K10870 aaftab alam ic engine me 6 th sem
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This document presents a major assignment presentation on nitro shock absorbers by a mechanical engineering student. The 3-page presentation covers the introduction, principle, need for nitro shock absorbers, why gas filled shocks are used, components, working, advantages, tips for mounting, and conclusion. It discusses how nitro shock absorbers work using viscous damping to control spring movements and prevent oscillations. Gas filled shocks are designed to reduce foaming of the oil within by using a dividing piston to separate the oil and gas chambers. The advantages of nitro shock absorbers include instantaneous response, better fade resistance, durability and no need for re-adjustment.
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This document discusses nitro shock absorbers, which are nitrogen-filled shock absorbers designed to provide a smooth ride. Nitro shock absorbers work by absorbing the kinetic energy of the vehicle's suspension movements and converting it to heat using hydraulic fluid. They contain nitrogen gas which limits foaming of the fluid, increasing efficiency over traditional shocks. The document describes the components and working of nitro shock absorbers, including how compression and rebound strokes function with gas and oil chambers separated by a dividing piston. It outlines advantages like better fade resistance and durability compared to non-gas shocks.
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A shock absorber uses fluid and valves to damp vibrations from vehicle suspension springs. It consists of an inner cylinder inside an outer reservoir, with a piston connecting the cylinder to the vehicle frame. Fluid passes through the piston and valves as it moves up and down, with resistance from small holes and viscosity of the fluid absorbing energy from vibrations. Telescopic shock absorbers have this basic design but also include a piston rod connecting the inner cylinder to the axle, and valves in the piston and cylinder foot that control fluid flow to provide damping in both compression and rebound strokes.
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K10870 aaftab alam ic engine me 6 th sem
- 1. CAREER POINT UNIVERSITY MAJOR ASSIGNMENT PRESENTATION ON NITRO SHOCK ABSORBER • PRESENTED BY: • AAFTAB ALAM • UID-K10870 • BRANCH-MECHANICAL • SEM/YEAR-6th/3rd • PRESENTED TO: • MR.AMARDEEP KUMAR Assistance Proff.Of Mechanical Deptt.
- 2. TABLE OF CONTENT • INTRODUCTION • PRINCIPLE • NEED FOR NITRO SHOCK ABSORBER • WHY GAS FILLED • GAS FILLED SHOCK • COMPONENT • WORKING • ADVANTAGE • TIPS BEFORE MOUNTING • CONCLUSION • REFERENCE
- 3. INTRODUCTION • A nitro shock absorber is basically a hydraulic damping mechanism for controlling spring vibrations. • It controls spring movements in both directions: when the spring is compressed and when it is extended. • The amount of resistance needed in each direction is determined by the type of vehicle, the type of suspension. • Shock absorbers are a critical product that determines an automobile's character • It not only by improving ride quality but also by functioning to control the attitude and stability of the automobile body.
- 5. PRINCIPLE OF OPERATION • The damping mechanism of a shock absorber is viscous damping. • Viscosity is the property of a fluid by virtue of which it offers resistance to the motion of one layer over the adjacent on. • The main components of a viscous damper are cylinder, piston and viscous fluid. • There is a clearance between the cylinder walls and the piston. • More the clearance more will be the velocity of the piston in the viscous fluid and it will offer less value of viscous damping coefficient.
- 6. NEED FOR NITRO SHOCK ABSORBER • Springs alone cannot provide a satisfactorily smooth ride. • Oscillation of spring causes the wheel to rebound, or bounce up and down. • Control over the vehicle can be lost. • Shock absorbers prevent these spring oscillations.
- 7. WHY GAS FILLED SHOCKS? • Rapid movement of the fluid between the chambers cause foaming. • Results in a lag because the piston moves through an air pocket which offers resistance. • Foaming results in a decrease of damping and a loss of spring control. • Pressure increases in front of the piston and drops behind it. • All together results in foaming and loss of shock absorber control.
- 8. GAS FILLED SHOCKS • Designed to reduce foaming of the oil. • Construction is similar except the double tube, here a dividing piston is used. • Two chambers – oil & gas.
- 9. COMPONENT • Upper and lower mounts. • Hydraulic chamber containing hydraulic fluid. • Gas chamber containing nitrogen at 25 bars. • Dividing piston.
- 10. WORKING • The piston rod is moved into the shock absorber which displaces the oil. • This causes the dividing piston to press on the gas chamber, reducing it in size. • While returning the gas pressure returns the dividing piston to its initial position. • The pressure decrease behind the working piston cannot be high for the gas to exit from the oil column. • Thus the gas filled shock absorber operates without foaming.
- 11. ADVANTAGES • Instantaneous response. • Better fade resistance. • Better durability. • No need for re-adjustment.
- 12. TIPS BEFORE MOUNTING • Avoid stiff suspensions. • Avoid new shocks to compensate for old and tired springs. • Worn shocks reduce safety and handling. • The best advice come from a mechanic who knows your vehicle.
- 13. CONCLUSION • In current scenario of automobile industry the need for vehicles which provide smooth and comfort ride is growing.Nitro shock absorber are design to be ultimate in performance and comfort.In a country like our whose roads are not upto world standards the need for automotive component like nitro shock are necessary.
- 14. REFERENCE • GOOGLE • WIKIPEDIA • WWW.SEMINAR.COM