公开(公告)号：US20130234744A1

公开(公告)日：2013-09-12

申请号：US13687141

申请日：2012-11-28

Applicant: MAGNETI MARELLI S.P.A.

Inventor： Piero Maria Carbonaro ,  Marco Ceroni

IPC: G01R31/02 ,  G01M15/10

CPC classification number: G01R31/024 ,  F02D41/1456 ,  F02D41/1494 ,  F02D41/1495 ,  F02D2041/2089 ,  F02D2041/2093 ,  G01M15/104 ,  G01N27/4175

Abstract: A method performs a diagnosis of a lambda sensor of a “UEGO” type of an exhaust system for an internal-combustion engine. The lambda sensor includes a series of pins. The diagnosis method comprises steps of: heating the lambda sensor to cause the lambda sensor to reach an inner temperature that is higher than about 600° C.; polarizing a first one of the pins by connecting the first pin to a supply voltage through a first limiting resistance; measuring a voltage of all of the pins while the first pin is connected to the supply voltage; and diagnosing a presence of a short circuit to an electrical ground if the voltage of at least one of the pins is lower than a predetermined threshold. A control unit performs the diagnosis.

Abstract translation: 一种方法执行用于内燃机的“UEGO”型排气系统的λ传感器的诊断。 λ传感器包括一系列引脚。 诊断方法包括以下步骤：加热λ传感器以使λ传感器达到高于约600℃的内部温度; 通过经由第一限制电阻将第一引脚连接到电源电压来使第一引脚偏振; 当第一引脚连接到电源电压时，测量所有引脚的电压; 以及如果所述至少一个引脚的电压低于预定阈值，则诊断与所述电气接地的短路的存在。 控制单元执行诊断。

公开(公告)号：US09128139B2

公开(公告)日：2015-09-08

申请号：US13687141

申请日：2012-11-28

Applicant: Magneti Marelli S.p.A.

Inventor： Piero Maria Carbonaro ,  Marco Ceroni

IPC: G01R31/00 ,  G01R31/02 ,  G01N27/417 ,  G01M15/10 ,  F02D41/14 ,  F02D41/20

CPC classification number: G01R31/024 ,  F02D41/1456 ,  F02D41/1494 ,  F02D41/1495 ,  F02D2041/2089 ,  F02D2041/2093 ,  G01M15/104 ,  G01N27/4175

Abstract: A method performs a diagnosis of a lambda sensor of a “UEGO” type of an exhaust system for an internal-combustion engine. The lambda sensor includes a series of pins. The diagnosis method comprises steps of: heating the lambda sensor to cause the lambda sensor to reach an inner temperature that is higher than about 600° C.; polarizing a first one of the pins by connecting the first pin to a supply voltage through a first limiting resistance; measuring a voltage of all of the pins while the first pin is connected to the supply voltage; and diagnosing a presence of a short circuit to an electrical ground if the voltage of at least one of the pins is lower than a predetermined threshold. A control unit performs the diagnosis.

Abstract translation: 一种方法执行用于内燃机的“UEGO”型排气系统的λ传感器的诊断。 λ传感器包括一系列引脚。 诊断方法包括以下步骤：加热λ传感器以使λ传感器达到高于约600℃的内部温度; 通过经由第一限制电阻将第一引脚连接到电源电压来使第一引脚偏振; 当第一引脚连接到电源电压时，测量所有引脚的电压; 以及如果所述至少一个引脚的电压低于预定阈值，则诊断与所述电气接地的短路的存在。 控制单元执行诊断。

公开(公告)号：US10203299B2

公开(公告)日：2019-02-12

申请号：US15238068

申请日：2016-08-16

Applicant: MAGNETI MARELLI S.p.A.

Inventor： Matteo Bosio ,  Piero Maria Carbonaro ,  Fausto Calcagno

IPC: G01N27/406 ,  G01N27/407 ,  F01N13/00 ,  F01N13/08 ,  F02M35/10 ,  G01N27/409

Abstract: A control circuit for a single-cell linear oxygen sensor having a first and a second electrical terminals on which a first voltage and respectively a second voltage are present, wherein a cell current between the first and second electrical terminals is indicative of a detected oxygen concentration, and wherein the control circuit generates a biasing voltage between the first and the second electrical terminals with a preset pattern as a function of the cell current. The circuit envisages: a transresistance block, coupled to the second electrical terminal to generate a processed voltage as a function of the cell current and based on the preset pattern; and an adder stage, coupled to the transresistance block and to the second electrical terminal, to perform a sum between the processed voltage and the second voltage, to generate the first voltage for the first electrical terminal of the linear oxygen sensor, so that the biasing voltage has the preset pattern as a function of the cell current.