Q1.Design a valve spring of a petrol engine for the following operating conditions: Spring load when the valve is open = W1 N; spring load when the valve is closed = W2 N; - L1 mm; Length of the spring when the valve is closed = L2 mm, the spring index is 8 and the design factor of safety is 2. If the yield stress in shear is 810 MPa and endurance stress in shear is 440 MPa, the modulus of rigidity for the spring material may be taken as 80 kN/mm?. Find: 1. Size of the spring wire, 2. Mean diameter of the spring, 3. Number of active turns of the coils. Length of the spring when the valve is open W1 W2 L1 L2 480 304 45 60

Q1.Design a valve spring of a petrol engine for the following operating conditions: Spring load when the valve is open = W1 N; spring load when the valve is closed = W2 N; - L1 mm; Length of the spring when the valve is closed = L2 mm, the spring index is 8 and the design factor of safety is 2. If the yield stress in shear is 810 MPa and endurance stress in shear is 440 MPa, the modulus of rigidity for the spring material may be taken as 80 kN/mm?. Find: 1. Size of the spring wire, 2. Mean diameter of the spring, 3. Number of active turns of the coils. Length of the spring when the valve is open W1 W2 L1 L2 480 304 45 60

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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