CN2254487Y

CN2254487Y - Secondary air-supply device for automotive vehicle

Info

Publication number: CN2254487Y
Application number: CN 96207539
Authority: CN
Inventors: 许汉义; 洪瑞宏
Original assignee: Kwang Yang Motor Co Ltd
Current assignee: Kwang Yang Motor Co Ltd
Priority date: 1996-04-11
Filing date: 1996-04-11
Publication date: 1997-05-21
Anticipated expiration: 2006-04-11

Abstract

The utility model relates to a secondary air-supply device for an automotive vehicle, comprising a barrel body, a filtering unit, and an air control device. An air chamber, a control chamber, and a negative pressure chamber are formed at the inner side of the barrel body; the air chamber is provided with an air inflow opening; the control chamber is communicated with the air chamber and is provided with an air outlet; the negative pressure chamber is communicated with a negative pressure taking opening between the engine air inlet opening and the carburetor of the automotive vehicle, and the negative pressure chamber and the control chamber are divided by a diaphragm; the filtering unit and the air control device are arranged in the control chamber of the barrel body; the linkage of the diaphragm can control the air flow rate in the air chamber in due time. Compared with the existing similar devices, the utility model enhances space utilization ratio, and reduces product cost.

Description

The secondary air-supply device of Motor Vehicle

The utility model refers in particular to a kind of utilization of space in the Motor Vehicle that improves relevant for a kind of secondary air-supply device of Motor Vehicle, reduces the cost of material of pipeline between each object and the integrated secondary air feeder of built-up time.

The use of Motor Vehicle is more and more universal in modern society, but current mobility car quantity is too many, and the exhausted air quantity that makes Motor Vehicle enter relatively also too much and seriously causes the harmful simultaneously health of atmospheric pollution; Why the waste gas of vehicular emission can cause atmospheric pollution and then be detrimental to health main because contain harmful gases such as a large amount of carbon monoxide and hydrocarbon in the waste gas, and the formation of this gas is since after gasoline and the air mixing in engine due to the incomplete combustion, so in Motor Vehicle is being advanced the way, along with engine with waste gas via after emission by exhaust pipe is to the atmosphere, after atmosphere mixes, not only can influence air quality, and in case will be harmful to health after the human body suction; Therefore, new line along with environmental consciousness, the current mobility car is all toward the target design of hanging down contaminant capacity, as use the unleaded gas or the burning running efficiency of increase engine etc. to reduce the discharge amount of motor vehicle exhaust gases, or as shown in Figure 1, include the filter element 20 that is located at car body 1 appropriate location and in the automobile exhausting pipeline, import one, pneumatic control device 22 and can make the be connected with each other secondary air-supply device 2 of logical pipeline 24 of aforementioned components, wherein, by air filter via filter element 20 and intake line 24 after, will be by the size of air mass flow in pneumatic control device 22 pilot line 24, air is the interval of 24 exhaust casing relief openings and outlet pipe ingress discharge by the road again, the high-temp waste gas that makes cylinder discharge can fill a part oxidation with fresh air, reducing exhaust gas discharging concentration, and then reach the effect of purifying exhaust air.

But still there is following shortcoming in above-mentioned known secondary air-supply device on reality is used:

(1) utilization ratio in space reduces in the Motor Vehicle:

As shown in Figure 1, adopt unpack format to be arranged at car body 1 appropriate location owing to learn the filter element 20 of secondary air-supply device 2 and pneumatic control device 22, again in being communicated with pipeline 24 in addition between the two, when therefore causing filter element 20 and pneumatic control device 22 to desire to be installed on the car body 1, must consider problems such as suitable space, two places and pipeline 24 connections simultaneously, and after making that filter element 20 and pneumatic control device 22 are on being installed in car body 1, can just relatively diminish for the space that utilizes in the Motor Vehicle, and reduce its space availability ratio.

(2) it is too high to be communicated with the cost of material and the built-up time of pipeline of each object:

Because the filter element 20 and the pneumatic control device 22 of known secondary air-supply device 2 are arranged at car body 1 appropriate location separately, and in being communicated with pipeline 24 in addition between the two, therefore when making filter element 20, must make respectively with pneumatic control device 22, and the time-consuming shortcoming that makes trouble is arranged, simultaneously, owing to must be connected with pipeline 24 between the two, so must make the pipeline 24 of the spacing that be able to meet both installation positions more in addition, except the increase that causes cost of material, the operation that pipeline 24 is desired to be assembled between filter element 20 and the pneumatic control device 22 is also quite difficult, and the long problem of built-up time is arranged.

Therefore, the novel main purpose of this reality be to provide a kind of take up room little, and the low integrated secondary air feeder of cost.

According to above-mentioned purpose, major character of the present utility model is that the filter element of secondary air-supply device and pneumatic control device are integrally formed in the cylindrical shell, make and to enter by air inflow aperture and after filtration after the unit filtration when air, can directly control the size of air mass flow in the air chamber by pneumatic control device, and an amount of air flowed out by air outflow port, and can reach the purpose that reduces waste gas equally, more thereby can reduce object in the secondary air-supply device, to improve utilization of space in the Motor Vehicle, also can reduce simultaneously the pipeline that is communicated with each object, and effectively reach the purpose that reduces piping material cost and built-up time.

The secondary air-supply device of Motor Vehicle of the present utility model, it mainly comprises a filter element, and a pneumatic control device is characterized in that, also be provided with a cylindrical shell, it is hollow shape, and its inside is formed with an air chamber, a control room and a negative pressure chamber, air chamber has an air inflow aperture that is communicated with ambient atmosphere, the control room has an air outflow port, and negative pressure chamber is communicated with negative pressure conveying end between motor vehicle engine suction port and the Carburetor, and separates with a diaphragm and control room in addition;

Described filter element and pneumatic control device are arranged in the air chamber of described cylindrical shell; By the size of described diaphragm interlock with air mass flow in the control air chamber.

The secondary air-supply device of described Motor Vehicle, it is characterized in that, described cylindrical shell has a upper cover body that is fixedly arranged on described air chamber one end, and one be fixedly arranged on negative pressure chamber's one end and with the lower cover of described diaphragm clipping on cylindrical shell, upper cover body is outward extended with an air intake channel that is communicated with described air inflow aperture, and lower cover is outward extended with a negative pressure pipe that is communicated with described negative pressure chamber.

The secondary air-supply device of described Motor Vehicle is characterized in that, described filter element inside is formed with an air flue that is communicated with described control room.

The secondary air-supply device of described Motor Vehicle, it is characterized in that, described pneumatic control device includes an end and is connected in controlling rod on the described diaphragm, one be fixedly arranged on the control valve body of the controlling rod the other end and be arranged in control valve body and the internal face of control room apical margin between elastic component.

The secondary air-supply device of described Motor Vehicle, it is characterized in that, a place convexes with certain position ring on the control room internal face of described cylindrical shell in air, the also corresponding compacting ring that convexes with in described air chamber of described upper cover body, described filter element are arranged between the positioning ring in the compacting ring of described upper cover body and control room.

The secondary air-supply device of described Motor Vehicle is characterized in that, is folded with a pad between described filter element and the positioning ring in addition.

The secondary air-supply device of described Motor Vehicle is characterized in that, described pad is made by foam body.

Relevant technical characteristics of the present utility model will cooperate embodiment and accompanying drawing to be described in detail as follows:

The accompanying drawing simple declaration:

Fig. 1: the configuration schematic diagram of known secondary air-supply device;

Fig. 2: the assembled sectional view of preferred embodiment of the present utility model;

Fig. 3: the configuration schematic diagram of preferred embodiment of the present utility model;

Fig. 4: the user mode schematic representation of preferred embodiment of the present utility model.

At first, it is the assembled sectional view of preferred embodiment of the present utility model to see also Fig. 2, and the shown secondary air-supply device of present embodiment mainly includes a cylindrical shell 5, a filter element 6 and a pneumatic control device 7; Its middle cylinder body 5 is hollow shape, its inside is formed with an air chamber 50, one control room 52 and a negative pressure chamber 54, air chamber 50 has an air inflow aperture that is communicated with

ambient atmosphere

500,52 in control room has an air outflow port 520, and appropriate location convexes with a positioning ring 522 to air chamber 50 on the internal face in control room 52, and negative pressure chamber 54 is communicated with negative pressure conveying end (not shown) between motor vehicle engine suction port and the Carburetor, and separate with control room 52 with a diaphragm 540 in addition, simultaneously, cylindrical shell 5 has a upper cover body 56 that is fixedly arranged on air chamber 50 1 ends in addition, and one be fixedly arranged on negative pressure chamber's 54 1 ends and with the lower cover 58 of diaphragm 540 clippings on cylindrical shell 5, upper cover body 56 is outward extended with an air intake channel 560 that is communicated with air inflow aperture 500, also inside (promptly to air chamber 50) convexes with a compacting ring 562 simultaneously, and lower cover 58 then is outward extended with a negative pressure pipe 580 that is communicated with negative pressure chamber 54; Filter element 6 is made by the filter paper that volume is set as hollow tube-shape, it is arranged in the air chamber 50 of cylindrical shell 5, and between the compacting ring 562 of upper cover body 56 and control room 52 internal faces between the positioning ring 522 that air chamber 50 is convexly equipped with, and between filter element 6 and positioning ring 522, be folded with a pad 60 of making by sponge material in addition, filter element 6 can firmly be arranged in the air chamber 50 by the location of the compacting of suppressing ring 562 and positioning ring 522 respectively, in addition, 6 inside, filtering unit are formed with an air flue 62 that is communicated with control room 52 in addition; Be arranged in as for 7 of pneumatic control devices in the control room 52 of cylindrical shell 5, it includes an end and is connected in controlling rod 70 on the diaphragm 540, one is fixedly arranged on the elastic component 74 between the internal face of the control valve 72 of controlling rod 70 the other ends and control room 52 apical margins, so pneumatic control device 7 can be by the interlock of diaphragm 540 size with air mass flow in the in good time control air chamber 50.

As shown in Figure 3, it is the configuration schematic diagram of a preferred embodiment of the present utility model, and please cooperate simultaneously and consult Fig. 2, shown in the figure, present embodiment is integrally formed in the cylindrical shell 5 by filter element 6 and pneumatic control device 7, gets final product so can be disposed at an appropriate location on the car body 8 (present embodiment is disposed at foot treadle 80 front lower places of car body 8) as shown in Figure 3 and directly.

As shown in Figure 2, when engine moves, ambient air (being secondary air) at first flows into from the air intake channel 560 of last leaf body 56, air inflow aperture 500 via air chamber 50 enters in the air chamber 50 again, and by filter element 6 to filter after in the air flue 62 input control rooms 52, this moment is if throttle strengthens, the intake negative-pressure value that then Motor Vehicle produced is less, so negative pressure chamber 54 that is connected with motor vehicle engine chamber negative pressure pipe 81 via the negative pressure pipe 580 of lower cover 58, just can not make diaphragm 540 produce significantly action, at this moment, diaphragm 540 significantly interlock controlling rod 70 drives control valve bodies 72 compression elastic pieces 74 move to right to overcome its elastic force (or only interlock controlling rod 70 move to right a certain suitable degree), make a large amount of air to flow into control room 52, and flow out toward air outflow port 520 by the port 9 between control valve body 72 and control room 52 inwalls via the air flue 62 of filter element 6; Then via the conveying of pipeline 82, and by discharging in cylinder block gas port and outlet pipe ingress; When fresh air enters to the cylinder block gas port, in the time of between the outlet pipe inlet region, it will mix mutually with the high-temp waste gas of just discharging from cylinder, so, high-temp waste gas will carry out oxidation (effect of Yin Wendu high oxidation can be carried out) again with fresh air, make contained carbon monoxide and airborne combination with oxygen in the waste gas and become carbon dioxide, hydrocarbon contained in the waste gas then becomes water with airborne combination with oxygen, thereby the carbon monoxide of harmful human body and the content of hydrocarbon in the reduction waste gas, along with waste gas constantly goes out from emission by exhaust pipe, air will constantly flow into the cylinder outlet, the outlet pipe ingress, make the waste gas of discharging constantly to carry out oxidation by cylinder, so last waste gas of discharging from outlet pipe, the concentration step-down; As for the detailed action situation between the interior negative pressure that is produced between cylinder block gas port, outlet pipe inlet region, belong to prior art, so do not repeat them here.

Continuous its user mode schematic representation of Fig. 4 that sees also for the preferred embodiment of model utility, as shown in FIG., if after opening the throttle, loosen throttle, when making engine be in the oil return state, make relatively that then the intake negative-pressure value that Motor Vehicle produced is bigger, so the diaphragm 540 of negative pressure chamber 54 will produce more significantly motion, turn right compression elastic piece 74 to move bigger distance and drive controlling rod 70 interlock control valve bodies 72, make the port 9 between control valve body 72 and control room 52 inwalls become littler, even close, though make that relatively negotiable air reduces in the control room 52, so control room 52 is expelled to the cylinder block gas port, secondary air amount between the outlet pipe inlet region is just little or do not supply with, that is this moment, because of the exhaust gas discharged amount less, so in the cylinder institute exhaust gas discharged, contained harmful gas such as carbon monoxide, storages such as hydrocarbon are just low, therefore do not need too many air to carry out oxidation, simultaneously, and can effectively prevent because of negative pressure when big, oil-gas ratio regular meeting in the Carburetor is higher, if carry a large amount of fresh airs to the cylinder block gas port again, in between the outlet pipe inlet region, will produce after-burning (being gas explosion) phenomenon at outlet pipe.

As shown in Figure 3, as can be known via above explanation, present embodiment except with known secondary air-supply device equally can be at the cylinder block gas port, the outlet pipe inlet is supplied with a cleaning, the air that flow is suitable, so that just can carry out oxidation again with fresh air from the high-temp waste gas of cylinder discharge, and then make in the waste gas the contained harmful gas such as the content of carbon monoxide and hydrocarbon etc. to effectively reduce, thereby can reach and make waste gas when emission by exhaust pipe is to atmosphere, be unlikely the severe exacerbation air quality, more can be integrally formed in the cylindrical shell 5 with pneumatic control device 7 by its filter element 6, an appropriate location gets final product on the car body 8 and can directly be disposed at as shown in FIG., therefore just increasing relatively can be for the space that utilizes in the Motor Vehicle, to improve utilization of space in the Motor Vehicle, simultaneously also do not need between filter element 6 and pneumatic control device 7, to set up pipeline again, and can effectively reach the purpose that reduces pipeline cost and built-up time.

As shown in the above description, the utility model is compared with existing same device and is had following effect:

(1) utilization rate in space in the raising motor vehicle:

The utility model since with the filter element of secondary air-supply device with Pneumatic control device is integrally formed in the cylindrical shell, is therefore wanting to be disposed at car When suitably locating on the body, only need consider that space, a place gets final product, and needn't be as known Secondary air-supply device is still needed and is considered space, two places, and filter element and sky Also do not need to connect again any pipeline between the gas control device processed, can enlarge again simultaneously Can for the space that utilizes, improve space profit in the motor vehicle and reach in the motor vehicle Purpose with efficient.

(2) reduce piping material cost and built-up time:

Because this creation is filter element and sky with secondary air-supply device Gas control device processed is integrally formed in the cylindrical shell, and do not need in filter element with Connect any pipeline between the pneumatic control device, thereby can save pipeline and make The material cost and the built-up time that become.

Claims

1, a kind of secondary air-supply device of Motor Vehicle, it mainly comprises a filter element, and a pneumatic control device is characterized in that, also be provided with a cylindrical shell, it is hollow shape, and its inside is formed with an air chamber, a control room and a negative pressure chamber, air chamber has an air inflow aperture that is communicated with ambient atmosphere, the control room has an air outflow port, and negative pressure chamber is communicated with negative pressure conveying end between motor vehicle engine suction port and the Carburetor, and separates with a diaphragm and control room in addition;

2, the secondary air-supply device of Motor Vehicle according to claim 1, it is characterized in that, described cylindrical shell has a upper cover body that is fixedly arranged on described air chamber one end, and one be fixedly arranged on negative pressure chamber's one end and with the lower cover of described diaphragm clipping on cylindrical shell, upper cover body is outward extended with an air intake channel that is communicated with described air inflow aperture, and lower cover is outward extended with a negative pressure pipe that is communicated with described negative pressure chamber.

3, the secondary air-supply device of Motor Vehicle according to claim 1 is characterized in that, described filter element inside is formed with an air flue that is communicated with described control room.

4, the secondary air-supply device of Motor Vehicle according to claim 1, it is characterized in that, described pneumatic control device includes an end and is connected in controlling rod on the described diaphragm, one be fixedly arranged on the control valve body of the controlling rod the other end and be arranged in control valve body and the internal face of control room apical margin between elastic component.

5, the secondary air-supply device of Motor Vehicle according to claim 2, it is characterized in that, a place convexes with certain position ring on the control room internal face of described cylindrical shell in air, the also corresponding compacting ring that convexes with in described air chamber of described upper cover body, described filter element are arranged between the positioning ring in the compacting ring of described upper cover body and control room.

6, according to the secondary air-supply device of the described Motor Vehicle of claim 5, it is characterized in that, be folded with a pad between described filter element and the positioning ring in addition.

7, the secondary air-supply device of Motor Vehicle according to claim 6 is characterized in that, described pad is made by foam body.