CN105649785A - Rotary type tumble ratio regulating system - Google Patents

Abstract

A rotary tumble ratio adjustment system in the technical field of mechanical design, including a control body, a centrifugal shaft, a centrifugal chamber, a centrifugal body, a centrifugal spring, an arc plate, an elastic band, a rotating shaft, a rotating plate, a centrifugal chamber, a centrifugal body, and a centrifugal Springs, arc plates, and elastic bands are arranged in the control body. One end of the centrifugal body is arranged in the centrifugal chamber and connected to the centrifugal shaft through a centrifugal spring. The other end of the centrifugal body is an arc structure. The plates are in sealing contact, and the elastic band is arranged on the outer surface of the arc plate. When the engine speed is high, the rotary plate rotates clockwise, the intake branch pipe shrinks larger, and the pump air loss is smaller; when the engine speed is low, the rotary plate rotates counterclockwise, the intake branch pipe shrinks smaller, and the tumble flow Ratio becomes larger. The invention has reasonable design and simple structure, and is suitable for optimal design of a variable tumble ratio system.

Description

Rotary tumble ratio adjustment system

technical field

The invention relates to a rotary tumble ratio adjustment system in the technical field of mechanical design, in particular to a rotary tumble ratio adjustment system suitable for an intake tumble ratio variable mechanism.

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. In general, 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 greater turbulent kinetic energy in the late stage of compression. The increase of the flame propagation rate does not shorten the combustion duration; the second is that due to structural limitations, the available space of the gasoline engine is small, while the swirl air passage takes up a large space.

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 achieved.

Contents of the invention

The present invention aims at the shortcomings of the above-mentioned prior art, and provides a rotary tumble ratio adjustment system, which can make the engine intake tumble ratio self-regulate according to the engine speed.

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 branch pipe, engine, engine exhaust pipe, catalytic package, muffler, rotating shaft, control body , stretching shaft, stretching rod, centrifugal shaft, centrifugal cavity, centrifugal body, centrifugal spring, circular arc plate, elastic band, rotating plate, rotating rod, the air outlet of the engine intake pipe is connected with the air inlet of the intake manifold, The air outlet of the intake main pipe is connected to the air inlet of the intake branch pipe, the air outlet of the intake branch pipe is connected to the intake port of the engine, the air filter and the throttle valve are connected to the engine intake pipe in turn, and the engine exhaust pipe The air outlet is connected to the exhaust port of the engine, the catalytic package and the muffler are sequentially arranged on the engine exhaust pipe, the rotating shaft is embedded on the lower wall of the intake branch pipe, and the rotating plate is arranged in the intake branch pipe and fixed with the rotating shaft. Knotted together, the extended end of the rotating shaft is fixed with one end of the rotating rod, the other end of the rotating rod is hinged with one end of the stretching rod, and the other end of the stretching rod is fixed with one end of the stretching shaft Together, the other end of the stretching shaft is solidified with the upper arc plate inside the control body, and one end of the centrifugal shaft passes through the center of the front wall of the control body and is embedded on the rear wall of the control body. The centrifugal cavity, centrifugal body, Centrifugal springs, circular arc plates and elastic bands are all arranged in the control body, the centrifugal chamber and the centrifugal shaft are consolidated together, one end of the centrifugal body is arranged in the centrifugal chamber and connected with the centrifugal shaft through the centrifugal spring, the other end of the centrifugal body is a circle Arc structure, the other end of the centrifugal body is in sealing contact with the arc plate, the elastic band is arranged on the outer surface of the arc plate, and the other end of the centrifugal shaft is connected with the crankshaft of the engine through a chain.

Further, in the present invention, the cross section of the inner cavity of the control body is circular, and the centrifugal chamber and the arc plates are arranged in an array in the control body, the number of the arc plates is greater than or equal to the number of the centrifugal chamber, and the circle The width of the gap between the arc plates is smaller than the cross-sectional width of the centrifugal body, and the elastic band has an elastic steel wire structure inside.

Compared with the prior art, the present invention has the following beneficial effects: the present invention is reasonable in design and simple in structure; the intake tumble ratio can be continuously adjusted according to the engine speed, thus taking into account various operating conditions of the engine.

Description of drawings

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

Fig. 2 is the longitudinal sectional view of intake branch pipe among the present invention;

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;

Fig. 5 is the structural representation of B-B section among Fig. 4;

Fig. 6 is the structural representation of C-C section among Fig. 5;

Among them: 1. Engine intake pipe, 2. Air filter, 3. Throttle valve, 4. Intake manifold, 5. Intake branch pipe, 6. Engine, 7. Engine exhaust pipe, 8. Catalytic package, 9. Muffler , 10, rotating shaft, 11, control body, 12, stretching shaft, 13, stretching rod, 14, centrifugal shaft, 15, centrifugal cavity, 16, centrifugal body, 17, centrifugal spring, 18, arc plate, 19 , elastic band, 20, rotating plate, 21, rotating rod.

detailed description

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 Figures 1 to 6, the present invention comprises an engine intake pipe 1, an air filter 2, a throttle valve 3, an intake manifold 4, an intake branch pipe 5, an engine 6, an engine exhaust pipe 7, a catalytic package 8, and a muffler 9. Rotating shaft 10, control body 11, stretching shaft 12, stretching rod 13, centrifugal shaft 14, centrifugal chamber 15, centrifugal body 16, centrifugal spring 17, arc plate 18, elastic band 19, rotating plate 20, rotating rod 21. The air outlet of the engine intake pipe 1 is connected to the air inlet of the intake main pipe 4, the air outlet of the air intake main pipe 4 is connected to the air intake of the intake branch pipe 5, and the air outlet of the intake branch pipe 5 is connected to the engine 6 The intake port of the engine is connected, the air filter 2 and the throttle valve 3 are connected to the engine intake pipe 1 in sequence, the air outlet of the engine exhaust pipe 7 is connected to the exhaust port of the engine 6, and the catalytic package 8 and the muffler 9 are arranged in sequence On the engine exhaust pipe 7, the rotating shaft 10 is inlaid on the lower wall of the intake branch pipe 5, the rotating plate 20 is arranged in the intake branch pipe 5 and is fixed together with the rotating shaft 10, and the extended end of the rotating shaft 10 is connected to the One end of the rotating rod 21 is consolidated together, and the other end of the rotating rod 21 is hinged with one end of the stretching rod 13, and the other end of the stretching rod 13 is consolidated with one end of the stretching shaft 12, and the stretching shaft 12 The other end of the control body 11 is fixed with the upper arc plate 18 inside the control body, and one end of the centrifugal shaft 14 passes through the center of the front wall of the control body 11 and is embedded on the rear wall of the control body 11. The centrifugal chamber 15, centrifugal body 16. Centrifugal spring 17, circular arc plate 18, and elastic band 19 are all arranged in the control body 11. The centrifugal chamber 15 and the centrifugal shaft 14 are consolidated together. One end of the centrifugal body 16 is arranged in the centrifugal chamber 15 and is connected to the The centrifugal shaft 14 is connected, the other end of the centrifugal body 16 is a circular arc structure, the other end of the centrifugal body 16 is in sealing contact with the circular arc plate 18, the elastic band 19 is arranged on the outer surface of the circular arc plate 18, and the other end of the centrifugal shaft 14 passes through The chain is connected with the crankshaft of the engine 4; the cross section of the inner cavity of the control body 11 is circular, the centrifugal chamber 15 and the arc plates 18 are arranged in an array in the control body 11, and the number of the arc plates 18 is greater than or Equal to the number of centrifugal chambers 15, the width of the gap between the arc plates 18 is smaller than the cross-sectional width of the centrifugal body 16, and the elastic band 19 has an elastic steel wire structure inside.

In the working process of the present invention, when the engine speed increased, the rotational speed of the centrifugal shaft 14 also increased, and the centrifugal force of the centrifugal body 16 arranged in the centrifugal cavity 15 increased during the rotation, and the centrifugal body 16 moved outward synchronously and Stretching the centrifugal spring 17, the upper arc plate 18 arranged in the control body 11 moves upwards after being subjected to the centrifugal force of the centrifugal body 16, and the stretching shaft 12 also moves up synchronously, and the stretching shaft 12 drives the stretching rod 13 to move up , so that the stretch rod 13 pulls the rotating rod 9, the rotating shaft 10, and the rotating plate 20 to rotate clockwise together, the intake branch pipe shrinks and the pumping loss becomes smaller; when the engine speed is low, the speed of the centrifugal shaft 14 is also Lower, under the action of the centrifugal spring 17 and the elastic band 19, the centrifugal body 16 moves inward synchronously, the upper arc plate 18 arranged in the control body 11 moves downward, and the stretching shaft 12 also moves down synchronously, and the stretching shaft 12 Drive the stretching rod 13 to move down, so that the stretching rod 13 drives the rotating rod 9, the rotating shaft 10, and the rotating plate 20 to rotate counterclockwise together, the intake branch pipe shrinkage becomes smaller, the tumble ratio becomes larger, and the combustion efficiency is higher.

Claims (2)

1. A rotary tumble ratio adjustment system, comprising engine intake pipe (1), air filter (2), throttle valve (3), intake manifold (4), intake branch pipe (5), engine (6) , engine exhaust pipe (7), catalytic package (8), muffler (9), the air outlet of the engine air intake pipe (1) is connected with the air inlet of the air intake main pipe (4), and the air intake main pipe (4) The air outlet of the air intake branch pipe (5) 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 passage of the engine (6), and the air filter (2) and the throttle valve (3) are sequentially Connected to the engine intake pipe (1), the outlet of the engine exhaust pipe (7) is connected to the exhaust port of the engine (6), and the catalytic package (8) and muffler (9) are arranged in the engine exhaust pipe in sequence (7), it is characterized in that it also includes a rotating shaft (10), a control body (11), a stretching shaft (12), a stretching rod (13), a centrifugal shaft (14), a centrifugal cavity (15), a centrifugal Body (16), centrifugal spring (17), arc plate (18), elastic band (19), rotating plate (20), rotating rod (21), and rotating shaft (10) is inlaid under the intake pipe (5) On the wall, the rotating plate (20) is arranged in the intake branch pipe (5) and is fixed together with the rotating shaft (10), and the extended end of the rotating shaft (10) is fixed together with one end of the rotating rod (21) , the other end of the rotating rod (21) is hinged with one end of the stretch rod (13), the other end of the stretch rod (13) is consolidated with one end of the stretch shaft (12), and the stretch shaft (12 ) and the upper end arc plate (18) inside the control body (11) are solidified together, and one end of the centrifugal shaft (14) passes through the center of the front wall of the control body (11) and is embedded in the control body (11) On the rear wall of the control body (11), the centrifugal cavity (15), the centrifugal body (16), the centrifugal spring (17), the arc plate (18), and the elastic band (19) are all arranged in the control body (11), and the centrifugal cavity (15) and The centrifugal shaft (14) is consolidated together, and one end of the centrifugal body (16) is arranged in the centrifugal cavity (15) and connected with the centrifugal shaft (14) by the centrifugal spring (17), and the other end of the centrifugal body (16) is Arc structure, the other end of the centrifugal body (16) is in sealing contact with the arc plate (18), the elastic band (19) is arranged on the outer surface of the arc plate (18), and the other end of the centrifugal shaft (14) is connected to the engine through a chain (4) connected to the crankshaft. 2. The rotary tumble ratio adjustment system according to claim 1, characterized in that the cross-section of the inner cavity of the control body (11) is circular, and the centrifugal cavity (15) and the arc plate (18) are arranged in the control body (11) are arranged in an array, the number of arc plates (18) is greater than or equal to the number of centrifugal chambers (15), and the gap width between arc plates (18) is smaller than the transverse direction of centrifugal body (16). Section width, elastic band (19) inside has elastic steel wire structure.