When braking, accelerating and driving around curves, significant forces are generated, which the chassis must also cope with. This is only possible if all chassis components are optimally coordinated with each other. The chassis includes suspension and damping, front and rear wheel suspension, steering, as well as wheels and tires. The brakes, which are also part of the running gear, are described in a separate chapter.
Structural design of the running gear
Proper wheel suspension is a whole science. When a car, for example, moves along a soil fold or makes a turn at high speed, the geometry of the wheels, which are located at certain angles relative to the axis of the car, changes every time. The tires must not lose contact with the road, since in this case they cannot transmit the braking forces and the forces acting on the wheels when they turn. Suspension ensures that the wheels do not come off the ground. Suspension perceives shocks and follows the bumps in the road. Unwanted body vibrations that occur after bumps are prevented by shock absorbers. In fact, they should be called vibration dampers.
Steering and vehicle safety
Steering must be sensitive and precise. The steering is precisely coordinated with the axle shafts and the installation of the steered wheels. Like most modern cars, the A4 uses rack and pinion steering. The standard power steering makes the steering work easier and more sensitive and direct steering response. The overall safety of the vehicle largely depends on the steering. Incorrect installations and poorly executed repairs can have fatal consequences.
Rack and pinion steering, which is used in both the Audi A4 and Audi A6, has established itself in today's automotive industry
Independent repair of the chassis and steering
Chassis and steering jobs require experience and often require specialized garage equipment. If you are not confident in your abilities, or you do not have the necessary tools, then it is better to contact the workshop. Poorly made repairs pose a danger to you and to others. Do not straighten or weld damaged parts of the wheel suspension, such parts must be replaced.
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