U L These are the most important words you have met in this Module: O D UNIT 1 Charge bottom dead centre compression compression ratio connecting rod crankshaft cylinder displacement drive wheel exhaust valve ignition intake valve spark plug mechanical power port propulsion reciprocating spark spontaneous combustion stroke thrust top dead centre M 7 E REVISION AND PRACTICE VOCABULARY UNIT 2 battery carburettor combustion chamber compressor emission engine efficiency fuel cell fuel injection hybrid engine injector multi-port fuel injection output pump sensor turbine turbocharger Now use some of them to fill in the blanks. a. The ............................. is the amount of explosive needed to make an explosion. b. A ............................. ignites the fuel in a car engine. c. ............................. is the burning of a substance caused by chemical changes inside it and not by fire or heat from outside. d. The force that drives something forwards is called ............................. . e. A ............................. system is based on the act of forcing liquid into something. f. Gasoline vehicles used to include ............................. to mix petrol and air together. g. ............................. are devices that can react to light, heat, pressure or other environmental data in order to make machines respond to their input and do or show whatever is necessary. h. A ............................. is a system driven by a ............................. that gets its power from an engine s exhaust power: it sends the mixture of petrol/air into the engine at high pressure and makes the engine more powerful. i. The word ............................. refers to the amount of power, energy produced by a piece of equipment. j. ............................. are machines used to force liquid, gas or air into or out of something. k. The expression ............................. refers to the position of an engine piston and its crankshaft arm when at the top end of its stroke. l. Almost all modern vehicles employ internal combustion engines for their ............................. . m. The piston travels four times inside the cylinder to complete the process of combustion and each movement is called a ............................. . n. The ............................. allows the air/fuel mixture to enter the cylinder. o. Combustion occurs in a ............................. inside the engine. p. ............................. use a combination of two alternative technologies, fuel-cells and batteries. q. Some electric cars use ............................. engines which are zero-emissions engines. r. The exhaust-gas ............................. (ATL) consists of two main elements: a turbine and a compressor. 276