Despite the confusing names and some confusing historical usage, there is a meaningful difference between four-wheel drive (4WD) and all-wheel drive (AWD).
May 2nd 2022 at 3:43PM
As you're certainly aware, most cars these days have four wheels. So why do people make a distinction between all-wheel drive and four-wheel drive when driving four wheels clearly means you're driving all of them, and vice versa? Despite the confusing names, and some confusing historical usage, there is a meaningful difference between four-wheel drive and all-wheel drive systems.Before we delve into the specifics, it's important to understand the basics of each system.
Considered by many to be one of the key distinguishing factors between a four-wheel-drive and an all-wheel-drive vehicle, the transfer case is an additional range of gearing, typically divided into a high and a low range. This extra gearing allows the wheels to turn more slowly for a given engine speed, enhancing both driver control and available torque to maximize off-road capability.
, much of what you read above is not in any way applicable. Instead of relying on differentials or transfer cases to send power to the secondary axle, there is simply an extra electric motor that powers the secondary axle. For instance,feature a front axle powered by a combination of an electric motor and gasoline engine, while the rear axle is powered only by its own electric motor. They work in concert with each other thanks to the magic of computers, but are not mechanically related.
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