The document discusses Bose's electromagnetic suspension system for automobiles. It aims to solve the conflict between passenger comfort and vehicle control that traditional suspensions struggle with. Bose's system uses linear electromagnetic motors at each wheel, controlled by power amplifiers and algorithms, to isolate passengers from bumps while minimizing vehicle body motion like rolling and pitching. It allows both a smooth, comfortable ride and precise handling. The system is poised to replace shocks and springs, providing the benefits of both a luxury and sports car suspension.
this is a type active suspension system. the presentation was 1st runner up for Mahindra automobiles india lmt. competition on solution to the better suspension system for sedans. few other types have also been discussed.
Electronic Brake force distribution (EBFD)Felis Goja
EBD is an automobile brake technology that automatically varies the amount of force applied to each of a vehicle's wheels based on road conditions, speed, loading on wheel etc.
This is mechanical engineering presentation on power steering system. In this presentation i describe basics of power steering and their history. I hope it will help you for your engineering and you can understand better about mechanical engineering.
This is Mechanical project report on Fabrication of an Active Air Suspension System. Air ride suspension
carries the load on each axle with a pressurized air bag just as a high pressure balloon. This system provides
the smoothest and most shock free ride of any of the known vehicle suspension system. An air suspension
includes a multiple air spring assemblies that each includes a piston airbag and a primary airbag mounted over
the piston airbag. The main and piston air bags each have a variable volume that is controlled independently
of the other for active suspension control.
this is a type active suspension system. the presentation was 1st runner up for Mahindra automobiles india lmt. competition on solution to the better suspension system for sedans. few other types have also been discussed.
Electronic Brake force distribution (EBFD)Felis Goja
EBD is an automobile brake technology that automatically varies the amount of force applied to each of a vehicle's wheels based on road conditions, speed, loading on wheel etc.
This is mechanical engineering presentation on power steering system. In this presentation i describe basics of power steering and their history. I hope it will help you for your engineering and you can understand better about mechanical engineering.
This is Mechanical project report on Fabrication of an Active Air Suspension System. Air ride suspension
carries the load on each axle with a pressurized air bag just as a high pressure balloon. This system provides
the smoothest and most shock free ride of any of the known vehicle suspension system. An air suspension
includes a multiple air spring assemblies that each includes a piston airbag and a primary airbag mounted over
the piston airbag. The main and piston air bags each have a variable volume that is controlled independently
of the other for active suspension control.
1) Suspension is the term given to the
system of springs, shock absorbers and
linkages that connect a vehicle to its
wheels
3) Serve a dual purpose – contributing to the
car's handling and braking.
2) Protects the vehicle itself and any cargo or
luggage from damage and wear
An anti-lock braking system (ABS) is a safety anti-skid braking system used on aircraft and on land vehicles, such as cars, motorcycles, trucks and buses. ABS operates by preventing the wheels from locking up during braking, thereby maintaining tractive contact with the road surface
Air Suspension System is commonly use in BMW,Mercedes,Audi types luxurious types Cars for protect from damaging, increasing life of the vehicle ,increases the handling , 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, BMW type luxurious cars . The only diffrence is speed.
So the scope of Suspension System is Too Bright !!!
1) Suspension is the term given to the
system of springs, shock absorbers and
linkages that connect a vehicle to its
wheels
3) Serve a dual purpose – contributing to the
car's handling and braking.
2) Protects the vehicle itself and any cargo or
luggage from damage and wear
An anti-lock braking system (ABS) is a safety anti-skid braking system used on aircraft and on land vehicles, such as cars, motorcycles, trucks and buses. ABS operates by preventing the wheels from locking up during braking, thereby maintaining tractive contact with the road surface
Air Suspension System is commonly use in BMW,Mercedes,Audi types luxurious types Cars for protect from damaging, increasing life of the vehicle ,increases the handling , 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, BMW type luxurious cars . The only diffrence is speed.
So the scope of Suspension System is Too Bright !!!
Active suspension System of Automobiles.Mayank khare
An active suspension system,has the capability to adjust itself continuously to changing road conditions. It "artificially" extends the design parameters of the system by constantly monitoring and adjusting itself, thereby changing its character on an ongoing basis. It's schizophrenic, if you will, but with a purpose. With advanced sensors and microprocessors feeding it information all the time, its identity remains fluid, contextual, amorphous. By changing its character to respond to varying road conditions, active suspension offers superior handling, road feel, responsiveness and safety.
Advancement in Suspension System: - A Reviewdbpublications
The purpose of presenting this review paper is to provide in-depth information about suspension system. It explains the comforts and safety of the passenger. It illustrates the importance of the suspension system in automobile. Vehicle suspensions systems typically rated by its ability to provide good road handling and improve passenger comfort. It also says the improvement that has been taken place in the suspension system for a better ride and driver comfort. The foremost suspension was Bose electromagnetic suspension. The advancement that has been used in the suspension system is for cars. The three technologies that had made cars even better than first that is: - 1. DRC (dynamic ride control), 2. Magnetic Dampers (AUDI R8), 3.Active Curve Tilting. Further it illustrates the specification and causes of the invention and it also describes the electromagnetic active suspensions. The future trends of automotive suspensions are due to simple structure, high-bandwidth, accurate and flexible force control, high ride quality, good handling performance, and energy regeneration. It says the application and better enrolment of suspension system.
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10 بكالوريوس في الخدمات اللوجستية والإمداد
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Different Modes in Four Wheel Steered Multi-Utility Vehiclesresearchinventy
Four wheel steering is the innovative technology in which research is going on. The front-to-rear wheel alignment plays a significant role in the directional stability of a vehicle in a good manner. Four wheel steering is the system that allows the rear wheels to turn for maneuvering, rather than just follow the front wheels. The system is employed by some vehicles to improve steering response, increase vehicle stability while maneuvering at high speed, or to decrease turning radius at low speed. In Four Wheel Steering System, the rear wheels do play an active role for steering, which can be guided at high as well as in low speeds. In this paper we made a four wheel steered vehicle for the analysis of four wheel steering systems (4WS). Apart from normal front wheel steered vehicle our designed model can work in all four modes of four wheel steering. The four modes include front wheel steering, 360 degree rotation of vehicle with in the position, parallel parking mode and shorter radius mode. 4WS is one of the devices which are used for the improvement of vehicle maneuverability and stability. Another significant finding is the effect of vehicle add-ons which showed how a multi utility vehicle can be made by giving a floor cleaning machine with it. We introduced Neodymium magnets to attract metal scraps, which helps us to clean the floor. It is expected that our different modes will be very beneficial to everyone who involved or interested in the automotive design, steering modes, analysis, performance assessment and applications of various types of four wheel steering systems.
Design and Analysis of Pedal Box with Braking Systemijtsrd
A design process for an automotive pedal box system is presented in this paper. The work begins with a review of research carried out on pedal box system. It is followed by the process of designing a complete pedal box system. Reverse engineering process by using a steel pedal box system by use of MS Plate. The Pedal box design with proper pedal ratio and the use of single brake for both front and rear braking is designed. Md. Hameed | B. Praveen Kumar | B. Rohit | B. Surya Sai | G. Sai Kiran ""Design and Analysis of Pedal Box with Braking System"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-3 , April 2019, URL: https://www.ijtsrd.com/papers/ijtsrd23413.pdf
Paper URL: https://www.ijtsrd.com/engineering/mechanical-engineering/23413/design-and-analysis-of-pedal-box-with-braking-system/md-hameed
The brakes function by absorbing in friction the energy possessed by the moving car. In so doing they convert the energy into heat. There are two types of brakes, the drum brake, and the disc brake. Either or both types may be fitted. But where both types are used it is usual for the disc brakes to be fitted to the front wheels. In both drum and disc brakes, a hydraulic system applies the brakes. The hydraulic system connects the brake pedal to the brake parts at each wheel.
Kinematics and Compliance of Sports Utility VehicleIRJEETJournal
Today, we have to consider different demands to make a successful and reliable concept design of modern suspension systems. Beside package and lightweight construction especially the real scopes of a suspension system, kinematics and compliances are getting more and more important to fulfill all the technical needs coming from the automotive market. In particular, the development of suspension system for sport utility vehicle (SUVs) has to satisfy various demands and strong characteristic criteria coming from the on-road and off-road driving conditions.
In this paper, the main kinematics and compliance effects for an independent SUV suspension system will be explained and illustrated:
Explanation of different load cases coming from the individual purpose of a sport utility vehicle (off road & on road)
- Illustration of the K&C influences coming from the use of active systems to control roll and pitch angles or the individual wheel loads
- Development of an analytic approach to solve the kinematic and compliance needs.
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An anti-lock braking system (ABS) is a safety system on motor vehicles which prevents the wheels from locking while braking.
A rotating road wheel allows the driver to maintain steering control under heavy braking, by preventing a locked wheel or skid, and allowing the wheel to continue to forward roll and create lateral control, as directed by driver steering inputs. Disadvantages of the system include increased braking distances under some limited circumstances (snow, gravel, "soft" surfaces), and the creation of a "false sense of security" among drivers who do not understand the operation, and limitations of ABS. A brake is one of the most important parts of any type of vehicle. Brake is used to retard or stop a vehicle. Here Kinetic energy transferred into Heat energy. The kinetic energy increases with the square of the velocity. So, K.E.=1/2mv².An anti-lock braking system is a safety system that allows the wheels on a motor vehicle to continue interacting attractively with the road surface as directed by driver steering inputs while braking, preventing the wheels from locking up (that is, ceasing rotation) and therefore avoiding skidding.
Stopping a car in a hurry on a slippery road can be very challenging. Anti-lock braking systems (ABS) take a lot of the challenge out of this sometimes nerve-wracking event. In fact, on slippery surfaces, even professional drivers can't stop as quickly without ABS as an average driver can with ABS.
An ABS generally offers improved vehicle control and decreases stopping distances on dry and slippery surfaces for many drivers; however, on loose surfaces like gravel or snow-covered pavement, an ABS can significantly increase braking distance, although still improving vehicle control.
Since initial widespread use in production cars, anti-lock braking systems have evolved considerably. Recent versions not only prevent wheel lock under braking, but also electronically control the front-to-rear brake bias.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
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Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
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This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
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input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Governing Equations for Fundamental Aerodynamics_Anderson2010.pdf
Electromagnetic Suspension
1. Savitribai Phule Pune University
ABSTRACT
Today’s vehicle suspensions use hydraulic dampers (shock absorbers) and springs that
are charged with the tasks of absorbing bumps, minimizing the car's body motions
while accelerating, braking and turning and keeping the tires in contact with the road
surface. Typically, these goals are somewhat at odds with each other. Luxury cars are
great at swallowing bumps and providing a plush ride, but handling usually suffers as
the car is prone to pitch and dive under acceleration and braking, as well as body lean
under cornering .On the other end of the spectrum, stiffly sprung sports cars exhibit
minimal body motion as the car is driven aggressively, as cornering is flat, but the
ride quality generally suffers.
In an ongoing research project that has spanned over 24 years Bose has created a
unique electromagnetic suspension system for automobiles that is close to commercial
release and is set to replace traditional shocks and springs with electronic actuators.
"This is the first time a suspension system is the same for a sports car and for a luxury
car", said its creator, Dr Amar Bose, chairman and head of technical design. The
result is a ride that is level and bump free over incredibly rough terrain and when the
vehicle turns in to corners.
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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2. Savitribai Phule Pune University
2. BACKGROUND
2.1 Suspension
2.1.1 Every automotive suspension has two goals
1] Passenger comfort
2] Vehicle control.
Comfort is provided by isolating the vehicle’s passengers from road disturbances.
Control is achieved by keeping the car body from rolling and pitching excessively,
and maintaining good contact between the tire and the road. Unfortunately, these
goals are in conflict. In a luxury sedan the suspension is usually designed with an
emphasis on comfort, but the result is a vehicle that rolls and pitches while driving
and during turning and braking. In sports cars, where the emphasis is on control, the
suspension is designed to reduce roll and pitch, but comfort is sacrificed.
2.1.2 Main Objectives Of The Suspension
1] To prevent the road shocks from being transmitted to the vehicle parts, thereby
providing suitable riding and cushioning effect to the occupants.
2] To keep the vehicle stable while in motion by providing good road holding during
driving cornering and braking.
3] Provides safe vehicle control and free of irritating vibrations and reduce wear and
tear.
3. SIGNIFICANT ADVANCEMENT
The Bose suspension required significant advancements in four key disciplines:
1] Linear electromagnetic motors.
2] Power amplifiers.
3] Control algorithms.
4] Research vehicles.
Bose took on the challenge of the first three disciplines, and bet on developments that
industry would make on the fourth item. Prototypes of the Bose suspension have been
installed in standard production vehicles. These research vehicles have been tested on.
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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Fig 3.1: parts of suspension system
3.1 Linear Electromagnetic Motor
A linear electromagnetic motor is installed at each wheel of a Bose equipped vehicle.
Inside the linear electromagnetic motor are magnets and coils of wire. When electrical
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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power is applied to the coils, the motor retracts and extends, creating motion between
the wheel and car body. One of the key advantages of an electromagnetic approach is
speed.
The linear electromagnetic motor responds quickly enough to counter the effects of
bumps and potholes, maintaining a comfortable ride. Additionally, the motor has been
designed for maximum strength in a small package, allowing it to put out enough
force to prevent the car from rolling and pitching during aggressive driving
maneuvers.
3.2 Power Amplifier
The power amplifier delivers electrical power to the motor in response to signals from
the control algorithms. The amplifiers are based on switching amplification
technologies pioneered by Dr. Bose at MIT in the early 1960s – technologies that led
to the founding of Bose Corporation in 1964.
The regenerative power amplifiers allow power to flow into the linear electromagnetic
motor and also allow power to be returned from the motor. For example, when the
Bose suspension encounters a pothole, power is used to extend the motor and isolate
the vehicle’s occupants from the disturbance. On the far side of the pothole, the motor
operates as a generator and returns power back through the amplifier. In so doing, the
Bose suspension requires less than a third of the power of a typical vehicle’s air
conditioning system.
3.3 Control Algorithms
The Bose suspension system is controlled by a set of mathematical algorithms
developed over the 24 years of research. These control algorithms operate by
observing sensor measurements taken from around the car and sending commands to
the power amplifiers installed in each corner of the vehicle.
The goal of the control algorithms is to allow the car to glide smoothly over roads and
to eliminate roll and pitch during driving.
3.4 Research Vehicle
In many of today’s production vehicles, the suspension system is comprised of front
and rear suspension modules that bolt to the underside of the vehicle. The Bose
suspension takes advantage of this configuration by creating replacement front and
rear suspension modules.
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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5. Savitribai Phule Pune University
Using this approach, the research team has been able to retrofit the Bose suspension
into existing production vehicles with minimal modifications. Bose’s front suspension
modules use a modified McPherson strut layout and the rear suspension modules use
a double-wishbone linkage to attach a linear electromagnetic motor between the
vehicle body and each wheel. Torsion springs are used to support the weight of the
vehicle. In addition, the Bose suspension includes a wheel damper at each wheel to
keep the tire from bouncing as it rolls down the road.
Unlike conventional dampers, which transmit vibrations to the vehicle occupants and
sacrifice comfort, the wheel damper in the Bose suspension system operates without
pushing against the car body, maintaining passenger comfort.
3.5 Challenges
Every automotive suspension has two goals: passenger comfort and vehicle control.
Isolating the vehicle’s passengers from road disturbances like bumps or potholes
provides comfort. Control is achieved by keeping the car body from rolling and
pitching excessively, and maintaining good contact between the tire and the
road.Unfortunately, these goals are in conflict.
In a luxury sedan the suspension is usually designed with an emphasis on comfort, but
the result is a vehicle that rolls and pitches while driving and during turning and
braking. In sports cars, where the emphasis is on control, the suspension is designed
to reduce roll and pitch, but comfort is sacrificed. Bose engineers took a unique
approach to solving this problem, and the result is an entirely new approach to
suspension design.
3.6 Solution
In 1980, Bose founder and CEO Dr. Amar Bose conducted a mathematical study to
determine the optimum possible performance of an automotive suspension, ignoring
the limitations of any existing suspension hardware. The result of this 5-year study
indicated that it was possible to achieve performance that was a large step above
anything available.
After evaluating conventional and variable spring/damper systems as well as
hydraulic approaches, it was determined that none had the combination of speed,
strength, and efficiency that is necessary to provide the desired results.
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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The study led to electromagnetics as the one approach that could realize the desired
suspension characteristics.
Fig 3.2: Car with installed Bose electromagnetic suspension.
4. WORKING
The Bose system uses a linear electromagnetic motor (L.E.M.) at each wheel, in lieu
of a conventional shock and spring setup. The L.E.M. has the ability to extend (as if
into a pothole) and retract (as if over a bump) with much greater speed than a fluid
damper (taking just milliseconds). These lightning-fast reflexes and precise movement
allow the wheel's motion to be so finely controlled that the body of the car remains
level, regardless of the goings-on at the wheel level. The L.E.M. can also counteract
the body motion of a car while accelerating, braking and cornering, giving the driver a
greater sense of control and passengers less of a need for Dramamine. To further the
smooth ride goal, wheel dampers inside each wheel hub smooth out small road
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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imperfections, isolating even those nuances from the passenger compartment. Torsion
bars take care of supporting the vehicle, allowing the Bose system to concentrate on
optimizing handling and ride dynamics.
A power amplifier supplies the juice to the L.E.M.s. The amplifier is a regenerative
design that uses the compression force to send power back through the amplifier.
Thanks to this efficient layout, the Bose suspension uses only about a third of the
power of a vehicle’s air conditioning system. There are a few other key components
in the system, such as control algorithms that Bose and his fellow brainiacs
developed. .
Fig 4.1: Installed suspension unit in car
The different types of suspension system which are available are mentioned below:
4.1 Front Suspension
Solid I-Beam
It’s a Non-independent design .These is used on trucks and other large vehicles. Its
economical and simple .It has low maintenance but poor handling.
Twin I-Beam
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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Found on many Ford trucks. Its Forged, cast, or stamped axles. Has excellent load
capacity. It requires special equipment for alignment adjustments.
Mac Pherson Strut
One of the most popular systems .It has one Control Arm. Ideal for front wheel drive.
Light weight and economical. Good ride quality and handling characteristics. It’s used
for both front and rear suspensions.
Short-Long Arm
Independent design uses an upper and a lower control arm uses either torsion bars or
coil springs Good ride quality and handling characteristics Heavy and complex design
requires a lot of space.
4.2 Rear Suspension
Non Independent Rear Leaf Springs:
It’s a non-independent design Similar to front solid I-beam axle. Used for large load
carrying capacity.
Non Independent Rear Coil Springs:
It’s a non-independent design .Uses coils and control arms instead of leaf springs. Has
good load carrying capacity.
Trailing Arm:
It’s an Independent Design Uses individual lower control arms. Uses coil springs and
shocks for good ride quality.
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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Fig 4.2: suspension in front wheel
The Bose suspension system installs easily into the front of the vehicle. A new engine
cradle connects the front suspension to the car body using the original factory
mounting hardware, creating a drop-in replacement module. Bose's front suspension
modules use a modified Mac Pherson strut layout and the rear suspension modules
use a double-wishbone linkage to attach a linear electromagnetic motor between the
vehicle body and each wheel. Torsion springs are used to support the weight of the
vehicle.
In addition, the Bose suspension includes a wheel damper at each wheel to keep the
tire from bouncing as it rolls down the road. Unlike conventional dampers, which
transmit vibrations to the vehicle occupants and sacrifice comfort, the wheel damper
in the Bose system operates without pushing against the car body, maintaining
passenger comfort.
4.3 Linear Motor
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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10. Savitribai Phule Pune University
Fig 4.3: linear motor
Linear motor is essentially a multi-phase alternating current (AC) electric motor that
has had its stator "unrolled" so that instead of producing a torque (rotation) it
produces a linear force along its length. The most common mode of operation is as a
Lorentz-type actuator, in which the applied force is linearly proportional to the current
and the magnetic field (F = qv × B).
Many designs have been put forward for linear motors, falling into two major
categories, low-acceleration and high-acceleration linear motors. Low-acceleration
linear motors are suitable for maglev trains and other ground-based transportation
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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11. Savitribai Phule Pune University
applications. High-acceleration linear motors are normally quite short, and are
designed to accelerate an object up to a very high speed and then release the object,
like roller coaster.
They are usually used for studies of hypervelocity collisions, as weapons, or as mass
drivers for spacecraft propulsion. The high-acceleration motors are usually of the
linear induction design (LIM) with an active three-phase winding on one side of the
air-gap and a passive conductor plate on the other side.
The low-acceleration, high speed and high power motors are usually of the linear
synchronous design (LSM), with an active winding on one side of the air-gap and an
array of alternate-pole magnets on the other side. These magnets can be permanent
magnets or energized magnets. The Transrapid Shanghai motor is an LSM.
Fig 4.4: Bose suspension system
5. COMPARISON
5.1 On A Bumpy Surface
Two vehicles of the same make and model are driven over a bump course at night.The
vehicle on the top has the original factory installed suspension and the vehicle on the
bottom has a BOSE suspension system.
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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Fig 5.1: A Lexus with a standard suspension
Joggles as it coasts along a bumpy surface, while another Lexus with the BOSE
suspension system (below) sails along the same road unperturbed.
Fig 5.2: A Lexus with a BOSE suspension
5.2 Body Roll While Cornering
Two vehicles of the same make and model are shown performing an aggressive
cornering maneuver.
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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Fig 5.3: A Lexus with a standard suspension
Fig 5.4: A Lexus with the BOSE suspension
In the photo, the Lexus car without the BOSE system leans as it turns a corner, while
the car with the Bose system remains stable.
Body Pitch on braking & accelerating: The front end of the car dips when the driver
of a Lexus fitted with the standard factory fitted suspension system slams brakes. In a
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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Lexus with the BOSE suspension system; drivers quickly notice the elimination of
body pitch during hard braking and acceleration. Professional test drivers have
reported an increased sense of control and confidence resulting from these behaviors.
Fig 5.5: Comparison at cornering.
6. VEHICLE PERFORMANCE
Vehicles equipped with the Bose suspension have been tested on a variety of roads
and under many different conditions, demonstrating the comfort and control benefits
drivers will encounter during day to-day driving. In addition, the vehicles have
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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undergone handling and durability testing at independent proving grounds. When test
drivers execute aggressive cornering maneuvers like a lane change, the elimination of
body roll is appreciated immediately. Similarly, drivers quickly notice the elimination
of body pitch during hard braking and acceleration.
Professional test drivers have reported an increased sense of control and confidence
resulting from these behaviors. When test drivers take the Boss suspension over
bumpy roads, they report that the reduction in overall body motion and jarring
vibrations results in increased comfort and control.
7. FEATURES
1] The system draws about two horsepower or one-third the load of a typical air
conditioner. While it can exert 50 kilowatts (67 horsepower) of energy to leap a
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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2x6(plank) covers 49 kilowatts cushioning the landing, with the shocks working like
generators.
2] Torsion bars and shock units weigh about what two conventional springs and
shocks. The controllers and upsized alternator also add some weight, but the total
should be less than that of a hydraulic active suspension.
3] The system lets a vehicle ride lower at highway speeds to produce less drag and
improve handling.
4] To save power the system is regenerative. When the far side of a pothole helps to
push the wheel up almost all the power is recovered. The motors momentarily become
generators, shunting the recovered energy to storage, either in the engine battery or in
some other device. The system ends up consuming one-third of the energy used by a
cars air-conditioner.
8. DISADVANTAGES
Every system has some disadvantages attached to it.Some of the drawbacks can be
grouped as below.
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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The main drawback of the system is the cost.As it uses nyodinium magnets which are
costly to manufacture. Thus this makes this suspension system costlier than any other
suspension available.Thus this system can be seen in only high end cars.
1] The second drawback is ,when this system breakdowns its very difficult and costly
affair to repair it .The other system available can be easily be repaired.
2] The system is very complex and requires high precision machinery and skilled
workers to manufacture.
9. FUTURE PROSPECTS
Dr. Bose stated that within five years the company hopes to have the Bose suspension
offered on one or more high-end luxury cars, and thanks to the system's modular
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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design, it shouldn't be much of a problem to install at the factory. A manufacturer will
be chosen to co-develop a production application for sale after three or four years.
GM is expected to be the first development partner, given the long relationship
between the companies. The biggest setback would be the cost as it is going to cost
more than any suspension does now. The neodymium iron in the magnets is the most
expensive part. Expect to see electromagnetic suspensions only on very expensive
cars first, and probably never on cheap ones, though we imagine that the cost would
come down as production goes up.
10. CONCLUSION
For the first time, the Bose suspension demonstrates the ability to combine in one
automobile a much smoother ride than any luxury sedan, and less roll and pitch than
Government College Of Engineering And Research, Awasari, Mechanical Engineering
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any sports car. This performance results from a proprietary combination of suspension
hardware and control algorithms.
11. REFERENCE
1]“ElectromagneticSuspensionSystems”,http://www.bose.com/learning/project_sound
/bose_suspension.jsp.
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2]“Bose Redefines Automobile Suspension System”, S.R.Gupta, Penguin metro
reads.
3]“Electronic Suspension” , U.V.Bakshi.
4]“Future of Car Suspensions”, J.K.Thomson.
5]“Motorcycle dynamics” by Cossalter.
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