Assignment No 02 27/02/2015 Q - Prof. Ibrahim · PDF fileAssignment No 02 Date: 27/02/2015 ......

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Anjuman-i-Islam’s M.H.SABOO SIDDIK COLLEGE OF ENGINEERING Byculla, Mumbai-400 008. Department Of Automobile Engineering Vehicle Design Prof.Shaikh Ibrahim.I. Assignment No 02 Date: 27/02/2015 Q.01) ) A semi elliptical laminated vehicle spring to carry a load of 1500kgf is to consist of 7 leaves of 80mm width, two f these leaves extending the full legth of leaf spring. The pin distance is to be 1100mm. design the spring. Q 03.) A close coil helical spring is subjected to a varying load from 400N o 1200N continuously at frequency of 15 cycle per second. The spring stiffness is 25 N/ mm. For material of spring wire, Su =1735/d 0.1 N/ mm 2 Sys =875/d 0.1 N/ mm 2 Sno =550/d 0.15 N/ mm 2 G = 80000 N/ mm 2 Making suitable assumption design the spring considering fatigue. Draw dimensional sketch. Check natural frequency of vibration. www.ibrahimshaikh.com Q.02 a) Explain the variable rate leaf spring. b) What is nipping in leaf spring? Explain with neat sketch. c) Explain design of centrifugal clutch Q.04 a) Explain design consideration of steering system? b) Derive expression for fundamental condition for perfect rolling. Also discuss Ackerman & Davis steering gear in this context. What is the limitation of Davis steering gear? c) What do you understand by steering geometry? Explain Ackerman and Davis steering gear with their advantages and limitation. Q.05) The distance L between pivots of car is 1.27m. the knuckle arms are 0.165m long. The angle between the knuckle arm and the longitudinal axis of the car in the straight a head position is 20 o . The tread is 1.42m and L is 45% of the wheel base. Find the radius of the path near side front wheel for correct steering to the right.

Transcript of Assignment No 02 27/02/2015 Q - Prof. Ibrahim · PDF fileAssignment No 02 Date: 27/02/2015 ......

Anjuman-i-Islam’s

M.H.SABOO SIDDIK COLLEGE OF ENGINEERING Byculla, Mumbai-400 008.

Department Of Automobile Engineering

Vehicle Design

Prof.Shaikh Ibrahim.I.

Assignment No 02 Date: 27/02/2015

Q.01) ) A semi elliptical laminated vehicle spring to carry a load of 1500kgf is to consist of 7 leaves of 80mm width, two f these leaves extending the full legth of leaf spring. The pin distance is to be 1100mm. design the spring.

Q 03.) A close coil helical spring is subjected to a varying load from 400N o 1200N continuously at frequency of 15 cycle per second. The spring stiffness is 25 N/ mm. For material of spring wire, Su =1735/d0.1 N/ mm2 Sys =875/d0.1 N/ mm2

Sno =550/d0.15 N/ mm2 G = 80000 N/ mm2

Making suitable assumption design the spring considering fatigue. Draw dimensional sketch. Check natural frequency of vibration.

www.ibrahimshaikh.com

Q.02 a) Explain the variable rate leaf spring. b) What is nipping in leaf spring? Explain with neat sketch. c) Explain design of centrifugal clutch

Q.04 a) Explain design consideration of steering system? b) Derive expression for fundamental condition for perfect rolling. Also discuss Ackerman & Davis steering gear in this context. What is the limitation of Davis steering gear? c) What do you understand by steering geometry? Explain Ackerman and Davis steering gear with their advantages and limitation.

Q.05) The distance L between pivots of car is 1.27m. the knuckle arms are 0.165m long. The angle between the knuckle arm and the longitudinal axis of the car in the straight a head position is 20o. The tread is 1.42m and L is 45% of the wheel base. Find the radius of the path near side front wheel for correct steering to the right.