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Silencer (silver) and exhaust pipe on a Ducati motorcycle A silencer cut open to show the insulation, chambers and piping inside the shell. A muffler (North American and Australian English) [1] or silencer (British English) is a device for reducing the noise emitted by the exhaust of an internal combustion engine—especially a noise-deadening device forming part of the exhaust system of an ...
A 4-2-1 exhaust system is a type of exhaust manifold for an engine with four cylinders per bank, such as an inline-four engine or a V8 engine. The layout of a 4-2-1 system is as follows: four pipes (primary) come off the cylinder head , and merge into two pipes (secondary), which in turn finally link up to form one collector pipe.
The exhaust then splits into two separate sections of piping, exiting through two 3.75 in (95 mm) stainless steel tips at the rear of the vehicle. The exhaust system is unique in that there is no muffler, instead relying on the turbocharger and resonators to reduce the exhaust volume. The result is a very distinctive and audible exhaust note. [21]
This lower flow but slightly quieter design approach is commonly used in glasspack mufflers. Some modern muffler designs are similar in principle to the glasspack, but use more sophisticated sound-absorbing materials such as stainless steel mesh, and more advanced acoustic engineering, reducing noise while retaining the power-preserving ...
Inertial supercharging effect is the result of incoming fuel/air charge developing momentum greater than intake stroke would generate alone. It is achieved by the careful design of the shape of the piston head, the valves and cam profile/valve timing which creates a vacuum that pulls more exhaust gases (and some of the intake gasses) out of the engine.
The Sennheiser PXC 550-II is one of the highest-scoring headphones in our ratings, with superb sound quality and noise canceling. The PXC 550-II is as much as $300 cheaper than many competitors.
The Veloster Velocity concept is a concept vehicle based on the Veloster 1.6 GDi with customized engine modifications by Cosworth (including performance pistons, rods, turbocharger, intercooler, intake manifold, intake-charging design, fuel system and engine management), custom exhaust system by CPR Fabrication, Sparco A1 WTX 5H Helmets, gloves ...
At subsonic speeds, the airflow constricts the exhaust to a convergent shape. When afterburning is selected and the aircraft speeds up, the two nozzles dilate, which allows the exhaust to form a convergent-divergent shape, speeding the exhaust gasses past Mach 1. More complex engine installations use a tertiary airflow to reduce exit area at ...
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