Dual clutch transmission

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Presentation Transcript

DUAL-CLUTCH TRANSMISSION:

DUAL-CLUTCH TRANSMISSION BY MANOJ KUMAR G R

Contents:

Contents Introduction to Transmission Types of Transmission Dual-clutch Transmission Operation and Design Advantages of Dual-clutch Transmissions Conclusion 1 2 3 4 5 6

Introduction to transmission:

Introduction to transmission A transmission or gearbox provides speed and torque conversions from a rotating power source to another device using gear ratios. The function of any transmission is transferring engine power to the driveshaft and rear wheels Location

Need :

Need To adapt the output of the internal combustion engine to the drive wheels. To reduce the higher engine speed to the slower wheel speed. To supply high torque at low speeds.

Types of transmission:

Types of transmission Manual Semi-automatic Automatic Transmission

Manual Transmission:

Manual Transmission A conventional manual transmission is frequently the base equipment in a car. Also known as a manual gearbox or standard transmission. It generally uses a driver-operated clutch, typically operated by a pedal or lever, for regulating torque transfer from the internal combustion engine to the transmission, and a gear stick, either operated by hand (as in a car) or by foot (as on a motorcycle).

Simple Manual Transmission:

Simple Manual Transmission Main Components Layshaft Dog clutch Synchromesh Gear Selector Fork www.themegallery.com

Semi-automatic Transmission:

Semi-automatic Transmission A semi-automatic transmission is one that cannot change gears automatically but only half-automatically. This requires the driver to intervene in order to execute a gear change by moving a gear lever or pressing a clutch pedal or actuating a switch lever or other action. Types Dual-clutch Transmission Electrohydraulic Manual Transmission Saxomat Transmission Zero shift Transmission

Dual-clutch transmission:

Dual-clutch transmission Is a differing type of semi-automatic or automated manual automotive transmission. This type of transmission was invented by Frenchman Adolphe Kégresse. The first actual DCTs arrived from Porsche in-house development, for Porsche racing cars in the 1980s,when computers to control the transmission became compact enough. Dual-clutch transmissions that are currently on the market primarily use two oil-bathed wet multi-plate clutches.

Arrangement and Operation:

Arrangement and Operation A two-part transmission shaft is the heart of a DCT. The outer shaft is hollowed out, making room for an inner shaft, which is nested inside. The outer hollow shaft feeds second and fourth gears, while the inner shaft feeds first, third and fifth. It utilizes two separate wet clutches for odd and even gear sets. www.themegallery.com

Wet-clutch components:

Wet-clutch components www.themegallery.com

Advantages of Dual-clutch transmission:

Advantages of Dual-clutch transmission computers, solenoids and hydraulics do the actual shifting. Offers the most dynamic acceleration With up shifts taking a mere 8 milliseconds. Offers smooth acceleration by eliminating the shift shock that accompanies gearshifts in manual transmissions and even some automatics. Improved fuel economy when compared to manual transmission

Automatic transmission:

Automatic transmission An automatic gearbox is one type of motor vehicle transmission that can automatically change gear ratios as the vehicle moves. The predominant form of automatic transmission is hydraulically operated; using a fluid coupling or torque converter, and a set of planetary gear sets to provide a range of gear ratios.

Conclusion :

Conclusion Automobile industries today designing alternative transmission systems which Helps in increasing fuel efficiency. Minimizes the drag losses. Improves internal efficiency. Provides desired torque and speed.

Bibliography :

Bibliography www.howstuffworks.com www.wikipedia.org

Slide 16:

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