Method for diagnosing electrical contact connection of an exhaust gas sensor
A technology of exhaust sensor and electrical contact, which is applied in the direction of electric control of exhaust treatment devices, exhaust treatment, testing of electrical devices in transportation, etc., to achieve the effect of simple cost
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[0018] figure 1 A schematic diagram of a device CA for performing the diagnosis according to the invention on the electrical contact of an exhaust gas sensor LS in the form of a linear exhaust gas sounder is shown.
[0019] The exhaust gas sensor LS includes a pump unit PZ as a first unit and a reference unit RZ as a second unit. The pump unit PZ is interconnected between the first terminal 1 and the second terminal 2 of the exhaust gas sensor. The reference unit RZ is interconnected between the second terminal 2 and the third terminal 3 of the exhaust gas sensor LS. These devices are the minimal configuration of an oxygen sensor. exist figure 1 , an optional balancing resistor R3 is shown in dashed lines, the balancing resistor R3 being arranged between the first terminal 1 and the fourth terminal 4 . The balancing resistor R3 is used to compensate for manufacturing tolerances of the probe, ie the resistance value of the pump unit PZ.
[0020] The device CA comprising al...
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