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What affects the amount of fuel a car uses? - PowerPoint PPT Presentation


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What affects the amount of fuel a car uses? Fuel Consumption Measured in number of miles the car will travel on 1 gallon of petrol. In science we should measure in km/litre however all available data in miles/gallon or mpg

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Presentation Transcript
fuel consumption
Fuel Consumption
  • Measured in number of miles the car will travel on 1 gallon of petrol.
  • In science we should measure in km/litre however all available data in miles/gallon or mpg
  • The miles/gallon is worked out for an average journey including fast motorway driving and slow town driving.
energy transfer
Energy transfer
  • Fuel is a concentrated source of energy.
  • In the car engine the fuel is combined with oxygen.
  • The energy is transferred to the wheels of the car.
  • Some engines are more efficient than others. This means that they transfer more energy to the useful function (eg movement) and less as heat and sound.
the task
The task
  • You are starting out in car design. You are concerned about the environment and you want to reduce the amount of fuel used.
  • You need to consider what factors affect the number of miles a car will go on each gallon of petrol.

(Assume that engines are equally efficient)

factors
Factors

Petrol/diesel

Litres

Kg

acceleration (time to change speed from 0-60 mph

make

  • Type of fuel
  • Size of the engine
  • Mass of the car
  • Power of the engine
  • Shape of the car
suggestion
Suggestion
  • There are only 2 types of fuel.
  • Filter the fuel column so that you can compare the factors (mass, engine size, acceleration, make) for petrol cars then diesel cars.
excel support
EXCEL support
  • To filter.
  • Select all data (click empty cell in top left next to A column label)
  • On tool bar select DATA, then FILTER.
  • Select AUTOFILTER.
  • Select the arrow on the top of fuel column and choose petrol.
excel support10
EXCEL support
  • Sort the miles/ gallon column in ascending order (select all: DATA: SORT: Column E: ascending).
  • Highlight miles/gallon column and then (holding down control key) highlight another column.
  • Click the chart icon. Choose scattergraph.
  • Follow the wizard. Label the chart.
research
RESEARCH
  • There has been much publicity about the Honda Insight.
  • Honda claim that this car with its new engine design will give a fuel consumption of over 70mpg.
  • Use the INTERNET to find out why this engine is so different.