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Tie rod ends are used in the steering linkage, steering knuckle pivot supports, and various hinge mechanisms. They connect the center link to the steering knuckle on cars with ordinary suspension systems and recirculating ball steering gears.Together with the ball joints, tie rod ends make sure the car steers left and right at the same time it is hitting bumps and potholes that might cause the wheel to travel up and down. 

The sleeve connects the inner and outer tie rod ends together and allows for adjustment when the front wheels are aligned.The outer tie rod ends are connected to the steering knuckle that actually turns the front wheels.The steering knuckle has an upper and lower ball joint that it pivots on and creates the geometry of the steering axis. It consists of an inner and outer end. The inner tie rod ends are attached to either end of the center link and are served as pivot points for the steering gear.
A rocker arm is one of the automotive parts in the internal combustion engine.As the arm is worked on by a camshaft lobe,it pushes open either an intake or exhaust valve.This allows fuel and air to be drawn into the combustion chamber during the intake stroke or exhaust gases to be expelled during the exhaust stroke.Rocker arms have been invested for more than two hundred years and Its function has been change littlesince then.During the developing of rocker arms,Both the operation efficiency and production material are keeping improved. Many modern rocker arms are made of drop forging process with material 42CrMo or other alternative materials.

In many internal combustion engines,rotational motion is induced in the crank shaft as the pistons cause it to rotate.This rotation is translated to the camshaft via a belt or chain.In turn,lobes on the camshaft are applied to push open the valves via rocker arms.This can be achieved either through direct contact between a camshaft lobe and rocker arm or indirectly though contact with a lifter driven pushrod. Overhead cam engines have lobes on the camshaft which contact each rocker arm directly, while overhead valve engines utilize lifters and pushrods.In overhead cam engines,the camshaft can be located in the head,while overhead valve engines have the camshaft in the block.Both varieties are seen in the US,but regulations have contributed to the decline of overhead valve applications elsewhere in the world.
A control arm is a bar that has a pivot at both ends. A car has several, including the upper control arm and the lower control arm, which are arranged to form the letter A.Control arms are part of the suspension system. They attach suspension members to the chassis and manage the motion of the wheels so that it synchronizes with that of the body of the car. They work with bushings, which are cylindrical linings that reduce friction and restrain the auto parts from going every which way.

As a result, you are able to go on joy rides without feeling sick and dizzy, as there is control and smoothness in the movement of the car. The two bottom points of the control arms that form the letter A are attached to the frame of the vehicle while the top point is attached to the spindle. Three or four control arms are placed between the rear axle housing and the frame if you have coil springs in both the front and rear suspensions.Like other body parts, the control arms should also be lubricated at every oil inspection. Handling and steering could become erratic if the control arms are malfunctioning and the unsteady movements of your car could take away your riding comfort.
Connecting rod used in automotive is a major link inside of a combustion engine.It connects the piston to the crankshaft and transfer power from the piston to the crankshaft,then send it to the transmission.After finishing the design of a connecting rod,we could choose different materials and production ways.In most cases,connecting rod will be made in steel or aluminum.And we could consider investment casting process,drop forging process or powdered metallurgy.But according to its fuction,most purchasers will prefer drop forging process(see the differences between drop forging and investment casting),and the do precision machining.

When connecting rod applied in vehicle engined,investment casting is available.This type of rod is made just by pouring the molten steel into a mold,and then do machining to achieve finished parts.It is reliable for lower horsepower-producing engines and is the cheapest way to manufacture.Casting connecting rod can be used in almost each type of engine, from gasoline to diesel.But due to the shortage of casting process,defects may be easily produced.By contrast,drop forging is better.
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