CN201078257Y

CN201078257Y - Auxiliary air leading-in apparatus of locomotive exhaust pipe

Info

Publication number: CN201078257Y
Application number: CNU2007201288473U
Authority: CN
Inventors: 曾鸿志
Original assignee: SHANGHAI ZHAOHUI TECHNOLOGY Co Ltd
Current assignee: SHANGHAI ZHAOHUI TECHNOLOGY Co Ltd
Priority date: 2007-08-21
Filing date: 2007-08-21
Publication date: 2008-06-25
Anticipated expiration: 2017-08-21

Abstract

The utility model relates to a secondary air inducting device of an engine air exhaust pipe. A secondary-air supply pipe is arranged on an waste gas exhaust pipe between an engine and a silencer and is communicated with an air cleaner, an air chamber communicated to the outside atmosphere is disposed at an external side of the engine, a cooling fin, which can rotate with the engine power, is positioned in the air chamber and at the same time, the secondary-air supply pipe extends to the air cleaner to communicate with the air chamber; therefore, air is driven by a fan to enter into the secondary-air supply pipe, and then is led by the air cleaner to a silencer or the air exhaust pipe and the silencer, so as to promote the flow rate of the secondary-air supply pipe to the secondary air and the air exhaust pipe, and accordingly, the efficiency of harmful substances purification by the catalyst in the air exhaust pipe or the silencer can be promoted.

Description

The secondary air lead-in device of locomotive outlet pipe

Technical field

The utility model relates to locomotive, is meant especially a kind ofly to enter device in outlet pipe and the baffler in order to the guiding secondary air.

Background technique

The conventional locomotive engine is in order to reduce the harmful matter in the discharging waste gas, Catalytic Converter (Catalytic Converter) can be set in outlet pipe or baffler, utilize and contain platinum (Pt), palladium (Pd) and rhodium precious metal compositions such as (Rh) in the catalyst, harmful carbon monoxide (CO) and hydrocarbon (HC) are oxidized to harmless carbon dioxide (CO ₂) and water (H ₂O); And with harmful nitrogen oxide (NO _x) be reduced into harmless nitrogen (N ₂) and oxygen (O ₂).

For the harmful matter that is beneficial in above-mentioned catalyst and the waste gas is carried out oxidation and reduction reaction, disclosed the technology that in outlet pipe, imports secondary air in the prior art, a SAS Secondary Air Supply pipe is set on the front exhaust pipe of Catalytic Converter, be connected with an air-strainer, and air-strainer communicates with ambient atmosphere, be connected in series an open type control valve on the supply tube simultaneously, tool one negative pressure pipe is connected between Carburetor and the engine air admittance pipe on the valve; In view of the above, the intermittent negative pressure that in outlet pipe, is produced when utilizing engine running, extraneous fresh air (being secondary air) is sucked in the outlet pipe via the SAS Secondary Air Supply pipe, increase the oxygen content in the waste gas, promote the efficient of catalyst oxidizing carbon monoxide and hydrocarbon; In addition, when the rider loosens throttle (oil return) because of deceleration moment in locomotive driving, this control valve can be accepted the driving of the intermittent negative pressure that produces between Carburetor and engine air admittance pipe and moment is closed valve, and then in the intermittent blocking-up secondary air importing outlet pipe, can prevent outlet pipe generation afterburning.

In the above-mentioned prior art, only utilize the negative pressure in the outlet pipe to attract ambient air to enter the SAS Secondary Air Supply pipe, the flow that causes SAS Secondary Air Supply pipe guiding ambient air to enter in outlet pipe and the baffler is slightly inadequate, can influence the efficient of harmful matter in the catalytic control waste gas, improvement in urgent need of strengthening.

Summary of the invention

Main purpose of the present utility model provides a kind of secondary air lead-in device of locomotive outlet pipe, and it can promote the SAS Secondary Air Supply pipe and import the flow of secondary air to outlet pipe.

For reaching above-mentioned purpose, the utility model provides a kind of secondary air lead-in device of locomotive outlet pipe, it establishes a SAS Secondary Air Supply pipe on the waste gas exhaust pipe between engine and the baffler, be connected with an air-strainer, the engine outside has the air chamber of a connection ambient atmosphere, establish a cooling fan with engine power activation rotation in the air chamber, the SAS Secondary Air Supply pipe extends to described air chamber from air-strainer and is connected, enter in the SAS Secondary Air Supply pipe by the fans drive air, and import in baffler or outlet pipe and the baffler via air-strainer.

The secondary air lead-in device of locomotive outlet pipe as mentioned above, wherein SAS Secondary Air Supply Guan Shangjie establishes a control valve that is used to open and close air ventilation.

The secondary air lead-in device of locomotive outlet pipe as mentioned above, wherein control valve is an open type, has a negative pressure pipe that is connected with the engine air admittance pipe, drive control valve closes valve when responding to the engine negative pressure greater than a negative pressure definite value, enter outlet pipe with the blocking-up air, and drive control valve is driven valve when responding to the engine negative pressure less than this negative pressure definite value, enters outlet pipe with direct air.

The secondary air lead-in device of locomotive outlet pipe as mentioned above wherein is situated between on the suction tude and establishes a Carburetor, and the negative pressure pipe is communicated on the suction tude between engine and the Carburetor.

The secondary air lead-in device of locomotive outlet pipe as mentioned above, the air throttle that the fuel feeding engine is connected is established in the also replaceable one-tenth spray of wherein said Carburetor.

The secondary air lead-in device of locomotive outlet pipe as mentioned above wherein on the SAS Secondary Air Supply pipe between control valve and the outlet pipe, is situated between and establishes the one-way valve of a waste gas adverse current from outlet pipe capable of blocking.

By adopting technique scheme, the utility model drives air by the cooling fan that uses the engine outside and enters in the SAS Secondary Air Supply pipe, imports the flow of secondary air to outlet pipe thereby can promote the SAS Secondary Air Supply pipe.

For in detail the utility model being described in detail more, enumerate preferred embodiment and description of drawings as back:

Description of drawings

Fig. 1: the configuration schematic diagram that discloses a preferred embodiment of the present utility model.

Fig. 2: the flow chart that discloses guiding secondary air of the present utility model.

Fig. 3: the flow curve figure that discloses secondary air of the present utility model.

Fig. 4: the configuration schematic diagram that discloses another preferred embodiment of the present utility model.

Embodiment

At first as shown in Figure 1, disclose the configuration schematic diagram of secondary air lead-in device one preferred embodiment of the utility model locomotive outlet pipe, illustrate that the utility model establishes a SAS Secondary Air Supply pipe 4 on the waste gas exhaust pipe 22 between locomotive engine 1 and the baffler 3, be connected with an air-strainer 5, and engine 1 outside is provided with one and is communicated with the air chamber 11 of ambient atmosphere, and establishes a cooling fan 12 with engine power activation rotation in air chamber 11.

Be situated between on this SAS Secondary Air Supply pipe 4 and establish an open type control valve 6 that can open and close air ventilation, has a negative pressure pipe 61 that is connected with engine 1 suction tude 21, drive control valve 6 closes valve in the time of responding to engine 1 negative pressure greater than a negative pressure definite value, enter outlet pipe 22 with the blocking-up air, and can when responding to engine 1 negative pressure, drive valve by drive control valve 6 less than this negative pressure definite value, enter outlet pipe 22 with direct air;

On the SAS Secondary Air Supply pipe 4 between this control valve 6 and the outlet pipe 22, be situated between and establish the one-way valve 7 of an air from outlet pipe 22 capable of blocking; Be situated between in this outlet pipe 22 or the baffler 3 and establish at least one Catalytic Converter 31; Be situated between on this suction tude 21 and establish a Carburetor 8, and negative pressure pipe 61 is communicated on the suction tude 21 between engine 1 and the Carburetor 8.

In addition, the air throttle that the fuel feeding engine is connected is established in the also replaceable one-tenth spray of above-mentioned Carburetor 8.

According to above-mentioned enforcement environment, the utility model extends to SAS Secondary Air Supply pipe 4 with the air chamber 11 of this engine 1 from air-strainer 5 and is connected.

In more concrete enforcement, SAS Secondary Air Supply pipe 4 one ends of the present utility model form an inlet end 41 that is connected with air chamber 11, and the other end forms an outlet side 42 that is connected with outlet pipe 22.

Composition by above-mentioned member, can particularly when engine 1 activates running (as shown in Figure 1), can drive fan 12 and together turn round for implementing the utility model according to this, can attract ambient air to enter and circulation in air chamber 11, use the high temperature that is produced when reducing engine 1 running; Simultaneously, can in outlet pipe 22, produce intermittent negative pressure by engine 1 running; At this moment, be full of the gas pressure that air produced in air chamber 11, can drive the inlet end 41 that air enters SAS Secondary Air Supply pipe 4, and the suction that produced in the outlet sides 42 of engine negative pressure to SAS Secondary Air Supply pipe 4 in the cooperation outlet pipe 22, cause air to enter inlet end 41 (cooperating shown in Figure 2) from air chamber 11 (91), and along the filtration of SAS Secondary Air Supply pipe 4 by air-strainer 5 (92), and import in the outlet pipe 22 by control valve 6 (93) and one-way valve 7 (94), enter in the baffler 3 (95) along outlet pipe 22 again, use the oxygen content in the waste gas that increases in outlet pipe 22 and the baffler 3, the efficient of carbon monoxide and hydrocarbon in the catalyst oxidation gaseous effluent on the promotion Catalytic Converter 31.During this period, one-way valve 7 can be blocked pressure-driven waste gas adverse current in the outlet pipe 22 to SAS Secondary Air Supply pipe 4.

In addition, the outlet side 42 of this SAS Secondary Air Supply pipe 4 also can directly be communicated in the baffler 3 (as shown in Figure 4).

See also shown in Figure 3, disclose and use and do not use engine 1 fan 12 to force to import the flow curve figure of secondary air, illustrate the utility model with the multi-section air displacement between 50 to 200C.C. locomotive engine, carry out real vehicle and measure the back discovery, use engine 1 fan 12 to force to import the locomotive of secondary airs to outlet pipe 22 and the baffler 3, when the speed of a motor vehicle was in the scope of 15～65 (km/hr), the flow that secondary air imports outlet pipe 22 obviously promoted 5～15 (l/min).In view of the above, import the flow of secondary airs, and then promote the efficient of harmful matter in the catalytic control waste gas in outlet pipe 22 or the baffler 3 to outlet pipe 22 to promote SAS Secondary Air Supply pipe 4.

In addition, close (as spraying the air throttle that the fuel feeding engine is connected) owing to the delivery volume that has noticeable degree oil gas in the Carburetor 8, when the rider loosens throttle (oil return) because of deceleration moment in locomotive driving, this control valve 6 can drive by the intermittent negative pressure that negative pressure pipe 61 is accepted to produce in the suction tude 21 of 1 in Carburetor 8 and engine, in negative pressure during greater than this negative pressure definite value moment close valve, and then in the intermittent blocking-up secondary air importing outlet pipe 22, can prevent that outlet pipe 22 from afterburnings taking place.

In sum, only be preferable exemplifying embodiment of the present utility model, be not in order to limit the utility model; All other do not break away from equivalence of the present utility model to be modified or displacement, all should be contained in the utility model scope.

Claims

1. the secondary air lead-in device of a locomotive outlet pipe, on the waste gas exhaust pipe between engine and the baffler, establish a SAS Secondary Air Supply pipe, be connected with an air-strainer, the engine outside has the air chamber of a connection ambient atmosphere, establish a cooling fan with engine power activation rotation in the air chamber, it is characterized in that:

The SAS Secondary Air Supply pipe extends to described air chamber from air-strainer and is connected.

2. the secondary air lead-in device of locomotive outlet pipe according to claim 1 is characterized in that: wherein SAS Secondary Air Supply Guan Shangjie establishes a control valve that is used to open and close air ventilation.

3. as the secondary air lead-in device of locomotive outlet pipe as described in the claim 2, it is characterized in that: wherein control valve is an open type, has a negative pressure pipe that is connected with the engine air admittance pipe.

4. as the secondary air lead-in device of locomotive outlet pipe as described in the claim 3, it is characterized in that: wherein be situated between on the suction tude and establish a Carburetor, the negative pressure pipe is communicated on the suction tude between engine and the Carburetor.

5. as the secondary air lead-in device of locomotive outlet pipe as described in the claim 3, it is characterized in that: wherein be situated between on the suction tude and establish a spray and establish the air throttle that the fuel feeding engine is connected, the negative pressure pipe is communicated on the suction tude between engine and the air throttle.

6. the secondary air lead-in device of locomotive outlet pipe according to claim 1 is characterized in that: wherein on the SAS Secondary Air Supply pipe between control valve and the outlet pipe, be situated between and establish an one-way valve that is used to block from the waste gas adverse current of outlet pipe.