The Apogee advanced diagnostic Thermal Imaging System (TIS), in use since 2008, has been successfully applied to experimental and production gasoline reciprocating engines. Tests have been conducted on both port and direct injected fuel systems that operate in normally aspirated and highly boosted conditions. Flame visualization images and movies are obtained of spark plugs, inlet and exhaust valves, and bore walls and the combustion gases in engines operating up to wide open throttle (WOT) / full load conditions. The TIS has been able to capture pre-ignition events for both conventional and GTDI engines. The TIS apparatus is also used to obtain spatially-resolved, non-contact temperature measurements of the various engine components. The WOT conditions encountered include gas temperatures exceeding 3000 degrees K and 200 atmospheres pressure. The technology has also been implemented in advanced gas turbine engines with great success measuring components applicable to a turbine design under the most severe of conditions.
The TIS measures with exceptional fidelity the infrared radiation emitted from internal component surfaces as well as the gases utilizing Apogee proprietary and confidential designs. The TIS equipment consists of a custom optical probe assembly that allows access to the engine or combustor. The acquired information passes through selected spectral filtering to a specialized detector equipped with a high-speed digital output IR focal plane array detector. All of the components are highly ruggedized and capable of withstanding the most severe of applications.
• Breakthrough component temperature and
visualization measurement of advanced turbine
engine blades and combustion chambers operating
at various loads and pressure
• Accurate spatially-resolved temperature
measurement of an engine's spark plugs, injectors,
intake and exhaust valves, piston heads, and bore
• Flame visualization to evaluate a reciprocating engine
components' performances at operations up to Wide
Open Throttle (WOT) / full load conditions