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Lower Control Arms

How Does a Lower Control Arm Work?

The lower control arm is a type of suspension used in motor vehicles. The general function of control arms is to keep the wheels of a motor vehicle from uncontrollably swerving when the road conditions are not smooth. The lower control arms perform this function the best according to many and are thus some of the best types of suspension. This type of suspension provides excellent shock absorption because of its shape. It has a wishbone or an “A” shape on the bottom which carries most of the load from the shock received. It absorbs the shock and keeps the wheels firmly in place thus creating a steadier ride.

Description of the Lower Control Arm

The entire suspension normally consists of an upper and a lower arm. The purpose of the unit is to absorb the shock taken in by the wheels as a result of the road conditions. The upper and lower control arms have different structures based on the model and purpose of the vehicle. By many accounts, the lower control arm is the better shock absorber of the two because of its position and load bearing capacities. It can have an “A” shape or what many in the automotive world refer to as a wishbone shape or it can just have a single arm. Whatever the case, these arms absorb impact and keep the tires from swerving.

Function of the Lower Control Arm

The lower control arm functions to absorb the shock of the entire wheel. The wheel receives shock when the motor vehicle travels on roads that are not smooth. Its function is to act as a spring when the car travels over rough roads and transfer that energy to the coils of the suspension. The suspension then holds the energy and dissipates it so that the driver and passengers do not experience a bumpy ride. Wishbone lower control arm suspensions carry more load than their single arm lower control counterparts and are thus better shock absorbers.

The lower control arm takes in most of the impact that the road has on the wheels of the motor vehicle. It either stores that impact or sends it to the coils of the suspension depending on its shape. Some think lower control arms that store more impact are the better choice because they provide less of an impact. Whatever the case, lower control arm suspensions offer a smooth ride to driver and passengers.

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