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Eric Larson
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| Eric Larson is a Lbry.com contributor |
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Gas engines are known as internal combustion engines and are divided into two general classes, specifically two cycle and four cycle engines. A cycle of an engine represents one stroke of the piston or one half revolution of the crank shaft, as a complete revolution represents two cycles. With a two cycle engine, the power impulse occurs at each revolution, while with four cycle engines it occurs at every other revolution, hence the terms two and four cycle engines.
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With gasoline getting more and more expensive, you've probably found yourself wondering what you can do. Even with the rising costs of gas and fuel, you still need it to go places. No matter how you look at it, you are at the mercy of these prices.
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With diesel engines, the compression ratio is higher and there is more power. From a technical point, the compression ratio of an engine is the comparison of the total volume of the cylinder at the bottom of the piston's stroke divided by the volume of the cylinder remaining at the top of the stroke.
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Both diesel cars and light trucks are receiving a lot of attention in the United States as a near term strategy to achieve fuel economy and climate change goals.
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Over the years, the prices of both gas and diesel have experienced some drastic changes. Many years ago, the price of gas was around a dollar or a little more, nothing like it is today. Back then, gas wasn't high in price although the demand for vehicles wasn't what it is today either.
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Diesel engines offer the lowest specific fuel usage of any other large internal combustion engine. The fact remains, two-stroke diesels with high pressure forced induction, particularly turbo charging, make up a large percentage of the largest diesel engines.
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These days, gasoline prices may be crimping your your household budget. You may like to reduce the U.S. dollars that flow to the Middle East for oil, or perhaps you are motivated by your concern for the environment, or even the nagging reality that oil is a depleting resource that shouldn't be wasted.
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If you plan to use your truck like a car, desiring quick, quiet acceleration and rarely ever haul a heavy load and don't plan to it for a long time, you may want a gasoline engine. Gas engines run smoother, fuel is easier to find, and gas engines start easier in cold weather.
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With the ever increasing cost of gasoline prices, auto makers are having to work overtime to cost effictively improve the fuel economy, while still meeting the strict emission requirements of today with gasoline engines.
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When gas is compressed, the temperature of it will rise, with diesel engines using this very property to ignite the fuel. Air is then drawn into the cylinder and compressed by the rising piston at a much high compression ratio than gas engines, up to 25:1, with the air temperature reaching 700 - 900 degrees C.
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142 free articles by Eric Larson
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