US3898973A - Device for controlling the feeding of fuel to an internal combustion engine - Google Patents

Device for controlling the feeding of fuel to an internal combustion engine Download PDF

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Publication number
US3898973A
US3898973A US350651A US35065173A US3898973A US 3898973 A US3898973 A US 3898973A US 350651 A US350651 A US 350651A US 35065173 A US35065173 A US 35065173A US 3898973 A US3898973 A US 3898973A
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United States
Prior art keywords
sleeve
spindle
control element
passageway
throttle member
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Expired - Lifetime
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US350651A
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English (en)
Inventor
Marcel Vidberg
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Automobiles Peugeot SA
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Automobiles Peugeot SA
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Publication date
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    • 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
    • F02M19/00—Details, component parts, or accessories of carburettors, not provided for in, or of interest apart from, the apparatus of groups F02M1/00 - F02M17/00
    • F02M19/12—External control gear, e.g. having dash-pots
    • F02M19/128—Reserve throttle idle return spring, e.g. for use upon failure of the main spring

Definitions

  • the spindle and sleeve are relatively rotatable and the sleeve is rotatable in the carburetor body.
  • An electromagnetic coupling normally interconnects the spindle and sleeve but is capable of disconnecting the spindle and sleeve in the event of malfunctioning of the device.
  • Separate springs bias the spindle and the sleeve toward positions normally corresponding to a position of the throttle member substantially closing the induction passage.
  • the present invention relates to devices for controlling the feeding of fuel to an internal combustion engine and in particular an engine equipped with at least one carburetor.
  • Control devices for a carburetor are known in which there is provided between the control element actuated by the user and the throttle member an electromagnetically-controlled coupling which, in the event of a breakdown in the transmission of the motion between the actuating element and the throttle member, is adapted to release the throttle member and allow its return to a position in the vicinity of the idling speed position under the action of a return spring.
  • Such a device is simple in construction but does not permit avoiding all the dangers of the sticking of the throttle member in a partly or completely open position, this sticking being, for example, due to seizure or jamming of the spindle of the throttle member in the body of the carbure' tor. Now, such seizure does sometimes occur and may be such as to require a tool to free the two seized parts.
  • the engine is continued to be fed with fuel whereas the user may have ceased to depress the accelerator pedal so that there is a definite hazard and a risk of a serious accident.
  • Some other malfunctioning may occur in the transmission of motion between the element actuated by the user and the throttle member, such as the sticking of the cable or linkage, or the unhooking of the return spring.
  • An object of the present invention is to preclude such malfunctioning and thereby improve the safety.
  • the invention provides a device for controlling the feeding of fuel to an internal combustion engine, comprising a fuel feed flow regulating means, resiliently yieldable means for returning said flow regulating means to its closing position, and a control element actuated by the user and connected to the regulating means through connecting means including an electromagnetically controlled coupling, wherein the regulating means is carried by a first member and the control element is connected to a second member, said two members are concentric and interconnected in the position for normal operation by the coupling, and a separate resiliently yieldable return means is provided for each of said members.
  • control element actuated by the user is integral with a sleeve rotatably mounted in a fixed body and the regulating means for the throttle member is integral with a spindle rotatably mounted in the sleeve, the coupling is disposed in the vicinity of two adjacent ends of the spindle and the sleeve, and the resiliently yieldable return means act respectively on the sleeve and on the spindle.
  • two idling speed control screws respectively associated with the sleeve and the spindle are provided, the adjustment of the screws being preferably slightly staggered.
  • FIG. 1 is a diagrammatic view of a control device according to the invention
  • FIG. 2 is a perspective view, with parts cut away, of a first embodiment of the mechanical part of the device
  • FIG. 3 is a sectional detail view taken on line 3-3 of FIG. 2;
  • FIG. 4 is a side elevational view of a second more elaborate embodiment of the device according to the invention.
  • FIG. 5 is a sectional view taken on line 55 of FIG. 4.
  • FIG. 1 shows a control device comprising an accelerator pedal 1 which acts through a lever 2 on a cable 3 connected to a control element or sector 4 whose connection with the fuel regulating throttle member will be described in more detail hereinafter.
  • the element 4 comprises an electromagnet 5 whose supply circuit connected to the battery 6 of the vehicle includes in series: two switches 7, 8 and a delay device 9, the switch 7 being controlled by a cam 10 integral with the control element 4 whereas the second switch 8 is controlled by the accelerator pedal.
  • the pedal is constituted by a plate 11 of synthetic material which is secured at its lower end 11a to the body of the vehicle and in which a portion 12 of reduced section constitutes a pivot.
  • This plate receives on a lower surface a second rigid plate 13 which is maintained in a flexible manner by a foil or sheet 14 and carries the switch 8 whose push-member 15 bears against the accelerator pedal 1.
  • a spring 16 maintains the switch in its normal position for closing the circuit.
  • the device is applied to a duplex or twin carburetor, but it will be understood that this arrangement is also applicable to a single carburetor.
  • the two bodies 20, 21 of the duplex carburetor contain two throttle members 22, 23 integral with a spindle 24, 25 respectively.
  • Each spindle is mounted to freely rotate in a sleeve 26, 27 which is apertured so as to permit the passage of the throttle member and is rotatably mounted in bearings 28, 29 formed in the bed res.
  • the sleeve 26 is integral with the control element 4 shown in FIG, 1 and with a radial tab 30 integral with a lug or pin 31.
  • This pin is received in an oblong aperture 32 formed in a lever 33 which is capable of rotating with respect to the sleeve.
  • the control element defines on its side remote from the body of the carburetor a cylindrical sleeve 34 around which is wound a spring 35 which bears against the carburetor body and biases the assembly to the throttle-closing position.
  • This control element also comprises the cam 10 acting on the switch 7 and a tab 36 on which an idling speed screw 37 is mounted.
  • the screw 37 co-operates with a corresponding abutment 38 formed on the body of the carburetor.
  • the spindle 24 carrying the throttle member extends out of the sleeve 34 and has splines 39 co-operating with corresponding splines 40 provided on a cup 41 which is slidably mounted and comprises along its edge clutch portions 42, such as dog-clutch portions, which are normally engaged with clutch portions 43 of corresponding shape provided on the element 4.
  • the end portion of the spindle 24 is integral with the electromagnet 5 and, provided between the latter and the cup 41, is a spring 44 which biases the cup toward the position in which the spindle 24 is coupled to the sleeve 26 integral with the element 4.
  • the spindle 24 is integral with a lever 45 also carrying an idling speed screw 46 which co-operates with a corresponding support surface 47 proyided on the carburetor body, this lever being biased toward the closing position of the throttle member by a spring 48 reacting on the adjacent end of sleeve 26.
  • the lever also carries a pin or lug 49 received in an aperture 50 which has a shape corresponding to that of the aperture 32 and is formed in a plate or lever 51 which is rotatably mounted on the spindle 24 and is part of a connection with the second 'body 21 of the twin carburetor.
  • the sleeve 27 isintegral with a lever 52 which is'connected to the lever 33 through a rod 53 and also carries an idling speed screw 54 which co-operates with a corresponding support surface 55 provided on the body 21.
  • a spring 56 biases the sleeve 27 toward the position for closing the throttle member 23.
  • the spindle 25 carrying the throttle member 23 is received in the sleeve 27 to rotate freely therein and carries a radial lever 57 connected through a rod 58 to the plate 51 and an idling speed screw 59 which cooperates with an abutment 60 on the second body 21 of the carburetor.
  • Another spring 61 acts between the body 21 and the spindle and biases the latter to the position for closing the throttle member.
  • FIG. 3 shows in more detail the assembly of the spindle 25 of the second body of the carburetor with its sleeve 27.
  • this spindle carrying the throttle member 23 is freely received in the sleeve, these two elements should be placed in such position that the throttle member is capable of effecting, in the case of malfunctioning, a rotation with respect to the sleeve so that it is able to move, for example, from a position of full opening to an idling speed position or a position in the vicinity of the idling speed position.
  • the spindle 24, the throttle member 22, the sleeve 26, the controlelement 4 are integral with each other and constitute a moving assembly which is rotated with respect to the body 20 by the cable 3 which is shifted by the accelerator pedal 1. This moving assembly is normally returned by the spring 35.
  • the pins 31, 49 abut the ends of the oblong apertures 32, 50 and thus bring the part of the carburetor associated with the second body 21 into action.
  • the switch 8 is adapted to be normally in its closed position and to open only when pressure exerted on the accelerator pedal depresses the push-member 15.
  • the switch 7 is only in its open position when the sector or the control element 4 has been returned to its position of rest or the idling speed position. If some defective operation occurs in the kinematic chain between the accelerator pedal and the throttle member, for example sticking of the cable 3, unhooking of the main spring 35 or seizure of the spindle carrying the throttle member, and if the throttle member 22 is not in its idling speed position, the switch 7 is closed and, as soon as the user releases the pressure on the accelerator pedal, the switch 8 also closes. The circuit diagram shown in FIG. 1 is then closed and the electromagnet 5 is energized.
  • the delay means 9 in the circuit avoids an excessively rapid operation of the device, for example in the case where the foot of the user accidentally slips on the accelerator pedal.
  • the device according to the invention affords perfect safety in all possible failures or breakdowns owing essentially to the use of the two concentric elements 24, 26, of which one is connected to the throttle member and the other to the control element 4, these two elements being normally integral with each other but released when some defective operation occurs and each one being provided with a separate resiliently yieldable return means or spring for returning it to the idling speed position.
  • this second return spring guarantees safe operation in the event of breakage of. the main return spring. Complete safety is also ensured in the event of seizure of the sleeve in its bearings owing to the fact that as the spindle and the sleeve are normally stationary with respect to each other, their facing surfaces undergo no wear. It is merely necessary to verify periodically that this rotation occurs freely, for example on the occasion of engine inspection every five or ten thousand kilometres.
  • FIGS. 4 and 5 show a slightly more complex embodiment which however includes. the main features of the device shown in FIG. 2.
  • the cQrreSpOnding elements V known means for ensuring, at the end. of the opening travel of the throttle member, an additional travel of the actuating mechanism should the vehicle be equipped with an automatic gearbox and the accelerator pedal must be capable of effecting, beyond its position corresponding to maximum opening of the throttle members, an additional travel corresponding to a kickdown ensuring in the automatic gearbox the change from a given speed ratio to an immediately lower speed ratio.
  • This is achieved owing to the provision of a device having a lost motion which will not be described in detail and also to the provision, in association with the second body 21 of the carburetor, of two additional springs designated by reference numbers 73 and 74.
  • a device for controlling the feeding of fuel to an internal combustion engine comprising a body defin; ing a passageway, a fuel feed flow regulating means movable between a first position for opening the passageway and a second position for substantially closing the passageway, a control element for actuation by the user, connecting means operatively connecting the control element to the regulating means, the connecting means comprising a first member carrying the regulating means, a second member integral with the control element, bearing means within said body, the second member having a tubular portion rotatably mounted in said bearing means and extending transversely through said passageway the first member having a generally, cylindrical shape and being rotatably mounted in said second member, aperture means being defined by the cylindrical portion of the second member for allowing passage of the regulating means therethrough, a releasable coupling interposed between the first member and the second member for normally engaging the'second member with the first member to drive the first member, electromagnetic means for releasing the coupling, first resiliently yieldable return means associated with the first member,
  • a device for controlling a feeding of fuel to an internal combustion engine comprising a carburetor body defining an induction passageway, a throttle lmember movable between a first position for opening the passageway and a second position for substantially closing the passageway a control element for actuation by the user, connecting means operatively connecting the control element to the throttle member, the connecting means comprising a spindle carrying the throttle member, a sleeve integral with the control element, said sleeve being rotatably mounted in bearing means provided into said carburetor body and defining aperture means; the spindle being coaxial with and rotatable within the sleeve and the throttle member extending through said aperture means of the sleeve, a releasable coupling interposed between the spindle and sleeve for normally engaging the sleeve with the spindle, to drive.the spindle, electromagnetic means for releasing the coupling, first resiliently yieldable return means associated with the spindle, and second
  • said first return means is a torsion spring, provided between said spindle and said sleeve, said second return means being a torsion spring provided between the body and said sleeve.
  • the coupling comprises an intermediate member mounted on the spindle to rotate with but to slide axially on the spindle, a clutch device having first teeth associated with the intermediate member and second teeth which are associated with the sleeve and are drivingly engageable with the first teeth, third resiliently yieldable means for biasing the first and second teeth into engagement, the electromagnetic means being associated with the intermediate member to shift the first and second teeth out of engagement.
  • a device as claimed in claim 5, comprising an annular portion integral with the sleeve and the control element and enclosing the clutch device and the electromagnet, the third resiliently yieldable means being interposed between and engaging the intermediate member and the electromagnetic means which electromagnetic means is integral with the spindle.
  • a device as claimed in claim 1, comprising first adjustable abutment means associated with the first member and second adjustable abutment means associated with the second member for respectively determining the idling speed positions of the first and second members.
  • a device'for controlling the feeding of fuel to an internal combustion engine comprising a duplex or twin carburetor having a first body defining a first induction passageway and a second body defining a sec ond induction passageway, and, in association with each carburetor body and passageway: a throttle member movable between a first position for opening the associated passageway and .a second position for substantially closing the associated passageway, a control element for actuation by the user, connecting means operatively connecting the control element to the throttle member, the connecting means comprising a spindle carrying the throttle member, a sleeve integral with the control element, the spindle being coaxial with and rotatable within the sleeve and the sleeve being mounted to rotate relative to the associated body, a releasable coupling interposed between the spindle and sleeve for normally engaging the sleeve with the spindle associated with the spindle and second resiliently yield 1 able return means associated with the sle
  • said first return means is a torsion spring. provided between said spindle and 'said slee've, said second return means being a torsion spring provided between the body and said sleeve.
  • a device as claimed in claim 8, comprising, for each carburetor body, first adjustable abutment means associated with the corresponding spindle and second dle which is associated with the first carburetor body to 10 adjustable abutment means associated with the correthe spindle which is associated with the second carburetor body and third connecting means operatively connecting the sleeve which is associated with the first carburetor body to the sleeve which is associated with sponding sleeve for respectively determining the idling speed. positions of the corresponding spindle and sleeve.

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  • 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)
US350651A 1972-05-25 1973-04-12 Device for controlling the feeding of fuel to an internal combustion engine Expired - Lifetime US3898973A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7218713A FR2186069A5 (enrdf_load_stackoverflow) 1972-05-25 1972-05-25

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US3898973A true US3898973A (en) 1975-08-12

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US350651A Expired - Lifetime US3898973A (en) 1972-05-25 1973-04-12 Device for controlling the feeding of fuel to an internal combustion engine

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US (1) US3898973A (enrdf_load_stackoverflow)
DE (1) DE2311198C3 (enrdf_load_stackoverflow)
FR (1) FR2186069A5 (enrdf_load_stackoverflow)
GB (1) GB1425133A (enrdf_load_stackoverflow)
IT (1) IT980419B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4122819A (en) * 1976-09-22 1978-10-31 Hyster Company Fuel supply control and carburetor linkage mechanism
US4155418A (en) * 1976-06-03 1979-05-22 Bombardier Limited Snowmobile engine safety cut out system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3340127C2 (de) * 1983-11-05 1985-10-24 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart Schwenkbares Verschlußorgan
DE3426791A1 (de) * 1984-07-20 1986-02-06 Voest-Alpine Friedmann GmbH, Linz Notabstelleinrichtung fuer brennkraftmaschinen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3698372A (en) * 1971-06-08 1972-10-17 Holley Carburetor Co Throttle return spring redundancy system
US3722492A (en) * 1969-12-26 1973-03-27 Honda Motor Co Ltd Apparatus for forcibly closing an engine throttle valve
US3722491A (en) * 1969-12-16 1973-03-27 Honda Motor Co Ltd Apparatus for insuring automatic closure of an engine throttle valve upon release of the accelerator pedal
US3731667A (en) * 1970-11-10 1973-05-08 C Macmillan Fail-safe throttle control

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3722491A (en) * 1969-12-16 1973-03-27 Honda Motor Co Ltd Apparatus for insuring automatic closure of an engine throttle valve upon release of the accelerator pedal
US3722492A (en) * 1969-12-26 1973-03-27 Honda Motor Co Ltd Apparatus for forcibly closing an engine throttle valve
US3731667A (en) * 1970-11-10 1973-05-08 C Macmillan Fail-safe throttle control
US3698372A (en) * 1971-06-08 1972-10-17 Holley Carburetor Co Throttle return spring redundancy system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4155418A (en) * 1976-06-03 1979-05-22 Bombardier Limited Snowmobile engine safety cut out system
US4122819A (en) * 1976-09-22 1978-10-31 Hyster Company Fuel supply control and carburetor linkage mechanism

Also Published As

Publication number Publication date
DE2311198C3 (de) 1974-10-31
FR2186069A5 (enrdf_load_stackoverflow) 1974-01-04
IT980419B (it) 1974-09-30
DE2311198A1 (de) 1973-12-06
DE2311198B2 (enrdf_load_stackoverflow) 1974-04-04
GB1425133A (en) 1976-02-18

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