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 (e.g.at idle).
  • Flexibility of installation, considerable latitude regarding mounting methods.
  • Efficient functioning depends led on exhaust-gas temperature.
  • Lambda control comes into effect more quickly after theengine starts.
  • mproved exhaust-gas figures due to improved sensor dynamics.
  • Reduced danger of contamination leads to longer service life.

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

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 and provides the sensor element with highly effective protection against excessive thermal and 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

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.

  • Control also possible at λ > I&λ < I
  • Continuous Lambda control at λ = I
  • Diesel-engine control
  • Lean-burn concept for SI engines
  • Gas-engine control
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