working principles of the six sroke engine in automobiles? A six stroke engine describes a number of different approaches in the internal combustion engine to capture the waste heat from the four stroke Otto 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. As well as extracting power, the additional stroke cools the engine and removes the need for a cooling system making the engine lighter and giving 40% [1] increased efficiency over the Otto 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. The currently notable six stroke engine designs include Crowers six stroke engine, the Bajulaz engine and the Six-stroke engine (Trivandrum). The 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. It does not use any additional working fluid. Six-stroke engine (Trivandrum) In the six-stroke engine developed by the students of College of Engineering, Trivandrum, India, the first four strokes are the same as a four stroke internal combustion engine. After the exhaust stroke, instead of air/fuel mixture (as in case of petrol engines), fresh air is sucked into the cylinder from the air filter, and is removed during the sixth stroke. The valve overlaps have been removed and the additional two strokes have been provided for better scavenging, using air injection. The engine shows 40% reduction in fuel consumption and dramatic reduction in pollution. Its specific power is not less than that of a four-stroke petrol engine. The engine can run on a variety of fuels, ranging from petrol and diesel to LPG. An altered engine shows a 65% reduction in CO pollution when compared with the four stroke engine from which it was developed. The TrivandrumTeam includes Aaron Joseph George, Arun K Nair, Boby Sebastian, and Krishnaraj U. It took them almost two years to develop the engine. A four-stroke Honda engine was experimentally altered to build the new one. Former Honda chief technician Anil CC assisted the project. The idea regarding the modification was proposed and practically implemented by Anil while the students formulated the theories and helped develop the engineering aspects of the IC engine. Its features are:- Reduction in fuel consumption Dramatic reduction in pollution Better scavenging and more extraction of work per cycle Lower working temperature makes it easy to maintain optimum engine temperature level for better performance Less friction, so less 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.
Posted on: Fri, 04 Jul 2014 06:58:06 +0000
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