Optical Engine Indication - ICOS
LaVision’s Internal Combustion Optical Sensors (ICOS) measure crank angle resolved air/fuel ratio, exhaust gas concentration, EGR-rate and gas temperature directly inside the cylinder. The optical sensor is integrated into a spark plug, a glow plug or positioned at any other in-cylinder location using M5-probes. Transmission probes are available for path integrated cross-cylinder measurements.
ICOS System
Optical indication of fuel density, lambda value, CO2 and EGR-rate
ICOS-CNC System
Optical indication of CNG fuel density and lambda value
ICOS-Temperature System
Optical indication of gas temperature and H2O concentration
ICOS Probes
Engine probes for ICOS systems
ICOS system specifications and application fields
| System | ICOS | ICOS-CNG | ICOS-Temperature |
|---|---|---|---|
| Indicated quantities | Fuel density, air/fuel ratio CO2 concentration, EGR-rate |
Fuel density, air/fuel ratio (CNG, methane) |
Gas temperature, H2O concentration |
| Acquisition rate | 30 kHz ( 33.3 µs response time) |
23 kHz ( 43.5 µs response time) |
|
| Measurement accuracy* |
Fuel density: < 2% CO2 concentration: < 0.2vol% |
CNG concentration: < 5% | Gas temperature < 20K H2O concentration: < 0.2vol% |
| Sensor probes | M12 / M14 spark plug probe, M5 indication probe (selection of engine adapters), cooled indication probe, line-of-sight probe |
||
| Applications | Mixture preparation, stability of the combustion process | ||
| Direct injection Cold start Load changes Ignition behaviour Internal and external EGR Multiple cylinder EGR distribution |
Gas engines CNG / methane fuel Dual fuel |
Validation Downsizing EGR Water injection HCCI |
|
*Please refer to product data sheets for measurement ranges and detection limits.
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