KR790001700B1 - Carburetor - Google Patents

Abstract

A carburetor assembly of an I.C. engine with the 1st & the 2nd carburetor assembly (100) (101), for providing a lean & rich mixture to main & auxiliary combustion cha- mbers, was composed of an intermediate (105) supported within a stationary hollow hub (120), an actuator member (122) mounted to turn on 120 for applying a force in one direction, resilient member (126) connected to turn 122 in the other direction and conn- ecting member to turn of 105 for coordinating turning movement.

Description

Carburetor

1 is a side view of a part of an embodiment of the present invention.

2 is a cross-sectional view taken along line 2-2 of FIG.

3 is a bottom view showing a part of the apparatus of the present invention.

4 is a partial plan view of the apparatus.

5 is a side view showing the primary intersection of the closed position.

6 is a side view showing the primary bridge of the open position.

7 to 9 are side views showing the state of the cam and follower connection between the primary bridge and the secondary bridge.

10 is a plan view of a modification thereof.

11 is a side view of the device shown in FIG.

12 is a plan view of a portion of FIG.

13 is a cross-sectional view taken along line 13-13 of FIG.

14 is a side view of a second modification.

15 is a cross-sectional view taken along line 15-15 of FIG.

First of all, the outline of the carburetor assembly has primary and secondary venturi passages for supplying the lean mixer to the engine's main combustion chamber, and also provides a subventilation passage for supplying the rich mixer to the engine's subcombustion chamber. Have. The bridge in each passage has an axis, the axis of the primary bridge projecting through the hollow hub on the carburetor body.

Several members and springs are mounted on the hub to act to control the rotational movement of all throttles of the engine's various operating conditions.

The link is condensed to the arm pivoting at one end with the primary sympathy and at the other end to the arm pivoting with the parasympathy. And the angle adjustment is provided between the parasymbol and its arm. The geometric relationship between the link and the arm is to provide a corresponding movement between the sympathies.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Next, the present invention relates to an internal combustion spark ignition piston engine having a subcombustion chamber in which each cylinder communicates with the main combustion chamber and the torch nozzle. This type of engine is disclosed in US Pat. No. 3890942, "Reduction of Nox, HC and CO in the Exhaust Gas of Internal Combustion Engines", issued June 24, 1975 in the United States.

More specifically, the present invention relates to a vaporizer assembly for supplying a lean mixer to a main combustion chamber and a rich mixer to a subcombustion chamber. In order to avoid the generation of unnecessary contaminants in the exhaust gas of the engine, it is important that the air-fuel ratio (ratio of air and fuel) of the lean and rich mixers is kept at a narrow limit with respect to the operating conditions of the engine as a whole.

Thus, it is important to minimize the generation of contaminants during cranking, fasting, idling, slow idling, acceleration, gear shifting, operating at that speed, slow and rapid acceleration.

According to the present invention, the primary sympathetic shaft, which is one axis of the pier, protrudes through a fixed hollow hub integrally formed on the vaporizer body.

A tightening cable attached to pivot the top of the hub against the action of the spring is connected to the operator's member. The member of the connector secured to the protruding end of the shaft connects the operator member to the shaft. In this way, the tension in the tightening cable is resisted by the hollow anchoring hub, and the tension does not cause axial bending. Another member that affects or deforms the rotational movement of the throttle is also attached on the hollow anchoring hub, and the transverse force from which it occurs is also absorbed by the hub, not the throttle. This property helps to ensure the smooth opening and closing of the bridge. A new type of connection is also established between the primary bridge controlling the lean mixer and the secondary bridge controlling the rich mixer.

This connection is achieved without the use of a cam and extremely precisely regulates the position of the sublime relative to each angular position of the primary. This connection is connected with the primary throttle to rotate and extends from the plane orthogonal through the axial center of the primary axial to the plane including the axial center of the primary and secondary axial axes and to the side of the plane containing the axial center. An arm pivoting transversely to the other side, and connected to rotate with the sub-axis, extending toward the main axis in the plane orthogonal to the plane including the axis of the primary and secondary axes, including the axis A link anchored to an arm that rotates only on its one side of the face is used with an adjustment device for changing the angular position of the arm with respect to its axis. In this way, the link connecting and regulating device ensures to supply the appropriate amount of the rich mixer to the subcombustion chamber of the engine with respect to the lean performance mixer supplied to the main combustion chamber of the engine under any operating condition of the engine. In addition, a novel type of mechanism is employed together with an active device for closing the secondary bridge when the primary bridge is moved to the closed position to generate the opening of the secondary bridge after opening the primary bridge by a predetermined amount.

A vacuum actuator is employed to position the point of intersection between certain operating conditions of the engine. Prevents the closing of the bridge with an additional device too quickly and ensures that the bridge closes quickly when the ignition system becomes inoperative.

And another detailed object and advantages are apparent below.

In the figure, reference numeral 10 denotes a carburetor, and the assembly of the carburetor includes a metal body 11 having a primary passage 12, a wall forming the secondary passage 13, and a side passage 14; Include. These passages are parallel and at the same time have venturi slows 15, 16 and 17, respectively. The fuel jets introduced from the flow chamber in the main body 11 create a lean mixer in the passages 12 and 13 so as to be supplied to the main combustion chamber of the engine, and are concentrated in the passage 14 to be supplied to the engine combustion chamber. Make a mixer.

Each of the passages 12, 13, and 14 has an edge supported on an axis that rotates with respect to the vaporizer body 11. In this way, the primary bridge 18 is fixed on the shaft 19, the secondary bridge 20 is fixed on the shaft 21, and the secondary bridge 22 is fixed on the shaft 23. And axes 19, 21, and 23 are parallel.

As shown in Fig. 2, the hollow portion 24 is formed in the wall of the vaporizer body 11, and protrudes outward therefrom to surround a portion of the symmetry shaft 19. Form. An operator member, denoted by reference numeral 25, is attached to be pivoted on the stationary hub 24, which member 25 is two metal punchings fixed to each other by a rotating pin 28 as a unitary device. It consists of (26) and (27). The single member 25 is operated by a towson spring 29 surrounding the hub 24 with one end engaged with the stop pin 30 and the other end engaged with the member 25. The towson spring 29 thus acts on the single member 25 counterclockwise as a first degree, as opposed to the opening movement of the primary bridge 18. The component 26 of the single member 25 has a fin 33 extending in the axial direction, which has a portion received in the slot 34 on the connecting member 35. The connecting member 35 is fixed by the nut 36 to the protruding end portion of the shaft 19. It can be seen in this description that the single member is installed on the fixed hollow hub 24, but connected to rotate with the bridge 19.

The component 27 of the single member 25 has an integral socket 37 which receives the terminal fitting 38 at the end of the tightening cable 39. The cable 39 passes through the receiving tube 40 fixed to the fixing bracket 41 with the lock nut 42. The tension given to the tightening cable 39 acts on the single member 25 while rotating it clockwise in FIG. 1 against the action of the torsion spring 29. This rotational movement of the member 25 causes the connecting member 35 to empty in the direction of opening the throttle 19 in the passage 12. The closing position of the bridge 18 is determined by the setting of the adjustment screw 43 that engages the stopper 44 provided on the component 27. The movement of the stool 18 is limited by contact with the fixed stop pin 30 of the stopper 45. Since the actuator member 25 is fitted on the fixed hub 24 and not on the shaft 19, the linear force given to the socket 37 by the tightening cable 39 does not generate a bending load on the bridge 19. Do not. The torque on the member 25 is transmitted to the throttle 19 via the connecting member 35. Two other members are installed to pivot on the hollow hub 24. On the other hand, the determinant 47 for determining the tightening position has an arm 48 which is affixed to the rod 49 of the operator obtained from the vacuum actuated diaphragm assembly 50. The other arm on the tightening positioner 47 has a rounded nose portion 51 that engages the side of the fin 33. The slot 52 is equipped for early factory adjustment of the round nose 51 with respect to the fin 33 by the insertion of a deformation tool in the slot. Another member pivotally installed on the hollow hub 24 is represented by 53, which is a first arm condensed by 55 to an operator rod 56 extending from the diaphragm assembly 57. 54). The rounded nose portion 58 on the arm 54 is in contact with the shoulder 59 on the component 27 of the single member 25.

Slot 60 provides a device for factory adjustment located in round nose 58.

The component 27 of the single member 25 has an outer circumferential cam surface 62 that cooperates with the middle eastern roller 63 on the member 64.

This member 64 pivots simultaneously with the axis 21 for the secondary bridge 20.

The shaft 21 protrudes through the hollow fixing hub 65, and the protruding end thereof is fixed to the member 64. The other member 66 is fitted to pivot at the fixed hub 65, which has a radial protrusion 67 engaged at one end 68 of the towson spring 69. The other end 70 of the towson spring is integrated into the fixing projection 71 on the vaporizer body 11. It will be appreciated that the towson spring 69 in this description acts to rotate in the clockwise direction as seen in FIG. The projection 67 on the member 66 imparts an opposite force to the opening movement of the secondary bridge 20 at the end 72 of the member 64. The roller 72a provided on the single member 25 is engaged with the cam surface 73 on the member 66 after passing through the circular arc stroke predetermined in the direction in which the primary throttle 19 opens.

When the single member 25 continues to rotate in the open direction, the roller 72a moves the member 66 counterclockwise against the action of the Lawson spring 69. Prior to engagement with the cam surface 73 of the roller 72a, the cam surface 62 is moved to a position where the member 64 can rotate counterclockwise with respect to the roller 63. As shown in FIG. The rotational movement of the secondary throttle 21 is achieved by the vacuum actuated diaphragm assembly 75 which acts via the rod 76 and the attenuation 77 to the member 64. A device is provided to cope with the movements of the primary bridge 18 and the secondary bridge 22.

In order to minimize unnecessary contaminants in the engine's exhaust, it is essential that these two bridges be accurately controlled during operating conditions of the entire engine. The link 78 is affixed 79 by the forwardly extending arm 80 blocked on the operator member 25. The link 78 is affixed to the rear 82 extending arm 82 on the member 83 pivoting on the attention of the axis of the throttle 23 with 81. The other member 84 fixed to the throttle 23 is freely connected to the member 83 by the adjusting screw 85.

The adjusting screw 85 controls the positions of the relative angles of the members 83 and 84, and in this way controls the position of the pivot 81 relative to the side edge 22. FIG. The towson spring 86 extends between the pivot boards 79 and 81 to prevent rocking.

The ducts 18 and 22 are marked in the closed position with the fifth degree and in the opened position in the sixth degree.

As shown in FIG. 6 in order to obtain a desired angular motion of the primary symmetry 18 of the sub-legs 22, the effective length "a" of the short arm 80 is the effective length "of the long arm 82". b ”should be about 3/4. And the following relationship must exist.

(a + c) / d 0.9 to 1.2

Where a = effective length of the short arm 80

c = effective length of link 78

d = distance of the centerline of the bridges 19 and 23

7, 8 and 9 are graphs showing how the primary bridge 18 moves relative to the secondary bridge 20. In Fig. 7, both eccentrics 18 and 20 are closed. When the terminal bracket 38 of the tightening cable 39 acts on the socket 37 to rotate the primary bridge 18 by about 40 degrees, the cam roller 72a as shown in FIG. Since the cam face 73 is properly reached, the secondary bridge 20 is in a closed state.

According to the continuous rotational movement of the primary bridge 18, the roller 72a on the cam surface 73 rotates the member 66 counterclockwise against the towson spring 69.

This causes the pliers 67 to move in a direction that separates the member 64, so that the diaphragm assembly 75 is able to rotate the throttle 21 counterclockwise to open the secondary ridge 20. In Fig. 2, the edges 18 and 20 are shown in the open position. As shown in FIG. 2, the crank arm 87 may be secured to the protruding end of the shaft 19 for connection to a conventional acceleration pump (not shown).

Initial cranking of the engine in operation may require the use of the choke device 88. During this initial cranking, the primary bridge 18 and the secondary bridge 22 are in the fast idle position, and the secondary bridge 20 is closed. The engine is started to rotate downward by its own force, and when the cranking is broken, the accelerator pedal (not shown) tightens the operator member 25 to rotate clockwise when viewed in FIG. Operate to move the control cable 39.

This results in the opening movement of the primary bridge 18 and the opening movement of the para bridge 22.

The initial movement of the operator subtitle 25 is resisted by the torsion spring 29, and after the member 25 has rotated several times, the rod 56 reaches the bottom in the device 57, 53) further rotational movements are prevented. Further rotational movement by the operator member 25 is resisted by both Lawson springs 29 and 32. When the primary bridge is about 40 degrees open, the cam surface 62 moves to allow the roller 63 and the member 64 to rotate around the axis of the bridge axis 21. A large amount of air flows through the primary passage 12 to generate a significant pressure drop in the venturi slower 15.

This low pressure part in the passage (not shown) vanryry 15 communicates with the vacuum actuated diaphragm assembly 75. According to the opening movement in which the primary bridge 13 is continued by the tightening control cable 39, the engine speed is increased, and as a result, the amount of air introduced by placing the venturi slow 15 is increased. Cause This in turn causes a greater pressure drop in the venturi slower, thereby causing the vacuum actuated diaphragm assembly 75 to open the secondary bridge 20 as it extends the rod 76. This supplies an additional amount of lean mixer to the main combustion chamber of the engine. At the same time, the ring cages 78, 80, 82 again increase the opening of the side bridge 22 to provide an increase in the supply of the rich mixer to the subcombustion chamber of the engine.

A control valve (not shown) connects the vacuum actuated diaphragm assembly 50 to the suction pressure of the manifold only when the suction pressure reaches a predetermined size, for example 530 mm of mercury.

When the driver's vehicle decelerates and decelerates, the driver raises his foot off the accelerator pedal, thereby counterclockwise springs 29 and 32 view the primary bridge 18 in FIG. Allow to loop in the direction. The Lawson spring 69 is tightly controlled to start closing the secondary bridge 20. However, when the secondary bridge 20 is moving toward the position where the primary bridge 18 is closed, the open state tends to continue.

This is because the vacuum strength in the apparatus 75 does not decrease quickly enough to respond to changes in suction pressure in the primary venturi throw 15. This difficulty is overcome by the action of the cam face 62 and the follower roller 63. That is, the action forces the closing of the secondary bridge 20 when the primary bridge 18 is closed.

Subsequent gradual deceleration results in a continual closing motion of the primary secondary stool and the closing movement of the secondary stool 22 corresponds to the closing movement of the primary stool 18.

If the driver of the vehicle hastened his foot off the accelerator pedal, a sudden deceleration of the engine occurs. This is because the primary bridge 18 and the secondary bridge 22 move toward the idling position while the secondary bridge 20 moves toward the closing position.

The positioner assembly 50 acts to ensure that the bridge is opened at an angle greater than the idling position while the vehicle is decelerated above a predetermined speed, so as to minimize bad emission formation during engine exhaust. The diaphragm assembly 57 first acts as a dashpot that limits the closing of the primary and secondary lip so quickly that it would interfere with proper operation of the engine. It is advisable to reduce the shielding rate when the primary driver 18 is close to the closed position when the rider pulls off the accelerator pedal to shift or decelerate. This necessitates overcoming the function of the positioner assembly 50, which does not respond rapidly when the stool 18 approaches toward a rapidly closed position. When less than about 12 miles / hour, a speed detection switch (not shown) shuts off the supply of vacuum pressure to the assembly 50 and allows the primary stool 18 to close to the idle position. The device 57 also acts as a run on preventer as the electrical ignition circuit communicates with the chamber inside when the energization is off.

In the present invention variant shown in the tenth to thirteenth embodiments, the vaporizer assembly 100 is employed to supply a lean mixer to each of the main combustion chambers of the engine, and the second vaporizer assembly 101 supplies a rich mixer to the combustion chamber of the engine. Equipped to supply

The first vaporizer assembly 100 employs a tightening actuator bar 102 to actuate the intersection of the conventional assembly 100 as a normal type. The tightening bar 102 is affixed to the crank member 104 secured to the intermediate shaft 105 at 103. Tension spring 106 is connected to crank member 104 to rotate shaft 105 counterclockwise when viewed in FIG. The side edge 107 is fixed on the solid shaft 108 installed so that the vaporizer 101 is rotated on the main body 109.

The cam member 11 is fixed to the disk 111 fixed to the shaft 105 and the cam 110 has a cam surface 112 engaged with the middle eastern roller 113 on the crank arm 114. The crank 115 connected to the solid shaft 108 is freely connected to the crank arm 114 by the adjusting screw 116.

In this description, the rotational motion of the intermediate shaft 105 is interposed between the cam 110, the follower roller 113, the adjusting screw 116 and the member 115, and it is understood that the rotational motion of the symmetry 107 occurs. Can be.

The intermediate shaft 105 is blocked in the bearing 118 fixed on the fixing bracket 110. The shaft 105 is again supported in the fixed hollow hub 120 fixed to the fixing bracket 121. The operator member 122 is installed to rotate on the hub 120 and has a socket 123 for receiving the end feed 124 of the tightening cable 125. Tension spring 126 is connected to operator member 122 to resist in clockwise motion as seen in FIG. The gage portion 132 on the member 104 protrudes onto the actuating member 22, thus resisting the force exerted by the tightening cable 125 and the actuation of the spring 126. The member 104 rotates to rotate the intermediate shaft 105 of the rotational movement. The diaphragm assembly 127 acts by interposing a rod 128 and a constriction 129 in the fitted member 13 to be rotated on the hollow anchoring hub 120. The gage portion 131 fixed to the disc 111 overlaps one portion of the member 130, so that the tension of the rod 128 acts to rotate clockwise when the shaft 105 is viewed in FIG. 10. do.

This device can be described as a dashfor preventing the stool from closing too soon.

The vacuum actuated diaphragm assembly 133 acts via a rod 134 and a constriction 135 to rotate the member 136 installed to pivot on the fixed bearing 118. The other member 137 fixed to the protruding end of the shaft 105 has a gage portion 138 superimposed on a portion of the member 136, so that the tension of the rod 134 acts to pivot the shaft 105. do. This device can be described as a tightening positioner.

The shaft 105 connected to pivot the parasymmetric shaft 108 is operated on the tightening cable 125 via a member installed to pivot onto the fixed hub 120 and the shaft 105 protrudes through the hub 120. Therefore, it can be seen that the load generated by the cable tension is not taken by the shaft 105 but by the fixed hub 120.

And it can be seen that the rotational movement of the symmetry shaft 108 is applied to the action of the tightening cable 125 is affected by the action of the diaphragm assembly 127 and the vacuum actuator 133.

In another variant of the present invention as shown in FIGS. 14 and 15, the ordinary vaporizer 100 is employed as described above and the intersection thereof is actuated by the tightening actuation Java 102.

However, there is no intermediate axis corresponding to the shaft 105, and instead the parasymmetric shaft 140 is directly interposed between the members 142, 143 installed to rotate on the fixed hollow hub 144 via the member 141. Connected.

The hub 144 acts to control the supply of the rich mixer to the subcombustion chamber 147 formed in the passage 146 and formed into a single body with the main body 145 of the incubator assembly 146. do.

Tightening cable 150 is received in socket 152 installed in member 142 and has a tool 151 at its distal end. The tensioning of the tightening cable 150 acts to rotate the member 142 clockwise as seen in FIG. 14 against the action of the tension spring 153. The Lawson spring 154 surrounding the hub 144 is opposed to the rotational movement of the member 142 by the force employed by the tightening positioner connection 155 or the high-speed port connection 156.

The adjustment screw 157 provides a device for changing the position of the stool 147 relative to the member 142.

The tightening locator rod 158 and the wetport lot 159 have last busbar connections 160, 161, respectively.

This is necessary to allow the stool 147 to be opened in position without being interrupted by the respective short stroke rods 158 and 159. The operation of the variant of the invention as shown in FIGS. 10 to 13, 14 and 15 will be apparent from the description of the preferred embodiment described above.

Claims (1)

A vaporizer assembly for use in an internal combustion engine having at least one main combustion chamber and a subcombustion chamber communicating therewith by a torch nozzle, the vaporizer assembly having a primary passage suitable for supplying a lean mixer to the main combustion chamber of the engine. A second carburetor assembly having a first carburetor assembly and a side passage suitable for supplying a rich mixer to the subcombustion chamber of the engine, each of the passages having a bridge attached to the throttle, the middle of the carburetor assembly; An intermediate shaft positioned at, an apparatus to which the throttle and the intermediate shaft are attached for rotational movement around the parallel axis, a hollow fixed hub receiving the intermediate shaft, a member fitted to rotate on the hub, and the member in one direction A device for forcing it to rotate, an elastic device connected to rotate the member in the other direction, and a member for rotating the intermediate shaft A carburetor having a combination of a device for connecting and a device for transmitting the pivotal motion of the intermediate shaft to each bridge.

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