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Diesel vs Gasoline Engine Operation

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Questions and Answers

What is the primary factor that controls engine rpm and power in a diesel engine?

Air and fuel mixture in the combustion chamber

Amount of fuel injected into a full charge of air (correct)

Engine structure and design

Type of fuel injection system used

What is a characteristic of diesel fuel when burned compared to gasoline?

It has a shorter burn duration

It produces more heat (correct)

It has a lower flash point

It produces less heat

Which of the following components is unique to a diesel engine?

Piston rings

Governor (correct)

Camshaft

Crankshaft

How do gasoline engines control power and rpm?

By varying the air and fuel mixture in the combustion chamber Signup and view all the answers

What is an advantage of diesel fuel compared to gasoline in terms of handling?

It is safer to handle due to lower volatility and higher flash point Signup and view all the answers

What is the primary difference between diesel and gasoline engines in terms of operation?

The method of controlling engine rpm and power Signup and view all the answers

What is the primary reason for a diesel engine's higher efficiency compared to a gasoline engine?

Lower pumping loss due to inlet restriction Signup and view all the answers

What is the air-fuel ratio of a diesel engine during acceleration?

20:1 Signup and view all the answers

What is the primary function of the exhaust stroke in a diesel engine?

To force the burned gases out through the exhaust port Signup and view all the answers

What is the main advantage of a diesel engine in terms of reliability?

High reliability in continuous operation Signup and view all the answers

What is a disadvantage of a diesel engine compared to a gasoline engine?

More expensive to manufacture Signup and view all the answers

What is the compression ratio of a diesel engine?

14:1 to 23:1 Signup and view all the answers

What is the result of the higher compression ratio in a diesel engine?

More efficient engine Signup and view all the answers

What is a characteristic of diesel fuel?

Unfavourable odour Signup and view all the answers

What is the primary reason for a diesel engine's heavier weight compared to a gasoline engine?

Heavier components required to withstand higher compression and combustion pressures Signup and view all the answers

What is a difficulty associated with starting a diesel engine in cold weather?

Difficulty in building up enough heat to ignite the fuel Signup and view all the answers