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How does FWD work?

Published in Automotive Technology 2 mins read

Front-Wheel Drive (FWD) works by delivering engine power to the front wheels, which then pull the vehicle forward.

Here's a more detailed explanation:

  • Engine Power: The engine generates power, which is then sent to the transmission.

  • Transmission: The transmission modifies the engine's power output, providing different gear ratios to optimize speed and torque.

  • Driveshaft(s)/Half-Shafts: From the transmission, the power travels through driveshafts (also known as half-shafts) directly to the front wheels. These shafts are connected to the wheels via joints that allow for steering.

  • Pulling Action: Because the front wheels receive the power, they rotate and "pull" the car forward. The rear wheels are passive, simply following along.

Key Advantages of FWD:

  • Fuel Efficiency: FWD vehicles are often lighter and have fewer moving parts than All-Wheel Drive (AWD) or Rear-Wheel Drive (RWD) systems, resulting in better fuel economy.
  • Cost: Generally, FWD cars are less expensive to manufacture and maintain compared to AWD or RWD vehicles.
  • Traction in Slippery Conditions: In some cases, the weight of the engine over the driven front wheels can provide better traction on snow or ice compared to RWD.

Disadvantages of FWD:

  • Torque Steer: During hard acceleration, particularly in higher-powered FWD cars, you might experience "torque steer," where the steering wheel pulls to one side.
  • Weight Distribution: FWD vehicles tend to have more weight over the front axle, which can affect handling, especially during cornering.
  • Performance Limitations: FWD is generally less suitable for high-performance applications compared to RWD or AWD due to limitations in traction and weight transfer.

In summary, FWD is a drivetrain system where the engine's power is directed to the front wheels, enabling them to pull the car forward. It's a common and efficient system found in many modern vehicles.

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