CN201763438U - Turbo charging device with variable outlet area of an exhaust pipe - Google Patents

Abstract

A turbocharging device with a variable exhaust pipe outlet area belongs to the technical field of internal combustion engines, including a turbine, an exhaust branch pipe, an exhaust pipe, a baffle, a baffle shaft, and a baffle rotating handle. The circular baffle is placed on the exhaust pipe It is installed in the pipe at the outlet of the exhaust pipe concentrically; the baffle shaft and the baffle are fixed as a whole, one end of which is fixedly connected with the rotating handle of the baffle, and the other end passes through the pipe wall directly above the exhaust pipe, and then passes through the The shaft hole of the baffle vertically penetrates into the pipe wall groove of the exhaust pipe and is in smooth and close contact with the pipe wall of the exhaust pipe. The rotating baffle enables different outlet areas to be obtained under different working conditions to meet the requirements of economy and power. When running at low speed, the outlet area of the exhaust pipe becomes smaller; when running at high speed, the outlet area of the exhaust pipe becomes larger. The utility model has a reasonable design, meets the operation requirements of the engine under variable working conditions, is not limited by the number of cylinders, and is suitable for a turbocharger device with a single turbine inlet and a side-mounted turbine.

Description

Turbocharger with variable exhaust pipe exit area

technical field

The invention relates to a turbocharging device for an internal combustion engine, in particular to a turbocharging device with a single turbine inlet and a variable outlet area of an exhaust pipe placed on the side of the turbine, and belongs to the technical field of internal combustion engines.

Background technique

With the development of society and the improvement of environmental protection requirements, engine boosting technology is now more and more widely used. Most of the engines with medium and high power adopt turbocharging technology to improve power and reduce fuel consumption. The two basic supercharging systems for turbocharged engines are constant pressure supercharging system and pulse supercharging system. Constant pressure supercharging system, the volume of the exhaust pipe is large, the pressure in the pipe is basically kept constant, the scavenging interference is small, the pump air loss is small, and the performance is good at high speed; the pulse supercharging system, the volume of the exhaust pipe is small, which can avoid scavenging Interference, and better use of exhaust pulse energy, low-speed conditions and acceleration loading performance is good. The ideal situation is that the volume of the exhaust pipe can be reduced when the engine is running at low speed and under accelerated loading conditions, and the pulse boosting method can be realized to make full use of the pulse energy; when the engine is running at high speed, the volume of the exhaust pipe can be increased to realize The constant pressure boost mode reduces the pump air loss. It can be seen that if an engine is equipped with constant pressure supercharging method and pulse supercharging method at the same time, the constant pressure supercharging system is used for high-speed working conditions, and the pulse supercharging system is used for low-speed and transient working conditions, which is more ideal. Yes, but the volume of the exhaust pipe of the existing engine supercharging system basically cannot be adjusted.

Utility model content

In order to overcome the deficiencies of the prior art, the utility model provides a turbocharging device with a variable outlet area of an exhaust pipe. The outlet area of the exhaust pipe changes with the operating conditions of the engine. The outlet area of the exhaust pipe becomes smaller under low-speed operating conditions, and becomes larger under high-speed operating conditions, so that the various operating conditions of the engine It can obtain better performance and meet the requirements of economy and power at the same time.

In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: the device includes a turbine, an exhaust branch pipe, an exhaust pipe, a baffle plate, a baffle plate shaft, and a baffle plate rotating handle, the turbine is a single-inlet turbine, and the inlet of the exhaust branch pipe It is connected with the exhaust port of the cylinder head, the outlet of the exhaust branch pipe is connected with the exhaust pipe, the exhaust pipe is a round pipe, and its outlet is connected with the inlet of the turbine, and the baffle is a circular plate, placed at the outlet of the exhaust pipe In the pipe at the place, its diameter is smaller than the inner diameter of the exhaust pipe, the baffle and the exhaust pipe are installed concentrically; The other end passes through the pipe wall directly above the exhaust pipe, passes through the shaft hole of the baffle plate, and then vertically penetrates into the pipe wall groove directly below the exhaust pipe and is in smooth and close contact with the pipe wall of the exhaust pipe. In the present utility model, the round pipe type exhaust pipe can ensure better flow performance of the exhaust gas. The rotation of the baffle is realized by the rotation of the baffle rotating handle, thereby adjusting the outlet area of the exhaust pipe. When the engine is running at low speed, the rotating baffle makes the windward side larger, so that the outlet area of the exhaust pipe becomes smaller. When the outlet area of the exhaust pipe becomes smaller, the pumping loss increases, the available energy before the turbine also increases, the intake air flow becomes larger, the combustion in the cylinder becomes better, and the fuel consumption decreases. When the engine is running at high speed, the rotating baffle makes the windward side smaller, so that the outlet area of the exhaust pipe becomes larger. When the outlet area of the exhaust pipe becomes larger, the pumping loss decreases and the fuel consumption decreases.

Beneficial effects of the utility model: the device is not limited by the number of cylinders, meets the requirements of the engine under variable working conditions, and is suitable for a turbocharger device with a single turbine inlet and a side-mounted turbine. The engine can make the combustion variable in the entire load operating range Well, lower fuel consumption and better performance.

Description of drawings

Fig. 1 is the structural representation of the utility model turbocharging device;

Fig. 2 is a schematic structural diagram of section A-A in Fig. 1 .

Detailed ways

The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, the utility model includes a turbine 1, an exhaust branch pipe 2, an exhaust pipe 3, a baffle 4, a baffle shaft 5, and a baffle rotating handle 6. The turbine 1 is a single-inlet turbine, and the exhaust The inlet of the branch pipe 2 is connected to the exhaust port of the cylinder head, the outlet of the exhaust branch pipe 2 is connected to the exhaust pipe 3, the exhaust pipe 3 is a round pipe, and its outlet is connected to the inlet of the turbine 1, and the baffle 4 is a round pipe. Plate, placed in the pipeline at the outlet of the exhaust pipe 3, its diameter is smaller than the inner diameter of the exhaust pipe 3, the baffle plate 4 is concentrically installed with the exhaust pipe 3; the baffle plate shaft 5 and the baffle plate 4 are solidly integrated, and the baffle plate shaft One end of 5 and the rotating handle 6 of the baffle are fixed as one, and the other end of the baffle shaft 5 passes through the pipe wall directly above the exhaust pipe 3, passes through the shaft hole of the baffle 4, and then vertically penetrates into the exhaust pipe 3 In the pipe wall groove directly below and in smooth and close contact with the pipe wall of the exhaust pipe 3. In the present invention, the circular tube type exhaust pipe 3 can ensure better flow performance of the exhaust gas. The rotation of the baffle plate 4 is realized by the rotation of the baffle plate rotating handle 6 , thereby adjusting the outlet area of the exhaust pipe 3 . When the engine was running at a low speed, the rotating baffle 4 made its windward surface larger, so that the outlet area of the exhaust pipe 3 became smaller. When the outlet area of the exhaust pipe 3 becomes smaller, the pumping loss increases, the available energy before the turbine also increases, the intake air flow becomes larger, the combustion in the cylinder becomes better, and the fuel consumption decreases. When the engine was running at a high speed, the rotating baffle 4 made its windward surface smaller, so that the outlet area of the exhaust pipe 3 became larger. When the outlet area of the exhaust pipe 3 becomes larger, the pumping loss decreases and the fuel consumption decreases.

Claims (1)

1. the turbo charging installation of an exhaust outlet variable area, comprise turbine (1), exhaust branch pipe (2), outlet pipe (3), turbine (1) is single import turbine, the import of exhaust branch pipe (2) is connected with the cylinder head air outlet flue, the outlet of exhaust branch pipe (2) is connected with outlet pipe (3), outlet pipe (3) is a pipe, its outlet is connected with the import of turbine (1), it is characterized in that also comprising baffle plate (4), damper shaft (5), baffle plate rotating handles (6), baffle plate (4) is a plectane, place in the pipeline in outlet pipe (3) outlet port, its diameter is less than outlet pipe (3) internal diameter, baffle plate (4) and the concentric installation of outlet pipe (3); Damper shaft (5) is solidified as a whole with baffle plate (4), one end of damper shaft (5) and baffle plate rotating handles (6) are solidified as a whole, after the tube wall break-through of the other end of damper shaft (5) directly over the outlet pipe (3), pass the axis hole of baffle plate (4), vertically pierce into again in the tube wall groove under the outlet pipe (3) and with smooth tight contact of tube wall of outlet pipe (3).

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