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

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Concept explainers

Introduction to Engineering Design Process

The engineering design process is a set of steps that engineers follow to come up with a solution to a particular problem. The solution to the problem involves the designing of a product that can accomplish a certain task and can qualify certain criteria. The process of designing is completely different from that of the scientific method, that you may be familiar with. If the project utilizes the observations, and the experiments then the engineering design process must be followed. The diagram shows the steps of the engineering design process, and the table below describes each step in more detail:

Question

100%

Design of machine elements

solve according to Khurmi

Please write clearly

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; Length of the spring when the valve is open
= 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.
%3D
W1
W2
L1
L2
480
304
45
60

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