What is the primary function of CV joints in a vehicle?

The primary function of CV joints, or Constant Velocity joints, in a vehicle is to transmit engine power to the wheels. These joints are crucial components of the drivetrain, allowing the drive shafts to transfer torque from the engine through the transmission to the wheels while accommodating the movements of the suspension and steering. The design of CV joints enables them to maintain a constant velocity during operation, regardless of the angle of the shafts or the suspension travel, which is essential for smooth vehicle operation.

While the other choices describe important vehicle functions, they do not pertain to the specific role of CV joints. Supporting the vehicle weight relates more to suspension components, controlling steering response pertains to the steering system, and absorbing bumps in the road is a function of the suspension design rather than the CV joints themselves. Thus, understanding the primary role of CV joints helps clarify their function within the overall mechanics of a vehicle's drivetrain.