Internal Combustion Optical Sensor System
LaVision's innovative Internal Combustion Optical Sensor (ICOS) measures crank angle resolved fuel (lambda-values) or exhaust gas concentrations directly in the combustion chamber of internal combustion engines under real fuel conditions.Ultra fast detector probes measure the fuel density (ICOS-Fuel) and/or the exhaust gas concentration (ICOS-EGR).
Firing (spark plug) and non-firing probes are available. The spark plug probe has M12 or M14 threads and do not need any further engine modification. A non firing M5 sensor can be used for standard bores of the engine.
Applications
- air/fuel ratio
- investigation of highly dynamic engine conditions, cold start, stratified operation
- verifying injection strategies and systems
- internal and external EGR-rates over consecutive cycles
- distribution of EGR between different cylinders
- validation of engine simulation models
Sensor Specifications
| Measuring principle: | IR absorption
|
| Measured quantities: | fuel density (air/fuel ratio) and/or exhaust gas concentration (EGR-rate) |
| Precision: | < 2 % |
| Data rate: | 30 kHz |
| Dynamics: | 14 bit |
| Data acquisition: | crank angle resolved multiple cycles |
For further information you can download an abstract of an article from the MTZ magazine under publications/engines: T. Berg, V. Beushausen, O. Thiele, H. Voges: Fiber Optics Spark Plug Sensor for the Optimization of Engine combustion processes..
crank angle resolved fuel and exhaust concentration profiles together with cylinder pressure during cold start