CN116378821A - Cylinder-combustion internal combustion engine and working method thereof - Google Patents

Abstract

The invention relates to a cylinder-divided combustion type internal combustion engine and its working method. The internal combustion engine consists of a mixing cylinder and a working cylinder to form a pair of working units. A pressure chamber and an ignition system are arranged at the middle position of the top between the two cylinders. The pressure chamber , the front end communicates with the mixing cylinder through the exhaust valve of the mixing cylinder, and the rear end of the pressure chamber communicates with the working cylinder through the intake valve of the working cylinder; fresh air and fuel form a uniform mixed gas under the upward push of the mixing cylinder piston, and then the uniform After the mixed gas is pushed into the pressure chamber to stabilize the pressure, it is ignited and supplied to the working cylinder to complete the intake and compression; the combustion gas enters the working cylinder to push the piston of the working cylinder to go down to do work, and completes the work and exhaust stroke; the present invention solves the problem of prior art In the four-stroke compression ignition internal combustion engine, the air and fuel are mixed while burning during the combustion process, so that the average combustion cannot be achieved, and the technical problem of high pressure on the fuel injection system.

Description

Cylinder-combustion internal combustion engine and working method thereof

technical field

The invention relates to a cylinder-divided combustion type internal combustion engine and a working method thereof, belonging to the technical field of internal combustion engines.

Background technique

In a traditional four-stroke compression-ignition internal combustion engine such as a diesel engine, the air is sucked into the cylinder during the intake stroke, and then the piston moves upward in the compression stroke and is compressed by the piston to form a certain pressure. After compression, high-pressure fuel is formed, sprayed into the cylinder in the form of atomization, and mixed with compressed high-temperature air. When the temperature reaches the ignition point, the combustion mixture will ignite by itself. The combustion process is mixed while burning. Due to the influence of factors such as the shape of the combustion chamber, air passage parameters, cylinder liner and piston top structure, fuel injection pressure, and fuel injection timing, the air and fuel cannot be mixed evenly during the combustion process, and insufficient combustion leads to high fuel consumption. , emission of pollutants and low combustion efficiency.

In the prior art, for example, the invention with the application number 201710368992.7 discloses a single-valve four-stroke internal combustion engine, the structure of which includes a cylinder, a cylinder head, a piston, a valve and a fuel injector; The gas circulation channel; the gas circulation channel is composed of an intake channel, an exhaust channel and a cooling air channel that are connected to each other; an intake valve is provided in the intake channel, an exhaust valve is provided in the exhaust channel, and a cooling valve is provided in the cooling air channel ; A reciprocating piston is installed in the cylinder; the valve is installed in the cylinder head and is coaxial with the piston; the valve is provided with a number of first through holes; When the interior of the cylinder and the gas circulation channel are mentioned above, a plurality of fuel injectors are sealed and matched with a plurality of first through holes, and correspond to each other. However, the single-valve structure adopted by the internal combustion engine disclosed in the above application cannot ensure sufficient discharge of exhaust gas during intake and exhaust, resulting in the inability to fundamentally solve the problems of uneven gas mixing, high pollutant discharge, and low combustion efficiency; The gas circulation channel is set on the top, which reduces the strength and rigidity of the cylinder head, and requires the installation of several fuel injectors, resulting in slow power response when the engine is running at high speed, the structure is more complicated, and the cost is higher.

Therefore urgently need a kind of novel internal combustion engine of design, can solve the problems referred to above.

Contents of the invention

The invention provides a cylinder-separated combustion type internal combustion engine and its working method, which solves the problem that the four-stroke compression ignition type internal combustion engine in the prior art ensures that the fuel injection system has a relatively high pressure, and that air and fuel are mixed while burning during the combustion process. A problem that caused the mean burn to not be achieved.

The technical solution adopted by the present invention to solve its technical problems is:

A split-cylinder combustion type internal combustion engine is characterized in that it includes a mixing cylinder, a pressure chamber and a working cylinder, the pressure chamber is arranged at the middle position of the top of the mixing cylinder and the working cylinder, and an ignition system is also installed at the middle position of the top of the mixing cylinder and the working cylinder ;

The mixing cylinder exhaust valve and the mixing cylinder intake valve are set on the top of the mixing cylinder, the working cylinder intake valve and the working cylinder exhaust valve are set on the top of the working cylinder, and the pressure chamber is connected with the mixing cylinder exhaust valve and the working cylinder intake valve at the same time. Connected, when the exhaust valve of the mixing cylinder and the intake valve of the power cylinder are closed, a closed space is formed in the pressure chamber;

The intake side of the internal combustion engine is provided with an intake duct, and an injector is installed on the pipe wall of the intake duct;

The mixing cylinder piston is arranged in the mixing cylinder, and the mixing cylinder piston is connected with the crankshaft through the mixing cylinder connecting rod, and the working cylinder piston is arranged in the working cylinder, and the working cylinder piston is connected with the crankshaft through the working cylinder connecting rod;

As a further preference of the present invention, the split-cylinder combustion internal combustion engine is an engine; the aforementioned engine selects an even-numbered cylinder engine or a V-type even-numbered cylinder engine;

As a further preference of the present invention, a cylinder head is set outside the pressure chamber, a camshaft is installed on the cylinder head, a cam position sensor is installed on the camshaft, an EGR valve and an exhaust gas temperature sensor are also included, and the EGR valve, the cam position sensor and the exhaust gas The temperature sensors are all installed in the EGR pipeline;

As a further preference of the present invention, the EGR valve, fuel injector and ignition system are all controlled by ECU;

According to the operating conditions of the engine, the ECU controls the opening of the EGR valve, and reintroduces the incompletely burned exhaust gas into the pressure chamber for combustion, forming an exhaust gas recirculation system;

As a further preference of the present invention, the fuel injector is connected with the oil pump through the oil pipe;

As a further preference of the present invention, the chamber formed by the top of the mixing cylinder piston, the diesel engine cylinder liner and the bottom of the cylinder head is the aforementioned mixing cylinder;

The cavity formed by the top of the piston of the working cylinder, the cylinder liner of the diesel engine and the bottom of the cylinder head is the working cylinder;

Adopt the working method of described sub-cylinder combustion internal combustion engine, specifically comprise the following steps:

Step S1: The internal combustion engine starts and the crankshaft rotates. At this time, the intake valve of the mixing cylinder opens and the exhaust valve of the mixing cylinder closes. The piston of the mixing cylinder moves downward through the connecting rod of the mixing cylinder, sucking fresh air into the intake port. The signal from the cam position signal generator controls the opening of the fuel injector and injects fuel into the intake port. The fuel and fresh air form an initial gas mixture; When reaching the bottom dead center, the intake stroke is completed;

Step S2: The crankshaft continues to rotate, and the piston of the mixing cylinder starts to move upward under the push of the connecting rod of the mixing cylinder. At this time, the intake valve of the mixing cylinder is closed, and the initial gas mixture forms a squeeze or tumble flow under the push of the top of the piston of the mixing cylinder. Disturbance, as the mixing cylinder piston continues to move upward, the gap between the top of the mixing cylinder piston and the bottom of the cylinder head becomes smaller and smaller, the initial gas mixture pressure increases, and the fuel and air form a high-pressure uniform mixture; when the mixing cylinder piston moves upward When it is close to the top dead center, the compression stroke is completed;

Step S3: When the piston of the mixing cylinder moves up to near the top dead center, the exhaust valve of the mixing cylinder opens, the intake valve of the working cylinder closes, and the high-pressure uniform mixture enters the pressure chamber under the push of the piston of the mixing cylinder, and the piston of the mixing cylinder When running to the top dead center, the exhaust valve of the mixing cylinder is closed, and the ignition system ignites the high-pressure uniform mixture under the control of the ECU to form deflagration combustion gas; at the same time, the intake valve of the working cylinder opens, and the deflagration combustion gas passes through the power The cylinder intake valve enters the power cylinder, pushes the piston of the power cylinder to run downward, and drives the crankshaft to rotate through the connecting rod of the power cylinder to perform work externally. When the piston of the power cylinder moves downward to the bottom dead center, the power stroke is completed;

Step S4: The crankshaft continues to rotate under the action of inertia, and the piston of the power cylinder is pushed upward by the connecting rod of the power cylinder. At this time, the intake valve of the power cylinder is closed, and the exhaust valve of the power cylinder is opened. When pushed, it is discharged through the exhaust valve of the power cylinder, and when the piston of the power cylinder moves up to the top dead center, the exhaust stroke is completed;

As a further preference of the present invention,

The EGR exhaust gas temperature sensor monitors the exhaust gas temperature in the pressure chamber. When the exhaust gas temperature is lower than the preset temperature, the EGR valve is opened or closed according to the preset flow section under the control of the ECU to introduce high-temperature gas into the pressure chamber. The gas is heated to improve the cold start performance of the internal combustion engine;

Under partial load conditions, when the temperature of the exhaust gas is higher than the preset temperature, according to the pressure and flow of the exhaust gas, it is opened or closed according to the preset flow section, and part of the incompletely combusted gas is reintroduced into the pressure chamber for combustion to form exhaust gas Recirculation system to reduce emissions from internal combustion engines;

As a further preference of the present invention, the fuel in the oil pump is under the control of the ECU, and the pressure at which the fuel injector injects into the intake passage (5) is 80-100 MPa.

Through the above technical solutions, compared with the prior art, the present invention has the following beneficial effects:

1. For the split-cylinder combustion internal combustion engine provided by the present invention, the pressure of the initial gas mixture formed by mixing air and fuel is 80-100MPa, compared with the injection pressure of 120-2500MPa of the traditional four-stroke compression ignition internal combustion engine, the injection pressure of the present application The injection pressure of the system can greatly reduce the technical requirements of the fuel injection system, reducing the cost by 50%;

2. The fuel injection system and combustion system of the cylinder-combustion internal combustion engine provided by the present invention are simple in structure, and have low requirements on the exhaust aftertreatment device and the oil supply system, which greatly reduces the manufacturing cost;

3. In the split-cylinder combustion type internal combustion engine provided by the present invention, through the parallel bar design of the mixing cylinder and the working cylinder, the initial gas mixture is pushed and squeezed by the mixing cylinder piston of the mixing cylinder to form a uniform gas mixture, which is different from the traditional four Compared with the stroke compression ignition internal combustion engine, the gas mixture is evenly mixed and the combustion efficiency is high;

4. In the split-cylinder combustion internal combustion engine provided by the present invention, intake air and compression are completed in the mixing cylinder, and combustion work and exhaust are completed in the work cylinder. The design of the two-cylinder structure ensures that the temperature and wall temperature are basically balanced, and the heat exchange loss is small. .

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic diagram of the overall structure of a preferred embodiment of the present invention.

In the figure: 1 is the crankshaft, 2 is the piston of the mixing cylinder, 3 is the mixing cylinder, 4 is the intake valve of the mixing cylinder, 5 is the intake port, 6 is the fuel injector, 7 is the oil pump, 8 is the exhaust valve of the mixing cylinder, 9 is the pressure chamber, 10 is the ignition system, 11 is the ECU, 12 is the cam position sensor, 13 is the EGR valve, 14 is the EGR system, 15 is the intake valve of the working cylinder, 16 is the exhaust valve of the working cylinder, and 17 is the working cylinder , 18 is the working cylinder piston, 19 is the mixing cylinder connecting rod, 20 is the working cylinder connecting rod, and 21 is the exhaust gas temperature sensor.

Implementation

The present invention is described in further detail now in conjunction with accompanying drawing. In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "left side", "right side", "upper", "lower" are based on the orientations or positional relationships shown in the drawings, and are only For the purpose of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, "first", "second" and the like do not represent components importance, and therefore should not be construed as limiting the invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present invention.

As explained in the background technology, the current structure of the four-stroke compression ignition internal combustion engine is to complete the intake, compression, work and exhaust strokes in one cylinder. The biggest disadvantage of this structure is that it cannot ensure the uniformity of the gas mixture. Mixing, in order to solve the above-mentioned biggest difficulty, the application provides a cylinder-divided combustion type internal combustion engine, shown in Figure 1 is the overall structural schematic diagram of the preferred embodiment, including a pair of working units composed of a mixing cylinder and a working cylinder, Described from the perspective of Figure 1, the pressure chamber 9 is set in the middle of the top of the mixing cylinder and the working cylinder, and an ignition system 10 is installed at the top and middle of the mixing cylinder 3 and the working cylinder 17. The front end of the pressure chamber passes through the exhaust valve 8 of the mixing cylinder. It communicates with the mixing cylinder, and the rear end of the pressure chamber communicates with the working cylinder through the intake valve 15 of the working cylinder; fresh air and fuel form a uniform mixed gas under the upward push of the mixing cylinder piston 2, and then push the mixed gas into the pressure chamber to stabilize After the pressure, it is ignited and supplied to the working cylinder to complete the intake and compression strokes; the combustion gas enters the working cylinder to push the piston 18 of the working cylinder to go down to do work, and completes the work and exhaust stroke.

In this application, the split-cylinder combustion type internal combustion engine is an engine; usually the engine is an even-numbered cylinder engine or a V-type even-numbered cylinder engine.

One side of the pressure chamber is provided with an air inlet 5, and the fuel injector 6 is installed on the pipe wall of the air inlet; the air inlet is arranged separately to avoid the reduction of the strength and rigidity of the cylinder head caused by being installed on the cylinder head, and the fuel injector is also Installed directly on the intake port, the single design avoids complex structure and slow power response when the engine is running at high speed. It also includes an EGR valve 13, a cam position sensor 12 and an exhaust gas temperature sensor 21. A cylinder head is set outside the pressure chamber, a camshaft is installed on the cylinder head, a cam position sensor is installed on the camshaft, an EGR valve, a cam position sensor and an exhaust gas temperature sensor All are installed in the EGR pipeline; the aforementioned EGR valve, fuel injector and ignition system are all controlled by ECU11; the fuel injector is connected to the fuel pump 7 through the fuel pipe, and the fuel pump presses the fuel into the fuel injector through the fuel pipe, and is controlled by the ECU It is sprayed into the intake port at a preset time at a preset pressure. In this application, the fresh air is charged into the intake port through the ECU, the fuel injector and the intake port. The pressure is injected into the intake port with a preset amount at a preset time to form an initial gas mixture. Obviously, the injection pressure of a traditional four-stroke compression ignition internal combustion engine is 120-2500MPa. The injection pressure realized by this application can meet the uniform Under the premise of mixing, the injection pressure is greatly reduced. When the injection pressure is reduced, the technical requirements of the fuel injection system can be reduced to reduce costs. After testing, it is found that the cost can be reduced by about 50%.

Under the control of the ECU, the incompletely burned gas is reintroduced into the pressure chamber to form an exhaust gas recirculation system (EGR system 14). The EGR system formed here can ensure sufficient combustion and further improve combustion efficiency.

Because the initial fuel gas mixture needs to be mixed, a mixing cylinder piston is arranged in the mixing cylinder, and the mixing cylinder piston is connected with the crankshaft 1 through the mixing cylinder connecting rod 19, and the working cylinder piston is set in the working cylinder, and the working cylinder piston is connected to the crankshaft 1 through the working cylinder connecting rod 20. Crankshaft connection. The mixing cylinder communicates with the crankshaft. By rotating the crankshaft, the operating positions of the mixing cylinder piston and the working cylinder piston can be controlled, so as to realize the demand of gas mixture gas mixing or gas mixture gas acting. It can be clearly seen from the figure that the cylinder head is set outside the pressure chamber (the valve is directly opened on the cylinder head), the top of the mixing cylinder piston, the cylinder liner of the diesel engine (that is, the sawtooth part structure in the figure) and the bottom of the cylinder head The formed chamber is the aforementioned mixing cylinder; the chamber formed by the top of the working cylinder piston, the diesel cylinder liner and the bottom of the cylinder head is the working cylinder.

The present application also provides a working method using the above-mentioned split-cylinder combustion type internal combustion engine to elaborate on the advantages of the double-cylinder design, which specifically includes the following steps:

Step S1: The internal combustion engine starts and the crankshaft rotates. At this time, the intake valve 4 of the mixing cylinder opens and the exhaust valve of the mixing cylinder closes. The piston of the mixing cylinder moves downward through the connecting rod of the mixing cylinder to suck fresh air into the intake port. The shaft cam position signal generator signal controls the opening of the fuel injector, injects fuel into the intake port, and the fuel and fresh air form an initial gas mixture; the piston of the mixing cylinder continues to move downward, sucking the initial gas mixture into the mixing cylinder, when the piston When descending to the bottom dead center, the intake stroke is completed;

Step S2: The crankshaft continues to rotate, and the piston of the mixing cylinder starts to move upward under the push of the connecting rod of the mixing cylinder. At this time, the intake valve of the mixing cylinder is closed, and the initial gas mixture forms a squeeze or tumble flow under the push of the top of the piston of the mixing cylinder. Disturbance, as the mixing cylinder piston continues to move upward, the gap between the top of the mixing cylinder piston and the bottom of the cylinder head becomes smaller and smaller, the initial gas mixture pressure increases, and the fuel and air form a high-pressure uniform mixture; when the mixing cylinder piston moves upward When it is close to the top dead center, the compression stroke is completed;

Step S3: When the piston of the mixing cylinder moves up to near the top dead center, the exhaust valve of the mixing cylinder opens, the intake valve of the working cylinder closes, and the high-pressure uniform mixture enters the pressure chamber under the push of the piston of the mixing cylinder, and the piston of the mixing cylinder When running to the top dead center, the exhaust valve of the mixing cylinder is closed, and the ignition system ignites the high-pressure uniform mixture under the control of the ECU to form deflagration combustion gas; at the same time, the intake valve of the working cylinder opens, and the deflagration combustion gas passes through the power The cylinder intake valve enters the power cylinder, pushes the piston of the power cylinder to run downward, and drives the crankshaft to rotate through the connecting rod of the power cylinder to perform work externally. When the piston of the power cylinder moves downward to the bottom dead center, the power stroke is completed;

Step S4: The crankshaft continues to rotate under the action of inertia, and the piston of the working cylinder is pushed upward by the connecting rod of the working cylinder. At this time, the intake valve of the working cylinder is closed, and the exhaust valve 16 of the working cylinder is opened. Under the push of the power cylinder, it is discharged through the exhaust valve of the power cylinder. When the piston of the power cylinder moves up to the top dead center, the exhaust stroke is completed.

The exhaust gas temperature sensor of EGR is also provided in this application, which monitors the exhaust gas temperature in the pressure chamber. When the exhaust gas temperature is lower than the preset temperature, the EGR valve is opened or closed according to the preset flow section under the control of the ECU to turn the high temperature The gas is introduced into the pressure chamber to heat the unburned gas to improve the cold start performance of the internal combustion engine; under partial load conditions, when the temperature of the exhaust gas is higher than the preset temperature, according to the pressure and flow of the exhaust gas, according to the preset flow section On or off, part of the incompletely burned gas is reintroduced into the pressure chamber for combustion to form an exhaust gas recirculation system and reduce the emission of pollutants from the internal combustion engine.

From the above description, it can be seen that the split-cylinder combustion internal combustion engine provided by the present application fundamentally solves the problems of uneven gas mixing, high pollutant emission and low combustion efficiency, and is suitable for wide-scale promotion.

Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and unless defined as herein, are not to be interpreted in an idealized or overly formal sense explain.

The meaning of "and/or" in this application means that each exists alone or both exist simultaneously.

The meaning of "connection" in this application may be a direct connection between components or an indirect connection between components through other components.

Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (9)

1. A split-cylinder combustion internal combustion engine, characterized in that: the device comprises a mixing cylinder (3), a pressure chamber (9) and a working cylinder (17), wherein the pressure chamber (9) is arranged at the middle positions of the tops of the mixing cylinder (3) and the working cylinder (17), and an ignition system (10) is further arranged at the middle positions of the tops of the mixing cylinder (3) and the working cylinder (17);

a mixing cylinder exhaust valve (8) and a mixing cylinder intake valve (4) are arranged at the top of the mixing cylinder, a working cylinder intake valve (15) and a working cylinder exhaust valve (16) are arranged at the top of the working cylinder, the pressure chamber is simultaneously communicated with the mixing cylinder exhaust valve (8) and the working cylinder intake valve (15), and when the mixing cylinder exhaust valve (8) and the working cylinder intake valve (15) are closed, a closed space is formed in the pressure chamber (9);

an air inlet channel (5) is arranged on the air inlet side of the internal combustion engine, and an oil injector (6) is arranged on the pipe wall of the air inlet channel (5);

a mixing cylinder piston (2) is arranged in the mixing cylinder (3), the mixing cylinder piston (2) is connected with the crankshaft (1) through a mixing cylinder connecting rod (19), a working cylinder piston (18) is arranged in the working cylinder (16), and the working cylinder piston (18) is connected with the crankshaft (1) through a working cylinder connecting rod (20).

2. The split-cylinder combustion internal combustion engine according to claim 1, wherein: the cylinder-separated combustion type internal combustion engine is an engine; the engine is an even-number type cylinder engine or a V-type even-number type cylinder engine.

3. The split-cylinder combustion internal combustion engine according to claim 2, characterized in that: a cylinder cover is covered outside the pressure chamber (9), a cam shaft is arranged on the cylinder cover, a cam position sensor (12) is arranged on the cam shaft, the engine further comprises an EGR valve (13) and an exhaust gas temperature sensor (21), and the EGR valve (13), the cam position sensor (12) and the exhaust gas temperature sensor (21) are all arranged in an EGR pipeline (14).

4. A split-cylinder combustion internal combustion engine as set forth in claim 3, wherein: the EGR valve (13), the fuel injector (6) and the ignition system (10) are controlled by the ECU (11);

according to the engine operation condition, the ECU (11) controls the opening degree of the EGR valve (13) to reintroduce the incompletely combusted exhaust gas into the pressure chamber (9) for combustion, so as to form an exhaust gas recirculation system.

5. The split-cylinder combustion type internal combustion engine according to claim 4, wherein: the oil injector (6) is connected with the oil pump (7) through an oil pipe.

6. The split-cylinder combustion internal combustion engine according to claim 5, characterized in that: the cavity formed by the top of the mixing cylinder piston (2), the diesel engine cylinder sleeve and the bottom of the cylinder cover is the mixing cylinder (3);

the chambers formed by the top of the working cylinder piston (18), the diesel cylinder liner and the bottom of the cylinder head are the working cylinders (16).

7. A method of operating a split-cylinder combustion internal combustion engine as set forth in claim 6, characterized in that: the method specifically comprises the following steps:

step S1: the internal combustion engine is started, the crankshaft (1) rotates, at the moment, the air inlet valve (4) of the mixing cylinder is opened, the air outlet valve (8) of the mixing cylinder is closed, the piston (2) of the mixing cylinder drives downward through the connecting rod (19) of the mixing cylinder to suck fresh air into the air inlet channel (5), the ECU (11) controls the opening of the fuel injector according to the signal of the cam position signal generator of the camshaft, fuel oil is injected into the air inlet channel (5), and the fuel oil and the fresh air form initial fuel gas mixture; the mixing cylinder piston (2) continues to descend, the initial gas mixture is sucked into the mixing cylinder (3), and when the piston (2) descends to the bottom dead center, the air inlet stroke is completed;

step S2: the crankshaft continues to rotate, the mixing cylinder piston (2) starts to move upwards under the pushing of the mixing cylinder connecting rod (19), at the moment, the mixing cylinder inlet valve (4) is closed, the initial gas mixture forms turbulence of squeeze flow or tumble flow under the pushing of the top of the mixing cylinder piston (2), the gap between the top of the mixing cylinder piston (2) and the bottom of the cylinder cover is smaller and smaller along with the continuous ascending of the mixing cylinder piston (2), the initial gas mixture pressure is increased, and the fuel and the air form high-pressure uniform mixture; when the mixing cylinder piston moves upwards to be close to the vicinity of the top dead center, the compression stroke is completed;

step S3: when the mixing cylinder piston moves upwards to the vicinity of the top dead center, an exhaust valve (8) of the mixing cylinder is opened, an intake valve (15) of the working cylinder is closed, high-pressure uniform mixed gas enters a pressure chamber (9) under the pushing of the mixing cylinder piston (2), and when the mixing cylinder piston moves to the top dead center, the exhaust valve (8) of the mixing cylinder is closed, and an ignition system ignites the high-pressure uniform mixed gas under the control of an ECU (11) to form deflagrated combustion gas; meanwhile, an air inlet valve (15) of the acting cylinder is opened, deflagrated combustion gas enters the acting cylinder (16) through the air inlet valve (15) of the acting cylinder, a piston (18) of the acting cylinder is pushed to move downwards, a crankshaft (1) is pushed to rotate through a connecting rod (20) of the acting cylinder to apply work outwards, and when the piston (18) of the acting cylinder moves downwards to a bottom dead center, the acting stroke is completed;

step S4: the crankshaft continues to rotate under the action of inertia, the working cylinder piston (18) is pushed to move upwards through the working cylinder connecting rod (20), at the moment, the working cylinder inlet valve (15) is closed, the working cylinder outlet valve (16) is opened, the waste gas after working is pushed by the working cylinder piston (18) to be discharged through the working cylinder outlet valve (16), and when the working cylinder piston (18) moves upwards to the upper dead point, the exhaust stroke is completed.

8. The method of operating a split-cylinder combustion internal combustion engine of claim 7, wherein:

the EGR exhaust gas temperature sensor (21) monitors the temperature of the exhaust gas in the pressure chamber, when the temperature of the exhaust gas is lower than a preset temperature, the EGR valve (13) is controlled by the ECU (11) to open or close according to a preset flow section so as to introduce high-temperature fuel gas into the pressure chamber, heat unburned fuel gas and improve the cold starting performance of the internal combustion engine;

under the partial load working condition, when the temperature of the exhaust gas is higher than the preset temperature, the exhaust gas is opened or closed according to the preset flow section according to the pressure and the flow of the exhaust gas, and partial incompletely combusted fuel gas is reintroduced into the pressure chamber (9) for combustion, so that an exhaust gas recirculation system is formed, and the emission pollutants of the internal combustion engine are reduced.

9. The method of operating a split-cylinder combustion internal combustion engine of claim 8, wherein: under the control of the ECU (11), the fuel in the oil pump (7) is sprayed into the air inlet channel (5) by the oil sprayer (6) at the pressure of 80-100MPa.

Images