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    • 1. 发明授权
    • Method and arrangement for detecting and documenting damage to a
catalytic converter
    • 用于检测和记录催化转化器损坏的方法和装置
    • US5763771A
    • 1998-06-09
    • US731740
    • 1996-10-18
    • Karl OttHelmut DenzErnst Wild
    • Karl OttHelmut DenzErnst Wild
    • B60K15/077F01N3/20F01N9/00F01N11/00F02D45/00G01M15/00
    • F01N3/20F01N11/00F01N9/00F01N2550/02Y02T10/47
    • The invention is directed to a method for detecting and documenting damage to a catalytic converter in a motor vehicle having a fuel tank and an internal combustion engine wherein combustion misfires can occur when the level of fuel in the tank drops below a critical level. The method includes: detecting the level of fuel in the tank utilizing a fill-level sensor device; utilizing a circuit arrangement to determine when the level in the tank reaches the critical level and switching on a warning lamp to indicate that the critical level has been reached; storing a value corresponding to the critical level and the operating state of the warning lamp in a memory as a first set of data; detecting misfires of the engine and storing information as to the misfires in the memory as a second set of data; and, logically combining the first and second sets of data when the misfires are present at the same time as the critical fill level so that a determination can be made in the context of a later read out of the logically coupled data as to whether the misfires are associated with a level of the fuel corresponding to the critical level.
    • 本发明涉及一种用于检测和记录具有燃料箱和内燃机的机动车辆中的催化转化器的损坏的方法,其中当燃料箱中的燃料水平低于临界水平时,可能发生燃烧失火。 该方法包括:利用填充层传感器装置检测罐中的燃料水平; 利用电路装置来确定罐中的水位何时达到临界水平并打开警告灯以指示达到临界水平; 将与临界水平相对应的值和警告灯的操作状态存储在存储器中作为第一组数据; 检测发动机的失火并将关于存储器中的失火的信息存储为第二组数据; 并且当在与临界填充水平同时存在失火时逻辑地组合第一组数据和第二组数据,使得可以在稍后读取逻辑耦合数据的上下文中确定是否失火 与对应于临界水平的燃料水平相关联。
    • 2. 发明授权
    • Method and arrangement for diagnosing a tank-venting system
    • 诊断通气系统的方法和装置
    • US5666925A
    • 1997-09-16
    • US647757
    • 1996-05-15
    • Helmut DenzErnst WildAndreas BlumenstockGeorg Mallebrein
    • Helmut DenzErnst WildAndreas BlumenstockGeorg Mallebrein
    • G01M3/24B60K15/077F02M25/08F02M37/00G01M3/26F02M37/04
    • F02M25/0809
    • The invention is directed to a method for checking the tightness of a tank-venting system used with an internal combustion engine having an intake pipe. The tank-venting system includes a fuel tank wherein fuel vapor forms, a storage device connected to the fuel tank, the storage device having a vent opening and a device for closing the vent opening, and a tank-venting valve interconnecting the intake pipe and the storage device whereby the fuel vapor is conducted from the tank to the intake pipe via the storage device and the tank-venting valve. The method includes the steps of: (a) during operation of the engine and while the venting opening is closed, carrying out one of the following: (a1) opening the tank-venting valve and drawing a predetermined quantity of gaseous substance through the tank-venting valve, or (a2) opening the tank-venting valve and drawing a gaseous substance through the tank-venting valve so long until a predetermined underpressure is reached in the tank-venting system, so that a pressure fluctuation is produced in the tank-venting system with the pressure fluctuation being characterized by a plurality of characteristic variables; (b) evaluating at least one of the characteristic variables to judge the tightness of the tank-venting system.
    • 本发明涉及一种用于检查与具有进气管的内燃机一起使用的排气系统的紧密度的方法。 排气系统包括燃料蒸气形成的燃料箱,连接到燃料箱的存储装置,具有通气口的存储装置和用于关闭通风口的装置,以及将进气管和 存储装置,其中燃料蒸气经由存储装置和排气阀从罐传导到进气管。 该方法包括以下步骤:(a)在发动机运转期间和通气口关闭的同时,执行以下操作之一:(a1)打开排气阀并通过罐抽出预定量的气态物质 或者(a2)打开排气阀,并将气体物质通过罐排放阀长时间直到达到在通气系统中预定的负压,从而在罐中产生压力波动 压力波动的特征在于多个特征变量; (b)评估至少一个特征变量来判断排气系统的紧密度。
    • 3. 发明授权
    • Method and apparatus for checking the tightness of a tank-venting system
    • 用于检查排气系统密封性的方法和装置
    • US5460141A
    • 1995-10-24
    • US246518
    • 1994-05-20
    • Helmut DenzErnst WildAndreas Blumenstock
    • Helmut DenzErnst WildAndreas Blumenstock
    • F02M25/08F02M33/02
    • F02M25/0809
    • The invention is directed to a method for checking the tightness of a tank-venting system when a pregiven test condition is satisfied. The method includes the steps of: (a) building up a difference pressure in the tank-venting system irrespective of whether the pregiven test condition is satisfied; (b) determining the presence of the test condition and then closing the tank-venting system; (c) determining the value of the decay gradient of the difference pressure when the pregiven test condition is satisfied thereby losing no time in starting the check of the tightness; and, (d) drawing a conclusion as to the tightness of the tank-venting system when the value of the decay gradient is less in magnitude than a threshold decay gradient. In this way, as soon as the test condition is satisfied, a determination of the value of the decay gradient of the difference pressure already built up can be started. An apparatus for carrying out the method is also disclosed.
    • 本发明涉及一种在满足预制测试条件时检查罐排气系统的紧密度的方法。 该方法包括以下步骤:(a)建立罐排气系统中的差压,无论是否满足预先测试条件; (b)确定测试条件的存在,然后关闭油箱排气系统; (c)确定当预先测试条件满足时差压的衰减梯度的值,从而在开始检查紧密度时没有时间; 和(d)当衰减梯度的值小于阈值衰减梯度时,得出关于通气系统的紧密度的结论。 以这种方式,一旦满足测试条件,就可以开始确定已经建立的差压的衰减梯度的值。 还公开了一种用于执行该方法的装置。
    • 6. 发明授权
    • Tank-venting system for a motor vehicle as well as a method and an
arrangement for checking the operability thereof
    • 用于机动车辆的排气系统以及用于检查其可操作性的方法和装置
    • US5442551A
    • 1995-08-15
    • US989026
    • 1993-03-11
    • Helmut DenzErnst WildAndreas Blumenstock
    • Helmut DenzErnst WildAndreas Blumenstock
    • B60K15/035F02D35/00F02M25/08G01M3/26F02M33/02G01M15/00
    • G01M3/26B60K15/03504F02M25/0809
    • A method for determining the operability of a tank-venting system on a motor vehicle subjects the signals for the volume flow through the tank-venting valve and the signals for the pressure difference between the tank interior and the ambient to a cross-covariance analysis. The above-mentioned signals are formed by a high pass in advance of forming the cross-covariance function and the maximum or the mean value of the cross-covariance function is formed with respect to the product of the two input variables. A variance measure is formed for the signal of the volume flow through the tank-venting valve and a transfer factor is computed from the variance measure and the mean value or maximum. The tank-venting system is deemed to be operational when the transfer range lies in a pregiven region. An advantage of the method is seen in the independence of the tank-pressure changes which are not caused by volume-flow changes through the tank-venting valve. Here, changes are especially of concern which are caused by the sudden generation of vapor in the tank such as caused by sloshing fuel.
    • PCT No.PCT / DE92 / 00504 Sec。 371日期1993年3月11日 102(e)1993年3月11日PCT PCT 1992年6月19日PCT公布。 出版物WO93 / 01405 日期:1993年1月21日。一种用于确定机动车辆上的排气系统的可操作性的方法,经由通气阀的体积流量的信号和罐内部与环境之间的压力差的信号 进行交叉协方差分析。 上述信号在形成交叉协方差函数之前通过高通形成,并且相对于两个输入变量的乘积形成互协方差函数的最大值或平均值。 对于通过排罐阀的体积流量的信号形成方差测量,并根据方差测量值和平均值或最大值计算转移系数。 当转移范围在预制区域时,通风系统被认为是可操作的。 该方法的优点在于容器压力变化的独立性,这不是通过通气阀的体积流量变化引起的。 在这里,特别关注的是由于罐内蒸气的突然产生,如由燃料挥动引起的。
    • 7. 发明授权
    • Method and arrangement for obtaining an evaluation value for the
performance loss of a catalytic converter
    • 获得催化转化器性能损失评估值的方法和装置
    • US5255515A
    • 1993-10-26
    • US981844
    • 1992-11-25
    • Andreas BlumenstockErnst WildHelmut DenzKlaus Ries-Muller
    • Andreas BlumenstockErnst WildHelmut DenzKlaus Ries-Muller
    • F01N3/20F01N11/00F02B77/08F02D35/00G01M15/04G01N33/00F07N3/20
    • F01N11/007F01N2550/02Y02T10/47
    • The invention is directed to a method for obtaining a value for evaluating the performance loss of a catalytic converter with the aid of a forward signal of a forward gas probe mounted forward of the catalytic converter and a rearward signal of a rearward gas probe mounted rearward of the catalytic converter, the catalytic converter being connected to an internal combustion engine. The method includes the steps of: carrying out the method during the steady-state operation of the engine; multiplying the forward signal and the rearward signal with each other to form a plurality of products; averaging the products over a plurality of oscillations of the forward signal to obtain a mean value; and, utilizing the mean value as a value for evaluating the performance loss of the catalytic converter. This correlation method can be varied in different ways and especially in that the forward-probe signal is correlated without or with phase shift with the rearward-probe signal. A cross-correlation factor or the real or imaginary component of an orthogonal correlation or other correlation values are obtained in dependence upon the nature of the correlation. These correlation values are used for evaluating the performance loss of the catalytic converter. The evaluation of the performance loss of the catalytic converter with the aid of these correlation values is very significantly more reliable than the evaluation with the aid of amplitudes or amplitude mean values of the probe signals.
    • 本发明涉及一种用于通过安装在催化转化器前方的正向气体探针的前向信号和后方气体探针的向后信号获得用于评估催化转化器的性能损失的值的方法, 催化转化器,催化转化器连接到内燃机。 该方法包括以下步骤:在发动机的稳态运行期间执行该方法; 将前向信号和后向信号彼此相乘以形成多个乘积; 在正向信号的多个振荡中对产品进行平均以获得平均值; 并利用平均值作为评价催化转化器的性能损失的值。 该相关方法可以以不同的方式变化,特别是前向探针信号与后向探测信号无相关或相移相关。 取决于相关性质,获得正交相关或其他相关值的互相关因子或实分量或虚分量。 这些相关值用于评估催化转化器的性能损失。 借助于这些相关值对催化转化器的性能损失的评估与借助于探测信号的幅度或振幅平均值的评估相比非常显着更可靠。
    • 8. 发明授权
    • Method for protecting a catalyzer
    • 保护催化剂的方法
    • US5074270A
    • 1991-12-24
    • US644011
    • 1991-01-22
    • Helmut DenzErnst WildRudi Mayer
    • Helmut DenzErnst WildRudi Mayer
    • F02D41/22
    • F02D41/221F01N2430/06Y02T10/40
    • The invention is directed to a method for protecting a catalyzer against overheating. The method includes the steps of checking whether an injection valve no longer correctly closes by means of a conventional diagnostic process. If the condition is present that an injection valve no longer correctly closes, the air/fuel mixture for all cylinders is enriched and an overrun switchoff is inhibited. The method leads to the condition that in all load ranges, the oxygen quantity reaching the catalyzer is limited so that no damaging afterburning can take place. In this way, the catalyzer is protected against overheating and the affected vehicle is not disabled.
    • 本发明涉及一种用于保护催化剂免于过热的方法。 该方法包括以下步骤:通过常规诊断过程检查喷射阀是否不再正确关闭。 如果存在注入阀不再正确关闭的情况,则所有气缸的空气/燃料混合物都会被浓缩,并且可以抑制超限切换。 该方法导致在所有负载范围内到达催化剂的氧量受到限制,从而不会发生有害的后燃烧。 以这种方式,催化剂被防止过热,并且受影响的车辆不被禁用。
    • 10. 发明授权
    • Tank-venting arrangement and method for checking the tightness thereof
    • 油罐安装方法及其检验方法
    • US5220896A
    • 1993-06-22
    • US811526
    • 1991-12-20
    • Andreas BlumenstockHelmut DenzUlrich SteinbrennerErnst Wild
    • Andreas BlumenstockHelmut DenzUlrich SteinbrennerErnst Wild
    • F02B77/08B60K15/035F02M25/08F02M37/00
    • B60K15/03504
    • A tank-venting arrangement includes: a tank; an adsorption filter connected to the tank; a tank-venting valve interconnecting the adsorption filter and the intake pipe of the engine; a control unit for driving the tank-venting valve so that it closes or opens; a pressure difference sensor for measuring the pressure difference between the pressure in the tank and the ambient pressure; and, an integrating unit for determining the time integral of the pressure difference. With this tank-venting arrangement, a simple and reliable determination can be made as to when so much fuel vapor should have been adsorbed in the active charcoal filter so that when the tank-venting valve is opened thereafter, a lean correction by means of a lambda controller can be required. If this lean correction is not made, this is an indication that the fuel flowing from the tank has not reached the tank-venting valve so that the tank-venting arrangement leaks or is obstructed.
    • 排气装置包括:罐; 连接到罐的吸附过滤器; 将吸附过滤器与发动机的进气管相连接的排气阀; 控制单元,用于驱动所述排气阀使其关闭或打开; 压力差传感器,用于测量罐中的压力与环境压力之间的压力差; 以及用于确定压力差的时间积分的积分单元。 通过这种排气装置,可以简单可靠地确定当活性炭过滤器吸附多少燃料蒸汽时,当其后打开排气阀时,借助于 可以使用lambda控制器。 如果没有进行精益校正,这表明从罐中流出的燃料没有到达排放阀,以致于排气装置泄漏或被阻塞。