CN102966470A - Pressure-controlled exhaust energy recovering system - Google Patents

Abstract

A pressure-controlled exhaust energy recovery system in the technical field of internal combustion engines, comprising: an intake pipe, an engine, an exhaust pipe, a compressor, a turbine, a connecting pipe, a volume chamber, a moving body and a spring, and the moving body is installed in the volume chamber and connected to the The inner wall of the volume chamber is in sealing contact, the through pipe runs through the upper and lower walls of the moving body, and the two ends of the spring are respectively connected with the right wall of the moving body and the right wall of the volume chamber. When the engine is in a low-speed working condition, the moving body moves to the left in the volume chamber, the second connecting pipe is connected with the fifth connecting pipe, and the waste heat of the exhaust heats the intake air, and the engine has better cold start performance; when the engine is in a high-speed working condition In this case, the moving body moves to the right in the volume cavity, and the second connecting pipe is separated from the fifth connecting pipe. The invention has reasonable design and simple structure, and is suitable for an engine intake heating system with a turbocharger.

Description

Pressure-controlled exhaust energy recovery system

technical field

The invention relates to an intake and exhaust system in the field of internal combustion engines, in particular to a pressure-controlled exhaust energy recovery system with a turbocharger.

Background technique

Harmful emissions from engines are a major source of air pollution. With the increasing importance of environmental protection, the goal of reducing harmful emissions from engines has become an important direction for engine development in the world today. With the world's consumption of petroleum products increasing year by year, the international oil price remains high, and the economy of the engine is becoming more and more prominent. Therefore, it is the primary task of engine designers to carry out research on the control methods of engine harmful emissions. By heating the intake system of the engine, it can not only improve the cold start performance of the engine under harsh conditions, but also reduce the exhaust pollution of the engine during the cold start process.

After searching the existing technical documents, it is found that Chinese patent application number 200610062955.5, patent name: an engine air intake heating device, this patent technology provides an engine air intake heating device, which can better improve the cold start work of the engine However, the heating of the intake air is realized through special electric heating, which makes the heating system more complicated.

Contents of the invention

Aiming at the deficiencies of the prior art above, the present invention provides a pressure-controlled exhaust energy recovery system, so that the intake air heating can be self-regulated, better taking into account the various speed conditions of the engine, and the structure is simple and does not require special control mechanism.

The present invention is achieved through the following technical solutions, the present invention comprises: compressor intake pipe, compressor, engine intake pipe, engine, engine exhaust pipe, turbine, turbine exhaust pipe, connecting shaft, volume chamber, volume chamber Wall, lower wall of volume cavity, left wall of volume cavity, right wall of volume cavity, front wall of volume cavity, rear wall of volume cavity, moving body, spring, heat exchanger, first connecting pipe, second connecting pipe, third connecting pipe , the fourth connecting pipe, the fifth connecting pipe, the sixth connecting pipe and the through pipe, the air inlet and outlet of the compressor are respectively connected with the air outlet of the compressor inlet pipe and the air inlet of the engine inlet pipe, and the air inlet and outlet of the engine are respectively connected with the The air outlet of the engine intake pipe is connected with the air inlet of the engine exhaust pipe, the air inlet and outlet of the turbine are respectively connected with the air outlet of the engine exhaust pipe and the air inlet of the turbine exhaust pipe, and the compressor is connected to the turbine through the connecting shaft. The cross-section of the volume cavity is rectangular, the upper wall of the volume cavity, the lower wall of the volume cavity, the left wall of the volume cavity, the right wall of the volume cavity, the front wall of the volume cavity, and the rear wall of the volume cavity are consolidated. The heat exchanger is installed on On the intake pipe of the compressor, the two ends of the first connecting pipe communicate with the engine intake pipe and the upper wall of the volume chamber respectively, and the two ends of the second connecting pipe respectively communicate with the turbine exhaust pipe and one end of the third connecting pipe. The other end of the third connecting pipe communicates with the upper wall of the volume chamber, the two ends of the fourth connecting pipe respectively communicate with the lower wall of the volume chamber and one end of the fifth connecting pipe, and the other end of the fifth connecting pipe communicates with the inlet of the heat exchanger. The gas port is connected, the gas outlet of the heat exchanger is connected with one end of the sixth connecting pipe, the moving body is installed in the volume chamber and is in sealing contact with the inner wall of the volume chamber, the penetrating pipe runs through the upper and lower walls of the moving body, and the two sides of the spring The ends are respectively connected with the right wall of the moving body and the right wall of the volume cavity.

Further, in the present invention, the third connecting pipe, the fourth connecting pipe, and the through pipe are all straight circular pipes with the same inner diameter, the axis of the third connecting pipe coincides with the axis of the fourth connecting pipe, and the axis of the third connecting pipe coincides with the axis of the fourth connecting pipe. The axes through the pipe are in the same plane.

During the working process of the present invention, the moving body can move left and right in the volume cavity. When the engine is in a low-speed working condition, the pressure in the engine intake pipe is low, and the pressure in the volume cavity on the left of the moving body is also low. Under the elastic action of the spring, the moving body moves to the left, and the third connecting pipe passes through the through pipe and the The four connecting pipes are connected, and part of the exhaust gas in the turbine exhaust pipe enters the heat exchanger and then flows out through the sixth connecting pipe, so as to heat the intake air in the compressor intake pipe and improve the cold start performance of the engine; When the engine is in high-speed working condition, the pressure in the engine intake pipe is high, and the pressure in the volume cavity on the left side of the moving body is also high. The moving body moves to the right and compresses the spring, so that the third connecting pipe is separated from the fourth connecting pipe , The exhaust of the engine all flows out from the turbine exhaust pipe, the intake temperature at the compressor inlet is low, the intake air volume of the engine is large, and the performance of the whole machine is better.

Compared with the prior art, the present invention has the following beneficial effects: the present invention is reasonable in design and simple in structure, and is suitable for an air intake heating system with a turbocharger. Gas heating systems do not require special control mechanisms.

Description of drawings

Fig. 1 is a structural schematic diagram of a pressure-controlled exhaust energy recovery system of the present invention;

Fig. 2 is the structural representation of A-A section among Fig. 1;

Among them: 1. Compressor intake pipe, 2. Compressor, 3. Engine intake pipe, 4. Engine, 5. Engine exhaust pipe, 6. Turbine, 7. Turbine exhaust pipe, 8. Connecting shaft, 9. Volume Cavity, 10, the upper wall of the volume cavity, 11, the lower wall of the volume cavity, 12, the left wall of the volume cavity, 13, the right wall of the volume cavity, 14, the front wall of the volume cavity, 15, the rear wall of the volume cavity, 16, the moving body, 17 , spring, 18, heat exchanger, 19, first connecting pipe, 20, second connecting pipe, 21, third connecting pipe, 22, fourth connecting pipe, 23, fifth connecting pipe, 24, sixth connecting pipe , 25, through the pipe.

Detailed ways

The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. This embodiment is based on the technical solution of the present invention, and provides detailed implementation methods and specific operating procedures, but the scope of protection of the present invention is not limited to the following embodiments. .

Example

As shown in Fig. 1 and Fig. 2, the present invention comprises: compressor intake pipe 1, compressor 2, engine intake pipe 3, engine 4, engine exhaust pipe 5, turbine 6, turbine exhaust pipe 7, connecting shaft 8, Volume cavity 9, volume cavity upper wall 10, volume cavity lower wall 11, volume cavity left wall 12, volume cavity right wall 13, volume cavity front wall 14, volume cavity rear wall 15, moving body 16, spring 17, heat exchanger 18. The first connecting pipe 19, the second connecting pipe 20, the third connecting pipe 21, the fourth connecting pipe 22, the fifth connecting pipe 23, the sixth connecting pipe 24 and the through pipe 25, the air inlet and outlet of the compressor 2 are respectively connected with The gas outlet of compressor air inlet pipe 1, the air inlet of engine inlet pipe 3 are connected, the air inlet and outlet of engine 4 are connected with the air outlet of engine inlet pipe 3, the air inlet of engine exhaust pipe 5 respectively, the air inlet of turbine 6 The air inlet and outlet are respectively connected with the air outlet of the engine exhaust pipe 5 and the air inlet of the turbine exhaust pipe 7, the compressor 2 is connected with the turbine 6 through the connecting shaft 8, the cross section of the volume chamber 9 is rectangular, and The wall surface 10, the lower wall surface 11 of the volume cavity, the left wall surface 12 of the volume cavity, the right wall surface 13 of the volume cavity, the front wall surface 14 of the volume cavity, and the rear wall surface 15 of the volume cavity are consolidated into one body, and the heat exchanger 18 is installed on the intake pipe 1 of the compressor, The two ends of the first connecting pipe 19 communicate with the engine intake pipe 3 and the upper wall surface 10 of the volume chamber respectively, and the two ends of the second connecting pipe 20 communicate with the turbine exhaust pipe 7 and one end of the third connecting pipe 21 respectively. The other end of the three connecting pipes 21 communicates with the upper wall surface 10 of the volume chamber, the two ends of the fourth connecting pipe 22 communicate with the lower wall surface 11 of the volume chamber and one end of the fifth connecting pipe 23 respectively, and the other end of the fifth connecting pipe 23 It communicates with the air inlet of the heat exchanger 18, and the air outlet of the heat exchanger 18 communicates with one end of the sixth connecting pipe 24. The moving body 16 is installed in the volume chamber 9 and is in sealing contact with the inner wall surface of the volume chamber 9, penetrating through The tube 25 runs through the upper and lower walls of the moving body 16, and the two ends of the spring 17 are respectively connected to the right wall of the moving body 16 and the right wall 13 of the volume chamber. The third connecting pipe 21, the fourth connecting pipe 22, and the through pipe 25 are all Straight circular pipes with the same inner diameter, the axis of the third connecting pipe 21 coincides with the axis of the fourth connecting pipe 22 , and the axis of the third connecting pipe 21 and the axis of the through pipe 25 are on the same plane.

In the present invention, when the engine 4 is in a low-speed working condition, the pressure in the engine intake pipe 3 is low, and the pressure in the volume cavity 9 on the left side of the moving body 16 is also low, and the moving body 16 moves to the left under the elastic action of the spring 17. Move, the third connecting pipe 21 communicates with the fourth connecting pipe 22 through the through pipe 25, a part of the exhaust gas in the turbine exhaust pipe 7 enters the heat exchanger 18 and then flows out through the sixth connecting pipe 24, thereby realizing the counter-compression gas The intake air in the air intake pipe 1 of the engine is heated to improve the cold start performance of the engine 4; High, the moving body 16 moves to the right and compresses the spring 17, so that the third connecting pipe 21 is separated from the fourth connecting pipe 22, all the exhaust gas of the engine 4 flows out from the turbine exhaust pipe 7, and the intake air at the inlet of the compressor 2 The temperature is lower, the intake air volume of the engine 4 is larger, and the overall performance is better.

Claims (2)

1. A pressure-controlled exhaust energy recovery system, comprising a compressor intake pipe (1), a compressor (2), an engine intake pipe (3), an engine (4), an engine exhaust pipe (5), a turbine ( 6), the turbine exhaust pipe (7) and the connecting shaft (8), the air inlet and outlet of the compressor (2) are respectively connected with the air outlet of the compressor air inlet pipe (1) and the air inlet of the engine air inlet pipe (3) , the air inlet and outlet of the engine (4) are respectively connected with the air outlet of the engine intake pipe (3) and the air inlet of the engine exhaust pipe (5), and the air inlet and outlet of the turbine (6) are respectively connected with the engine exhaust pipe (5) The air outlet of the turbine exhaust pipe (7) is connected to the air inlet, the compressor (2) is connected to the turbine (6) through the connecting shaft (8), and it is characterized in that it also includes a volume chamber (9), a volume chamber Upper wall surface (10), volume chamber lower wall surface (11), volume chamber left wall surface (12), volume chamber right wall surface (13), volume chamber front wall surface (14), volume chamber rear wall surface (15), moving body (16 ), spring (17), heat exchanger (18), first connecting pipe (19), second connecting pipe (20), third connecting pipe (21), fourth connecting pipe (22), fifth connecting pipe (23), the sixth connecting pipe (24) and the through pipe (25), the cross section of the volume chamber (9) is rectangular, the upper wall of the volume chamber (10), the lower wall of the volume chamber (11), the left wall of the volume chamber ( 12), the right wall of the volume cavity (13), the front wall of the volume cavity (14), and the rear wall of the volume cavity (15) are consolidated into one body, and the heat exchanger (18) is installed on the compressor inlet pipe (1). The two ends of the connecting pipe (19) are respectively connected with the engine intake pipe (3) and the upper wall surface of the volume chamber (10), and the two ends of the second connecting pipe (20) are respectively connected with the turbine exhaust pipe (7) and the third One end of the tube (21) is connected, the other end of the third connecting tube (21) is connected with the upper wall surface (10) of the volume cavity, and the two ends of the fourth connecting tube (22) are respectively connected with the lower wall surface (11) of the volume cavity, One end of the fifth connecting pipe (23) is connected, the other end of the fifth connecting pipe (23) is connected with the air inlet of the heat exchanger (18), and the air outlet of the heat exchanger (18) is connected with the sixth connecting pipe One end of (24) is connected, the moving body (16) is installed in the volume cavity (9) and is in sealing contact with the inner wall of the volume cavity (9), the through-pipe (25) runs through the upper and lower walls of the moving body (16), and the spring Both ends of (17) are respectively connected with the right wall of the moving body (16) and the right wall of the volume chamber (13). 2. The pressure-controlled exhaust energy recovery system according to claim 1, characterized in that the third connecting pipe (21), the fourth connecting pipe (22) and the through pipe (25) are all straight round pipes and The inner diameters are the same, the axis of the third connecting pipe (21) coincides with the axis of the fourth connecting pipe (22), and the axis of the third connecting pipe (21) and the axis of the through pipe (25) are on the same plane.

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