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  2. Exhaust system - Wikipedia

    en.wikipedia.org/wiki/Exhaust_system

    When a bus, truck or tractor or excavator has a vertical exhaust pipe (called stacks or pipes behind the cab), sometimes the end is curved, or has a hinged cover flap which the gas flow blows out of the way, to try to prevent foreign objects (including feces from a bird perching on the exhaust pipe when the vehicle is not being used) getting ...

  3. Whistle tip - Wikipedia

    en.wikipedia.org/wiki/Whistle_tip

    Whistle tips, also referred to as whistler tips, or whistlers, are modified vehicle exhaust pipes that generate a whistling sound during the operation of a motor vehicle that can often be heard up to a mile away. [1] The whistle tip is a small metal plate with a central hole that is welded into the inner tip of the exhaust pipe.

  4. Screamer pipe - Wikipedia

    en.wikipedia.org/wiki/Screamer_Pipe

    A screamer pipe is a type of exhaust configuration fitted to some automotive turbocharged petrol engines with an external wastegate set-up, which vents the waste exhaust to the atmosphere through a separate un-muffled pipe, rather than back into the main exhaust track. This exhaust setup is known for its loud noise. [1]

  5. Muffler - Wikipedia

    en.wikipedia.org/wiki/Muffler

    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 ...

  6. Expansion chamber - Wikipedia

    en.wikipedia.org/wiki/Expansion_chamber

    When the descending piston first exposes the exhaust port on the cylinder wall, the exhaust flows out powerfully due to its pressure (without assistance from the expansion chamber) so the diameter/area over the length of the first portion of the pipe is constant or near constant with a divergence of 0 to 2 degrees which preserves wave energy.

  7. How the 173-year-old glassmaker behind Edison’s light bulb ...

    www.aol.com/finance/173-old-glass-maker-behind...

    And they created new ceramic filters to trap smog and exhaust from trucks. Five years later, they got their next big break. In 2007, Apple founder Steve Jobs cold-called Weeks after being ...

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