Identification of Car damper Strut Supports Defects

Abstract

The goal of current research is the systematization of information from existent constructions of upper supports, features of support elements load depending on their constructions, analysis aspects, which influence supports attrition and their probable defects, and also giving recommendations for diagnostics. The informational analysis made due to existent upper supports constructions, features of their action in exploitation conditions, considered factors which influence on supports attrition, and their probable defects. Considered supporting bearer and rubber damping elements of damper strut supports fail indications. Fail of rubber damping elements characterized by the range of attributes. Due to car exploitation take place support detail attrition, rubber damping elements of supports waste their elasticity, crack and delaminate from the metal details, rubber damping supports stretch, which leads to support`s contact with upper springs cap and attends with singular thumps. Due to bearing attrition level of rattling and decreasing driving comfort are much higher than due to rubber element attrition. Features of increased bearing attrition are next: rattling by rudder turning occurrence (can also take place on the steering wheel), deterioration of car control. Bearing attrition appears in terms of squeaks and jerks in the process of steering wheel turning in the cars without a power steering. Due to attrition bearing starts to play, thump, and damper piston rod deviates from own axle. During car motion on the small roughs with depleted bearings also perceived rattling from the side of suspender, which sometimes can be difficult to identify, because it is analogous to rattling caused by attrition of other details of suspender or steerage. Offered to realize damper strut supports diagnostics by the way of support` action in a car moving conditions on the pocky surface simulation, to solve this task recommended to use vibration stand for suspender diagnostics. Offered to use the identification of hits and vibrations in foreworn supports via vibration acceleration sensor with later processing.