Berkeley CSUA MOTD:Entry 48887
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2008/1/4-5 [Health/Women] UID:48887 Activity:nil
1/4     Six stroke engines: http://en.wikipedia.org/wiki/Six_stroke_engine
        It says "40% increased efficiency over the Otto Cycle or Diesel Cycle."
        How come we don't see these engines in new cars?  It'll be cool if we
        can have a six-stroke (bio)diesel solar-plug-in hybrid car.
2024/12/24 [General] UID:1000 Activity:popular
12/24   

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en.wikipedia.org/wiki/Six_stroke_engine
Diesel cycle and use it to power an additional power and exhaust stroke of the piston. Designs either use steam or air as the working fluid for the additional power stroke. increased efficiency over the Otto Cycle or Diesel Cycle. The pistons in a six stroke engine go up and down six times for each injection of fuel. The six stroke engine has 2 power strokes, one fuel, one steam or air. Beare Head engine is called a six stroke by its designer but stands apart from the others. It uses a second opposed piston in each cylinder which moves at half the cyclical rate of the main piston, thus giving six piston movements per cycle. The high pressure achieved is then released into the cylinder to work the power stroke. Meanwhile a second chamber which blankets the combustion chamber has had its air contents heated to a high degree by heat passing through the walls from the burn. This heated and pressurized air is then used to power another stroke of the piston in the cylinder. wear and tear * The six-stroke engine does not require any basic modification to the existing engines. All technological experience and production methods remain unaltered. The Engineering students have been awarded the 'Indian Society for Technical Education - National awarded' for Best B Tech project of 2006. edit Beare Head The term "Six Stroke" was coined by the inventor of the Beare Head, Malcolm Beare. The technology combines a four stroke engine bottom end with an opposed piston in the head working at half the cyclical rate of the bottom piston. The head piston works in a ported cylinder closely resembling that of a two stroke, thus 4+2= Six Stroke. edit Related US Patents 1217788 Internal combustion and steam engine Feb 27, 1917. Hugo F Liedtke seems to be one of the first to contemplate alternating between internal combustion and steam injection into the combustion chamber. Leonard H Dyer invented the first 6-stroke internal combustion/water-injection engine in 1915.