CN104712436A - Sliding type rotary adjustment system - Google Patents

Abstract

A sliding rotary adjustment system belonging to the technical field of internal combustion engines, including an engine intake pipe, an engine, an engine exhaust pipe, guide vanes, a rotating shaft, a push-pull rod, a moving body, a spring, a sliding body, connecting pipes, and arrangement of guide vanes In the air intake branch pipe and solidified with the rotating shaft, the left wall of the sliding body is connected with the left wall of the control body through the second spring, one end of the connecting pipe communicates with the inner cavity of the control body, and the other end of the connecting pipe It communicates with the engine exhaust pipe between the engine and the catalyst package. In the present invention, the intake tumble flow is relatively large when the engine is running at a low speed, and the pumping loss is relatively small when the engine is running at a high speed. The invention has reasonable design and simple structure, and is suitable for the optimized design of the air intake system of the naturally aspirated internal combustion engine.

Description

Sliding Rotary Adjustment System

technical field

The invention belongs to the technical field of internal combustion engines, and in particular relates to a sliding rotary adjustment system capable of realizing the self-regulation of the air intake system of a naturally aspirated engine.

Background technique

At the beginning of the 20th century, British B. Hopkinson found in the internal combustion engine test that when the air in the cylinder is disturbed, the combustion process can be accelerated Effect, the use of tumble flow to increase the turbulence intensity in the combustion chamber and the use of lean mixture combustion mode, etc., have become the focus of research on spark ignition engines. The air movement in the engine cylinder is transient and complex. From the point of view of the overall movement of the gas macroscopically, it generally appears as an oblique axis vortex. At this time, the vortex and tumble can be regarded as two independent components of the oblique axis vortex. Experiments have found that tumble flow can also increase the turbulence intensity of the air movement in the combustion chamber at the end of compression. Increasing the turbulence intensity can accelerate the flame propagation rate, shorten the combustion duration, and increase the heat release rate, thereby improving the combustion process and improving the power of the engine. The tumble flow mode is superior to the vortex flow, because the formation of the tumble flow depends on the movement of the cylinder wall and the piston, and a large kinetic energy can be preserved during the intake process, and a part of the kinetic energy in the compression process breaks the large-scale air movement into many small-scale micro-vortices , which increases the turbulence intensity in the cylinder, while the vortex generally undergoes a process of continuous attenuation. Generally speaking, the reason why the gasoline engine adopts tumble flow is because the gasoline engine rotates at a higher speed, which leads to the completion of each combustion stroke in a shorter time, and the tumble flow can ensure a large turbulent kinetic energy in the late stage of compression. The increase of the flame propagation rate does not shorten the combustion duration; secondly, due to the limitation of the structure, the available space of the gasoline engine is small, while the space occupied by the swirl air passage is relatively large.

After searching the existing literature, it is found that the patent application number is 20121041673.5, and the name is a patented technology of a variable intake tumble adjustment mechanism for a gasoline engine. It provides a technology that uses an electric actuator to adjust the intake tumble, but it Self-regulation of intake tumble cannot be realized.

Contents of the invention

The present invention aims at the above-mentioned deficiencies, and provides a sliding rotary adjustment system, which can realize the self-regulation of the tumble flow of the intake air.

The present invention is achieved through the following technical proposals, the present invention comprises engine intake pipe, air filter, throttle valve, intake main pipe, intake pipe, engine, engine exhaust pipe, catalytic package, muffler, vane plate, rotating Shaft, push-pull rod, control body, first spring, moving body, second spring, sliding body, connecting pipe, the air outlet of the engine intake pipe is connected with the air inlet of the intake manifold, and the air outlet of the intake manifold is connected with the intake The air intake of the air branch pipe is connected, the air outlet of the intake branch pipe is connected with the intake port of the engine, the air filter and the throttle valve are connected with the engine intake pipe in sequence, and the air outlet of the engine exhaust pipe is connected with the exhaust port of the engine. The catalytic package and the muffler are sequentially arranged on the engine exhaust pipe, the rotating shaft is inlaid on the upper wall of the intake branch pipe, the guide vane is arranged in the intake branch pipe and consolidated with the rotating shaft, and the inside of the control body The cross section of the cavity is rectangular, the moving body and the sliding body are arranged in the control body and are in sealing contact with the inner wall of the control body, the longitudinal sections of the moving body and the sliding body are trapezoidal structures and are in sealing contact with each other, one end of the push-pull rod is in contact with the guide The vanes are hinged together, the other end of the push-pull rod passes through the lower wall of the control body and is hinged with the moving body, the lower wall of the moving body is connected with the lower wall of the control body through the first spring, and the left wall of the sliding body passes through The second spring is connected with the left wall of the control body, one end of the connecting pipe communicates with the inner cavity of the control body, and the other end of the connecting pipe communicates with the engine exhaust pipe between the engine and the catalytic package.

The beneficial effects of the invention are: the invention has reasonable design and simple structure, and can realize the self-regulation of the tumble flow of the intake air.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Figure 2 is a partially enlarged view of Figure 1;

Fig. 3 is the structural representation of A-A section among Fig. 1;

Fig. 4 is the sectional view of control body among the present invention;

The labels in the accompanying drawings are: 1. Engine intake pipe, 2. Air filter, 3. Throttle valve, 4. Air intake manifold, 5. Intake branch pipe, 6. Engine, 7. Engine exhaust pipe, 8. Catalyst Package, 9, muffler, 10, guide vane plate, 11, rotating shaft, 12, push-pull rod, 13, control body, 14, first spring, 15, moving body, 16, second spring, 17, sliding body, 18. Connecting 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

Embodiments of the present invention are as shown in Fig. 1 to Fig. 4, and the present invention comprises engine intake pipe 1, air filter 2, throttle valve 3, intake main pipe 4, intake branch pipe 5, engine 6, engine exhaust pipe 7, catalytic package 8. Muffler 9, guide vane plate 10, rotating shaft 11, push-pull rod 12, control body 13, first spring 14, moving body 15, second spring 16, sliding body 17, connecting pipe 18, engine intake pipe 1 The air outlet is connected with the air inlet of the intake main pipe 4, the air outlet of the air intake main pipe 4 is connected with the air inlet of the air intake branch pipe 5, and the air outlet of the air intake branch pipe 5 is connected with the air intake of the engine 6, The air filter 2 and the throttle valve 3 are sequentially connected to the engine intake pipe 1, the air outlet of the engine exhaust pipe 7 is connected to the exhaust passage of the engine 6, and the catalytic package 8 and the muffler 9 are sequentially arranged on the engine exhaust pipe 7 , the rotating shaft 11 is inlaid on the upper wall of the intake branch pipe 5, the vane plate 10 is arranged in the intake branch pipe 5 and is consolidated with the rotating shaft 11, the internal cavity of the control body 13 has a rectangular cross section, and the moving body 15 , sliding body 17 are all arranged in the control body 13 and are in sealing contact with the inner wall surface of the control body 13, the longitudinal sections of the moving body 15 and sliding body 17 are trapezoidal structures and are in sealing contact with each other, one end of the push-pull rod 12 is in contact with the guide vane 10 are hinged together, and the other end of push-pull rod 12 passes through the lower wall surface of control body 13 and is hinged together with moving body 15, and the lower wall surface of moving body 15 is connected with the lower wall surface of control body 13 by first spring 14, slides The left wall of body 17 is connected with the left wall of control body 13 by second spring 16, and one end of connecting pipe 18 communicates with control body 13 inner cavities, and the other end of connecting pipe 18 is connected between engine 6 and catalytic package 8. The engine exhaust pipe 7 between the engines communicates.

During the implementation of the present invention, the guide vane 10 and the rotating shaft 11 are consolidated together, the push-pull rod 12 is hinged with the guide vane 10 and the moving body 15, and the push-pull rod 12 can pull the guide vane 10 to rotate. In high-speed working conditions, when the exhaust pressure in the engine exhaust pipe 7 between the engine 6 and the catalytic package 8 is relatively high, the sliding body 17 moves to the left and compresses the second spring 16. Under the action, it moves upward, so that the push-pull rod 12 drives the vane plate 10 to rotate counterclockwise, the shrinkage area of the intake branch pipe 5 becomes larger, and the pumping loss is small; When the exhaust pressure in the engine exhaust pipe 7 is small, the sliding body 17 moves to the right under the elastic action of the second spring 16, and the moving body 15 moves downward and compresses the first spring 14, so that the push-pull rod 12 drives the guide vane When the plate 10 rotates clockwise, the necking area of the intake branch pipe 5 becomes smaller, the tumble flow of the intake air is larger, the combustion in the engine cylinder is better, and the fuel consumption is lower.

Claims (1)

1. a sliding-type rotary regulating system, comprise engine air inlet tube (1), air filter (2), closure (3), intake manifold (4), air intake branch (5), motor (6), engine exhaust pipe (7), catalysis bag (8), baffler (9), the air outlet of engine air inlet tube (1) is connected with the suction port of intake manifold (4), the air outlet of intake manifold (4) is connected with the suction port of air intake branch (5), the air outlet of air intake branch (5) is connected with the intake duct of motor (6), air filter (2), closure (3) is connected in turn on engine air inlet tube (1), the air outlet of engine exhaust pipe (7) is connected with the air outlet flue of motor (6), catalysis bag (8), baffler (9) is arranged on engine exhaust pipe (7) successively, it is characterized in that, also comprise guide-leaf plate (10), running shaft (11), pull bar (12), control volume (13), first spring (14), moving body (15), second spring (16), slide mass (17), connecting tube (18), running shaft (11) is embedded on the upper wall surface of air intake branch (5), guide-leaf plate (10) to be arranged in air intake branch (5) and to be consolidated with running shaft (11), control volume (13) internal cavity cross section is rectangular, moving body (15), slide mass (17) to be arranged in control volume (13) and to seal with the internal face of control volume (13) and contacts, moving body (15), the longitudinal section of slide mass (17) is trapezium structure and mutually seals contact, one end and the guide-leaf plate (10) of pull bar (12) are hinged, the other end of pull bar (12) is through hinged with moving body (15) after the lower wall surface of control volume (13), the lower wall surface of moving body (15) is connected by the lower wall surface of the first spring (14) with control volume (13), the left wall of slide mass (17) is connected by the left wall of the second spring (16) with control volume (13), one end of connecting tube (18) is connected with control volume (13) internal cavity, the other end of connecting tube (18) and motor (6), engine exhaust pipe (7) between motor between catalysis bag (8) is connected.