CN101555845B

CN101555845B - Automatic adjustment resonance device

Info

Publication number: CN101555845B
Application number: CN2009100844860A
Authority: CN
Inventors: 赵立峰; 何鹏; 成传松; 李云清
Original assignee: Beihang University
Current assignee: Beihang University
Priority date: 2009-05-18
Filing date: 2009-05-18
Publication date: 2011-01-05
Anticipated expiration: 2029-05-18
Also published as: CN101555845A

Abstract

The invention discloses an automatic adjustment resonance device, which is applied to an air inlet system of an engine. The device comprises a rubber buffer block, a variable rigidity spring, a first plate, a second plate and a third plate. The variable rigidity spring is fixed on the rubber buffer block and the free end thereof is rightly contacted with the third plate; the first plate, the second plate and the third plate and the bottom surface of a pressure-stabilizing cavity form a four link structure; the basic shape of the four link structure is a rectangle with the height lower than thelower edge of an air inlet manifold. The automatic adjustment resonance device has compact structure, eliminates the original resonance cavity part, is beneficial to total distribution of an engine b in, has automatic adjustment capability, changes reflection characteristics to pressure wave of an air inlet manifold, utilizes the pulsation effect to increase the air inlet charging coefficient and realizes the improvement of speed characteristics of the whole engine.

Description

Automatically regulate resonance device

Technical field

The present invention relates to a kind of automatic adjusting resonance device that is used to regulate engine aspirating system, belong to engine art.

Background technique

In order to improve the air inlet rate of motor, usually in engine aspirating system, have resonant cavity, resonant cavity is with the auxiliary device of helping carry air in engine cylinder, be used to improve engine aspirating system, resonant cavity increases the amount of fresh air that enters cylinder by utilizing the pulsation or the pressure wave that produce in the engine intake process, and then can spray into more fuel, promote the power character of motor.

Gas handling system commonly used as shown in Figure 1, gas handling system comprises intake manifold 1, pressure stabilizing cavity 2, resonant cavity 3, connecting passage 4 and intake manifold 5.Fresh air enters pressure stabilizing cavity 2 by intake manifold 1, be transported to each firing chamber of motor by intake manifold 5, because the quick unlatching of the to-and-fro motion of engine piston and intake valve and taking a seat, form pressure wave and transfer back to pressure stabilizing cavity 2 through intake manifold 5, enter resonant cavity 3 inside by connecting passage 4, resonant cavity 3 acts on air inlet with the pulsation effect that reflects and flows, and promotes engine charge efficient.

Because resonant cavity 3 structures are fixed in the said structure, when engine speed change, notable change all takes place in speed air flow and dynamic pressure in the pressure stabilizing cavity 3, each pipeline charge flow rate difference of intake manifold 5 can increase, and prior art does not have the function of regulating pressure stabilizing cavity 2 inner spaces according to the motor different rotating speeds automatically; Resonant frequency in the difference of rotating speed, gas handling system changes, and needs the ability of regulating resonance effect.Resonant cavity takies space outerpace simultaneously, has increased the motor installing space.Therefore, need a kind of compact structure, have the resonance device of regulating power, both can regulate the air flows in the pressure stabilizing cavity 2, can make full use of the pulsation that produces in the intake manifold 5 again.

Summary of the invention

The objective of the invention is to be provided with separately in order to solve existing resonant cavity, take the space of engine bin, do not have the function of regulating the pressure stabilizing cavity inner space according to the motor different rotating speeds automatically, propose a kind of automatic adjusting resonance device, device of the present invention can improve the charging efficiency of the high low speed of motor.

A kind of automatic adjusting resonance device is applied to it is characterized in that in the gas handling system of motor: comprise damping rubber block, variable rate spring, first flat board, second dull and stereotyped and the 3rd flat board;

Damping rubber block is a wedge-shaped blocks, has a plurality of spring seats on the inclined-plane of wedge-shaped blocks, and an end of variable rate spring fixedly is bonded in the spring seat, and the bottom surface of wedge-shaped blocks is pasted or is fixed by bolts on the corresponding intake manifold's of pressure stabilizing cavity the sidewall; The other end of variable rate spring contacts the 3rd flat board.

One end of first flat board is connected with first with an end of second flat board, first flat board can rotate freely around first with second flat board, one end of the other end of second flat board and the 3rd flat board is connected with second, and second flat board and the 3rd flat board can rotate freely around second;

First flat board is connected the 3rd, the 4th respectively with the other end of the 3rd flat board, described the 3rd, the 4th two ends are fixed on two adjacent sidewalls of intake manifold place sidewall of pressure stabilizing cavity, first, second two ends freedom is unsettled, second flat board is over against intake manifold, the free end of variable rate spring just contacts the 3rd flat board, a four-bar linkage structure is formed in the bottom surface of first flat board, second flat board, the 3rd flat board and pressure stabilizing cavity, described four-bar linkage structure basic shape is a rectangle, and the height of rectangle is lower than intake manifold's lower edge.

Described first flat board, second flat board, the 3rd dull and stereotyped cover film of going up, described film length, surface area, material are all different, are used to reflect the pressure wave of air impulsive motion.

Have through hole on described first flat board, the 3rd flat board, be used to make the four-bar linkage structure internal and external pressure balance.

The invention has the advantages that:

(1) automatic adjusting resonance device compact structure of the present invention has been cancelled original resonant cavity part, and is strong in the general arrangement of engine bin;

(2) can improve the intake uniformity of intake manifold during low engine speed, improve the air inlet charge of each cylinder of motor, improve the workmanship uniformity of each cylinder;

(3) regulate resonance device automatically and have self-regulation ability, change, utilize pulsation effect to promote the engine charge volumetric efficiency air-distributor pressure wave reflection characteristic;

(4) pressure stabilizing cavity has the advantages that volume can change, and regulates the adjustment of resonance device automatically, can directly adjust the pressure stabilizing cavity volume, realizes the improvement of the speed characteristics of motor complete machine.

Description of drawings

Fig. 1 is the structural representation of gas handling system in the background technique of the present invention;

Fig. 2 is the gas handling system schematic representation of the invention process can regulate resonance device;

Fig. 3 is the damping rubber block schematic representation that has variable rate spring among the present invention;

Fig. 4 is the turnable resonator device schematic representation that the present invention is equipped with the four-bar linkage structure composition of film.

Among the figure:

1-intake manifold 2-pressure stabilizing cavity 3-resonant cavity 4-connecting passage

5-intake manifold 6-variable rate spring 7-damping rubber block 8-spring seat

The 9-first dull and stereotyped 10-second dull and stereotyped 11-the 3rd dull and stereotyped 12-bottom surface

The 4th of the 3rd 16-of second 15-of first 14-of 13-

17-closure 18-through hole

Embodiment

The present invention is described in further detail below in conjunction with drawings and Examples.

The present invention is a kind of automatic adjusting resonance device, as shown in Figure 2, comprises damping rubber block 7, variable rate spring 6, first flat board, 9, second dull and stereotyped the 10 and the 3rd flat board 11.

Damping rubber block 7 is a wedge-shaped blocks, as shown in Figure 3, have a plurality of spring seats 8 on the inclined-plane of wedge-shaped blocks, an end of variable rate spring 6 fixedly is bonded in the spring seat 8, as shown in Figure 2, the bottom surface 12 of wedge-shaped blocks is pasted or is fixed by bolts on pressure stabilizing cavity 2 corresponding intake manifolds' 1 the sidewall;

As shown in Figure 4, one end of first flat board 9 is connected with first 13 with an end of second flat board 10, first dull and stereotyped 9 and second flat board 10 can rotate freely around first 13, the other end of second flat board 10 is connected with second 14 with an end of the 3rd flat board 11, second dull and stereotyped the 10 and the 3rd flat board 11 can rotate freely around second 14, cover film is used to reflect the pressure wave of air impulsive motion on described first flat board, 9, the second flat boards, 10, the three flat boards 11; As shown in Figure 2, first dull and stereotyped 9 is connected the 3rd 15 respectively with the other end of the 3rd flat board 11, the 4th 16, described the 3rd 15, the 4th 16 two ends are separately fixed on two adjacent sidewalls with intake manifold's 1 place sidewall of pressure stabilizing cavity 2, first 13, second 14 two ends freedom is unsettled, second flat board 10 is over against intake manifold 5, the free end of variable rate spring 6 just contacts the 3rd flat board 11, first flat board 9, second flat board 10, a four-bar linkage structure is formed in the bottom surface of the 3rd flat board 11 and pressure stabilizing cavity 2, described four-bar linkage structure basic shape is a rectangle, the height of rectangle is lower than intake manifold's lower edge, described first flat board 9, have through hole 18 on the 3rd flat board 11, as shown in Figure 4, because described four-bar linkage structure has taken certain space in pressure stabilizing cavity 2, between little space that forms and the pressure stabilizing cavity 2 pressure difference is arranged, by first flat board 9, have through hole 18 on the 3rd flat board 11, guarantee the four-bar linkage structure internal and external pressure balance.

Variable rate spring 6 can bear the impact that described four-bar linkage structure vibration brings, the effect that also has restriction four-bar linkage structure displacement range.The power that variable rate spring 6 produces on four-bar linkage structure, the air pressure that acts on the four-bar linkage structure with gas handling system forms equilibrant, makes automatic adjusting resonance device be in steady state.Air pressure wave in the described four-bar linkage structure usable reflection gas handling system.

Length, surface area, the material of described first flat board 9, second dull and stereotyped the 10 and the 3rd dull and stereotyped 11 upper films are all inequality, so first flat board 9, second dull and stereotyped 10 has different frequencies with the 3rd dull and stereotyped 11 upper films, the fundamental frequency of film obtains according to the air impulsive motion frequency computation part under the engine calibration state, when the resonance device structure changes, its frequency also has adjustment, variation that can certain limit endoadaptation engine aspirating system air impulsive motion frequency.

There is closure 17 at intake manifold 1 place, the air-flow that flows to intake manifold 5 is through regulating resonance device automatically, the pressure of air-flow produces pressure to first flat board 9, second flat board the 10, the 3rd dull and stereotyped 11, itself and variable rate spring 6 actings in conjunction, make four-bar linkage structure be in the equilibrium position, at the automatic adjusting resonance device of equilibrium position and the pressure pulse generation resonance of charge air flow, automatically regulating resonance device helps fresh air conveying in the cylinder of motor, as shown in Figure 2, first flat board 9, second flat board 10, the 3rd flat board 11 are placed on the right opposite of intake manifold 5.

As shown in Figure 2, regulate resonance device automatically and be positioned at pressure stabilizing cavity 2, the existing resonant cavity 3 among Fig. 1 is in pressure stabilizing cavity 2 outsides, and the present invention has saved the space and the weight of engine aspirating system, makes its application more extensive.When engine speed is low, air velocity in the gas handling system is low, pressure is little, the pressure that acts on automatic adjusting resonance device is little, first flat board 9, second flat board 10, the 3rd flat board 11 of this moment are in relaxed state, integral body is offset to intake manifold's 1 direction, second flat board 10 is in lower position, adapts to the air pressure wave frequency of needs reflection this moment; When engine speed is higher, air velocity height, pressure in the gas handling system are big, the pressure that acts on automatic adjusting resonance device is bigger, first flat board 9, second flat board 10, the 3rd flat board 11 are deformed, second flat board 10 among Fig. 2, second 14 of the connection of the 3rd flat board 11 are risen, first flat board 9, second dull and stereotyped 10 connects first 13 and descends, second dull and stereotyped 10 forms the slope, this moment, variable rate spring 6 was in compressive state, and first flat board 9, second flat board 10, the 3rd flat board 11 are in steady state under the effect of variable rate spring 6.

The present invention utilizes the gas pressure ripple in the intake manifold 5 to realize improving the purpose of charging efficiency, described air pressure wave or pulsation are that air-flow is in entering the process of firing chamber, the air-breathing frequency of periodicity that piston displacement produces and the quick opening and closing of air intake valve produce, and this pulsation can be used to promote intake efficiency.

Described automatic adjusting resonance device is located in the pressure stabilizing cavity 2, and reflection is had simultaneously and regulated air-flow flowing in pressure stabilizing cavity 2 by the pressure wave that intake manifold 5 transmits, and improves the uniformity that enters the air-flow of intake manifold 5 by pressure stabilizing cavity 2.

Claims

1. regulate resonance device automatically, be applied in the gas handling system of motor, gas handling system comprises intake manifold, pressure stabilizing cavity and intake manifold, it is characterized in that: this device comprises damping rubber block, variable rate spring, first flat board, second dull and stereotyped and the 3rd flat board;

Damping rubber block is a wedge-shaped blocks, on the inclined-plane of wedge-shaped blocks, have several spring seats, one end of variable rate spring fixedly is bonded in the spring seat, and the bottom surface of wedge-shaped blocks is pasted or is fixed by bolts on the corresponding intake manifold's of pressure stabilizing cavity the sidewall, and the other end of variable rate spring contacts the 3rd flat board;

One end of first flat board is connected with first with an end of second flat board, first flat board can rotate freely around first with second flat board, one end of the other end of second flat board and the 3rd flat board is connected with second, and second flat board and the 3rd flat board can rotate freely around second; First flat board is connected the 3rd, the 4th respectively with the other end of the 3rd flat board, on adjacent two sidewalls of the intake manifold place sidewall that described the 3rd, the 4th two ends are fixed on pressure stabilizing cavity, first, second two ends freedom is unsettled, second flat board is over against intake manifold, the free end of variable rate spring just contacts the 3rd flat board, a four-bar linkage structure is formed in the bottom surface of first flat board, second flat board, the 3rd flat board and pressure stabilizing cavity, described four-bar linkage structure basic shape is a rectangle, and the height of rectangle is lower than intake manifold's lower edge.

2. automatic adjusting resonance device according to claim 1 is characterized in that: described first flat board, and second flat board, the 3rd flat board is gone up cover film, is used to reflect the pressure wave of air impulsive motion.

3. automatic adjusting resonance device according to claim 1 is characterized in that: have through hole on described first flat board, the 3rd flat board.