1.If the petrol engine used in this experiment at a full throttle setting(thrott
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Question
1.If the petrol engine used in this experiment at a full throttle setting(throttle valve fully open)consumes 20ml of fuel in 2 mins and 15 sec, what is the mass flow rate of fuel? How much power has been input to the system?
2.How would you expect the fuel consumption and performance(output power and efficiency) of the engine at a part throttle setting(throttle calce partially closed) to compared to the engine at a full throttle setting?
3. List and briefly describe the four stages or processes in the operation of a four-stroke internal combustion engine. What are the two ways in which fuel combustion can be initiated in an internal combustion engine?
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Explanation / Answer
q1)
in 135 second = 20 ml fuel used
in 3600 saeconds = 533 ml fuel will be used.
q2)
fuel consumption will be higher at full throttle as compared to part throttle .
performance will also be higher at full throttle
q3)
intake
it is when piston sucks in the mixture of fuel and air
compression
in this process the piston compresses the mixture
ignition
the spark plug ignites the mixture resulting in power stroke
exhaust
the burned fuel and exxhaust gases are expelled in this process.
fuel can be either be spark ignited as is the case of petrol engines, or it may compression ignited, as is the case of diesel engines.
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