Fuel And Combustion Flashcards
What is the process by which fuel is converted into heat energy through a chemical reaction?
Combustion
True or False: Combustion is an exothermic reaction.
True
What is the primary purpose of combustion in engines?
To generate power
What are the three essential components needed for combustion to occur?
Fuel, oxygen, heat
What type of fuel is commonly used in internal combustion engines?
Gasoline
Fill in the blank: Combustion is a _____ reaction that releases energy.
Chemical
What is the unit of measurement for energy content in fuel?
BTU (British Thermal Unit)
What is the minimum temperature at which a fuel spontaneously ignites in air called?
Autoignition temperature
What are the products of complete combustion of hydrocarbons?
Carbon dioxide and water
In a stoichiometric combustion process, what is the ideal ratio of fuel to oxygen for complete combustion?
1:14.7
What is the term for the visible flame produced by combustion of gases?
Flame
What is the process of mixing fuel with air before combustion called?
Air-fuel ratio
What is the device used to ignite the fuel-air mixture in an engine called?
Spark plug
What is the primary purpose of a combustion chamber in an engine?
To contain the combustion process
What is the term for the unburned fuel that escapes combustion?
Incomplete combustion
What is the chemical symbol for oxygen?
O2
What is the process of converting fuel into mechanical energy without combustion called?
Electrochemical conversion
What is the term for the ratio of the mass of air to the mass of fuel in a combustion process?
Air-fuel ratio
What is the device that controls the air-fuel mixture in an engine called?
Carburetor
What is the term for the ignition of the fuel-air mixture before the spark plug fires?
Pre-ignition
What is the process of reducing the temperature in an engine to prevent knocking?
Cooling
What is the term for the rapid, uncontrolled combustion of fuel in an engine?
Knocking
What is the primary purpose of a fuel injector in an engine?
To deliver fuel into the combustion chamber
What is the term for the resistance of fuel to ignition under pressure?
Octane rating
What is the chemical symbol for gasoline?
C8H18
What is the term for the process of converting fuel into heat energy through a controlled combustion process?
Thermal efficiency
What is the primary purpose of a fuel pump in an engine?
To deliver fuel from the tank to the engine
What is the term for the ignition of the fuel-air mixture due to high temperatures in the combustion chamber?
Detonation
What is the primary purpose of a fuel filter in an engine?
To remove impurities from the fuel
What is the term for the process of converting fuel into mechanical energy through combustion?
Thermal efficiency
What is the primary purpose of a turbocharger in an engine?
To increase the power output by compressing air
What is the term for the process of reducing the temperature of the air-fuel mixture in an engine?
Intercooling
What is the primary purpose of a fuel pressure regulator in an engine?
To maintain consistent fuel pressure
What is the term for the process of converting fuel into heat energy through an exothermic reaction?
Combustion
What is the primary purpose of a fuel rail in an engine?
To deliver fuel to the injectors
What is the term for the process of converting fuel into mechanical energy through controlled combustion?
Thermal efficiency
What is the primary purpose of a wastegate in a turbocharged engine?
To regulate boost pressure
What is the term for the process of reducing the temperature of the air entering an engine?
Intercooling
What is the primary purpose of a fuel pressure gauge in an engine?
To monitor fuel pressure
What is the term for the process of converting fuel into heat energy through combustion?
Thermal efficiency
What is the primary purpose of a fuel tank in an engine?
To store fuel for the engine
What is the primary purpose of a wastegate actuator in a turbocharged engine?
To control the wastegate
What is the primary purpose of a fuel pressure sensor in an engine?
To measure fuel pressure
What is the primary purpose of a fuel line in an engine?
To transport fuel from the tank to the engine
What is the primary purpose of a wastegate spring in a turbocharged engine?
To control the wastegate opening pressure
What is the primary purpose of a fuel pressure relief valve in an engine?
To regulate fuel pressure
What is the primary purpose of a fuel pump relay in an engine?
To control the fuel pump operation
