公开(公告)号：US4345562A

公开(公告)日：1982-08-24

申请号：US148435

申请日：1980-05-09

申请人： Ulrich Drews ,  Peter Werner ,  Werner Mohrle

发明人： Ulrich Drews ,  Peter Werner ,  Werner Mohrle

IPC分类号： F02D41/14 ,  G01N27/04 ,  G01N27/26 ,  G01N27/409 ,  F02B3/00 ,  F02B33/00

CPC分类号： F02D41/148

摘要： A method and an apparatus for regulating the fuel-air ratio of the operational mixture of an internal combustion engine and for monitoring the operational readiness of a .lambda. sensor controlling the regulating apparatus and functioning according to the principle of ionic conduction in fixed electrolytes. A constant reference voltage which approximately corresponds to the average sensor output voltage is connected opposite to the .lambda. sensor. The level of the resultant voltage thus established, the values of which are disposed symmetrically relative to the reference voltage, is utilized, along with the cooperation of a resultant electric current which causes a voltage drop across the temperature-dependent internal resistance of the .lambda. sensor as a gauge for the operational readiness of the .lambda. sensor. The pickup of the resultant voltage is accomplished by two comparison devices, whose logically evaluatable output signals are transformed via a logical linkage circuit into an operational readiness or unreadiness signal. A third comparison device serves the purpose of controlling the regulating apparatus. The third comparison device output is switched when the .lambda. sensor is not under the influence of any resultant electric current; as a result, no temperature-dependent shift of the switchover point relative to the internal sensor voltage occurs and regulation can be effected with the regulating apparatus in a temperature in dependent manner to a desired point in the sensor voltage curve or to a desired lambda value.

摘要翻译： 一种用于调节内燃机的操作混合物的燃料空气比的方法和装置，并且用于监测控制调节装置的λ传感器的操作准备情况以及根据固定电解质中的离子传导原理的功能。 大致对应于平均传感器输出电压的恒定参考电压与λ传感器相对。 这样建立的所得到的电压的电平，其值相对于参考电压对称设置，以及所得到的电流的协调，其导致跨越λ传感器的依赖于温度的内部电阻的电压降 作为λ传感器的操作准备的量规。 所得到的电压的拾取由两个比较装置实现，两个比较装置的逻辑可评估输出信号通过逻辑联动电路变换成操作就绪或不准备信号。 第三比较装置用于控制调节装置。 当λ传感器不受任何所得电流的影响时，第三比较器件输出被切换; 因此，不会发生切换点相对于内部传感器电压的温度相关的偏移，并且可以通过调节装置以与传感器电压曲线中的期望点相对应的温度或所需的λ值来实现调节 。

公开(公告)号：US4284050A

公开(公告)日：1981-08-18

申请号：US87899

申请日：1979-10-24

申请人： Wadym Suchowerskyj ,  Peter Werner ,  Hans Schnurle ,  Werner Mohrle ,  Urlich Drews

发明人： Wadym Suchowerskyj ,  Peter Werner ,  Hans Schnurle ,  Werner Mohrle ,  Urlich Drews

IPC分类号： F02D41/14 ,  F02M51/00

CPC分类号： F02D41/1482

摘要： An apparatus for the open-loop or closed-loop control of the composition of the mixture desired in the combustion chamber of an internal combustion engine, which includes an exhaust gas sensor whose output signal together with other operational parameters, determines the mixture composition. The essential component of the apparatus is a storage unit with which charging and discharging sources controllable in accordance with the sensor signal are associated, wherein the magnitude of the charging and discharging signal is dependent on operational parameters. The storage unit may comprise a capacitor or a resistor-capacitor combination having one terminal connected to ground and another terminal efficiently connected with an operational voltage connection, so as to have in this manner an unequivocal association with a fixed potential.

摘要翻译： 一种用于在内燃机的燃烧室中期望的混合物的组成的开环或闭环控制的装置，其包括其输出信号与其它操作参数一起确定混合物组成的排气传感器。 装置的基本部件是与传感器信号可控的充电和放电源相关联的存储单元，其中充电和放电信号的大小取决于操作参数。 存储单元可以包括电容器或电阻器 - 电容器组合，其具有连接到地的一个端子和与操作电压连接有效连接的另一个端子，以便以这种方式具有与固定电位的明确关联。

公开(公告)号：US4393841A

公开(公告)日：1983-07-19

申请号：US276760

申请日：1981-06-24

申请人： Ulrich Drews ,  Peter Werner ,  Werner Mohrle

发明人： Ulrich Drews ,  Peter Werner ,  Werner Mohrle

IPC分类号： F02D41/14 ,  G01N27/406 ,  F02B3/08

CPC分类号： F02D41/148 ,  G01N27/4065

摘要： A device is proposed for regulating the fuel-air ratio in the operating mixture of an internal combustion engine and for monitoring the operational readiness of a .lambda. sensor controlling the regulating device and functioning by the principle of ion conduction in solid electrolytes. The .lambda. sensor has an adjustable, constant reference voltage switched opposite to it. The reference voltage approximately equals the average sensor output voltage. The level of the resultant voltage, which is established with the aid of the resultant current and has values located symmetrically with respect to the reference voltage, is monitored by comparator devices. The output signal of the comparator devices is logically processed and furnishes a signal as to the operational readiness of the sensor. In order to generate the reference voltage, a voltage divider branch having high resistance is disposed parallel to a voltage divider branch of relatively low resistance; the latter voltage divider branch further serves to establish the threshold values of the comparator devices. Because it is independent of the current draw of the comparator devices, the desired reference voltage can be adhered to very precisely, and thus the desired regulating point at which closed-loop control or regulation begins of the regulating device can also be adhered to very precisely.

摘要翻译： 提出了一种用于调节内燃机的操作混合物中的燃料空气比的装置，并且用于监测控制调节装置的λ传感器的操作准备状态并且通过固体电解质中的离子传导原理起作用。 λ传感器具有可调节的恒定参考电压，与此相反。 参考电压大致等于传感器的平均输出电压。 借助于所得到的电流并且具有相对于参考电压对称设置的值的合成电压的电平由比较器装置监视。 对比较器装置的输出信号进行逻辑处理，并提供关于传感器运行准备状态的信号。 为了产生参考电压，具有高电阻的分压器支路平行于相对低电阻的分压器分支布置; 后一分压器分支进一步用于建立比较器器件的阈值。 由于它与电流比较器不同，所以可以非常精确地遵循所需的参考电压，因此也可以非常精确地遵循调节装置的闭环控制或调节开始的期望调节点 。