KR101075469B1 - Compound cycle engine - Google Patents

Abstract

The present invention relates to a compound cycle engine.

Conventional two-cycle piston engines have a high loss of scavenged air and are difficult to increase the average effective pressure and efficiency. There are many drawbacks of fuel consumption due to incomplete combustion because exhaust gas tends to be incomplete, residual gas remains, and expansive combustion gas rapidly exits the exhaust hole in a short time.

The present invention combines the functional features of the two-cycle piston engine and the rotary engine to solve this drawback, the defect of the two-cycle piston engine is complemented by the characteristics of the rotary engine and the defect of the rotary engine is the characteristic of the two-cycle piston engine In addition to the above, in the combustion chamber of the rotary engine which supercharged the amount of scavenging and installed a rich mixed gas of air and fuel in the two-cycle piston engine and its side wall, 6: It is designed to provide high fuel efficiency and low pollution engines by increasing the thermal efficiency by 50-60% by making lean combustion by dividing it into 4 ratios and completely burning it in the expansion stroke process. The rotor of the rotary engine functions as a flywheel of a two-cycle engine, which is simple in structure, low in production cost, small in weight per horsepower, and easy to handle. In addition, since there is a power stroke every one revolution of the crankshaft, the torque fluctuation is small. Therefore, the number of cylinders is at least smoothly operated and there is little vibration noise.

Description

Compound cycle engine

The present invention takes advantage of the characteristics of the conventional two-cycle engine and the rotary engine, and complements the shortcomings. The present invention supercharges the required amount of gas and enriches the mixed gas of air and fuel. In the combustion chamber of the piston engine and the rotary engine installed on the side wall, it is divided into a ratio of about 6: 4 each and lean burned at the same time, so that the combustion effect is completely burned in a relatively long expansion stroke process, thereby increasing the thermal effect by 50-60%. The present invention relates to a combined cycle engine designed to provide a low-cost, low-fuel engine with high fuel efficiency.

Since the two-cycle piston engine releases exhaust gas and sucks in new air, which is shorter than half of the four-stroke cycle engine, the exhaust becomes incomplete, the effective stroke is short, and the exhaust and small holes are open for a long time. (I) Loss increases and it is difficult to increase the average effective pressure or efficiency. Because of the rapid discharge of waste for scavenging, there are many losses due to incomplete expansion and poor combustion due to insufficient ventilation due to residual gas.

As described above, the problem of solving the shortcomings of the two-cycle engine is to solve the complex characteristics of the two-cycle engine and the rotary engine.

Extend the normal small pore passage installed on the cylinder side wall of the two-cycle piston engine, and add the small pores equipped with automatic valves on the upper side, and the compressed air holes vertically installed on the piston head The rotor is fixed to the crankshaft, and the rotor is fixed to the crankshaft, and an airtight housing is installed around the combustion chamber. The combustion chamber formed at the upper side thereof communicates with the primary exhaust hole, and a fuel pipe is installed at the ceiling above the rotor direction. Secondary air holes are laid on the side wall of the nozzle, and a plurality of buckets are arranged around the rotor to hit the combustion gas ejected from the nozzle, and secondary air holes are installed on the lower side wall of the housing. In the cylinder, a large amount of air is supercharged. In the combustion chamber of the piston engine and the combustion engine of the rotary engine, respectively, the fuel is thinned and burned at the same time. Its exhaust gas is reduced and torque is small and its structure is simple. Therefore, the engine price is low and there is little vibration and noise.

The combined cycle engine of the present invention combines the characteristics of the two-cycle piston engine and the characteristics of the rotary engine to supercharge the required amount, so that the combustion gas of the high temperature and high pressure is sparsely burned once per revolution of the crankshaft in each combustion chamber. Since it promotes complete combustion and recovers the heat energy of the exhaust in the process of expanding for a relatively long time, the thermal effect of the entire combined cycle is about 50-60%, so the output is greatly improved and fuel consumption is greatly reduced due to high fuel consumption. In addition, the combustion product exhaust gas is less toxic.

Since a large amount of lubricant is stored under the crankcase of the 2-cycle piston engine and the housing of the rotary engine, the lubricating oil is strongly scattered on the inner wall of the cylinder and the inner wall of the rotor by the rotating crank and the rotor, so the lubricant consumption is low and the piston The compressed air in the vertical direction installed in the filled with fresh air has the effect of preventing the piston overheating. In addition, a plurality of buckets are arranged on the circumferential surface of the rotor so that when the gas is ejected from the nozzle, the combustion gas energy is converted into velocity energy, which hits the bucket to rotate the rotor smoothly, and the flywheel function of the 2-cycle engine is also provided. Will also serve. Torque fluctuation is small because there is a power stroke that explodes once every crank shaft (rotator shaft). Therefore, at least the number of cylinders is smoothly operated and there is little vibration noise, so that the comfort of the passenger car is comfortable. And because the structure is simple, the weight and volume per horsepower, the number of engine parts and the manufacturing cost is greatly reduced.

The present invention will be described in detail with reference to the accompanying drawings.

A small pore (3 ') equipped with an automatic valve (3) is installed above the ordinary small pore (2) installed below the left wall of the cylinder (1) of the 2-cycle piston engine. On the right side of the crankshaft 4 a plurality of concave buckets 5 secure the rotors 6 arranged circumferentially and a housing 7 secured around them. And the combustion chamber 8 formed thereon is in communication with the primary exhaust hole 9, and the fuel pipe 11 branched from the fuel valve 10 is installed on the ceiling above the combustion chamber 8 A nozzle 12 having a venturi portion formed in the direction of the rotor 6 is formed at the bottom thereof, and secondary air holes 13 are laid on the side walls thereof, and secondary air holes 14 are disposed below the housing 7. ), And the compressed air passage 16 in the longitudinal direction is laid in the piston 15 head so as to communicate with the lower side wall hole 16 '.

In the drawings, reference numeral 17 denotes a connecting rod, 18 denotes before ignition, 19 denotes a cock, 20 denotes an air suction hole, 21 denotes a lubrication hole, and 22 denotes a gear.

The operation of the present invention configured as described above is as follows.

When the crankshaft 4 rotates, the piston 15 repeatedly reciprocates up and down via the connecting rod 17 and the rotor 6 smoothly maintains hermeticity in the housing 7. As it rotates, it also serves as a flywheel.

When the piston 15 rises and enters the air compression stroke, the upper automatic valve 3 is closed and the compressed air passage 16 installed in the head of the piston 15 is filled with compressed air. When the piston 15 reaches the top dead center, the lower side wall hole 16 'of the compressed air passage 16 coincides with the primary exhaust hole 9 laid below the side wall of the cylinder 1, A part (about 40%) of the high temperature and high pressure compressed air rapidly flows into the combustion chamber 8 formed above the rotor 6 and fills it. At this moment, when the fuel is injected from the bottom of the fuel pipe 11 branched from the fuel valve 10 and the fuel valve 10 and ignited by the pre-ignition 18, explosive combustion gas of high temperature and high pressure is introduced into the cylinder 1. In the internal combustion chamber 8, the high temperature and high pressure combustion gas is ejected from the nozzle 12 in which the venturi part is formed, and is converted into velocity energy in the combustion chamber 8 on the housing 7 side. It hits a bucket 5 formed on the circumferential surface of the rotor 6 to rotate the rotor 6 and discharge it to the secondary exhaust hole 14.

Thus, when the piston 15 starts and descends the expansion stroke, the lower side wall hole 16 ′ of the side wall is displaced from the primary exhaust hole 9 of the cylinder 1 side wall, so that the combustion chamber 8 of the housing 7 side. The combustion gas inside does not flow back into the compressed air passage 16.

As described above, in the combustion chamber 8 of the cylinder 1 side combustion chamber rotor 6, which is supercharged with a large amount of air, the fuel is burned at the same time at a ratio of about 6: 4, so that lean combustion is possible. . Therefore, the high temperature and high pressure gas which burns on the cylinder 1 side and the housing 7 side promotes complete combustion because the expansion time is relatively long. In another embodiment, the piston 15 is air compressed and can be combusted in the combustion chamber 8 on the rotor 6 side. In another embodiment, the fuel is shut off by a cock 19 of the fuel pipe 11. When fuel is injected only in the combustion chamber on the left side of the cylinder 1 side, the exhaust energy of high temperature (about 900-1000 ° C.) discharged to the primary exhaust hole 9 even if only the piston 15 performs a power stroke is applied. By rotating (6), the overall thermal efficiency of the engine of the present invention is greatly improved by about 50-60%. When the combustion gas passes through the venturi portion formed in the nozzle 12 under the combustion chamber 8, fresh secondary air is automatically sucked from the secondary air hole 13 installed in the side wall thereof, and the Since carbon monoxide (Co) gas, which is a harmful component, is re-burned and energized, there is an effect that the exhaust air is also reduced. When the piston 15 descends in the expansion stroke and the head reaches the bottom dead center, and the primary exhaust hole 9 of the side wall of the cylinder 1 is opened, the normal small hole 2 is also opened and the valve 3 above. ) Is opened, and the small pores 3 'are opened, so that many of the scavenged air flowing from both sides completely exhausts the exhaust, so that no residual gas is left in the cylinder 1, and only new air is filled.

1 is a longitudinal sectional view showing the whole of the present invention;

2 is a cross-sectional view taken along the line A-A of FIG.

3 is a cross-sectional view taken along line B-B.

4 is a longitudinal cross-sectional view showing a desired state of the present invention;

* Description of the symbols for the main parts of the drawings *

1: Cylinder 2: Small pore 3: Automatic valve

3 ': small pores 4: crank shaft

5 bucket 6 rotor 7 housing

8 combustion chamber 9 primary exhaust hole 10 fuel side

11: fuel pipe 12: nozzle 13: secondary air ball

14: secondary exhaust hole 15: piston 16: compressed air passage

17: connecting rod (counecting rod) 18: before ignition

19: cock 20: air suction hole 21: lubrication distribution hole

22: gear

Claims (1)

The small air hole 3 'with the automatic valve 3 installed thereon is extended by extending the normal small air hole 2 installed under the left wall of the cylinder 1 of the 2-cycle piston engine. On the right side of the enlarged and conventional crankshaft 4, a plurality of concave buckets 5 fix a rotor 6 arranged in a circumference and a hermetic housing around it. (7) is provided, but the combustion chamber (8) formed above is communicated with the primary exhaust hole (9), and the fuel pipe (11) branched from the fuel valve (10) is installed on the ceiling, and the combustion chamber ( 8) a nozzle 12 having a venturi portion formed in the direction of the rotor 6 is formed below, and a secondary air hole 13 is laid on the side wall thereof and a secondary exhaust hole under the housing 7. (14) is laid, and the piston (15) head (head) in the longitudinal direction of the compressed air passage (16) to the lower side wall hole (16 ') to communicate so that the combined cycle engine.

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