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1. 发明申请

WO2017212015A1 METHOD FOR DETECTING A LEAK IN A FEED LINE OF LIQUID SYSTEM IN A MOTOR VEHICLE 审中-公开
标题翻译：一种检测机动车辆中液体系统的供给管路中的泄漏的方法
公开(公告)号：WO2017212015A1
公开(公告)日：2017-12-14
申请号：PCT/EP2017/064075
申请日：2017-06-09
申请人： PLASTIC OMNIUM ADVANCED INNOVATION AND RESEARCH
发明人： DEDEURWAERDER, Jürgen , VERSPECHT, Jonathan
IPC分类号： F01N11/00 , F02M65/00 , F02M37/08 , F02D33/00 , B60K15/00 , G01M3/28 , G01M3/02
摘要： A method for detecting a leak in a liquid system (e.g. for cleaning windows, fuel system or urea based SCR-system), the liquid system comprising a tank for storage of a liquid solution, an injector, a feed line arranged between the tank and the injector, a pressurizing means for allowing the liquid solution to flow in the feed line from the tank to the injector, a pressure sensor arranged to measure a pressure in the feed line, the method comprising the following steps • e) Operating the injector to generate a controlled injector liquid flow rate, (50) • f) Operating the pressurizing means for allowing the liquid solution to flow in the feed line from the tank to the injector, (100) • g) Monitoring the pressure of the liquid in the feed line and/or monitoring the feed line input liquid flow rate, (110) • h) Detecting an abnormal operating condition when the feed line input liquid flow rate increases above a predetermined feed line liquid flow rate threshold (Thl ) for a given feed line pressure and a given controlled injector liquid flowrate, and/or when the monitored feed line pressure decreases below a predetermined feed line pressure threshold (Th2) for a given feed line input liquid flow rate and a given controlled injector liquid flow rate (120) • i) When the abnormal condition is detected, the method comprises the further steps of • a) Operating the injector in order to prevent liquid from exiting the feed line, (130) • b) Depressurizing the feed line, (135) • c) Monitoring pressure measured by the pressure sensor subsequent to the depressurizing of the feed line, (140) • d) Determining the presence of a leak in the system by detecting whether the monitored pressure deviates from a predetermined pressure value over a predetermined time period or deviates from a predetermined pressure evolution based on at least one measurement. (150).
摘要翻译：一种用于检测液体系统中的泄漏（例如，用于清洁窗户，燃料系统或基于尿素的SCR系统）的方法，所述液体系统包括用于储存液体溶液的罐，喷射器，布置在罐和喷射器之间的进料管线，用于允许液体溶液在进料管线中从罐到喷射器流动的加压装置，布置成测量进料线中的压力的压力传感器，该方法包括以下步骤步骤•e）操作注射器以产生受控的注射器液体流量，（f）操作加压装置，使液体溶液从注射器流入注射器，（100）•g）监测进料管线中液体的压力和/或监测进料管线输入液体流速，（110）h）当进料管线输入液体流速增加到预定进料管线液体流速以上时，检测异常工作状态阈值（Thl）对于给定的供给管线压力和给定的受控的喷射器液体流率，和/或当监测的供给管线压力降低到对于给定的供给管线输入液体流率和给定的受控的喷射器液体流量的预定供给管线压力阈值（Th2）速率（120）•i）当检测到异常情况时，该方法还包括以下步骤：a）操作喷射器以防止液体从进料管线中排出（130）。b）对进料管线进行减压（（c）通过压力传感器测量压力传感器在进给管线减压之后测量的压力，（140）d）通过检测监测压力是否偏离预定压力值，确定系统中是否存在泄漏基于至少一个测量结果预定的时间段或偏离预定的压力演变。（150）。

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