A Study of Leakage Inspection System for EWP

Abstract

An EWP (Electric Water Pump) is one of the most important devices for circulation of refrigerant used in automotive cooling system. Prior to using the EWP, a passive circulating motor connected to an automobile engine was used. Existing motors are being replaced by EWPs due to problems such as degraded engine efficiency. In this paper, we propose a real - time leakage inspection system connected with a robotic system that mass - produces EWPs. The leakage inspection system judges whether there is a defect by inspecting the EWP manufactured through the production system in real time. For efficient detection, various media such as air, water, and helium were used. Among them, helium is the best way to detect defect of a manufactured EWP. In the case of using the leakage inspection system proposed in this paper, it is possible to shorten the entire manufacturing process and reduce the cost by judging whether there is a defect in EWP in real time.