公开(公告)号：US5298865A

公开(公告)日：1994-03-29

申请号：US872810

申请日：1992-04-24

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

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

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

CPC classification number: F02D41/1495 ,  G01N27/4065 ,  G01N27/4175

Abstract: 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.

Abstract translation: 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：US5209060A

公开(公告)日：1993-05-11

申请号：US738621

申请日：1991-07-31

Applicant: Klaus Hirschmann ,  Lothar Raff ,  Eberhard Schnaibel

Inventor： Klaus Hirschmann ,  Lothar Raff ,  Eberhard Schnaibel

IPC: F01N9/00 ,  F01N11/00 ,  F02D41/14 ,  F02D45/00

CPC classification number: F02D41/1441 ,  F01N11/007 ,  F02D41/1479 ,  F02D41/1487 ,  F01N2550/02 ,  Y02T10/47

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US4594984A

公开(公告)日：1986-06-17

申请号：US755213

申请日：1985-07-15

Applicant: Lothar Raff ,  Hans-Martin Wiedenmann

Inventor： Lothar Raff ,  Hans-Martin Wiedenmann

IPC: F02D41/34 ,  F02D33/00 ,  F02D41/14 ,  F02P5/14 ,  F02P5/155 ,  F02M7/12 ,  F02B3/08 ,  F02B33/00 ,  F02D5/02

CPC classification number: F02D41/1475 ,  F02D41/1479

Abstract: A regulating device is proposed for the mixture composition of an internal combustion engine having a signal sensor and having regulating ranges which can be switched over between lambda equals one and the lean range. The lambda-equal-to-one regulation is effected by means of a two-point regulator and the lean regulation is effected either via an altered set-point value of the two-point regulator or with the aid of a steady regulator. The transitions between the two types of regulation take a course dependent on a selectable function, in order to avoid abrupt changes in rpm. A switchover is also made to controlled operation for a brief period at the beginning of each type of regulation.

Abstract translation: 提出了一种调节装置，用于具有信号传感器的内燃机的混合组成，其具有可在等于1和稀的范围之间切换的调节范围。 通过两点调节器实现λ等于一的调节，并且通过两点调节器的改变的设定值或借助于稳定调节器来实现贫调节。 两种类型的调节之间的转换取决于可选择的功能，以避免rpm的突然变化。 在每种类型的调节开始时，也进行了短时间的控制操作。

公开(公告)号：US4463594A

公开(公告)日：1984-08-07

申请号：US377604

申请日：1982-05-13

Applicant: Lothar Raff ,  Hans-Martin Wiedenmann

Inventor： Lothar Raff ,  Hans-Martin Wiedenmann

IPC: F02D41/14 ,  F23N5/00 ,  G01N27/26 ,  G01N27/409 ,  G01N31/00 ,  F02B3/08

CPC classification number: F02D41/1481

Abstract: To compensate for temperature-dependent shift on the operating characteristics of an oxygen ion conductive sensor which tends to shift the operating characteristics towards the "lean" range (.lambda.>1) at low temperature, and towards the "rich" range (.lambda.

Abstract translation: 为了补偿氧离子传导传感器的操作特性的温度依赖性变化，其倾向于在低温下将工作特性向“贫”范围（λ> 1）移动，并且朝向“富”范围（λ<1） ），从传感器导出的脉冲被延迟或移位，使得代表从偏移到丰富方向的脉冲的后沿延迟地传输; 依赖于温度，从丰富到精益的转变也延迟传递。 通过具有可变时间延迟的定时电路（9,14）获得延迟，时间延迟由通过感测传感器的a-c电阻导出的温度信号（9a）控制，由高通滤波器分流并整流。 通过将第一定时级（9）延迟脉冲的后沿或缩短脉冲，从而延迟由第二定时电路（14）产生脉冲前沿的脉冲，各个脉冲被逻辑地组合 取决于比较器（18）相对于例如300℃-400℃设定点的温度水平确定的温度。