41 Questions
What is the purpose of supercharging an engine?
To raise the density of the air charge before it enters the cylinders
How does supercharging lead to higher engine power output?
By providing more oxygen available for combustion than naturally aspirated engines
What is a key point to note about supercharging an engine?
Supercharging consumes a certain percentage of power for compressing air
How does supercharging impact the amount of air and fuel per cycle in an engine?
It increases the amount of air and fuel per cycle
What trend is emerging in engine design to meet emission legislation and consumer demands?
Adopting smaller displacement engines with supercharging
What is the main benefit of having forced induction, or supercharging, in engines?
Increased oxygen availability for combustion
Which type of supercharger is commonly used in automotive engines?
Centrifugal type
What is the approximate speed at which the impeller of a centrifugal type supercharger runs?
$80,000$ revolutions per minute
Which supercharger operates like a gear pump?
Root's type
What is a special problem associated with the vane type supercharger?
Wear of tips of the vanes over time
Which method of supercharging involves an independently driven compressor or blower?
Ram effect
What is a key consideration when choosing a supercharger for a specific application?
Longevity and wear characteristics
What is a crucial factor to prevent detonation when using supercharging?
Using a fuel with better antiknock characteristics
Which material is often used to make impellers for superchargers?
Aluminum
What is the significance of supplying more air-fuel mixture into the cylinder due to supercharging?
Improved engine performance
In which situation would a centrifugal type supercharger be most suitable?
Low-speed applications
What is the role of the waste gate in a turbocharger assembly?
Control the maximum boost pressure to prevent engine damage
Which component can help maintain higher power levels at higher altitudes in an engine?
Supercharger
How do superchargers contribute to improved fuel efficiency?
By enabling smaller engines to produce power comparable to larger ones
What is the main drawback of superchargers compared to turbochargers?
Higher maintenance requirements
What is the main aim of the designer in relation to power loss due to friction?
To minimize power loss in friction
Which method is also known as the fuel rate extrapolation method?
Willan's Line Method
Which type of engine operation shows an appreciable reduction in smoke for a turbocharged engine?
Overload operation
What is the measure of gross power developed by the engine in the Morse test?
Brake power
What is the primary function of a waste gate solenoid in a computer-controlled turbocharging system?
Open or close the waste gate to control boost pressure
Why is it essential to take great care when extrapolating the line in Willan's Line Method?
To ensure accuracy due to non-linear graph behavior
What is a significant advantage of superchargers over turbochargers in terms of power delivery?
Immediate power delivery
What does the Morse test assume about pumping and friction losses when a cylinder is made inoperative?
They remain constant
In Willan's Line Method, what does the negative intercept of the x-axis represent?
Energy spent in overcoming friction
Why is the Morse test applicable only to multi-cylinder engines?
It requires more than one cylinder for comparison purposes
What is considered a drawback of Willan's Line Method with regards to data extrapolation?
'The line' does not reflect engine efficiency changes accurately
'The directional margin of error' in Willan's Line Method refers to what?
The steepness of the slope on the graph
Why is it important to consider as many readings as possible at light loads in Willan's Line Method?
To establish the true nature of 'the curve'
What is the major advantage of supercharging mentioned in the text?
Quicker acceleration of vehicle
Why do supercharged engines usually have a greater valve overlap period?
To allow cooler air to flow past the valves and piston crown
Which part of a turbocharger is responsible for sucking air into the compressor housing?
Turbine wheel
What limits the degree of supercharging an engine can withstand according to the text?
Durability, reliability, and fuel economy
Why is greater valve overlap important in supercharged engines?
To allow greater time for cooler air to flow past valves and piston crown
What is the purpose of turbolag mentioned in the context of turbocharging?
To give a short delay before increasing manifold pressure
How do supercharged engines overcome the problem of increased heat generation?
By using materials that can withstand higher temperatures
What is one of the limitations of supercharging on engine parts according to the text?
Increased thermal load on engine parts
Explore the concept of supercharging in internal combustion engines and its role in improving engine power output. Learn about the new trend towards small displacement engines to meet emission legislation while still maintaining performance standards.
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