公开(公告)号：US5205263A

公开(公告)日：1993-04-27

申请号：US865923

申请日：1992-04-09

申请人： Andreas Blumenstock ,  Helmut Denz ,  Werner Mezger ,  Ernst Wild

发明人： Andreas Blumenstock ,  Helmut Denz ,  Werner Mezger ,  Ernst Wild

IPC分类号： G01M3/26 ,  B60K15/035 ,  F02M25/08 ,  G01M15/04

CPC分类号： F02M25/0809 ,  B60K15/03504

摘要： The invention is directed to a method of checking a tank-venting apparatus for a motor vehicle equipped with a fuel tank and an internal combustion engine having an intake pipe. The apparatus includes an adsorption filter having a venting end and an intake end, a supply line connecting the intake end to the tank and a connecting line interconnecting the intake pipe of the engine and the intake end of the adsorption filter. A tank-venting valve is mounted in the connecting line between the intake pipe and the intake end of the adsorption filter and a drive unit for actuating the tank-venting valve. The method includes the steps of: changing the open state of the tank-venting valve when a pregiven operating state range of the engine is present; detecting the difference pressure between the pressure at the intake end of the adsorption filter and the ambient pressure; checking if the difference pressure or the end value of the difference pressure change lies in a predetermined range after the open state of the tank-venting valve is changed; and, issuing a fault announcement if neither the difference pressure, the time constant of the difference pressure change nor the end value of the difference pressure change lies in said predetermined range. The invention utilizes the realization that the difference pressure is based on the gas flow into and out of the adsorption filter. The difference pressure drops when the outflow is clogged or when there is a leak. On the other hand, the difference pressure increases when the inflow is clogged. In this way, the operability of the tank-venting apparatus can be checked in a simple manner.

摘要翻译： 本发明涉及一种检查装备有燃料箱的机动车辆的排气装置和具有进气管的内燃机的方法。 该装置包括具有通气端和进气端的吸附过滤器，将进气端连接到油箱的供给管线和将发动机的进气管与吸附过滤器的进气端相连的连接管线。 排气阀安装在进气管和吸附过滤器的进气端之间的连接管路中，以及用于致动排气阀的驱动单元。 该方法包括以下步骤：当存在发动机的预定运行状态范围时改变通气阀的打开状态; 检测吸附过滤器吸入端的压力与环境压力之间的差压; 检查在压力变化的打开状态发生变化之后，差压变化的差压或者结束值是否在规定的范围内， 以及如果差压，差压变化的时间常数和差压变化的结束值都不在所述预定范围内，则发出故障通知。 本发明利用差压是基于进入和离开吸附过滤器的气体流量的认识。 当流出物堵塞或泄漏时，差压力下降。 另一方面，当流入物堵塞时，差压增加。 以这种方式，可以以简单的方式检查罐排放装置的可操作性。

公开(公告)号：US5442551A

公开(公告)日：1995-08-15

申请号：US989026

申请日：1993-03-11

申请人： Helmut Denz ,  Ernst Wild ,  Andreas Blumenstock

发明人： Helmut Denz ,  Ernst Wild ,  Andreas Blumenstock

IPC分类号： B60K15/035 ,  F02D35/00 ,  F02M25/08 ,  G01M3/26 ,  F02M33/02 ,  G01M15/00

CPC分类号： G01M3/26 ,  B60K15/03504 ,  F02M25/0809

摘要： 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.

摘要翻译： 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。

公开(公告)号：US5255515A

公开(公告)日：1993-10-26

申请号：US981844

申请日：1992-11-25

申请人： Andreas Blumenstock ,  Ernst Wild ,  Helmut Denz ,  Klaus Ries-Muller

发明人： Andreas Blumenstock ,  Ernst Wild ,  Helmut Denz ,  Klaus Ries-Muller

IPC分类号： F01N3/20 ,  F01N11/00 ,  F02B77/08 ,  F02D35/00 ,  G01M15/04 ,  G01N33/00 ,  F07N3/20

CPC分类号： F01N11/007 ,  F01N2550/02 ,  Y02T10/47

摘要： 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.

摘要翻译： 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。

公开(公告)号：US5666925A

公开(公告)日：1997-09-16

申请号：US647757

申请日：1996-05-15

申请人： Helmut Denz ,  Ernst Wild ,  Andreas Blumenstock ,  Georg Mallebrein

发明人： Helmut Denz ,  Ernst Wild ,  Andreas Blumenstock ,  Georg Mallebrein

IPC分类号： G01M3/24 ,  B60K15/077 ,  F02M25/08 ,  F02M37/00 ,  G01M3/26 ,  F02M37/04

CPC分类号： F02M25/0809

摘要： 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.

摘要翻译： 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。

公开(公告)号：US5460141A

公开(公告)日：1995-10-24

申请号：US246518

申请日：1994-05-20

申请人： Helmut Denz ,  Ernst Wild ,  Andreas Blumenstock

发明人： Helmut Denz ,  Ernst Wild ,  Andreas Blumenstock

IPC分类号： F02M25/08 ,  F02M33/02

CPC分类号： F02M25/0809

摘要： 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.

摘要翻译： 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。

公开(公告)号：US5220896A

公开(公告)日：1993-06-22

申请号：US811526

申请日：1991-12-20

申请人： Andreas Blumenstock ,  Helmut Denz ,  Ulrich Steinbrenner ,  Ernst Wild

发明人： Andreas Blumenstock ,  Helmut Denz ,  Ulrich Steinbrenner ,  Ernst Wild

IPC分类号： F02B77/08 ,  B60K15/035 ,  F02M25/08 ,  F02M37/00

CPC分类号： B60K15/03504

摘要： 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.

摘要翻译： 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。

公开(公告)号：US5197442A

公开(公告)日：1993-03-30

申请号：US811294

申请日：1991-12-20

申请人： Andreas Blumenstock ,  Helmut Denz ,  Ulrich Steinbrenner ,  Ernst Wild

发明人： Andreas Blumenstock ,  Helmut Denz ,  Ulrich Steinbrenner ,  Ernst Wild

IPC分类号： B60K15/077 ,  B60K15/035 ,  F02M25/08 ,  F02M37/00

CPC分类号： B60K15/03504 ,  F02M25/0818

摘要： A tank-venting arrangement includes: a tank having a tank closure; an electrically drivable check valve; an adsorption filter; connecting lines for interconnecting the above components; a difference pressure sensor which measures the pressure difference between the pressure in the tank and the ambient pressure and supplies a pressure difference signal; a comparator which, at least for a running engine, compares the pressure difference signal to upper and lower threshold values and supplies an opening signal to the check valve to open the latter when the pressure difference signal is greater than the upper threshold value and a closure signal for closing the check valve when the pressure difference signal drops below the lower threshold value; and, a detector unit which supplies an opening signal to the check valve for opening the check valve when the sensor determines a possible opening of the tank and a closure signal for closing the check valve when the sensor determines a possible closure of the tank. With the aid of the check valve and the difference pressure sensor which measures the pressure difference between the pressure in the tank and the ambient pressure, the tank-venting arrangement can be so operated that at least for a running engine, a desired maximum overpressure in the tank can be obtained relative to the ambient pressure independently of the extent of the underpressure in that part of the arrangement forward of the check valve.

摘要翻译： 排气装置包括：具有罐盖的罐; 电驱动止回阀; 吸附过滤器; 用于连接上述部件的连接线; 差压传感器，其测量罐中的压力与环境压力之间的压力差，并提供压力差信号; 比较器，其至少对于运行的发动机，将压力差信号与上限和下限阈值进行比较，并且当压力差信号大于上限阈值时，向止回阀提供打开信号以打开后者， 当压力差信号下降到低于阈值时关闭止回阀的信号; 以及检测器单元，当传感器确定罐的可能打开时，检测器单元向打开止回阀的打开信号提供打开信号，以及当传感器确定罐可能关闭时关闭止回阀的关闭信号。 借助于止回阀和差压传感器，该差压传感器测量罐中的压力与环境压力之间的压力差，罐排气装置可以如此操作，使得至少对于运行的发动机来说，期望的最大超压在 可以独立于止回阀向前的布置部分的负压程度，相对于环境压力获得罐。

公开(公告)号：US5298865A

公开(公告)日：1994-03-29

申请号：US872810

申请日：1992-04-24

申请人： Helmut Denz ,  Werner Mezger ,  Johannes-Dieter Wichterich ,  Ernst Wild ,  Joachim Heimes ,  Eugen Joos ,  Lothar Raff ,  Eberhard Schnaibel

发明人： Helmut Denz ,  Werner Mezger ,  Johannes-Dieter Wichterich ,  Ernst Wild ,  Joachim Heimes ,  Eugen Joos ,  Lothar Raff ,  Eberhard Schnaibel

IPC分类号： G01N27/409 ,  F02D41/14 ,  G01N27/406 ,  G01N27/417 ,  G01R31/02 ,  F01N3/00 ,  F02M7/00

CPC分类号： F02D41/1495 ,  G01N27/4065 ,  G01N27/4175

摘要： The invention is directed to a connecting circuit for a potential-free lambda probe having a ground line and a signal line and having an offset voltage source which is connected to the ground line. This offset voltage source raises the potential of the ground line to a pregiven value relative to ground. A ground short is directly detectable in the connecting circuit of the invention in that the potential measured at the signal line drops below the offset voltage. In this way, it is no longer required as in conventional circuits to check for a ground short by enriching the mixture of an engine and to monitor the exhaust gas with the lambda probe.

摘要翻译： 本发明涉及一种具有接地线和信号线的无电位λ探针的连接电路，并且具有连接到接地线的偏移电压源。 该偏移电压源将地线的电位提高到相对于地的预定值。 在本发明的连接电路中可以直接检测到接地短路，因为在信号线处测量的电位降到偏移电压以下。 以这种方式，不再像传统电路那样通过富集发动机的混合物并用λ探测器监测排气来检查地面短路。

公开(公告)号：US5765538A

公开(公告)日：1998-06-16

申请号：US793581

申请日：1997-05-15

申请人： Erwin Krimmer ,  Helmut Denz ,  Wolfgang Schulz ,  Ernst Wild ,  Winfried Kuhnt ,  Helmut Schwegler ,  Andreas Blumenstock ,  Tilman Miehle ,  Manfred Zimmermann

发明人： Erwin Krimmer ,  Helmut Denz ,  Wolfgang Schulz ,  Ernst Wild ,  Winfried Kuhnt ,  Helmut Schwegler ,  Andreas Blumenstock ,  Tilman Miehle ,  Manfred Zimmermann

IPC分类号： C12N15/02 ,  A61K35/407 ,  A61K38/00 ,  A61K38/17 ,  A61P35/00 ,  B23K26/08 ,  C07K14/47 ,  C12P21/08 ,  C12R1/91 ,  F01D25/28 ,  F02C7/00 ,  F02M25/08 ,  F04B43/04 ,  F04B45/047 ,  F04B49/24 ,  F23R3/60 ,  F02M37/04

CPC分类号： C07K14/4703 ,  F01D25/285 ,  F02M25/0818 ,  F04B43/04 ,  F04B45/047 ,  F04B49/24 ,  F23R3/60 ,  A61K38/00 ,  B23P2700/13

摘要： A pump device for performing a leak diagnosis of a fuel vapor retention system. The pump device is provided for a fuel vapor retention system of an internal combustion engine, having a pump membrane driven by an electromagnet and a magnetic armature, which membrane defines a supply chamber that has valve devices, wherein a first valve can be connected to ambient air via a delivery line and can be connected via a second valve to a feed pipe that has an adsorption filter, and having a stop valve between the delivery line and the feed pipe, which valve is embodied so that it can be electromagnetically actuated. The pump device according to the invention is provided for a fuel vapor retention system of an internal combustion engine.

摘要翻译： PCT No.PCT / DE96 / 00815 Sec。 371日期1997年5月15日 102（e）日期1997年5月15日PCT提交1996年5月10日PCT公布。 公开号WO97 / 02421 日期1997年1月23日用于执行燃料蒸汽保持系统的泄漏诊断的泵装置。 该泵装置设置用于内燃机的燃料蒸气保持系统，其具有由电磁体和磁性衔铁驱动的泵膜，该膜限定具有阀装置的供应室，其中第一阀可以连接到环境 空气经由输送管线并且可以经由第二阀连接到具有吸附过滤器的进料管，并且在输送管线和进料管之间具有截止阀，该阀被实施为使得其可以被电磁致动。 根据本发明的泵装置被提供用于内燃机的燃料蒸汽保持系统。

公开(公告)号：US5372117A

公开(公告)日：1994-12-13

申请号：US119144

申请日：1993-09-22

申请人： Helmut Denz ,  Ernst Wild ,  Andreas Blumenstock

发明人： Helmut Denz ,  Ernst Wild ,  Andreas Blumenstock

IPC分类号： F02D41/00 ,  F02M25/08 ,  F02M37/00 ,  F02D41/14

CPC分类号： F02M25/08 ,  F02D41/004 ,  F02M25/0809

摘要： A method for alternately carrying out phases with and without tank venting during operation of an internal combustion engine equipped with a tank-venting assembly is characterized in that the ratio of the time spans with and without tank venting is selected to be dependent upon operating data of the engine or of the tank-venting assembly. Preferably, a variable is measured which is a measure for the fuel quantity to be regenerated during tank venting and the above-mentioned ratio is increased in favor of the tank-venting time span with respect to the base ratio when the value of the measured variable exceeds an upper limit (Dp.sub.-- SMW; FTEA.sub.-- SWU). This method makes possible that an adsorption filter and a tank-venting valve in the corresponding arrangement can be dimensioned for lesser throughput quantities than previously without the danger being present that fuel vapors escape to the ambient. The tank-venting time span is extended with respect to the base-adaptation time span when a large amount of fuel vapor occurs whereby the smaller adsorption filter still regenerates satisfactorily notwithstanding the reduced cross section of the tank-venting valve.

摘要翻译： PCT No.PCT / DE92 / 00127 Sec。 371日期：1993年9月22日 102（e）日期1993年9月22日PCT 1991年3月21日PCT公布。 公开号WO92 / 16734 日期：1992年10月1日。一种用于在配备有排气组件的内燃机的操作期间交替执行具有和不具有罐排气的相的方法，其特征在于，选择具有和不具有罐排气的时间跨度的比率 取决于发动机或排气组件的操作数据。 优选地，测量变量，其是在罐排放期间要再生的燃料量的量度，并且当测量的变量的值为相对于基准比时，上述比率增加，有利于通气时间跨度 超过上限（Dp-SMW; FTEA-SWU）。 这种方法使得相应布置中的吸附过滤器和通气阀的尺寸可以确定为比以前更少的通过量，而不存在燃料蒸气逸出到环境中的危险。 当发生大量燃料蒸汽时，相对于基础适应时间跨度延长了排气时间跨度，由此尽管减压阀的横截面减小，但较小的吸附过滤器仍然令人满意地再生。