Lots of experiments can be conducted on a RCM platform. This post aims to gather the schematic of the experimental setups.
Briefly, the RCM has a stroke of 500 mm and a combustion chamber bore of 50.8 mm. A spark plug was used to ignite the mixture in every RCM experiment, which mimicked the pre-ignition.
A quartz end-window, which could tolerate extremely high pressure and pressure oscillation, was used to allow optical access to the entire combustion chamber in the axial direction.
The combustion images were recorded using a high-speed camera (Photron SA-X2) with a 50 mm lens (Nikon Micro Nikkor 1:2.8G) with spatial resolution of 128 × 128 pixels and 288,000 frames per second (fps).
The pressure was measured using a flush mounted piezoelectric sensor (Kistler 6125C) and a charge amplifier (Kistler 5018A).
The spark plug (Denso K20R) was mounted at the opposite side of the pressure sensor with electrodes located in the center of the combustion chamber.
The spark plug and high-speed camera were triggered based on the combustion chamber pressure, and the timing was controlled within 1 ms after the end of compression for different cases.