CN104612810A - Device continuously variable in intake-tube volume - Google Patents

Abstract

A continuously variable volume device for an intake pipe belonging to the technical field of internal combustion engines, comprising an engine intake pipe, an engine, an engine exhaust pipe, a connecting pipe, an adjustment cavity, a moving plate, and a spring, the moving plate is arranged in the adjustment cavity and connected to the adjustment cavity The inner wall is in sealing contact, the moving plate is connected to the left wall of the adjustment chamber through a spring, one end of the second connecting pipe is connected to the left wall of the adjustment chamber, and the other end of the second connecting pipe is connected to the engine between the catalytic package and the muffler. The exhaust pipe is connected. In the present invention, when the engine is running at a low speed, the volume of the intake pipe is relatively large, and when the engine is running at a high speed, the volume of the intake pipe is small, and the volume of the intake pipe can be self-regulated. The invention has reasonable design and simple structure, and is suitable for the optimal design of the air intake system of the naturally aspirated internal combustion engine.

Description

Intake pipe volume continuously variable device

technical field

The invention belongs to the technical field of internal combustion engines, and specifically relates to a continuously variable device for intake pipe volume that can realize self-adjustment of the volume of the intake pipe of a naturally aspirated engine.

Background technique

Present engines can be divided into naturally aspirated and supercharged, and supercharged can be divided into mechanical supercharging, turbocharging and the latest air wave supercharging. The naturally aspirated type does not have a supercharger, which means that the air simply passes through the air filter, throttle valve, and intake manifold to reach the cylinder, and gasoline is directly injected into the intake manifold through the fuel injector. Taking a four-cylinder engine as an example, a piston has four strokes for one work: down (the intake valve opens, there is a pressure difference, and the mixture of air and fuel enters the cylinder under the action of the pressure difference), up (the intake valve closes , Compress the mixture, the piston goes up to the highest point and ignites), then goes down (the mixture burns and expands, pushes the piston to do work, and outputs power), and goes up again (exhaust valve opens, exhaust). The naturally aspirated type means that in the first stroke above, the mixed gas is inhaled by the pressure difference formed naturally. The supercharged type means that the gas is compressed first to increase the pressure and density of the gas. The difference and the high pressure of the gas itself are used to increase the intake air volume and increase the power. For naturally aspirated engines, variable intake manifold technology is more common. The variable intake manifold improves the combustion efficiency by changing the length and cross-sectional area of the intake pipe, making the engine more stable at low speeds and with more sufficient torque, and smoother and more powerful at high speeds. Under ideal conditions, the larger the intake manifold volume is, the better it is at low-speed conditions, and the smaller the intake manifold volume is, the better it is at high-speed conditions. In this way, the charging efficiency of the engine is higher and the performance is better at each speed. better.

After searching the existing literature, it is found that the patent application number is 20142022823.6, and the patent technology named variable intake manifold for small displacement engines provides a two-stage variable exhaust pipe volume technology, but it cannot Reality is continuously variable.

Contents of the invention

The present invention aims at the above disadvantages, and provides a continuously variable device for the volume of the intake pipe, which can realize the continuous change of the volume of the intake pipe.

The present invention is realized through the following technical solutions, the present invention comprises engine intake pipe, air filter, throttle valve, engine, engine exhaust pipe, catalytic package, muffler, first connecting pipe, adjustment cavity, moving plate, spring, The second connecting pipe, the air outlet of the engine intake pipe is connected with the intake port of the engine, the air outlet of the engine exhaust pipe is connected with the exhaust port of the engine, the air filter and the throttle valve are arranged on the engine intake pipe in sequence, and the catalytic The airbag and muffler are arranged on the exhaust pipe of the engine in sequence. The adjustment chamber is a cuboid structure, and the cross section of the moving plate is rectangular. The moving plate is arranged in the adjustment chamber and is in sealing contact with the inner wall of the adjustment chamber. It communicates with the engine intake pipe behind the throttle, the other end of the first connecting pipe communicates with the right wall of the regulating chamber, the moving plate connects with the left wall of the regulating chamber through a spring, and one end of the second connecting pipe connects with the left wall of the regulating chamber The other end of the second connecting pipe communicates with the engine exhaust pipe between the catalytic package and the muffler.

The beneficial effects of the present invention are: the present invention has reasonable design and simple structure, the volume of the intake pipe can be continuously variable, and the performance of the engine under various rotational speed conditions is good.

Description of drawings

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

Fig. 2 is the structural representation of A-A section among Fig. 1;

The labels in the accompanying drawings are respectively: 1, engine intake pipe, 2, air filter, 3, throttle valve, 4, engine, 5, engine exhaust pipe, 6, catalytic package, 7, muffler, 8, first connection Pipe, 9, regulating cavity, 10, moving plate, 11, spring, 12, second 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 shown in Fig. 1 to Fig. 2, and the present invention comprises engine intake pipe 1, air filter 2, throttle valve 3, engine 4, engine exhaust pipe 5, catalytic bag 6, muffler 7, the first connecting pipe 8. Regulating cavity 9, moving plate 10, spring 11, second connecting pipe 12, the air outlet of the engine intake pipe 1 is connected with the air intake of the engine 4, the air outlet of the engine exhaust pipe 5 is connected with the exhaust port of the engine 4 The air filter 2 and the throttle valve 3 are sequentially arranged on the engine intake pipe 1, the catalytic package 6 and the muffler 7 are sequentially arranged on the engine exhaust pipe 5, the adjustment chamber 9 is a cuboid structure, and the cross section of the moving plate 10 It is rectangular, and the moving plate 10 is arranged in the adjustment chamber 9 and is in sealing contact with the inner wall of the adjustment chamber 9. One end of the first connecting pipe 8 communicates with the engine intake pipe 1 behind the throttle valve 3, and the other end of the first connecting pipe 8 communicates with the engine intake pipe 1 after the throttle valve 3. The right wall of the adjustment chamber 9 is connected, the moving plate 10 is connected with the left wall of the adjustment chamber 9 by a spring 11, one end of the second connecting pipe 12 is connected with the left wall of the adjustment chamber 9, and the other end of the second connecting pipe 12 is connected with the left wall of the adjustment chamber 9. The engine exhaust pipe 5 between the catalytic package 6 and the muffler 7 is connected.

During the implementation of the present invention, the moving plate 10 can move left and right in the adjustment cavity 9 . When the engine is running at high speed, the pressure on the left side of the moving plate 10 is relatively high, the moving plate 10 moves to the right and stretches the spring 11, and the volume of the intake pipe behind the throttle valve 3 is small; when the engine is running at a low speed , the pressure on the left side of the moving plate 10 is low, and the moving plate 10 moves to the left under the tension of the spring 11, and the volume of the intake pipe behind the throttle valve 3 is relatively large. Therefore, the present invention can realize continuous variable volume of the intake pipe.

Claims (1)

1. a suction tude volume continuous changeable device, comprise engine air inlet tube (1), air filter (2), closure (3), motor (4), engine exhaust pipe (5), catalysis bag (6), baffler (7), the air outlet of engine air inlet tube (1) is connected with the intake duct of motor (4), the air outlet of engine exhaust pipe (5) is connected with the air outlet flue of motor (4), air filter (2), closure (3) is arranged on engine air inlet tube (1) successively, catalysis bag (6), baffler (7) is arranged on engine exhaust pipe (5) successively, it is characterized in that, also comprise the first connecting tube (8), regulate chamber (9), shifting board (10), spring (11), second connecting tube (12), chamber (9) is regulated to be rectangular structure, the cross section of shifting board (10) is rectangular, shifting board (10) is arranged in regulate in chamber (9) and seal with the internal face of adjustment chamber (9) and contacts, one end of first connecting tube (8) is communicated with closure (3) rear engine suction tude (1), the other end of the first connecting tube (8) is communicated with regulating the right wall in chamber (9), shifting board (10) is connected with regulating the left wall in chamber (9) by spring (11), one end of second connecting tube (12) is connected with regulating the left wall in chamber (9), the other end of the second connecting tube (12) and catalysis bag (6), engine exhaust pipe (5) between baffler (7) is connected.