CN102588076A - Volume cavity regulating intake device - Google Patents

Abstract

A volume cavity regulating intake device in the technical field of internal-combustion engines comprises an air compressor, a turbine, an engine, a connecting pipe, a volume cavity, a movable plate and an elastic component. The cross section of the volume cavity is rectangular, two ends of the connecting pipe are connected with an intake pipe of the engine and the left wall surface of the volume cavity respectively, the movable plate mounted in the volume cavity hermetically contacts with the inner wall surface of the volume cavity, and the movable plate is connected with the right wall surface of the volume cavity through the elastic component. During operation of the engine, the movable plate is capable of moving left and right in the volume cavity. Under a low-speed working condition, the overall volume of a rear intake pipe of the air compressor is decreased, intake pressure is increased, and the charge efficiency of the engine is high. Under a high-speed working condition, the overall volume of the rear intake pipe of the air compressor is increased, the intake pressure is decreased, and the blasting pressure of the engine is reduced. The volume cavity regulating intake device is reasonable in design, simple in structure and applicable to turbocharging systems for engines.

Description

Volume cavity adjustable air intake device

technical field

The invention relates to an air intake system in the field of internal combustion engines, in particular to a volume chamber-adjustable air intake device for a supercharged engine.

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 high and low rotational speed 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 and low speed 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 adding a special set The 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 a volume cavity-adjustable air intake device, which can better take into account the high and low rotational 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, connecting pipe, volume cavity, volume The upper wall of the 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, the rear wall of the volume cavity, the moving plate and elastic parts, the compressor and the turbine are connected coaxially through the connecting shaft, and the inlet and outlet of the compressor The air ports are respectively connected with the air outlet of the compressor inlet pipe and the air inlet of the engine air intake 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 outlet pipe, and the air inlet and outlet of the engine are respectively It is connected with the air outlet of the engine intake pipe and the air inlet of the engine exhaust pipe. The two ends of the connecting pipe are respectively connected with the engine intake pipe and the left wall of the volume chamber. The cross section of the volume chamber is rectangular, and the upper wall of the volume chamber, 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 into one body. The moving plate is installed in the volume cavity and is in sealing contact with the inner wall of the volume cavity. The moving plate passes through the elastic component It is connected with the right wall of the volume chamber. The elastic part is a spring.

During the working process of the present invention, the moving plate can move left and right in the volume cavity. When the engine is in a high-speed working condition, the moving plate moves to the right and compresses the elastic part, and the total volume of the intake pipe from the compressor outlet to the engine inlet increases relatively, so that the intake pressure of the engine decreases relatively, and the explosion of the engine Pressure drop; when the engine is in a low-speed working condition, under the action of the elastic component, the moving plate moves to the left, and the total volume of the intake pipe from the compressor outlet to the engine inlet is relatively reduced, so that the engine intake pressure is relatively increased. Bigger, better combustion, lower fuel consumption.

Compared with the prior art, the present invention has the following beneficial effects: the present invention can make the engine burn better in low-speed working conditions, lower fuel consumption, lower explosion pressure in high-speed working conditions; and the temperature in the volume cavity is lower, The sealing problem between the moving plate and the volume chamber is also easy to solve.

Description of drawings

Fig. 1 is a structural schematic diagram of a volume chamber-adjustable air intake device 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. Connecting shaft, 5. Engine exhaust pipe, 6. Turbine, 7. Turbine outlet pipe, 8. Engine, 9. Connecting pipe , 10, volume cavity, 11, volume cavity upper wall, 12, volume cavity lower wall, 13, volume cavity left wall, 14, volume cavity right wall, 15, volume cavity front wall, 16, volume cavity rear wall, 17, Moving plate, 18, elastic component.

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, connecting shaft 4, engine exhaust pipe 5, turbine 6, turbine outlet pipe 7, engine 8, connecting Tube 9, volume cavity 10, volume cavity upper wall 11, volume cavity lower wall 12, volume cavity left wall 13, volume cavity right wall 14, volume cavity front wall 15, volume cavity rear wall 16, moving plate 17 and elastic member 18 , the compressor 2 is coaxially connected with the turbine 6 through the connecting shaft 4, the air inlet and outlet of the compressor 2 are respectively connected with the air outlet of the compressor inlet pipe 1 and the air inlet of the engine inlet pipe 3, and the inlet and outlet of the turbine 6 are connected with the air inlet of the engine inlet pipe 3 respectively. The air outlet of engine exhaust pipe 5 and the air inlet of turbine air outlet pipe 7 are connected, and the air inlet and outlet of engine 8 are connected with the air outlet of engine air inlet pipe 3 and the air inlet of engine exhaust pipe 5 respectively, connecting pipe 9 The two ends of the two ends are respectively connected with the engine intake pipe 3 and the left wall surface 13 of the volume chamber. , the front wall surface 15 of the volume cavity, and the rear wall surface 16 of the volume cavity are consolidated into one body, the moving plate 17 is installed in the volume cavity 10 and is in sealing contact with the inner wall surface of the volume cavity 10, and the moving plate 17 is in contact with the right wall surface 14 of the volume cavity through an elastic member 18 Connection, the elastic member 18 is a spring.

During the working process of the present invention, the moving plate 17 can move left and right in the volume cavity 10 . When the engine 8 was in a high-speed working condition, the moving plate 17 moved to the right and compressed the elastic member 18, and the total volume of the intake pipe from the outlet of the compressor 2 to the inlet of the engine 8 was relatively increased, so that the intake air of the engine 8 The pressure is relatively reduced, and the explosion pressure is reduced; when the engine 8 is in a low-speed working condition, under the action of the elastic member 18, the moving plate 17 moves to the left, and the intake pipe from the outlet of the compressor 2 to the inlet of the engine 8 is always The volume is relatively reduced, so that the intake pressure of the engine 8 is relatively increased, the combustion is better, and the fuel consumption is lower. Therefore, the present invention can better take into account the high and low rotational speed working conditions of the engine.

Claims (2)

1. A volume chamber adjustable air intake device, comprising a compressor intake pipe (1), a compressor (2), an engine intake pipe (3), a connecting shaft (4), an engine exhaust pipe (5), a turbine ( 6), the turbine outlet pipe (7) and the engine (8), the compressor (2) and the turbine (6) are coaxially connected through the connecting shaft (4), and the air inlet and outlet of the compressor (2) are respectively connected with the compressor inlet pipe ( The air outlet of 1) is connected with the air inlet of the engine intake pipe (3), and the air inlet and outlet of the turbine (6) are respectively connected with the air outlet of the engine exhaust pipe (5) and the air inlet of the turbine outlet pipe (7). Connect, the air inlet and outlet of engine (8) are respectively connected with the air outlet of engine intake pipe (3), the air inlet of engine exhaust pipe (5), it is characterized in that also comprising connecting pipe (9), volume chamber (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 plate (17) and the elastic member (18), the two ends of the connecting pipe (9) are connected with the engine intake pipe (3) and the left wall surface (13) of the volume chamber respectively, and the cross section of the volume chamber (10) is rectangular, The upper wall of the volume chamber (11), the lower wall of the volume chamber (12), the left wall of the volume chamber (13), the right wall of the volume chamber (14), the front wall of the volume chamber (15), and the rear wall of the volume chamber (16) are consolidated into In one piece, the moving plate (17) is installed in the volume cavity (10) and is in sealing contact with the inner wall of the volume cavity (10), and the moving plate (17) is connected with the right wall surface (14) of the volume cavity through an elastic member (18). 2. The volume cavity adjustable air intake device according to claim 1, characterized in that the elastic member (18) is a spring.

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