Oxygen Sensors[SJ Auto Co., Ltd.]

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Heated Lambda Sensor LSH

• Versions
  Bosch has a number of versions of its heated lambda sensor available
  - 3-pole version
  - 3-pole version with additional grounding by cable
  - 3-pole version with additional grounding by cable, for lean-burn
• Applications (LSM II), And
  - 4-pole version, isolated ground
• Advantages
  - Efficient closed-loop control even at low exhaust-gas temperatures
  - Flexibility of installation, considerable latitude regarding mounting methods.
  - Lambda control comes into effect more quickly after the engine starts.
  - Improved exhaust-gas figures due to improved sensor dynamics.
  - Reduced danger of contamination leads to longer service life.

Planar Lambda Sensor LSF

From the construction viewpoint, the major differences between the LSF sensor & the LSH

• Sensors are as follows
  The LSF sensor element is fixed in the sensor housing by means of a ceramic seal packing.
  The double-wall protective tube was specially designed for the planar sensor & provides the sensor element with highly effective protection against excessive thermal & mechanical stresses.
• Special Characteristics
  - Short start-up times for the Lambda closed-loop control.
  - Stable control characteristics
  - Lower heater rating
  - Small size
  - Low weight & Isolated-ground design

Planar Broadband Lambda Sensor LSU

Special control electronics are required for the LSU sensor (evaluation circuit).
This contains not only the internal control electronics for the pump & sensor cells as required for generation of the sensor signal, but also the control electronics for controlling the sensor's temperature. As a result, novel applications become possible.

• Diesel-engine control
• Lean-burn concept for SI engines
• Gas-engine control