ENGINE WITH SPLITTED CYCLE (VERSIONS) Russian patent published in 2014 - IPC F02B23/06 F02B33/22 F02B41/00 F02F3/26 

FIELD: engines and pumps.

SUBSTANCE: proposed engine 10 comprises crankshaft, expansion cylinder 14 with axial line 62, expansion piston 30 with top surface and outer perimeter, cylinder head 33 arranged above expansion cylinder 33 so that cylinder head bottom surface faces top surface 50 of expansion piston 30. Cylinder head 33 comprises transition cannel outlet 27 and discharge channel inlet. Discharge channel inlet and transition channel outlet 27 are arranged nearby expansion cylinder 14. Transition channel 22 communicates high-pressure gas source with expansion cylinder 14 via transition channel outlet 27. Transition expansion valve 26 is arranged in transition channel outlet 27 to communicate transition channel 22 with expansion cylinder 14 in expansion cycle. Exhaust valve 34 is arranged at exhaust channel inlet 31. Exhaust valve 34 communicates with expansion cylinder 14 or, therefrom, via discharge channel inlet 31 during expansion cycle. Recess 60 is located at top surface 50 of expansion piston 30 and includes bottom surface. Section of recess 60 covers the transition channel discharge section 27. Discharge channel inlet section 31 does not cover none section of recess 60. Recess depth is 1 to 3 times larger than expansion piston clearance. Said expansion piston clearance is the minimum distance along the line parallel with axial line 62 between expansion piston top surface 50 and cylinder head bottom surface 33 when expansion piston is at TDC. Recess depth represents the minimum distance along the line parallel with axial line 62 between recess bottom surface and expansion piston top surface 50. Invention covers the engine design version.

EFFECT: optimum fuel-air ratio above ignition plugs.

15 cl, 5 dwg