielsweise mit dem beschriebenen Fliehkraftregler erfolgen kann, erfolgt eine Ausschwenkung des Variators a, derart, daß der Öffnungswinkel # - vgl. Abb. 1a und 1b - vergrössert wird.The variable camshaft according to the invention ensures good cylinder filling in all speed ranges of the internal combustion engine. This happens because of a Increasing the opening time of the valves with the aid of the one designed according to the invention Variation cam. By adjusting this variation cam, which is preferably can be done automatically, for example with the centrifugal governor described, the variator a swings out in such a way that the opening angle # - cf. Fig. 1a and 1b - is enlarged.

Claims (1)

A n s p r ü c h e Expectations 1. Nockenwelle für Brennkraftmaschinen, dadurch gekennezichnet, daß zur Verbesserung der Zylinderfüllung in allen Drehzahlbereichen der Brennkraftmaschine der Nocken mit einem die Steigung der Nockenkurve verändernden Verstellorgan versehen ist.1. Camshaft for internal combustion engines, characterized in that to improve the cylinder filling in all speed ranges of the internal combustion engine the cam is provided with an adjusting member that changes the slope of the cam curve is. 2. Nockenwelle nach Anspruch 1, dadurch gekennzeichnet, daß in einer Ausnehmung des Nockens (b) der verstellbare Nockenteil (Variator) (a) vorgesehen ist.2. Camshaft according to claim 1, characterized in that in one Recess of the cam (b) of the adjustable cam part (variator) (a) is provided is. 3. Nockenwelle nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Variator (a) symmetrisch in einer Ausnehmung des Nockens (b) angeordnet ist und nach wenigstens einer Seite ausschwenkbar ist.3. Camshaft according to claim 1 or 2, characterized in that the variator (a) is arranged symmetrically in a recess in the cam (b) and can be swung out to at least one side. 4. Nockenwelle nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Variator (a) auf seiner Aussenseite (a1) der Nockenkurve (b1) entspricht.4. Camshaft according to one of the preceding claims, characterized in that that the variator (a) corresponds on its outside (a1) to the cam curve (b1). 5. Nockenwelle nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Variator (a) auf seiner Fläche (a2) in der Ausgangslage gegen eine entsprechende Fläche innerhalb des Nockens (b) anliegt.5. Camshaft according to one of the preceding claims, characterized in that that the variator (a) on its surface (a2) in the starting position against a corresponding Surface within the cam (b). 6. Nockenwelle nach einem dor vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Varitcr (a) formschlüssig, z.B. mittels achsparalleler Rippen auf der entsprechend gerippten Welle (e) angeordnet ist.6. Camshaft according to one of the preceding claims, characterized in that that the Varitcr (a) form-fit, e.g. by means of axially parallel ribs on the corresponding ribbed shaft (s) is arranged. 7. Nockenwelle nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß ein Ausgleichsstück (f) zwecks Ausgleich des Abstandes der Welle (e) zur Hohlwelle (c) vorgesehen ist, 80 Nockenwelle nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zur Steuerung des Variators (a) ein Fliehkraftmechanismus (h) vorgesehen ist, der vorzugsweise im Nockenwellenantriebsrad (g) angeordnet ist.7. Camshaft according to one of the preceding claims, characterized in that that a compensating piece (f) to compensate for the distance between the shaft (e) and the hollow shaft (c) is provided 80 camshaft according to one of the preceding claims, characterized characterized in that a centrifugal mechanism (h) is used to control the variator (a) is provided, which is preferably arranged in the camshaft drive wheel (g). 9. Nockenwelle nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine Feder (i) als Rückholfeder im Flieht kraftmechanismus vorgesehen ist.9. Camshaft according to one of the preceding claims, characterized in that that a spring (i) is provided as a return spring in the fleeing force mechanism. lOo Nockenwelle nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zur Vermeidung von Platterschwingungen des Steuermechanismus ein Dämpfer (k) vorgesehen ist.lOo camshaft according to one of the preceding claims, characterized in that that to avoid plate vibrations of the control mechanism a damper (k) is provided. L e e r s e i t eL e r s e i t e
DE19691924114 1969-05-12 1969-05-12 Camshaft for internal combustion engines Pending DE1924114A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19691924114 DE1924114A1 (en) 1969-05-12 1969-05-12 Camshaft for internal combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691924114 DE1924114A1 (en) 1969-05-12 1969-05-12 Camshaft for internal combustion engines

Publications (1)

Publication Number Publication Date
DE1924114A1 true DE1924114A1 (en) 1970-11-19

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Application Number Title Priority Date Filing Date
DE19691924114 Pending DE1924114A1 (en) 1969-05-12 1969-05-12 Camshaft for internal combustion engines

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2930266A1 (en) * 1979-07-26 1981-02-12 Volkswagenwerk Ag CAMSHAFT ARRANGEMENT, IN PARTICULAR FOR AN INTERNAL COMBUSTION ENGINE
DE2942326A1 (en) * 1979-10-19 1981-04-23 Volkswagenwerk Ag, 3180 Wolfsburg Operating method for turbocharged engines - has dwell of valves timed to give better torque characteristic
DE3212663A1 (en) * 1982-04-05 1983-10-13 Harry 6200 Wiesbaden Martin Camshaft with variable timings
EP0234853A1 (en) * 1986-02-19 1987-09-02 Clemson University Apparatus for variable valve timing for an internal combustion engine.
US4770060A (en) * 1986-02-19 1988-09-13 Clemson University Apparatus and method for variable valve timing
US5136887A (en) * 1990-05-29 1992-08-11 Clemson University Variable valve actuating apparatus
US5161429A (en) * 1990-05-29 1992-11-10 Clemson University Variable valve actuating apparatus
US5253546A (en) * 1990-05-29 1993-10-19 Clemson University Variable valve actuating apparatus
DE4215057A1 (en) * 1992-05-07 1993-11-11 Audi Ag Camshaft for variable control of gas exchange valve in IC engine - has at least two parts with at least one cam divided along rotary axis and having run-in and run-out ramps
US5417186A (en) * 1993-06-28 1995-05-23 Clemson University Dual-acting apparatus for variable valve timing and the like
EP1337743A1 (en) * 2000-10-23 2003-08-27 Transtar Pacific Limited Variable duration valve timing camshaft

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2930266A1 (en) * 1979-07-26 1981-02-12 Volkswagenwerk Ag CAMSHAFT ARRANGEMENT, IN PARTICULAR FOR AN INTERNAL COMBUSTION ENGINE
DE2942326A1 (en) * 1979-10-19 1981-04-23 Volkswagenwerk Ag, 3180 Wolfsburg Operating method for turbocharged engines - has dwell of valves timed to give better torque characteristic
DE3212663A1 (en) * 1982-04-05 1983-10-13 Harry 6200 Wiesbaden Martin Camshaft with variable timings
EP0234853A1 (en) * 1986-02-19 1987-09-02 Clemson University Apparatus for variable valve timing for an internal combustion engine.
US4770060A (en) * 1986-02-19 1988-09-13 Clemson University Apparatus and method for variable valve timing
US4771742A (en) * 1986-02-19 1988-09-20 Clemson University Method for continuous camlobe phasing
US4917058A (en) * 1986-02-19 1990-04-17 Clemson University Method of reducing pumping losses and improving brake specific fuel consumption for an internal combustion engine
EP0440314A2 (en) * 1986-02-19 1991-08-07 Clemson University Method for variable valve timing for an internal combustion engine
EP0440314A3 (en) * 1986-02-19 1992-02-26 Clemson University Method for variable valve timing for an internal combustion engine
US5136887A (en) * 1990-05-29 1992-08-11 Clemson University Variable valve actuating apparatus
US5161429A (en) * 1990-05-29 1992-11-10 Clemson University Variable valve actuating apparatus
US5253546A (en) * 1990-05-29 1993-10-19 Clemson University Variable valve actuating apparatus
DE4215057A1 (en) * 1992-05-07 1993-11-11 Audi Ag Camshaft for variable control of gas exchange valve in IC engine - has at least two parts with at least one cam divided along rotary axis and having run-in and run-out ramps
US5417186A (en) * 1993-06-28 1995-05-23 Clemson University Dual-acting apparatus for variable valve timing and the like
EP1337743A1 (en) * 2000-10-23 2003-08-27 Transtar Pacific Limited Variable duration valve timing camshaft
EP1337743A4 (en) * 2000-10-23 2005-02-09 Transtar Pacific Ltd Variable duration valve timing camshaft
US7007652B2 (en) 2000-10-23 2006-03-07 Transtar Pacific Limited Variable duration valve timing camshaft

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