A Miniature Free Piston Generator

Abstract

The invention provides a miniature free piston generator. The miniature free piston generator comprises a stator and magnetic pistons. The pistons are a magnetic opposite-arranging piston. Stator windings and an excitation winding are arranged on the wall surface of the stator. The magnetic pistons are symmetrically arranged in the stator. A left magnetic piston is positioned between a first pressure chamber and a first air inlet cavity, a right magnetic piston is positioned between a second pressure chamber and a second air inlet cavity, an intermediate piston is positioned in a combustion chamber, and a combustion chamber exhaust port is formed in the symmetric position of the combustion chamber. A piston rod connected with the intermediate piston and the left magnetic piston is a firstreducing rod, and the first pressure chamber is enabled to communicate or block from the combustion chamber through the movement of the pistons. A piston rod connected with the piston rod of the intermediate piston and the right magnetic piston is a second reducing rod. The second pressure chamber is enabled to communicate or block from the combustion chamber through the movement of the pistons. The miniature free piston generator realizes the process of air intake from the air inlet cavities to the pressure chambers and ensures the filling of air inlet.

Description

technical field [0001] The invention relates to the field of internal combustion engines or the field of power generation, in particular to a miniature free-piston generator. Background technique [0002] The free piston engine is a new type of engine developed gradually in recent years. It cancels the crank connecting rod mechanism of the traditional engine, and the piston only moves in a reciprocating linear motion. The movement law of the piston is determined by the operating conditions of the engine. Because the free piston engine has a simple structure and is easy to miniaturize, the miniaturized free piston engine has become another new research field in the world. The mechanical structure of the micro free piston engine does not have the crank connecting rod, valve and other mechanisms of the traditional internal combustion engine, and the free piston is not constrained by mechanical force in the cylinder, so it has very high work performance. Due to the limitation o...

AI Technical Summary

Problems solved by technology

Conventional engines with conventional sizes already have relatively mature technologies for the utilization of exhaust gas preheating, such as exhaust gas turbocharging technology, exhaust gas temperature differential power generation technology, etc., but these technologies are not suitable for miniaturized power plants

In addition, in all the current published patents, the exhaust gas treatment part of the micro power device is not considered

Most of the existing micro-free-piston generator designs adopt the method of air intake boosting by external devices. This design makes the device less integrated and requires external work.

There are also a small number of designs that use optimized device structure layout to realize the intake process of the micro-generator. For example, the Chinese patent uses an air guide tube to connect the pressure chamber to the air inlet, and the combustion chamber and the pressure chamber generate negative pressure to achieve air intake. However, in this design, due to two The end piston lacks a rigid connection and the actual gas is compressible, so the pressure rise in the pressure chamber is not obvious, and then the intake boost effect is not obvious

Secondly, in this design, the exhaust gas preheating intake system is arranged inside the device, which is not conducive to the development of miniaturization; moreover, when the exhaust gas passes through the narrow exhaust pipe, it will lose a large part of its heat, making the exhaust gas Poor preheat intake effect

Another example is that the Chinese patent design fails to consider the micro-engine scavenging process, so the exhaust effect of this design is poor, and the combustion exhaust gas is easy to remain in the combustion chamber, which affects the working ability of the device

In addition, the design does not consider the recycling and treatment of high-temperature exhaust gas, resulting in energy waste and environmental pollution.

Images