PI3.1 In a certain diesel engine with a bore of 96 mm (3.78 in.), the thickness of the top ring is 2.5 mm (0.1 in.). At 90° after HDC on the power stroke, the piston is moving downward at 11 m/s (36 ft/s) and the combustion gas pressure is 550 kPa (80 psi). A Calculate the area of contact between the top ring and the cylinder liner. (b) Assuming the gas pressure on the inside edge of the ring acts on an area essentially equal to that calculated in part a, calculate the normal force due to gas pressure. (e) Also calculate the normal force due to ring tension, assuming ring tension is equivalent to 50 kPa (7.25 psi) of gas pressure, and the total normal force Fy acting on the ring. (d) Assuming the coefficient of sliding friction between the ring and liner is 0.42, calculate the shear force F, acting on the ring and the power absorbed by friction on the ring.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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top ring is 2.5 mm (0.1 in.). At 90° after HDC on the power stroke, the piston
is moving downward at 11 m/s (36 ft/s) and the combustion gas pressure is
550 kPa (80 psi).
Calculate the area of contact between the top ring and the cylinder liner.
(b) Assuming the gas pressure on the inside edge of the ring acts on an area
Assentially equal to that calculated in part a, calculate the normal force due to
gas pressure.
(e) Also calculate the normal force due to ring tension, assuming ring tension
is equivalent to 50 kPa (7.25 psi) of gas pressure, and the total normal force
Fy acting on the ring.
(d) Assuming the coefficient of sliding friction between the ring and liner is
0.42, calculate the shear force F, acting on the ring and the power absorbed
by friction on the ring.
m (n 00A in 1 thickness
Transcribed Image Text:top ring is 2.5 mm (0.1 in.). At 90° after HDC on the power stroke, the piston is moving downward at 11 m/s (36 ft/s) and the combustion gas pressure is 550 kPa (80 psi). Calculate the area of contact between the top ring and the cylinder liner. (b) Assuming the gas pressure on the inside edge of the ring acts on an area Assentially equal to that calculated in part a, calculate the normal force due to gas pressure. (e) Also calculate the normal force due to ring tension, assuming ring tension is equivalent to 50 kPa (7.25 psi) of gas pressure, and the total normal force Fy acting on the ring. (d) Assuming the coefficient of sliding friction between the ring and liner is 0.42, calculate the shear force F, acting on the ring and the power absorbed by friction on the ring. m (n 00A in 1 thickness
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