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Joseph Day (1855 – 1946) is a little-known [1] English engineer who developed the extremely widely used crankcase-compression two-stroke petrol engine, [1] [2] as used for small engines from lawnmowers to mopeds and small motorcycles.
The crankcase-scavenged engine, employing the area below the piston as a charging pump, is generally credited to Englishman Joseph Day. [ 3 ] [ 4 ] On 31 December 1879, German inventor Karl Benz produced a two-stroke gas engine, for which he received a patent in 1880 in Germany.
[2] [3] The crucial simplification of the concept, that made possible small yet powerful two-stroke engines for mass markets, was patented by Joseph Day [3] in 1894. [2] Joseph Day, design of a three-port [9] two-stroke engine; Nash, design of a two-port [9] two-stroke engine; Robson, design of a two-stroke engine with under-piston [9] scavenge
Joe Day (footballer) (born 1990), English football goalkeeper; Joseph Day (inventor) (1855–1946), inventor of the modern two-stroke engine; Joseph A. Day (born 1945), Canadian senator; Joseph P. Day (1874–1944), American real estate entrepreneur; Joseph Day (Massachusetts politician), representative to the Great and General Court
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1886: Prototype hot bulb engine or heavy oil engine built by Herbert Akroyd Stuart (1864–1927). 1889: Two-stroke engine invented by Joseph Day (1855–1946). 1890: Opening of the Forth Bridge – monumental cantilever railway bridge, and icon of Scotland – designed and engineered by English civil engineers Benjamin Baker (1840–1907) and ...
The engine compressed the air/fuel mixture before combustion, unlike the other atmospheric engines of the time. The engine was a single-cylinder unit that displaced 6.1 dm 3, and was rated 3 PS (2,206 W) at 180/min, with a fuel consumption of 0.95 m 3 /PSh (1.29 m 3 /kWh).
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