DE3938802A1 - Worm drive for rotary valve - is used in IC engine and has tooth path incorporating straight and inclined sections - Google Patents

Worm drive for rotary valve - is used in IC engine and has tooth path incorporating straight and inclined sections

Info

Publication number
DE3938802A1
DE3938802A1 DE3938802A DE3938802A DE3938802A1 DE 3938802 A1 DE3938802 A1 DE 3938802A1 DE 3938802 A DE3938802 A DE 3938802A DE 3938802 A DE3938802 A DE 3938802A DE 3938802 A1 DE3938802 A1 DE 3938802A1
Authority
DE
Germany
Prior art keywords
worm drive
valve
engine
drive according
rotary valve
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.)
Ceased
Application number
DE3938802A
Other languages
German (de)
Inventor
Wilhelm Graffenberger
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE3938802A priority Critical patent/DE3938802A1/en
Publication of DE3938802A1 publication Critical patent/DE3938802A1/en
Ceased legal-status Critical Current

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
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F01L7/06—Rotary or oscillatory slide valve-gear or valve arrangements with disc type valves
    • 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
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • 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
    • F01L2313/00—Rotary valve drives
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gear Transmission (AREA)
  • Mechanically-Actuated Valves (AREA)

Abstract

The worm drive (1) is for rotary valve control in an Otto cycle IC engine. It is designed so that each tooth path along a circumferential section length is two thirds straight and one third offset at certain points. USE/ADVANTAGE - System for opening and closing valves in IC engine unloads the valve sealing surfaces during part of the rotational movements.

Description

Schneckentrieb zur Ventilsteuerung für Ottomotoren.Worm drive for valve control for Petrol engines.

Die Schneckenwelle wird wie eine Nockenwelle von der Kurbelwelle im Verhältnis 2 : 1 angetrieben. Von der Schneckenwelle wird das fest mit dem Ventilschaft verbundene Ventilrad bewegt. Die Zahngänge (Schneckenzähne) können auch auf mehrere Wellen aufgeteilt sein, die rund um das Ventilrad gelagert sich gegenseitig antreiben.The worm shaft becomes like a camshaft driven by the crankshaft in a ratio of 2: 1. From the worm shaft it becomes solid with the Valve shaft connected to the valve wheel moves. The tooth gears (snail teeth) can also be divided into several waves that mutually supported around the valve wheel drive.

Eine Schneckenwelle, die mit Drehzahl der Kurbelwelle dreht, kann das Drehen des Ventils zum Schließen der Einlaß- und zum Öffnen der Auslaßöffnungen übernehmen, da bei jeder unteren Totpunkt­ stellung des Kolbens die Einlaßöffnungen geschlossen oder die Auslaßöffnungen ge­ öffnet werden müssen.A worm shaft with Speed of the crankshaft turns, turning the valve to close the Inlet and to open the outlet openings take over because at every bottom dead center position of the piston the inlet openings closed or the outlet openings ge must be opened.

Folgende Offenlegungsschriften beschreiben den Stand der Technik
23 35 623 (F 01 L7-06)
DE 37 10 824 A1 (F 01 L7/06)
DE 32 03 048 (F 01 L 7/08)
26 01 071 (F 01 L7/04).The following disclosures describe the state of the art
23 35 623 (F 01 L7-06)
DE 37 10 824 A1 (F 01 L7 / 06)
DE 32 03 048 (F 01 L 7/08)
26 01 071 (F 01 L7 / 04).

Der Konstruktion liegt die Aufgabe zu Grunde, drehende Ventile für Ottomotoren wirtschaftlich zu machen.The construction is based on the task rotating valves for petrol engines economically close.

Die Zeichnung zeigt den Ventilwechsel im oberen Totpunkt.The drawing shows the valve change in top dead center.

Fig. 1 zeigt die Schneckenwelle im Teilkreis geschnitten, aufgerollt als Fläche und einen Zahn des Ventil­ rades einmal im schrägen und einem im geraden Teil des Zahnganges. Links sind die oberen und unteren Kolbentotpunkte markiert. Rechts die schrägen Stücke der Zahngänge. Fig. 1 shows the worm shaft cut in a pitch circle, rolled up as a surface and a tooth of the valve wheel once in the oblique and one in the straight part of the gear. The upper and lower piston dead centers are marked on the left. On the right, the oblique pieces of the tooth gears.

Fig. 2 zeigt den Zylinderkopf, eine Schneckenwelle und das Ventilrad von oben. Unten um 180 Grad gedreht zwei Schneckenwellen, das Ventilrad und den Ventilschaft von vorne. Die Ventil­ führung, das Gleitlager und die Ventilfeder mit Kugellager im Schnitt. Fig. 2 shows the cylinder head, a worm shaft and the valve wheel from above. Two worm shafts rotated below 180 degrees, the valve wheel and the valve stem from the front. The valve guide, the plain bearing and the valve spring with ball bearing on average.

MaßeDimensions

Zylinderkopf-Lochkreis = 360 mm 1 mm = 1 Grad
Teilung 5 × 48 und 5 × 24
Ventil-Lochkreis = 360 mm 1 mm = 1 Grad
Teilung 5 × 72
Ventilrad-Teilkreis = 120 mm 1 mm = 3 Grad
Teilung 24
Zähnezahl 5
Schneckenwelle-Teilkreis = 360 mm 1 mm = 1 Grad
3 Schrägen a 40 mm lang
Versetzung je Schräge (Steigung) = 8 mm.Cylinder head bolt circle = 360 mm 1 mm = 1 degree
Division 5 × 48 and 5 × 24
Valve bolt circle = 360 mm 1 mm = 1 degree
Division 5 × 72
Valve wheel pitch circle = 120 mm 1 mm = 3 degrees
Division 24
Number of teeth 5
Worm shaft pitch circle = 360 mm 1 mm = 1 degree
3 bevels, each 40 mm long
Offset per slope (slope) = 8 mm.

Diese Maße sind nur zur besseren Darstellung der Zeichnung gewählt, andere Maße und Teilungen sind möglich.These dimensions are only for better illustration selected the drawing, other dimensions and divisions are possible.

Claims (5)

1. Schneckentrieb zur Ventilsteuerung für Ottomotoren, dadurch gekennzeichnet, daß jeder Zahngang auf einer Teilkreislänge ²/₃ gerade und ¹/₃ an bestimmten Stellen schräglaufend ist (Steigung).1. worm drive for valve control for gasoline engines, characterized in that each toothed gear on a pitch circle length ² / ₃ straight and ¹ / ₃ is inclined at certain points (slope). 2. Schneckentrieb nach Anspruch 1, dadurch gekennzeichnet, daß bei drehenden Ventilen die Dichtflächen während der Drehbewegungen entlastet sind.2. worm drive according to claim 1, characterized in that with rotating valves the sealing surfaces are relieved during the rotary movements are. 3. Schneckentrieb nach Anspruch 1, dadurch gekennzeichnet, daß ein Gleitlager nach ca. 0,01 bis 0,02 mm die längachsige Kraft die vom Ventilrad auf das Ventil als Hubkraft wirkt, begrenzt.3. worm drive according to claim 1, characterized in that a plain bearing after approx. 0.01 to 0.02 mm the longitudinal axis force from Valve wheel on the valve acts as a lifting force, limited. 4. Schneckentrieb nach Anspruch 1, dadurch gekennzeichnet, daß beim Ventillochwechsel im oberen Totpunkt eine Ventilbewegung eingespart wird.4. worm drive according to claim 1, characterized in that when changing the valve hole Valve movement saved at top dead center becomes. 5. Schneckentrieb nach Anspruch 1, dadurch gekennzeichnet, daß eine Schneckenwelle (Nocken­ welle) die mit der Drehzahl der Kurbelwelle dreht, die Ventilbewegungen in der unteren Totpunktstellung des Kolbens steuert.5. worm drive according to claim 1, characterized in that a worm shaft (cam shaft) which rotates at the speed of the crankshaft, the valve movements in the bottom dead center position controls the piston.
DE3938802A 1989-11-23 1989-11-23 Worm drive for rotary valve - is used in IC engine and has tooth path incorporating straight and inclined sections Ceased DE3938802A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE3938802A DE3938802A1 (en) 1989-11-23 1989-11-23 Worm drive for rotary valve - is used in IC engine and has tooth path incorporating straight and inclined sections

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3938802A DE3938802A1 (en) 1989-11-23 1989-11-23 Worm drive for rotary valve - is used in IC engine and has tooth path incorporating straight and inclined sections

Publications (1)

Publication Number Publication Date
DE3938802A1 true DE3938802A1 (en) 1991-05-29

Family

ID=6394043

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3938802A Ceased DE3938802A1 (en) 1989-11-23 1989-11-23 Worm drive for rotary valve - is used in IC engine and has tooth path incorporating straight and inclined sections

Country Status (1)

Country Link
DE (1) DE3938802A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9559C (en) * W. SlLLER in Berlin Innovations in rotary valve controls
WO1987004489A1 (en) * 1986-01-23 1987-07-30 Bishop Arthur E Rotary valve for internal combustion engines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9559C (en) * W. SlLLER in Berlin Innovations in rotary valve controls
WO1987004489A1 (en) * 1986-01-23 1987-07-30 Bishop Arthur E Rotary valve for internal combustion engines

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8131 Rejection