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The cylinders are lined with cast iron. It uses sequential fuel injection, has 4 valves per cylinder and features fracture-split forged powder metal connecting rods and an assembled cast aluminum intake manifold. The 3.0 L (2,967 cc), 226 hp (169 kW) V6 used in the Mondeo ST220 is called the Duratec ST.
An inlet manifold or intake manifold (in American English) is the part of an internal combustion engine that supplies the fuel/air mixture to the cylinders. [1] The word manifold comes from the Old English word manigfeald (from the Anglo-Saxon manig [many] and feald [repeatedly]) and refers to the multiplying of one (pipe) into many.
A torque-biased variant of the Coyote is produced as an alternative to the EcoBoost V6 in the F-150 pickup truck. The F-150 5.0 L receives a lower compression ratio (10.5:1), intake camshafts with less duration, cast iron exhaust manifolds, and revised cylinder heads to improve cooling. The intake manifold changed only in color, and height.
The graph above shows the intake runner pressure over 720 crank degrees of an engine with a 7-inch (180 mm) intake port/runner running at 4500 rpm, which is its torque peak (close to maximum cylinder filling and BMEP for this engine). The two pressure traces are taken from the valve end (blue) and the runner entrance (red).
Later versions also incorporate a variable length intake manifold (VLIM) and variable valve timing (VVT). Originally debuting as either a 1.0 L (973 cc) straight-3 or 1.2 L (1,199 cc) straight-4; a 1.4 L (1,364 cc) I4 variant was added with the introduction of the second generation, replacing the 1.4 L Family 1 engine.
Ford — Dual-Stage Intake (DSI), on their Duratec 2.5 and 3.0-litre V6s, and it was also found on the Yamaha V6 in the Taurus SHO. The Ford Modular V8 engines and the V6 Cologne use either the Intake Manifold Runner Control (IMRC) for four-valve engines, or the Charge Motion Control Valve (CMCV) for three-valve engines.
The lower-intake manifold also had a reputation for cracking at relatively low miles. The 4.2 L V6's final use was as the base engine in the 2008 F-150; the 2009 and 2010 F-150 was only offered with V8 engines, and starting with the 2011 model year the new 3.7 L Cyclone became the standard engine.
The composite upper intake manifold and cast aluminum lower intake from the L35 engine is also used on the LU3. The LG3 uses a cast aluminum upper intake and a cast iron lower intake. [7] The lower intake eliminated the EGR valve. The LU3 also received a "quiet cam" to help reduce vibration at both idle and high engine speeds.
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