Study of Hysteresis Curves for Conformity Assessment in EGR Valves

The automotive industry is one of the most competitive branches of industry worldwide, due to its demand for a better product. The concept of quality and conformity is extremely important to get an edge over other competitors in the market, while continuous improvement is one of the keys to adapting and improving in an industry where costs are as important as innovation for new and better products. This paper presents a new End-of-Line (EOL) method developed to enhance the quality control of Exhaust Gas Recirculation (EGR) valve. The new method is based on Hysteresis Current loop with two primary settings (open and closed). Through the analysis of the hysteresis current loop, the new method identifies the existence of non-conformities that affect the mechanical functionality of the EGR valves. The method recently implemented at the company involved in this study is having a significant impact on improving its quality control at an irrelevant appraisal cost.