Precombustion And Main Combustion Chambers In Series Patents (Class 123/253)
- With ignition means in connecting passage (Class 123/287)
- Having fuel, a combustible mixture, or air added in the connecting passage (Class 123/288)
- Fluid flow through passage controlled by working piston (Class 123/289)
- With valve means or variable orifice means in the passage (Class 123/292)
- Having multiple passages (Class 123/293)