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Unit 4 UNDER THE BONNET By the end of the lesson, students will be able to: Master some new words Know how to use phrases to talk about the things under the bonnet of a car. Be able to explain how a car engine works. Improve listening, reading, writing and speaking.
Unit 4: UNDER THE BONNET What these abbreviations means? Work with a partner to see how many you know Brake horsepower Grams per kilometre Gasoline Direct Injection Miles per gallon Miles per hour Newton metre Revolutions per minute Rear-wheel drive Spark ignition Turbo direct injection Label the diagram with words from the box Clutch crankshaft engine gearbox piston propeller shaft piston crankshaf engine clutch gearbox Propeller shaf • An engine produces power by burning air and fuel The fuel is stored in a fuel tank (This is usually at the back of the car.) The fuel tank is connected to a fuel pipe The fuel pipe carries the fuel to a fuel pump The fuel pump is connected to the carburettor The fuel pump pumps the fuel into the carburettor In the carburettor the fuel is mixed with air The fuel and air are drawn into the engine In the engine the fuel and air are burned to produce power Are these statements true or false? Correct them if they are false An engine produces fuel by burning air and power The fuel tank is usually at the back of a car T Fuel is stored in a fuel tank T The fuel pump pumps fuel to the fuel tank F The carburettor is connected to the fuel pump T The carburettor mixes fuel and air T F • The power from the engine turns the flywheel The flywheel then turns the clutch The clutch is connected to the gearbox The clutch turns the gears in the gearbox The gearbox is filled with oil The gears decrease the speed of the engine • The gears turn the propeller shaft The propeller shaft then turns the gears in the differential The differential is also filled with oil The gears in the differential turn the half shafts and the half shafts turn the wheels Answer the following questions: The flywheel turns the clutch What does the flywheel turn? What is connected to the clutch? The clutch is connected to the gearbox Where does the clutch turn the gears? In the gearbox What the gears do? the gears decrease the speed of the engine Does the propeller shaft turn the gears in the gearbox?No, it doesn't What the half shafts do? The halfshaf turns the wheel combustion fuel Spark plug crankshaf piston torque cylinders clutch distribution Find words in exercise to complete the table Use your dictionary if necessary Verb Noun Adjective To _ (a) power Power (b) powerful _ combustion (c) combustible To _ (d) ignite ignition explode (e) To _ _ (f) Explosion explosive To _ (g) rotate Rotation (h) rotational To _ transmit (i) transmission rotational transmitted ignites explosion powerful combustion Circular Rectangular Triangular spherical Cuboid conical Cylindrical Square Listen to seven questions customers and match them with the answers (a-g) given by a technical support hotline employee Listen to seven questions customers and match them with the answers (a-g) given by a technical support hotline employee g b a e c d A potential customer is visiting the stand of a major car manufacturer at an international car show Listen to the dialogue and put these key features in the order in which they are mentioned 10 Now listen again and note down what these numbers refer to Engine size in litres Engine power in brake horse power Top speed in miles per hour The new engines available later in the year Fuel consumption around town in miles per gallon Fuel consumption for everyday driving Price in pounds Wheel size in inches 11 Match the two parts to make sentences from the dialogue (listen again if necessary) F B A T L U I F U C O Y L O I L N D T E R R O D I E S E L C Y L A R P I S N T O A N C I D K S P A R K P L U G W H A S H E R F T ... flywheel then turns the clutch The clutch is connected to the gearbox The clutch turns the gears in the gearbox The gearbox is filled with oil The gears decrease the speed of the engine • The gears... turn the gears? In the gearbox What the gears do? the gears decrease the speed of the engine Does the propeller shaft turn the gears in the gearbox?No, it doesn't What the half shafts do? The. .. gears turn the propeller shaft The propeller shaft then turns the gears in the differential The differential is also filled with oil The gears in the differential turn the half shafts and the half