
	Where results make sense

Topic: Overhead camshaft

Related Topics

double overhead camshaft

overhead camshaft

overhead wires

Double overhead cam

overhead projectors

overhead information

transparency overhead projector

dual overhead cam

overhead join

overhead transparencies

overhead cam

double overhead camshaft

In the News (Tue 29 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Camshaft arrangement for multi valve engine - Patent 4979474
		The camshaft 55 is journaled, in a manner to be described, for rotation about a camshaft axis that extends parallel to the aforenoted plane and which may be offset slightly from one side thereof toward the intake valves 38 and 39.
		The camshaft 55 is also provided with a pair of exhaust lobes 69 which lobes are each disposed between a respective one of the bearing surfaces on the camshaft that cooperate with the cylinder head bearing surfaces 57 and 58 and the portions of the camshaft which cooperate with the cylinder head bearing surfaces 56.
		In addition, the camshaft 101 is provided with a first intake lobe 102 that is disposed between the camshaft bearing areas 57 and 58 and a second intake lobe 103 that is disposed between the bearing area 58 and the exhaust cam lobe 69 adjacent the cylinder head bearing area 55.
	www.freepatentsonline.com /4979474.html (3116 words)

	Overhead Camshaft SOHC,DOHC & more... - JDM Universe.com
		A double overhead camshaft (also called double overhead cam, dual overhead cam or twincam) valvetrain layout is characterized by two camshafts being located within the cylinder head, where there are separate camshafts for inlet and exhaust valves.
		The camshaft (or camshafts, depending on the design employed) is located above the valves within the cylinder head, and operates either indirectly or directly on the valves.
		The valves are typically operated by a camshaft, which is a rod with a series of projecting cams (lobes), each with a carefully calculated profile designed to push the valve open by the required degree at the right moment and to hold it open as required as the camshaft rotates.
	www.jdmuniverse.com /forums/showthread.php?p=888864#post888864 (5206 words)

	Overhead camshaft information - Search.com (Site not responding. Last check: 2007-10-08)
		Single overhead camshaft is a design in which one camshaft is placed within the cylinder head.
		The cams operate the valves directly or by a short rocker as opposed to overhead valve cam-in-block engines, which have tappets and long pushrods to transfer the movement of the lobes on the camshaft in the engine block to the valves in the cylinder head.
		Double overhead camshafts are not required in order to have multiple inlet or exhaust valves, but are necessary for more than 2 valves that are directly actuated (though still usually via tappets).
	c10-ss-1-lb.cnet.com /reference/Overhead_camshaft?redir=1 (601 words)

	:: Matrix Integrated :: Tuned To The German Automotive Soul ::
		Camshaft: A shaft having lobes driven by the crankshaft via gears, chains, or belts that, in turn, opens and closes the intake and exhaust valves at proper intervals.
		Camshaft lift: How far a valve is pushed open, as determined by the height of the cam lobe and the geometry of the rocker arms on a push rod engine, or the cam followers on an overhead cam engine.
		Camshaft plug: A plug found in the rear of the engine block, at the camshaft, to retain and direct oil to the rear camshaft bearings.
	www.matrixintegrated.cc /glossary_engine.php (8347 words)

	Guide to Camshaft Technology - Tech Article - Chevy High Performance Magazine
		Our camshaft discussion centers on typical small- and big-block Chevys, which have the camshaft located through the top centersection of the engine block and incorporate the use of 16 respective lifters, pushrods, and rocker arms to actuate valve movement.
		As the camshaft continues to revolve, the lifter moves downward on the lobe and the valve is closed with a valvespring.
		Camshaft lifters are sometimes called followers or tappets and are the components that make direct contact with the camshaft lobe.
	www.chevyhiperformance.com /techarticles/148_0405_camshaft_terms_guide (1015 words)

	Cartrackers.com (Site not responding. Last check: 2007-10-08)
		Overhead Cam The type of valvetrain arrangement in which the engine's camshaft(s) is in its cylinder head(s).
		When the camshaft(s) is placed close to the valves, the valvetrain components can be stiffer and lighter, allowing the valves to open and close more rapidly and the engine to run at higher rpm.
		Overhead Valve (OHV) An acronym for overhead valve.
	www.cartrackers.com /auto_glossary/o (695 words)

	Muscle Car Tales
		The overhead camshaft is also something that we think of as a relatively new development, but it's not.
		The double overhead cam shaft (DOHC) is the same as the overhead camshaft, except that there are two camshafts instead of one.
		Usually this type of engine has the camshaft mounted in the cylinder block, and the valves are opened and closed by push rods.
	groups.msn.com /musclecartales/engineterms1.msnw (1287 words)

	camshaft_introduction
		According to definition, a camshaft is a shaft with cam lobes which is driven by gears, a belt, or chain from the crankshaft.
		Hydraulic- This type of camshaft uses a hydraulic lifter, which means it is much quieter than a solid lifter camshaft and produces excellent power and reliability and if very cost efficient.
		Overhead Camshaft - Most modern engines use this type of camshaft due to the ability to create a high rev engine that can perform, and still get the gas mileage that people are looking for.
	www.bsu.edu /web/jnmoore/camshaft_introduction.html (338 words)

	CanadianDriver: Auto Tech - Pushrods vs overhead cams - which is better?
		If one camshaft is used, it is often referred to as a SOHC or single overhead camshaft engine.
		DOHC of double overhead camshaft engines allow the designer to vary camshaft timing for the intake and exhaust valves separately because one camshaft operates the intake valves while the other operates the exhaust valves.
		There are even overhead camshaft engines that use pushrods too, but these pushrods are very short and don't pass through the engine block or cylinder head casting.
	www.canadiandriver.com /articles/jk/040421.htm (836 words)

	MG twin Cam Racing Cams - Features - European Car Magazine
		Overhead valves were considered quite advanced when they appeared on Oldsmobile's Rocket V-8 engine and Cadillac's V-8 of 1949 and William Lyon's remarkable double overhead cam six-cylinder Jaguar XK engine seemed radical when it was introduced as a production engine in 1948.
		The double overhead camshaft engine has an aluminum head that has been machined from a solid billet and with its engine-turned surface is described as looking like a Type 51 Bugatti.
		The twin overhead camshafts ride in five bearings and are driven with Offenhauser gears that are in turn driven by chain from an extra gear attached to the original camshaft.
	www.europeancarweb.com /features/0506ec_twin_cam_mg_racing_engines (2275 words)

	Camshaft
		The camshaft uses lobes, called cams, that push against the valves to open them as the camshaft rotates; springs on the valves return them to their closed position.
		Usually, double overhead cams are used on engines with four (or more) valves per cylinder -- a single camshaft simply cannot fit enough cam lobes to actuate all of those valves.
		This can limit the speed of pushrod engines; the overhead camshaft, which eliminates the pushrod from the system, is one of the engine technologies that made higher engine speeds possible.
	home.wanadoo.nl /xavira/camshaft/cam.htm (1534 words)

	Camshaft Basics
		Webster's Dictionary defines 'camshaft' as "a shaft bearing integral cams." Webster's defines a 'cam' as a disk or cylinder having an irregular form such that its rotary motion gives to a part or parts in contact with it a specific rocking or reciprocating motion.
		If an engine has two overhead camshafts, one to operate the intake valves and the other for the exhaust, it is called a DOHC (Double OverHead Camshaft) engine.
		For overhead cam engines (OHC), the camshaft is mounted above the valve and stem and the lobe of the cam directly actuates the stem, causing the valve to open and close at a time and rate determined by the 'profile' of the cam.
	www.oregoncamshaft.com /cam-basics.html (1128 words)

	Project Potent Rodent: Overhead Auxiliary Camshaft Oiler - Chevy/GM at Off-Road.com
		The big block's poor oiling system and the angle at which the lifters are situated are the primary causes of this failure.
		This area is located above the front bearing of the camshaft and an inch towards the passenger side of the engine.
		Not to mention, this oil kit will reduce friction between the lifters and camshaft, which means improved power and gas mileage.
	www.off-road.com /chevy/reviews/bbc_oiler (988 words)

	Valves and Valve Mechanisms
		camshaft rotates, the cam lobe moves up under the valve tappet, exerting an upward thrust through the tappet against the valve stem or a pushrod.
		On the overhead camshaft engine, such as the Murphy diesel, the camshaft is located above the cylinder head.
		The stresses on the camshaft are small; therefore, the bushings are not adjustable and require little attention.
	www.tpub.com /machines/12j.htm (670 words)

	Overhead camshaft - Free net encyclopedia (via CobWeb/3.1 planetlab2.tamu.edu) (Site not responding. Last check: 2007-10-08)
		In straight engines this means there is one camshaft in the one head, while in a V engine there are two camshafts: one per cylinder bank.
		Instead the cams operate the valves directly or by a short rocker as opposed to overhead valve cam-in-block engines, which have long pushrods to transfer the movement of the lobes on the camshaft in the engine block to the valves in the cylinder head.
		Image:DOHC-Zylinderkopf-Schnitt.jpg A double overhead camshaft (also called double overhead cam, dual overhead cam or twincam) valvetrain layout is characterized by two camshafts being located within the cylinder head, where there are separate camshafts for inlet and exhaust valves.
	www.netipedia.com.cob-web.org:8888 /index.php/OHC (541 words)

	Camshafts Part II - Single Overhead Cam, Dual Overhead Cam and Pushrod Engines
		On single and double overhead cam engines, the cams are driven by the crankshaft, via either a belt or chain called the timing belt or timing chain.
		The key difference is that the camshaft on a pushrod engine is inside the engine block, rather than in the head.
		The overhead camshaft, which eliminates the pushrod from the system, is one of the engine technologies that made higher engine speeds possible.
	www.streetracersonline.com /articles/camshafts/2.php (664 words)

	SOHC Engines Vs. DOHC Engines
		In a pushrod engine there is one camshaft in the center of the trough made by the V. Here are the sequence of events: The camshaft rotates.
		This occurs of course after the lobe on the camshaft is away from the pushrod.
		The advantage to using this camshaft position is that a single camshaft runs all cylinders.
	www.angelfire.com /hiphop3/ppddaiddddyy/SOHC.html (436 words)

	Engines
		The camshaft operates directly on bucket tappets (cam followers); valve clearance adjustment is by shims inserted between tappet and valve stem.
		These include the camshaft drive, which is of toothed belt type, and the oil pump, which is chain driven from the crankshaft.
		Introduced in July 1987, the essential difference is the 16-valve double overhead camshaft cylinder head, the camshafts being driven by a toothed belt tensioned by two idler rollers.
	www.citroenz.com /BX/Engines.html (1139 words)

	OHV - The real meaning from Timesharetalk wikipedia (Site not responding. Last check: 2007-10-08)
		In automotive engineering, an overhead valve internal combustion engine is one in which the intake and exhaust valves and ports are contained in the cylinder head.
		The original overhead valve or OHV piston engine was developed by the Scottish-American David Dunbar Buick.
		Today the technology is widespread, and the term, "OHV", is generally used to differentiate a pushrod engine from one which uses overhead cams, although both types employ overhead valves and so are both OHV engines.
	www.timesharetalk.co.uk /wiki.asp?k=OHV (184 words)

	The Parilla 250
		It was a single cylinder, single overhead camshaft four stroke 250cc motorcycle.
		The engine features a large alloy finned head and a high mounted camshaft which is chain driven from the crank.
		The pushrods are thoughtfully enclosed in rubber boots and the overhead valves are controlled by hair-pin valve springs.
	www.vf750fd.com /motorbikes/parilla.html (1123 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		This is an engine with a pair of camshafts in the top of the cylinder head.
		Overhead Valve is comparably not as efficient as the overhead camshafts engine.
		There is no camshafts involved in the cylinder and the engine intake and exhaust are controlled by the valves.
	www.angelfire.com /super/need4speed/technical_terms.html (1753 words)

	Mopar - Original Equipment Parts and Accessories
		With this design, a longer drive mechanism, usually a belt, is required, due to the increased distance between the crankshaft and camshaft(s).
		Before the belt is removed, however, the camshaft timing marks must be aligned (this must be done on all engines).
		Before installing the new belt, set the camshaft timing marks so that the exhaust cam sprocket (on the left as viewed looking toward the front of the engine) is 1/2 notch below the intake cam sprocket.
	www.mopar.com /street/tech1000.htm (1102 words)

	OHV and OHC Multivalve tech
		OHV (Overhead Valve) SOHC (Single Overhead camshaft), and DOHC (Double Overhead Camshaft) are all terms to describe the cylinder head layout of a modern piston engine.
		To open a valve, the camshaft pushes on a lifter, which pushes a pushrod, which pushes on a rocker am, which opens the valve.
		The camshaft is in the cylinder head, and the camshaft opens the valve either almost directly (with a shim between the cam lobe and valve stem), or by actuating on a rocker arm.
	www.datsuns.com /Tech/ohv_vs_ohc.htm (1068 words)

Try your search on: Qwika (all wikis)