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1.发明授权
公开(公告)号：US5291873A
公开(公告)日：1994-03-08
申请号：US895550
申请日：1992-06-08
CPC分类号： F02D41/1486 , F02D41/1483
摘要： The invention is directed to a method for determining the particular current value of at least one control parameter for a lambda control of an internal combustion engine which provides a shift to make the fuel mixture lean or a shift to make the fuel mixture rich in dependence upon the operating state of the controlled engine. The method includes the steps of: determining a base value for the control parameter in dependence upon the current value of at least one pregiven operating variable as the current value applies for a control with a minimal discharge of toxic gas during steady-state operation of the engine; and, modifying the base value with a transition variable having a value decaying as a function of time when changes in the operating state of the engine occur. The method of the invention affords the advantage that the control parameter does not have a value which was applied for a minimum discharge of toxic gas for a typical operation sequence at steady-state or transient operation; instead, for steady-state and transient operations, optimized values are available. In this way, a discharge of exhaust gas is obtained which is lower compared to possibilities which have existed up until now.
摘要翻译： 本发明涉及一种用于确定内燃机的λ控制的至少一个控制参数的特定电流值的方法，所述控制参数提供了使燃料混合物偏离或使燃料混合物富集的变化 受控发动机的运行状态。 该方法包括以下步骤：根据至少一个预定操作变量的当前值来确定控制参数的基值，因为当前值适用于在稳态运行期间具有最小排放有毒气体的控制 发动机; 以及当发生发动机的运行状态发生变化时，用具有衰减作为时间的函数的值的转换变量来修改基值。 本发明的方法提供的优点是，在稳态或瞬态操作中，控制参数不具有用于典型操作顺序的有毒气体的最小排放的值; 相反，对于稳态和瞬态操作，可以使用优化值。 以这种方式，获得与迄今为止存在的可能性相比较低的废气排放。
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公开(公告)号：US5787867A
公开(公告)日：1998-08-04
申请号：US816377
申请日：1997-03-13
CPC分类号： F02D41/1481 , F02D41/1441 , F02D41/1475 , F02D41/1482 , F02D2041/1422
摘要： The invention is directed to a method for controlling the composition of the air/fuel mixture for an internal combustion engine. In the method, the mean value of the control oscillation is influenced via a change of the delay times tv with which a sign reversal of the actuating variable change is delayed. The dead time of the control is determined from the time-dependent performance of the control actuating variable and is considered for the change of the delay times tv.
摘要翻译： 本发明涉及一种用于控制用于内燃机的空气/燃料混合物的组成的方法。 在该方法中，控制振荡的平均值通过延迟时间tv的变化而受到影响，延迟时间tv与致动变量改变的符号反转延迟。 控制的死区时间根据控制执行变量的时间依赖性能确定，并考虑延迟时间tv的变化。
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3.发明授权Method for adjusting the fuel/air mixture for an internal combustion engine after an overrun phase of operation 失效在运行超载阶段之后调节内燃机的燃料/空气混合物的方法
公开(公告)号：US5438826A
公开(公告)日：1995-08-08
申请号：US144009
申请日：1993-11-01
CPC分类号： F02D41/0295 , F02D41/123 , F02D41/126 , F02D41/1475
摘要： The invention is directed to a method for reducing the exhaust-gas emissions of an internal combustion engine which is equipped with a lambda control and a catalytic converter and for which the metering of fuel can be interrupted in dependence upon operating parameters. The method is characterized in that the engine at first is operated with a rich fuel/air mixture during transition from operation without fuel metering to operation with fuel metering. The oxygen deficiency associated therewith compensates the oxygen excess which is stored in the catalytic converter when the metering of fuel is interrupted. An operating state wherein oxygen is loaded therefore occurs quickly after a fuel cutoff. This operating state also defines an optimum at steady state and this is advantageous especially for the conversion of nitrogen oxide.
摘要翻译： 本发明涉及一种减少内燃机的废气排放的方法，所述内燃机配备有λ控制和催化转化器，根据操作参数可对燃料计量进行中断。 该方法的特征在于，在从没有燃料计量的操作转变到具有燃料计量的操作的过程中，发动机首先具有丰富的燃料/空气混合物。 与此相关的缺氧补偿当燃料计量中断时储存在催化转化器中的氧气过剩。 因此，加载氧的操作状态在燃料切断之后迅速发生。 该操作状态也在稳定状态下定义最佳，这对于氮氧化物的转化是有利的。
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4.发明授权
公开(公告)号：US5209060A
公开(公告)日：1993-05-11
申请号：US738621
申请日：1991-07-31
CPC分类号： F02D41/1441 , F01N11/007 , F02D41/1479 , F02D41/1487 , F01N2550/02 , Y02T10/47
摘要： The invention relates to a method for the continuous lambda control of an internal combustion engine 13 having a catalyzer. The method is carried out by generating a control oscillation FS of pregiven amplitude at least in pregiven operating conditions. This method is based on the recognition that with an increase in amplitude of the control oscillation, the conversion window becomes wider insofar as a maximum amplitude is not exceeded. The conversion window is that range of lambda values wherein the conversion exhibits at least a pregiven quality.
摘要翻译： 本发明涉及一种用于连续λ控制具有催化剂的内燃机13的方法。 该方法通过至少在预制操作条件下产生预制振幅的控制振荡FS来进行。 该方法基于这样的认识：随着控制振荡的幅度的增加，转换窗口变得更宽，只要不超过最大幅度。 转换窗口是λ值的范围，其中转换表现出至少一个优先的质量。
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公开(公告)号：US5586543A
公开(公告)日：1996-12-24
申请号：US372937
申请日：1995-01-17
IPC分类号： F02D41/14
CPC分类号： F02D41/1481 , F02D41/1477
摘要： A mixture controller for adjusting an output value, which is outputted by a PI two-point controller, to control the air/fuel ratio of a mixture supplied to an internal combustion engine to a pregiven value. The engine produces an exhaust-gas flow during operation and has an oxygen probe mounted in the exhaust-gas flow. The mixture controller continuously detects the signal of the oxygen probe to obtain sequential measurement values of the signal. A check is made as to whether a currently detected measurement value of the signal has crossed over a threshold value in the lean or rich direction compared to the previously detected measurement value of the signal. The output value is changed when a crossover of the signal in the lean direction is present by shifting the output value with a large step via a P-jump in the rich direction and starting an integration of the output value in the rich direction from a previous lean direction. The output value is also changed when a crossover of the signal in the rich direction is present by stopping the integration of the output value in the rich direction and starting an integration in the lean direction after a pregiven delay time has elapsed. The operation of the mixture controller is returned to checking after the output value has changed. A return of the operation of the mixture controller to the checking operation is inhibited until an inhibit time has elapsed.
摘要翻译： 一种用于调节由PI两点控制器输出的输出值以将提供给内燃机的混合物的空燃比控制为预定值的混合控制器。 发动机在运行期间产生废气流，并且具有安装在废气流中的氧探头。 混合控制器连续检测氧探头的信号，以获得信号的连续测量值。 检查当前检测到的信号测量值是否与先前检测到的信号测量值相比，在贫或富方向上超过阈值。 当通过在富方向上的P跳跃以大步进移位输出值并且从丰富方向的输出值的累积开始从前一个的丰富方向的积分时，输出值在倾斜方向上的信号的交叉存在时改变 倾斜方向 当通过在累积方向之后停止输出值的积分并且在经过预先设定的延迟时间之后开始在倾斜方向上的积分，当存在丰富方向上的信号的交叉时，输出值也改变。 混合控制器的运行在输出值发生变化后返回检查。 将混合控制器的操作返回到检查操作被禁止，直到经过禁止时间。
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公开(公告)号：US20050029096A1
公开(公告)日：2005-02-10
申请号：US10888295
申请日：2004-07-09
CPC分类号： H01H1/605 , Y10T307/924
摘要： A method and an electronic circuit for regenerating an electrical contact are provided in order to remedy the problem of electrical contacts becoming highly resistive over time. Electrical contacts become highly resistive over time, particularly when the contacts are thermally highly stressed and/or exposed to corrosive gases. To remedy this undesired effect and to reestablish the low resistance of the contacts, an electrical regenerating signal is applied to these contacts.
摘要翻译： 提供一种用于再生电触头的方法和电子电路，以便补救电触头随时间变得高度阻力的问题。 电触点随时间变得高度阻力，特别是当触点受到高度的高应力和/或暴露于腐蚀性气体时。 为了补救这种不良影响并重新建立触点的低电阻，电再生信号被施加到这些触点。
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7.发明授权
公开(公告)号：US5291417A
公开(公告)日：1994-03-01
申请号：US684896
申请日：1991-04-22
IPC分类号： G01N27/409 , F02D41/14 , G01N27/406 , G06F15/20 , G01R27/00
CPC分类号： G01N27/4065 , F02D41/1476
摘要： The internal resistance of a lambda probe is determined by: the application of a clocked direct-current counter voltage to the probe via a series resistor; the measurement of the output voltages with the counter voltage connected and disconnected; and, the calculation of the internal resistance from the measured values and known resistance values.Apart from the components of a conventional arrangement, this method requires only a series resistor and a switch for implementation. Measurement can be carried out at short time intervals without excessively high direct-current voltage loading which affects the service life.The internal resistance measured is compared with a desired resistance and the control deviation determined in this way is used to determine the duty factor for probe heating clocked with fixed frequency.
摘要翻译： PCT No.PCT / DE89 / 00638 Sec。 371日期1991年04月22日 102（e）日期1991年4月22日PCT提交1989年10月6日PCT公布。 出版物WO90 / 04778 日期为1990年5月3日.λ探针的内阻由下式确定：通过串联电阻将时钟脉冲的直流电压施加到探头; 输出电压的测量与反电压连接断开; 以及根据测量值和已知电阻值计算内部电阻。 除了常规布置的部件之外，该方法仅需要串联电阻器和用于实现的开关。 测量可以在短时间间隔内进行，而不会导致过高的直流电压负载，从而影响使用寿命。 将所测量的内电阻与期望的电阻进行比较，以这种方式确定的控制偏差用于确定以固定频率计时的探头加热的占空比。
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公开(公告)号：US5224345A
公开(公告)日：1993-07-06
申请号：US679050
申请日：1991-05-09
IPC分类号： F02D41/14
CPC分类号： F02D41/1441 , F02D41/1456
摘要： An arrangement for lambda control operates on an internal combustion engine (11) comprising a catalytic converter (12) and a lambda probe (13.v) mounted in front of the catalytic converter and a lambda probe (13.h) mounted behind the catalytic converter. The arrangement integrates by means of an integration means (15) the difference between the actual lambda value measured by the rear probe and the lambda desired value to which controlling is to be effected. The integration value is used as control desired value for a means (16) for lambda control. This arrangement and the associated method make it possible to control to the actually wanted lambda desired value even if the front lambda probe carries out incorrect measurements, for example because of hydrocarbons in the exhaust gas in front of the catalytic converter or, in the case of continuous-action control, faulty linearization of the probe characteristic.
摘要翻译： PCT No.PCT / DE89 / 00164 Sec。 371日期1991年5月9日 102（e）日期1991年5月9日PCT 1989年3月17日PCT公布。 出版物WO90 / 05240 日期为1990年5月17日。用于λ控制的布置在内燃机（11）上操作，所述内燃机（11）包括催化转化器（12）和安装在催化转化器前面的λ探针（13.v）和λ探针（13。 h）安装在催化转化器后面。 该装置通过积分装置（15）集成由后探针测量的实际λ值与要进行控制的λ期望值之间的差值。 积分值被用作用于λ控制的装置（16）的控制期望值。 即使前面的λ探针执行不正确的测量，例如由于催化转化器前面的废气中的碳氢化合物，或者在 连续动作控制，探针特性线性化故障。
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公开(公告)号：US5036819A
公开(公告)日：1991-08-06
申请号：US477976
申请日：1990-04-30
CPC分类号： F02D41/1477 , F02D2041/1409 , F02D41/1441
摘要： A control system for controlling the air/fuel ratio in an internal combustion engine 10, in which an oxygen probe (lambda probe) 13 is arranged in the exhaust gas of the internal combustion engine 10, has a control device 12 for continuous control. The actual value of the air ratio lambda is determined via a measured probe output voltage in conjunction with an at least approximately predetermined probe-characteristic relationship 16 between the value of the probe output voltage and the value of the air ratio lambda associated therewith. After forming the difference of desired value and actual value of the air ratio lambda, the air/fuel ratio is controlled on the basis of this difference. Such a control system is used primarily in order to reduce the total emission of the main pollutant components of the exhaust gas of an internal combustion engine. In particular in the case of an internal combustion engine 10 with catalytic converter arranged in the exhaust gas, a maintenance of the air ratio lambda as accurate as possible necessary for optimum efficiency of the catalytic converter (lambda=1) is assured.
摘要翻译： PCT No.PCT / DE88 / 00659 Sec。 371日期1990年04月30日 102（e）日期1990年4月30日PCT提交1988年10月26日PCT公布。 WO 89/4424 PCT公开号 日本1989年5月18日。一种用于控制内燃机10中的空燃比的控制系统，其中在内燃机10的排气中配置氧探头（λ探针）13，具有控制装置 12连续控制。 空气比λ的实际值通过测量的探头输出电压以及探针输出电压的值与与之相关联的空气比λ的值之间的至少近似预定的探针特性关系16来确定。 在形成空气比λ的期望值和实际值的差之后，基于该差来控制空燃比。 这种控制系统主要用于减少内燃机废气的主要污染物成分的总排放量。 特别是在具有设置在废气中的催化转化器的内燃机10的情况下，确保尽可能准确地维持催化转化器（λ= 1）的最佳效率所需的空气比λ。
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公开(公告)号：US07109721B2
公开(公告)日：2006-09-19
申请号：US10888295
申请日：2004-07-09
IPC分类号： G01R31/327 , H01H1/60
CPC分类号： H01H1/605 , Y10T307/924
摘要： A method and an electronic circuit for regenerating an electrical contact are provided in order to remedy the problem of electrical contacts becoming highly resistive over time. Electrical contacts become highly resistive over time, particularly when the contacts are thermally highly stressed and/or exposed to corrosive gases. To remedy this undesired effect and to reestablish the low resistance of the contacts, an electrical regenerating signal is applied to these contacts.
摘要翻译： 提供一种用于再生电触头的方法和电子电路，以便补救电触头随时间变得高度阻力的问题。 电触点随时间变得高度阻力，特别是当触点受到高度的高应力和/或暴露于腐蚀性气体时。 为了补救这种不良影响并重新建立触点的低电阻，电再生信号被施加到这些触点。
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