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The two-stage valve-lift function is performed by electro-hydraulically operated switchable tappets. Each of these 12 tappets consists of concentric lifters which can be locked together by means of a pin. The inner lifter is actuated by a small cam lobe, while the outer ring element is moved by a pair of larger-profile lobes.
The Red Army adopted the V-2 engine in the same year in three modifications: the V-2 (500 hp (370 kW)), the V-2K (600 hp (450 kW)) for the KV line of tanks and the V-2V (375 hp (280 kW)). [ 1 ] Near the end of the 20th century, the V-2 was fitted with more modern modifications by the chief designer of the head design bureau for the Chelyabinsk ...
AN/TRC-87 V-280 trailer: 2-axle: maintenance: AN/MSQ-35 V-287 trailer: 2-axle ... List of U.S. military vehicles by model number; List of military electronics of the ...
The Model V was among the early [2] electromechanical [3] general purpose computers, [4] [5] [6] designed by George Stibitz and built by Bell Telephone Laboratories, operational in 1946. Only two machines were built: first one was installed at National Advisory Committee for Aeronautics (NACA, later NASA), the second (1947) at the US Army’s ...
The cam can be seen as a device that converts rotational motion to reciprocating (or sometimes oscillating) motion. [clarification needed] [3] A common example is the camshaft of an automobile, which takes the rotary motion of the engine and converts it into the reciprocating motion necessary to operate the intake and exhaust valves of the cylinders.
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 ...
It is maintained by the model developers and distributed by TRC. The model has been adopted by the United States Environmental Protection Agency (EPA) in its Guideline on Air Quality Models [2] as a preferred model for assessing long range transport of pollutants and their impacts on Federal Class I areas and on a case-by-case basis for certain ...
The V-model is a graphical representation of a systems development lifecycle.It is used to produce rigorous development lifecycle models and project management models. The V-model falls into three broad categories, the German V-Modell, a general testing model, and the US government standard.