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DOHC design (for a V12 engine) 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.
The Ford I4 DOHC engine is a cast iron block 4-cylinder inline internal combustion engine with twin overhead camshafts, produced by the Ford Motor Company at Dagenham Engine Plant. It was initially available as a 2.0-litre 8-valve version, and later in 2.0 and 2.3-litre 16-valve versions from 1989 to the end of production of the MK2 Ford Galaxy ...
Developed in the late 1980s by the Ford Motor Company, the Ford Zeta engine was a straight four, double overhead cam internal combustion engine intended to replace the Pinto and CVH models. The Zeta shared some parts with other Ford engines developed at the time, including the smaller Sigma I4 and larger Duratec V6. The engine shares its bore ...
The AR engine family is an Inline-4 piston engine series by Toyota, first introduced in 2008 for the RAV4, and subsequently for the Highlander, Venza, Camry and Scion tC. The AR series uses a die-cast aluminium engine block and aluminium DOHC cylinder head.
In 1982 the German company Dr. Schrick GmbH, later renamed AVL Schrick, developed a double overhead camshaft (DOHC) multi-valve cylinder head for the 1.6 L CVH block. [20] [21] Each of the two overhead camshafts is installed in a separate camshaft carrier that is attached to the main body of the cylinder head. Each carrier has its own cam cover.
It was also used in the Focus ST170 with a cylinder head modified by Cosworth with Variable Valve Timing on the inlet cam and had 170 bhp (127 kW; 172 PS). The Zetec can be identified by its silver cam cover with "DOHC 16v" on the bottom left. The Zetec-E has "ZETEC 16v" on the bottom left, and the Zetec-R has a black plastic cam cover.
cast aluminium alloy; four unequal-length valves per cylinder, 24 valves total, low-friction roller finger cam followers with automatic hydraulic valve clearance compensation, simplex roller chain-driven double overhead camshaft (DOHC – one camshaft for all exhaust valves, and one for all intake valves), continuous timing adjustment variable ...
The RB engine family includes single overhead camshaft (SOHC) and double overhead camshaft (DOHC) engines. [4] Both SOHC and DOHC versions have an aluminium head. The SOHC versions have 2 valves per cylinder and the DOHC versions have 4 valves per cylinder; each cam lobe moves only one valve. All RB engines have belt driven cams and a cast iron ...