| Our previous article talks about careful
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| | making these vehicles more
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| planning in order to
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| | attractive.Accessories like
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| save unnecessary trips, adopting
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| | air-conditioning, power steering,
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| carpooling to share out the
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| | windshield
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| costs, avoiding traffic jams at peak
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| | wipers, and others use the energy
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| hours to avoid
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| | generated from the engine.
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| unproductive burning of fuel, avoiding
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| | These use up to 2.2% of the energy.
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| carrying unnecessary
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| | Efforts in developing more
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| loads and other tips that will help in
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| | efficient alternator systems and power
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| some way or another to
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| | steering pumps can
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| save on fuel consumption.I did touch a
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| | improve the fuel economy by up to
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| bit on more efficient smaller cars that
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| | 1%.Driveline losses can account for up to
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| are
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| | 5.6% of the total. The
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| lighter and do not have to carry excess
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| | energy is lost through the transmission
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| and unproductive weights
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| | and other parts of the
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| in their frames, chassis and body.
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| | driveline. To reduce these, technologies
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| However, very often, these
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| | such as automatic
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| smaller and lighter cars are not as
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| | manual transmission (AMT) and
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| comfortable to ride compared
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| | continuously variable transmission
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| to the heavier ones.So, in this article,
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| | (CVT) has been developed.Next comes the
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| I won't compare lighter cars with heavier
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| | shape of the vehicle. Aerodynamic drag
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|
| |
| | accounts
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| cars. I will explore with you the kinds
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| | for 2.6% of the energy losses. As the
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| of efficiency losses
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| | speed of a vehicle
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| that are quite typical even within the
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| | increases, the drag caused by expending
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| same class of cars.If you look through
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| | energy to push air out
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| the sales brochures of new cars, very
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| | of the way increases. By designing the
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| often
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| | shape of a vehicle for
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| you can find figures that indicate the
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| | smoother air flow, significant drag
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| fuel efficiency of the
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| | reduction can be achieved.Rolling
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| car. With that information, you can
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| | resistance is another loss encountered in
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| compare and find out the
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| | a vehicle. It
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| most fuel efficient vehicle that will
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| | accounts for 4.2% of the losses. This
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| meet your needs. Even
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| | rolling resistance is a
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| within a specific size class, there is a
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| | measure of the force necessary to move
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| tremendous range of
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| | the tire forward. To
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| MPG (miles per gallon) performance that
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| | counter this, tires technologies like
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| you can find.Just for example, for the
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| | thread and shoulder
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| same model year compact cars, we can
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| | designs, and the use of improved
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| find fuel efficiency ranges from 21 to
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| | materials on the tire belt and
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| 48 MPG. If you choose
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| | traction surfaces are being
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| the 48 MPG car, you could be saving
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| | developed.For passenger cars, a 5~7%
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| hundreds of dollars in fuel
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| | reduction in rolling resistance
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| costs each year. I think that should be
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| | increases fuel efficiency by 1%.
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| an important point to
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| | However, these improvements
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| note when buying a new car.Having
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| | must be balanced against traction,
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| decided on the model that fulfils your
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| | durability and noise.Related to the
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| needs, you might
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| | driver's behavior is braking loss. This
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| be interested to know where the energy
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| | can
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| goes.Idling losses could account for as
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| | account for as much as 5.8%. Each time a
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| much as 17.2% of all the
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| | vehicle moves forward,
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| losses. In urban driving, this much of
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| | the vehicle's drivetrain must provide
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| energy is lost to idling
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| | enough energy to overcome
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| at stop lights or in the traffic. There
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| | the vehicle's inertia. This inertia is
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| are technologies
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| | directly related to the
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| available such as integrated starter /
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| | weight of the vehicle. So for lighter
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| generator (ISG) systems
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| | vehicles, less energy is
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| that help to reduce this type of losses.
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| | expended to overcome the inertia of the
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| It does this by
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| | vehicle compared to a
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| automatically turning off the engine
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| | heavier vehicle. The less a driver
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| when a vehicle comes to a
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| | brakes, the less energy is
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| stop and restarting it instantly when
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| | expended to move the vehicle again.As
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| the accelerator is pressed.Another very
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| | you can see, there are many factors that
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| significant loss is through the engine
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| | can affect the fuel
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| itself. The
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| | efficiency even of similar vehicles.
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| internal combustion engine of
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| | Factors like the vehicle
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| gasoline-powered vehicles is very
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| | condition, tire pressures and design,
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| inefficient. Over 62.4% of the fuel's
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| | driver's habit, planning
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| energy is lost through the
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| | trips, reducing excess loads, avoiding
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| engine combustion process of converting
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| | drag, idling at peak
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| the fuel's chemical
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| | traffic and many others can affect the
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| energy to mechanical energy. Energy is
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| | efficiency.With a better understanding of
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| lost to engine friction,
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| | the measures you can control, you
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| pumping of air into and out of the
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| | should be able to achieve the best
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| engine, and removing the
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| | optimum efficiency in your
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| wasted heat.Advanced engine technologies
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| | vehicle and save money in the
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| have been developed to address
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| | process.Thomas Yoon specializes in
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| these losses. Some of them are: variable
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| | cartoon
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| valve timing and lift,
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| | illustrations that will make an impact
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| turbocharging, direct fuel injection,
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| | on people's opinions.
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| and cylinder deactivation.Diesel engines
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| | Subscribe to engineering facworld ezine.
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| are about 30~35% more efficient than
| |
| |
|
| gasoline
| |
| | More information on engineering at
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| engines. New advances in diesel
| |
| | Marine
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| technologies and fuels are
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| | and M & E Engineer.
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