Novel engine without crankshaft and control method thereof

Abstract

The invention provides a novel engine without a crankshaft. The novel engine is composed of not less than two power cylinders, and includes the power cylinders, secondary expansion gas passages between the power cylinders, an impulse type lubrication system, a fuel injection system, a cylinder body temperature control system, an oxygen injection system, a ventilation system, a starting system, anECU and a power output system. A power cylinder using outputting reciprocating linear motion performed by pistons in the cylinders as a basic function is used as a unit, through the secondary expansion gas passages, exhaust gas in the power cylinder near the end of doing work by combustion expansion is introduced into another power cylinder piston under the compression stroke for secondary expansion work, and the combination of oil cooling and air cooling is adopted, the heat at the tops of the power cylinders is brought to the bottoms of the power cylinders through a double-layer spiral cooling liquid pipe to improve the secondary expansion work capability of the gas to improve the thermal efficiency of the engine, and finally, power output adopts a planetary gear mechanism to convert thereciprocating linear motion into a continuous rotary motion.

Description

technical field [0001] The invention belongs to the field of engines, relates to two-stroke engine technology, and is a two-stroke engine technology for improving engine expansion and working ability and improving engine thermal efficiency. Background technique [0002] How to improve the thermal efficiency of the engine is a research topic with a history of 100 years, and it is also an enduring research hotspot, such as: Atkinson (Atkinson) cycle engine, Miller (Mill) cycle engine, etc. Thermal mode or constant volume exothermic mode to increase the expansion volume of high-temperature and high-pressure gas to realize super-expansion engine cycle. [0003] Due to the limitations of the traditional engine structure, no matter it is a four-stroke engine or a two-stroke engine, it is impossible to pass gas with higher temperature and higher pressure into the space formed under the piston, and the working medium cannot continue to expand to do work on the piston, which is serio...

AI Technical Summary

Problems solved by technology

[0003] Due to the limitations of the traditional engine structure, no matter it is a four-stroke engine or a two-stroke engine, it is impossible to pass gas with higher temperature and higher pressure into the space formed under the piston, and the working medium cannot continue to expand to do work on the piston, which is serious. Restricted further improvement of engine combustion efficiency

[0004] On the other hand, because the exhaust gas discharged by the traditional engine still has a relatively high temperature and high pressure, it has a certain potential to do work. Therefore, the exhaust gas turbocharging technology and the compound engine technology are adopted to use the energy of the exhaust gas to drive the turbine to rotate. Increase the intake pressure of the engine or directly transmit the rotational torque of the turbine to the crankshaft of the engine to increase the output power of the engine, but it is still very difficult to achieve a major breakthrough and increase in engine efficiency

[0005] At the same time, since the nitrogen and oxygen in the air participate in the combustion of the engine mixture, nitrogen oxides are inevitably formed. Although the traditional engine has adopted many technologies to control the emission of nitrogen oxides, it not only affects the fuel economy of the engine, It is also difficult to fundamentally eliminate the discharge of this pollutant

[0006] In addition, traditional engines have complex structures, many components, and high manufacturing costs. How to reduce engine emissions and improve engine thermal efficiency while taking technical measures to reduce engine costs is also a topic that the engine manufacturing industry has always paid attention to.

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