CN212716887U - Four-stroke or two-stroke internal combustion engine using liquid carbon dioxide - Google Patents

Abstract

The utility model discloses an use liquid carbon dioxide's four-stroke or two-stroke internal-combustion engine, the utility model discloses a three sets of thermal cycle devices turn into mechanical energy with internal-combustion engine exhaust gas heat, cooling waste heat, human heat dissipation and the partly of weather heat, have greatly improved the thermal efficiency of internal-combustion engine. The utility model discloses compare with water spray type six-stroke internal-combustion engine and do not have the problem that water and oil combine to block up the pipeline, the cold energy of liquid carbon dioxide release is used for refrigerating, the air condition compressor of traditional car and boat has been saved, the power of traveling of car and boat has been optimized, fanless heat dissipation has saved the air intake grid of car, the locomotive overall arrangement has been reduced, windage and noise are reduced, carbon dioxide in-cylinder cooling and heat transfer energy-absorbing, the high temperature release of engine compartment and tail gas has been eliminated, be favorable to infrared the monitoring of evading and trail.

Description

Four-stroke or two-stroke internal combustion engine using liquid carbon dioxide

Technical Field

The present invention relates to the use of liquid carbon dioxide in a four-stroke or two-stroke internal combustion engine.

Background

The existing four-stroke or two-stroke internal combustion engine has low thermal efficiency, almost half of the energy is dissipated by cooling outside the cylinder and discharging exhaust gas, and in order to improve the thermal efficiency, the chinese patent application No. 00113997.5 provides a six-stroke internal combustion engine spraying water in the cylinder, although the thermal efficiency can be greatly improved, the defects are also obvious: the defect that the exhaust water and oil pollute and block pipelines is difficult to solve, and the popularization of the internal combustion engine is limited. Compared with the existing mainstream four-stroke or two-stroke internal combustion engine, the six-stroke internal combustion engine also has the problems of friction energy consumption and mechanical wear in two strokes, and in addition, when the six-stroke internal combustion engine is applied to an air conditioner on a vehicle or a ship, the six-stroke internal combustion engine not only consumes the precious power of the internal combustion engine when a compressor works, but also is easy to be tracked and detected by infrared rays due to the heat release of refrigerant compression and the waste heat discharged by the internal combustion engine when the internal combustion engine works.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an use liquid carbon dioxide's four-stroke or two-stroke internal-combustion engine, synchronous injection carbon dioxide when doing work in the jar is favorable to restraining nitrogen oxide and generates to it is not high to solve current four-stroke or two-stroke internal-combustion engine heat efficiency, and the air conditioner additionally consumes power and outer row of used heat is listened and the problem of tracking by infrared easily.

The utility model provides a technical scheme that its technical problem adopted is: the four-stroke or two-stroke internal combustion engine using liquid carbon dioxide comprises a liquid carbon dioxide storage tank, a liquid conveying pipe, a pressurization gas tank, a cylinder, an exhaust pipe, a gas storage tank cabin, a passenger cabin and an internal combustion engine cabin, and is characterized in that one end of the liquid conveying pipe is connected with the liquid carbon dioxide storage tank, and the other end of the liquid conveying pipe is connected with the pressurization gas tank through a first one-way valve to form a carbon dioxide gas supply pipeline;

the infusion tube is provided with a radiating tube and an infusion pump, and the infusion pump is positioned at the upper part of the radiating tube; a branch exhaust pipe is arranged on a pipeline between the infusion pump and the first one-way valve;

a closed isolation cover is wrapped outside the radiating pipe, an external leakage release pipe which leads to the outside of the passenger cabin is arranged on the closed isolation cover, and a sealing cover is arranged at the port of the external leakage release pipe; a replacement air shell is arranged outside the closed isolation cover, an outer ventilation opening leading to the outside of the passenger compartment, an inner circulation ventilation opening leading to the inside of the passenger compartment and an air supply opening with a fan are arranged on the ventilation shell to form a passenger compartment human body heat dissipation and climate heat circulation system, and the two-way change switch controls the closing of the inner circulation ventilation opening and the outer ventilation opening;

a heat exchange water tank is arranged in the internal combustion engine cabin, a heat dissipation coil is arranged in the heat exchange water tank, one end of the heat dissipation coil is connected with the supercharging gas tank through a second air return pipe, and the other end of the heat dissipation coil is connected with the supercharging gas tank through an air feed pipe and a second air feed pump on an air feed pipeline to form a cooling waste heat circulating system;

meanwhile, the heat exchange water tank is connected with the internal combustion engine cooling channel through a water return pipe, and the other end of the internal combustion engine cooling channel is communicated with a water pump through a water delivery pipe and then is connected with the heat exchange water tank to form an internal combustion engine cooling water circulating system;

a heat exchanger is arranged on the exhaust pipe, one end of the heat exchanger is connected with the booster gas tank through a gas pipe and a first gas transmission pump on the gas pipe, and the other end of the heat exchanger is connected with the carbon dioxide booster gas tank through a first gas return pipe, so that a heat circulation system for exhaust gas of the internal combustion engine is formed;

the upper end of the pressure-increasing gas tank is connected with a three-way control valve through a gas outlet pipe, one outlet of the three-way control valve is connected with a gas injection pipe after being connected with a gas distribution mechanism, the gas injection pipe is communicated with a cylinder of the internal combustion engine and is connected with a gas nozzle, the other outlet of the three-way control valve is connected with a gas return pipe, and the gas return pipe is connected with a liquid carbon dioxide storage tank to form a carbon dioxide gas return pipeline;

the air nozzle arranged in the cylinder and the oil nozzle or the spark plug are ignited to synchronously work.

And the branch exhaust pipe is provided with a first valve and an external release port.

The two ends of the carbon dioxide return pipe are respectively connected with the three-way control valve and the liquid carbon dioxide storage tank, the return valve, the pneumatic quick connector and the second one-way valve are sequentially arranged on the carbon dioxide return pipe, the manual-automatic integrated fire extinguishing valve is arranged on the internal combustion engine cabin section on the carbon dioxide return pipe, and the manual fire extinguishing switch arranged in the passenger cabin can manually control the manual-automatic integrated fire extinguishing valve to be opened.

The utility model has the advantages that:

(1) the utility model discloses a three sets of thermal cycle devices turn into mechanical energy with internal-combustion engine exhaust gas heat, cooling waste heat, human heat dissipation and partly of weather heat, have greatly improved the thermal efficiency of internal-combustion engine.

(2) Use the utility model discloses a car and boat need not extra burden air condition compressor, can be used for going mechanical power with attentive, and the dynamic property of car and boat has just strengthened greatly, can reduce internal-combustion engine discharge capacity, reduce oil consumption, reduction exhaust emission when reaching the same functioning speed with the car and boat that uses traditional internal-combustion engine. The utility model discloses an air conditioner utilizes carbon dioxide to absorb still to utilize the heat exchange circulation of carbon dioxide to absorb internal-combustion engine tail gas waste heat and cylinder heat dissipation when human used heat and the environment used heat in the passenger cabin, thereby becomes high pressure power promotion piston reconversion mechanical energy in pressure boost gas pitcher 20 and greatly improved the fuel utilization efficiency of internal-combustion engine.

(3) The carbon dioxide is easy to volatilize, cannot be adhered to the cylinder wall and cannot corrode the cylinder wall, and cannot be combined with water and oil to block a pipeline, so that the practicability of the water-spraying six-stroke internal combustion engine is greatly enhanced, and the cheap liquid carbon dioxide serving as a refrigerant has the advantages that the internal combustion engine can be refrigerated without being started, so that the engine is silent, oil is saved, the environment is protected, the mechanical abrasion is reduced, and the risk of carbon monoxide poisoning can be avoided.

(4) Because carbon dioxide has absorbed cylinder cooling heat, the utility model discloses an internal-combustion engine need not to set up radiator fan, arranges the position of heat radiation water tank 37 in a flexible way and just can reach fine radiating effect, so use the utility model discloses a car needn't set up the air inlet grille to simplify the design of locomotive, reduce the length and the volume of locomotive, reduce automobile cost and reduce the windage oil consumption.

(5) The very high internal-combustion engine spontaneous combustion that very easily causes of exhaust pipe temperature of traditional internal-combustion engine, the utility model discloses a thereby carbon dioxide circulation heat abstractor heat exchanger 29 has greatly reduced the surface temperature of blast pipe 28 and has reduced the risk of internal-combustion engine cabin spontaneous combustion.

(6) The utility model discloses a manual-automatic fire valve 43 has solved traditional internal combustion engine cabin and has lit a fire easily and put out a fire difficult problem, and carbon dioxide is a high-quality fire extinguishing agent, and the on-vehicle removal is convenient, and carbon dioxide liquid state still contains a large amount of cold energy, and the fire extinguishing effect is better, and branch's blast pipe 16 design makes the use the utility model discloses a function of car and ship fungible part fire engine.

(7) The utility model discloses a popularization can effectively promote liquid carbon dioxide industrial preparation and storage, is favorable to energy saving and emission reduction, and liquid carbon dioxide's deposit and the mode that filling station, filling station combined together are favorable to preventing and in time put out oil gas detonation's calamity.

(8) The utility model discloses internal-combustion engine exhaust temperature can show the reduction, is favorable to the military to conceal, avoid infrared reconnaissance, and ordinary internal-combustion engine is in order to improve fuel efficiency and increase the compression ratio, has caused a large amount of generations of nitrogen oxide, is unfavorable for energy saving and emission reduction, and in order to eliminate nitrogen oxide, the mode that the engineer applyed urea in three way catalyst usually is solved. The utility model discloses owing to carbon dioxide spouts into the participation combustion reaction when the cylinder does work, can produce a certain amount of carbon monoxide because of incomplete combustion, and the nitrogen oxide that carbon monoxide and internal-combustion engine produced decomposes into nitrogen gas and water under three way catalyst's effect, is favorable to clean emission.

(9) The utility model discloses an injection of carbon dioxide in the cylinder belongs to the internal cooling, can avoid traditional internal-combustion engine cylinder in the local high temperature, balanced cylinder temperature and burning during doing work a certain amount of carbon dioxide participate in also being favorable to restraining the detonation phenomenon of gasoline engine during operation, are favorable to improving and compress and let the internal-combustion engine have higher fuel efficiency and economic nature.

(10) The turbo charger of traditional internal-combustion engine need bear extremely high exhaust temperature environment, and high-speed pivoted turbine bearing and turbine blade are fragile under the high temperature, very harsh and maintain inconvenience to lubricated requirement, the utility model discloses a very big reduction of exhaust temperature makes the operational environment who uses turbo charger obtain very big improvement, thereby can reduce turbo charger's the manufacturing degree of difficulty and reduce manufacturing cost, increases its life, and easy to maintain saves the expense.

(11) To needs use compressed gas power's car ship the utility model discloses a high-pressure carbon dioxide in the pressurization gas jar can be for it provides the power supply, need not to use gas compressor, reduces car ship cost fuel reduction when lightening mechanical burden, especially does not rely on the work of internal-combustion engine when car ship emergency braking with turn to, has extremely superior security.

Drawings

In order to illustrate the embodiments or prior art of the present invention more clearly, the drawings used in the description of the embodiments or prior art are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive step.

Fig. 1 is a schematic diagram of the air supply structure of the present invention.

In the figure: 1-liquid carbon dioxide storage tank, 2-safety valve, 3-liquid outlet valve, 4-filling port, 5-infusion tube, 6-radiating tube, 7-infusion pump, 8-sealing isolation cover, 9-external discharge release tube, 10-sealing cover, 11-ventilation shell, 12-internal circulation vent, 13-two-way change-over switch, 14-air supply port with fan, 15-external vent, 16-branch exhaust tube, 17-first valve, 18-external discharge port, 19-first one-way valve, 20-air tank, 21-air outlet tube, 22-three-way control valve, 23-second valve, 24-air distribution mechanism, 25-air injection tube, 26-air nozzle, 27-air cylinder, 28-exhaust tube and 29-heat exchanger, 30-a first air return pipe, 31-a first air conveying pump, 32-an air conveying pipe, 33-an air conveying pipe, 34-a second air conveying pump, 35-a second air return pipe, 36-a heat dissipation coil pipe, 37-a heat exchange water tank, 38-a water return pipe, 39-a circulating water pump, 40-a water conveying pipe, 41-an internal combustion engine cooling channel, 42-a carbon dioxide air return pipe, 43-a manual-automatic integrated fire extinguishing valve, 44-a manual fire extinguishing switch, 45-an air return valve, 46-a second one-way valve, 47-an air storage tank cabin, 48-a passenger cabin, 49-an internal combustion engine cabin and 50-a pneumatic quick connector.

Detailed Description

In order to make the technical solution and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. The described embodiments are only some, not all embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the scope protected by the present invention.

The structure of the four-stroke or two-stroke internal combustion engine using liquid carbon dioxide of the utility model is shown in figure 1, a filling port 4 is arranged on a liquid carbon dioxide storage tank 1, one end of a liquid conveying pipe 5 is connected with the liquid carbon dioxide storage tank 1, and the other end is connected with a booster gas tank 20 through a first check valve 19 to form a liquid carbon dioxide gas supply pipeline; a radiating pipe 6 and an infusion pump 7 are arranged on the infusion pipe 5, and the infusion pump 7 is positioned between the radiating pipe 6 and the first one-way valve 19; a branch exhaust pipe 16 leading to the outside of the passenger compartment 48 is provided on the line between the infusion pump 7 and the first check valve 19, and the branch exhaust pipe 16 is provided with a first valve 17 and an external release port 18.

The transfusion tube 5 is also provided with a safety valve 2 and a liquid outlet valve 3.

A closed isolation cover 8 is wrapped outside the radiating pipe 6, an external leakage release pipe 9 is arranged on the closed isolation cover 8 and communicated to the outside of a passenger compartment 48, and a sealing cover 10 is arranged at the port of the external leakage release pipe 9; a replacement air shell 11 is arranged outside the closed isolation cover 8, an outer ventilation opening 15 leading to the outside of the passenger compartment, an inner circulation ventilation opening 12 leading to the inside of the passenger compartment 48 and an air supply opening 14 with a fan are arranged on the ventilation shell 11, a human body heat dissipation and climate heat circulation system of the passenger compartment is formed, and a two-way change-over switch 13 controls the closing of the inner circulation ventilation opening 12 and the outer ventilation opening 15.

When carbon dioxide flows in the pipeline, the cooling energy is released from the radiating pipe 6, the fan blows air into the passenger compartment 48 for cooling, meanwhile, the carbon dioxide in the radiating pipe 6 absorbs the room temperature and the heat emitted by the human body and flows to the pressurizing air tank 20, the two-way change-over switch 13 closes the outer air vent 15 to perform inner circulation of the cooling air, and closes the inner air vent 12 to perform outer circulation of the cooling air.

When the passenger compartment 48 needs to use cold air alone, the pipeline infusion pump 7 can be started to directly return carbon dioxide from the carbon dioxide to the liquid tank 1 and pump the carbon dioxide into the booster gas tank 20, a ventilation circulation system of the passenger compartment 48 is started, and the first valve 17 on the branch exhaust pipe 16 is closed, so that cooling can be conveniently carried out without wasting the carbon dioxide. Because carbon dioxide is a stifling gas, once leak and will endanger passenger's safety in passenger cabin 48, the utility model discloses set up a sealed cage 8 for cooling tube 6, set up one on the sealed cage 8 and leak release pipe 9 and lead to outside passenger cabin 48, the mouth of pipe has sealed lid 10, and sealed lid 10 prevents that cold gas from scattering and overflowing when normal use, and the pressure that produces when the pipeline damage of cooling tube 6 has carbon dioxide to leak dashes sealed lid 10 and arranges outside the car in order to guarantee passenger's safety.

When the internal combustion engine is not in operation and also uses cold air, the first valve 17 on the branch exhaust pipe 16 leading to the outside of the passenger compartment 48 is opened, the external release port 18 releases part of carbon dioxide, the carbon dioxide in the radiating pipe 6 is caused to flow upwards, the flowing evaporation generates cold air to supply to the passenger compartment 48, and the external release port 18 on the branch exhaust pipe 16 can also be used for flow fire extinguishing or other purposes.

Exhaust gas is typically used to power the turbocharger, which utilizes only a small portion of the exhaust gas heat energy, and most of the exhaust gas heat energy is wasted as exhaust gas exits the exhaust pipe 28.

The utility model discloses install heat exchanger 29 on blast pipe 28, heat exchanger 29 one end is connected with pressure boost gas pitcher 20 through gas-supply pipe 32 and the first gas transmission pump 31 on the gas-supply pipe, and the other end of heat exchanger 29 is connected with carbon dioxide pressure boost gas pitcher 20 through first muffler 30, forms internal-combustion engine exhaust gas heat cycle system; the first gas transmission pump 31 transmits the cold carbon dioxide in the pressurized gas tank 20 to the heat exchanger 29, heats the carbon dioxide by using the exhaust gas, and then transmits the heated carbon dioxide back to the pressurized gas tank 20 to store energy for pressurization.

The cooling heat of the engine cylinders 27 is wasted as much heat energy is dissipated by the radiator tank and the fan, in addition to heating the passenger compartment 48 in winter. The utility model is provided with a heat exchange water tank 37, the heat exchange water tank 37 is connected with a cooling channel 41 of the internal combustion engine through a water return pipe 38, and the other end of the cooling channel 41 of the internal combustion engine is connected with a circulating water pump 39 through a water delivery pipe 40 and then is connected with the heat exchange water tank 37 to form a cooling water circulating system of the internal combustion engine; the circulating water pump 39 pumps the antifreeze solution heated in the engine cooling channel 41 into the heat exchange water tank 37, and the antifreeze solution in the heat exchange water tank 37 flows back into the engine cooling channel 41 along the water return pipe 38 due to pressure.

Meanwhile, a heat dissipation coil 36 is arranged in the heat exchange water tank 37, one end of the heat dissipation coil 36 is connected with the supercharged air tank 20 through a second air return pipe 35, and the other end of the heat dissipation coil 36 is connected with the supercharged air tank 20 through an air feed pipe 33 and a second air feed pump 34 on the air feed pipeline to form a cooling waste heat circulating system; the heat energy in the heat exchange water tank 37 is carried into the carbon dioxide booster tank 20 by the flow of carbon dioxide.

The upper end of the pressurized gas tank 20 is connected with a three-way control valve 22 through a gas outlet pipe 21, an outlet of the three-way control valve 22 is connected with a gas distribution mechanism 24 and then connected with a gas spraying pipe 25, the gas spraying pipe 25 leads to an internal combustion engine cylinder 27 and is connected with a gas nozzle 26, the other outlet of the three-way control valve 22 is connected with a gas return pipe 42, and the gas return pipe 42 is connected with the liquid carbon dioxide storage tank 1 to form a carbon dioxide gas return pipeline. A second valve 23 is provided between the three-way control valve 22 and the cam synchronized switch 24.

All internal combustion engines have the best working temperature, the working condition temperature is lower when the internal combustion engine is started generally, the second valve 23 is closed to supply no carbon dioxide, when the internal combustion engine reaches the specified working condition after working, the second valve 23 is opened to start supplying air to the air injection pipe 25, and the air distribution mechanism 24 controls a spark plug switch or an oil injection switch under the linkage of an internal combustion engine cam: that is, when the piston of the two-stroke internal combustion engine is operated to the top dead center, the gas nozzle 26 injects carbon dioxide into the cylinder 27 while the spark plug ignites or the oil nozzle injects oil; when the piston of the four-stroke internal combustion engine is at the top dead center during the power stroke, the air nozzle 26 sprays carbon dioxide into the cylinder 27 and the spark plug ignites or the oil nozzle sprays oil, at this time, the fuel oil is combusted and expanded in the cylinder, the carbon dioxide is also expanded by heat, and the pressure generated by the exhaust heat absorbed by the carbon dioxide, the cooling heat and the heat dissipation of the passenger cabin 48 jointly pushes the piston to do work, namely, the air nozzle 26 arranged in the cylinder and the oil nozzle or the spark plug ignite to work synchronously, a certain amount of carbon monoxide is generated by incomplete combustion reaction of partial carbon dioxide, fuel oil and oxygen during the power stroke, and the carbon monoxide reaches the exhaust pipe 28 along with the exhaust stroke and then reacts with the limiting emission generated by high-pressure combustion reaction during the operation of the internal combustion engine, namely, nitrogen and carbon dioxide which are relatively.

The pressure of the liquid carbon dioxide in the carbon dioxide storage tank 1 is reduced along with the outflow of the liquid carbon dioxide, the high-temperature and high-pressure carbon dioxide in the air return pipe 42 flows back to the carbon dioxide storage tank 1 to increase the temperature and the pressure of the carbon dioxide, the carbon dioxide stored in the tank can be continuously supplied, the second one-way valve 46 on the air return pipe 42 prevents the carbon dioxide from flowing back to the air return pipe 42, the opening of the air return valve 45 on the air return pipe is controlled to adjust the pressure of the carbon dioxide storage tank 1, and the pressure and the flow of.

The filling port 4 arranged on the carbon dioxide storage tank 1 can facilitate the addition of liquid carbon dioxide, and when the pressure of the carbon dioxide in the carbon dioxide storage tank 1 is critical and safe, the safety valve 2 on the infusion tube 5 is automatically opened, and redundant carbon dioxide is drained to ensure the safety of the storage tank and passengers.

When the carbon dioxide is not used, the liquid outlet valve 3 on the liquid conveying pipe 5 is closed, so that the carbon dioxide is prevented from overflowing and being wasted.

A manual-automatic fire extinguishing valve 43 is arranged on a carbon dioxide pipeline of the section 49 of the internal combustion engine room, carbon dioxide is automatically sprayed to extinguish fire when high temperature is sensed, and a manual fire extinguishing switch 44 is arranged in the passenger compartment 48 to control the carbon dioxide spraying of the manual fire extinguishing valve to extinguish the fire in the internal combustion engine room.

The pneumatic quick connector 50 is arranged on the air return pipeline, a pneumatic power source interface can be provided for vehicles and ships needing pneumatic power, and the high-pressure carbon dioxide in the booster gas tank 20 provides power for braking, steering and the like of the vehicles and ships.

All pipelines and storage tanks which pass through carbon dioxide except the pipeline of the air-conditioning radiator are all provided with heat insulation materials for wrapping and heat insulation.

Bad oil and internal-combustion engine use for a long time and can cause the carbon deposit in the jar, the utility model discloses supply cylinder oil circuit can be closed, the internal-combustion engine is rotated, and carbon dioxide injection volume just can be in the condition that need not to disassemble the internal-combustion engine by oneself clearance jar in the enlarged jar carbon deposit difficult problem.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention.

Claims (3)

1. A four-stroke or two-stroke internal combustion engine using liquid carbon dioxide comprises a liquid carbon dioxide storage tank (1), a liquid conveying pipe (5), a pressurization gas tank (20), a cylinder (27), an exhaust pipe (28), a gas storage tank cabin (47), a passenger cabin (48) and an internal combustion engine cabin (49), and is characterized in that one end of the liquid conveying pipe (5) is connected with the liquid carbon dioxide storage tank (1), and the other end of the liquid conveying pipe is connected with the pressurization gas tank (20) through a first one-way valve (19) to form a carbon dioxide gas supply pipeline;

a radiating pipe (6) and an infusion pump (7) are arranged on the infusion pipe (5), and the infusion pump (7) is positioned at the upper part of the radiating pipe (6); a branch exhaust pipe (16) is arranged on a pipeline between the infusion pump (7) and the first one-way valve (19);

a closed isolation cover (8) is wrapped outside the radiating pipe (6), an external leakage release pipe (9) is arranged on the closed isolation cover (8) and leads to the outside of a passenger compartment (48), and a sealing cover (10) is arranged at the port of the external leakage release pipe (9); a replacement air shell (11) is arranged outside the closed isolation cover (8), an outer ventilation opening (15) leading to the outside of the passenger compartment, an inner circulation ventilation opening (12) leading to the inside of the passenger compartment and an air supply opening (14) with a fan are arranged on the ventilation shell (11) to form a human body heat dissipation and climate heat circulation system of the passenger compartment, and a two-way change switch (13) controls the closing of the inner circulation ventilation opening (12) and the outer ventilation opening (15);

a heat exchange water tank (37) is arranged in the internal combustion engine cabin (49), a heat dissipation coil (36) is arranged in the heat exchange water tank (37), one end of the heat dissipation coil (36) is connected with the supercharging gas tank (20) through a second air return pipe (35), and the other end of the heat dissipation coil is connected with the supercharging gas tank (20) through an air supply pipe (33) and a second air supply pump (34) on an air supply pipeline to form a cooling waste heat circulating system;

meanwhile, the heat exchange water tank (37) is connected with a cooling channel (41) of the internal combustion engine through a water return pipe (38), and the other end of the cooling channel (41) of the internal combustion engine is communicated with a water pump (39) through a water delivery pipe (40) and then is connected with the heat exchange water tank (37) to form a cooling water circulation system of the internal combustion engine;

a heat exchanger (29) is arranged on the exhaust pipe (28), one end of the heat exchanger (29) is connected with the supercharged gas tank (20) through an air pipe (32) and a first air pump (31) on the air pipe, and the other end of the heat exchanger (29) is connected with the carbon dioxide supercharged gas tank (20) through a first air return pipe (30), so that a heat circulation system for exhaust gas discharged by the internal combustion engine is formed;

the upper end of the pressure boosting air tank (20) is connected with a three-way control valve (22) through an air outlet pipe (21), one outlet of the three-way control valve (22) is connected with an air distribution mechanism (24) and then is connected with an air injection pipe (25), the air injection pipe (25) leads to an internal combustion engine cylinder (27) and is connected with an air injection nozzle (26), the other outlet of the three-way control valve (22) is connected with an air return pipe (42), and the air return pipe (42) is connected with the liquid carbon dioxide storage tank (1) to form a carbon dioxide air return pipeline;

an air nozzle (26) arranged in the cylinder operates synchronously with the ignition of the fuel injection nozzle or the spark plug.

2. A four-stroke or two-stroke internal combustion engine using liquid carbon dioxide as claimed in claim 1, wherein the branched exhaust pipe (16) is provided with a first valve (17) and an external release port (18).

3. The four-stroke or two-stroke internal combustion engine using liquid carbon dioxide as claimed in claim 1, wherein both ends of the carbon dioxide muffler (42) are respectively connected to the three-way control valve (22) and the liquid carbon dioxide storage tank (1), the carbon dioxide muffler (42) is sequentially provided with the air return valve (45), the pneumatic quick coupling (50) and the second check valve (46), the manual-automatic fire extinguishing valve (43) is provided on the internal combustion engine compartment (49) section of the carbon dioxide muffler (42), and the manual fire extinguishing switch (44) provided in the passenger compartment (48) can manually control the opening of the manual-automatic fire extinguishing valve (43).

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