GF07.04-P-6101CY Component Description For an Oxygen Sensor

GF07.04-P-6101CY Component Description For An Oxygen Sensor
- up to model year 08

Component Identification:

Oxygen sensors upstream of catalytic converter (KAT) are screwed into the exhaust pipe upstream of the firewall catalytic converter.

Task
Oxygen sensors upstream of TWC (control sensors) detect the residual oxygen content in exhaust gas for the following tasks:
^ Lambda control
^ Self-adjustment of mixture formation
^ Function chain test (for OBD II or EOBD)

Design

Component Identification:

The oxygen sensors upstream of TWC are insulated as voltage free and designed a planar (flat) wideband oxygen sensors
The active sensor ceramic consists of a gas permeable ceramic body made of zirconium dioxide. The inner protective tube with several slots protects the ceramic body from mechanical stresses and from temperature jumps.

Component Identification:

The balance resistor (6) is dependent on the overall length (L) and on the type of sensor.

While changing a wideband oxygen sensor, the balance resistor is already fitted on the new sensor and must not be changed (resistance depends on the sensor).

Component Identification:

The sensor element consists of a combination of a Nernst concentration cell (sensor cell) and an oxygen pump cell which transports (pumps) the oxygen ions.
The pump action is a purely physical process.

When operating in combination with control electronics which are housed in the ME-SFI [ME] control unit N3/10, the wideband oxygen sensor can be measured exactly in a further lambda range ( Lamda 0.7 to 4.0).

Sensor heating
The integrated sensor heater ensures that it remains at the required operating temperature of approx. 750 °C. In order achieve the sensor function while the engine is running, wideband oxygen sensors are heated constantly with a heat output of about 10 W.
The sensor heaters are actuated by the ME-SFI [ME] control unit by means of a ground signal.