Diesel-Vs-Gasoline-Vehicles Articles

Diesel Fuel Quality

(category: Diesel-VS-Gasoline-Vehicles, Word count: 450)
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The designs of diesel engines striving to increase

performance have made a lot of advancements in engine

fuel delivery to the combustion chamber. The diesel

engines of today are much quieter, smoother, and

also more powerful. The quality of diesel fuel on

the other hand has not advanced at the same rate as

the improvements of engines.

As soon as it is produced, diesel fuel begins to

deteriorate. Less than 30 days of refining, all

diesel fuel, regardless of the brand, goes through a

natural process called oxidation. This process forms

varnishes and gums in the fuel by causing the

molecules of the fuel to lengthen and start bonding

together.

Now, these components will drop to the bottom of the

fuel tank and form diesel sludge. The fuel will

begin to turn very dark in color, smell bad, and

cause the engine to smoke. The engine starts to

smoke as some of these clusters are small enough to

pass through the engine filtration and on to the

combustion chamber.

As the clusters begin to increase in size, only a

small amount of the molecules will get burned, as

the rest will go out the exhaust as unburned fuel

and smoke.

Its estimated that eight out of every ten diesel

engine failures are directly related to poor quality

and contaminated fuel. The build up of contamination

in the fuel systems and storage tanks can clog

filters, thereby causing the engine to shut down,

and damage to the engine to occur.

The number one reason for bad fuel is due to the

increasing popularity of diesel power and the

accompanying increased demand for more diesel fuel.

Long ago, diesel fuel remained in the refinery

storage tanks long enough to naturally seperate and

begin to settle, allowing the clean fuel to be

drawn apart. Now, with the demand getting higher

than ever, the fuel is never stationary long enough

to settle, and the suspended water and solids are

passed on to the person buying the fuel - you.

The changes in refinery techniques is also a

problem. In order to get more products, diesel

fuel is being refined for more marginal portions of

the crude barrel. This results in a lower grade

product that is thicker and also contains a lot

more contamination.

As time continues to pass and technology gets better

and better, one can only hope that the quality of

diesel fuel improves. As it stands now, the quality

isn't good at all. If you run diesel fuel, all

you can basically hope for is that the fuel you

are getting isn't contaminated.

How Diesel Engines Work

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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.

At the top of the piston stroke, the diesel fuel is

injected into the combustion chamber at high pressure,

then through an atomizing nozzle, it mixes with the

hot high pressured air. The resulting mixture will

ignite and burn very rapidly. This combustion will

cause the gas in the chamber to heat up rapidly,

which increases the pressure and forces the piston

downwards.

The connecting rod will transmit this motion to the

crankshaft. The scavenging of the engine is either

done by ports or valves. To get the most out of

a diesel engine, use of a turbocharger to compress

the intake of air is vital. You can also use an

aftercooler or intercooler to cool the intake air

after compression by the turbocharger to further

increase your efficiency.

An important part of older diesel engines was the

govenor, which limited the speed of the engine by

controlling the rate of fuel that was delivered.

Unlike gas engines, the air that comes in is not

throttled, so the engine would overspeed if this

wasn't done. Older style injection systems were

driven by a gear system that came from the engine.

The diesel engine is truly an advancement to vehicles

as we know it. As technology gets better, you

can expect the diesel engine to get better as well,

possibly even proving just how much better it is

to the gasoline engine.

Gas Saving Tips

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Are you tired of the continuing rise in gasoline price?

If you are, you're not alone. In this article, you'll

find a few excellent tips designed to help you save

a bit of your hard earned money.

First, its always best to purchase your gas either

first thing in the morning or late at night. The

reason for this is because gas is denser at a cold

temperature, so you'll basically be getting more for

your money.

Secondly, check your local gas prices to find the

best price available. You can check your local gas

prices online as well, which will prevent you from

wasting gas while driving around to look for the

best price.

By keeping your car well maintained, you can help

improve fuel consumption. By simply tuning your car,

you can decrease your fuel consumption by up to 20

percent. Also, you should keep your tires properly

inflated and aligned. Tires that are under inflated

will cause fuel consumption to increase by 6 percent.

You should also make sure that you change your oil

and air filters on a regular basis as well.

Other tips to keep in mind are to drive by staying

in the posted speed limits, as the faster you drive

you will use more fuel. Whenever possible you should

use overdrive, as this will help fuel and also

improve the wear on your engine. You can also

combine your errands by making a list of things that

you have to do, as the more you cold start your

engine, the more fuel you'll be using.

By taking the time to do these tips, you'll be

amazed at just how much fuel you can save. Gas

prices are becoming ridiculous these days, which

is why you want to do your part to converse little

drop that you can.

Diesel Vehicles

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As you probably already know, diesel engines get

better fuel economy than gas, simply because they

don't need to burn as much fuel as gasoline engines

to get the same amount of power. Diesel engines

are built heavier than gas engines, to help sustain

the added stress of the much higher compression

ratios.

Diesel engines don't have an ignition system either,

so you'll never have to tune them up. The exhaust

systems will last longer as well, as the exhaust

on a diesel isn't as corrosive as an exhaust on a

gasoline engine.

With diesel engines, it isn't unusual to see them

with 400,000 or even 500,000 miles. There are some

out there that have even went beyond 600,000 miles!

When it comes to maintenance, 3,000 mile oil changes

are a must. Diesel fuel isn't as refined as gas,

so the oil will get dirtier faster. You should

also replace the air and fuel filters at least

once a year.

If you live in a colder climate, you'll need to

switch to a winter blend of fuel to prevent fuel

gelling. There are several additives that you can

put in the fuel as well, to help prevent your fuel

from getting gel.

It's also recommended that you replace the glow

plugs every two years. If the temperature drops

below 10 degrees, a block heater is something you

should have. This will ensure starting in cold

weather, especially with the heavy grade of oil

that a diesel engine requires.

If you take care of your diesel vehicle, you can

count on it to be around for years to come. Unlike

gas vehicles, diesel engines are built for the

long haul, and will last you for miles and miles

if you take care of them.

Why People Use Diesel

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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.

Gasoline ratios

Serious damage to gas engines can occur if you attempt

to run a high compression ratio with a low octane type

of fuel. Detonation is the ignition of the fuel due

to the high temperature caused by a high compression

ratio that is developed by design. The fuel is

ignited prior to the spark of the plugs that result

in a rapid, yet uncontrolled burning.

Diesel ratios

Keep in mind, the diesel is a heat engine, using heat

developed from the compression of air. High compression

ratios are possible since the air is compressed. The

hot compressed air is sufficient to ignite the diesel

fuel when it's finally injected near the top of the

compression stroke.

Diesel engines

Fuel and air in the design of diesel engines are not

premixed outside of the cylinder. Air is taken into

the cylinder through the intake valve and then

compressed to make heat. The diesel fuel is injected

near the top of the piston's stroke in an amount or

ratio that corresponds to the load on the engine.

Heavy duty

The higher compression ratio causes engineers to

design, and test the block, heads, head bolts,

crackshaft, connecting rods, rod bolts, pistons,

piston pins, etc., with a greater range of structural

capacity. To put it in other terms, diesels are

heavier than gasoline engines.

Gasoline

Deciding on gas and diesel can be tough, although

there are several reasons why you should use diesel.

1. Diesel engines produce twice the power

per gallon of fuel than gasoline.

2. A gallon of diesel is normally cheaper

than a gallon of gas.

3. Diesel fuel doesn't blow up. The fact

is, its hard to get diesel to burn at all.

4. Diesel engines will last four times

longer than gasoline engines.

5. Diesel fuel that is untreated will last

longer in storage than untreated gasoline.

6. Treated diesel fuel will last longer in

storage than treated gasoline.

7. Diesel fuel treatment will cost less

than gas treatment.

8. Spoiled diesel can be reconditioned to

refinery specifications, as spoiled gas can't.

9. Unmodified diesel engines can be ran on

vegetable oil.

Diesel Engines Forgotten Treasures

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There are very few engine configurations that promise

increased fuel economy and power. There are few

engines that offer this in addition to reliability.

Today, those across the ocean are enjoying the

fruits of diesel technology revolution.

Diesels have experienced a great history here in the

United States. In 1980, General Motors modified

their 350ci gas V8 to run on diesel fuel. The result

however, wasn't that god. These engines offered

better fuel economy but little else. They were

very slow, and not very reliable.

Mercedes Benz on the other hand, had better luck

in the 1980s with an array of vehicles available

with diesel engines. These great vehicles offered

amazing durability although they were rough, noisy,

and smoked quite a bit. Volkswagon offered diesel

as well, although they had a habit for spewing

blue smoke from the tail pipe.

Throughout the 90s, Benz and Volkwagon offered

diesel vehicles in the United States, with each

generation becoming cleaner, smoother, and more

powerful than the last. Overall, they were a

tough sell as they still lacked the horsepower

that many were seeking.

Today, Mercedes, BMW, Jaguar, Volkswagon, Ford,

and many other manufacturers are offering diesels

to many markets throughout the world. To put it

simple, forget everything you know or think you

know about diesel engines in the United States.

These newer engines benefit from hundreds of

technical innovations. There are several diesels

in Europe that offer better acceleration than

their gasoline counter parts. BMW's 120d has

163bhp, goes 0 - 60 in under 8 seconds, and

achieves 49.6 miles per gallon.

Benz offers the C320 CDI SE that has 224bhp, and

over 360 lb foot of torque. This car gets just

under 48 mpg on the highway, with an acceleration

of 0 - 60 in under 7 seconds. Throughout North

America, you won't find a gasoline engine that

offers this unique blend of fuel economy and

excellent performance.

The reason why diesels haven't caught on in

North America comes down to one word - sulfur. We

have too much sulfur in the diesel here in the

United States. This cheap grade of diesel fuel

will run havoc on the more sophisticated diesels

offered overseas and cause an increase in

emissions.

There is hope however, as refiners will soon be

producing what is known as ultra low sulfur

diesel fuel. This will help to reduce the sulfur

content from 500ppm to 15ppm.

Diesel Or Not

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Diesel is often looked at as being smelly, noisy, and

many think the only place for it is in a tractor. The

truth to diesel vehicles is that they are slow, noisy,

smelly, although they are cheaper to run than gas.

Diesel engines aren't as powerful as gas engines, as

gas engines produce more horsepower than that of a

diesel engine. Diesel vehicles however, offer more

torque than gas. Therefore, it is a very thin line as

to which one is better.

When it comes to power, diesel is the more expensive

of the two. Diesel powered vehicles are normally more

expensive to buy than gas, and the parts are a lot

more expensive than gas vehicles. The diesel however,

is more reliable due to it being less complicated

internally and heavier to build, therefore it normally

lasts longer than gas engines.

Economy is always a factor as well, as will fuel

prices being what they are. Now days, it costs a

small fortune to fill up a gasoline vehicle, especially

the bigger engines. When it comes to fuel, diesel

is generally less expensive. You can fill up a diesel

vehicle for less of a price, and the fuel will

normally go longer than gas will.

Appearance is also important. Diesel is generally

loud, with the exhaust emitting black smoke when the

vehicle is throttled. You can normally tell when a

diesel pulls off by the black smoke it leaves behind.

Keep in mind, this isn't a problem with the engine,

just means that the fuel is dirtier.

Tuning is also important. Gas engines are more

tunable than diesel, as you can get better power

increases from gas than you can with diesel. The

major thing diesel owners tend to go for is turbo,

as it is one sure way to match gasoline in terms

of power.

A turbo charged diesel can and will match a standard

gasoline engine for power, if not slightly better it

a bit. This is why most diesel cars come turbo

charged, as its a way to keep up with the modern

diesel engines of today.

When it comes to making the choice, you really have

to choose what is best for you and your needs. If

you want power with plenty of tuning options, then

gasoline engines are what you want. On the other

hand, if you want power and torque, then a diesel

vehicle is what you want.

The choices are entirely up to you, as there are

certainly plenty to choose from. Always check out

the vehicle you are interested in, and find out

if it will match your needs. Before you know it,

you'll have a diesel or gas vehicle that will perform

well beyond your expectations.

Industrial Diesel Engines

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Industrial diesel engines are any engines that are used

for industrial purposes that run on diesel. Industrial

diesel engines are used to power a major portion of

industrial machinery, from motorbikes to bulldozers,

generators, and even forklifts and trucks. They range

in size from a few pounds to a few tons, with a various

amount of power.

The use of diesel engines is mandated by several large

organizations. All NATO machinery for example, runs on

either diesel or aviation grade kerosene. At the

current level of technology, fossil fuels, and especially

diesel are the most economical and convenient means

of supplying power to a variety of equipment and

even backup generators.

All industrial diesel engines can be either air cooled

or water cooled. The smallest engines for residential

purposes will typically provide about 10kW and cost

a few thousand USD. These smaller scale engines power

much of the mobile machinery we see around us on a

daily basis, such as trucks, farm equipment, small

boats, stationary process machinery, earth movers,

and so on.

The medium scale industrial diesel engines can provide

levels between a few hundred kW and a few thousand

kW and are sold for prices in usually the thousands

of dollars. These types are used in larger machinery

such as larger mining equipment, oil rigs, trains,

large boats, military equipment, and much more.

The largest of industrial diesel engines provide 10,000

to 80,000 kW, sold in the millions of dollars, and

are used for ultra heavy equipment, electric power

generation, and the largest of ships. Large industrial

engines can be up to 49 feet side and run on low

grade diesels. In places such as China, where there

is a high demand for de-centralized power sources,

these types of engines are often utilized.

Industral engines are classified in terms of their

speed, or RPM (Rotations Per Minute). High RPM

engines are normally used for the lighter, more common

applications, such as trucks and other types of land

equipment.

Medium RPM engines are generally used for power

generation. Low RPM ranges, and high torque engines

are used for the biggest type of equipment, such as

marine equipment and applications.

For the most part, industrial diesel engines can

vary in terms of size and performance. Chances are,

you've either seen or used industrial equipment at

some point in time. Although they cost a lot of

money, they are the way to go with bigger equipment

for getting the job done right the first time.

Diesel Versus Gasoline

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A diesel engine will go much farther on a gallon

of fuel that the standard gasoline engine

because of their designs, and due to the higher

energy density of a gallon of diesel fuel. But,

it also takes a bit more oil to manufacture a

gallon of diesel than a gallon of gas, with

the production and refining processes for

diesel producing more gases that trap heat.

Therefore, when you consider the relative merits

of deisel and gas cars, try knocking the MPG

estimates for the diesel car down by 20 percent.

A diesel vehicle will cost you a bit more,

so you'll get more bang for your buck from a

gasoline vehicle.

The nasty rumors you hear about diesel are

true as well - diesel is less refined than gas,

or in other terms it's dirtier. Diesel

vehicles also emit more particulate matter and

NOx, both of which are serious health hazards

and air pollutants. Current diesel engines are

more polluting per each mile they are driven

than gas engines.

Using biodiesel on the other hand, will improve

this situation. If biodiesel is available in

your area, you'll still need to examine

whether a diesel is the right vehicle for you.

When you consider the facts, you have to ask

yourself which models you can afford, what is

the MPG, will engine be succifient for you,

and the number of passengers the vehicle will

accommodate. Then, given your budget, you can

go from there.

There are numerous gas and diesel vehicles

available, all you have to do is decide which

one is right for you. If you research carefully,

you'll have the perfect vehicle for your entire

family.

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