EP1002945A2 - Stirnrad-Nockenwellenantrieb für eine Brennkraftmaschine - Google Patents
Stirnrad-Nockenwellenantrieb für eine Brennkraftmaschine Download PDFInfo
- Publication number
- EP1002945A2 EP1002945A2 EP99120961A EP99120961A EP1002945A2 EP 1002945 A2 EP1002945 A2 EP 1002945A2 EP 99120961 A EP99120961 A EP 99120961A EP 99120961 A EP99120961 A EP 99120961A EP 1002945 A2 EP1002945 A2 EP 1002945A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- gear
- camshaft
- rotation
- crankshaft
- idler gear
- 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
Images
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
- F01L1/02—Valve drive
-
- 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
- F01L1/026—Gear drive
Definitions
- the invention relates to a spur gear camshaft drive for an internal combustion engine a crankcase, a crankshaft gear and a camshaft gear, according to the Preamble of claim 1.
- a particularly large game between a camshaft gear and a last one, with the camshaft gear meshing gear of the camshaft drive also results with increasing number of gears between the crankshaft and camshaft, because Sum up tolerances and center distance inaccuracies accordingly.
- the above-mentioned vibrations are further amplified by counter to a direction of rotation Forces acting on this camshaft, for example when actuating a Fuel pump of a pump-nozzle element, wherein a cam of the camshaft one has to overcome great resistance.
- a camshaft drive spur gears for example, only come at a small distance between the crankshaft and Camshaft, i.e. with the camshaft below, for use. It is Reduction of the game already provided to provide helical gears, so that the run is as quiet as possible. Nevertheless, such spur gear or Gear camshaft drives have so far not provided comfort, smooth running and accuracy a camshaft drive with toothed belt wheels or chain wheels with roller chain.
- the present invention has for its object an improved spur gear camshaft drive of the type mentioned above, the the disadvantages mentioned above are overcome and its possible uses without undesirable side effects in a wide variety of motor vehicles, especially in Passenger cars to be expanded.
- crankshaft gear and Camshaft gear is arranged at least one differential idler gear, the axis of rotation is freely movable with respect to the crankcase.
- the axis of rotation of the differential idler gear is from at least two brackets pivotally supported, which are on the axis of rotation of the differential intermediate wheel opposite ends each on fixed axes of rotation from to Compensating intermediate gear pivotally support adjacent gears.
- a game compensation directly on the camshaft can be achieved in that the Balance idler gear between the camshaft gear and a last idler gear of the Spur gear camshaft drive is arranged. Since the entire game of the When the spur gear camshaft drive is added up, there is maximum backlash compensation.
- a gear ratio is expediently achieved from the crankshaft to Camshaft of 2: 1 in that a ratio of the number of teeth between the differential idler gear and an adjacent idler gear is selected accordingly.
- adjacent idler gear for example an idler gear on the crankshaft side.
- FIGS. 1 to 4 of an inventive Spur gear camshaft drive on a crankcase 10 otherwise not closer Internal combustion engine shown comprises a crankshaft gear 12, a first intermediate gear 14, a second idler gear 16, a differential idler gear 18, and a camshaft gear 20.
- the second idler gear 16 meshes with a drive gear 22 for one, not shown Water pump.
- the crankshaft gear 12 also meshes with a drive gear 24 for one Oil pump, not shown, and with a third intermediate gear 26.
- the third intermediate gear 26 in turn meshes with a fourth intermediate wheel 28, which in turn is a Drive gear 30 of a generator, not shown, and a drive gear 32 one drives not shown hydraulic pump meshing.
- the second idler gear 16 is with a another ring gear 34 rotatably connected, the second idler gear 16 itself with the first intermediate gear 14 and the further ring gear 34 with the compensating intermediate gear 18th combs.
- a number of teeth of the further ring gear 34 and a number of teeth of the differential idler gear 18 is chosen such that the crankshaft gear 12 to Camshaft gear 20 gives a ratio of 2: 1.
- An axis of rotation 36 of the differential idler gear 18 is with respect to the crankcase 10 and a cylinder head can be moved freely and only with respect to the axes of rotation 42, 44 from the second idler gear 16 and camshaft gear 20 through two pairs of brackets 38 and 40 predetermined.
- the bracket 38 hold the axis of rotation 36 of the differential idler gear on one side 18 rotatable, while an opposite side of the bracket 38 on the Axis of rotation 42 of the second idler gear 16 is supported.
- the bracket 40 also hold one Side the axis of rotation 36 of the differential idler gear 18 rotatable while one opposite side of the bracket 38 in the cylinder head housing via the axis of rotation 44 of the Camshaft gear 20 is supported.
- brackets 38 and 40 can change Distance between the axes of rotation 42 and 44 a varying angle to each other include so that the differential idler 18 always tight and essentially free of play meshes with both the ring gear 34 and the camshaft gear 20.
- the bracket 38 and 40 thus form a joint with the joint axis on the axis of rotation 36 of the differential idler gear 18, which changes according to changing distances between the Axes of rotation 42 and 44 spread more or less wide due to thermal expansion.
- a wobbling of the compensating intermediate wheel 18 is prevented by means of disc springs 46.
- FIG. 4 shows an area of the spur gear camshaft drive hidden in FIG. 1 in the area of the camshaft gear 20.
- the pair of brackets 40 is supported in the cylinder head housing on the Axis of rotation 44 of the camshaft gear 20, whereas the respective camshaft gear 20 opposite ends 49 of the bracket 40 the axis of rotation 36 of the not shown in Fig. 4 Hold the idler gear 18.
- the Bolted camshaft assembly which also i.a. a sender wheel 52 and a hub 54 includes.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Gears, Cams (AREA)
- Valve Device For Special Equipments (AREA)
- Gear Transmission (AREA)
Abstract
Description
- Fig. 1
- eine bevorzugte Ausführungsform eines erfindungsgemäßen Stirnrad-Nockenwellenantriebs in Aufsicht,
- Fig. 2
- eine Schnittansicht entlang Linie l-l von Fig. 1 und
- Fig. 3 und 4
- Explosionsdarstellungen.
Claims (4)
- Stirnrad-Nockenwellenantrieb für eine Brennkraftmaschine mit einem Kurbelgehäuse (10), einem Kurbelwellenrad (12) und einem Nockenwellenrad (20),
dadurch gekennzeichnet,
daß zwischen Kurbelwellenrad (10) und Nockenwellenrad (20) wenigstens ein Ausgleich-Zwischenrad (18) angeordnet ist, dessen Drehachse (36) bezüglich des Kurbelgehäuses (10) frei beweglich ist. - Stirnrad-Nockenwellenantrieb nach Anspruch 1,
dadurch gekennzeichnet,
daß die Drehachse (36) des Ausgleich-Zwischenrades (18) von wenigstens zwei Bügeln (38,40) schwenkbar gehaltert ist, welche sich an der Drehachse (36) des Ausgleich-Zwischenrades (18) gegenüberliegenden Enden jeweils an festen Drehachsen (42,44) von zum Ausgleich-Zwischenrad (18) benachbarten Zahnrädern (20,34) schwenkbar abstützen. - Stirnrad-Nockenwellenantrieb nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß das Ausgleich-Zwischenrad (18) zwischen dem Nockenwellenrad (20) und einem letzten Zwischenrad (16) des Stirnrad-Nockenwellenantriebes angeordnet ist. - Stirnrad-Nockenwellenantrieb nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß ein Verhältnis der Zähnezahl zwischen dem Ausgleich-Zwischenrad (18) und einem benachbarten Zwischenrad (34) derart gewählt ist, daß sich ein Übersetzungsverhältnis von Kurbelwelle zu Nockenwelle von 2:1 ergibt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853635A DE19853635A1 (de) | 1998-11-20 | 1998-11-20 | Stirnrad-Nockenwellenantrieb für eine Brennkraftmaschine |
DE19853635 | 1998-11-20 |
Publications (4)
Publication Number | Publication Date |
---|---|
EP1002945A2 true EP1002945A2 (de) | 2000-05-24 |
EP1002945A4 EP1002945A4 (de) | 2001-03-01 |
EP1002945A3 EP1002945A3 (de) | 2001-04-18 |
EP1002945B1 EP1002945B1 (de) | 2005-02-09 |
Family
ID=7888490
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99120961A Expired - Lifetime EP1002945B1 (de) | 1998-11-20 | 1999-11-03 | Stirnrad-Nockenwellenantrieb für eine Brennkraftmaschine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1002945B1 (de) |
AT (1) | ATE289006T1 (de) |
DE (2) | DE19853635A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004018263A1 (de) * | 2004-04-15 | 2005-11-24 | Bayerische Motoren Werke Ag | Einrichtung zur Flankenspieleinstellung, insbesondere für einen Zahnräder umfassenden Nockenwellenantrieb |
DE102009027509A1 (de) | 2009-07-07 | 2011-01-20 | Zf Friedrichshafen Ag | Anordnung von mindestens zwei Zahnradstufen in einem Getriebe |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1474672A (en) * | 1974-01-24 | 1977-05-25 | Tatra Np | Camshaft gear drive of an internal combustion engine |
GB2140079A (en) * | 1983-03-16 | 1984-11-21 | Porsche Ag | Camshaft drive of an internal combustion engine |
JPH02146209A (ja) * | 1988-11-28 | 1990-06-05 | Yamaha Motor Co Ltd | 4サイクルエンジンのカム軸駆動装置 |
JPH04153506A (ja) * | 1990-10-17 | 1992-05-27 | Mazda Motor Corp | エンジンのカムシャフト駆動装置 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1148478A (en) * | 1913-08-21 | 1915-07-27 | J B M Electric Company | Engine-gearing. |
-
1998
- 1998-11-20 DE DE19853635A patent/DE19853635A1/de not_active Withdrawn
-
1999
- 1999-11-03 DE DE59911589T patent/DE59911589D1/de not_active Expired - Lifetime
- 1999-11-03 EP EP99120961A patent/EP1002945B1/de not_active Expired - Lifetime
- 1999-11-03 AT AT99120961T patent/ATE289006T1/de not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1474672A (en) * | 1974-01-24 | 1977-05-25 | Tatra Np | Camshaft gear drive of an internal combustion engine |
GB2140079A (en) * | 1983-03-16 | 1984-11-21 | Porsche Ag | Camshaft drive of an internal combustion engine |
JPH02146209A (ja) * | 1988-11-28 | 1990-06-05 | Yamaha Motor Co Ltd | 4サイクルエンジンのカム軸駆動装置 |
JPH04153506A (ja) * | 1990-10-17 | 1992-05-27 | Mazda Motor Corp | エンジンのカムシャフト駆動装置 |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 014, no. 388 (M-1014), 22. August 1990 (1990-08-22) & JP 02 146209 A (YAMAHA MOTOR CO LTD), 5. Juni 1990 (1990-06-05) * |
PATENT ABSTRACTS OF JAPAN vol. 016, no. 440 (M-1310), 14. September 1992 (1992-09-14) & JP 04 153506 A (MAZDA MOTOR CORP), 27. Mai 1992 (1992-05-27) * |
Also Published As
Publication number | Publication date |
---|---|
EP1002945B1 (de) | 2005-02-09 |
DE59911589D1 (de) | 2005-03-17 |
EP1002945A3 (de) | 2001-04-18 |
DE19853635A1 (de) | 2000-05-25 |
ATE289006T1 (de) | 2005-02-15 |
EP1002945A4 (de) | 2001-03-01 |
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