SOL-GEL TiO2 COMBUSTION SENSOR: ON-BOARD EXPERIMENTALS AND COMPARISON WITH COMMERCIAL LAMBDA PROBE

The aim of this work is to carry out a performance comparison between a commercial Bosch Lambda probe and a sol-gel TiO2 thin film deposited an alumina substrates. Actually, zirconia based lambda probes are a well-established technology in the field of combustion control in fuel injection engines. An experimental bench was realized in order to perform contemporary data acquisition of a Bosch lambda probe Mod. LSF 4.2 and a TiO2 thin film sensors. The signals of both sensors is acquired with an electrometer with scanner card on real gasoline engine. Fast response time is observed from TiO2 sol-gel sensor, while best results were obtained from first experimental data on Pt doped devices, that outline response time comparable with commercial probe.