CN102817703A - Adjustment system with post-pressure of air compressor as control pressure - Google Patents

Abstract

An adjustment system for controlling the pressure after the compressor in the technical field of internal combustion engines, comprising: a compressor, a turbine, an engine, a connecting pipe, a volume chamber, a moving body, a through pipe and an elastic component, and the two ends of the first connecting pipe are respectively connected to the The exhaust pipe of the engine communicates with the upper wall of the volume chamber, the two ends of the third connecting pipe communicate with the right wall of the volume chamber and the engine intake pipe respectively, and the through pipe runs through the upper and lower walls of the moving body. During the working process of the engine, the moving body can move left and right in the volume cavity; in low-speed working conditions, the pressure on the right side of the moving body is low, and the moving body moves to the right, the first connecting pipe and the second connecting pipe cannot be connected, and the engine enters The air volume is relatively increased, and the power is increased; in high-speed working conditions, the pressure on the right side of the moving body is high, and the moving body moves to the left, the first connecting pipe and the second connecting pipe are connected, the air intake of the engine is relatively reduced, each cylinder The burst pressure is reduced. The invention has reasonable design and simple structure, and is suitable for the turbocharging system of the engine.

Description

Post-compressor pressure as regulating system for control pressure

technical field

The invention relates to an exhaust system in the field of internal combustion engines, in particular to an adjustment system in which the post pressure of a supercharged engine compressor is used as the control pressure.

Background technique

With the development of modern society, people have higher and higher requirements on the power and economy of the engine. In the case of a certain displacement, the most effective way to increase the output power of the engine is to provide more fuel for combustion. It is easy to provide more fuel to the cylinder through the injector, but it is not so easy to provide the amount of air to match the increased amount of fuel at the same time; The effect is poor. When the fuel injection volume is constant and the cylinder air intake volume is large, the combustion is better, and the fuel consumption and emissions are lower. The traditional naturally aspirated engine completely relies on the vacuum formed in the cylinder to inhale air when the piston moves down. This traditional method is difficult to provide a sufficient amount of air to support the complete combustion of fuel. Therefore, in order to provide enough air for the combustion of the engine to make the engine more dynamic and economical, turbocharging technology plays a very important role. However, the existing turbocharging systems cannot take into account the low-speed working conditions and high-speed working conditions of the engine well.

After searching the existing technical literature, it was found that Chinese patent number ZL200410050996.3, patent name: a variable modular pulse conversion supercharging device for a turbocharged diesel engine, the patented technology provides an exhaust device in the exhaust pipe The device with continuously variable volume can better take into account the high-speed and low-speed working conditions of the engine; but the change of the exhaust volume in the exhaust pipe is realized by moving the moving rod up and down, which requires an additional A special control mechanism is used to control the movement of the moving rod, so that the structure of the booster system becomes more complicated, and the sealing of the exhaust pipe system is also poor under high temperature conditions.

Contents of the invention

The present invention aims at the deficiencies of the above-mentioned prior art, and provides an adjustment system that uses the post-compressor pressure as the control pressure, which can better take into account the high-speed and low-speed working conditions of the engine.

The present invention is achieved through the following technical proposals, the present invention comprises: compressor intake pipe, compressor, engine intake pipe, connecting shaft, engine exhaust pipe, turbine, turbine outlet pipe, engine, first connecting pipe, second connecting pipe, third connecting pipe, volume chamber, volume chamber upper wall, volume chamber lower wall, volume chamber left wall, volume chamber right wall, volume chamber front wall, volume chamber rear wall, moving body, through pipe and elastic parts, The compressor and the turbine are connected coaxially through the connecting shaft, the air inlet and outlet of the compressor are respectively connected with the air outlet of the compressor intake pipe and the air inlet of the engine intake pipe, and the air inlet and outlet of the turbine are respectively connected with the air outlet of the engine exhaust pipe, The air inlet of the turbine outlet pipe is connected, and the air inlet and outlet of the engine are respectively connected with the air outlet of the engine air inlet pipe and the air inlet of the engine exhaust pipe. The wall surface, the left wall surface of the volume cavity, the right wall surface of the volume cavity, the front wall surface of the volume cavity, and the rear wall surface of the volume cavity are consolidated into one body, and the moving body is installed in the volume cavity and is in sealing contact with the inner wall surface of the volume cavity. They are respectively connected with the engine exhaust pipe and the upper wall of the volume chamber. One end of the second connecting pipe is connected with the lower wall of the volume chamber. The wall surface and the engine intake pipe are connected, the through pipe runs through the upper and lower walls of the mobile body, and the right wall surface of the mobile body is connected with the right wall surface of the volume cavity through elastic components.

Further, in the present invention, the elastic component is a spring, the first connecting pipe, the second connecting pipe, and the through pipe are all straight round pipes with the same inner diameter, the axis of the first connecting pipe coincides with the axis of the second connecting pipe, and the second connecting pipe The axis of a connecting pipe is on the same plane as the axis of the through pipe.

During the working process of the present invention, the moving body can move left and right in the volume cavity, and one end of the second connecting pipe is vented to the atmosphere. In low-speed working conditions, the pressure in the volume cavity on the right side of the moving body is low, and under the action of the elastic component, the moving body moves to the right, the first connecting pipe and the second connecting pipe cannot be connected, and all the exhaust gas behind the engine flows into Turbine, the working ability of the turbine is enhanced, so that the air intake of the engine is relatively increased, and the power is increased; under high-speed conditions, the pressure in the volume cavity on the right side of the moving body is relatively high, and the moving body moves to the left and stretches the elastic components. The first connecting pipe is connected with the second connecting pipe, and part of the exhaust gas behind the engine flows into the atmosphere, and the working ability of the turbine is weakened, so that the intake air volume of the engine is relatively reduced, and the explosion pressure of each cylinder is reduced.

Compared with the prior art, the present invention has the following beneficial effects: the present invention can make the intake air flow of the engine relatively increase when the engine is operating at a low speed, and the power is increased; The pressure drops; and the temperature in the volume cavity is low, and the sealing problem between the moving plate and the volume cavity is also easy to solve.

Description of drawings

Fig. 1 is the structural representation of the regulating system of pressure after compressor of the present invention as control pressure;

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. Connecting shaft, 5. Engine exhaust pipe, 6. Turbine, 7. Turbine outlet pipe, 8. Engine, 9. First Connecting pipe, 10, the second connecting pipe, 11, the third connecting pipe, 12, the volume chamber, 13, the upper wall of the volume chamber, 14, the lower wall of the volume chamber, 15, the left wall of the volume chamber, 16, the right wall of the volume chamber, 17. The front wall of the volume chamber, 18. The rear wall of the volume chamber, 19. The moving body, 20. The through pipe, 21. The elastic part.

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: comprise compressor inlet pipe 1, compressor 2, engine inlet pipe 3, connecting shaft 4, engine exhaust pipe 5, turbine 6, turbine outlet pipe 7, engine 8, First connecting pipe 9, second connecting pipe 10, third connecting pipe 11, volume chamber 12, volume chamber upper wall 13, volume chamber lower wall 14, volume chamber left wall 15, volume chamber right wall 16, volume chamber front wall 17. The rear wall of the volume chamber 18, the moving body 19, the through pipe 20 and the elastic member 21. The compressor 2 and the turbine 6 are connected coaxially through the connecting shaft 4. The air inlet and outlet of the compressor 2 are respectively connected to the air outlet of the compressor inlet pipe 1 , the air inlet of engine intake pipe 3 is connected, the air inlet and outlet of turbine 6 are connected with the air outlet of engine exhaust pipe 5 and the air inlet of turbine outlet pipe 7 respectively, and the air inlet and outlet of engine 8 are respectively connected with engine inlet pipe 3 The air outlet of the engine exhaust pipe 5 is connected to the air inlet, the cross section of the volume chamber 12 is a rectangle, the volume chamber upper wall 13, the volume chamber lower wall 14, the volume chamber left wall 15, the volume chamber right wall 16, the volume The front wall surface 17 of the chamber and the rear wall surface 18 of the volume chamber are consolidated into one body. The moving body 19 is installed in the volume chamber 12 and is in sealing contact with the inner wall surface of the volume chamber 12. The two ends of the first connecting pipe 9 are respectively connected to the engine exhaust pipe 5 1. The upper wall surface 13 of the volume chamber is connected, one end of the second connecting pipe 10 is connected with the lower wall surface 14 of the volume chamber, the other end of the second connecting pipe 10 is connected to the atmosphere, and the two ends of the third connecting pipe 11 are connected with the right wall surface of the volume chamber respectively. 16. The engine intake pipe 3 is connected, and the through pipe 20 runs through the upper and lower walls of the mobile body 19. The right wall of the mobile body 19 is connected with the right wall surface 16 of the volume cavity through the elastic part 21. The elastic part 21 is a spring. The first connecting pipe 9. The second connecting pipe 10 and the through pipe 20 are both straight round pipes with the same inner diameter. The axis of the first connecting pipe 9 coincides with the axis of the second connecting pipe 10 . on the same plane.

During the working process of the present invention, the moving body 19 can move left and right in the volume cavity 12, and one end of the second connecting pipe 10 is open to the atmosphere. In low-speed working conditions, the pressure in the volume chamber on the right side of the moving body 12 is relatively low. Under the action of the elastic member 21, the moving body 12 moves to the right, and the first connecting pipe 9 and the second connecting pipe 10 cannot communicate with each other. All the exhaust gas flows into the turbine 6, and the working ability of the turbine 6 is enhanced, so that the intake air volume of the engine 8 is relatively increased, and the power is increased; 12 moves to the left and stretches the elastic member 21, the first connecting pipe 9 and the second connecting pipe 10 are connected, part of the exhaust gas behind the engine flows into the atmosphere, and the working ability of the turbine 6 is weakened, so that the air intake of the engine 8 Relatively reduced, the explosion pressure of each cylinder is reduced. Therefore, the present invention can better take into account both the low-speed working condition and the high-speed working condition of the engine.

Claims (2)

1. Behind the gas compressor pressure as the regulating system of pilot pressure; Comprise compressor air inlet machine pipe (1), gas compressor (2), engine air inlet tube (3), coupling shaft (4), engine exhaust pipe (5), turbine (6), turbine steam outlet pipe (7) and motor (8); Gas compressor (2) and turbine (6) are through coaxial linking to each other of coupling shaft (4); The air inlet/outlet of gas compressor (2) is connected with the air outlet of compressor air inlet machine pipe (1), the suction port of engine air inlet tube (3) respectively; The air inlet/outlet of turbine (6) is connected with the air outlet of engine exhaust pipe (5), the suction port of turbine steam outlet pipe (7) respectively; The air inlet/outlet of motor (8) is connected with the air outlet of engine air inlet tube (3), the suction port of engine exhaust pipe (5) respectively; It is characterized in that also comprising first connecting tube (9), second connecting tube (10), the 3rd connecting tube (11), cavity volume (12), cavity volume upper wall surface (13), cavity volume lower wall surface (14), cavity volume left side wall (15), cavity volume right wall (16), cavity volume front face (17), cavity volume rear surface (18), moving body (19), run through pipe (20) and elastic member (21); The cross section of cavity volume (12) is a rectangular; Cavity volume upper wall surface (13), cavity volume lower wall surface (14), cavity volume left side wall (15), cavity volume right wall (16), cavity volume front face (17), cavity volume rear surface (18) is fixed is one; Moving body (19) is installed in the cavity volume (12) and with the internal face sealing of cavity volume (12) and contacts; The two ends of first connecting tube (9) are connected with engine exhaust pipe (5), cavity volume upper wall surface (13) respectively; One end of second connecting tube (10) is connected with cavity volume lower wall surface (14); The other end of second connecting tube (10) leads to atmosphere; The two ends of the 3rd connecting tube (11) are connected with the right wall (16) of cavity volume, engine air inlet tube (3) respectively, run through two walls up and down that pipe (20) runs through moving body (19), and the right wall of moving body (19) is connected with the right wall of cavity volume (16) through elastic member (21).
2. 2. pressure is as the regulating system of pilot pressure behind the gas compressor according to claim 1; It is characterized in that said elastic member (21) is a spring; Said first connecting tube (9), second connecting tube (10), run through that pipe (20) is straight pipe and internal diameter is identical; The dead in line of the axis of first connecting tube (9) and second connecting tube (10), the axis of first connecting tube (9) and the axis that runs through pipe (20) are at grade.

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