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

Applicant: PLASTIC OMNIUM ADVANCED INNOVATION AND RESEARCH

Inventor： DEDEURWAERDER, Jürgen ,  VERSPECHT, Jonathan

IPC: F01N11/00 ,  F02M65/00 ,  F02M37/08 ,  F02D33/00 ,  B60K15/00 ,  G01M3/28 ,  G01M3/02

Abstract: 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).

Abstract translation: 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）。

公开(公告)号：WO2017211425A1

公开(公告)日：2017-12-14

申请号：PCT/EP2016/063218

申请日：2016-06-09

Applicant: PLASTIC OMNIUM ADVANCED INNOVATION AND RESEARCH

Inventor： DEDEURWAERDER, Jürgen ,  VERSPECHT, Jonathan

IPC: F01N11/00

CPC classification number: F01N3/2066 ,  B60K13/04 ,  B60K15/00 ,  F01N11/00 ,  F01N2610/02 ,  F01N2610/144 ,  F01N2610/146 ,  F01N2610/1473 ,  F01N2900/1808 ,  F01N2900/1812 ,  F01N2900/1822 ,  F02D33/003 ,  F02D41/22 ,  F02D2041/228 ,  F02M65/006 ,  G01M3/2815 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

Abstract: A method for detecting a leak in a feed line of a SCR system of a vehicle, the system comprising a tank for the storage of an ammonia precursor solution, an injector, the feed line being arranged between the tank and the injector, and a pressure sensor arranged to measure a pressure in the feed line. The method comprises a preliminary test and the following subsequent steps of:• - closing the injector (21); • - depressurizing the feed line (22); by a reversably operating pump or a second pump for reverse direction • - monitoring pressure measured by the pressure sensor subsequent to the depressurizing (23); • - determining the presence/absence of a leak in the feed line by detecting whether the monitored underpressure deviates from a predetermined pressure evolution based on one or more measurements.

Abstract translation: 一种用于检测车辆的SCR系统的供给管线中的泄漏的方法，所述系统包括用于储存氨前体溶液的罐，喷射器，所述供给管线布置在所述 罐和注射器，以及布置成测量供给管线中的压力的​​压力传感器。 该方法包括初步测试和随后的以下步骤： - 关闭注射器（21）; • - 降低进料管线（22）的压力; 通过可逆操作的泵或用于反方向的第二泵来实现。 - 监测减压之后由压力传感器测量的压力（23）。 - 通过基于一次或多次测量来检测监测到的负压是否偏离预定的压力变化来确定供给管线中是否存在泄漏。