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A dual overhead cam, double overhead cam, or twin-cam engine has two camshafts over each bank of the cylinder head, [1] [2] one for the intake valves and another for the exhaust valves. Therefore there are two camshafts for a straight engine and a total of four camshafts for a V engine or a flat engine.
Harley-Davidson Twin Cam engine at the Harley-Davidson Museum. The Harley-Davidson Twin Cam are motorcycle engines made by Harley-Davidson from 1998 to 2017. Although these engines differed significantly from the Evolution engine, which in turn was derived from the series of single camshaft, overhead valve motors that were first released in 1936, they share a number of characteristics with ...
The Peugeot 500 M (1913-1914) was a French racing motorcycle designed by Ernest Henry in 1913. It was a "technical tour de force" as the first motorcycle ever designed with a dual overhead camshaft. It also used a multi-valve cylinder head, with four valves per cylinder. [2] [3]
In 1914 Henry adapted his automobile engine design for a new 500 cc straight-twin engine racing motorcycle. The Peugeot 500 M racing motorcycle was the world's first motorcycle to use a double overhead camshaft cylinder head; the twin camshafts were driven by a cascade of gears between the cylinders, and used 4 valves per cylinder. The new ...
The Ducati Superquadro engine is a 90° V-twin four-stroke motorcycle engine made by Ducati since 2011. It has Ducati's signature desmodromic valve system, with four valves per cylinder and gear/chain driven double overhead camshafts.
Valve Gear: Belt-driven dual overhead cams, 4 valves per cylinder, variable timing and lift [3] 92-96 versions use closed-deck blocks, while the 97-01 versions used open-deck blocks; All h22 variants use FRM cylinder liners
MZ manufactured a line of 125 cc four-stroke motorcycles using an engine that was designed in-house. The MZ 125 produces 15 bhp (11 kW) and nearly 10 lb⋅ft (14 N⋅m) of torque. It is a liquid-cooled, dual-overhead-cam design with four valves, high-voltage electronic ignition and an 11,000 rpm ignition cut-off.
The Honda VF750F is a street bike designed by Honda from 1983 to 1985. It has an 86 hp (64 kW), liquid-cooled, V4 engine which sports dual overhead cams (DOHC). The V4s were started a year before with the 1982 Honda Magna VF750C and Sabre VF750S [2] but were adapted for the VF750F in 1983 by reducing the six speed transmission to a five speed because of the change from shaft drive to chain.