CN108087103A - A kind of internal-combustion engine system - Google Patents

Abstract

The invention discloses an internal combustion engine system, comprising: an internal combustion engine (1); a first turbine (2) and a first compressor (3) for turbocharging, the two are connected through a first shaft system (7); a second turbine (4), coaxially connected with the second compressor (5) motor (6) through the second shafting system (8); between the first shafting system (7) and the second shafting system (8) through the third shafting system (9) connected for power exchange; the second shaft system (8) is equipped with a first clutch (10) to control the power transmission between the second turbine (4) and the motor (6); the third shaft system (9 ) is installed with a second clutch (11) to control the power transmission between the first shaft system (7) and the second shaft system (8). The internal combustion engine system of the present invention realizes the effects of rapid turbine response, power increase and waste gas energy utilization under low-speed working conditions and further utilization of exhaust gas energy under high-speed working conditions through the on-off control of the two clutches under different working conditions.

Description

an internal combustion engine system

technical field

The invention relates to the technical field of internal combustion engines, in particular to an internal combustion engine system.

Background technique

Internal combustion engines play a very important role in national production and life. At present, the vast majority of vehicles and ships are powered by internal combustion engines. The internal combustion engine consumes a large amount of fossil fuels, but on average only 30%-40% of the energy is converted into mechanical energy, and nearly 60%-70% of the energy is dissipated into the atmosphere in the form of heat transfer during the working process of the internal combustion engine. Among them, the exhaust gas energy emitted by the internal combustion engine accounts for about 30% of the total energy. That is to say, the energy actually utilized by the internal combustion engine is in the same proportion as the exhaust gas energy emitted, which causes a great waste of energy. Recycling the exhaust energy of internal combustion engines and continuously improving energy utilization efficiency are important means to achieve energy conservation and emission reduction, and are of great significance to the sustainable development of the global economy.

In order to solve the above problems, it is a very effective technical means to recover and utilize the exhaust gas energy of internal combustion engines by using turbocharging in the prior art, and it is widely used at present. Most of the existing diesel engines and about 40% of gasoline engines have adopted turbocharging technology. The technical scheme of prior art mainly contains following several kinds:

1. Solution 1: As shown in Figure 1, it is a schematic structural diagram of a turbocharged internal combustion engine system widely used in the prior art. Its working principle is: the exhaust gas discharged from the internal combustion engine 1 enters the first turbine 2 to expand and perform work, and the first turbine 2 outputs work to the first compressor 3 through the first shafting 7, and the first compressor 3 compresses air, increasing the intake pressure and Density, the compressed gas enters the intercooler 12 for cooling, reduces the intake air temperature, further increases the intake air density, and improves the power performance of the internal combustion engine 1 . The exhaust gas passing through the first turbine 2 is discharged into the atmosphere after being processed. However, in this solution, the exhaust gas discharged after passing through the first turbine 2 still has a relatively high temperature, and a part of energy cannot be recovered, and the exhaust energy of the internal combustion engine is insufficiently utilized.

2. Scheme 2: In order to further utilize the exhaust gas energy discharged by the turbine in Scheme 1, the technical scheme of the prior art is to add a turbocharging system behind the first turbine 2 on the basis of Scheme 1, and adopt two-stage turbocharging technology , the two-stage turbo is used for intake boosting, but this solution is not suitable for situations where the power demand of the internal combustion engine is not large, and the matching of the two-stage supercharging system with the internal combustion engine is more complicated. At the same time, the exhaust gas expanded by the two-stage turbine still has a certain amount of recyclable energy, and this part of energy has not been recycled.

3. Scheme 3: When a single-stage turbocharger can meet the power requirements of the internal combustion engine, in order to avoid complicated system matching, two-stage turbocharger technology is generally not used. Instead, on the basis of Scheme 1, the technology of adding a power turbine behind the first turbine 2 is used to further recover the exhaust gas energy of the internal combustion engine, but this scheme requires that the gas pressure entering the power turbine is higher than atmospheric pressure, so when entering the power turbine When the exhaust gas pressure is close to the atmospheric pressure, the working ability of the power turbine is limited, and it is impossible to further recover the exhaust gas energy of the internal combustion engine.

Contents of the invention

(1) Purpose of the invention

The object of the present invention is to provide an internal combustion engine system. Two stages of turbines are connected in series behind the internal combustion engine. The first stage turbine drives a compressor through a shaft system to form a turbocharging system to improve the power of the internal combustion engine. The second stage turbine drives another compressor through a shaft system to form an inverse engine. The Wrayton cycle system further recovers the exhaust gas energy of the internal combustion engine. The reverse Brayden cycle system is to pass the exhaust gas into the turbine, and then connect a cooling device and a compressor after the turbine, and the outlet of the compressor is the atmosphere. After the exhaust gas is expanded by the turbine, it enters the cooling device for cooling, and then is compressed to atmospheric pressure by the compressor and discharged into the atmosphere. This process is called the reverse Brayden cycle. It solves the problem of insufficient utilization of the exhaust gas energy of the internal combustion engine in the prior art, and at the same time solves the problem in the prior art that the exhaust energy of the internal combustion engine cannot be further recovered due to the limited working capacity of the power turbine. By using the reverse Brayden cycle system to further recover the exhaust gas energy, it solves the problem in the prior art that part of the exhaust gas energy cannot be recovered due to the use of two-stage turbocharging, and it is not suitable for the situation where the power demand of the internal combustion engine is not large. At the same time, the motor is connected to the turbocharger system and the reverse Brayden cycle system through the shaft system, and the power transmission is controlled by the clutch, which can freely control the motor for power output or power generation. While improving the turbine response characteristics, further Harnesses the exhaust gas energy of the engine.

(2) Technical solutions

In order to solve the above problems, the present invention provides an internal combustion engine system, comprising: an internal combustion engine, on which an air inlet and an exhaust port are arranged; a first turbine, whose inlet is connected to the exhaust port of the internal combustion engine; a first compressor, Its inlet communicates with the atmosphere, and its outlet communicates with the intake port of the internal combustion engine; the second turbine, its inlet communicates with the outlet of the first turbine; the second compressor, its inlet communicates with the outlet of the second turbine, and its outlet connected to the atmosphere; the motor, which exchanges power with the outside world through a rotating shaft; the first turbine is connected to the first compressor through the first shafting, and is used to drive the first compressor to rotate and perform compression work; the second The turbine is coaxially connected with the second compressor and the motor through the second shaft system, and is used to drive the second compressor to rotate to perform compression work and the motor to rotate to generate electricity.

Further, a first clutch is installed on the second shafting, and the installation position of the first clutch is between the second turbine and the motor for controlling the power between the second turbine and the motor transmission.

Further, the first shafting and the second shafting are connected through a third shafting to transmit power.

Further, the connection position of the third shaft system and the second shaft system is between the motor and the first clutch.

Further, a second clutch is installed on the third shafting, which is used to control the power transmission between the electric motor and the first compressor.

Further, the internal combustion engine system further includes: an intercooler, the inlet of which is connected to the outlet of the first compressor, and the outlet is connected to the intake port of the internal combustion engine, for cooling the gas discharged by the first compressor, And increase the intake air density of the internal combustion engine.

Further, the intercooler is an air-cooled or water-cooled heat exchanger.

Further, the internal combustion engine system further includes: a cooling device, which is arranged between the second turbine and the second compressor, and is used for cooling the gas discharged by the second turbine.

Further, the cooling device is at least one of a thermoelectric conversion component, a Rankine cycle system and an organic Rankine cycle system.

Further, the inlet of the thermoelectric conversion component is connected to the outlet of the turbine, and the outlet is connected to the inlet of the second compressor for cooling the gas discharged by the turbine and converting the absorbed heat energy into electric energy for output.

Further, the Rankine cycle system or the organic Rankine cycle system includes: a first heat exchange component, the first inlet of which is connected to the outlet of the second turbine, and the first outlet is connected to the inlet of the second compressor; a steam turbine, whose inlet is connected to the second outlet of the first heat exchange component; a second heat exchange component, whose inlet is connected to the outlet of the steam turbine; a pump, whose inlet is connected to the outlet of the second heat exchange component, The outlet is connected to the second inlet of the first heat exchange component; the steam turbine outputs power through the fourth shaft system; the Rankine cycle system or organic Rankine cycle system is used to cool the gas discharged by the second turbine, At the same time, the absorbed heat is converted into power output.

(3) Beneficial effects

The technical solution of the present invention has the following beneficial technical effects:

In the internal combustion engine system provided by the present invention, two stages of turbines are connected in series after the internal combustion engine. The first stage turbine drives a compressor through a shafting system to form a turbocharger system to improve the power of the internal combustion engine. The second stage turbine passes through the shafting system. Drive another compressor to form a reverse Brayden cycle system to further recover the exhaust energy of the internal combustion engine, which solves the problem of insufficient utilization of the exhaust energy of the internal combustion engine in the prior art, and at the same time solves the problem of limited working capacity of the power turbine in the prior art , the problem that the exhaust gas energy of the internal combustion engine cannot be further recovered. By using the reverse Brayden cycle system to further recover the exhaust gas energy, it solves the problem in the prior art that part of the exhaust gas energy cannot be recovered due to the use of two-stage turbocharging, and it is not suitable for the situation where the power demand of the internal combustion engine is not large. At the same time, the motor is connected to the turbocharger system and the reverse Brayden cycle system through the shaft system, and the power transmission is controlled by the clutch, which can freely control the motor for power output or power generation. While improving the turbine response characteristics, further Harnesses the exhaust gas energy of the engine.

The internal combustion engine system of the present invention absorbs the heat energy of exhaust gas through the thermoelectric material to reduce the temperature of the gas, and meanwhile, the thermoelectric material converts the absorbed heat energy into electric energy, further improving the recycling rate of exhaust gas energy of the internal combustion engine.

The internal combustion engine system of the present invention can also utilize the Rankine cycle system and the organic Rankine cycle system to recycle the heat absorbed by the heat exchanger in the reverse Brayden cycle system, further improving the recovery rate of exhaust gas energy of the internal combustion engine.

Description of drawings

Fig. 1 is a schematic structural view of a turbocharged internal combustion engine system in the prior art;

Fig. 2 is a schematic diagram of the composition of the internal combustion engine system provided by Embodiment 1 of the present invention;

Fig. 3 is a schematic structural diagram of an internal combustion engine system provided by Embodiment 1 of the present invention;

Fig. 4 is a schematic structural diagram of an internal combustion engine system provided by Embodiment 2 of the present invention;

Fig. 5 is a schematic structural diagram of an internal combustion engine system provided by Embodiment 4 of the present invention;

Fig. 6 is a schematic structural diagram of the internal combustion engine system provided by Embodiment 5 of the present invention;

Fig. 7 is a schematic structural diagram of the internal combustion engine system provided by Embodiment 6 of the present invention.

Reference signs:

1. Internal combustion engine, 2. First turbine, 3. First compressor, 4. Second turbine, 5. Second compressor, 6. Electric motor, 7. First shafting, 8. Second shafting, 9. The third shaft system, 10, the first clutch, 11, the second clutch, 12, the intercooler, 131, the thermoelectric conversion component, 132, the first heat exchange component, 133, the steam turbine, 134, the second heat exchange component, 135 , pump, 136, the fourth shafting, 137, the third heat exchange component.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

Embodiment one

Fig. 2 is a schematic diagram of the composition of the internal combustion engine system provided by Embodiment 1 of the present invention.

Fig. 3 is a schematic structural diagram of the internal combustion engine system provided by Embodiment 1 of the present invention.

Please refer to Fig. 2 and Fig. 3, the present invention provides an internal combustion engine system, including: internal combustion engine 1, first turbine 2, first compressor 3, second turbine 4, second compressor 5, motor 6, first shafting 7. The second shaft system 8 and the third shaft system 9.

An internal combustion engine 1 is provided with an intake port and an exhaust port. The internal combustion engine 1 is a kind of power machine, which burns fuel inside and directly converts the heat energy released by the fuel combustion into a heat engine for power.

The inlet of the first turbine 2 is connected to the exhaust port of the internal combustion engine 1 , and the outlet is connected to the second turbine 4 .

The first compressor 3 has an inlet connected to the atmosphere and an outlet connected to the intake port of the internal combustion engine 1, and is used to compress the atmosphere and send it into the internal combustion engine 1 to participate in combustion and work, thereby improving the power of the internal combustion engine 1.

The inlet of the second turbine 4 is connected to the outlet of the first turbine 2 , and the outlet is connected to the second compressor 5 .

The inlet of the second compressor 5 is connected to the outlet of the second turbine 4, and the outlet is connected to the atmosphere, for compressing the gas discharged from the second turbine 4 and discharging it into the atmosphere.

The first turbine 2 is connected with the first compressor 3 through the first shaft system 7, and is used to drive the first compressor 3 to rotate and perform compression work.

The second turbine 4 is connected with the second compressor 5 through the second shaft system 8, and is used to drive the second compressor 5 to rotate and perform compression work. The second turbine 4 inputs power to the motor 6 through the second shaft system 8 to drive the motor 6 to rotate and generate electricity.

A first clutch 10 is installed between the second turbine 4 and the motor 6 to control power transmission.

The first shaft system 7 is connected to the second shaft system 8 through a third shaft system 9, and a second clutch 11 is installed on the third shaft system 9 to control power transmission.

Referring to FIG. 2 , the connection position between the third shaft system 9 and the second shaft system 8 is between the motor 6 and the first clutch 10 .

Referring to Fig. 2, in this embodiment, the internal combustion engine system also includes an intercooler 12, the inlet of which is connected to the outlet of the first compressor 3, and the outlet is connected to the air inlet of the internal combustion engine 1 for cooling the first compressor 3 Exhaust gas, and increase the intake air density of the internal combustion engine 1.

Please refer to FIG. 3 , optionally, the intercooler 12 is an air-cooled or water-cooled heat exchanger, but the present invention is not limited thereto.

Please refer to FIG. 2 , in this embodiment, the internal combustion engine system further includes a cooling device 13 disposed between the second turbine 4 and the second compressor 5 for cooling the gas discharged from the second turbine 4 .

Please refer to FIG. 3 , in this embodiment, the cooling device 13 is a thermoelectric conversion component 131, the inlet of the thermoelectric conversion component 131 is connected to the outlet of the second turbine 4, and the outlet is connected to the inlet of the second compressor 5 for cooling the first compressor. The gas discharged by the second turbine 4 converts the absorbed heat energy into electric energy output.

Optionally, the material of the thermoelectric conversion component 131 is a thermoelectric material, which is a material that can convert thermal energy into electrical energy.

Please refer to FIG. 3 , specifically, the first turbine 2 and the first compressor 3 are connected through a first shafting 7 , and the first turbine 2 drives the first compressor 3 to rotate compressed air. The second turbine 4 and the second compressor 5 are connected through the second shafting 8, the second turbine 4 drives the second compressor 5 to rotate, and the second turbine 4 is connected to the motor 6 through the second shafting 8, and the driving motor 6 rotates to generate electricity . The first clutch 10 is installed between the second turbine 4 and the motor 6 to control the power transmission of the second turbine 4 to the motor 6 , and the second clutch 11 is installed on the third shafting 9 to control the motor 6 and the first compressor 3 power transmission between. According to the gas flow direction, the components are arranged in the order of the first compressor 3 , the intercooler 12 , the internal combustion engine 1 , the first turbine 2 , the second turbine 4 , the thermoelectric conversion component 131 and the second compressor 5 . Among them, the first turbine 2, the first compressor 3, and the intercooler 12 form a turbocharging system; the second turbine 4, the second compressor 5, and the thermoelectric conversion component 131 form a reverse Brayden cycle system, and the exhaust gas passes through the first The process in which the second turbine 4 expands to perform work, and then enters the second compressor 5 to compress to atmospheric pressure after being cooled by the thermoelectric conversion component 131 is called reverse Brayden cycle.

The working principle of internal combustion engine system of the present invention is introduced below:

Please refer to Fig. 2, the exhaust gas generated by the operation of the internal combustion engine 1 enters the first turbine 2 to expand and perform work. The first turbine 2 is connected with the first compressor 3 through the first shafting 7, drives the first compressor 3 to rotate, compresses air, and makes the internal combustion engine The pressure and density of the intake air of the internal combustion engine 1 are increased, and after being cooled by the intercooler 12, the intake air density of the internal combustion engine 1 is further increased, which is beneficial to improving the power performance of the internal combustion engine 1 . The air after supercharging and cooling enters the internal combustion engine 1 to mix with fuel for combustion.

The gas expanded through the first turbine 2 still has a relatively high temperature and pressure, and enters the second turbine 4 again to expand and perform work. The second turbine 4 is connected to the second compressor 5 through the second shafting 8 to drive the second compressor. 5 turn. The outlet of the second air compressor 5 is an atmospheric environment, and the rotating compressed air of the second air compressor 5 can form a vacuum environment at its inlet end. The outlet of the second turbine 4 is almost equal to the inlet pressure of the second compressor 5, only through the pressure loss generated by the pipeline and the thermoelectric conversion component 131, and this part of the loss is very small, therefore, the outlet pressure of the second turbine 4 is lower than atmospheric pressure. The gas expanded through the first turbine 2 still has a relatively high temperature and pressure, and enters the second turbine 4 to expand below the atmospheric pressure. The expansion is relatively large, and more work is done, that is, more waste gas energy is recovered and utilized. The exhaust gas passing through the second turbine 4 is cooled by the thermoelectric conversion element 131, and the temperature of the gas is lowered. The internal combustion engine exhaust gas of the same mass flow is expanded through the second turbine 4 and compressed by the second compressor 5. Since the temperature and pressure of the gas entering the second compressor 5 are much lower than the temperature and pressure of the gas entering the second turbine 4, the compressed gas Power consumption will be relatively small. The second turbine 4 is connected with the motor 6 through the second shaft system 8, and drives the motor 6 to generate electricity with the remaining mechanical energy.

Meanwhile, a first clutch 10 is installed between the second turbine 4 and the motor 6 to control the power transmission between the second turbine 4 and the motor 6 . The first shaft system 7 and the second shaft system 8 are connected through the third shaft system 9, and the second clutch 11 is installed on the third shaft system 9 to control the power transmission between the motor 6 and the first compressor 3 . The connection and disconnection of the first clutch 10 and the second clutch 11 are determined by the operating conditions of the internal combustion engine 1. When the internal combustion engine 1 operates at a low speed, the first clutch 10 is disconnected, the second clutch 11 is connected, and the motor 6 Connected with the first shaft system 7, at this time the motor 6 consumes electric energy and outputs power to the outside, assisting the first turbine 2 to drive the first compressor 3 to rotate compressed air, improving the power of the internal combustion engine 1 under low-speed conditions, and improving the low-speed turbine Response characteristics, at this time, the reverse Brayden system only utilizes the exhaust gas energy discharged from the first turbine 2 through the thermoelectric conversion component 131; when the internal combustion engine 1 is running at a medium-high speed condition, the first clutch 10 is turned on, and the second clutch 11 is turned off open, the motor 6 is connected to the second shaft system 8, and the second turbine 4 drives the motor 6 to rotate. At this time, the motor 6 consumes mechanical energy and converts it into electrical energy. At this time, the reverse Brayden system passes through the thermoelectric conversion component 131 and the second turbine 4. The motor 6 inputs mechanical energy to utilize the energy of the exhaust gas passing through the first turbine 2 at the same time, so as to improve the energy utilization rate of the exhaust gas. The internal combustion engine system of the present invention, through the on-off control of the two clutches under different working conditions, realizes the effect of fast response of the turbine under low-speed working conditions, power increase and exhaust gas energy utilization, and further utilization of exhaust gas energy under high-speed working conditions, improving Overall performance of the internal combustion engine system.

Embodiment two

In the technical solution of the first embodiment, the thermoelectric conversion component 131 absorbs the heat of the exhaust gas to achieve the purpose of reducing the temperature of the exhaust gas, and converts the absorbed heat energy into electrical energy for output. In addition to the thermoelectric conversion component 131, the Rankine cycle can also achieve the purpose of cooling the exhaust gas and utilizing the energy of the exhaust gas. Therefore, in this embodiment, a Rankine cycle system is used instead of the thermoelectric conversion component 131 to further recycle the heat absorbed by the first heat exchange component 132 to improve energy utilization.

Please refer to FIG. 4 , in this embodiment, the Rankine cycle system includes a first heat exchange component 132 , a steam turbine 133 , a second heat exchange component 134 and a pump 135 .

The first inlet of the first heat exchange component 132 is connected to the outlet of the second turbine 4 , and the first outlet is connected to the inlet of the second compressor 5 .

The inlet of the steam turbine 133 communicates with the second outlet of the first heat exchange component 132 .

The inlet of the second heat exchange component 134 is connected to the outlet of the steam turbine 133 .

Optionally, the second heat exchange component 134 is an air-cooled or water-cooled heat exchanger, but the present invention is not limited thereto.

The inlet of the pump 135 is connected to the outlet of the second heat exchange component 134 , and the outlet is connected to the second inlet of the first heat exchange component 132 .

The steam turbine 133 outputs power through the fourth shaft system 136 . Specifically, one end of the fourth shaft system 136 is connected to the steam turbine 133, and the other end outputs power to an external power device.

The Rankine cycle system is used to cool the gas discharged from the second turbine 4, and at the same time convert the absorbed heat into power output, further recycle the exhaust gas energy of the internal combustion engine 1, and improve the energy utilization rate.

Specifically, the pump 135 provides power for the flow of the working fluid in the Rankine cycle system, and the working fluid passes through the first heat exchange component 132 to exchange heat with the exhaust gas discharged from the second turbine 4 . The working fluid of the Rankine cycle system is heated and the exhaust gas is cooled. The heated working fluid enters the steam turbine 133 , expands in the steam turbine 133 to perform work, and the mechanical energy generated by the work is output through the fourth shaft system 136 . The expanded working fluid enters the second heat exchange component 134 to be cooled, and then enters the pump 135 for circulation. This method can further recycle the exhaust gas energy of the internal combustion engine 1, thereby improving the energy utilization rate.

The structure, connection relationship and clutch control strategy of other parts in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

Embodiment Three

The difference between this embodiment and the second embodiment is that an organic Rankine cycle system is used instead of the Rankine cycle system.

The structure, composition and working principle of the organic Rankine cycle system and the Rankine cycle system are the same, the only difference is that the circulating working medium in the Rankine cycle system is water, and the circulating working medium in the organic Rankine cycle system is organic matter.

The structure, connection relationship and clutch control strategy of other parts in this embodiment are the same as those in Embodiment 3, and will not be repeated here.

Embodiment four

Please refer to Fig. 5, the difference between this embodiment and Embodiment 1 and Embodiment 2 is that the cooling device 13 in this embodiment adopts the thermoelectric conversion component 131 and the third heat exchange component 137 to discharge the heat from the second turbine 4 at the same time. Cooling the gas can further increase the cooling effect, so that the second turbine 4 can have more residual mechanical energy to output, and at the same time, it can also convert the heat energy absorbed by the thermoelectric conversion component 131 into electrical energy output, and further utilize the exhaust gas discharged from the first turbine 2 energy.

Please refer to FIG. 5. Specifically, the gas discharged from the second turbine 4 first passes through the thermoelectric conversion component 131, and then passes through the third heat exchange component 137 to be connected to the inlet of the second compressor 5, that is, the inlet of the thermoelectric conversion component 131 is connected to The outlet of the second turbine 4 is connected to the inlet of the third heat exchange component 137 , and the outlet of the third heat exchange component 137 is connected to the inlet of the second compressor 5 .

The present invention is not limited thereto. The gas discharged from the second turbine 4 may first pass through the third heat exchange component 137, and then pass through the thermoelectric conversion component 131 to be connected to the inlet of the second compressor 5, that is, the third heat exchange component 137 The inlet of is connected to the outlet of the second turbine 4 , the outlet is connected to the inlet of the thermoelectric conversion component 131 , and the outlet of the thermoelectric conversion component 131 is connected to the inlet of the second compressor 5 .

The structure, connection relationship and clutch control strategy of other parts in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

Embodiment five

Please refer to Fig. 6, the difference between this embodiment and Embodiment 1 and Embodiment 2 is that the cooling device 13 in this embodiment is the thermoelectric conversion component 131 in Embodiment 1 and the Rankine cycle in Embodiment 2 The system is combined, that is, the thermoelectric conversion component 131 and the Rankine cycle system are used to cool the gas discharged from the second turbine 4. While increasing the cooling effect, the heat absorbed by the first heat exchange component 132 is further recycled to Improve energy utilization.

Please refer to FIG. 6. Specifically, the gas discharged from the second turbine 4 first passes through the hot spot conversion component 131, and then passes through the first heat exchange component 132 in the Rankine cycle system to connect to the inlet of the second compressor 5, that is, thermoelectric conversion The inlet of the component 131 is connected to the outlet of the second turbine 4, the outlet is connected to the first inlet of the first heat exchange component 132 in the Rankine cycle system, and the first outlet of the first heat exchange component 132 is connected to the second compressor 5 Entrance.

The present invention is not limited thereto. The gas discharged from the second turbine 4 may first pass through the first heat exchange component 132 in the Rankine cycle system, and then pass through the thermoelectric conversion component 131 to be connected to the inlet of the second compressor 5, namely In the Rankine cycle system, the first inlet of the first heat exchange component 132 is connected to the outlet of the second turbine 4, the first outlet is connected to the inlet of the thermoelectric conversion component 131, and the outlet of the thermoelectric conversion component 131 is connected to the outlet of the second compressor 5. Entrance.

The structure, connection relationship and clutch control strategy of other parts in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

Implementation column six

Please refer to Fig. 7, the difference between this embodiment and Embodiments 1 to 5 is that the cooling device 13 in this embodiment is the thermoelectric conversion component 131 in Embodiment 1, the Rankine cycle system in Embodiment 2 1. Combine the organic Rankine cycle system in the third embodiment with the third heat exchange component 137 in the fourth embodiment, that is, use the thermoelectric conversion component 131, the Rankine cycle system, the organic Rankine cycle system and the third heat exchange component at the same time 137 cools the gas discharged from the second turbine 4. While increasing the cooling effect, it can also convert the heat energy absorbed by the thermoelectric conversion component 131 into electrical energy output, and at the same time pass the heat energy absorbed by the first heat exchange component 132 through the Rankine cycle or The Organic Rankine Cycle system further recycles to improve energy utilization.

Specifically, the gas discharged from the second turbine 4 first passes through the thermoelectric conversion unit 131, then passes through the Rankine cycle system, then passes through the third heat exchange unit 137, and finally passes through the third heat exchange unit 137 and is connected to the second compressor 5. Entrance.

The present invention is not limited thereto. The gas discharged from the second turbine 4 may first pass through a Rankine cycle, an organic Rankine cycle, and a thermoelectric conversion component 131, and finally pass through a third heat exchange component 137 to be connected to the second compressor 5. Entrance.

In this embodiment, the arrangement sequence of the thermoelectric conversion component 131, the Rankine cycle system, the organic Rankine cycle system, and the third heat exchange component 137 includes but not limited to the above-mentioned several sequences, the thermoelectric conversion component 131, the Rankine cycle system The organic Rankine cycle system and the third heat exchange component 137 can also be arranged in other orders, and the specific arrangement order can be appropriately adjusted according to actual needs.

The structure and connection relationship of other parts in this embodiment and the control strategy of the clutch are the same as those in Embodiment 1, and will not be repeated here.

In the second and fifth embodiments above, the Rankine cycle system in the cooling device 13 may also be replaced by an organic Rankine cycle system.

The purpose of the present invention is to protect an internal combustion engine system. The internal combustion engine system of the present invention uses a clutch to control the power transmission of two groups of turbine systems, and realizes the functions of electric power boosting under low-speed working conditions of the internal combustion engine and further recovery of exhaust gas energy under high-speed working conditions. At the same time, the use of thermoelectric materials enables the further utilization of the exhaust gas energy of the engine under low-speed conditions, greatly improving the overall performance of the engine. The internal combustion engine system of the present invention can also utilize the Rankine cycle system to recycle the heat absorbed by the heat exchanger in the reverse Brayton cycle system, further improving the recovery rate of the exhaust gas energy of the internal combustion engine.

In the description of the present invention, it should be noted that the terms "first", "second", "third" and "fourth" are used for description purposes only, and should not be understood as indicating or implying relative importance.

It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and not to limit the present invention. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention shall fall within the protection scope of the present invention. Furthermore, it is intended that the appended claims of the present invention cover all changes and modifications that come within the scope and metespan of the appended claims, or equivalents of such scope and metesight.

Claims (11)

1. a kind of internal-combustion engine system, which is characterized in that including：

Internal combustion engine (1) sets air inlet and exhaust outlet thereon；

First turbine (2), entrance are communicated to the exhaust outlet of the internal combustion engine (1)；

First compressor (3), entrance connection air, outlet to the air inlet of the internal combustion engine (1)；

Second turbine (4), entrance are communicated to the outlet of first turbine (2)；

Second compressor (5), entrance are communicated to the outlet of second turbine (4), and the outlet of second compressor (5) connects Lead to air；

Motor (6) is connected by rotation axis with the external world；

First turbine (2) is connected by the first shafting (7) with first compressor (3), for this to be driven first to calm the anger Machine (3) rotation is compressed acting；

Second turbine (4) is used by the second shafting (8) connection coaxial with second compressor (5) and the motor (6) In driving, second compressor (5) rotation is compressed acting and motor (6) rotation generates electricity；

First shafting (7) is connected with the second shafting (8) by the 3rd shafting (9), for the power transmission between two shaftings.

2. system according to claim 1, which is characterized in that further include：

First clutch (10) is installed on the second shafting (8), installation site between second turbine (4) with it is described Between motor (6).

3. according to the system described in 1 or 2 any one of claim, which is characterized in that

The link position of 3rd shafting (9) and second shafting (8) is between the motor (6) and the first clutch (10) between.

4. system according to claim 1, which is characterized in that further include：

Second clutch (11) is installed on the 3rd shafting (9).

5. system according to claim 1, which is characterized in that further include：

Charge air cooler (12), entrance are communicated to the outlet of first compressor (3), and the outlet of the charge air cooler (12) arrives The air inlet of the internal combustion engine (1) for cooling down the gas of the first compressor (3) discharge, and increases the internal combustion engine (1) Density of the induced air.

6. system according to claim 5, which is characterized in that

The charge air cooler (12) is air-cooled or water cooling heat exchanger.

7. system according to claim 1, which is characterized in that further include：

Cooling device (13) is arranged between second turbine (4) and the second compressor (5), for cooling down described second The gas of turbine (4) discharge.

8. system according to claim 7, which is characterized in that

The cooling device (13) be thermoelectric conversion member (131), Rankine cycle system and organic rankine cycle system in extremely Few one kind.

9. system according to claim 8, which is characterized in that

The entrance of the thermoelectric conversion member (131) is communicated to the outlet of second turbine (4), the thermoelectric conversion member (131) outlet to second compressor (5) entrance, for cooling down the gas of second turbine (4) discharge, and The thermal energy of absorption is converted into electric energy output.

10. system according to claim 8, which is characterized in that the Rankine cycle system or organic rankine cycle system Including：

First heat exchanger components (132), first entrance are communicated to the outlet of second turbine (4), first heat exchanger components (132) first outlet is communicated to the entrance of second compressor (5)；

Steam turbine (133), entrance are communicated to the second outlet of first heat exchanger components (132)；

Second heat exchanger components (134), entrance are communicated to the outlet of the steam turbine (133)；

It pumps (135), entrance is communicated to the outlet of second heat exchanger components (134), the outlet for pumping (135) to institute State the second entrance of the first heat exchanger components (132)；

The steam turbine (133) exports power to power set by the 4th shafting (136)；

The Rankine cycle system or organic rankine cycle system are used to cool down the gas of the second turbine (4) discharge, simultaneously The heat of absorption is converted into power output.

11. system according to claim 10, which is characterized in that

The power set are generator or the bent axle of the internal combustion engine (1).