Adjustable swash plate variable displacement engine without crankshaft

Abstract

The invention discloses an adjustable tilting tray type crankshaft-free variable displacement engine which comprises an engine body, a main shaft, tilting tray mounting seats, tilting trays, a tilting tray adjusting mechanism, a piston air cylinder assembly, a valve control mechanism and the like. The tilting tray adjusting mechanism converts main shaft rotation into three-dimensional swing of the tilting trays around the center of a movement pair formed by connecting the tilting trays and the tilting tray mounting seats, and a connection rod is utilized to drive the piston air cylinder assembly to complete thermotechnical cycle; meanwhile, the tilting tray adjusting mechanism adjusts the tilting angle of the tilting trays according to the positions of the tilting trays so as to change the air cylinder work volume, and the distance between an upper stop point and the top of an air cylinder and the distance between a lower stop point and the top of the air cylinder are made to meet the thermotechnical cycle compression ratio; the main shaft drives the valve control mechanism to rotate, and opening / closing control over a valve assembly of the piston air cylinder assembly is achieved so that a valve and a piston air cylinder can work in a coordinate mode. By means of the adjustable tilting tray type crankshaft-free variable displacement engine, dynamic adjustment of engine displacement is achieved, the engine is always maintained to be in the best compression ratio, thermotechnical cycle efficiency is greatly improved, mechanical efficiency of the engine is improved, and oil consumption and emission of the engine are lowered.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an adjustable swash plate type engine with no crankshaft and variable displacement. Background technique [0002] In modern automobiles, shipping, and various power equipment, connecting rod crankshaft engines are the most widely used. [0003] 1. The traditional crankshaft and connecting rod engine is subject to a fixed crank radius and piston stroke. The engine can only achieve the best working condition under fixed working conditions. [0004] For gasoline engines: it must be near the optimum air-fuel ratio in order to ensure good ignition performance, combustion efficiency, and minimum pollution emissions; at the same time, the combustion characteristics of gasoline determine that the boost ratio should not be too large. Therefore, the gasoline engine must work with the best air-fuel ratio mixture under the available maximum boost condition to be in the best working conditi...

AI Technical Summary

Problems solved by technology

The radial force on the piston will cause the friction force of the piston and cylinder, which will reduce the mechanical efficiency of the system; it will also cause the deformation of the piston and cylinder, reduce the air tightness of the piston and cylinder combination, and put forward higher requirements for the material and technology of the cylinder and piston; the diameter of the piston Transmitting the shock to the entire engine will also form lateral vibration

In addition, when the working pressure of the cylinder is the highest, since the crank and the connecting rod are almost 180 degrees, the torque output is relatively small.

[0007] 3. The cylinder bore stroke ratio of the traditional crankshaft piston engine remains unchanged, and the engine adaptability is poor

Due to the fixed bore-to-stroke ratio, once the design parameters are set, the optimal working condition of the engine cannot be adjusted, so that the engine design can only be made according to the requirements of key working conditions

[0008] 4. The crank length of a traditional crankshaft piston engine = piston stroke / 2, a larger piston stroke will inevitably require a larger crank length, and a larger crank length will inevitably require a larger crankcase

The valve control camshaft is different from the crankshaft, which requires a complex transmission coordination structure, resulting in a large volume and complex structure of the crankshaft and valve control system, which increases the volume, weight and cost of the engine

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