Unit 9 Lesson 35 Clean Machines

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Unit 9 Lesson 35 Clean Machines
Is your car clean?
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What is most important, if you live in a big
modern city? Many would answer the car. You will
find it difficult to go to work or move without
a car. More and more families have their own cars
in order to make life more convenient, but have
you ever thought about what would happen to the
city?
The more, the better?
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Test your knowledge about cars.
Name Type Style Energy Advantages Disadvantages

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Are you interested in cars? If so, how many
different types of cars have you seen or you know
about? Talk about cars in your group.
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Talk about the car you know best in your
group. The following questions and the key words
in Exercise 2 are for your reference.

1. What type of car are you going to talk about?
2. What do you think is the most important to a car?
3. What are the main kinds of fuel used for cars?
4. Is the fuel used for the car you are talking
   about favorable?
5. Whats the problem with the fuel now?

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Have you got any idea to improve a car? Speak
it out and share it with your friends.
Name of the car Conditions Problems Your idea Your friends idea

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Look at the following picture. Whats it?
A solar car
Have you ever heard of a solar car? Read the
interview. Maybe you will find something special.
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Read the interview to learn about the solar car
racing and remember to collect information.
Questions/Problems Answers/Solutions
1 What is a solar car?
2 Solar cars are clean and safe.
3 When did Marie Logan begin to design solar cars?
4 Six.
A car which uses suns energy for power.
Why are people interested in solar cars?
At university.
How many races has Marie Logan taken part in?
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Questions/Problems Answers/Solutions
5 Where did the race Marie liked best take place?
6 It did in four days
7 What has Marie been doing recently?
8 What else has Marie been doing?
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It ran across the whole of Australia from North
to South.
How long did the race take?
Building a new car with a team from Queensland
University.
Writing a book about solar cars
Whats the main problem with solar cars?
They are too slow or unreliable.
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What do you think of the solar racing car? Would
you like to have a try to design one of your own?
Improve your former design.
Name of your car Type Former design ( Problem) New design ( Improvement) Reason for improvement

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Describe your design of a new car to your friends
and listen to their suggestions.
Name Opinion Opinion Suggestions Suggestions
Name Good Problem How to Reason



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Extensive Reading
If you are really interested in solar car
racing, read more about solar car racing.
What is a solar car?
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A solar car is a light weight, low power
vehicle designed and built with a single purpose
in mind - racing (or "raycing", a combination of
"race" and "ray" from the sun).
Solar Car
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Similar to an Indy or Formula One race cars,
solar cars do not represent a practical means of
transportation. They have limited seating
(usually one, sometimes two people), they have
very little cargo capacity, and they can only be
driven during the day. They do, however, offer an
excellent opportunity to develop future
technologies that can be applied to practical
applications.
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Read to learn about solar car racing.
Solar vehicles representing five college teams
left Cal State- Sacramento on Tuesday morning at
the start of a six-day, 670-mile race to Los
Angeles. They reached Stanford via Vallejo, the
San Francisco- Oakland Bay Bridge, a foggy San
Francisco and Highway 280.
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Solar car races were led across the first-day
finish line by the Western Washington
University's Viking XX, a sleek car under a
slanted array of solar cells like a roof of shiny
blue tile. The Viking, which reached Stanford
with an elapsed driving time of 4 hours, 27
minutes, placed fifth internationally in the
World Solar Challenge in Australia last November.

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The cars are powered by the sun, but the race
itself is powered by the organization and
dedication of college students. It started with
the Stanford Solar Car Project, a loose
collection of 40 or so students who have so far
built two solar cars with a little faculty advice
and a lot of hard work. Graduate student Dave
Caditz spearheaded the idea of a race that would
zig-zag across California and inspire the
public's interest in alternative-powered
vehicles.
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The American Solar Challenge
The American Solar Challenge (ASC) is a
competition to design, build and rayce
solar-powered cars in a cross-country event.
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In 2005 there will be a special edition of
ASC, the 2005 North American Solar Challenge.
Teams will compete in a solar vehicle rayce from
United States through Canada!
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How to Design a Solar Car
If you are interested in solar car racing,
please read the following to learn how to design
a solar car.
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Designing and Building a Solar Car
Read and learn how to make a solar car.
Designing and building a solar car is an enormous
project that can take up to two years to
complete.
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Energy Flow for a Solar Car
Energy flow diagram for a solar car
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The sunlight hits the cells of the solar
array, which produces an electrical current. The
energy (current) can travel to the batteries for
storage, go directly to the motor controller, or
a combination of both. The energy sent to the
controller is used to power the motor that turns
the wheel and makes the car move.
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Solar cars do have some of the standard features
found in conventional cars, such as turn signals
(front rear), brake lights, accelerator (gas
pedal), rear view mirrors, fresh air ventilation,
and usually cruise control.
Driver Controls
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The heart of a solar car is the electrical
system which is made up of batteries and power
electronics. The electrical system controls and
manages all the power that enters and exits the
system
Electrical System
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Drive Train
The drive train will consist of the electric
motor and the means by which the motor's power is
transmitted to the wheel causing the vehicle to
move.
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Mechanical Systems
They are designed to minimize friction and
weight while maintaining the strength needed to
handle the various road conditions.
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Solar Array
The solar array is the vehicle's only source of
power during the cross-country Rayce.
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Body Chassis
The most distinctive part of solar cars are the
bodies. The sleek and exotic shapes are eye
catching.
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Now you have a solar racing car!
Why not try your solar car?