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Q What is the difference between a

4th June 1971, Page 52
4th June 1971
Page 52
Page 52, 4th June 1971 — Q What is the difference between a
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Which of the following most accurately describes the problem?

turbo-charged diesel engine and an ordinary diesel? I am 15 years' old and am learning about commercial vehicles. I know that turbo-charging increases the power of an engine.

AThe power of a diesel engine depends on

the amounts of fuel and air that are mixed together in the engine's cylinders. Fuel is injected into the combustion chamber of each cylinder and burns with the air in the cylinder as it is injected. Increasing the amount of fuel increases the output of the engine, but the maximum power is limited by the amount of air that can be drawn into the cylinder. A turbo-charger is driven by the exhaust gas of the engine and is used as a compressor to increase the weight of air in the cylinders. this enables more fuel to be injected and burnt in the cylinders and more power to be produced, As indicated, air is necessary for combustion of the fuel. If there is insufficient air in the cylinders to provide for combustion of all the fuel injected, fuel is wasted and black smoke is produced.

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