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With traditional fixed valve timing, an engine will have a period of "valve overlap" at the end of the exhaust stroke, when both the intake and exhaust valves are open. The intake valve is opened before the exhaust gases have completely left the cylinder, and their considerable velocity assists in drawing in the fresh charge.
A camless or free-valve piston engine is an engine that has poppet valves operated by means of electromagnetic, hydraulic, or pneumatic [1] actuators instead of conventional cams. Actuators can be used to both open and close valves, or to open valves closed by springs or other means.
The 7.3 L DI Power Stroke was in production until the first quarter of model year 2003, when it was replaced by the 6.0 L. Nearly 2 million 7.3 L DI Power Stroke engines were produced in International's Indianapolis plant. [8] The 7.3 L DI Power Stroke engine is commonly referred to as one of the best engines that International produced. [6] [7]
VCT on the intake camshaft is used primarily for increasing engine power and torque as the PCM is able to optimize the opening of the intake valves to match the engine conditions. [2] VCT is used in Ford's Triton 5.4L 3-valve V8 engine, the Australian Barra 182 and 240 Inline-6s, and Ford's 4.6L 3-valve V8 engine used in the 2006-2010 Ford ...
The Ford Super Duty (also known as the Ford F-Series Super Duty) is a series of heavy-duty pickup trucks produced by the Ford Motor Company since the 1999 model year. Slotted above the consumer-oriented Ford F-150, the Super Duty trucks are an expansion of the Ford F-Series range, from F-250 to the F-600.
2004–2011;The 2.5 Duratec is an inline 5 engine used in the Ford Focus ST225,Kuga,S-Max ST and various Volvo T5 models.It features DOHC, 20 valves and Ti-VCT.It displaces 2521cc and produces 166 kW (225hp) and 320 N.m (236lb.ft) in the ST or 227 kW (305hp) and 440 N.m (324.5lb.ft) in the Focus RS, or even up to 257kW (345hp) and 460 N.m ...
Instead, a big push came from food (up 0.4%) and energy prices, which rose 0.2% and posted the category’s first increase in six months. New and used cars also saw price increases of 0.6% and 2% ...
For the first time, a diesel engine was offered in the F-150, as a 250 hp 3.0L Power Stroke V6 was introduced during the model year, dependent on trim (commercial and fleet sales only, for XL and XLT trim). For 2019, the 450 hp version of the 3.5L engine was introduced to the flagship Limited trim.