In some of the most recent cars out there, you can shift gears simply by pressing a button, turning a knob or toggling a small joystick. Yet at the same time, plenty of different automobiles still require motorists to use one foot for the Variable Speed Drive Motor clutch pedal and another for the gas, all when using one hand to control the gear-change lever through a distinct pattern of positions. And several other current cars don’t possess any traditional gears at all in their transmissions.
But whether or not a vehicle includes a fancy automatic, an old-school manual or a modern-day consistently variable transmission (CVT), each unit has to do the same work: help transmit the engine’s output to the traveling wheels. It’s a complicated task that we’ll try to make a little simpler today, you start with the basics about why a tranny is needed to begin with.
Let’s actually begin with the typical internal combustion engine. As the fuel-air blend ignites in the cylinders, the pistons begin moving up and down, and that movement is used to spin the car’s crankshaft. When the driver presses on the gas pedal, there’s more fuel to burn off in the cylinders and the whole process moves faster 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 performance with the tires moving slower than the engine, while with a higher gear, optimum performance comes with the wheels moving faster.
With a manual transmission, gear shifting is handled by the driver with a gear selector. Many of today’s vehicles possess five or six ahead gears, but you’ll find older models with from three to six ahead gears offered.
A clutch is utilized to transmit torque from a car’s engine to its manual tranny. The various gears in a manual transmission 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 invite the car travel quicker.