Subcritical steam auxiliary power gasoline engine

Abstract

The invention relates to a subcritical vapor auxiliary work done gasoline engine which comprises a water injector in a cylinder of the gasoline engine, wherein, the water injector comprises a water tank, an electric control unit, and water pumps, a water guideway, a water injection nozzle and a temperature sensor which are controlled by the electric control unit. The water injector is characterized in that the water pumps comprise a low pressure water pump and a high pressure water pump pressurizing water to be above 200bar, the low pressure water pump is arranged in the water tank and is communicated with the high pressure water pump, the high pressure water pump is communicated with the water guideway by a high pressure water pipe, the water injection nozzle is communicated with the water guideway, and a water injection opening extends into a combustion chamber of the gasoline engine. The gasoline engine also comprises a gasoline engine exhaust pipe used for heating water to above 250 DEG C and not more than 374.2 DEG C, and a high pressure water pipe penetrates through the exhaust pipe and then is communicated with the water guideway. The gasoline engine utilizes the waste heat of engine tail gas to do work circularly, thereby saving oil; the temperature of water injected into the cylinder is in a subcritical state, and the water is instantaneously vaporized in the cylinder under the pressure condition, thereby increasing the explosion pressure of the cylinder; and the torque output and the power are improved under the premise that the oil injection amount is not increased.

Description

technical field [0001] The invention belongs to a combustion engine with a device for adding water or steam to gas, fuel or fuel-air mixture, and particularly relates to a subcritical steam-assisted work gasoline engine. Background technique [0002] When the gasoline engine is working, the air and gasoline mixture are generally sucked into the cylinder, or gasoline is sprayed into the cylinder to mix during the intake stroke. High, the pressure increases, pushing the piston to do work. Since the working medium of the gasoline engine only includes combustion products of gasoline and air, and no other expansion medium is added, the temperature in the cylinder is high, and harmful substances such as nitrogen and nitrogen compounds are easily generated; the cooling system has a heavy burden; the possibility of knocking increases, which is not conducive to realizing more Large compression ratio; high exhaust gas temperature, high temperature resistance and strength requirements...

AI Technical Summary

Problems solved by technology

Since the working medium of the gasoline engine only includes combustion products of gasoline and air, and no other expansion medium is added, the temperature in the cylinder is high, and harmful substances such as nitrogen and nitrogen compounds are easily generated; the cooling system has a heavy burden; the possibility of knocking increases, which is not conducive to realizing more Large compression ratio; high exhaust gas temperature, high temperature resistance and strength requirements for the material of the exhaust passage near the combustion chamber; a large amount of heat energy is dissipated through the exhaust and cooling system, not only is not converted into power, but consumes power (consumed by use) more powerful fans and water pumps); the thermal efficiency of the gasoline engine in the prior art is less than one-third, and in the cylinder, the chemical energy released by the chemical reaction of gasoline and oxygen, one-third passes through the cylinder wall, piston, The cylinder head and the cooling system of the gasoline engine are taken away, and one-third is taken away by the exhaust gas in the form of heat; the thermal efficiency is low, and the energy waste is more

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