Essay on Six Stroke Engine

895 Words 4 Pages
SIX-STROKE ENGINE
Introduction
The six-stroke engine is an ingenious invention that has the potential to increase engine efficiency by around 30 percent. As fossil fuels are increasingly more expensive to produce and utilize, many have been seeking for answers to these problems. The six-stroke engine seeks to solve some of these problems by exploiting heat that would normally be lost in the four-stroke engine. It does this by utilizing an extra pump to produce more torque and power. In the following graph, the conventional four-stoke is compared to a 6-stroke using a Yamaha TT 500c.
ROAD SPEED MPH 4STROKE RUN TIME SECONDS 100cc FUEL 6STROKE RUN TIME SECONDS
100cc FUEL LOADED RPM
In 5th GEAR % LONGER RUN TIME
30 159 216 2000 35.80%
35 138
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The picture below shows the processes and how it works. Notice that in the fifth stroke, water is injected and then turned into steam for one more rotation and then the exhaust and steam is released together. Matt James, “Gasoline, Steam Engine Hybrid?,” EcoGeek.org, May 15, 2007, http://www.ecogeek.org/component/content/article/664.

Benefits and Concerns As was mentioned before this design seeks to maximize efficiency by utilizing the heat that is lost by the original four-stroke design. With this design, fuel efficiency can increase by up to 30 percent. Not only this, but it also may be so clean that it no longer needs a catalytic converter. Another plus, with the water present and this process, it will naturally cool the engine reducing the need of a radiator. In a semi-truck, the radiator can weigh as much as 1,000 lbs. Reduction of this weight will dramatically increase fuel efficiency, but the weight lost here may be offset by the amount of water that needs to be carried. This is a concern regarding this concept. Some preliminary estimates show that a vehicle may have to carry as much water as it does fuel. This can cause issues because water weighs more than gasoline and this could offset the gains in efficiency because of the heavier load. Although, as the water is used, the total weight will decrease causing short increases in fuel efficiency until the engine is refueled. Since water is present within the engine, a way will need to be

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