variable speed transmission

In a few of the latest cars out there, you can shift gears by simply pressing a button, turning a knob or toggling a little joystick. Yet at the same time, plenty of different vehicles still require drivers to make use of one foot for the clutch pedal and another for the gas, all when using one hand to manipulate the gear-change lever through a definite design of positions. And many other current cars don’t have any traditional gears at all in their transmissions.

But whether or not a vehicle has a fancy automatic, an old-school manual or a modern-day constantly variable transmitting (CVT), each unit must do the same job: help transmit the engine’s Variable Speed Transmission result to the driving wheels. It’s a complicated task that we’ll make an effort to make a bit simpler today, starting with the fundamentals about why a transmission is needed to begin with.
Let’s actually start with the typical internal combustion engine. As the fuel-air combination ignites in the cylinders, the pistons start upgrading and down, and that movement can be used to spin the car’s crankshaft. When the driver presses on the gas pedal, there’s more fuel to burn in the cylinders and the whole process moves quicker and faster.

What the transmission does is change the ratio between how fast the engine is spinning and how fast the driving wheels are moving. A lesser gear means optimum overall performance with the tires moving slower than the engine, while with a higher gear, optimum performance includes the wheels moving quicker.
With a manual transmission, gear shifting is handled by the driver with a gear selector. Many of today’s cars have five or six forward gears, but you’ll find older models with from three to six forwards gears offered.

A clutch can be used to transmit torque from a car’s engine to its manual tranny. The many gears in a manual transmitting allow the car to visit at different speeds. Bigger gears offer lots of torque but lower speeds, while smaller gears deliver much less torque and allow the car travel more quickly.

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