Automobile Engineering

CVT is an “infinite speed” transmission which can change step-lessly through an infinite number of effective gear ratios between maximum and minimum values. Unlike traditional automatic transmissions, continuously variable transmissions don’t have a gearbox with a set number of gears, which means they don’t have interlocking toothed wheels. The word gear in CVT refers to a ratio of engine shaft…

A sequential transmission is a type of transmission used on motorcycles and high-performance cars for auto racing, where gears are selected in order, and direct access to specific gears is not possible. Cars with SMTs have a manual transmission with no clutch pedal; the clutch is automatically engaged. In a race car, the motion of the…

A dual clutch transmission, commonly abbreviated to DCT uses two clutches, but has no clutch pedal. Sophisticated electronics and hydraulics control the clutches, just as they do in a standard automatic transmission. In a DCT, however, the clutches operate independently. One clutch controls the odd gears (first, third, fifth and reverse), while the other controls…

A semi-automatic transmission (also known as clutch less manual transmission, automated manual transmission, flappy-paddle gearbox, or paddle shift gearbox) is a system which uses electronic sensors, processors and actuators to execute gearshifts on the command of the driver. This removes the need for a clutch pedal which the driver otherwise needs to depress before making…

Both the automatic transmission and a manual transmission accomplish exactly the same thing, but they do it in totally different way. Advantages of manual transmission over automatic transmission- 1. It is easier to build a strong manual transmission than an automatic one. This is because a manual system has one clutch to operate, whereas an automatic system…

1. Clutches & Bands – These are friction devices that drive or lock planetary gear sets members. They are used to cause the gear set to transfer power. In other words, they are used to hold a particular member of the planetary gear set motionless, while allowing another member to rotate, thereby transmitting torque and producing gear reductions…

The planetary gear set is the device that produces different gear ratios through the same set of gears. Any planetary gear set has three main components: ·         The sun gear ·         The planet gears and the planet gears’ carrier ·         The ring gear Each of these three components can be the input, the output or can be held…

An automatic transmission is a motor vehicle transmission that can automatically change gear ratios as the vehicle moves, freeing the driver from having to shift gears.  In this transmission system the gears are never physically moved and are always engaged to the same gears. Automatic transmissions contain mechanical systems, hydraulic systems, electrical systems and computer controls, all working together in perfect…

Manual transmissions in modern passenger cars use synchronizers to eliminate the need for double-clutching. A synchro’s purpose is to allow the collar and the gear to make frictional contact before the dog teeth make contact. This lets the collar and the gear synchronize their speeds before the teeth need to engage as shown in figures….

Double-clutching is a driving technique solely used in manual transmission vehicles. Double-clutching was common in older cars and is still common in some modern Race Cars.  To understand how it works, the most important thing to know is that there are three systems involved: the engine, the clutch, and the transmission. Your engine produces power, the…