Powertrain and suspension layout of Nissan GTR
- 1. POWERTRAIN AND SUSPENSION LAYOUT NISSAN GT-R (2015)
- 2. POWERTRAIN - SPECIFICATIONS POWERTRAIN Drivetrain All Wheel Drive Transmission Type 6 – Speed Transmission Control Auto – Shift Manual with Overdrive First Gear Ratio 4.06:1 Second Gear Ratio 2.30:1 Third Gear Ratio 1.60:1 Fourth Gear Ratio 1.25:1 Fifth Gear Ratio 1.00:1 Sixth Gear Ratio 0.80:1 Final Drive Axle Ratio 3.70:1 In figure: 2015 Nissan GT-R Nismo Chassis Front end - Engine |Rear end - Transmission, Differential and Transfer case
- 3. ALL WHEEL DRIVE MODE ENGINE TO TRANSFER CASE TRANSFER CASE TO TRANSAXLE TRANSAXLE TO REAR DIFFERENTIAL TRANSAXLE TO TRANSFER CASE TRANSFER CASE TO FRONT DIFFERENTIAL ENGINE TO TRANSFER CASE TRANSFER CASE TO TRANSAXLE TRANSAXLE TO REAR DIFFERENTIAL NORMAL DRIVING MODE - RWD FRONT DIFFERENTIAL • The Front Differential is an open differential. • Open Differential transfers torque to the wheel which has least resistance REAR DIFFERENTIAL • The Rear Differential is a limited slip differential. • Unlike open differential, it transfers torque to the wheel which has more traction 200 milliseconds Time taken to shift gear
- 4. ATTESA E-TS Advanced Total Traction Engineering System for All-terrain with Electronic Torque Split • GT-R ATTESA E-TS uses two almost parallel driveshafts, with a second driveshaft running slightly to the right of the main driveshaft and engine sending power exclusively to the front wheels through an open differential. • The main driveshaft, goes from the engine to the rear-based gearbox, from where it sends power through a limited slip differential to the rear wheels, therefore varying the left/right torque split at the rear axle. • Integrated into the double-clutch gearbox there's a transfer case in which, instead of a center differential lies a center wet multi-plate clutch system.
- 5. POWERTRAIN - FEATURES In figure: GR6 Dual Clutch Transmission Manufactured by Borg – Warner Inc. Transmission. Includes dual-clutch module, clutch-control, shift-actuation systems, and synchronizer assemblies
- 6. 1. Drive Torque 2. First Gear Engaged 3. Second Gear Engaged GR6 TRANSMISSION - WORKING 1. A dual-clutch automated manual transmission has two wet computer-controlled clutches (wet clutch means the friction plates are immersed in transmission fluid). 2. One clutch controls odd gears (1,3,5); the other clutch controls even gears (2,4,6). 3. When the car starts in the first gear, the second gear is already pre-shifted and as soon as the car reaches the speed suitable for the second gear, the odd-gear clutch disengages the first gear and almost simultaneously the even-gear clutch engages the second gear. 4. Similarly, with the next 2-3 gear shift and so on. 5. All this is done to minimize time and torque loss between gear shifting. In Figure: Manual Transmission Torque Output In Figure: Dual Clutch Torque Output
- 7. TRANSFER CASE In figure: Borg Warner Torque on Demand Transfer Case Instead of a central differential lies a wet multi-plate clutch system. • TOD control unit automatically tailors torque distribution to road, offering full time four wheel drive. TOD distributes electronically-controlled power into front and rear wheels whose ratio change from 0:100 to 50:50 complying with wheel speed differences. 4H MODE 4H is the normal operating mode when drive of which gear ratio is 1:1 4L MODE 4L mode distributes power to front and rear wheels 50 : 50 of which gear ratio is 2.48:1.
- 9. BILSTEIN B4 DAMPTRONIC SUSPENSION SYSTEM • Sensors detect acceleration and braking, lane changes and road surface conditions and adjust the shock absorbers accordingly in mere milliseconds. In figure: Bilstein B4 Damptronic Suspension System Active Suspension System to provide better road contact at higher acceleration as well for comfortable ride during touring COMFORT NORMAL SPORT
- 10. REAR SUSPENSION – MULTI LINK SUSPENSION • A Multi-link suspension is a type of vehicle suspension design which uses three or more lateral arms and one or more longitudinal arms. • In order to simplify understanding, it is usual to consider the function of the arms in each of three orthogonal planes. Advantages • It is possible to alter one parameter in the suspension at a time, without affecting anything else. • This is in direct contrast to the double wishbone suspension, where moving a hard point will affect two or more parameters Disadvantages • Multi – link suspension is costly and complex. • Suspension tuning requires 3D CAE Analysis Software
- 11. FRONT SUSPENSION – DOUBLE WISHBONE TYPE • Each wishbone, which has two mounting positions to the frame and one at the wheel, bears a shock absorber and a coil spring to absorb vibrations. • Double-wishbone suspensions allow for more control over the camber angle of the wheel, which describes the degree to which the wheels tilt in and out. • They also help minimize roll or sway and provide for a more consistent steering feel. • Allows the spindles to travel vertically up and down. When they do this, they also have a slight side-to-side motion caused by the arc that the wishbones describe around their pivot points. This side-to-side motion is known as scrub.
- 12. SEATING • The 2015 Nissan GT-R seats four and comes standard with eight way power adjustable passenger seat and heated front seats. • The front seats offer a high seating position, excellent long distance comfort and are easier to get into and get out of than in most competing sports cars. • The cabin is small but the adjustable front seat and steering wheel makes it comfortable for tall occupants. • The rear seats cannot give a comfortable ride to the occupants as it is cramped. • The space available for cargo is 8.8 cubic feet
- 13. MEASUREMENTS INTERIOR MEASUREMENTS (in inches) Front Head Room 38.1 Front Hip Room 54.7 Front Leg Room 44.6 Front Shoulder Room 54.3 Rear Hip Room 44.9 Rear Head Room 33.5 Rear Leg Room 26.4 Rear Shoulder Room 50.0 EXTERIOR MEASUREMENTS (in inches) Total Length 183.8 Total Width 74.6 Total Height 53.9 Front Track 62.6 Rear Track 63 Wheelbase 109.4 • The Nissan GT-R uses premium front midship configuration for positioning the engine inside the vehicle. • The term midship means that the engine’s centre of mass is displaced from the front axle centre line into the cabin. • This reduces the sprung mass on the front suspension as well as offers better load distribution