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For twin-cam or DOHC engines, VCT was used on either the intake or exhaust camshaft. (Engines that have VCT on both camshafts are now designated as Ti-VCT.↓) The use of variable camshaft timing on the exhaust camshaft is for improved emissions, and vehicles with VCT on the exhaust camshaft do not require exhaust gas recirculation (EGR) as retarding the exhaust cam timing achieves the same ...
The Ford Modular engine is an overhead camshaft (OHC) V8 and V10 gasoline-powered small block engine family introduced by Ford Motor Company in 1990 for the 1991 model year. . The term “modular” applied to the setup of tooling and casting stations in the Windsor and Romeo engine manufacturing plants, not the engine its
When engine speed reaches a certain speed, normally 1500-2000 rpm in the Twin Spark application, the solenoid energises, causing pressurised oil to be directed through the inlet camshaft into the variator. The inlet camshaft position is advanced 25 degrees, thus increasing valve overlap. It remains in this advanced state until about 5000 rpm ...
The compression ratio was increased from 10.0:1 to 10.5:1 on lower output versions; higher output versions such as the 3.5L EcoBoost HO in the F-150 Raptor, have lower compression ratios like 10.0:1 and as low as 9.0:1 in the Ford GT. The camshaft VCT (phaser) design was changed to improve reliability and reduce the development of an 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 ...
In most piston engines, the camshaft(s) are mechanically connected to the crankshaft. The crankshaft drives the camshaft (via a timing belt, timing chain or gears), which in turn actuates the intake and exhaust valves. [1] These valves allow the engine to inhale air (or an air/fuel mixture) and exhale the exhaust gasses. [2]
A 427 Cammer once used by Ford's "X-Garage" skunkworks Ford's 427 cu in/7.0 L Cammer SOHC hemi-head V8 showing cam, rockers and timing chains. The Ford single overhead cam (SOHC) 427 V8 engine, familiarly known as the "Cammer", [25] was released in 1964 in an effort to maintain NASCAR dominance by seeking to counter the enormously large block ...
In 2000, Ford of Brazil developed a cheaper version of the Zetec-S engine with single cam and 8 valves driven by a chain. As a result, this engine exhibits rougher behaviour, producing more vibration and noise. On the other hand, it has a superb torque output thanks to the addition of the Rocam (roller finger camshaft) feature.