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
Both classes have their own specific advantages and
uses. For autombiles, the four cycle engines is
most used. For motor boats on the other hand, the
two cycle engine is most often used.
The horse power of gas engines is designated as HP
and also brake test HP. The IHP is the theoretical
HP, which is found by figuring different formulas,
in which the diameter of the bore, length of the
stroke in inches, and number of revolutions per
minute form the basis for calculation. The results
are found by the use of such formulas.
The BTHP on the other hand, is the power the engine
actually develops in service, and is considerably
less than the IHP. Keep in mind, this depends upon
the degree of the mechanical perfection attained in
the construction of the same. If both the compression
and construction are good, the engine may actually
reach 80 - 88% of the intended IHP.
With gasoline engines, high HP and high RPM ranges
are what makes them popular. Gas engines have always
been more popular than diesel vehicles, for the simple
fact that they can achieve more speed. If speed
is what you are after, gasoline vehicles are what
you should be looking for. Although they may lack
in torque and raw power, they make up for it with
speed and tuning options.
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Diesel Or Not
Advantages Of Diesel Engines
If you've owned a diesel powered vehicle in the past or if you own one now, you no doubt appreciate the qualities this engine provides you with. More torque, better fuel economy, and easier maintenance are but a few of the attributes of...
Diesel And Gas Prices
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...
Gas Diesel Hybrid War
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...
Gas Trucks Versus Diesel Trucks
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...
Gas VS Diesel Boats
As you may know, diesel engines aren't something you should take lightly. There are good reasons why the rush to put them in cars back in the 70s flopped. Diesel isn't the ideal power source for all applications. Engine speed ...
General Information On Diesel Engines
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...
How Diesel Engines Work
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...
Hydrogen Boosted Gas Engines
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. One ideal and...
Why People Use Diesel
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...
Why You Should Choose Diesel
The major distinction between diesel and gas lies in the type of ignition. While gas engines operate on spark ignition, diesel engines employ compression ignition for igniting the fuel. With compression, the air is drawn into the engine...
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