CN2127745Y

CN2127745Y - Cam control Venturi carburettor

Info

Publication number: CN2127745Y
Application number: CN 92225266
Authority: CN
Inventors: 王明卿
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-06-24
Filing date: 1992-06-24
Publication date: 1993-03-03
Anticipated expiration: 2002-06-24

Abstract

The utility model relates to a cam control venturi carburettor, particularly a carburettor for controlling the change of a venturi by making use of the curved surface of a cam. The carburettor body of the utility model is composed of a front seat, a body and a rear seat, wherein, the utility model comprises a changeable venturi which is controlled by a cam, a main air door which is matched with the changeable venturi mechanism and a reinforced system. The utility model also comprises a delay valve which is vacuum controlled by an engine, an automatic choke horsepower adjusting mechanism, an idle speed oil piping system, etc. The purpose of the utility model is to provide a carburettor which saves oil consumption, reduces exhaust emission and has strong climbing power.

Description

Cam control Venturi carburettor

The utility model belongs to traffic and transport field, relates to a kind of Carburetor, particularly a kind of cam control Wen tubular type Carburetor.

The function series of Carburetor (also claiming vaporizer) is at the mixed steam of supply proper proportion, required with the various different operating situations of answering engine.In the general Carburetor Venturi tube is arranged,, increase the generation pull of vacuum, the oil spout of oil nozzle is sucked, make gasoline vaporising and air mixing at the flow velocity of Venturi tube larynx place air when air stream during through Venturi tube.Though traditional Carburetor adopts heavy wool road system, because of it is fixed Venturi tube, is difficult to provide an amount of oil gas and oil gas mixing ratio so design, and satisfies the needs under any rotating speed of engine, reaches perfect combustion and fuel-efficient purpose.

The purpose of this utility model is to provide a kind of structure-improved in conjunction with changable type Venturi tube and traditional Carburetor, to reach fuel-efficient, horsepower big and oligosaprobic usefulness.

The utility model is achieved through the following technical solutions: a kind of cam control Wen Shiguanshi Carburetor comprises by front stall, body and back seat constituting the main body of Carburetor and the floating drum oil circuit of bottom.This Carburetor comprises that also the variable Venturi's pipe mechanism, that utilizes cam control cooperates the main air door of variable Venturi's pipe mechanism and powerful subsidy oil-way system, to utilize the vacuum controlled vacuum control delay valve of engine, auto chock horsepower controlling mechanism and an idling oil-way system.

The utility model not only has the fuel-efficient effect of variable Venturi's pipe, and the advantage of also possessing traditional Carburetor adds auto chock horsepower controlling mechanism, makes it fuel-efficient and horsepower is big.And acting on of vacuum transmitting valve travelled in the crowded city, more can reduce brake and throttle when loosening rapidly oil consumption and the pollution of waste gas.The design of idling oil-way system then can provide the stable of idling, the effect of performance perfect combustion, and the discharge capacity of waste gas reduces when making idling.

The utility model is described in further detail below in conjunction with accompanying drawing.

Description of drawings:

Fig. 1 the utility model front section view

Fig. 2 vacuum control delay valve section plan

Fig. 3 the utility model rear view

The A-A sectional view of Fig. 4 Fig. 3

The amplification section plan of Fig. 5 idling oil-way system

The amplification section plan of another angle of Fig. 6 idling oil-way system

Fig. 7 the utility model stereo appearance figure

(1) front stall (2) body (3) back seat (4) variable Venturi's pipe

(5) main air door (6) float chamber (7) floating drum (8) cam

(9) rotating shaft (10) lid (11) lid (12) upper shield

(13) body (14) contiguous block (15) oil resistance pin

(16) idling oil circuit overfall main body (17) screw

(18) oil resistance pin jump ring (19) pintle valve seat (20) needle-valve

(21) pivot (22) O type ring (23) pipe (24) emulsification pipe fitting

(25) powerful oil circuit emulsion tube (26) spring housing (27) the O type ring of subsidizing

(28) oil resistance pin return spring (29) fixing spring (30) connecting rod

(31) cylinder block (32) push rod (33) base (34) joint

(35) steel ball (36) spring (37) O type ring (38) matrix rubbermeter

(39) packing ring (40) locating stud (41) O type ring (42) tubulose chock plate

(43) cam (44) roller (45) vacuum valve (46) driving cam

(47) connecting rod (48) oil inlet pipe (49) idling oil circuit emulsion tube

(50) fuel tap body (51) oil resistance pin (52) upper cover body (53) O type ring

(54) spring (55) connecting rod (56) chute (57) cable wire

(60) oil outlet (61) oil outlet (62) ventilating hole (63) ventilating hole

(44) hole, inlet hole (65) escape hole (66) hole (67)

(68) hole, hole (69)

Accompanying drawing 1-7 has showed an embodiment of the present utility model.

The utility model is by front stall (1), body (2) and back seat (3) constitute the main body of Carburetor, therebetween and be provided with the O type ring (22) of leakproof, (27), wherein front stall (1) design has a chute (56), can place a variable Venturi's pipe (4) in the chute (56), variable Venturi's pipe (4) is gone up and is connected a connecting rod (30), two sides are established return spring (54), hold with a lid (10) lid, spring (54) is fixed in the chute (56), variable Venturi's pipe (4) is by the fixing cam (8) of a running shaft (9), the curved surface that holds cam (8) with the top of connecting rod (30) is controlled it and is changed vacuum up and down, with according to the sucking-off of engine actual demand an amount of oil gas and wellatomized oil-gas ratin, reach perfect combustion and fuel-efficient purpose.The design of one main oil outlet (60) is wherein arranged, by front stall (1) and body (2) and gap of setting when cooperating, between the about 0.1mm-0.15mm of its size, its Fuel System is provided by 2 emulsion tubes (24) that are installed in front stall (1) bottom that communicate with float chamber (6), good because of the oil gas atomizing that oil outlet (60) is discharged, the following atomizing oil gas of 0.15mm can reach the purpose of perfect combustion in theory.

The working connection of being controlled by variable Venturi's pipe (4), mainly be after when driving, quickening to finish, keep the oil gas supply of this speed during constant-speed traveling, because variable Venturi's pipe (4) can be changed by the curve of cam (8), under the collocation with the main air door (5) on the back seat (3), obtain the oil gas and the oil-gas ratio of optimal dose, the fuel-economizing situation when making constant-speed traveling more can effectively be brought into play.

The utility model is provided with one in addition and quickens pumping, and when anxious the acceleration, fuel oil can be by pipe (23) ejection, and when making anxious the acceleration, driving can have smooth and easy sense.

The utility model main air door and powerful subsidy oil-way system (as shown in Figure 1) mainly include a main air door (5), oil resistance pin (15), contiguous block (14), oil resistance pin return spring (28), oil resistance pin jump ring (18) and powerful subsidy oil circuit emulsion tube elements such as (25) and form.Main air door (5) wherein is fixed on the back seat (3), run through oil resistance pin (15) on the main air door (5), oil resistance pin (15) is matched with an oil resistance pin jump ring (18) and is connected with cable wire (57) with a contiguous block (14), contiguous block (14) upper end is provided with the ccontaining oil resistance pin return spring (28) of a spring housing (26), the oil resistance pin reply spring (28) upper end then lid to hold lid (11), upper shield (12) and body (13) fixing.

When quickening and the powerful horse-power-hour of high load needs, draw back when setting the position by the main air door (5) on the back seat (3), oil resistance pin (15) leaves oil outlet (61) by cable wire (57) contiguous block (14) pulling and compression oil resistance pin return spring (28), the oil gas that powerful subsidy oil circuit emulsion tube this moment (25) is provided begins to play a role, and the spindle gradient of oil resistance pin, then set according to satisfying the required oil and gas content of engine, when therefore the oil and gas content of emitting when variable Venturi's pipe (4) working connection is restricted, brute force subsidy oil circuit by main air door (5), required oil gas then is provided in good time, makes engine keep powerful horsepower.

The utlity model has an auto chock horsepower controlling mechanism, when when climbing or pin are loaded when big, the engine vacuum reduces, this moment, one tubulose chock plate (42) (as shown in Figure 4) began effect, close the ventilating hole (62) that leads to powerful subsidy oil circuit emulsion tube (25) and close towards idling oil circuit emulsion tube (49) ventilating hole (63), the air inflow of the pore of idling oil circuit and powerful oil circuit emulsion tube (49), (25) is restricted at this moment, the oil gas of being emitted has energy increasing function, with the deficiency of compensation moment acceleration and high load oil gas.Tubulose chock plate (42) one ends connect cam (43), be connected with vacuum valve (45) with connecting rod (47), be combined with a roller (44) on the cam (43), roller (44) is to be connected in running shaft driving cam (46) with connecting rod (55), what will specify at this is that tubulose chock plate (42) begins to do the time spent, its closed position is subjected to the restriction of the curve and the roller (44) (as shown in Figure 3) of cam (43) in addition, the needs of engine can just be satisfied in the position that tubulose chock plate (42) is closed, because the excessive oil consumption of choke is big, horsepower also is difficult for performance, it is not enough that the choke deficiency is then emitted oil gas, horsepower is also influenced, therefore, by a vacuum valve (45), connecting rod (47), cam (43), roller (44), the driving cam of running shaft (46), the member that connecting rod (55) and tubulose chock plate (42) are formed is an effective auto chock horsepower controlling mechanism, also is one of characteristics of the present utility model.

Moreover, as shown in Figure 1, in the utility model Carburetor bottom is a floating drum oil circuit by float chamber (6), floating drum (7), pintle valve seat (19), needle-valve (20) and pivot elements such as (21) formation, its function keeps quantitatively the gasoline that enters in the Carburetor float chamber (6), and the gasoline that stores is supplied to other oil circuits, therefore the floating drum oil circuit belongs to located by prior art, is not the category of the utility model claim, so do not giving unnecessary details.

The utility model Carburetor is provided with (as shown in Figure 2) engine vacuum control delay valve, its effect is to postpone the Venturi tube return, reduce when brake or air door return, postpone variable Venturi's pipe (4) the return time, when reduction brake of minimizing fuel oil discharging amount and air door loosen, the exhaust emission pollution of moment and oil consumption.

When high vehicle speeds, meet emergency situations, slow down when going slowly or braking rapidly, this moment, the moment enhancing of engine vacuum if there is not this vacuum control delay valve, postponed the Venturi tube return, the fuel oil that has volume is emitted, and cause unnecessary oil consumption and exhaust emission pollution.As cooperate this vacuum control delay valve, then the engine vacuum is strong more, obviously more corresponds to actual needs when then postponing.

This vacuum control delay valve relation is a main body by a cylinder block (31) and base (33), connect a matrix rubbermeter (38) formation one accessory that can in cylinder block (31), slide therebetween and by push rod (32), be combined with O type ring (37), (41) of leakproof between cylinder block (31) and push rod (32) and base (33), between the termination of push rod (32) and matrix rubbermeter (38) and be provided with packing ring (39), and establish the closing function of going up inlet hole (64) with steel ball (35), spring (36), locating stud (40) control base (33).It is that a minimum hole is slowly overflowed air that one escape hole (65) is arranged on the base (33), reaches delay action.Cylinder block (31) top set goes out a joint (34) and then connects the engine vacuum.

Another characteristics of the utility model Carburetor have idle oil-way system for design, it is by (as accompanying drawing 5, shown in 6) fuel tap body (50), oil resistance pin (51), upper cover body (52) form control valve and be embedded in the Carburetor back seat (3), it act as the oil circuit closing function that replaces solenoid valve in the automobile-used Carburetor, be characterized in the little simple structure of volume, when engine starts, fuel oil is entered by the oil inlet hole of oil inlet pipe (48) bottom, the engine vacuum drives the hole (67) that oil resistance pin (51) is blocked upper cover body (52) via hole (66), fuel oil is (68) through the hole, overflow by hole (69) by idling oil circuit emulsion tube (49), enter engine.When engine-off, oil resistance pin (51) slides to be blocked hole (68) and avoids fuel oil to overflow.And the idling oil circuit overfall main body (16), the adjustment screw (17) that are fixed in the back seat (3) provide idling oil circuit oil pump capacity, can adjust screw (17) and reach the suitable required oil and gas content of engine idling, an O type ring (53) is gone up and be arranged with to screw (17), a fixing spring (29) avoids screw (17) to rotate, and makes idling stable.Communicate by idling emulsion tube (49) between idling oil circuit overfall main body (16) and the fuel tap body (50), and porose (69), (66) communicate with the engine vacuum respectively.

Waste gas HC measured during the utility model idling is below 300PPM, and CO is below 15%, and the oil consumption of actual road examination can be travelled more than 60 kilometers for every liter, and very fast also can reaching more than the 120Km/H reached fuel-efficient, big, the oligosaprobic designing requirement of horsepower.

Claims

1, a kind of cam control Wen tubular type Carburetor, comprise by front stall, body and back seat constituting the main body of Carburetor and the floating drum oil circuit of bottom, it is characterized in that: this Carburetor comprises that also the variable Venturi's pipe mechanism, that utilizes cam control cooperates the main air door of variable Venturi's pipe mechanism and powerful subsidy oil-way system, to utilize the vacuum controlled vacuum control delay valve of engine, auto chock horsepower controlling mechanism and an idling oil-way system.

2, cam control Wen Shiguanshi Carburetor according to claim 1, it is characterized in that variable Venturi's pipe mechanism includes a variable Venturi's pipe (4), connect a connecting rod (30) and return spring (54) above the variable Venturi's pipe (4), the top of connecting rod (30) holds on the curved surface of cam (8), cam (8) is fixed on the running shaft (9), 2 emulsion tubes (24) identical with float chamber (6) are equipped with in front stall (1) bottom, and front stall (1) cooperates with body (2) and is formed with the gap and forms an oil outlet (60).

3, cam control Wen tubular type Carburetor according to claim 1, it is characterized in that main air door and powerful subsidy oil-way system include a main air door (5), oil resistance pin (15), contiguous block (14), oil resistance pin return spring (28), oil resistance pin jump ring (18) and powerful subsidy oil circuit emulsion tube (25), main air door (5) is fixed on the back seat (3), run through an oil resistance pin (15) on the main air door (5), oil resistance pin (15) cooperates an oil resistance pin jump ring (18) to be connected with cable wire (57) with a contiguous block (14), and an oil resistance pin return spring (28) is established in contiguous block (14) upper end.

4, cam control Wen tubular type Carburetor according to claim 1, it is characterized in that described vacuum control delay valve comprises the main body that a cylinder block (31) and base (33) constitute, connect a matrix rubbermeter (38) by a push rod (32) therebetween and constitute a slip accessory, and, also have escape hole (65) on the base (33) with the inlet hole (64) on a steel ball (35) that is positioned at base (33), spring (36), locating stud (40) the control base (33).

5, cam control Wen tubular type Carburetor according to claim 1, it is characterized in that auto chock horsepower controlling mechanism includes one and can begin to act on the tubulose chock plate (42) of cutting out towards powerful subsidy oil circuit emulsification pipeline gas port (64) and idling oil circuit emulsification pipeline gas port (65) in the reduction of engine vacuum, tubulose chock plate (42) one ends connect cam (43), be connected with vacuum valve (45) with a connecting rod (47), be combined with roller (44) on the cam (43), roller (44) is connected in running shaft driving cam (46) with connecting rod (55), and tubulose chock plate (42) switching position is subjected to the curve and roller (44) restriction of cam (43).

6, cam control Wen tubular type Carburetor according to claim 1, it is characterized in that the idling oil-way system includes oil inlet pipe (48), fuel tap body (50), can be with the oil resistance pin (51) of the strong and weak action of vacuum, upper cover body (52) is formed control valve and the idling emulsion tube (49) that is embedded in the back seat (3), idling oil circuit overfall main body (16), adjust screw (17), retainer spring (29) is formed, communicate by idling emulsion tube (49) between idling oil circuit overfall main body (16) and the fuel tap body (50), and difference porose (69), (66) communicate with the engine vacuum.