The invention relates to a
gasoline engine for a complete internal cooling
hybrid electric automobile. The
gasoline engine comprises an engine body, a cooling water
system and an inlet gas
combustion system, wherein the cooling water
system comprises a water spraying system composed of a pure water tank, a
water supply pump and a
nozzle, and a cooling water recycling system composed of an exhausting valve, a multifunctional room, a recycling water pump, a
water filter, a high-level water inlet box and a
water treatment system; the multifunctional room is internally provided with expansion, silencing and condensation devices; the
water treatment system is internally provided with an AO (Anoxic Oxic) membrane; the
water supply amount of the
water supply pump is adjusted through a rack; the
nozzle can be used for distinguished cooling on a cylinder body and a cylinder cover. The temperature of the
gasoline engine provided by the invention is lower than cylinder wall temperature of a common gasoline engine so that the final expansion and exhausting temperature is reduced; meanwhile, when the inlet gas
combustion system provided by the invention is used, the highest
temperature and pressure are higher than those of the common gasoline engine in a
combustion process, so that the gasoline engine researched by the invention can obtain heat efficiency which is higher than that of the common gasoline engine.