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公开(公告)号：US20150075501A1
公开(公告)日：2015-03-19
申请号：US14027404
申请日：2013-09-16
发明人： MARK W PETERS , ROBERT ROY JENTZ , AED M DUDAR , ROMAN SCHESNUK , JACK MARSHALL
IPC分类号： F02M25/08
CPC分类号： F02M25/0854 , B60K2015/0319 , F02D41/0037 , F02D41/222 , F02D2041/223 , F02M25/0809 , F02M25/0836 , F02M25/089 , Y02T10/40 , Y02T90/14
摘要： A method for verifying the reliable operation of a fuel tank pressure transducer positioned within a fuel tank of a PHEV. The method detects the initiation of a refueling cycle, which leads to opening a system vent valve positioned between a carbon canister and a system vent, and opening a fuel tank isolation valve. A controller monitors fuel system pressure within the fuel tank and at the vent valve, and that device determines rates of change of the fuel system pressure within the fuel tank and at the outlet vent. Reliable operation of the fuel tank pressure transducer is indicated upon a determination that the rates of change of the fuel system pressure in the fuel tank and at the outlet vent are uniform within a predetermined range.
摘要翻译： 一种用于验证位于PHEV的燃料箱内的燃料箱压力传感器的可靠操作的方法。 该方法检测加油循环的启动，这导致打开位于碳罐和系统通风口之间的系统排放阀，并打开燃料箱隔离阀。 控制器监测燃料箱内和燃油通气阀处的燃料系统压力，并且该装置确定燃料箱内和燃油箱出口处的燃料系统压力变化率。 在确定燃料箱中和出口处的燃料系统压力的变化率在预定范围内是均匀的情况下，可以指示燃料箱压力传感器的可靠操作。
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公开(公告)号：US20150090006A1
公开(公告)日：2015-04-02
申请号：US14042748
申请日：2013-10-01
IPC分类号： F02M25/08
CPC分类号： F02M25/0818 , F02D29/02
摘要： A method and system for conducting leak detection in an evaporative emission control system. The method performs a pressure-based leak test at selected intervals. The pressure-based test includes pressurizing the system, using a pump. Then, the system monitors pressure for a selected period. If system pressure falls below a threshold value during the selected period, the system identifies an initial leak. Upon identifying the initial leak, the system substitutes a vacuum-based leak test at each selected interval. The vacuum-based test includes evacuating the system, using the pump. The system then monitors system pressure for a selected period. If system pressure rises above a threshold value during the selected period, then the system identifies a subsequent leak. Upon receiving notification that the initial leak has been repaired, the system returns to pressure-based leak testing. Where a single pump is used, that pump is configured both for system pressurization and evacuation.
摘要翻译： 一种用于在蒸发排放控制系统中进行泄漏检测的方法和系统。 该方法以选定的间隔执行基于压力的泄漏测试。 基于压力的测试包括使用泵对系统进行加压。 然后，系统监视所选时段的压力。 如果系统压力在所选时间段内下降到阈值以下，则系统会识别初始泄漏。 在确定初始泄漏后，系统将以每个选定的间隔代替基于真空的泄漏测试。 基于真空的测试包括使用泵排空系统。 系统然后监视所选时间段内的系统压力。 如果系统压力在选定的时间段内上升到阈值以上，则系统会识别后续的泄漏。 在收到初始泄漏已被修复的通知后，系统返回到基于压力的泄漏测试。 在使用单个泵的情况下，该泵配置为用于系统加压和撤离。
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公开(公告)号：US20140303830A1
公开(公告)日：2014-10-09
申请号：US13858087
申请日：2013-04-07
发明人： AED M DUDAR , ROBERT ROY JENTZ
IPC分类号： F02M25/08
CPC分类号： F02M25/0809 , F02M25/08 , F02M25/0818 , F02M25/0836 , F02M25/0872 , F02M25/089 , G01M3/26 , G01M3/3236 , G01M3/3263
摘要： A combined system for detecting leaks in an evaporative emission control system and for inflating flat tires. The evaporative emission control system includes a vapor capture canister with a purge valve and a system pressure sensor, and the flat tire repair kit includes a reservoir containing tire inflation fluid, an attachment tube for attaching the reservoir to a tire, and a pump selectively connected to the evaporative emission control system and the reservoir. A controller is configured to perform the following actions: initiate a leak detection sequence by pressurizing the evaporative emission control system, and then performing a leak detection operation by measuring the pressure within the evaporative emission control system over time. A tire pressure monitoring system may be provided, allowing the pump to be switched between performing evaporative system testing and inflating a flat tire.
摘要翻译： 一种用于检测蒸发排放控制系统中的泄漏并用于使扁平轮胎充气的组合系统。 蒸发排放控制系统包括具有净化阀和系统压力传感器的蒸汽捕获罐，并且该轮胎修补工具包括一个包含轮胎充气流体的储存器，用于将贮存器连接到轮胎上的连接管和一个有选择地连接的泵 到蒸发排放控制系统和储层。 控制器被配置为执行以下动作：通过对蒸发排放控制系统加压来启动泄漏检测顺序，然后通过随时间测量蒸发排放控制系统内的压力来执行泄漏检测操作。 可以提供轮胎压力监测系统，允许在执行蒸发系统测试和对扁平轮胎充气之间切换泵。
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