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2. The valve timing for a four stroke petrol engine is as follows: inlet open 4° L, inlet closes 50° L. Exhaust opens 50° E, exhaust closes 10° L. Each valve has a lift of 10 mm, the min. radius of each cam is 20 mm and the nose radius is 3 mm. The cams are of a circular arc type with flat faced followers. If the camshaft speed is 2000 rpm, determine: a) the cam profiles and calculate the maximum velocity, acceleration and retardation of each follower. b)the minimum force which must be exerted by the spring of each valve in order to overcome the inertia of the moving parts which weigh 5 N for each valve. $ c)the spring stiffness and its initial compression. d) the maximum torque on the camshaft if the coefficient of friction between the cam surface and follower is 0.2

2. The valve timing for a four stroke petrol engine is as follows: inlet open 4° L, inlet closes 50° L. Exhaust opens 50° E, exhaust closes 10° L. Each valve has a lift of 10 mm, the min. radius of each cam is 20 mm and the nose radius is 3 mm. The cams are of a circular arc type with flat faced followers. If the camshaft speed is 2000 rpm, determine: a) the cam profiles and calculate the maximum velocity, acceleration and retardation of each follower. b)the minimum force which must be exerted by the spring of each valve in order to overcome the inertia of the moving parts which weigh 5 N for each valve. $ c)the spring stiffness and its initial compression. d) the maximum torque on the camshaft if the coefficient of friction between the cam surface and follower is 0.2

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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2. The valve timing for a four stroke petrol engine is as follows: inlet open 4° L, inlet closes 50° L. Exhaust opens 50° E, exhaust closes 10° L. Each valve has a lift of 10 mm, the min. radius of each cam is 20 mm and the nose radius is 3 mm. The cams are of a circular arc type with flat faced followers. If the camshaft speed is 2000 rpm, determine: a) the cam profiles and calculate the maximum velocity, acceleration and retardation of each follower. b)the minimum force which must be exerted by the spring of each valve in order to overcome the inertia of the moving parts which weigh 5 N for each valve. c)the spring stiffness and its initial compression. d) the maximum torque on the camshaft if the coefficient of friction between the cam surface and follower is 0.2
Transcribed Image Text:2. The valve timing for a four stroke petrol engine is as follows: inlet open 4° L, inlet closes 50° L. Exhaust opens 50° E, exhaust closes 10° L. Each valve has a lift of 10 mm, the min. radius of each cam is 20 mm and the nose radius is 3 mm. The cams are of a circular arc type with flat faced followers. If the camshaft speed is 2000 rpm, determine: a) the cam profiles and calculate the maximum velocity, acceleration and retardation of each follower. b)the minimum force which must be exerted by the spring of each valve in order to overcome the inertia of the moving parts which weigh 5 N for each valve. c)the spring stiffness and its initial compression. d) the maximum torque on the camshaft if the coefficient of friction between the cam surface and follower is 0.2
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