Mechanical System Design

Mechanical System Design2014-15

A Case Study On Aesthetic And Ergonomic Considerations In Four Wheeler (Aston Martin DB9) Car Sr. No.NameRoll No.

1Suraj Sanjay Jere 12

2Namdev Dattatray Bhopale5

3Raju Ishwar Kamble14

4Gajanan Anant Gurav10

5Vinayak Ramchandra Kasture15

1. Introduction:The Aston Martin DB9 is a car that creates a physical ache of envy. It's effortlessly beautiful, still reasonably rare and is a car that's far from an obvious choice. All of these factors have boosted its desirability and make well looked after used examples worth tracking down. It's a car at a vintage stage in the company's development, retaining a lot of character of the older Astons but adding a welcome dose of quality control and 21st century technology.

Fig. : 1SPECIFICATIONS

Dimensions And Weight:Weight:

3968 lbs (1800 kg)

Length:

185.4 in.

Width:

73.8 in.

Height:

50.0 in.

Wheelbase:

108.1 in.

Front Track:

62.0 in.

Rear Track:

61.5 in.

Drag Coefficient:

0.35

Body Style: `

CoupeSize:

Midsize

Market Segment:

Luxury

Passenger capacity

4Doors 2

Engine and TransmissionFuel Type:

Petrol Engine Type:

5.9L V12Maximum Power:

510bhp @ 6500 rpm Maximum Torque:

620Nm@ 5500 rpm

Maximum Speed

295Km/hr

Acceleration:

0-100 km/h in 4.6 secondsTransmission:

6-Speed Automatic

Highway Fuel Economy:

5 km /ltr. (approx.)

Wheels:Front:

19" Aluminum

Front Tyres:

235/40 ZR19

Rear:

19" Aluminum

Rear Tyres:

275/35 ZR19Chassis

Layout:

Rear Wheel Drive

Front Suspension:

Double Wishbone

Rear Suspension:

Double Wishbone

2. Aesthetic considerations:2.1 Form (Shape)

Make an emphatic sporting statement with exposed Carbon-Fibre highlights. The Coupes side profile is clean and distinctive, with a single-sweep roofline that flows through to a distinctive tail. Key Aston Martin design elements include the distinctive grille, metal side strakes, signature rear window shape and wide, curvaceous haunches. Aston Martin very fast, so it needs to be aerodynamically efficient The exhaust silencer is aerodynamically shaped to help achieve high speed.

Fig: 2.12.2 Symmetry and Balance:-

The car body is symmetrical about longitudinal axis and centrally balanced

Fig.: 2.22.3 Color: This car is available in different colors to attract the different customers. Available different colors are as shown below:-

2.4 Continuity:

The main feature of car body is to attract the customers. Appearance of Aston Martin is classical like a Coupe car which is different from todays modern cars attracts the people due to its road presence. The car body gives Luxurious look.

2.5 VariantsDB9 Volante:The Aston Martin DB9 Volante is the convertible version of the DB9 coupe. The chassis, though stiffer, uses the same base VH platform. To protect occupants from rollovers, the Volante has strengthened the windshield pillars and added two pop-up hoops behind the rear seats. The hoops cannot be disabled and will break the car's rear window if deployed. In an effort to improve the Volante's ride while cruising, Aston Martin have softened the springs and lightened the anti-roll bars in the Volante, leading to a gentler suspension. The retractable roof of the Volante is made of folding fabric and takes 17 seconds to be put up or down. The Volante weighs 59 kilograms (130 pounds) more than the coupe.DB9 LM:The DB9 LM comes standard with the DB9's optional sports pack and is only available as a semi-automatic coupe. The LM is painted Sarthe Silver, named after the Circuit de la Sarthe, where Le Mans is run, and has red brake calipers, a chromed mesh grill, and a special black leather interior, with red stitching and the Le Mans track stitched on the central consol. The car is also fitted with the DBS clear rear lights.

DB9 Carbon Black:The DB9 Carbon Black, as its name suggests, has a black paint finish and matching interior. This includes a black center console and interior door handles on the inside, and black grills, a black tailpipe, and black 483mm (19in) 10-spoke wheels on the outside. The interior also has numerous add-ons to make the car more sporty, including silver stitching for the leather and a polished glass gear stick. The exhaust has been modified to create a different sound to add to the sporty feel. The Carbon Black is only available as a six-speed semi-automatic.

DB9 Volante

DB9 LM

DB9 Carbon BlackFig.: 2.52.6 Proportion:

The Weight of car is balanced on four wheels. The position of head lights tail lights and sides mirrors are parallel to each other. Head lights and tail lights are so elongated that they became proportional to its design. It has adopted the coupe's sharpened and elongated front lights, LED markers and daytime running lamps, along with its gaping lower intake with a carbon-fiber front splitter. The lower rear fascia is also nearly identical, with a more prominent lower diffuser styled to emphasize its aggressiveness.2.7 Interior:

Fig.: 2.7 Full grain leather interior

Walnut facia trim

Iridium Silver centre console outer finish and Graphite inner finish

Auto-dimming interior rear-view mirror1

Auto-dimming interior rear-view mirror with garage door opener (USA and Canada only)

Electrically operated seats

Memory seats and exterior mirrors (three positions)

Dual-stage driver and front passenger frontal airbags

Front occupant side airbags

Automatically deployed roll-over bars (Volante)

Heated front seats

Heated rear screen

Automatic temperature control

Organic Electroluminescent (OEL) displays

LED map lamps and ambient lighting

Hard Disk Drive (HDD) satellite navigation1,2

Bluetooth telephone preparation1

Satellite radio system (USA only)

Power fold exterior mirrors

Rear parking sensors

Tyre-pressure monitoring1

Alarm and immobiliser

Remote-control central door locking and boot release

Tracking device3 (UK only)

2.8 Exterior:

Make an emphatic sporting statement with exposed Carbon-Fibre highlights. Aston made minor changes to the bodywork, including enlargening the recessed headlight clusters with bi-xenon lights and LED daytime strips, widening the front splitter, updating the grille and side heat extractors, updating the LED rear lights with clear lenses and integrating a new rear spoiler with the boot lid.

Fig.: 2.8.1

Fig.: 2.8.2

3. Ergonomic consideration:

3.1 Display & Controls:

All controls are within easy reach. The highly intuitive Touchtronic 2 transmission is operated via simple, dashboard-mounted buttons, flanking the docking station for the ECU. A combination of solid aluminium dials and chromed buttons operate the DB9s audio systems, Bluetooth telephony and hard-disk based navigation, while a classic analogue clock is placed at the heart of the console. DB9 Volante shown with optional Bang & Olufsen Beosound Audio System and Nexus Alloy facia trim. Raise the centre armrest and youll find a space to store your iPod, iPhone or any telephone or MP3 device. All MP3 player functions are duplicated on the DB9s dashboard screen, alongside mobile phone functions.

All Audio System andNexus Alloy facia trim.Fig.: 3.1

3.2 Gear Shift Paddle:

Aston Martin has "Semi-automatic transmissions", where the driver does not need to change gears at all, operating in the same manner as a conventional type of automatic transmission by allowing the transmission's computer to automatically change gear.

Two paddles are located behind the steering wheel for changing gears. One paddle is located behind the right side of the steering wheel and the other paddle is on the left side behind the steering wheel. The one on the right is marked + for shifting up a gear and the one on the left is marked for shifting a gear down. Paddle shift is a smooth and fast way of changing gears without having to take your hands off the steering wheel and using your left leg to depress the clutch. The gear changes are also much faster than that of a conventional manual gearbox. Many sports cars and race cars are equipped with paddle shift gearboxes for seamless gear changes that result in a continuous surge of acceleration which reduces acceleration timings of a car.

Fig.: 3.2

3.3 Work environment 1. NoiseCar creates low noise & smooth sport car firing. The engine is tuned specifically by Aston Martin sound engineers to make for the best driving experience, ensuring audibility that never becomes overpowering. Coupled with the unparalleled quality of the Bang & Olufsen sound system both driver and passenger enjoy beautiful sounds, whatever the source.2. VibrationCar has provided good suspension and high technology double wishbone shock absorber gives special comfort. A three stage adaptive damping system (ADS) is provided as standard Equipment with Normal, Sport and Track modes.3. HumidityIt has air conditioning which control humidity temperature with good circulation. 4. TemperatureThe DB9 has temperature control automatic. It helps to maintain the temperature inside the car. Rear screen is heated to remove moisture.5. LighteningHigh range of head light with variable intensity. It also have a LED light, LED indicator Interior light is automatic control.

References:http://www.astonmartin.com/ar/cars/the-new-db9http://en.wikipedia.org/wiki/Aston_Martin_DB9http://www.cardekho.com/aston-martin/aston-martin-db9-colors.htmlhttp://www.autocarindia.com/Search/Default.aspx?q=aston%20martin%20db9A Case Study of Aesthetics and Ergonomics of Four Wheeler carPage 13