Talk:Camshaft

From Wikipedia, the free encyclopedia
Jump to: navigation, search
WikiProject Technology (Rated C-class)
WikiProject icon This article is within the scope of WikiProject Technology, a collaborative effort to improve the coverage of technology on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
C-Class article C  This article has been rated as C-Class on the project's quality scale.
Checklist icon
 

I'm not sure why the changes by 213.236.117.2 were reverted; some good information was added. I've put the changes back in, with the exception of the removed two-stroke cycle comments. From what I can determine, some diesel two-stroke engines do use valves and a camshaft. [1] -- Wapcaplet 16:54, 28 Apr 2004 (UTC)

What about lift?[edit]

How come I see no mention about the lift a camshaft has built into it? It's also very important as duration. --24.127.56.118 23:11, 27 September 2007 (UTC) BannerRacing

Other Uses[edit]

This article is completely geared towards camshafts that are used in engines, however camshafts are also used in other fields. The company I work for uses them to actuate elements at specific times in reference to other actuating elements in order to recreate consistent action for each cycle of the camshaft. Perhaps a section should be added about how camshafts are utilized in other industries. --Wizard191 (talk) 14:36, 29 January 2008 (UTC)

True. after all, the internal combustion engine is just a modified piston air pump, which works the valves with a camshaft in the same way. not to mention all the electrical timers that use cams, like washing machines, etc. Gzuckier (talk) 17:54, 29 January 2008 (UTC)
I modified the article so that this is clear. It now reads:

A '''camshaft''' is a shaft to which a [[cam]] is fastened or of which a cam forms an integral part.<ref>[http://www.merriam-webster.com/dictionary/camshaft Camshaft definition by Merriam-Webster]</ref> ==Uses== In [[piston engine|internal combustion engines with pistons]], the camshaft is used to operate [[poppet valve]]s. It then consists of a cylindrical rod running the length of the [[cylinder bank]] with a number of oblong ''lobes'' or ''[[cam]]s'' protruding from it, one for each valve. The cams force the valves open by pressing on the valve, or on some intermediate mechanism, as they rotate.

King shaft ?[edit]

The "king shaft" (Königswelle) isn't mentioned here, and no article in english exists:

translated, the german article says:

The vertical shaft is a mechanical element. The shaft has at one or both ends taper or crown wheels, so that a rotational movement can be transferred into other directions. Also called a vertical shaft and the central shaft of a machine that transmits a rotational movement from a central drive to other parts of the machine, even if not the direction of the transmission changes. Contents [hide] A bevel in automotive technology Two shafts in the machine tool Three shafts in mills 4 References 5 References Shafts in automotive technology [Edit]

When the helicopter is driven by the engine to the rotor blades with a vertical shaft. The drive of the camshafts to control valve four-stroke engines to be partly solved with the bevel. These are valid from the perspective of speed strength and maintenance-free but as an ideal solution, but have found due to the relatively high manufacturing costs very little distribution. Well-known examples are the older motorcycle engines from Norton and Ducati, the latter combined with desmodromic valve control system, which opens the valve by valve lever not only, but also closes. In the Porsche 550 and the BMW Boxer engine with RS racing motorbikes came shafts are used. One of the few current examples is the two-cylinder engine of the Kawasaki W650. Among the few cars with camshafts driven by shafts include the Mercedes-Benz W06 1100 Alta Le Mans and Sports of the Englishman Geoffrey Taylor in 1932 [1]. Acquaintance is certainly the Porsche Carrera 356 (Fuhrmann-engine). From March 1974 to October 1993 was the royal wave as a "concept of technical language usage" for the standardized naming intermediate in the DIN standard 6260, part 3 "internal combustion engines and parts for reciprocating engines, motor control, terms listed and defined for the intermediate to explain: wave to bridge the gap crankshaft-camshaft. This national standard was replaced in November 1993 by the internationally harmonized standard DIN ISO 7967-3, in her intermediate absent. Rarely are constructions of four-stroke engines with camshafts that have the usual situation of a vertical shaft and press on, for example, setting targets (Chater-Lea) and leverage the valves. Such constructions are often - technically incorrectly - as a vertical shaft with mounted cam, cam, cam disk cam plate or means. Shafts in the machine tool [edit]

Older machines (in production) and special machines (machines for automation tasks) follow a machine concept that provides a central drive shaft through the whole machine through: the vertical shaft. By rounding up several different units along the vertical shaft driven. Especially with automation machines are specific to this output drives gearbox, as fitted curve and crank mechanism, which produce for the task required individual movement. A feature of this machine concept that all movements and tightly coupled units is running with the main drive. This means that is described for each angular position of the shafts, stand in any position, the movements and aggregates. Thus, one can be setup on one machine, for example by a hand crank to realize the vertical shaft. Therefore, automation machines are machines for this concept a little too flexible, as changes in manufacturing often associated with changes in the output arms of the royal shaft. Multi-spindle automatic lathes are a classic case of application of such drives. On them such as the mass production of turned parts for the mass production of automotive transmission gear wheels are produced. Constructive is a machine with vertical shaft a special challenge because many kinematic constraints must be respected. The assembly of the machine itself requires special skills, since they are usually incurred many time-consuming adjustment and Abstimmaufgaben. The shafts were initially displaced by the Rope drives before they were received in vehicle again. The use of the vertical shaft in conjunction with multiple output drives was therefore almost entirely by the CNC technology in conjunction with stepper or servo motors replaced, or there are simple movements, fulfill that need no special dynamic requirements, carried out by pneumatic or hydraulic cylinders. On machines, where each unit or each movement with its own these drives are fitted, the movements are not linked mechanically, but are usually due to an electronic logic controllers (PLCs) coordinates. Thus these machines are more flexible in their use, and many adjustment and Abstimmaufgaben be easier. Bevel in mills [edit]

In historical wind and water transfers the vertical shaft, the torque from the drive (or Windflügelrad waterwheel) on the grinder.

make article + add images of german wikipedia article —Preceding unsigned comment added by 91.182.185.184 (talk) 15:24, 3 August 2010 (UTC)

Play/lash[edit]

< Maintenance

The rockers or cam followers sometimes incorporate a mechanism to adjust and set the valve play through manual adjustment, but most modern auto engines have hydraulic lifters, eliminating the need to adjust the valve lash at regular intervals as the valvetrain wears, and in particular the valves and valve seats in the combustion chamber. >


(i) The word 'play' is hyperlinked to the article 'Engineering tolerance', but manufacturing imprecision is not the only reason for non-zero play!

(ii) The word 'play' is followed nineteen words later by the word 'lash' meaning the same thing, but does the average non-specialist wikireader know that?

86.3.108.41 (talk) 08:34, 20 June 2011 (UTC)