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    • 3. 发明公开
    • Leakage detection system and method for fuel tank systems
    • Leckdetektionssystem und -verfahrenfürKraftstofftanksysteme
    • EP2801716A1
    • 2014-11-12
    • EP14165449.1
    • 2014-04-22
    • Volvo Car Corporation
    • Larvall, JoakimForsberg, Magnus
    • F02M25/08B60K15/035
    • F02M21/0293F02M25/0809F02M25/0818G01M3/04
    • A method (100) for detecting a leakage in a fuel tank system comprises generating (130) an initial pressure in the fuel tank system, determining (140) a pressure difference between the pressure in the fuel tank system and the first reference pressure, determining (150) a linearity metric, by comparing the determined pressure difference to at least one out of a linear and a non-linear data model, the linearity metric quantifying the non-linearity of said pressure difference as a function of time; and detecting (170) a leakage in the fuel tank system based on the linearity metric, wherein a non-linear pressure difference function of time is indicative of a leakage in the fuel tank system.
    • 一种用于检测燃料箱系统中的泄漏的方法(100)包括:产生(130)燃料箱系统中的初始压力,确定(140)燃料箱系统中的压力与第一参考压力之间的压力差,确定 (150)通过将所确定的压力差与线性和非线性数据模型中的至少一个进行比较来确定所述压力差的非线性作为时间的函数的线性度量; 以及基于线性度量来检测(170)燃料箱系统中的泄漏,其中时间的非线性压力差函数表示燃料箱系统中的泄漏。
    • 9. 发明公开
    • Leak diagnostic apparatus for an evaporative emission control system
    • Leckagediagnosevorrichtungfürein Kraftstoffverdunstungssystem
    • EP2116716A2
    • 2009-11-11
    • EP09159598.3
    • 2009-05-07
    • Nissan Motor Company, Ltd.
    • Takakura, Shinsuke
    • F02M25/08
    • F02M25/0809
    • A leak diagnostic apparatus is provided for an evaporative emission control system that purges fuel vapor from an inside of a fuel tank (1) to an intake passage (6) of an internal combustion engine. The leak diagnostic apparatus is basically provided with a pressure detecting device and a leak determining device. The pressure detecting device is configured and arranged to detect a pressure inside the evaporative emission control system, which includes the fuel tank (1). The leak determining device sets a leak determination threshold value in accordance with a deformation amount of the fuel tank (1), and determines if a leak exists by comparing the pressure inside the evaporative emission control system while the evaporative emission control system is sealed to the leak determination threshold value.
    • 提供一种用于将燃料蒸气从燃料箱(1)的内部吹扫到内燃机的进气通道(6)的蒸发排放控制系统的泄漏诊断装置。 泄漏诊断装置基本上设置有压力检测装置和泄漏判定装置。 压力检测装置被构造和布置成检测包括燃料箱(1)的蒸发排放控制系统内部的压力。 泄漏判定装置根据燃料箱(1)的变形量设定泄漏判定阈值,通过比较蒸发排放控制系统内部的压力而确定是否存在泄漏,同时蒸发排放控制系统被密封到 泄漏判定阈值。