CA1130668A - Control motor for carburetors - Google Patents
Control motor for carburetorsInfo
- Publication number
- CA1130668A CA1130668A CA351,583A CA351583A CA1130668A CA 1130668 A CA1130668 A CA 1130668A CA 351583 A CA351583 A CA 351583A CA 1130668 A CA1130668 A CA 1130668A
- Authority
- CA
- Canada
- Prior art keywords
- housing
- diaphragm assembly
- engine
- chamber
- threaded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
- F02M1/08—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically
- F02M1/14—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically dependent on pressure in combustion-air- or fuel-air-mixture intake
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Actuator (AREA)
- Means For Warming Up And Starting Carburetors (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A fluid operated control motor having an adjusting mechanism which can be adjusted from the exterior of the motor to limit the length of stroke of a diaphragm assembly wherein the adjusting member is threaded for longitudinal movement and has an element which acts as a seal to prevent fluid leakage from the motor and also resists rotation of the adjusting member to maintain it in its preselected adjusted position.
A fluid operated control motor having an adjusting mechanism which can be adjusted from the exterior of the motor to limit the length of stroke of a diaphragm assembly wherein the adjusting member is threaded for longitudinal movement and has an element which acts as a seal to prevent fluid leakage from the motor and also resists rotation of the adjusting member to maintain it in its preselected adjusted position.
Description
This invention relates to vacuum motors for carbur-etor controls and more particularly to the adjustment for such controls.
Various vacuum motors, often called vacuum breaks are used to control different aspects of carburetor operation.
; Vacuum breaks use the vacuum formed at the intake manifold of an internal combustion engine to move a diaphragm assembly con-nected through linkages to various control valves such as the choke valve, for example. Upon starting the engine the vacuum break acts to open the choke valve to avoid burning of excessive fuel and undesirable emissions. Such vacuum breaks or motors typically are adjusted at the time that the automobile is man-ufactured and rarely are readjusted. Such adjusting devices, however, are costly, tend to go out of adjustment due to vi-bration and the like and cause leakage requiring expensive sealing arrangements.
It is an object of the invention to provide an adjust-ing arrangement for vacuum motors on carburetors wherein the adjusting device is maintained in its selected position of adjustment.
Another object of the invention is to provide a fluid operated control motor device for carburetors having an adjust-ing device which prevents fluid leakage.
Still another object of the invention is to provide a control motor moveable to control a carburetor mechanism wherein the adjustable member is locked in its selected adjusted position by means which a]so prevent fluid leakage.
Yet another object of the invention is to provide a motor to control a carburetor which permits adjustment of a device within the motor by means accessible at the exterior of -~ the actuator without causing leakage problems.
--1-- ~
e~
~3~
The objects of the invention are accomplished by a motor moveable to control the carburetor on an internal com-bustion engine in response to stàrting of the engine wherein a housing is supported in fixed relationship relative to the carburetor or the engine on which the carburetor is mounted.
The housing contains a diaphragm assembly which is moveable and which forms a chamber communicating with the intake manifold to establish vacuum in the chamber when the engine is started.
The diaphragm assembly is connected to the carburetor device through linkage and the degree of movement of the diaphragm is limited by an adjusting device disposed in tha path of diaphragm movement which engages the diaphragm at some selected predeter-mined position. The adjusting means are in the form of an elongated threaded member rotatably supported in the threads of a mounting member which is mounted on a wall of the housing so that one end of the elongated adjusting member is disposed within the housing and the opposite end is disposed at the ex-terior of the housing. The passage of fluid from the chamber in the housing is prevented by a resilient annular element which engages the threads of the elongated adjusting element and provides a seal preventing fluid leakage from within the chamber while at the same time locking the longitudinally ex-tending adjusting member to prevent accidental displacement from its selected adjusted position.
These and other objects of the invention will be apparent from the following description and from the drawings in which:
Figure 1 is a cross sectional view of a carburetor control motion embodying the invention with portions of the carburetor an engine shown diagramatically;
Figure '2 is a crass .sectional view of another. em-bodiment of the invention;
Figure 3 is a, cross sectional view similar to Figure
Various vacuum motors, often called vacuum breaks are used to control different aspects of carburetor operation.
; Vacuum breaks use the vacuum formed at the intake manifold of an internal combustion engine to move a diaphragm assembly con-nected through linkages to various control valves such as the choke valve, for example. Upon starting the engine the vacuum break acts to open the choke valve to avoid burning of excessive fuel and undesirable emissions. Such vacuum breaks or motors typically are adjusted at the time that the automobile is man-ufactured and rarely are readjusted. Such adjusting devices, however, are costly, tend to go out of adjustment due to vi-bration and the like and cause leakage requiring expensive sealing arrangements.
It is an object of the invention to provide an adjust-ing arrangement for vacuum motors on carburetors wherein the adjusting device is maintained in its selected position of adjustment.
Another object of the invention is to provide a fluid operated control motor device for carburetors having an adjust-ing device which prevents fluid leakage.
Still another object of the invention is to provide a control motor moveable to control a carburetor mechanism wherein the adjustable member is locked in its selected adjusted position by means which a]so prevent fluid leakage.
Yet another object of the invention is to provide a motor to control a carburetor which permits adjustment of a device within the motor by means accessible at the exterior of -~ the actuator without causing leakage problems.
--1-- ~
e~
~3~
The objects of the invention are accomplished by a motor moveable to control the carburetor on an internal com-bustion engine in response to stàrting of the engine wherein a housing is supported in fixed relationship relative to the carburetor or the engine on which the carburetor is mounted.
The housing contains a diaphragm assembly which is moveable and which forms a chamber communicating with the intake manifold to establish vacuum in the chamber when the engine is started.
The diaphragm assembly is connected to the carburetor device through linkage and the degree of movement of the diaphragm is limited by an adjusting device disposed in tha path of diaphragm movement which engages the diaphragm at some selected predeter-mined position. The adjusting means are in the form of an elongated threaded member rotatably supported in the threads of a mounting member which is mounted on a wall of the housing so that one end of the elongated adjusting member is disposed within the housing and the opposite end is disposed at the ex-terior of the housing. The passage of fluid from the chamber in the housing is prevented by a resilient annular element which engages the threads of the elongated adjusting element and provides a seal preventing fluid leakage from within the chamber while at the same time locking the longitudinally ex-tending adjusting member to prevent accidental displacement from its selected adjusted position.
These and other objects of the invention will be apparent from the following description and from the drawings in which:
Figure 1 is a cross sectional view of a carburetor control motion embodying the invention with portions of the carburetor an engine shown diagramatically;
Figure '2 is a crass .sectional view of another. em-bodiment of the invention;
Figure 3 is a, cross sectional view similar to Figure
2 showing the condition of an element prior to insertion of an 5 adjusting memberi Figures 4 and 5 show el'ements of the structure seen in Figure 3 prior to assembly; and Figure 6 is an end view of the structure shown in Figure 3.
Referring to the 'drawings and particularly to Figure 1 the control motor mechanism embodying the invention is desig-nated at 10 which is mounted by means of a bracket 11 on a carburetor 12 which in turn is' mounted to communicate with an intake manifold 14 forming part of an internal combustion engine 16, all in a conventional manner. In general the motor 10 responds to the presence of vacuum pressure in the manifold 14 when the engine 16 starts to move an output member or stem 18 connected through linkage '20 to move a choke valve 22 from a closed toward an open position.
The motor 10 includes a housing 24 including a for-ward cover member 26 and rearward cover member 28 which are joined together by means of bending the peripheral flange 30 of the :~orward cover member 26 over the flange 32 of the rearward cover member 28. The 'flanges 30 and. 32 act to clamp the peripheral flange 34 of a flexible, rubber-like diaphragm 36.
- The diaphragm 36 is part of a diaphragm assembly 38 which in-cludes a backing plate 40 and a backing plate 42 disposed at opposite sides o~ the diaphragm 36 and fastened together and to :: the diaphragm 36 by means of a rivet portion 44 forming part of the backing plate 42 and passing through openings in the ~3 ~
diaphragm 36 and in the backing plate 40. The backing plate 42 supports a tubular stem housing 46 which contains one end of the output member 18 and a spring 48. The spring 48 acts be-tween one end of the stem housing 46 and the head 50 of the output member 18 to urge the latter to the left as viewed in Figure 1 against the backing plate 42.
The diaphragm assembly 38 divides the interior of the housing lnto a pair of chambers 52 and 54. The chamber 52 is in continuous communication with the atmosphere through an open-ing 56 formed axi.ally of the forward cover member 26 which alsoacts to slidably support the stem housing 46.
The chamber 54 is maintained in constant communication with the manifold 14 by way of a stem 58 and a line 60 connect-ing to stem 58 with the manifold 14.
Means for adjusting and controlling the length of stroke of the diaphragm assembly 38 and output member 18 is in the form of an adjusting mechanism indicated at 62. The adjust-ing mechanism 62 includes a mounting member 64 having a flange 66 which is seated around edges of an opening 68. The mount-ing member 64 is pressed into the opening 68 and is brazed to the cover member 28 to form a fluid tight connection. The mounting member 64 is internally threaded to receive an elon-gated adjusti.ng member 70 in the form of a threaded bolt having a head 72 at the exterior of the motor 10 and an end 74 which is disposed within the vacuum chamber 54. Rotation of the ad-justing member 70 relative to the mounting member 64 causes relative displacement of the parts longitudinally relative to each other to position the end 74 in a selected position in the path of movement of the diaphragm assembly 38 to determine the maximum length of stroke of the outpu~t member 18.
~31~
The means by which the adjusting member 70 is locked in its selected position of adjustment and by which the vacuum chamber 54 is sealed from the atmosphere is in the form of an annular ring 76 disposed in a groove 78 formed at one end of the mounting member 64.
Referring now to Figure 2 another embodiment of the invention is shown in which a mounting member 80 is disposed in the rear cover member 28 so that the annular ring 76 and the containing groove 78 are disposed to the opposite side of the wall 28 from the mounting member 62 seen in Figure 1.
Referring now to Figure 5 the annular ring 76 used in both embodiments of the invention is shown in its as molded condition. The annular ring 76 has an opening 81, the diameter of which is slightly.less than the minor thread diameter of the bolt 70. The annular ring 76 is made of a slightly compressible material such as Nylon. During the manufacturing process the annular ring 76 is disposed in a cavity 82 formed at one end of the mounting member 64. Subse~uently the annular wall 84 form-. . ing the cavity 82 is distorted in a press to form the groove 78 and to compress the annular ring 76 axially. In addition, the ~; lip 86 forming one side of the groove 78 is staked to form several depressions 88. The depressions 88 further compresses the ring 76 axially to insure a fluid tight seal between the - mounting member 64 and the ring 76 and also to prevent rotation : 25 of the ring 76 within the groove 78. Such compression also re-: duces the internal diameter of the ring 76 to increase the in-terference with the adjusting screw 70.
The annular ring 76 in both of the embodiments of the invention are supported in a motor lO to operate identically.
In each instance the compressed ring 76 is maintained in ~L~3~
compressed interfering engagement with the external threads on the adjusting member 70 for all positions of adjustment of the adjusting screw. The compression of the ring 76 acts with the threads of member 70 to form a fluid tight seal preventing air leaks into the vacuum chamber 54 and also prevents accidental rotation of the adjusting member 70 from its preselected position.
Upon starting the internal combustion engine 16, vacuum pressure is established in the manifold 14 which is communicated through the line 60 and the stem 58 to the vacuum chamber 54. The differential between atmospheric pressure in chamber 54 and the atmosphere in chamber 52 results in a force moving the diaphragm assembly 38 to the left against the action of a spring 100 acting between backing plate 40 and an interior wall of the rearward cover 28. Movement of the diaphragm assembly 38 causes movement of the stem forming the output member 18 to the left until-the rivet portion 44 of the diaphragm assembly 38 moves into engagement with the stop means formed by the end 74 of the adjusting member 70.
A control motor for carburetors has been provided in which a simple adjusting mechanism insures sealing of the motor against leakage and at the same time maintains a preselected adjustment of the adjusting mechanism through means of combined - sealing and locking ring compressed within a groove to engage the threads of an adjust.ing member.
Referring to the 'drawings and particularly to Figure 1 the control motor mechanism embodying the invention is desig-nated at 10 which is mounted by means of a bracket 11 on a carburetor 12 which in turn is' mounted to communicate with an intake manifold 14 forming part of an internal combustion engine 16, all in a conventional manner. In general the motor 10 responds to the presence of vacuum pressure in the manifold 14 when the engine 16 starts to move an output member or stem 18 connected through linkage '20 to move a choke valve 22 from a closed toward an open position.
The motor 10 includes a housing 24 including a for-ward cover member 26 and rearward cover member 28 which are joined together by means of bending the peripheral flange 30 of the :~orward cover member 26 over the flange 32 of the rearward cover member 28. The 'flanges 30 and. 32 act to clamp the peripheral flange 34 of a flexible, rubber-like diaphragm 36.
- The diaphragm 36 is part of a diaphragm assembly 38 which in-cludes a backing plate 40 and a backing plate 42 disposed at opposite sides o~ the diaphragm 36 and fastened together and to :: the diaphragm 36 by means of a rivet portion 44 forming part of the backing plate 42 and passing through openings in the ~3 ~
diaphragm 36 and in the backing plate 40. The backing plate 42 supports a tubular stem housing 46 which contains one end of the output member 18 and a spring 48. The spring 48 acts be-tween one end of the stem housing 46 and the head 50 of the output member 18 to urge the latter to the left as viewed in Figure 1 against the backing plate 42.
The diaphragm assembly 38 divides the interior of the housing lnto a pair of chambers 52 and 54. The chamber 52 is in continuous communication with the atmosphere through an open-ing 56 formed axi.ally of the forward cover member 26 which alsoacts to slidably support the stem housing 46.
The chamber 54 is maintained in constant communication with the manifold 14 by way of a stem 58 and a line 60 connect-ing to stem 58 with the manifold 14.
Means for adjusting and controlling the length of stroke of the diaphragm assembly 38 and output member 18 is in the form of an adjusting mechanism indicated at 62. The adjust-ing mechanism 62 includes a mounting member 64 having a flange 66 which is seated around edges of an opening 68. The mount-ing member 64 is pressed into the opening 68 and is brazed to the cover member 28 to form a fluid tight connection. The mounting member 64 is internally threaded to receive an elon-gated adjusti.ng member 70 in the form of a threaded bolt having a head 72 at the exterior of the motor 10 and an end 74 which is disposed within the vacuum chamber 54. Rotation of the ad-justing member 70 relative to the mounting member 64 causes relative displacement of the parts longitudinally relative to each other to position the end 74 in a selected position in the path of movement of the diaphragm assembly 38 to determine the maximum length of stroke of the outpu~t member 18.
~31~
The means by which the adjusting member 70 is locked in its selected position of adjustment and by which the vacuum chamber 54 is sealed from the atmosphere is in the form of an annular ring 76 disposed in a groove 78 formed at one end of the mounting member 64.
Referring now to Figure 2 another embodiment of the invention is shown in which a mounting member 80 is disposed in the rear cover member 28 so that the annular ring 76 and the containing groove 78 are disposed to the opposite side of the wall 28 from the mounting member 62 seen in Figure 1.
Referring now to Figure 5 the annular ring 76 used in both embodiments of the invention is shown in its as molded condition. The annular ring 76 has an opening 81, the diameter of which is slightly.less than the minor thread diameter of the bolt 70. The annular ring 76 is made of a slightly compressible material such as Nylon. During the manufacturing process the annular ring 76 is disposed in a cavity 82 formed at one end of the mounting member 64. Subse~uently the annular wall 84 form-. . ing the cavity 82 is distorted in a press to form the groove 78 and to compress the annular ring 76 axially. In addition, the ~; lip 86 forming one side of the groove 78 is staked to form several depressions 88. The depressions 88 further compresses the ring 76 axially to insure a fluid tight seal between the - mounting member 64 and the ring 76 and also to prevent rotation : 25 of the ring 76 within the groove 78. Such compression also re-: duces the internal diameter of the ring 76 to increase the in-terference with the adjusting screw 70.
The annular ring 76 in both of the embodiments of the invention are supported in a motor lO to operate identically.
In each instance the compressed ring 76 is maintained in ~L~3~
compressed interfering engagement with the external threads on the adjusting member 70 for all positions of adjustment of the adjusting screw. The compression of the ring 76 acts with the threads of member 70 to form a fluid tight seal preventing air leaks into the vacuum chamber 54 and also prevents accidental rotation of the adjusting member 70 from its preselected position.
Upon starting the internal combustion engine 16, vacuum pressure is established in the manifold 14 which is communicated through the line 60 and the stem 58 to the vacuum chamber 54. The differential between atmospheric pressure in chamber 54 and the atmosphere in chamber 52 results in a force moving the diaphragm assembly 38 to the left against the action of a spring 100 acting between backing plate 40 and an interior wall of the rearward cover 28. Movement of the diaphragm assembly 38 causes movement of the stem forming the output member 18 to the left until-the rivet portion 44 of the diaphragm assembly 38 moves into engagement with the stop means formed by the end 74 of the adjusting member 70.
A control motor for carburetors has been provided in which a simple adjusting mechanism insures sealing of the motor against leakage and at the same time maintains a preselected adjustment of the adjusting mechanism through means of combined - sealing and locking ring compressed within a groove to engage the threads of an adjust.ing member.
Claims (4)
1. A control motor moveable to control a carburetor regulating mechanism on an internal combustion engine in re-sponse to starting the engine, the combination comprising; a housing supported in fixed relationship relative to said engine, a diaphragm assembly moveable in said housing and forming an actuating chamber between an end wall of said housing and said diaphragm assembly, said actuating chamber being connected to the intake manifold of said engine to establish vacuum in siad actuating chamber upon starting of said engine, said diaphragm assembly being moveable in said housing towards said end wall in the presence of vacuum in said chamber, output means con-nected to said diaphragm and operable to move therewith to con-trol said carbuaretor regulating mechamism upon movement of said diaphragm assembly toward said end wall, a threaded opening formed in said end wall and communicating with said chamber, adjusting means comprising an elongated threaded member thread-ably engaged in said opening to extend into said actuating chamber, for engagement with said diaphragm assembly, resilient means surrounding said opening and being disposed in sealing engagement with said housing and with said elongated member for all positions of adjustment of said adjusting means, asid resilient means acting with said threaded member to prevent rotation of said threaded member relative to said wall.
2. The combination according to claim 1 wherein said threaded opening is formed by a mounting member fastened in fluid tight relationship to a wall of said housing and wherein said resilient means is disposed at one end of said threaded opening.
3. The combination of claim 2 wherein said threaded member is disposed coaxially with said output means.
4. The combination of claim 2 wherein said mounting member has an annular, radially inwardly opening groove and wherein said resilient means is disposed in compressed relation-ship in said groove.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US5999579A | 1979-07-23 | 1979-07-23 | |
| US059,995 | 1987-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1130668A true CA1130668A (en) | 1982-08-31 |
Family
ID=22026653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA351,583A Expired CA1130668A (en) | 1979-07-23 | 1980-05-09 | Control motor for carburetors |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5618047A (en) |
| CA (1) | CA1130668A (en) |
| DE (1) | DE3027723A1 (en) |
| FR (1) | FR2461822A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3325161A1 (en) * | 1982-07-12 | 1984-02-02 | Schmelzer Corp., 48507 Flint, Mich. | Pressure-sensitive valve arrangement |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3606983A (en) * | 1969-04-21 | 1971-09-21 | Holley Carburetor Co | Carburetor having an automatic choke |
| FR2122698A5 (en) * | 1971-01-20 | 1972-09-01 | Brev Etudes Sibe | |
| US3965223A (en) * | 1974-09-18 | 1976-06-22 | Schmelzer Corporation | Charge forming device |
| US4098459A (en) * | 1976-07-30 | 1978-07-04 | Schmelzer Corporation | Vacuum break device |
| CA1083447A (en) * | 1977-11-03 | 1980-08-12 | Benjamin C. Benjamin | Adjustment for carburetor control device |
-
1980
- 1980-05-09 CA CA351,583A patent/CA1130668A/en not_active Expired
- 1980-06-09 JP JP7674980A patent/JPS5618047A/en active Pending
- 1980-06-09 FR FR8012781A patent/FR2461822A1/en not_active Withdrawn
- 1980-07-22 DE DE19803027723 patent/DE3027723A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5618047A (en) | 1981-02-20 |
| FR2461822A1 (en) | 1981-02-06 |
| DE3027723A1 (en) | 1981-02-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0454356Y2 (en) | ||
| US5723829A (en) | Muffler assembly of internal combustion engine | |
| US4284261A (en) | Stroke adjustment for vacuum motor | |
| US3779222A (en) | Malfunction indicator for exhaust gas recirculation valve | |
| US3606983A (en) | Carburetor having an automatic choke | |
| US4334514A (en) | Fuel injection pump for internal combustion engine | |
| US4643221A (en) | Vacuum check valve | |
| CA1130668A (en) | Control motor for carburetors | |
| US4244343A (en) | Thermostatic valve for compensating air fuel mixture for air temperature change | |
| JPH0159441B2 (en) | ||
| US6244227B1 (en) | Valve assembly using pressurized medium for controlling operating conditions of a two-stroke engine | |
| KR840002466B1 (en) | Intake system of engine | |
| US4228774A (en) | Control apparatus for supercharged fuel injection engines | |
| US5427063A (en) | Variable compression ratio cylinder | |
| US6199822B1 (en) | Fluid-operated actuator | |
| GB2085086A (en) | Carburettor throttle valve idling stop control | |
| US4478107A (en) | Suction cap for an automatic gearbox | |
| US4033232A (en) | Charge forming device | |
| KR910010172B1 (en) | Fuel pressure regulator for internal combustion engine | |
| KR910006517Y1 (en) | Boost compensator | |
| JPS6350534Y2 (en) | ||
| CA1144438A (en) | Reciprocating motor with adjustable stroke | |
| US4918924A (en) | Turbocharging pressure controlling apparatus | |
| US3705685A (en) | Engine idle speed governor and throttle control | |
| CA1114253A (en) | Accelerator pump for carburetor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |