EP0034936B1 - Dispositif de commande de l'écoulement d'un fluide par un orifice - Google Patents

Dispositif de commande de l'écoulement d'un fluide par un orifice Download PDF

Info

Publication number
EP0034936B1
EP0034936B1 EP81300737A EP81300737A EP0034936B1 EP 0034936 B1 EP0034936 B1 EP 0034936B1 EP 81300737 A EP81300737 A EP 81300737A EP 81300737 A EP81300737 A EP 81300737A EP 0034936 B1 EP0034936 B1 EP 0034936B1
Authority
EP
European Patent Office
Prior art keywords
armature
coils
spring means
spring
fuel
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
Application number
EP81300737A
Other languages
German (de)
English (en)
Other versions
EP0034936A1 (fr
Inventor
Charles F. Lloyd
Z. Leo Zalewski
Paul C. Brendle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CTS Corp
Original Assignee
CTS Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CTS Corp filed Critical CTS Corp
Publication of EP0034936A1 publication Critical patent/EP0034936A1/fr
Application granted granted Critical
Publication of EP0034936B1 publication Critical patent/EP0034936B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1477—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation circuit or part of it,(e.g. comparator, PI regulator, output)
    • F02D41/1484—Output circuit
    • 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
    • F02M3/00—Idling devices for carburettors
    • F02M3/08—Other details of idling devices
    • F02M3/09—Valves responsive to engine conditions, e.g. manifold vacuum
    • 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
    • F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
    • F02M7/12—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves
    • F02M7/18—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel-metering orifice
    • F02M7/20—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel-metering orifice operated automatically, e.g. dependent on altitude

Definitions

  • This invention relates to an apparatus for remotely controlling the fuel/air supply to an internal combustion engine.
  • Prior art devices for fluid flow control at an orifice include various solenoid operated members. Upon electrical energisation of the solenoid to control the position of an armature, the armature in turn controls an actuator rod with an orifice-controlling end portion.
  • the orifice control provides an effective input control regulating the amount of volatilizable fuel which is metered to a carburettor, with the aim of controlling fuel flow in relation to carburettor function so that the fuel is most efficiently burned.
  • these parameters as determined by the sensors are communicated to a micro- processor of conventional design.
  • the micro- processor in turn has a system of logic and algorithm whereby the inputs from the sensors are transduced into an electrical signal.
  • the electrical signal is either a digital signal with a binary type wave output or an analog signal in which the amplitude of the signal is related to and effects a control function in accordance with the degree of amplitude of the output signal.
  • U.S. Patent No. 4129105 reveals one known method and apparatus, which remotely controls an auxiliary air supply to an internal combustion engine, continuously senses the physical data relevant to efficient fuel burning, continuously supplies the information to a micro-processor in order to effect a transduced electrical signal, communicates the said signal to a rectilinearly movable actuator in the form of an armature having a pair of coils surrounding an iron core, and utilises the movement of the armature to effect adjustment of a butterfly valve in the air supply. The effect of an adjustment is in turn sensed, so that a closed loop control network is formed.
  • a modified armature utilises a single coil cooperating with a permanent magnet.
  • components which are theoretically capable of achieving the foregoing results are either too expensive and must be custom constructed, or do not lend themselves to large scale manufacture and a capability of proper functioning within the range of the expected stack-up of tolerances and overall operating conditions encountered in conventional internal combustion engines.
  • the invention provides an apparatus for remotely controlling the fuel/air supply to an internal combustion engine, comprising remotely disposed sensors continuously measuring physical data pertaining to gas analysis, throttle operation, and pressure and/or temperature, means comprising a micro- processor continuously supplied with signals corresponding to the data information and effecting a transduced electrical signal, an electromagnetic drive device to which the signal is communicated and having an armature connected to a control member to control the fuel/air supply to the internal combustion engine, the electromagnetic device being instantaneously and linearly responsive to the transduced electrical signal, the effects of the changed air/fuel supply in turn being sensed, whereby a closed loop control network is formed and a resilient biassing means determining a predetermined position of said armature, characterised in that the armature is formed by a longitudinally movable permanent magnet with north and south pole portions and associated axially spaced longitudinal coils. each surrounding a respective pole portion, the coils having longitudinal dimensions encompassing circumferentially each pole portion throughout the effective range of longitudinal movement of the latter.
  • a pair of springs are preferably provided, which are adjustable in spring tension and can effectively determine the critical operating characteristics of the armature.
  • the described armature-coil arrangement is virtually instantaneously and linearly responsive to transduced electrical signals derived from critical sensor elements which continuously monitor the temperature, pressure, throttle conditions and oxygen content.
  • These sensors are continuously in communication with a microprocessor which develops a corresponding signal of either digital or analog characteristics, such signal being continuously received and transduced into mechanical movement by the development of current within the coils of the electromagnet of a magnitude appropriate to the incoming micro- processor signal (of either digital or analog wave form) and the armature thereafter displaces or positions the orifice-controlling member in relation to the orifice.
  • the present invention provides a unique and effective combination of fuel-metering control in relation to sensors and microprocessors to secure continuous relatively pollution-free and efficient engine operation and does so by means of individually adjustable armatures which are spring adjusted by mechanical adjustment means, in which the spring rate and spring response can be independently adjustable.
  • a plurality of spaced sensors are designated generally by reference numerals 10, 12, 14 and 16.
  • the sensors will be disposed at various locations on a vehicle and are particularly adapted to provide continuous measurements of operating parameters to a microprocessor 18 of conventional configuration.
  • the microprocessor is not a part of the present invention, per se, but a typical microprocessor is available for purposes of the present invention in the form of an electronic control module which contains the necessary program and system of algorithm.
  • the sensors which are of conventional design, are intended to provide such parameters as oxygen content in the exhaust, and are designated generally as oxygen sensor 10, pressure sensor 12, cooling temperature sensor 14, closed throttle sensor 16, and if required an ambient pressure sensor which is not shown. These sensors continuously provide monitored information to the microprocessor which in turn communicates an algorithm signal to a remote actuator or control device 20.
  • an actuator device now referenced 22 is associated with and operates the fuel-metering rod 23 of a carburettor, having an end 24 movable in relation to a fixed fuel-metering orifice 26 defined by a throat section 28 of a Venturi.
  • the control mechanism 22 displaces an armature bracket 30 one end 34 of which is positioned to bear against a lean mixture stop 36.
  • the opposite side of the bracket is positioned to bear against a rich mixture stop 38.
  • the two stops 36 and 38 are threaded for micrometric adjustments relative to respective co-acting supports 40, 42.
  • the armature bracket 30 also operates an idle bleed air valve 43 through a spool valve 44 having a valve rod 46 which has rod end 48 in contact with bracket end 35, so that movement of armature bracket 30 controls both the effective cross sectional area of the fuel-metering orifice 26 and the idle bleed air valve 43.
  • an armature 50 operates downwardly (arrow 21) to displace a connector means 52, thereby determining the operative position for the fuel-metering rod 23 and valve rod 46 of Figure 2.
  • means 52 is displaced, this is against the bias of a spring 54.
  • the armature 50 operates in a digital mode and is responsive to a binary energizing input signal such as that shown in Figure 9, i.e. the armature is either energised to be pulled to a fully-down position or when unenergised it is moved by the spring 54 to an up position.
  • the technique of control is that in one mode, i.e. energised or "on” mode the device determines a lean mixture, and in an unenergised or “off” mode with the spring 54 displacing the connector means 52 upwardly, the engine being controlled operates in a rich mixture mode.
  • the overall control operation consists in integrating the number of "on” and “off” positions so that the integration of the totality of the "on” and “off” modes will result in an appropriate air-fuel ratio.
  • the armature 50 which displaces the connector means 52 does so responsive to energisation by two spaced sets of coils 56 and 58, which are wound on a bobbin 60.
  • the armature 50 consists of a permanent magnet 62 having two pole pieces 64 and 66, the characteristics of which make the armature linearly displaceable under a constant force responsive to the generation of current within the coils. It is an important characteristic of the invention that a digital signal in the form of binary signals effects a rapid acceleration of the armature, displacing it on a time basis almost instantaneously in a downward movement against the biassing spring 54, and immediately upon de-energisation of the coils the electromagnet will be virtually instantaneously linearly displaced in the opposite direction by means of the compressed biassing spring 54.
  • the above described armature-coil arrangement is susceptible to a signal of digital form (see Figure 9) derived from the sensors and microprocessor also previously referred to.
  • a signal of digital form Surrounding the coils is a magnetically permeable casing 68 which serves to contain the coils 56, 58, and the bobbin 60 provides a stop 70 limiting downward movement of the armature 50 when it is energised.
  • the upward movement of the armature effected by the spring 54 displaces the connector means 52 upwardly until it engages a rich mixture stop 38 micrometrically adjusted relative to the support 42 as illustrated in Figure 2.
  • the microprocessor 18 ( Figure 1) supplies a signal to the coils 56, 58, causing them to be energised to an "on" mode, thereby drawing the armature 50 downwardly against the resistance of the spring 54 as before described.
  • the cycle is adjusted so that it is effective from 15 to 85% of the time. i.e. the actuator device is in an "on" mode between 15 to 85% of the duty cycle, the total time duration of which is typically about 100 milliseconds, with the signal varying from zero to plus 12 volts.
  • the microprocessor may be one which is fully exemplified within the context of the C-4, Computer Control Catalytic Converter system described in the "Citation" Shop Manual ST365-80, pages 8A-64, 65 and 66, a publication by General Motors, Chevrolet Division.
  • the apparatus as described in relation to the actuator device of Figure 3 is alternatively usable with a binary digital signal having a wave characteristic such as that illustrated in Figure 9(a), wherein the binary signal wave varies from plus one to minus one.
  • the coils are energised in either one of opposite directions of current flow, and the spring 54 and another oppositely compressible spring (not shown) are utilised to achieve a "neutral" position for the armature.
  • the latter is then either energised positively in an up direction or positively in a down direction against the coacting and oppositely compressible springs which in the absence of energisation of the coils cause the armature to be spring displaced to a neutral position corresponding to an average amplitude of zero of the wave.
  • the coils are energised with current flow in one direction to effect a downward force of the armature 50 against the resistance of the spring 54, and when the wave goes negative, i.e. to minus one during the duty cycle of approximately 100 milliseconds, the current direction is reversed to cause an upward, force of the armature 50 against the resistance of the oppositely compressible spring (not shown).
  • the resultant net position of the armature 50 and the connector means 52 will be determined according to the time average of the magnetic forces and the spring characteristics.
  • an actuator device having an armature 50 with pole pieces 64 and 66, one at each of the opposite ends of the permanent magnet 62, and a pair of coils 56, 58.
  • the coils are again wound on a bobbin 60 disposed within casing 68.
  • an elongated rod 72 of armature 50 has at an end 74 thereof an orifice controlling metering pin 78 which effectively defines the operative cross-sectional area of an air- metering orifice 80 adapted to control the amount of idle bleed air in a somewhat different manner than that illustrated in Figure 2.
  • At the lower end of the armature 50 is an elongated rod 81 having a metering pin 82 controlling the effective cross-sectional area of a fuel metering orifice 84 again in a somewhat different manner than that illustrated in Figure 2.
  • a coil spring 86 bearing at one end against an annular boss 88 in an elongated sleeve 90 and at the opposite end bearing against the pole piece 64, thereby urging the armature 50 upwardly in an orifice opening direction in relation to fuel-metering and in an orifice closing direction in relation to air control.
  • This monitoring and control of the fuel-air ratio is effected by the movements of a throttle valve being sensed by sensors in a closed-loop servo system, which sensors in turn actuate the microprocessor, the microprocessor in turn developing the duty cycle as illustrated in Figure 9 and the binary signal then being used as the operating parameter for the armature 50.
  • the engine operating conditions are continuously sensed, which includes the monitoring of oxygen flow in the exhaust system, the sensing of temperature, pressure and throttle condition, and responsively to those conditions through the microprocessor there is a corresponding position of the fuel and air control members in the throttle valve to adjust the engine to the appropriate operating conditions relative to the information sensed by the sensors.
  • an actuating device which operates on an "analog" principle, i.e. in this embodiment the device is intended to provide not merely an on-off operation but a continuous monitoring of orifice size micrometrically.
  • an ability to control the effective cross-sectional area of the orifices not merely on a statistical on-off basis with the averaging principle utilised for achievement of the correct air-fuel ratio, but instead the positioning of the metering pins relative to the orifices is measured continuously and is adjusted by means of an analog signal in the manner which will next be described.
  • an armature 50 having two pole pieces 64, 66 which are displaced by means of closely surrounding circumposed coils 56, 58, respectively.
  • the coils are wound on a bobbin 60.
  • a closely surrounding casing 68 which is magnetically permeable as before described.
  • At the one end of the armature there is an elongated rod 72 and a metering pin 78 which controls the effective cross-sectional area of the air metering orifice 80 thereby to determine one portion of the air-fuel ratio.
  • At the bottom part of the armature is an elongated rod 81 with a metering pin 82 that controls the effective cross-sectional area of the fuel-metering orifice 84.
  • the position of the metering pin 82 relative to the orifice 84 determines the quantity of fuel that is delivered through the carburettor to the engine.
  • the movement of the armature 50 is also controlled by means of two spaced springs 86 and 86a.
  • Spring 86 is compressed between an adjustable nut 92 which is threadedly received on the threaded outer surface of the elongated rod 81 and bears at the other end against a seat 98 of the bobbin 60.
  • the second spring 86a is compressed between a fixed seat 100 and an adjustable nut 102 which is also threadedly received on the threaded outer surface of the elongated rod 81.
  • the springs 86, 86a according to their adjustment by the associated nuts 92 and 102 determine the neutral position of the armature, i.e. the position which the metering pins assume relative to the metering orifices when there is a condition of no signal or when there is a zero time-averaged value of current in the coils 56 and 58.
  • the sensors act through the micro- processor in the manner before described but the algorithm of the microprocessor develops either a binary output signal as illustrated in Figure 9(a), or an analog signal such as illustrated in Figure 10, thereby effecting a metering of the effective cross-sectional areas of the air- metering orifice 80 and fuel-metering orifice 84 by the metering pins 78 and 82, respectively, to achieve the appropriate air-fuel ratio in accordance with the parameters of oxygen content, pressure, temperature, throttle position etc., these all being parameters sensed by the sensors for processing through the micro- processor in a closed-loop servo system.
  • the described embodiment is responsive to a continuous sensing by the sensors and positions the metering pins relative to the air and fuel orifices thereby determining the operating characteristics of the engine, which develops outputs again continuously sensed by the sensors so that there is a closed loop feedback system: first by the output parameters sensed by the sensors and then the positioning of the fuel-air ratio metering pins that in turn determine the output characteristics of the engine.
  • the armature, bobbin, coil and casing are virtually the same as before described.
  • the metering pin 82 which has the form of constant cross-sectional area metering pin 82a in Figure 6, and likewise metering pin 78 is replaced by a constant cross-sectional area metering pin 78a.
  • the characteristics of the device in Figure 6 can be varied by means of a spring 104 compressed between a fixed seat 101 on the bobbin 60 and a single adjustable nut 106 threadably received on an elongated rod 81 and a spring 105 compressed between the nut 106 and a shoulder 107 in an elongated sleeve 90.
  • Adjustment of the nut 106 determines the neutral position of the armature 50.
  • the "gain" is a variation in the response of the device to an energising signal and may be varied by the original adjustment of the device but remains relatively fixed thereafter.
  • the current magnitude in the coils effects a particular positioning of the metering pins 78a, 82a by micrometric adjustments in accordance with the time-average value of the digital signal of Figure 9(a) or the amplitude of the analog signal ( Figure 10).
  • the actuator device is again responsive to a time-average value of the digital signal of Figure 9(a) or the analog signal of Figure 10 for micrometric adjustment of the air and fuel orifices by co-acting metering means.
  • the metering of the orifices is accomplished by the device generally described previously in relation to Figures 2 and 3, but there is a variation in the response of the device by means of a particular placement of springs. Because of the slight differences in construction, the entirety of the device will be described.
  • the armature 50 consists of a permanent magnet 62 with two opposite pole pieces 64, 66 secured to end portions of the magnet.
  • a magnetically permeable casing 68 surrounds the coils and assists in directing the magnetic flux during energisation of the coiis.
  • a fixed bridge 108 includes a nut 110 which is adjustable relative to the bridge.
  • the nut 110 is rotated in order to displace longitudinally a ccil spring 112 one end of which is threadably received by the nut and the other end of which is screwed into and secured in the pole piece 66. Therefore, by rotating the nut 110 it is possible to control the spring position and thus determine the null or neutral position of the armature 50 and the driveplate 52a at the time when no current is developed in the coils.
  • Another adjustment is provided by an internal screw 114 that screws within the inner diameter of the coil spring 112, and is received through an interior opening of the nut 110 and within the coil spring 112 so that as it is turned downwardly it determines the effective number of spring coils that are operative under compression or expansion at any given armature position.
  • the "gain” is thus controlled once the spring has been positioned by rotation of the nut 110.
  • the effective length of the spring 112 together with its spring rate are the two adjustment characteristics which enable the user to vary the static position and response of the device to a given input signal. These two adjustments are relatively easy to obtain and can be carried out not only initially to calibrate the apparatus but also are available throughout the operation of the apparatus to optimise its operation for certain operating conditions.
  • the actuator device is calibrated initially to be responsive to the signals from a microprocessor 18 on a continuous basis, the microprocessor output signal being related to the conditions of operations as determined by the sensors 10, 12, 14 and 16.
  • the microprocessor output signal is related to the conditions of operations as determined by the sensors 10, 12, 14 and 16.
  • the output is in the form of digital binary signal supplied continuously to the air-fuel ratio actuator designated generally by reference numeral 20.
  • the signal which is utilised for the device in Figure 3, is a binary signal having a wave form as shown in Figure 9, i.e. a recurring pulse signal having a duty cycle of approximately 15 to 85 percent.
  • the plus one pulse is communicated to the spaced coils 56 and 58 as a current which effects displacement of the armature 50 consisting of the permanent magnet 62 of two pole pieces 64 and 66.
  • Actuation of the armature 50 causes displacement of the connector means 52 in a downward direction indicated by the arrow 21 in Figure 3 and produces a selective positioning of the valve rod 46 and the fuel-metering rod 23 illustrated in Figure 2.
  • These two control members thereby determine the amount of fuel which is effectively metered through orifice 26 and the amount of idle bleed air controlled by the spool valve 44. This determines the air-fuel ratio which is carburetted and then communicated to the cylinders of an internal combustion engine (not shown).
  • the amplitude returns to zero thus de- energising the coils 56 and 58 of the device 19 ( Figure 3) and the spring 54 then restores the means 52 to its neutral or null position thereby repositioning the idle bleed air spool valve 44 and the fuel-metering rod 23, and once again changing the amount of metered fuel and metered air and thus affecting the air-fuel ratio once again.
  • the wave pattern can be varied as to the duty cycle and time interval, i.e. any portion of the wave from zero to 100 percent can be utilised. It is also an important feature of the invention that there is nearly an instantaneous response corresponding to a signal from zero to one. However, the response time of such a signal and the task of attempting mechanically to transduce that signal into the nearly instantaneous positioning of valves has proved quite difficult in the art; a characteristic of the invention is that it does have such an almost instantaneous response.
  • the required current magnitude for full energisation of the coils in the device is almost instantaneously achieved because of the constructional features of the combination armature, bobbin and casing.
  • the response of the armature to coil energisation for mechanical transducing, i.e. positioning of the metering rod 23 and valve 44 relative to the metering orifice 26 and idle bleed air valve 43, is that immediately upon build up of current in the coil there is an instantaneous force developed on the armature, and the armature is of such size and magnetic coupling qualities with the field that it develops an almost instantaneous displacement and thereby a very highly responsive positioning of the valve and metering rod.
  • the actuator device of Figure 3 for example, utilises a binary signal and is constructed on the principle that there is either a rich or lean mixture at any one time instant. However, the averaging of these time instants over a larger period of time will produce the overall desired air-fuel ratio. This corresponds to the well-known principle of "averaging" to achieve the desired operating condition.
  • the microprocessor 18 responsive to the sensors 10, 12, 14 and 16 provides a signal output, the amplitude of the signal producing a corresponding current generation in the coils of the control device 20.
  • the micro- processor 18, which can produce either a digital or analog output, produces in one instance an analog signal which yields a value of current within the coils as determined by the magnitude of the signal.
  • the position of the metering pins 78 and 82 within the air and fuel metering orifices 80 and 84 is effected almost instantaneously since one of the characteristics of the actuator is the development of virtually instantaneous response because of the force developed by the armature 50 responsive to the developed current within the coils 56, 58.
  • the adjustment in this case is determined by a two-fold spring adjustment, the one consisting of a nut 110 which is rotatable relative to its support, namely fixed bridge 108, such movement being effective to advance the coil spring 112 through the central opening of the nut 110 and thereby longitudinally position the attached armature 50 to a preferred position relative to the coils 56, 58. Additionally, such an advancing movement of the coil spring 112 determines the effective number of coils that position the armature 50 when the coils are de- energised.
  • the screw 114 which can advance below the nut 110 and internally of the spring 112, the screw having the same pitch at its outer surface as the inner spring circumference whereby the screw adjusts the number of effective spring coils and thereby the response to a given signal input.
  • the first described adjustment is also effective for determining the neutral position or null position of the armature 50 including the pole pieces 64, 66 relative to the coils 56, 58.
  • a degree of adjustment of response is obtainable by virtue of the nut 110 and coil spring 112 advancing or retracting the armature 50 whereby the neutral or start position of the armature relative to the coils 56, 58 is preferably determined.
  • the limit of movement of the actuator is in one direction fixed by engagement of a portion of the drive plate with the nut 110, and is limited in the opposite direction by the engagement of the pole piece 64 with the stop 70 of the bobbin 60.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Magnetically Actuated Valves (AREA)
  • Flow Control (AREA)

Claims (4)

1. Dispositif pour commander à distance l'alimentation air/carburant d'un moteur à combustion enterne qui comprend des capteurs disposés à distance qui mesurent en continu des données physiques se rapportant à l'analyze des gaz, au fonctionnement de l'accélérateur et à la pression et/ou à la température, des moyens comprenant un microprocesseur alimentés en continu avec des signaux correspondant aux informations concernant les données et produisant un signal électrique transformé, un organe d'actionnement électromagnétique auquel le signal est communiqué et qui comporte une armature (50) reliée à un organe de commande afin de commander l'alimentation air/carburant du moteur à combustion interne, le dispositif électromagnétique répondant instantanément et de façon linéaire au signal électrique transformé, les effets du changement de l'alimentation air/carburant étant, de leur côté, détectés, formant ainsi un réseau de commande bouclé, et des moyens de sollicitation élastiques déterminant une position prédéterminée de ladite armature, caractérisé en ce que l'armature (50) est formée par un aimant permanant mobile longitudinalement (62) comportant des pôles nord et sud (64, 66) et des bobines longitudinales espacés axialement (56, 58) associées à ceux-ci, et dont chacune entoure le pôle respectif, les dimensions longitudinales de ces bobines étant telles qu'elles encerclent chaque pôle tout au long de la course effective du mouvement longitudinal de celui-ci.
2. Dispositif de commande selon la revendication 1, caractérisé en ce que le dispositif d'actionnement comprend, en outre, une tige de commande (81) fixée à ladite armature (50), deux écrous de réglage pouvant être tournés de façon indépendante (92, 102) sur une partie filetée de ladite tige de commande (81), les moyens de sollicitation élastiques comprenant des ressorts (86, 86a) ajustés individuellement par chaque écrou de réglage, l'une desdits ressorts (86) prenant appui effectivement contre une partie fixe dudit dispositif d'actionnement et sollicitant l'un des écrous de réglage (92), ainsi que la tige de commande et l'armature dans une première direction, l'autre ressort (86a) étant fixé et s'opposant au premier ressort (86) en coopération avec le second écrou de réglage (102), ce qui fait que lesdits ressorts (86, 86a) déterminent une position neutre de ladite armature (50), quand les bobines ne sont pas excitées.
3. Dispositif de commande selon la revendication 1, caractérisé en ce que ledit dispositif d'actionnement comprend, en outre, une tige de commande (81) fixée à ladite armature (50), un écrou de réglage (106) reçu sur une partie filetée de ladite tige de commande (81), des moyens de sollicitations élastiques comprenant deux ressorts opposés (104, 105) dont chacun prend appui, à l'une de ses extrémités, contre une partie fixe du dispositif et à t'autre extrémité contre la vis de réglage (106), lesdits ressorts (104, 105) déterminant la position neutre de ladite armature (50) quand les bobines ne sont pas excitées.
4. Dispositif de commande selon la revendication 1, caractérisé en ce que les moyens de solliciation élastiques comprennent un ressort (112) dont l'une des extrémités est fixée à l'armature et dont l'autre est reçue par un écrou de réglage (110), le dispositif d'actionnement comprenant également une vis (114) disposée à l'intérieur du ressort (112), et un écrou de réglage (110), ce qui fait que le réglage de l'écrou et de la vis fait varier la position neutre de ladite armature et la- réponse du ressort.
EP81300737A 1980-02-26 1981-02-23 Dispositif de commande de l'écoulement d'un fluide par un orifice Expired EP0034936B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA346476 1980-02-26
CA000346476A CA1150384A (fr) 1980-02-26 1980-02-26 Telecommande asservie pour regler l'ecoulement d'un fluide

Publications (2)

Publication Number Publication Date
EP0034936A1 EP0034936A1 (fr) 1981-09-02
EP0034936B1 true EP0034936B1 (fr) 1984-05-23

Family

ID=4116328

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81300737A Expired EP0034936B1 (fr) 1980-02-26 1981-02-23 Dispositif de commande de l'écoulement d'un fluide par un orifice

Country Status (9)

Country Link
EP (1) EP0034936B1 (fr)
JP (1) JPS57113952A (fr)
AU (1) AU540195B2 (fr)
CA (1) CA1150384A (fr)
DE (1) DE3163710D1 (fr)
ES (1) ES8206872A1 (fr)
FR (1) FR2476750B1 (fr)
GB (1) GB2077959B (fr)
IT (1) IT1144114B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5859318A (ja) * 1981-10-06 1983-04-08 Nissan Motor Co Ltd 燃料噴射ポンプの吐出量調整装置
FR2514421B1 (fr) * 1981-10-08 1988-11-18 Colt Ind Operating Corp Dispositif de commande de la proportion air-carburant fournie a un moteur a combustion interne
DE3311250C2 (de) * 1983-03-28 1985-08-01 FEV Forschungsgesellschaft für Energietechnik und Verbrennungsmotoren mbH, 5100 Aachen Vorrichtung zur elektromagnetischen Betätigung eines Gaswechselventils für Verdrängungsmaschinen
US4705012A (en) * 1985-02-16 1987-11-10 Honda Giken Kogyo Kaibushiki Kaisha Air intake side secondary air supply system for an internal combustion engine with a duty ratio control operation
DE3516917A1 (de) * 1985-05-10 1986-11-13 Pierburg Gmbh & Co Kg Elektromagnetisches, intermittierendes einspritzventil
US9464588B2 (en) 2013-08-15 2016-10-11 Kohler Co. Systems and methods for electronically controlling fuel-to-air ratio for an internal combustion engine
US10054081B2 (en) 2014-10-17 2018-08-21 Kohler Co. Automatic starting system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2392242A1 (en) * 1977-05-27 1978-12-22 Gen Motors Corp Carburettor calibration system for IC engine - has main jet regulated by taper needle moved by controlled depression
FR2424417A1 (fr) * 1978-01-16 1979-11-23 Gen Motors Corp Carburateur perfectionne et procede pour etalonner ce carburateur

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS534122A (en) * 1976-06-29 1978-01-14 Nippon Denso Co Ltd Air fuel ratio controller for internal combustion engine
JPS538431A (en) * 1976-07-12 1978-01-25 Hitachi Ltd Air-to-fuel ratio control means for engine
JPS53121163A (en) * 1977-03-31 1978-10-23 Hitachi Ltd Electromechanical converter
GB2012369B (en) * 1978-01-11 1982-05-12 Gen Motors Corp Carburettor and method of calibration
FR2429947A1 (fr) * 1978-06-28 1980-01-25 Sibe Electrovanne, notamment pour carburateur
US4292946A (en) * 1978-11-15 1981-10-06 Nissan Motor Company, Limited Air-fuel ratio control system
JPS55148924A (en) * 1979-05-09 1980-11-19 Nissan Motor Co Ltd Electronically controlled carburetor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2392242A1 (en) * 1977-05-27 1978-12-22 Gen Motors Corp Carburettor calibration system for IC engine - has main jet regulated by taper needle moved by controlled depression
FR2424417A1 (fr) * 1978-01-16 1979-11-23 Gen Motors Corp Carburateur perfectionne et procede pour etalonner ce carburateur

Also Published As

Publication number Publication date
DE3163710D1 (en) 1984-06-28
EP0034936A1 (fr) 1981-09-02
GB2077959A (en) 1981-12-23
AU6766981A (en) 1981-09-03
GB2077959B (en) 1984-11-21
FR2476750A1 (fr) 1981-08-28
CA1150384A (fr) 1983-07-19
ES499764A0 (es) 1982-09-01
ES8206872A1 (es) 1982-09-01
AU540195B2 (en) 1984-11-08
JPS57113952A (en) 1982-07-15
FR2476750B1 (fr) 1985-10-18
IT8167260A0 (it) 1981-02-25
IT1144114B (it) 1986-10-29

Similar Documents

Publication Publication Date Title
DE69306056T2 (de) Steuerungssystem zum Zuführen eines Gasstromes zu einem Gasverbrauchsapparat
US3960118A (en) Air-fuel ratio adjusting device in an internal combustion engine having a carburetor
US8950381B2 (en) Fuel supply unit
US4416239A (en) Electronic control system for an internal combustion engine with correction means for correcting value determined by the control system with reference to atmospheric air pressure
EP0692681A1 (fr) Commande à distance pour un écoulement modulé d'un bruleur à gaz et sa soupape
EP0034936B1 (fr) Dispositif de commande de l'écoulement d'un fluide par un orifice
US4366524A (en) Electromechanical transducer controlling device
ES450088A1 (es) Procedimiento y aparato para dosificar combustible.
US4884541A (en) Speed governor for small engines
US3981288A (en) Apparatus for reducing the toxic components in the exhaust gas of internal combustion engines
US6065451A (en) Bypass valve with constant force-versus-position actuator
US4300509A (en) Fuel injection and control systems
US3974813A (en) Fuel metering system for internal combustion engines
GB2046477A (en) Constraints on the duty cycle of a signal to an electromagnetic device
US3828749A (en) Fuel injection apparatus
JP2945986B2 (ja) 気体燃料の圧力調整装置
US4421089A (en) Fuel metering apparatus
US4175528A (en) Fuel supply device for internal combustion engine
GB2073318A (en) Ic engine fuel injection control system
EP0866222A3 (fr) Système de commande de l'avance à l'allumage pour moteurs industriels
US4200071A (en) Exhaust gas control system for an internal combustion engine
CA1174334A (fr) Regulateur de dosage air-carburant par retroaction
US5105791A (en) Current to pressure/vacuum transducer
GB2085618A (en) Automatic contro of air-fuel ratio in ic engines
US4291658A (en) Automotive engine carburetor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE SE

17P Request for examination filed

Effective date: 19810908

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE SE

REF Corresponds to:

Ref document number: 3163710

Country of ref document: DE

Date of ref document: 19840628

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19910122

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19910227

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19920224

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19921103

EUG Se: european patent has lapsed

Ref document number: 81300737.4

Effective date: 19920904