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When the transfer is complete, the piston is on the compression stroke but the exhaust port is still open, an unavoidable problem with the two stroke piston port design. To help prevent the piston pushing fresh mixture out the open exhaust port the strong acoustic wave (produced by the combustion) from the expansion chamber is timed to arrive ...
A typical exhaust system. The parts' names translate as follows: Krümmer: manifold (in this case, the exhaust manifold); Hosenrohr: downpipe; Katalysator: catalytic converter; Mittelschalldämpfer: middle silencer (or center muffler); Vorschalldämpfer: front silencer (or pre-muffler); Nachschalldämpfer: rear silencer (or main muffler); Endrohr: tailpipe.
This method requires that the exhaust pipe is long enough to contain the gas slug for the entire duration of the stroke. As the Crossley engine was so slow-revving, this resulted in an exhaust pipe with a length of 65 feet (20 m) between the engine and its cast-iron 'pot' silencer. [2]
A stroke is the action of a piston travelling the full length of its cylinder.In a two-stroke engine, one of the two strokes combines primarily the intake stroke and the combustion stroke, while the other stroke primarily combines the compression stroke and the exhaust stroke, though technically since both ports are exposed during both the combustion and compression strokes, some reversion ...
To satisfy the demand for larger carburettors the 1000 series was introduced in 1970 with bore sizes of 34, 36 and 38mm. [ 23 ] The British motorcycle industry was in decline and with the lack of orders for OEM carburettors, production was limited after 1975 for replacement and aftermarket sales.
Cylinder and ports, viewed from above. Schnuerle porting [1] [2] is a system to improve efficiency of a valveless two-stroke engine by giving better scavenging.The intake and exhaust ports cut in the cylinder wall are shaped to give a more efficient transfer of intake and exhaust gases.
The PBS-1 silencer, designed for use with the AKM to reduce the noise when firing, was introduced in the 1960s, and was used mostly by Spetsnaz forces and the KGB. [3] [4] [5] They were used by the Spetsnaz in the Soviet–Afghan War in the 1980s, requiring the use of the AKM (modernized variant of the AK-47), because the newer AK-74 did not have a silencer available. [6]
Gemtech (stylized as GEMTECH) is an American manufacturer of silencers (suppressors) for pistols, rifles, submachine guns, and personal defense weapons (PDWs). The company also produces ammunition and various accessories. [2] [3] [4] Gemtech was founded in 1993 and is headquartered in Eagle, Idaho.