CN202544977U

CN202544977U - Secondary air control device of motorcycle

Info

Publication number: CN202544977U
Application number: CN 201220116484
Authority: CN
Inventors: 姜文龙; 杨百全; 赵向阳
Original assignee: Jiangmen Dachangjiang Group Co Ltd
Current assignee: Jiangmen Dachangjiang Group Co Ltd
Priority date: 2012-03-23
Filing date: 2012-03-23
Publication date: 2012-11-21
Anticipated expiration: 2022-03-23

Abstract

The utility model discloses a secondary air control device of a motorcycle. The secondary air control device comprises a valve body provided with an air inlet cavity, an air outlet cavity and a negative pressure cavity, wherein the air inlet cavity, the air outlet cavity and the negative pressure cavity are respectively provided with an air inlet pipe, an air outlet pipe and a negative pressure pipe, the air inlet cavity is communicated with the air outlet cavity through a communication cavity, and a connecting part of the communication cavity and the air outlet cavity is provided with a reed valve; a valve element capable of opening and closing the air inlet pipe and the communication cavity according to the negative pressure condition of the negative pressure cavity is also arranged in the valve body and comprises a valve rod and a valve block positioned in the air inlet cavity; a first partition wall between the air inlet cavity and the communication cavity is provided with a through hole used for the valve rod and air to pass through, and the through hole can be closed by the valve block; and an air inlet channel used for communicating the air inlet cavity and the communication cavity is arranged on the valve element. According to the secondary air control device, through the arrangement of the air inlet channel on the valve element, a countercurrent problem caused by engine exhaust and a valve body oil accumulation problem caused by the countercurrent problem of the engine are reduced; and meanwhile, liquid water in the valve body can be conveniently and timely volatilized away along with supplied air flows.

Description

A kind of motorcycle secondary pneumatic control device

Technical field

The utility model relates to a kind of motorcycle secondary pneumatic control device, belongs to the purifying vehicle exhaust gas technical field specifically.

Background technique

What general domestic two-wheeled vehicle generally adopted is the mechanical type Carburetor, and this makes arranges by the tail gas of Motor Vehicle difficulty reaches relevant emission standards, for this reason, generally adopts the secondary air control gear to reduce CO, HC, NO _XDeng discharge amount; Through the secondary air control gear ozone is incorporated in the engine cylinder head; The negative pressure pipe and the engine charge end of secondary air control gear join; Suction tude links to each other with empty filter or other inlet air filtration system, and steam outlet pipe connects with the exhaust branch pipe of motor, and the pulse negative pressure that produces when utilizing engine exhaust comes in good time to open or close inlet, outlet to reach the purpose of tonifying Qi.The valve body of existing motorcycle secondary pneumatic control device is provided with air-inlet cavity, outlet chamber and negative cavity; On air-inlet cavity, outlet chamber and negative cavity, be respectively arranged with suction tude, steam outlet pipe and negative pressure pipe; Into and out of being communicated with by communicated cavity between the air cavity, the two ends of communicated cavity are opened and closed by valve block and leaf valve respectively; When the engine charge end was negative pressure, the valve block in the air-inlet cavity was up, was communicated with suction tude and air-inlet cavity, and fresh air leads to outlet chamber through suction tude, air-inlet cavity and communicated cavity and gets in the exhaust branch pipe; When engine charge end negative pressure was excessive, the valve body wall that valve block continues between up and communicated cavity and the air-inlet cavity was fitted and partition air-inlet cavity and communicated cavity, to stop to the tonifying Qi of engine exhaust arm; When vehicle driving is in non-at the uniform velocity state; Valve block in the air-inlet cavity can cut off air-inlet cavity and communicated cavity or suction tude regularly, but because the hysteresis quality of negative cavity responding engine causes the valve block start to lag behind, thereby the partition of air-inlet cavity and communicated cavity is postponed; The phase difference phenomenon appears; As shown in Figure 1, wherein curve A is represented negative pressure, and curve B is relative with negative pressure in theory flow of air supply; Curve C be in the reality because of the flow of air supply that hysteresis quality occurred of valve block start, wherein △ ρ is the phase difference that causes; The existence of phase difference makes valve block in the time should cutting off air-inlet cavity and communicated cavity or suction tude and fail in time to cut off; Make that fresh air continues to mend in the communicated cavity; This will cause leaf valve (one-way valve) can not in time close because of the entering of fresh air at the direct draught of engine exhaust end; The leaf valve start sensitivity be affected; Simultaneously, because of can not in time closing to close at the direct draught of engine exhaust end, leaf valve strengthens the valve body inner product oil problem that reflux problem that engine exhaust brought and adverse current are brought, the timely volatilization that also is unfavorable for amassing the liquefaction water in valve body.

The model utility content

In order to overcome the deficiency of existing technology; The utility model provides a kind of motorcycle secondary pneumatic control device; It can effectively improve the sensitivity of the action of leaf valve in the secondary air control gear, in time close the reflux problem that leaf valve is brought when reducing engine exhaust, and helps the timely volatilization of the liquid gas in the valve body.

The utility model solves the technological scheme that its technical problem adopted:

A kind of motorcycle secondary pneumatic control device; It comprises the valve body that is provided with air-inlet cavity, outlet chamber and negative cavity; On air cavity and negative cavity, be respectively arranged with into and out of tracheae and negative pressure pipe; Air-inlet cavity is connected with outlet chamber through communicated cavity, is provided with leaf valve in the joint of communicated cavity and outlet chamber; The spool that can open and close suction tude and communicated cavity according to the negative pressure condition of negative cavity also is installed in the said valve body; Spool comprises valve rod and the valve block that is arranged in air-inlet cavity; First next door between said air-inlet cavity and the communicated cavity is provided with the via hole that is used for through valve rod and air; Said via hole can be sealed by valve block, and said spool is provided with the gas-entered passageway that is used to be communicated with air-inlet cavity and communicated cavity.

As the improvement of technique scheme, said gas-entered passageway is located on the valve rod, and the bottom that an end of gas-entered passageway extends to valve rod communicates with air-inlet cavity, and the other end perforate from the sidewall of valve rod communicates with communicated cavity.

As the further improvement of technique scheme, said gas-entered passageway is located on the valve block, and gas-entered passageway is positioned at the orthographic projection scope of said via hole on valve block, or with this via hole orthographic projection overlapping portion is arranged.

Preferably, said suction tude, steam outlet pipe and negative pressure pipe are all formed by tubular body with the bowl-shaped hoop that is connected tubular body one end respectively, have three cavitys on the valve body, and opposed setting of cavity and bowl-shaped hoop forms said air-inlet cavity, outlet chamber and negative cavity.

Further, the bowl-shaped hoop compression fit of said suction tude through suction tude one end is on the inwall of air-inlet cavity.

Further, said valve body is provided with second next door, and second next door cuts off negative cavity and communicated cavity; Valve rod is bearing on second next door; One end of valve rod is connected with valve block after passing first next door, the other end pass behind second next door with negative cavity in the diaphragm that is provided be connected, be set with stage clip on the valve rod.

Further, be set with seal ring on the said valve block, said seal ring has the last sealing lip and the lower seal lip of the upper and lower port of the said air-inlet cavity of sealing.

The beneficial effect of the utility model is: the utility model is through the setting of gas-entered passageway on the spool; Make and also can communicate when air-inlet cavity and communicated cavity are cut off by valve block; Make valve block can seal communicated cavity faster; Cause leaf valve in time to close, thereby reduced the valve volume of oil problem that the reflux problem that engine exhaust brought and reflux problem are brought; Simultaneously, after air-inlet cavity and communicated cavity are communicated with, also be convenient to be walked by volatilization timely with the tonifying Qi air-flow based on the liquefaction water in the valve body; In addition, being arranged so that when the communicated cavity air inlet of this gas-entered passageway can increase the gas flow of secondary air control gear path, thereby strengthens the oxygenation efficiency to waste gas, reduces the pollution to atmosphere.The utility model is simple and reasonable, and operating procedure is simple.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Fig. 1 is the phase difference schematic representation of secondary air control gear;

Fig. 2 is the structural representation of the utility model;

Fig. 3 is the plan view of Fig. 2;

Fig. 4 is the sectional view in D-D cross section among Fig. 3.

Embodiment

With reference to Fig. 1 ~ Fig. 4; A kind of motorcycle secondary pneumatic control device of the utility model; It comprises the valve body 1 that is provided with air-inlet cavity 11, outlet chamber 12 and negative cavity 13; On air cavity 11,12 and negative cavity 13, be respectively arranged with into and out of

tracheae

2,3 and negative pressure pipe 4, be made up of tubular body and the bowl-shaped hoop that is arranged on tubular body one end respectively into and out of

tracheae

2,3 and negative pressure pipe 4, tubular body and bowl-shaped hoop are one-body molded; Have three cavitys on the valve body 1, bowl-shaped hoop and cavity be opposed to be provided with and to form described air-inlet cavity 11, outlet chamber 12 and negative cavity 13; Suction tude 2 adopts through the bowl-shaped hoop that is arranged on suction tude 2 one ends and compresses the technology compression fit on the inwall of air-inlet cavity 11; Also can adopt the gluing sealing means bowl-shaped hoop to be connected the port of valve body 1 air-inlet cavity 11; Suction tude 2 connects the sky filter or links to each other with other inlet air filtration system; Steam outlet pipe 3 and negative pressure pipe 4 be through adopting screw 21 to be fastened on the valve body 1 with its bowl-shaped hoop that links to each other respectively, and steam outlet pipe 3 and negative pressure pipe 4 be sending and receiving engine exhaust arm and engine charge ends respectively; Air-inlet cavity 11 is connected with outlet chamber 12 through communicated cavity 14, is provided with leaf valve 5 in the joint of communicated cavity 14 and outlet chamber 12, and leaf valve 5 is fixed on the valve body 1; The spool that can open and close suction tude 2 and communicated cavity 14 according to the negative pressure condition of negative cavity 13 also is installed in the said valve body 1, and spool comprises valve rod 6 and the valve block 7 that is arranged in air-inlet cavity 11, and said valve body 1 is provided with first next door 15 and second next door 16; First next door 15 is used to cut off air-inlet cavity 11 and communicated cavity 14; First next door 15 is provided with the via hole 151 that is used for through valve rod 6 and air, and said via hole 151 can be by valve block 7 sealings, and second next door 16 cuts off negative cavity 13 and communicated cavity 14; Valve rod 6 is bearing on second next door 16; One end of valve rod 6 passes 15 backs, first next door and connects with valve block 7, and the other end of valve rod 6 passes 16 backs, second next door and connects with the diaphragm that is provided with in the negative cavity 13 8, on the valve rod 6 between second next door 16 and the valve block 7, is set with stage clip 9; Can valve rod 6 be positioned at valve block 7 above locate to install one be used for apical grafting stage clip 9 lining; Valve rod 6 can move axially under action of air pressure according to the negative pressure condition of negative cavity 13, opens and closes suction tude 2 and air-inlet cavity 11 to drive valve block 7, in order to increase the sealability of valve block 7; Can on valve block 7, be set with seal ring 17; Said seal ring 17 has the last sealing lip and the lower seal lip of the said air-inlet cavity 11 upper and lower ports of sealing, and when the up sealing of spool air-inlet cavity 11, the last sealing lip of seal ring 17 is sealed into the port of air cavity 11; When spool is descending when being sealed into tracheae 2, the port of the lower seal lip seal suction tude 2 of seal ring 17; Said spool is provided with the gas-entered passageway 10 that is used to be communicated with air-inlet cavity 11 and communicated cavity 14.Said gas-entered passageway 10 can be located on the valve rod 6, and the bottom that an end of gas-entered passageway 10 extends to valve rod 6 communicates with air-inlet cavity 11, and the other end perforate from the sidewall of valve rod 6 communicates with communicated cavity 14.In addition, as shown in Figure 4, said gas-entered passageway 10 also can be located on the valve block 7, and gas-entered passageway 10 is positioned at the orthographic projection scope of said via hole 151 on valve block 7, or with these via hole 151 orthographic projections overlapping portion is arranged.Certainly, gas-entered passageway 10 can also be arranged on valve block 7 and the valve rod 6 simultaneously.

The working principle of the described motorcycle secondary pneumatic control device of the utility model is such: when engine operation; Inlet end produces negative pressure; This moment, it is up that barometric pressure just can promote valve block 7 actuate valve stem 6 because external atmosphere pressure is big than the inlet end pressure of motor, and valve block 7 is away from the suction port of suction tude 2; The lower seal lip of seal ring 17 no longer seals suction tude 2; Fresh air enters into air-inlet cavity 11, and the pressure that 9 pairs of valve blocks 7 of suction that negative pressure is produced diaphragm 8 in negative cavity 13 and stage clip are produced balances each other, and valve block 7 is not against on the port of communicated cavity 14; Fresh air part in the air-inlet cavity 11 enters into outlet chamber 12 through communicated cavity 14 at this moment; Another part leads in the communicated cavity 14 through gas-entered passageway 10 and enters into outlet chamber 12, and is as shown in Figure 4, and the arrow in the valve body 1 is represented the flow direction of secondary air control gear fresh air when tonifying Qi.

When vehicle driving is in non-at the uniform velocity state; Valve block 7 in the air-inlet cavity 11 can cut off air-inlet cavity 11 and communicated cavity 14 or suction tude 2 regularly, and the setting of gas-entered passageway 10, can be so that when valve block 7 sealing communicated cavitys 14; Air in the communicated cavity 14 can be discharged by gas-entered passageway 10; Form an airflow direction in the indirect guiding communicated cavity 14, make that the air in the communicated cavity 14 reduces the resistance of valve block 7, can accelerate valve block 7 sealing communicated cavitys 14; When valve block 7 was opened communicated cavity 14, fresh air can enter into communicated cavity 14 in advance from gas-entered passageway 10, as shown in Figure 1; Promptly increase the flow of Q1; Reduce the flow of Q2, the hysteresis of the valve block 7 that reduces to bring because of the hysteresis quality of negative cavity 13 responding engines, thus reduce the phase difference of valve block 7.

In addition, when outlet chamber 12 tonifying Qi, the structure of gas-entered passageway is not set in the conventional art; Being provided with of gas-entered passageway 10 increased the flow of air supply that is added in the outlet chamber 12; Strengthened oxidation, improved exhaust gas discharging, reduced pollution atmosphere to waste gas in the motor.

Simultaneously; In that time of engine exhaust; Consider that hysteresis quality because of valve block 7 causes valve block 7 to fail in time to seal communicated cavity 14 and makes communicated cavity 14 continue tonifying Qi, cause the actual pressure in the communicated cavity 14 to be higher than theoretical pressure, hinder leaf valve 5 and in time close; Thereby the exhaust meeting of motor enters into communicated cavity 14 by steam outlet pipe 3; The setting of gas-entered passageway 10 is convenient to air in the communicated cavity 14 and from gas-entered passageway 10, is in time discharged, and reduces the influence that communicated cavity 14 air are closed leaf valve 5, makes leaf valve 5 and closes in advance when gas-entered passageway 10 is not set; Reduce the flow that engine exhaust enters into communicated cavity 14, thereby reduced the valve volume of oil problem that the reflux problem that engine exhaust brought and reflux problem are just come; Also be convenient to be walked by volatilization timely with the tonifying Qi air-flow based on the liquefaction water in the valve body.

When the pressure in the negative cavity 13 forwarded malleation to by negative pressure gradually, negative pressure reduced the suction of diaphragm 8, and valve rod 6 resets under the effect of stage clip 9 with valve block 7 gradually, was enclosed within the lower seal lip sealing suction port of valve block 7 after resetting.

The above, the preferred embodiments of the utility model just, but the utility model is not limited to the foregoing description as long as it reaches the technique effect of the utility model with any same or similar means, all should fall within the protection domain of the utility model.

Claims

1. motorcycle secondary pneumatic control device; Comprise the valve body (1) that is provided with air-inlet cavity (11), outlet chamber (12) and negative cavity (13); On air cavity (11,12) and negative cavity (13), be respectively arranged with into and out of tracheae (2,3) and negative pressure pipe (4); Air-inlet cavity (11) is connected with outlet chamber (12) through communicated cavity (14), is provided with leaf valve (5) in the joint of communicated cavity (14) and outlet chamber (12); The spool that can open and close suction tude (2) and communicated cavity (14) according to the negative pressure condition of negative cavity (13) also is installed in the said valve body (1); Spool comprises valve rod (6) and is arranged in the valve block (7) of air-inlet cavity (11); First next door (15) between said air-inlet cavity (11) and the communicated cavity (14) is provided with the via hole (151) that is used for through valve rod (6) and air; Said via hole can be by valve block (7) sealing, and it is characterized in that: said spool is provided with the gas-entered passageway (10) that is used to be communicated with air-inlet cavity (11) and communicated cavity (14).

2. a kind of motorcycle secondary pneumatic control device according to claim 1; It is characterized in that: said gas-entered passageway (10) is located on the valve rod (6); The bottom that one end of gas-entered passageway (10) extends to valve rod (6) communicates with air-inlet cavity (11), and the other end perforate from the sidewall of valve rod (6) communicates with communicated cavity (14).

3. a kind of motorcycle secondary pneumatic control device according to claim 1; It is characterized in that: said gas-entered passageway (10) is located on the valve block (7); Gas-entered passageway (10) is positioned at the orthographic projection scope of said via hole (151) on valve block (7), or with this via hole (151) orthographic projection overlapping portion is arranged.

4. according to each described a kind of motorcycle secondary pneumatic control device in the claim 1 ~ 3; It is characterized in that: said suction tude (2), steam outlet pipe (3) and negative pressure pipe (4) all are made up of tubular body and the bowl-shaped hoop that is connected tubular body one end respectively; Have three cavitys on the valve body (1), the opposed setting of cavity and bowl-shaped hoop forms said air-inlet cavity (11), outlet chamber (12) and negative cavity (13).

5. according to each described a kind of motorcycle secondary pneumatic control device in the claim 1 ~ 3, it is characterized in that: said suction tude (2) is passed through the bowl-shaped hoop compression fit of suction tude (2) one ends on the inwall of air-inlet cavity (11).

6. according to each described a kind of motorcycle secondary pneumatic control device in the claim 1 ~ 3; It is characterized in that: said valve body (1) is provided with second next door (16); Second next door (16) cuts off negative cavity (13) and communicated cavity (14); Valve rod (6) is bearing on second next door (16); One end of valve rod (6) passes back, first next door (15) and is connected with valve block (7), and the other end passes back, second next door (16) and is connected with the diaphragm (8) of setting in the negative cavity (13), is set with stage clip (9) on the valve rod (6).

7. according to each described a kind of motorcycle secondary pneumatic control device in the claim 1 ~ 3; It is characterized in that: be set with seal ring (17) on the said valve block (7), said seal ring (17) has the last sealing lip and the lower seal lip of the upper and lower port of sealing said air-inlet cavity (11).