A six-cylinder, four-stroke internal combustion engine with compression ratio of
ID: 1863060 • Letter: A
Question
A six-cylinder, four-stroke internal combustion engine with compression ratio of 17 and
displacement volume of 4.5 L is modeled using the ideal diesel cycle. Consider air in the
cylinder is at 95 kPa and 57?C at the start of compression. The engine operates at a speed
of 2000 rpm. Heat input of 6.63 kJ occurs in every cycle. Consider variable specific
heats for air.
(a) Calculate the maximum pressure (kP) and maximum temperature (?C) in the cycle.
(b) Determine the cut-off ratio of the cycle.
(c) Calculate thermal efficiency (%) of the cycle.
(d) Find the mean effective pressure (kPa) of the cycle.
(e) What is the total power output (kW) of the engine?
Explanation / Answer
A six-cylinder, four-stroke internal combustion engine with compression ratio of