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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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## What affects the amount of fuel a car uses?

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**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**• 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**• 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**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**• 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**• 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 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**• 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.

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