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SUSPENSION SYSTEM full report - nizamt - 08-16-2017 Suspension system in automobiles Presented BY , SAGAR BABU-06J61A0318 What is suspension system Suspension is the term given to the system of springs, shock absorbers and linkages that connects a vehicle to its wheels Serve a dual purpose contributing to the car's handling and braking. Protects the vehicle itself and any cargo or luggage from damage and wear Different suspension systems Conventional suspension system Independent suspension system Air suspension system Hydro elastic suspension system Conventional suspension system Two wheels are mounted on either side of the rigid axle When one wheel encounters the bump, both the wheel do not execute parallel up and down motion So it gives rise to gyroscopic effect and wheel wobble Rear driving wheels mounted on live axle suspended by laminated leaf springs and shock absorbers Independent suspension system Both the front and the rear wheel are utilized Design incorporated in the front wheels One wheel goes down ,the other wheel does not have much effect Basic classification of the design MacPherson Strut Double Wishbone Multi link the most widely used front suspension system in cars comprises of a strut-type spring and shock absorber combo, which pivots on a ball joint on the single, lower arm. The steering gear is either connected directly to the lower shock absorber housing, or to an arm from the front or back of the spindle (in this case When you steer, it physically twists the strut and shock absorber housing (and consequently the spring) to turn the wheel DOUBLE WISHBONE SUSPENSION Type of double-A or double wishbone suspension Wheel spindles are supported by an upper and lower 'A' shaped arm. The lower arm carries most of the load. If you look head-on at this type of system, parallelogram system that allows the spindles to travel vertically up and down. This side-to-side motion is known as scrub Type of double-A arm suspension although the lower arm in these systems can sometimes be replaced with a single solid arm (as in my picture). The spring/shock combo is moved from between the arms to above the upper arm. This transfers the load-bearing capability of the suspension almost entirely to the upper arm and the spring mounts. The lower arm in this instance becomes a control arm. Multi-link suspension It's currently being used in the Audi A8 and A4 amongst other cars. The basic principle of it is the same, but instead of solid upper and lower wishbones, each 'arm' of the wishbone is a separate item. These are joined at the top and bottom of the spindle thus forming the wishbone shape. The super-weird thing about this is that as the spindle turns for steering, it alters the geometry of the suspension by torquing all four suspension arms. Spring is separate from the schock absorber. Advantages ( independent front ) Bigger deflection of front wheels, no reaction on steering Greater distance for resisting rolling action Front axle (small-stub), improves road holding tendency of tyres. Minimum vibrations DISADVANTAGES Better shock absorber required. Expensive Tyre wear increases due to transmission of torque. Advantages ( independent rear suspension) Lesser unsprung weight improves ride , reduces tyre wear. Increased passenger space Rear wheels remain stable .. DISADVANTAGES Increased cost Complicated design Steering action is not proper Traverse suspension system Normally find on the rear suspension Combines independent double wishbone suspension with a leaf spring. It involves one leaf spring mounted across the vehicle, connected at each end to the lower wishbone. The centre of the spring is connected to the front subframe in the middle of the car. There are still two shock absorbers, mounted one to each side on the lower wishbones. Air suspension Comprises of compressor , suppling air to air tank Pressure maintained 5.6 to 7 kg/sq.m Air bags on each wheel As load applied , air bags compressed actuating the levelling valve . Air from the tank fills the compressrd air bag & hence raise the level of the frame. Air from air bag gets released as load on chassis decreases . Air suspension layout Advantages of air suspension These maintain a constant frequency of vibration whether the vehicle is laden or unladen. Constant frame height is maintained. It helps to reduce the load while the vehicle in motion i.e. the dynamic loading as the spring rate variation between laden and unladen weight is much less. It gives smooth and comfort ride of the vehicle. The stiffness of the system increases with the increase of the deflection. Common Air Suspension Problems Air bag or air strut failure - due to old age, or moisture within the air system that damages them from the inside. Compressor failure - Primarily due to leaking air springs or air struts - Compressor burnout may also be caused by moisture from within the air system coming into contact with its electronic parts. Dryer failure - which functions to remove moisture from the air system eventually becomes saturated and unable to perform that function Hydrolastic Suspension a system where the front and rear suspension systems were connected together in order to better level the car when driving. The front and rear suspension units have Hydrolastic displacers, one per side. These are interconnected by a small bore pipe. Each displacer incorporates a rubber spring Damping of the system is achieved by rubber valves. when the front wheel encounter bumps ,the piston moves upwards pressurising the fluid to enter into the rear unit. Hydroelastic was eventually refined into Hydragas suspension.. Hydrogas suspension Known as hydro-pneumatic suspension. The difference is in the displacer unit itself. In the older systems, fluid was used in the displacer units with a rubber spring cushion built-in. With Hydragas, the rubber spring is removed completely. The fluid still exists but above the fluid there is now a separating membrane or diaphragm, and above that is a cylinder or sphere which is charged with nitrogen gas. The nitrogen section is what has become the spring and damping unit whilst the fluid is still free to run from the front to the rear units and back. Difference HELPER SPRING DIRECTLY MOUNTED ON MAIN SPRINGS TAKE CARE OF LARGE VARIATION IN SPRING LOAD DURING LIGHT LOADS ,ONLY MAIN SPIRNG IS ACTIVE , AS LOAD INCREASE TO A PARTICULAR FIXED VALUE , BOTH THE SPRINGS ARE ACTIVE SUSPENSION SYSTEM full report - kritika das - 08-16-2017 [attachment=2645] A PRESENTATION ON SUSPENSION SYSTEM PRESENTED BY:- NIKHIL VERMA ROLL NO. 13735 MECHANICAL 3RD YEAR INTRODUCTION Suspension system is the term given to the system of springs, shock absorbers and linkages that connects a vehicle to its wheels . It is basically cushion for passengers protects the luggage or any cargo and also itself from damage and wear. Sir William Brush is the father of suspension system in automobiles. ROLE OF SUSPENSION SYSTEM The main role of suspension system are as follows: It supports the weight of vehicle . Provides smoother ride for the driver and passengers i.e. acts as cushion. Protects your vehicle from damage and wear . It also plays a critical role in maintaining self driving conditions. It also keeps the wheels pressed firmly to the ground for traction . It isolates the body from road shocks and vibrations which would otherwise be transferred to the passengers and load. PRINCIPLE OF SUSPENSION Principle :-When a tire hits an obstruction, there is a reaction force. The size of this reaction force depends on the unsprung mass at each wheel assembly. In general, the larger the ratio of sprung weight to unsprung weight, the less the body and vehicle occupants are affected by bumps, dips, and other surface imperfections such as small bridges. A large sprung weight to unsprung weight ratio can also impact vehicle control. DEFINITIONS OF SPRUNG &UNSPRUNG MASS Sprung mass :-Sprung mass (weight) refers to vehicle parts supported on the suspension system, such as the body, frame, engine, the internal components, passengers, and cargo. Unsprung mass :- Unsprung mass refers to the components that follow the road contours, such as wheels, tires,brake assemblies, and any part of the steering and suspension not supported by the springs. WORKING OF SUSPENSION SYSTEM No road is perfectly flat i.e. without irregularities. Even a freshly paved highways have subtle imperfections that can be interact with vehicle s wheels. These are the imperfections that apply forces on wheels. According to Newton s law of motion all forces have both magnitude and direction. A bump in the road causes the wheel to move up and down perpendicular to the road surface. The magnitude of course ,depends on whether the wheel is striking a giant bump or a tiny speck. Thus, either the wheel experiences a vertical acceleration as it passes over an imperfection. PARTS OF TYPICAL SUSPENSION The suspension of a car is actually part of the chassis, which comprises all of the important systems located beneath the car's body. These system include : Frame Suspension system Steering system Tires or Wheels COMPONENTS OF ANY SUSPENSION There are three fundamental components of any suspension system . Springs Dampers Anti sway bars Anti-sway Bars:- Anti-sway bars (also known as anti-roll bars) are used along with shock absorbers or struts to give a moving automobile additional stability. An anti-sway bar is a metal rod that spans the entire axle and effectively joins each side of the suspension together. ADVANTAGES Comfort to passengers Good handling Shields the vehicle from damage Increases life of vehicle Keeps the tires pressed firmly to ground CONCLUSION From the whole discussion in suspension system, I observe that suspension system is like a white blood cell .As white blood cell provides energy to our body to fight against diseases or viruses which try to destroy or try to decrease our life ,in the similar way suspension system provides the energy to a vehicle to protect itself from damaging, increasing life of the vehicle ,increases the handing,increases comfort of passengers and many more. So, according to me if you remove the suspension system, then you feel like in bull- cart in Audi , Mercedes types luxurious cars. The only difference is speed. So, the scope of Suspension System is Too Bright. SUSPENSION SYSTEM full report - chandru - 08-16-2017 [attachment=6480] This article is presented by:Uzair Khan Suspension Control for Full Car Model Suspension systems Maximization of the friction between road surface and tyres. To provide the better road handling and ride conditions. Problem is constant suspension parameters. Possible suspension control models Quarter car model (Only informs about the Heave (vertical motion) of vehicle) Half car model (Information about Heave (vertical motion) and Pitch/Roll motion of the body) Full car model (Information about Heave (vertical motion) , Pitch and Roll motion of the body) State space representation SUSPENSION SYSTEM full report - Ann Milan - 08-16-2017 to get information about the topic "automotive suspension and steering systems" full report ppt and related topic refer the page link bellow http://seminarsprojects.net/Thread-suspension-system-full-report http://seminarsprojects.net/Thread-suspension-system-full-report?pid=17101&mode=threaded http://seminarsprojects.net/Thread-automotive-suspension-teaching-using-matlab to get information about the topic "automotive suspension and steering systems" full report ppt and related topic refer the page link bellow http://seminarsprojects.net/Thread-suspension-system-full-report http://seminarsprojects.net/Thread-suspension-system-full-report?pid=17101&mode=threaded http://seminarsprojects.net/Thread-automotive-suspension-teaching-using-matlab SUSPENSION SYSTEM full report - deepthy - 08-16-2017 Presented by: Sourabh Y. Rajput [attachment=6671] Suspension system The automobile chasis is mounted on the axle not directly but through some form of spring and other equipments which make a comfortable ride for passengers as well as goods and vehicle working parts Comfort and control Comfort is provided by isolating the vehicle's passengers from road disturbances like bumps or potholes . Control is achieved by keeping the car body from rolling and pitching excessively, and maintaining good contact between the tire and the road. SUSPENSION SYSTEM full report - ramesh - 08-16-2017 To get full information or details of SUSPENSION SYSTEM please have a look on the pages http://seminarsprojects.net/Thread-suspension-system-full-report?pid=17101&mode=threaded http://seminarsprojects.net/Thread-air-suspension-system?pid=28401&mode=threaded http://seminarsprojects.net/Thread-types-of-independent-suspension-system-ppt http://seminarsprojects.net/Thread-suspension-system-full-report?pid=24970&mode=threaded if you again feel trouble on SUSPENSION SYSTEM please reply in that page and ask specific fields in SUSPENSION SYSTEM SUSPENSION SYSTEM full report - Archana88 - 08-16-2017 [attachment=3578] Suspension system in automobiles Presented BY , RAJESWARAN - 05ME44 RAVI KUMAR - 05ME49 TOWFIQ AHAMED - 05ME64 What is suspension system Suspension is the term given to the system of springs, shock absorbers and linkages that connects a vehicle to its wheels Serve a dual purpose SUSPENSION SYSTEM full report - fawaz.s.m - 08-16-2017 to get information about the topic "suspension system" full report ppt and related topic refer the page link bellow http://seminarsprojects.net/Thread-air-suspension-system?pid=64414&mode=threaded http://seminarsprojects.net/Thread-suspension-system-full-report http://seminarsprojects.net/Thread-independent-suspension-system SUSPENSION SYSTEM full report - pravas behuria - 08-16-2017 to get information about the topic "suspension system" full report ppt and related topic refer the page link bellow http://seminarsprojects.net/Thread-air-suspension-system?pid=64414&mode=threaded http://seminarsprojects.net/Thread-suspension-system-full-report http://seminarsprojects.net/Thread-independent-suspension-system SUSPENSION SYSTEM full report - sumit kumar - 08-16-2017 to get information about the topic "suspension system in bike"full report ppt and related topic refer the page link bellow http://seminarsprojects.net/Thread-electromagnetic-suspension-full-report?pid=28099 http://seminarsprojects.net/Thread-electromagnetic-suspension-full-report?pid=25556&mode=threaded |