CN101852150A

CN101852150A - Three-way pipe used in control pipelines for evaporation emission of fuel oil

Info

Publication number: CN101852150A
Application number: CN 201010182557
Authority: CN
Inventors: 张俊; 戴军昌
Original assignee: Chongqing Longxin Engine Co Ltd
Current assignee: Chongqing Longxin Engine Co Ltd
Priority date: 2010-05-25
Filing date: 2010-05-25
Publication date: 2010-10-06
Anticipated expiration: 2030-05-25
Also published as: CN101852150B

Abstract

The invention provides a three-way pipe used in control pipelines for evaporation emission of fuel oil, wherein two branch pipes form a double-head end of the three-way pipe; the orientating direction of the two branch pipes of the double-head end is opposite to that of a branch pipe of a single-head end; a baffle plate is arranged in an inner cavity at the intersection of the three branch pipes and is positioned between interfaces of inner cavities of the two branch pipes of the double-head end; and the bottom of an inner cavity of the branch pipe of the single-head end is lower than the bottoms of the inner cavities of the two branch pipes of the double-head end. By adopting the technical scheme of the invention, the control pipelines for the evaporation emission of the fuel oil can be arranged on a car frame more normatively and compact, the used pipe lamps are fewer, and the cost is reduced; and simultaneously, air blockages caused by fuel oil aggregation in the three-way pipe can be avoided effectively.

Description

The three-way pipe that is used for control pipelines for evaporation emission of fuel oil

Technical field

The present invention relates to a kind of three-way pipe, in particular for the three-way pipe in the control pipelines for evaporation emission of fuel oil.

Background technique

Existing Pollutant of Evaporated Gasoline Vehicle emission control systems mainly includes charcoal jar, suction tude, outlet pipe and negative pressure pipe; suction tude is connected between charcoal jar and the fuel tank; outlet pipe and negative pressure pipe are connected between charcoal jar and the Carburetor, and the toppling valve that the gasoline in the fuel tank when preventing that vehicle from toppling over enters into the charcoal jar usually also is installed on the suction tude.On motorcycle, the charcoal jar is fixedly mounted on the vehicle frame, and suction tude, outlet pipe and negative pressure pipe are generally flexible pipe, because mounted component is more on the vehicle frame, compact structure, above-mentioned flexible pipe is difficult to assurance and bending do not occur in the use, suction tude especially, and the user who has is the dismounting of fuel tank for convenience, suction tude can be extended, suction tude behind the lengthening is positioned on the vehicle frame pell-mell, and the bending part in suction tude just gathers fuel oil easily like this, causes the suction tude stuffiness.Particularly now in order to adapt to national fuel evaporation standard, the fuel tank cap of fuel tank is totally enclosed at ordinary times, the fuel tank inner chamber is to rely on the free vent on the charcoal jar to communicate with atmosphere under the normal condition, to keep the air pressure balance in the fuel tank, guarantee to start the normal oil-feed of function, if suction tude is obstructed, then uneven negative pressure can appear in the top of oil level in the fuel tank, cause the motor oil-feed not smooth, will cause engine misses when serious, influence the normal reliable work of motor.

For avoiding occurring the problems referred to above, someone is close to fuel tank on suction tude position utilizes three-way pipe to add a Non-return air valve, be equivalent to increase a path that allows fuel tank communicate with atmosphere, even therefore suction tude near this section of charcoal jar by fuel oil or owing to other reason has been stopped up, perhaps the free vent of charcoal jar is blocked, fuel tank still can keep communicating by Non-return air valve and atmosphere, makes the negative pressure in the fuel tank can keep balance all the time, guarantees that the motor oil-feed is smooth and easy and working properly.

But, existing above-mentioned three-way pipe inner chamber is simple pipeline jointing construction in three pipe intersections, liquid can be ganged up in three arms mutually, when three-way pipe makes it when the arm at Non-return air valve place tilts putting on the vehicle frame, a little liquid gasoline of coming from suction tude under some situation can form gathering through three pipe intersections the arm at Non-return air valve place, will have influence on the normal ventilation performance of Non-return air valve after how having assembled.In addition, existing three-way pipe is generally the integral molded plastic profiled member, and three arms are respectively towards different directions, after connecting top hose, cause line arrangement in disorder easily, influence the unobstructed property of pipeline inside, pipe clamp quantity in order to fixing sebific duct is also more, is unfavorable for the cost control of car load.

Summary of the invention

The purpose of this invention is to provide a kind of three-way pipe that is used for control pipelines for evaporation emission of fuel oil that in pipeline, is not easy to cause the air obstruction.

For achieving the above object, the invention provides a kind of three-way pipe that is used for control pipelines for evaporation emission of fuel oil, in three arms that are connected as a single entity, wherein two arms constitute the double end end of three-way pipe, double end end two arms and single head end arm towards opposite, inner chamber three arm intersections is provided with baffle plate, and baffle plate is between the interface of two tube cavities of double end end, and the bottom that the single head end props up tube cavity is lower than the bottom of two tube cavities of double end end.

The present invention is by being provided with baffle plate in the inner chamber of three arm intersections, can block liquid gasoline and enter into the arm that another is connected with Non-return air valve from the wherein arm of double end end, avoided gasoline to assemble in this arm and the air that causes stops up.The bottom that the single head end props up tube cavity is lower than the bottom of two tube cavities of double end end, make from the double end end wherein the arm liquid gasoline of coming can enter into smoothly in the single head end arm, and be unlikely to enter into the arm that is connected with Non-return air valve.

Further, between the upper end of baffle plate and internal chamber wall, leave the gap, baffle plate is played stop the effect of liquid gasoline, but unaffected to the ventilation between double end end two arms.

Further, two arms of double end end are parallel to each other, and the pipeline that is attached thereto just can be arranged at the enterprising professional etiquette model of vehicle frame along a direction, makes pipeline be unlikely to too in disorder, helps to guarantee that pipeline inside is unobstructed.

Further, the bottom of intersection's inner chamber is provided with the groove with single head end arm intracavity inter-connection, further plays down water conservancy diversion.

Further, double end end two arms are made the structure that is fastened and connected as a whole and that single head end arm matches in intersection's employing end face convex-concave, employing welding or bonding, and relative snapping after the moulding of employing two-part difference, technology is easy to realization.

Further, the double end end wherein be equipped with Non-return air valve on the arm, be assemblied on the three-way pipe Non-return air valve is compound, no longer utilize other flexible pipe to connect Non-return air valve, make compact structure, reliable operation.

Adopt technological scheme of the present invention, effectively avoided three-way pipe, can make the layout of control pipelines for evaporation emission of fuel oil on vehicle frame standard more simultaneously because of the air that fuel oil aggregation causes stops up, compactness, used pipe clamp is few, has reduced cost.

Description of drawings

Fig. 1 is the three-way pipe structure schematic representation of the embodiment of the invention;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the perspective exploded view of three-way pipe in the embodiment of the invention;

Fig. 4 is the perspective exploded view of three-way pipe when another orientation is watched in the embodiment of the invention;

Among the figure: 1. first arm; 2. second arm; 3. the 3rd arm; 4. baffle plate; 5. groove; 6. Non-return air valve; 7. gap.

Embodiment

The invention will be further described below in conjunction with drawings and Examples.

As shown in Figures 1 to 4, the three-way pipe that is used for control pipelines for evaporation emission of fuel oil, have three arms that are connected as a single entity, be respectively first arm 1, second arm 2 and the 3rd arm 3, wherein first arm 1, second arm 2 constitute the double end end of three-way pipe, and the 3rd arm 3 is the single head end of three-way pipe, double end end two arms and single head end arm towards opposite, inner chamber three arm intersections is provided with baffle plate 4, and baffle plate 4 is between the interface of two tube cavities of double end end.Baffle plate 4 can block liquid gasoline and enter into the arm that another is connected with Non-return air valve from the wherein arm of double end end, has avoided gasoline to assemble in this arm and the air that causes stops up.The bottom that the single head end props up tube cavity is lower than the bottom of two tube cavities of double end end, make from the double end end wherein the arm liquid gasoline of coming can enter into smoothly in the single head end arm, and be unlikely to enter into the arm that is connected with Non-return air valve.

As shown in Figure 1, leave gap 7 between the upper end of baffle plate 4 and the internal chamber wall, make baffle plate 4 play the effect that stops liquid gasoline, but unaffected to the ventilation between double end end two arms.

As Fig. 1, Fig. 3, shown in Figure 4, double end end two arms are that first arm 1 and second arm 2 are parallel to each other, and the pipeline that is attached thereto just can be arranged at the enterprising professional etiquette model of vehicle frame along a direction, make pipeline be unlikely to too in disorder, helps to guarantee that pipeline inside is unobstructed.

As shown in Figure 4, the bottom of intersection's inner chamber is provided with the groove 5 with single head end arm intracavity inter-connection, and the liquid gasoline that 5 pairs of grooves enter in the single head end arm further plays down water conservancy diversion.

Referring to Fig. 1 to Fig. 4, double end end two arms are made the structure that is fastened and connected as a whole and that single head end arm matches in intersection's employing end face convex-concave, employing welding or bonding, and relative snapping after the moulding of employing two-part difference, technology is easy to realization.

Referring to Fig. 1 to Fig. 4, on a wherein arm of double end end, be equipped with Non-return air valve 6, be assemblied on the three-way pipe Non-return air valve is compound, no longer utilize other flexible pipe to connect Non-return air valve, make compact structure, reliable operation.

In control pipelines for evaporation emission of fuel oil, adopt three-way pipe of the present invention, effectively avoided three-way pipe because of the air that fuel oil aggregation causes stops up, can also make the layout of pipeline on vehicle frame that be attached thereto standard more simultaneously, compactness, used pipe clamp is few, has reduced cost.

Claims

1. three-way pipe that is used for control pipelines for evaporation emission of fuel oil, comprise three arms that are connected as a single entity, wherein two arms constitute the double end end of three-way pipe, double end end two arms and single head end arm towards opposite, it is characterized in that: the inner chamber three arm intersections is provided with baffle plate, baffle plate is between the interface of two tube cavities of double end end, and the bottom that the single head end props up tube cavity is lower than the bottom of two tube cavities of double end end.

2. be used for the three-way pipe of control pipelines for evaporation emission of fuel oil according to claim 1, it is characterized in that: leave the gap between the upper end of described baffle plate and the internal chamber wall.

3. be used for the three-way pipe of control pipelines for evaporation emission of fuel oil as claimed in claim 1 or 2, it is characterized in that: two arms of described double end end are parallel to each other.

4. as being used for the three-way pipe of control pipelines for evaporation emission of fuel oil as described in the claim 3, it is characterized in that: described intersection intracavity bottom is provided with the groove with single head end arm intracavity inter-connection.

5. as being used for the three-way pipe of control pipelines for evaporation emission of fuel oil as described in the claim 4, it is characterized in that: described double end end two arms are made the as a whole structure that is fastened and connected that adopts the end face convex-concave to match in intersection with single head end arm.

6. as being used for the three-way pipe of control pipelines for evaporation emission of fuel oil as described in the claim 5, it is characterized in that: wherein be equipped with Non-return air valve on the arm at the double end end.