1. A four-stroke internal combustion engine has the following specifications, Brake power =7.5 kW Speed =...

 

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1. A four-stroke internal combustion engine has the following specifications, Brake power =7.5 kW Speed = 1000 r.p.m Indicated mean effective pressure = 0.35 N/mm2 %3D Maximum gas pressure = 3.5 N/mm2 Mechanical efficiency = 80% Determine, (a) Dimensions of the cylinder, if length of stroke is 1.4 times the bore of the cylinder. (b) Wall thickness of the cylinder, if the hoop stress is 35 MPa. (c) Thickness of the cylinder head and the size of studs when permissible stresses for cylinder head and stud materials are 45 MPa and 65 MPa respectively. 1. A four-stroke internal combustion engine has the following specifications, Brake power =7.5 kW Speed = 1000 r.p.m Indicated mean effective pressure = 0.35 N/mm2 %3D Maximum gas pressure = 3.5 N/mm2 Mechanical efficiency = 80% Determine, (a) Dimensions of the cylinder, if length of stroke is 1.4 times the bore of the cylinder. (b) Wall thickness of the cylinder, if the hoop stress is 35 MPa. (c) Thickness of the cylinder head and the size of studs when permissible stresses for cylinder head and stud materials are 45 MPa and 65 MPa respectively.