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Topic: Single overhead cam

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Double overhead cam

SOHC

Poppet valve

Pushrod

Camshaft

Reciprocating engine

Internal combustion engine

Mitsubishi Minica

Crankshaft

Steam engine

Zetec

Toyota M engine

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Toyota Supra

Subaru Alcyone

	Camshaft
		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.
		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.
		The main reason to use double overhead cams is to allow for more intake and exhaust valves.
	home.wanadoo.nl /xavira/camshaft/cam.htm (1534 words)

	Overhead camshaft - Wikipedia, the free encyclopedia
		A single overhead camshaft cylinder head from a 1987 Honda CRX Si.
		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 pushrod 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.
	en.wikipedia.org /wiki/SOHC (612 words)

	What you need to know about camshafts, valves, springs, rockers and rollers. (Site not responding. Last check: 2007-10-19)
		Overhead valve and flathead designs have their camshafts installed in the block, driven by either a timing chain and gear set or a timing gear set (without a chain).
		Overhead cam designs, as the name implies, have the camshaft located above the valves in the cylinder head.
		The high-tech 4.6L and 5.4L DOHC V-8s have twin overhead camshafts--one for intake valves and one for exhaust valves.
	mustangandfords.com /techarticles/127_0307_cams_explained/index3.html (307 words)

	Single overhead cam
		Single overhead cam (also SOHC) refers to the internal combustion engine design where one camshaft is located above the valves.
		SOHC engines are generally (but not always) limited to two valves per cylinder, one for intake and one for exhaust.
		While modern domestic manufacturers have only recently begun a large-scale implementation of overhead cam technology, it has been used in some domestic production vehicles intermittently at least since the 1960's, when Kaiser-Jeep produced the 230 cid "Tornado" SOHC inline six engine.
	www.reboom.com /article/SOHC.html (128 words)

	Double Over Head Cam - Dirt Rider . Net, Dirt Bikes - Motocross - Off-Road - Supercross
		Double overhead cam's is refering to the fact that there are two camshafts operating the valves.
		Single overhead cam usually incorperates a single valve for intake and a single valve for exaught.
		The cam directly operates the 2 intake valves and moves a rocker arm for the exhaust valves, rocker arm moves exhaust valves.
	www.dirtrider.net /forums3/showthread.php?t=80692 (504 words)

	Single overhead cam (Site not responding. Last check: 2007-10-19)
		Simply throw the single headliner latch, press a button and the rear deck...
		Single overhead cam (also SOHC) refers to the internal combustion engine design where one camshaft is located above the valves.
		SOHC engines are generally limited to two valves per cylinder, one for intake and one for exhaust.
	publicliterature.org /en/wikipedia/s/si/single_overhead_cam.html (83 words)

	2005 Ford Mustang Convertible: Technology
		VCT allows up to 50 degrees of cam variation in relation to the crankshaft angle.
		The cams operate both sets of valves using low-profile roller-finger followers, helping reduce friction, and keep the overall engine height – and thus, the hoodline – low.
		Cam position is controlled by an electronic solenoid that modulates oil pressure to advance or retard the cam timing based on input from the engine's electronic control computer.
	media.ford.com /print_doc.cfm?article_id=19905 (1395 words)

	Car Talk
		He maintains that the benefit of double overhead cams is that the cams can rotate at half the speed of a single overhead cam.
		The speed of a double overhead cam is exactly the same as a single overhead cam.
		Ray: The advantage of a double overhead cam is simply that it reduces friction and mass by improving the geometry at the top end of the engine.
	www.cartalk.com /content/columns/Archive/1998/July/03.html (652 words)

	Classic Mercedes - Camshafts: SOHC, DOHC
		To begin with, dual overhead cam, twin cam, multi-cam, and DOHC engines are all the same thing.
		Having two overhead cams refers to having an individual camshaft to operate the intake valves and one to
		Overhead valve and single overhead cam engines in passenger cars are on the way out.
	users.skynet.be /mercedes-benz/history/SOHC.html (868 words)

	How do these work? (Site not responding. Last check: 2007-10-19)
		There are no pushrods in a Single OverHead Cam(SOHC)=4.6 engine.There are lifters,or lash adjusters,though.In an OverHead Valve(OHV)=5.0 engine the pushrods go down through the head to the lifters that ride on the cam lobes themselves.The cam is in the valley between the cylinder banks and under the intake manifold.
		In OHV V-style engines, there is only one single cam in the whole engine that sits near the crank in the bottom of the V and pushes up on the pushrods which go up into the 2 heads.
		The cams in the OHC engines are turned by a timing chain or a timing belt that runs all the way up from the crank (at the bottom) to the head.
	www.mustangforums.com /m_711801/tm.htm (1625 words)

	Vintage Automobile Racing Engines
		Joe Gemsa cast these dual overhead cam heads for Model T Ford blocks but this is the only conversion he made for a Model A-B Ford block.
		There were at least two different versions of this single overhead cam engine, one with two intakes and another with four intakes.
		This dual overhead cam Model T Ford conversion engine was developed by Jack E. Gallivan and was available through his shop in Illinois from 1926 until 1930.
	winfield.50megs.com /Engines/Engines.htm (948 words)

	Camshafts Part II - Single Overhead Cam, Dual Overhead Cam and Pushrod Engines (Site not responding. Last check: 2007-10-19)
		A single camshaft simply cannot fit enough cam lobes to actuate all of those valves.
		This is the same as a double overhead cam engine because the engine has dual overhead cams just like in a double overhead cam engine.
		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)

	CARandDRIVER.com Glossary of Terms - Glossary Terms - Car and Driver
		Dive is caused by a load transfer from the rear to the front suspension; this transfer occurs because the car's center of gravity, through which all inertial forces pass, is higher than its contact patches, the points where the braking forces are exerted on the ground.
		In a valvetrain, pushrods are used to transfer reciprocating motion from the cam followers to a more distant part of a valvetrain, typically the rocker arms.
		Single overhead camshaft: an SOHC engine uses one camshaft in each cylinder head to operate both the exhaust valves and the intake valves.
	www.caranddriver.com /glossary/4534/caranddrivercom-glossary-of-terms.html (7074 words)

	Chrysler 3.5L OHC V6 Engine Service
		Left and right cams are different (the left one is longer) so they can't be interchanged, and the cams are installed into the heads from the rear so they can't be changed without removing the engine from the car.
		The belt-driven cam sprockets have D flats for rough alignment but no keyways - which means a special alignment procedure is required when the cams are installed or the timing belt is replaced to achieve correct valve timing.
		The cam bolt that holds the sprocket is then tightened to lock the sprocket in the proper position.
	www.aa1car.com /library/2004/us110422.htm (2329 words)

	SAE Off-Highway Engineering Magazine Online: Technical Innovations (March 2002)
		Honda opted for a single cam head with four valves.
		A single compression ring and an oil-control ring are sufficient for a racing-only engine.
		The single screen menu displays prompts and questions, then the system chooses the correct power supply settings for the operator.
	www.sae.org /ohmag/techinnovations/03-2002/page4.htm (1282 words)

	SORIANO OUTBOARD
		A 4 cylinder single cam in 1929 and a 6 cylinder single cam in 1931.
		1931 add from OSSA displaying an early Soriano 6 cylinder single overhead cam, with the early lower unit identical to the one used on the 4 cylinder motors.
		On the "Jean Dupuy" motors (Dual Cam Soriano) and all the "Romani" motors, it was used to drive the fuel pump.
	www.soriano-outboard.com /12395.html?sessionidkey=sessionidval (1432 words)

	Untitled Document
		AFX Dual Overhead Cam or Single Overhead Cam for 96 Neons.
		AFX Dual Overhead Cam or Single Overhead Cam for 97-99 Neons.
		AFX Dual Overhead Cam or Sinlge Overhead Cam for 00 Neons.
	www.thecarshopny.com /catalog_main.php3?category=3 (567 words)

	Cartrackers.com (Site not responding. Last check: 2007-10-19)
		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)

	427 SOHC -- The Ford V-8 Engine Workshop
		To meet this new competition, Ford secretly developed an overhead cam version of the high performance FE block, the legendary 427 SOHC.
		Close tolerance is maintained between the ends of the pins and the snap rings to prevent unwanted hammering by the pin.
		Due to sharing a common cylinder head between left and right banks, and the layout of the cam lobes and followers, results in five bearing journals on the left bank, and six on the right.
	phystutor.tripod.com /stang/engines/427sohc.html (1037 words)

	Triples Online - Prototypes - SOHC
		It was immediately apparent that locating the cam directly across the cylinder head between the inlet and exhaust valves prevented any easy access to the center spark plug.
		As might be expected the main problems were sorting out the cam timing and the correct oil supply to the cam.
		Various cam and ignition timing settings were tested after the drive-side piston holed and cam faces were badly scored.
	www.triplesonline.com /bikes/prototypes/p68.asp (380 words)

	Mustang Heaven - 2005 Ford Mustang
		Ford’s "dual-equal" variable cam timing design shifts timing of both the intake and exhaust valves together, with one camshaft per cylinder head.
		The cams operate both sets of valves using low-profile roller-finger followers, helping reduce friction and keep the overall engine height – and thus, hood line – low.
		It features low-profile heads with single overhead cams driven by a slave shaft mounted in the "V" of the engine.
	www.mustangheaven.com /2005mustang/powert.htm (2519 words)

	[No title] (Site not responding. Last check: 2007-10-19)
		With the power of an 805cc V-twin engine, it features a single overhead cam and a single-pin crankshaft for that classic V-twin rumble, while a gear driven balancer helps to reduce vibration.
		Concealed automatic cam chain tensioners preserve the engine's clean lines and maintain precise cam timing, while a spin-on oil filter helps make maintenance a quick and easy job.
		At the rear of the single backbone, double-cradle frame is a sleek, triangulated steel swingarm and Kawasaki UNI-TRAK® linkage rear suspension system, which provide a smooth ride while maintaining the retro look of a hard tail cruiser.
	www.buykawasaki.com /product_print.aspx?product=29 (292 words)

	Chrysler's New 4.7L Engine
		The cams are each driven by a separate chain, each of which are driven off an idler, in the approximate location of the ol'LA's cam sprocket.
		In fact, the cams, being hollow, are used to bring oil to the intake lobes, which have oiling holes.
		The ports are 1.86 square inches at the port face, and the injectors are mounted to the port in the head, not the intake manifold, which as we shall see, is made of polymer.
	dodgeram.org /tech/gas/Cammer/4_7_v8.html (3807 words)

	SOHC/4.net - Home
		Though single overhead cam technology was soon supplanted by the double overhead cam engine, the simplicity and durability of these engines has rarely been topped.
		The SOHC/4 Owners Community is a place where owners of the Honda single overhead cam fours gather to talk bikes, organize rides, and help with the wrenching.
		We've built this website as a portal to our discussion forums and mailing list and as a place where articles, technical documents, photos, and other information on these bikes can be made permanently available.
	www.sohc4.us (229 words)

	Neon FAQ: PL2k Drivetrain
		A running change made during the 2000 model year was the move to 3-bead keepers on the valves instead of the single bead that was in use.
		Both sets of cams will physically fit in either engine but the profiles are not well suited to the wrong application.
		Also, the cam timing magnet, which is read by the cam position sensor as it rotates, is located 90 degrees off between the two cams, which leads to timing issues unless accommodated.
	faq.neons.org /2kfaq/FAQ_2KET.html (2989 words)

	DOHC, SOHC, and Pushrod Engines
		With a camshaft sitting above the valve, all you have is some sort of lash adjuster (aka lifter) riding on the cam and the lifter rides on the valve.
		Putting the cam in the block and actuating the valves, through rockers, with pushrods works quite well, too.
		You can have four valves per cylinder with a pushrod (cam in block) engine, you just have to get fancy with the rockers and pushrods.
	www.allpar.com /eek/cams.html (854 words)

	Cars (Site not responding. Last check: 2007-10-19)
		Single coat: A coat of paint, with each stroke overlapping the previous stroke by 50%.
		Single leading brake shoe: The use of a single hydraulic plunger and a common pivot point which expands two shoes against the drum with equal pressure whether braking from forward or reverse direction.
		SOHC: Refers to an engine with a single overhead camshaft to operate both intake and exhaust valves.
	maxpages.com /carsinhistory/S_2 - !http://maxpages.com/carsinhistory/S_2 (2917 words)

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