PEUGEOT SUSPENSION

PEUGEOT 407 SUSPENSION

Multi-link arm suspension by Peugeot 407

The first time in Peugeot's history they have decided to opt for a double wishbone suspension unit on the 407's front axle. On the rear axle, the latest generation multi-arm suspension still features dampers that are, in Peugeot tradition, inclined rearwards to optimize boot space.  Based on a structure exhibiting a high tensional rigidity, the choice fell naturally therefore on two high-tech architectures with the generous use of lightweight materials on a dual wishbone front axle with drop link, and on an integral multi-arm rear suspension with inclined spring/damper assemblies. 

The various constituent parts of the suspension and their functional criteria were not compromised in any way. Compared to the first generation multi-arm rear suspension that made its appearance on the 406, the all-new rear suspension of the 407 differs essentially by the inclusion of inclined spring/valve damper assemblies (more compact) and of a longitudinal arm decoupled from the hub carrier to ensure longitudinal operation only (absence of extraneous forces generating vibrations). 

Launched in 2005, the Peugeot 407 Coupe is the latest in a long tradition of prestige coupes produced by Peugeot, where style plays a key role, combining stature and refinement to create a product capable of long-distance touring with comfort and high performance development.

This stature is expressed initially through the coupe’s suspension dynamics, with dual wishbone and a drop link at the front and multi-arm rear suspension: the Peugeot 407 coupe produces’ superb road holding, is acknowledged for its grip, progressive control, dynamics and ride comfort.

2011 HONDA ACCORD

SUMMARY OF 2011 HONDA ACCORD

The 2.4-liter, 16-valve DOHC i-VTEC in-line 4-cylinder engine in the Honda in Denver is nothing short of impressive: it produces 177 horsepower and 161 pound-feet of torque. Depending upon the selected body style and/or trim, one can also get a 3.5-liter V6 that’s good for 271 hp, in addition to 254 lb-ft. of torque. In a famous performance test near the Denver, Colorado area a Honda in Denver V6 sedan was clocked at going from 0 to sixty mph in seven seconds. The manual coupe made the same claim in 6.3 seconds!

The 2.4-liter, 16-valve DOHC i-VTEC in-line 4-cylinder engine in the An online poll of Denver customers ranking the effectiveness of the Accord features revealed many favorites connected to the suspension. Another popular feature was the gas mileage. The sedan alone achieves an EPA-estimated 20/30/24, while the coupe receives 19/28/22 (automatic) and 17/26/21 (manual). This car also has excellent stability and traction control, a Drive-By-Wire Throttle System, Variable Cylinder Management (VCM) and Active Noise Cancellation (ANC). In addition, the CARB emission has a respectable ULEV-2 rating.

HONDA ACCORD 2011 SUSPENSION

The 2011 Honda Accord suspension system contains lots of goodies that just happen to be standard on all of the models. It all starts with a base of unit-body construction, a front shock tower bar, stabilizer bar, Variable Gear Ratio (VGR) power-assisted rack-and-pinion steering, lock-to-lock steering wheel turns and a curb-to-curb turning diameter. The advanced Double Wishbone front suspension utilizes both upper and lower control links. This grants Honda in Denver engineers a much-desired flexibility to tune the suspension for predictable cornering as well as emergency maneuvering. The result is an ultra-smooth, stable ride. The independent multi-link rear suspension definitely provides high lateral rigidity for more spirited handling. Experience the comfort of the Honda Accord for yourself at the State Wide Buyback Event at Kuni Honda.

The 2011 Honda Accord is such a classy and sophisticated model with lots of features for both the driver and passengers to enjoy. With a refined exterior and solid, innovative technology to support the interior, it’s no wonder that this is one of Honda’s best cars in terms of selling quantity and quality. A solid suspension system only enhances this car’s outstanding reputation for safety and overall smart driving performance.

HONDA ACCORD

SUMMARY OF HONDA ACCORD

The 2010 Honda Accord Crosstour leverages the benefits of a premium chassis design for rewarding and sophisticated handling dynamics. A double-wishbone front suspension and multi-link rear suspension allow for both a smooth ride and world-class levels of performance that is equally at home on a curvy road, long stretches of interstate highway or in inclement weather. Ground clearance of 6.0 inches enhances capability in snowy conditions and broadens access to more roads off the beaten path. Standard features include Vehicle Stability Assist™ (VSA™), commonly referred to as Electronic Stability Control; 4-wheel disc brakes; and stabilizer bars front and rear.

  Accord Crosstour Chassis Highlights :

• ·         Double wishbone front suspension
• ·         Multi-link rear suspension
• ·         Vehicle Stability Assist
• ·         4-wheel disc brakes
• ·         6.0 inches of ground clearance
• ·         Front and rear stabilizer bars

Front Subframe
A front "floating" subframe design is used on the Accord Crosstour. A welded-steel subframe secured to the unit body's longitudinal rails supports the Accord's engine, transaxle, transfer case, steering gear and front suspension. The front of the subframe assembly is designed for enhanced stiffness with minimal weight penalties and uses four tuned rubber mounts to isolate the subframe from the main body structure, i.e. it is "floating."

A stiffener located under each subframe attachment fastener helps to further stabilize the assembly, thereby achieving linear handling and braking performance. The subframe includes two Active Control Engine Mounts (ACM) that counteract the inherent vibration created by the Variable Cylinder Management (VCM) system, plus one rubber isolator transmission mount. (See the body section for more details on ACM). The "floating" mounts are strategically positioned to counteract noise and vibration while reducing the transmission of engine noise and vibration to the passenger compartment.

Double Wishbone Front Suspension
Widely spaced upper and lower wishbones give precise suspension action, with the coil-over spring and shock absorber units free of the binding caused by the side-loading inherent in some less sophisticated strut-type designs. The Accord Crosstour's front suspension is a modified version of the double-wishbone system used on the Accord Sedan and Coupe. Stabilizer bars, springs and damping rates have been optimized to provide the best combination of ride and handling. The front lower control arms are forged steel and connect to a stamped steel box-section sub frame. The stamped-steel upper control arms connect to a forged-steel knuckle.

Progressive valve nitrogen gas-filled coil-over shock absorbers integrate an internal rebound spring. When cornering, the internal rebound spring allows the shock absorber to exert additional force on the inside wheel's coil spring to help counteract wheel lift in certain situations. This premium shock absorber design helps to improve both ride comfort and responsiveness. Ultimately, tire-to-road adhesion is enhanced.

2010 Honda Accord Crosstour front double wishbone suspension

Rear Subframe
The rear subframe, which supports most of the rear suspension and the rear axle drive unit, is made of high-strength steel for high stiffness and minimal weight. The shape of the rear subframe is equally important - it must accommodate the drivetrain components for the available Real Time 4WD system and the multi-link rear suspension. For excellent ride and handling characteristics, the subframe attaches to the unit body at four widely spaced, rubber-isolated, mounting points. Rear-suspension components, especially the springs and shock absorbers, are as compact as possible to facilitate a wide, flat, load floor and to leave room for both a spare tire and a fuel tank. The rear axle drive unit (if equipped) is mounted to the subframe by means of rubber isolators to block powertrain noise and vibration from the passenger compartment.

Multi-link Rear Suspension
The Accord Crosstour's rear suspension is a compact, multi-link layout for excellent ride and handling, minimum weight and optimum packaging. Wheel travel is a generous 4.3 inches in compression and 3.7-inches in rebound. The three links that position each rear wheel laterally run between the knuckle assembly and the subframe. Progressive valve nitrogen gas-charged shock absorbers attach from a low point on each knuckle to a highly rigid attachment point on the unit body.

2010 Honda Accord Crosstour rear multi-link suspension

The knuckles are an "in-wheel" design to optimize suspension geometry and packaging efficiency. Bushing compliance provides a modest toe-in effect in response to substantial cornering and braking loads to enhance overall stability. The rear knuckles are made from aluminum and help to reduce unsprung weight for quick suspension responsiveness. Optimized high rigidity bearings accommodate the additional forces of the four-wheel-drive system. Coil springs, dampers and a stabilizer bar are tuned for the best combination of ride and handling. Rear subframe mounts and lateral control link bushing rates were adjusted to create a discrete level of lateral force steer at the rear axle.

VIDEO OF HONDA ACCORD SUSPENSION

2013 Audi A6 Allroad quattro - Adaptive Air Suspension

AUDI SUSPENSION SYSTEM

Pneumatic Adjustable Audi Allroad Air Suspension

This type of suspension was used by AUDI car manufacturer in AUDI ALLROAD QUATTRO car.

Audi Allroad air suspension system consists of air bags that surround the shock absorbers instead of conventional coil springs. The adjustable Allroad air bag compression is managed by a control module and air compressor that are delivered via air lines. This type of Audi Allroad suspension set-up allows for variable suspension feel and height. 

This was the latest type of suspension for the AUDI car.

The suspension adjust it own height depend on the speed of the car. 

The suspension height is higher when the car are in slow speed (below than 35km/h). 

The suspension height decreases as the speed increases. 

  

SUSPENSION SYSTEM OF AUDI TT (FRONT AXLE) (2)

Wishbones, ball joint and bracket

The ball joint is connected to the wishbone at three bolting points. compared to the Audi A3, 

the fastening bolt are integral part of a separate retaining element. the bolts and retaining 

element are inserted from above through the wishbone and ball joint. the wishbone is attached 

directly to the subframe at the inside front and to the body at the inside rear by means of an

 aluminium bracket.

The ball joint is in a lower position then on the Audi A3. The result is a higher centre of roll. 

this improves roll stabilization and gives particularly sport handling. the centre of roll is the 

level with the front axle in the centre of the vehicle about which the body pivots when subjected

 to lateral forces,e.g. when cornering.

Anti-roll bar


A tubular anti-roll bar is used on models with front wheel drive, while a solid bar is used on 

quarrto models. The link rod is a carry over part from the Audi A3.

SUSPENSION SYSTEM FOR AUDI TT (FRONT AXLE)

AXLES


Front Axle 
Overview

An improved version of  the McPherson suspension is employed. The design of the front axle is identical to that of the Audi A3. Track width is 13mm wider on each side than the Audi A3. Detail modifications have been made to reflect the particularly sporty character of the Audi TT. In addition to the tuning parts (springs, dampers and antirool bars), the same axle components are used in all TT suspension variants.

System Components
Subframe

The aluminium subframe bears the wishbones, the anti roll bar and steering gear of electromechanical steering system. the two brackets for mounting the wishbones are now common part. the Audi TT is living proof thant sportiness and lightweight design go hand in hand. the illustration shows the aluminium components of front axle.

Swivel Bearing, Wheel Bearing
The aluminium swivel bearing manufacturing using Cobapress technology is a new part its geometric design allows a wider track width to be achieved. stell bruhes are press fitted into the swivel bearing at the track rod and ball joint mounting points. the third generation wheel bearing is bolted to the swivel bearing. the wheel bearing are carry-over part from the Audi A3. The screws are now coated with a chomium 6 free material to protect the environment. the suspension strut is connected to the swivel bearing by a clamp coupling.

Group Task

As the first semester student that taking Automotive Engineering Fundamental subject, we from group 9 are given task to research and studied about latest suspension system of international car manufacture company.

The three company that selected by our group was :

HISTORY OF SUSPENSION

Automobiles were initially developed as self-propelled versions of horse-drawn vehicles. However, horse-drawn vehicles had been designed for relatively slow speeds, and their suspension was not well suited to the higher speeds permitted by the internal combustion engine.

In 1901 Mors of Paris first fitted an automobile with shock absorbers. With the advantage of a dampened suspension system on his 'Mors Machine', Henri Fournier won the prestigious Paris-to-Berlin race on 20 June 1901. Fournier's superior time was 11 hrs 46 min 10 sec, while the best competitor was Léonce Girardot in a Panhard with a time of 12 hrs 15 min 40 sec.

In 1920, Leyland Motors used torsion bars in a suspension system. In 1922, independent front suspension was pioneered on the Lancia Lambda and became more common in mass market cars from 1932

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WHAT IS SUSPENSION ?

Suspension is the term given to the system of springs, shock absorbers and linkages that connects a vehicle to its wheels and allows relative motion between the two. Suspension systems serve a dual purpose for contributing to the vehicle's handling and braking for good active safety and driving pleasure, and keeping vehicle occupants comfortable and reasonably well isolated from road noise, bumps, and vibrations. These goals are generally at odds, so the tuning of suspensions involves finding the right compromise. It is important for the suspension to keep the road wheel in contact with the road surface as much as possible, because all the road or ground forces acting on the vehicle do so through the contact patches of the tires. The suspension also protects the vehicle itself and any cargo or luggage from damage and wear. The design of front and rear suspension of a car may be different.

POSITION OF MEMBERS

List name and duty

Mohamad Shahril bin Mat(leader)
Syed aidil hassani bin Sayed Hassan
Mumtaz binti Azman
(slide presentation)

Abd Munim bin Halim
Mohamad nor faiz bin Mohamad
Meor Azli bin Ismail
Mohamad Fakhrul izzat bin Abdul khir
(informations)

Muhammad Badri bin Ghozali
Syahidullah bin Ahmad Harazi
(report)

Atiqurahman bin Amran
Muhammad Aidiladha bin Ahmad
(blog)

Group Members

GROUP MEMBERS

1. SYED AIDIL HASSANI BIN SAYED HASSAN
2. ABD MUNIM BIN ABD HALIM
3. MOHAMAD SHAHRIL BIN MAT
4. MOHAMMAD NOR FAIZ BIN MOHAMMAD
5. MOHAMAD FAKHRUL IZZAT BIN ABDUL KHIR
6. MUHAMMAD AIDILADHA BIN AHMAD
7. MUMTAZ BINTI AZMAN
8. MUHAMMAD BADRI BIN GHOZALI
9. SYAHIDULLAH BIN AHMAD HARAZI
10. MOHAMAD AMIRUL BIN MOHMAD AKIL
11. MOHD FIRDAUS BIN ABDUL RAHIM
12. MEOR AZLI BIN ISMAIL
13. ATIQURAHMAN BIN AMRAN