Method for improving effective thermal efficiency of engine and power transmission mechanism prepared through same

Abstract

The invention discloses a method for improving effective thermal efficiency of an engine and a power transmission mechanism prepared through the method. An eccentric distance is set between each crankshaft axis in the power transmission mechanism of the engine and the connection end axis between a piston rod and a corresponding crank connecting rod or between each crankshaft axis and the connection end axis between the pin shaft center on each piston and the corresponding crank connection rod. The power transmission mechanism is large in power increase amplitude, oil consumption is saved, andexhaust contaminant is low; power is high, and the torque is large; the working stroke is accelerated, combustion and increase of the compression ratio are facilitated, and the heat loss is reduced; the number of parts is small, and the production cost is low; the length of the connection rods can be reduced, and the overall mechanism is compact; when crankshafts rotate in a negative offset manner, lubricating oil splashed through the crankshafts can face pistons all the time, a piston cylinder body is good in lubrication, heat dissipation of engine oil to the pistons is high, the work intensity of the engine is large, the service life is long, and the like.

Description

technical field [0001] The invention relates to an engine, and relates to a method for improving the effective thermal efficiency of the engine and a power transmission mechanism prepared therefor. Background technique [0002] Various engine power transmission mechanisms that have been disclosed at present all convert the reciprocating motion of the piston into rotary motion through the crank-connecting rod mechanism and the crankshaft, and the crankshaft is driven by the piston-connecting rod to perform work. Among these structures, there are single-crankshaft and double-crankshaft structures, and specifically, non-biased and biased structures. Although the engine power transmission mechanisms of these structures have their own advantages, their shortcomings still exist. For example, there are alternating side pressures between the piston and the cylinder wall of the unbiased engine of the single crankshaft structure, which affects the friction between the piston and the c...

AI Technical Summary

Problems solved by technology

Although the engine power transmission mechanisms of these structures have their own advantages, their shortcomings still exist. For example, there are alternating side pressures between the piston and the cylinder wall of the unbiased engine of the single crankshaft structure, which affects the friction between the piston and the cylinder liner. Power consumption, statistics show that this kind of friction power consumption accounts for about 75% of the mechanical loss of the engine, and the friction power consumption of the cylinder liner and piston ring accounts for 50% of the piston connecting rod system. Therefore, in order to reduce the pressure on the side of the piston, the crankshaft is usually used However, it can be seen from the disclosed technical solutions that the offset crankshaft structure can generally eliminate the side pressure of the engine piston and cylinder wall, reduce friction and vibration, because those skilled in the art believe that the power stroke is when the crankshaft rotates The greater the proportion of the angle, the more work is done, so the crankshaft-connecting-rod mechanism only rotates in the direction of positive bias to do work

However, these engine power transmission mechanisms arranged in a positive bias manner have a small increase in the effective thermal efficiency of the engine

Images