Parts of four stroke engine

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Peter Mustafa from Freedom Motors says that this design means that it can be 75 per cent smaller and 50 per cent lighter than all other types of motor. The lack of moving parts also means that that the engine is 40 per cent cheaper to make than other engines, according to the manufacturer.

Article: Rotapower engine 'would c...
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Recent tests verified by CARB that the Rotapower engine operating with gasoline produces less than 1% of the emissions of a comparable two-stroke and 14% of those for the four-stroke piston engine.

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It is interesting to note that one complete engine cycle takes two revolutions but that individual valves and spark plugs only operate once in this time. Hence their timing needs to be taken from a half engine speed signal, which is the camshafts speed.

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The four stroke engine was first demonstrated by Nikolaus Otto in 18761, hence it is also known as the Otto cycle. The technically correct term is actually four stroke cycle. The four stroke engine is probably the most common engine type nowadays. It powers almost all cars and trucks.

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Like a piston engine, rotary engines have four phases: intake, compression, combustion and exhaust.

Article: Does a rotary engine have...
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The Rotary uses oil squirters that take small metered amounts of oil and mix it into the fuel to lubricate the seals. Gas mileage is very Mehhhhh at mid 20′s (supposedly….much less in reality.)

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It’s a motor design that utilizes way less moving parts than it’s piston counterpart. The 13B-MSP Renesis (from the RX8) has the highest horsepower per displacement of any naturally aspirated motor produced from the Factory in America.

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The new generation Rotary Engine "RENESIS" makes it superbly environmentally friendly with zero CO2 and almost zero NOx emissions. Mazda began commercial leasing in 2006, and currently many organizations and government bodies are enjoying the RX-8 Hydrogen RE.

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The rotary engine was invented by a German named Felix Wankel in 1957. About 40 years before its invention, 17-year-old Wankel had an improbable dream in the summer of 1919 which led to the idea of the rotary engine.

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