An Integrated Test Facility for Suspension Dampers of Commercial Vehicle

Paper #:
  • 2018-01-1383

Published:
  • 2018-04-03
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Abstract:
In the present scenario, delivering the right product at the right time is very crucial in automotive sector to grab the competitive advantage. In the development stage, validation process devours most of the product development time. This paper focuses on reducing the validation time for the damper variants which is a vital component in suspension system of commercial vehicle. Damper variants consist of cabin dampers and vehicle shock absorbers. Many automotive industries are carrying out damper testing with one sample at a time. The new test facility caters for durability testing of six samples simultaneously. This new test facility is designed to carry out both durability and performance tests in the same setup. In addition, it provides force trend monitoring during the validation which increases the efficiency of test with an enhanced control system. This new facility is also designed to provide side loading capability for individual dampers in addition to the conventional axial loading. Another key factor in any damper testing is control of temperature at the seal location during the validation. The validation standard calls for the temperature range of 70-90˚C. A cooling circuit was designed to provide an efficient temperature control which also reduces water loss. The re-circulating cooling system utilizes water from cooling tower whose primary function is to reduce servo-hydraulic oil temperature. The water flow is controlled through an electrically operated solenoid valve and the entire system is governed by NI FPGA controller programmed to provide precise temperature control by regulating the water flow.
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