Axial opposed piston tubular cam drive type five stroke engine

Abstract

The invention discloses an axial opposed piston tubular cam drive type five stroke engine. The axial opposed piston tubular cam drive type five stroke engine comprises a tubular engine body, air cylinders, pistons and a bottom seat, and is characterized in that the pistons are tubular, a left piston and a right piston which are oppositely arranged are arranged in each air cylinder, an air inlet, an air outlet, an oil nozzle and a spark plug ignition mouth are arranged between each left piston and each right piston, an inner side rotation roller and an outer side rotation roller are arranged in an L-shaped step mouth at the outer end of each piston, tubular cams are arranged at two ends of a center rotation main shaft, a track curve mouth of each tubular cam is clamped into a space between the inner side rotation roller and the outer side rotation roller, arranged on the L-shaped step mouth of each corresponding piston, and the left pistons and the right pistons are driven to move through the track curve mouths. The axial opposed piston tubular cam drive type five stroke engine not only has advantage of oppositely placing the pistons, but also can effectively improve cycle thermal efficiency, reduce exhaust temperature, improve fuel efficiency, and improve volume power, and is simple in structure, convenient to implement and convenient to design.

Description

technical field [0001] The invention relates to an improvement of an engine, in particular to a five-stroke engine driven by an axially opposing piston and cylinder cam. Background technique [0002] An engine is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (gasoline engines, etc.), external combustion engines (Stirling engines, steam engines, etc.). At present, the main structural form of the internal combustion engine is a reciprocating piston engine, including four-stroke and two-stroke. The linear motion of the piston is converted into rotary motion through the crank connecting rod mechanism; the body is a cuboid, and the cylinders are arranged in a row. The cover is provided with air intake holes and exhaust holes in the cylinder head. Although this kind of engine is widely used, the following deficiencies are also found in operation: one is low efficiency, gasoline engine efficiency is generally 25%~35%...

AI Technical Summary

Problems solved by technology

Although this kind of engine is widely used, the following deficiencies are also found in operation: one is low efficiency, gasoline engine efficiency is generally 25%~35%, diesel engine efficiency is generally 35%~45%; Mechanism, the vibration of the machine is large, and a balance mechanism is required. The four-stroke engine is equipped with a complex valve mechanism. The disadvantage of the two-stroke engine is that the exhaust gas remains and consumes fuel. About 35% of the engine power loss is taken away by the exhaust gas. The internal combustion engine is the most efficient engine in the heat engine, but only a small part of the heat generated by the combustion of the fuel entering the engine becomes useful work, and most of the rest is due to various reasons. Lost; the fourth is the four-stroke cycle, there is only one piston in the cylinder, that is, downward suction, upward compression, ignition and explosion make the piston do work downward, and exhaust upward, so that the four strokes require the crankshaft to rotate twice, and only do work once; the crank With the connecting rod structure, the stroke of each stroke is consistent and fixed. At the end of the power stroke, the exhaust gas starts to be discharged, and the discharge temperature is high, taking away a large part of the heat, accounting for about 35% of the total heat of fuel combustion; All four-stroke engines have complex valve trains

[0003] In order to improve the deficiencies existing in the current engine, it can be seen through searching that there are many reports, such as Chinese patent 201310068195.9 discloses "a kind of opposed piston engine" including two rotating cylinders, a first piston and a second piston, two The rotary cylinders are arranged on the top, the first piston and the second piston are respectively arranged in the two rotary cylinders, the direction is opposite, the piston connecting rod protrudes to both sides, and the crankshaft at both ends drives the connecting rod to realize the first piston and the second piston. Reciprocating motion; Chinese patent 201220201255.0 discloses "a five-stroke three-link variable compression ratio opposed engine", which adopts a single cylinder, three-link, and crankshaft mechanism, and the crankshaft completes compression, exhaust, scavenging, and suction every one revolution. Gas and compression five strokes; Chinese patent 02828207.8 discloses an "internal combustion engine using opposed pistons", including a cylindrical outer shell, a cylindrical cylinder arranged along the circumference, two pistons are arranged in the cylinder, and a power cam is connected to output power. The power cam has a double-layer structure, and the improved internal combustion engine is a two-stroke structure; the disadvantage of this "internal combustion engine using opposed pistons" is that since the internal combustion engine is a two-stroke structure, the range of motion of each piston assembly is fixed, and the piston will not cross the top dead center , Exhaust at the end of the work, the gas in the compression chamber is taken in through the intake port, and the exhaust gas in the compression chamber is swept out of the cylinder, the new air and exhaust gas will be mixed, there will be exhaust residue, and the fuel efficiency is low, which is a common problem of two-stroke engines; Moreover, the connection structure of the four-bar linkage device, piston rod, and piston used in the power cam and support assembly is complex and difficult to implement; the air bearing principle adopted by the piston reduces friction, and the installation structure of the dynamic bearing and reset bearing at the end of the piston is a cantilever structure. In particular, the dynamic bearing needs to withstand the strong force of the fuel explosion in the cylinder, which is not conducive to achieving beneficial effects; each cylinder is divided into three chambers by the intake piston, exhaust piston, and sealing end caps at both ends, and the three intake passages One exhaust channel, complex sealing structure, poor reliability

[0004] Although the above improvements have a certain effect in increasing the engine power, due to the unreasonable structure, the structure is complicated and it is difficult to achieve the desired effect of effectively increasing the power.

At present, there is no cylinder that is cylindrical and arranged along the circumference. The opposing pistons are directly driven by cylindrical cams, and the pistons themselves control the opening and closing of the inlet and outlet ports at the same time, and include return stroke, suction, compression, work, Exhaust reports of five-stroke engines

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