Question 5: BalancingA five cylinder in-line engine running at 750 r.p.m. has successive cranks 144°apart, the distance between the cylinder centre lines being 375 mm. The pistonstroke is 225 mm and the ratio of the connecting rod to the crank is 4. Thereciprocating mass for each cylinder is 15 kg.5.1.5.2.Examine the engine for balance of primary forces and couples.5.3. Calculate the maximum values of unbalanced primary couple.Simply the data in a table form and illustrate the primary and secondary positionof the cranks.

Given: Speed of each engine→N=750 rpm Successive crank angle→θ=144° Distance between the cylinder…

Answered: Question 5: Balancing A five cylinder…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Seatwork No. 1 An SI I-2 square engine operates on a 2-stroke cycle at 2400 rpm. The average piston speed is 15 m/se and the no. of piston action is 2. When the piston is at its maximum position the remainder volume is 0.005 Liters. Determine: a. Volumetric displacement per unit time for all cylinders (m³/sec) b. Compression ratio c. Volume at Bottom Dead Center (m³)
Balancing 425 Q.7 A twin cylinder V-engine has the cylinders set at an angle of 45°, with both pistons connected to the single crank, The crank radius is 62.5 mm and the connecting rods are 275 mm long. The reciprocating mass per line is 1.5 kg and the total rotating mass is equivalent to 2 kg at the crank radius. A balance mass fitted opposite to the crank, is equivalent to 2.25 kg at a radius of 87.5 mm. Determine for an engine speed of 1800 r.p.m.; the maximum and minimum values of the primary and secondary forces due to the inertia of reciprocating and rotating masses. [Ans. Primary forces : 3240 N (max.) and 1830 N (min.) Secondary forces : 1020 N(max.) and 470 N(min.)]
2. Design a cast iron trunk type piston for a single acting four stroke engine developing 75 kW per cylinder when running at 600 r.p.m. The other avialable data is as follows: Maximum gas pressure = 4.8 N/mm2; Indicated mean effective pressure = 0.65 N/mm?; Mechanical efficiency = 95%; Radius of crank = 110 mm; Fuel consumption = 0.3 kg/BP/hr; Calorific value of fuel (higher) = 44 x 10°KJ/kg; Difference of temperatures at the centre and edges of the piston head = 200°C; Allowable stress for the material of the piston = 33.5 MPa; Allowable stress for the material of the piston rings and gudgeon pin = 80 MPa; Allowable bearing pressure on the piston barrel = 0.4 N/mm2 and allowable bearing pressure on the gudgeon pin = 17 N/mm2.
Prob # 8. If the inertia is 80 lb-ft2, and the speed of the driven shaft is to be increased from 0 to 1500 rpm in 3 seconds. Calculate the heat generated for each engagement if clutch starting torque is 10 in-lb. a. 50 Btu b. 50 Btu c. 30.50 Btu d. 51.50 Btu
The crank radius of a single-cylinder IC engine is 60 mm and the diameter of the cylinder is 80 mm. What is the swept volume of the cylinder?
The diameter of the pulley on the compressor shaft must not be greater than 1.2 metre while the centre distance between the pulleys is limited to 1.85 metre. A compressor, requiring 95000W is to run at about 500 r.p.m. The drive is by V- belts from an electric motor running at 1500 r.p.m. The belt speed should not exceed 1500 m/min. The coefficient of friction between the belt and the pulley is 0.3. Determine the number of V-belts required to transmit the power if each belt has a crosssectional area of 3 cm2, density 1100 kg/m3 and an allowable tensile stress of 3 MPa. The groove angle of the pulley is 50°. Calculate also the length required of each belt.
What is the power (?) lost to main crankshaft friction in a four-cylinder engine with a 100mmbore and stroke if the engine is operating at 1500 rpm? Assume the main crankshafthas five bearings, each with a diameter of 50 mm and length of 25 mm.
Problem #1 SLIDER CRANK MECH ANISM Compute the forces exerted on the connecting rod. Crank angular velocity = 6 r/s =const. Crank wt. = 2 lbs. Connecting rod wt. = 10 lbs. Slider wt. = 2 lbs.
1. A three cylinder single acting engine has its cranks set equally at 120° and it runs at 800 r.p.m. Thetorque-crank angle diagram for each cycle is a triangle for the power stroke with a maximum torque of 100N-m at 60° from dead centre of corresponding crank. The torque on the return stroke is sensibly zero.Determine: 1. power developed. 2. Coefficient of fluctuation of speed, if the mass of the flywheel is 15 kgand has a radius of gyration of 70 mm, 3. Coefficient of fluctuation of energy, and 4. Maximum angularacceleration of the flywheel.
The volume of air in a diesel engine cylinder at the end of suction stroke is 1000 cc while the volume prevailing in the cylinder at the end of exhaust stroke is 150 cc. The piston speed is found to be about 1200 m/min and the stroke to bore ratio is 1.2. If the engine develops power in every alternate rotations of the crankshaft, determine the number of cycles per minute. 4.
8. If the inertia is 80 lb-ft2, and the speed of the driven shaft is to be increased from 0 to 1500 rpm in 3 seconds. Calculate the heat generated for each engagement if clutch starting torque is 10 in-lb.
5. A 5.6 liter V10 compression-ignition truck engine operates on a four stroke cycle at 3600 rpm producing 162 kW of power in the shaft. The bore and stroke of the engine are related as S = 1.12 B. Calculate: (15 pts) a. Average piston speed (m/s) b. Torque (N-m) c. Brake mean effective pressure

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