METHOD OF OPERATION OF INTERNAL COMBUSTION ENGINE Russian patent published in 2000 - IPC

FIELD: automotive industry and mechanical engineering. SUBSTANCE: proposed method comes to suction of fuel-air mixture into cylinder with piston, compression of mixture at two following stages, ignition and combustion. Fuel-air mixture of increased mass is delivered into cylinder at a pressure of PO = 2.3 - 6.2 arm and then two-stage compression of fuel-air mixture at nonisentropic conditions is provided with increase of entropy. For this purpose cylinder is used divided by cross partition made to provide bypassing of fuel-air mixture. At the first stage of compression, with piston moving towards partition, fuel-air mixture is heated by compression to temperature of T₁ = (1,3-1,8)T₀ where T₀ is initial temperature of fuel-air-mixture. Then heated fuel-air mixture is bypassed into cylinder space behind the partition, and second stage of compression of fuel-air mixture of increased mass is carried out with piston moving to top dead center until temperature rises to T_c = (2-3)T₀ and pressure to P_c comparable with final temperature and pressure of standard single-stage compression with subsequent ignition and combustion of fuel-air mixture. EFFECT: increased specific power and economy of internal combustion engine without increasing mechanical loads.