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• Ohv
  ...er head]] containing two [[overhead camshaft]]s, one above each of the two valves]] ...rnal combustion engine]] is one in which the entry and exit [[poppet valve|valves]] and ports are contained in the [[cylinder head]].
  1 KB (146 words) - 09:59, 27 September 2009
• Ohc
  ...inder head]]s, above the combustion chambers, and drive the [[poppet valve|valves]] or [[lifter]]s directly instead of using [[pushrod]]s. ...engines today employ [[Variable Valve Timing]] and [[multi-valve|multiple valves]] to improve efficiency and power. OHC also inherently allows for greater e
  4 KB (549 words) - 18:19, 17 July 2009
• DOHC
  ...hows two overhead camshafts—one above each of the two [[poppet valve|valves]].]] [[double overhead cam]]
  3 KB (410 words) - 14:33, 24 September 2009
• Cylinder head
  ...g|thumb|200px|The cylinder head from a [[GMC]] [[van]]. The [[poppet valve|valves]] and part of the exhaust [[manifold (automotive engineering)|manifold]] ar ...at higher [[Revolutions per minute|rpm]], leading to the adoption of the [[overhead valve]] head design.
  3 KB (415 words) - 23:56, 20 September 2009
• Overhead cam
  ...hows two overhead camshafts—one above each of the two [[poppet valve|valves]].]] ...alve|valves]] or [[lifter]]s in a more direct manner, when compared with [[Overhead valve]]s (OHV) and [[pushrod]]s.
  6 KB (952 words) - 17:33, 7 August 2009
• Valvetrain
  ...d to described the mechanisms and parts which control the operation of the valves. ...s slightly in layout but still performs the task of opening and closes the valves at the time necessary for proper operation of the engine. These layouts are
  3 KB (501 words) - 00:38, 3 December 2009
• Overhead camshaft
  ...inder head]]s, above the combustion chambers, and drive the [[poppet valve|valves]] or [[lifter]]s directly instead of using [[pushrod]]s. This arrangement i ...engines today employ [[Variable Valve Timing]] and [[multi-valve|multiple valves]] to improve efficiency and power. OHC also inherently allows for greater e
  5 KB (694 words) - 08:50, 8 October 2009
• Camshaft
  ...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 r ...nd the rotation of the [[crankshaft]] is of critical importance. Since the valves control the flow of fuel intake and exhaust, they must be opened and closed
  4 KB (658 words) - 19:44, 31 March 2009
• Pushrod
  ...e engine block between the camshaft and pushrods. The later [[overhead cam|overhead cam (OHC)]] design avoids the use of pushrods by putting the camshaft in th ...combustion engine]] is one in which the intake and exhaust [[poppet valve|valves]] and ports are contained in the [[cylinder head]].
  8 KB (1,302 words) - 08:11, 14 June 2009
• Taurus
  ...ith single [[cylinder]] [[engines]] from 175 to 500 cc and [[valves]] with overhead [[camshaft]], some with a rear [[suspension]] [[torsion bar]]. ...r, Taurus built [[mopeds]] and [[motorcycles]], including a 175 cc with an overhead camshaft and a two-stroke 160 cc and 250 cc engine with a valve in the head
  1 KB (197 words) - 14:02, 27 November 2016
• G.R.
  ...lli is put into production with a 500 cc ''JAP'' engine, with distribution overhead valve and a three-speed gearbox.
  1 KB (148 words) - 23:04, 2 October 2009
• Flathead engine
  ...block beside the [[piston]], instead of in the [[cylinder head]], as in an overhead valve or [[OHV]] engine. The design was common on early engine designs, but ...valve-in-block" engine. It may also lead to slighly easier cooling, as the valves and operating rods are out of the way of the cylinder, making a cooling jac
  3 KB (479 words) - 22:45, 8 September 2009
• Bugatti Type 18
  ...aight-4]] engine with [[multi-valve|3 valves per cylinder]] and a [[single overhead cam]]shaft. This large engine had a 100 mm bore and very long 160&nbs
  1 KB (153 words) - 11:18, 14 June 2009
• Thunder
  ...motorcycles]] that built a very modern 127 cc, parallel with twin overhead valves, for that time.
  627 bytes (88 words) - 13:08, 20 April 2010
• Pushrod engine
  ...design which places the camshafts within the cylinder head and drives the valves directly or through short rocker arms, called fingers. * I-head, also known as overhead valve (OHV)
  10 KB (1,635 words) - 08:54, 4 August 2009
• Poppet valve
  ...alve|Presta]] and [[Schrader valve]]s used on tires are examples of poppet valves. The Presta valve has no spring and relies on a pressure differential for o Poppet valves are used in many industrial process from controlling the flow of rocket fue
  5 KB (840 words) - 08:50, 8 October 2009
• GRG
  ...6 cc engines two cylinder and a 173 cc single [[cylinder]] with overhead [[valves]] and using [[Della Ferrera]] linkage.
  763 bytes (99 words) - 09:47, 16 April 2010
• Fully Integrated Robotised Engine
  ...ersions from 999 cc to 1372 cc with both 8- and [[multi-valve|16-valves]]. Mechanically they are simple [[straight-4]] engines with five bearings and [[overhead cam]] heads.
  831 bytes (122 words) - 08:13, 8 October 2009
• SAR
  ...AR had a 498 cc two cylinder [[boxer engine]] with side and later overhead valves. From 1924 there was a 346 cc single cylinder with an [[oil-cooled]] engine
  850 bytes (114 words) - 15:36, 19 April 2010
• Daino
  ...gine. The engines were fitted with [[aluminum]] [[pistons]] and [[overhead valves]]. This fast 75 km/h car used [[brakes]] that were mounted on the rear whee
  867 bytes (118 words) - 10:57, 7 February 2012
• Quota 1100 ES
  |Valves and Operation || 2 overhead valves with light alloy push-rods
  2 KB (275 words) - 22:58, 27 February 2009
• Comet
  ...ensive. Models included a 173cc single OHV as well as 173cc and 246cc twin overhead-cam vertical. [[Alfonso Drusiani]] was the designer and manufacturer. [http ...siani Bologna). It had a engine with side by side 173.6 cc cylinders, with valves in the head tilted 40 ° and driven by two camshafts in the head. The four
  2 KB (269 words) - 22:38, 6 February 2011
• Ferrari Colombo engine
  ...k of cylinders with a 60° angle between the two banks. The engine had two valves per cylinder fed through three Weber 30DCF [[carburettor]]s. A 7.5:1 [[com ...ne was further modified with [[dual overhead camshaft]]s (though still two valves per cylinder) and a two-stage supercharger. This combination gave the car
  7 KB (1,080 words) - 23:07, 7 August 2009
• Alfa Romeo Twin Cam engine
  * [[Double overhead camshaft]]s driven by a double row timing chain * Camshafts directly actuate valves via bucket tappets
  5 KB (646 words) - 14:34, 15 June 2009
• Multi-valve
  ...(or '''multivalve''') when each cylinder has more than two [[poppet valve|valves]]. ...and fuel, and another for ''exhaust'' of combustion products. Adding more valves improves the flow of intake and exhaust gases, potentially improving combus
  5 KB (662 words) - 07:50, 7 December 2010
• Bugatti Type 50
  ...8]] engine with [[multi-valve|3 valves per cylinder]] driven by a [[single overhead cam]]shaft. Power was reported at 140 hp (104 kW). The engine w
  2 KB (335 words) - 11:17, 14 June 2009
• Short block
  On overhead valve and flathead engines, the [[camshaft]] may also be installed. If the On flathead engines, valves may be installed.
  2 KB (278 words) - 22:48, 11 June 2009
• CM
  ...00 cc, with a four-stroke engine valve head. In 1934 the first 250 cc with overhead camshaft. ...1947, leaves a new motorcycle, the Gheppio 250, with change to four-speed overhead camshaft. Alongside this, they list the 250 and 500 enduro bike named the S
  2 KB (346 words) - 11:18, 5 July 2010
• Colombo
  ...e 9". It was powered with a 4-cylinder 1300 cc engine, overhead valves, an overhead camshaft with a three-speed gearbox. The vehicle was produced until the end
  2 KB (339 words) - 19:25, 18 November 2009
• Hemi engine
  ...|The 1903 Premier engine had a gear-driven [[SOHC#Single overhead camshaft|overhead cam]], roller cam followers, and crossflow hemi heads.]] ...spherical combustion chamber design, the intake and exhaust [[poppet valve|valves]] are usually on opposite sides of the chamber, unlike the in-line valve ar
  10 KB (1,448 words) - 21:41, 16 July 2008
• Cam in block
  ...design which places the camshafts within the cylinder head and drives the valves directly or through short rocker arms, called fingers. * I-head, also known as overhead valve (OHV)
  11 KB (1,698 words) - 08:59, 8 October 2009
• Ferrari 125 F1
  ...k of cylinders with a 60° angle between the two banks. The endine had two valves per cylinder fed through one Weber 40DOC3 or 50WCF [[carburettor]]. With j ...ne was further modified with [[dual overhead camshaft]]s (though still two valves per cylinder) and a two-stage supercharger. This combination gave the car
  5 KB (617 words) - 22:06, 12 July 2009
• Dardo
  ...l [[cylinder]], the [[combustion chamber]] was [[hemispherical]] and the [[valves]] were arranged above the cylinder head, perpendicular to the axis of the c
  1 KB (223 words) - 19:56, 22 November 2010
• Cam-in-block
  ...design which places the camshafts within the cylinder head and drives the valves directly or through short rocker arms. * I-head, also known as [[overhead valve]] (OHV)
  11 KB (1,817 words) - 11:16, 30 January 2011
• Borgo
  ...first single line of models were the 498, 693 and 827 cc with the [[intake valves]] on the exhaust. In 1911 they adopted the use of aluminum pistons and in 1 ...921 Borgo constructed a 477 cc V-twin overhead valve race engine with four valves per cylinder. In 1925 an engine block published a version was the last engi
  3 KB (397 words) - 06:09, 3 October 2016
• Bugatti Type 49
  ...mm and [[multi-valve|three valves per cylinder]] were used with a [[single overhead camshaft]].
  4 KB (534 words) - 21:27, 31 July 2009
• Bandini 1300
  ...lubricants carter dry, distribution chain and double overhead camshaft, 16 valves, with indirect injection pump mechanics. ...league cup d '[[aluminium]], [[head]] alloy[[DOHC]] distribution chain , 4 valves per cylinder vertical
  4 KB (499 words) - 22:31, 23 September 2009
• Bugatti Type 30
  ...mm and [[multi-valve|three valves per cylinder]] were used with a [[single overhead camshaft]].
  4 KB (552 words) - 11:10, 14 June 2009
• VR6 engine
  ...k camshaft operates the left bank exhaust valves and the right bank intake valves. This is most similar to a [[DOHC]] Inline-6 engine. ...ssflow cylinder head with two valves per cylinder operated by chain-driven overhead camshafts. All fuel and ignition requirements of the VR6 engine are control
  13 KB (2,025 words) - 21:40, 16 July 2008
• Alfa Romeo V6 engine
  .../Milano Verde]], where it produced 183 hp (136 kW), still with 2 valves per cylinder. This engine was modified for [[transverse engine|transverse] The engine was upgraded to dual overhead cams and four valves per cylinder in 1993. Along with other refinements, this engine produced 2
  5 KB (604 words) - 19:25, 2 March 2009
• Romeo Autotutto
  |Motor || 4-cylinder line with two overhead, chain-driven camshafts and two valves per. cylinder. The engine block and cylinder head of aluminum. Bore 74 mm. ...eed of 75 km/h. Petrol engine was a 4-cylinder line with two chain-driven, overhead camshafts, a compression of only 7,5:1 and peak power of 37hp at 3,500 rpm,
  5 KB (715 words) - 10:10, 3 June 2009
• Alfa Romeo RL
  in 1921 by [[Giuseppe Merosi]]. Car had straight-6 engine with overhead valves. Three different versions was made: Normale, Turismo and Sport.
  3 KB (390 words) - 09:16, 31 May 2009
• Engine tuning
  ...often more practical to have several small valves than have larger single valves. ...of the valve rockers ([[Overhead valve|OHV]] engines), or cam followers ([[Overhead cam|OHC]] engines).
  9 KB (1,414 words) - 23:32, 3 July 2009
• Aquila
  ...at [[Turin]]. [[Cappa]], a young engineer, was already studying [[overhead valves]] and aluminium [[pistons]], and when their first car appeared at the [[Tur ...th an ever increasing number of technical innovations including [[overhead valves]], [[tubular conrods]], [[spherical-bearing]] mounted [[crankshaft]], alumi
  6 KB (690 words) - 06:30, 3 October 2016
• FATA
  ...ew models in 1925. The '500' was an evolution of the '400' with [[overhead valves]] and 26[[bhp]] plus a longer [[chassis]], a four-speed gearbox throughout
  2 KB (347 words) - 18:50, 31 October 2010
• Four-stroke
  ...ugh the intake (inlet) port. The intake (inlet) [[poppet valve|valve]] (or valves) then close(s), and the following upward stroke (''compression'') compresse ...spent exhaust gases from the cylinder past the then-open exhaust valve or valves, through the exhaust port.
  11 KB (1,765 words) - 11:04, 10 November 2005
• Ferrari Lampredi engine
  ...he slowest racing courses. Lampredi built a prototype with [[multivalve|4 valves per cylinder]] and 2493 cc of displacement. It produced 175 hp o ...a high-tech marvel for the time with [[dual overhead camshaft]]s pushing 2 valves per cylinder and twin-plug ignition.
  8 KB (1,137 words) - 16:43, 13 June 2009
• Della Ferrera
  ...n 1913, which had the cylinders arranged in a longitudinal V, with a 500cc overhead valve distribution. ...rted on a single cylinder 175cc engine with vertical distribution overhead valves operated by push-rods and rockers, and a three speed gearbox that could be
  5 KB (707 words) - 10:53, 18 December 2016
• Four-stroke cycle
  ...ugh the intake (inlet) port. The intake (inlet) [[poppet valve|valve]] (or valves) then close(s), and the following upward stroke (''compression'') compresse ...spent exhaust gases from the cylinder past the then-open exhaust valve or valves, through the exhaust port.
  11 KB (1,775 words) - 09:48, 2 August 2009

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