EP0170595B1 - Vergaser mit Startautomatik - Google Patents

Vergaser mit Startautomatik Download PDF

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Publication number
EP0170595B1
EP0170595B1 EP85401595A EP85401595A EP0170595B1 EP 0170595 B1 EP0170595 B1 EP 0170595B1 EP 85401595 A EP85401595 A EP 85401595A EP 85401595 A EP85401595 A EP 85401595A EP 0170595 B1 EP0170595 B1 EP 0170595B1
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EP
European Patent Office
Prior art keywords
engine
temperature
idling
speed
starting
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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
EP85401595A
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English (en)
French (fr)
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EP0170595A1 (de
Inventor
Bernard Martel
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Solex SA
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Solex SA
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Publication date
Application filed by Solex SA filed Critical Solex SA
Publication of EP0170595A1 publication Critical patent/EP0170595A1/de
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Expired legal-status Critical Current

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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
    • F02M1/10—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 engine temperature, e.g. having thermostat
    • F02M1/12—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 engine temperature, e.g. having thermostat with means for electrically heating thermostat

Definitions

  • the invention relates to carburetors for internal combustion engines of the type which include, for normal engine operation, a main fuel spouting system which opens into the intake duct upstream of a throttle member ( or throttle valve) controlled by the driver and - for starting and cold running the engine - an automatic starting device which includes a starting flap located in the intake duct upstream of the outlet of the main spouting system of fuel and a temperature-sensitive element, in which a material contained in a closed enclosure undergoes a variation in volume as a function of temperature, which controls the position of the starting flap and the position of minimum opening of the butterfly.
  • a main fuel spouting system which opens into the intake duct upstream of a throttle member ( or throttle valve) controlled by the driver and - for starting and cold running the engine -
  • an automatic starting device which includes a starting flap located in the intake duct upstream of the outlet of the main spouting system of fuel and a temperature-sensitive element, in which a material contained in a closed enclosure undergoe
  • Patent application FR-A-2 257 790 describes a device of the type defined above in which the temperature-sensitive element, commonly called a “wax capsule”, is subjected to the temperature of the engine cooling water.
  • a wax capsule makes it possible to exert much greater efforts than the bimetallic spirals conventionally used in starting devices. It therefore makes it possible to move elements subjected to friction or to the action of return springs and to eliminate the prior arming necessary in bimetallic spiral systems.
  • a starting device is known using a wax capsule, described in patent FR-A-2288224, which provides a partial solution to the problem by using a wax capsule which is no longer subjected to the temperature of the cooling water. , but provided with rapid electric heating means, which may consist of a resistance with a positive temperature coefficient or PCT.
  • the wax capsule is only intended to provide a forced opening of the starting flap and, consequently, only partially remedies the various problems posed by starting and cold running the engine. In particular, it does not make it possible to reduce the speed by closing the butterfly.
  • the invention aims to provide a carburetor of the type defined above provided with a starting device making it possible to take into account the various situations which may be encountered during cold starting and starting, until the engine has reached normal operating temperature. These situations may include the following.
  • the invention provides a carburetor of the type defined above, the temperature sensitive element of which is provided with a heating resistor and a temperature sensor, the starting device further comprising a computer having inputs connected to the temperature sensor and to sensors providing signals representative of the operating conditions of the engine and an output for controlling the electric power applied to the heating resistor, the sensor being provided for controlling the electric power applied to this heating resistor and to impose an opening on the butterfly and the air shutter which depends on the temperature of the temperature-sensitive element when the engine is started and on the number of revolutions made by the latter since the engine is started.
  • the carburetor comprises an idling circuit provided with a primary air supply, with a fuel supply and with an outlet of rich primary mixture in the intake duct, equipped with '' an element (such as a screw) of manual adjustment, adjusted to give the engine a richness of idling lower than that which would be necessary in the absence of regulation and this circuit is provided with a solenoid valve controlled by the organ of calculation in response to a decrease in engine speed below a predetermined threshold to increase the richness of the mixture supplied to the engine and avoid stalling.
  • the full opening of the air flap will be reached for a temperature of the sensitive element at a temperature much lower than that which this element can reach by controlling the minimum opening position of the throttle valve, position occupied at idle.
  • the butterfly is deprived of the conventional mechanical stop element fixing an adjustable position which it can in no case exceed in the direction of closing.
  • the regulation of the hot idling speed will then intervene by very low oscillations amplitude of the throttle position at idle, this regulation having a time constant much higher than that of the system intended to avoid stalling (the latter time constant can be much less than 1 s).
  • the starting device executes a "program" well suited to launching an engine that has been stopped for several hours and whose temperature is well stabilized.
  • the temperature sensor alone does not allow the thermal state of an engine which has been running for a certain time but which has not reached its normal operating temperature to be detected.
  • stopping the engine with the hood open for a few minutes can cool the temperature-sensitive element to the point of causing the shutter to close, even though the engine is still lukewarm: starting the engine under these conditions can lead to the flooding of the engine by excess wealth.
  • the speed of rotation of the engine on the starter, before starting the engine is used as a parameter for discriminating the enrichment program to be supplied to the engine, as a function of its thermal state.
  • the speed of rotation on a starter varies a lot depending on the thermal state of the engine: for example, a perfectly cold engine, which has not been running for several hours, will have a lower speed of rotation, generally l '' from 60 to 150 revolutions / minute, due to high viscosity of the lubricating oil or lower voltage of the electric battery, while an engine which has just started, even if it is far from its temperature normal operating speed, will have a much higher starter speed, of the order of 180 to 250 revolutions / minute.
  • This heating is interrupted at the speed at which the engine can turn on its own, typically around 350 rpm.
  • the carburetor a schematic diagram of which is given in FIG. 1, comprises a body 10 made of several assembled parts in which an intake duct 12 is formed.
  • the main fuel spouting system, opening at the neck of a venturi 14 of the duct d intake 12 is supplied with a rich primary air-fuel mixture from a constant level tank 16 and from the atmosphere.
  • Calibrators 18 and 20 are interposed on the air and fuel inlets to the system.
  • a throttle member, or butterfly, 22 is placed downstream of the venturi 14 and wedged on a rotary shaft 24 controlled by the driver by means of a linkage not shown.
  • a return spring also not shown, biases the butterfly in the closing direction.
  • Upstream of the venturi 14 is placed an air flap 26 mounted on an eccentric pin 28 so that the air flow sucked by the motor tends to bring it to the fully open position in which it is shown.
  • the carburetor also has an idling circuit supplied with a rich primary air-fuel mixture by the main spouting system.
  • This circuit opens into the intake duct 12 through an idle orifice 30 placed downstream of the throttle valve 22 and a transition or by-pass slot 32 intended to pass progressively from upstream to downstream of the throttle valve as the opening of the latter.
  • a manual adjustment screw 34 makes it possible to adjust the flow rate which passes through the orifice 30 and therefore to adjust the richness of the mixture supplied to the engine during idling operation, while the end of the butterfly is downstream of the slot 32.
  • the carburetor comprises a device intervening in particular during starting and cold starting of the engine to adjust the position of the flap 26 and that of the throttle valve 22.
  • This device comprises a temperature-sensitive element 36, which will be designated by the continued by the usual term "wax capsule".
  • This element is constituted by a closed enclosure occupied by a thermodilatable material which gives, to a rod 38 resting on it, a projection which increases with the temperature of the element. This temperature is adjustable by modulating the electric power applied to a heating resistor 40 in thermal contact with the enclosure.
  • the rod 38 is coupled to an arm 42 integral with the axis 24 by an abutment link intended to give the butterfly a minimum open position depending on the position of the rod 38 and beyond which the butterfly can be opened by the driver's action.
  • a mechanical linkage 44 also allows the wax capsule 36 to fix the position of the flap 26 as long as it is not in its fully open position, reached for a temperature of the wax capsule 36 lower than that which it takes during the operation of the engine under normal conditions.
  • a temperature sensor 46 which may consist of a resistance with a negative temperature coefficient, is associated with the wax capsule 36 so as to supply an electrical signal which is a function of the temperature of the latter.
  • the sensor 46 is connected, by a conductor 48, to one of the inputs of a calculating member 50 which may comprise, in a conventional manner, a microprocessor, a cartographic read-only memory whose role will appear below and a working RAM.
  • a calculating member 50 which may comprise, in a conventional manner, a microprocessor, a cartographic read-only memory whose role will appear below and a working RAM.
  • An analog-digital converter must in this case be provided to transform the analog signal from the sensor 46 into a digital signal.
  • Other inputs of the calculation unit 50 are respectively connected to a sensor providing a signal depending on the speed N of the engine, to a sensor assembly placed on the gearbox and the clutch and providing a binary signal A indicating whether the motor is coupled or not, and to a sensor providing a binary signal 8 indicating whether or not the throttle valve 22 is close to its minimum opening position.
  • the speed sensor can be constituted by a probe providing a pulse at each revolution of the ignition switch.
  • a first output of the calculating member 50 comprises an actuator 52 supplying the heating resistor 40 with the electrical power required to maintain it at a set temperature ⁇ c determined according to a law which will be described later.
  • a second output 54 controls the opening and closing of a solenoid valve 56 placed on the idle circuit of the carburetor, upstream of the slot 32.
  • the calculating member 50 is designed to supply, on this output, a signal to pulse width modulation, variable duty cycle, allowing the richness of the mixture supplied to the engine to be adjusted at idle.
  • the assembly consisting of the capsule 35, the arm 42 and the linkage 44 will be designed so as to give the butterfly 22 and the flap 26 an opening law as a function of the temperature of the capsule of the kind shown by the lines in solid line in Figures 2 and 3, respectively.
  • the minimum opening a of the throttle valve 22 as a function of the temperature, shown by the curve 58 corresponds to a regular decrease as a function of the temperature, from the minimum temperature at which the engine must be able to start ( -30 ° C in the example illustrated) up to the maximum temperature that the wax capsule can take 36.
  • the prior devices using a wax capsule were generally provided so that the minimum opening position of the butterfly imposed by the starting device reaches a minimum value for a determined temperature of the capsule and then stores it.
  • This minimum opening position was fixed by the abutment of the butterfly against a mechanical stop, generally adjustable.
  • the shape of the corresponding curve is represented by the dashed curve 58a.
  • the mechanical stop will generally be eliminated on a carburetor according to the invention, which makes it possible to regulate the idle speed by acting on the temperature of the wax capsule 36. With this regulation, it is possible to adopt a setpoint Nc of the idling speed of the hot engine significantly lower than on simple manual adjustment carburetors. This idling speed Nc will be maintained regardless of the load applied to the engine, for example in the event of an increase in load due to the commissioning of an accessory, for example an air conditioning unit.
  • the mixture supplied normally at idle speed can be adjusted “lean”, using the screw 34 for a nominal duty cycle of the signal applied to the solenoid valve 56, corresponding to permanent operation.
  • This duty cycle will be temporarily modified by the calculating member 50 in a direction tending to increase the richness in the event of a drop in engine speed below Nc, with a short time constant, until the member calculation, operating in closed loop, will have brought the engine back to its set idle speed by action on the temperature of the wax capsule 36.
  • This regulation, at a longer time constant is accompanied by a return to the duty cycle of instruction for the control of the solenoid valve 56.
  • Another solution consists in providing a solenoid valve 56 closed at rest, placed in parallel with a calibrator providing the quantity of mixture required for normal idling operation.
  • the law for controlling the opening of the air flap 26 could be that represented in FIG. 3 by the solid line 60, comparable to that, 60a, of a known type of carburetor with a wax capsule. It should simply be noted that the air flap arrives in its fully open position from a temperature of the wax capsule 36 much lower than the maximum temperature at which it can be brought into operation, for example at approximately 65 ° C. in the case illustrated in Figure 3.
  • the programming of the calculation unit 50 will be carried out so as to obtain a start-up strategy by action on the air shutter 26 and the butterfly 22 using as essential input parameter the temperature 0 0 of the wax capsule at l time of engine launch (i.e. at room temperature in the event of a cold start) and the number of revolutions M made by the engine since launch (this last parameter can be replaced by the time elapsed since launch time).
  • the speed regulation is carried out by all or nothing control of the heating power applied at resistance 40: if N> Nc, the heating power is applied to the wax capsule 36. If NK Nc, no heating is applied.
  • the setpoint value Nc given to the motor will be stored in the read-only memory of the calculation unit 50 in the form of a table making a value Nc correspond to each pair of value ranges of 9 0 and M (or t).
  • the part of the table immediately following the launch of the engine may for example be as follows:
  • the calculation unit gradually reduces the setpoint speed Nc from its initial value. For example, there may be a reduction in the idling speed and the setpoint each time the calculating member 50 has received 2500 pulses indicating for each an ignition.
  • the calculating member 50 regulates the temperature of the capsule 36 at a set value ⁇ c which, too, is a function of the starting temperature, with an increase in the set temperature in stages, each stage corresponding to a determined number of engine revolutions.
  • ⁇ c is a function of the starting temperature
  • the calculating member 50 causes the application of a heating "slot", for example of 5 ms, representing a determined quantity of heat, by the actuator 52 at each revolution of the engine. There is no heating if ⁇ > ⁇ c.
  • the solenoid valve 56 can also be controlled to ensure a cut in deceleration, with recovery, programmed or not, from one or more thresholds of the speed N of the engine.
  • the calculation unit 50 can also perform a deceleration cut-off, by supplying the solenoid valve 56 permanently (duty cycle of 100%) when at the same time the engine is coupled, the accelerator is not actuated and the speed N is greater than a threshold Nm.
  • the corresponding flowchart is indicated in dashes in Figure 5.
  • the calculating member can play the role of damper during the ignition cut-off, then suppressing the flow of primary mixture in the idle circuit.
  • the solenoid valve 56 is advantageously of the type open at rest so that in the event of a failure of the electrical supply to the actuator, the conductor is not hampered by major operating faults.
  • the usual drawback of such an arrangement namely the risk of self-ignition when the electrical contact is cut off, is eliminated by incorporating a time delay in the calculating member so that it keeps the solenoid valve closed for a few seconds after switching off.
  • the mechanical linkage 44 can have various constitutions, and in particular that shown in Figure 6 where the return springs are not shown, for simplicity.
  • the return springs intended in particular to push the butterfly and the flap 26 towards their closed position, may be of the type described in document FR-A-2 257 790 to which reference may be made.
  • a linkage is placed in a housing 60 fixed to the body 10 of the carburetor by means not shown, such as screws.
  • the enclosure of the wax capsule 36 is fixed to the wall of the housing 60 and its rod 38 projects inside.
  • This rod carries a pin trapped in a fork belonging to a bent lever 62 having a lower arm 64 terminated by a cam 66 forming a stop for the finger 42 (not shown) secured to the axis 24 of the butterfly 22.
  • a second arm 68 is also completed by a cam which can come into abutment with a pin 70 secured to a plate 72 fixed to the axis 28 of the shutter and forming a lever.
  • the cam has two consecutive surfaces, one, 74, designed to move the flap 26 in the opening direction by pressing on the pin 70, the other, 76, constituted by a circular edge centered on the axis 78 of the angled lever, intended to maintain the flap in its fully open position when the temperature of the capsule 36 is greater than a determined value (65 ° C. in the case illustrated in FIG. 3).
  • the starting device also includes means sensitive to the vacuum prevailing downstream of the butterfly 22 to impose on the air flap a determined opening from the first engine explosions.
  • These means consist of a membrane 80 placed in a housing 82 and subjected, on one side, to the pressure prevailing in the intake duct 12 downstream of the butterfly valve (brought by a pipe not shown) and, on the other, at atmospheric pressure.
  • the membrane 80 is connected to a rod 83 whose curved end 84 has a unidirectional connection with one of the ends of a lever 86 articulated on an axis 88 carried by the lever 62.
  • the other end of the lever 86 constitutes, for the pin 70 of the control lever 72, a stop which ensures a minimum opening of the flap 26 when a vacuum is established downstream of the butterfly valve.
  • a spring 91 acting in the opposite direction to the pressure forces exerted on the membrane 80 tends to return the rod 82 to the rest position illustrated in Figure 1 in solid lines.
  • the linkage 44 shown in Figure 6 is intended to present a hysteresis which facilitates the restarting of the hot engine during the first tens of minutes after stopping, taking into account that the thermal inertia of the engine is much greater than that of the carburetor and that, moreover, the normal temperature of the engine cooling water (80 to 100 ° C) is much higher than that of the carburetor (20 to 40 ° C).
  • the wax capsule 36 cools down quickly while the engine is hot, and therefore causes the shutter to close gradually. But this closure is useless, and even often harmful, when the engine is restarted after a few minutes or even a few tens of minutes. Indeed, the engine is hot enough not to need enrichment.
  • the linkage of Figure 6 includes means for maintaining the flap in the fully open position, upon cooling, to a temperature lower than that which corresponds to complete opening during heating.
  • this hysteresis corresponds to the curve indicated in dashes, indicating that the full opening is maintained up to approximately 35 ° C., then a fall back on the normal curve of variation of the opening as a function of the temperature.
  • the device can in this case be supplemented by means (bistable circuit whose inputs are connected to two comparators with respective thresholds of 150 revolutions / minute and 350 revolutions / minute for example) which in all cases cause heating as soon as the engine is started if the starter speed exceeds 150 rpm.
  • the invention is obviously not limited to the particular mode of execution which has been shown and described by way of example and, moreover, the calculating member can fulfill functions in addition to those which have been described or substituting for them.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Claims (8)

1. Vergaser für Brennkraftmaschine, aufweisend für den Normalbetrieb der Maschine ein Brennstoff-Hauptspritzsystem, das in die Einlassleitung (12) stromaufwärts von einem durch den Fahrer betätigten Drosselorgan (22) oder Klappenventil mündet, und - für das Anlassen und den Kaltbetrieb der Maschine - eine automatische Startvorrichtung, die eine in der Einlassleitung stromaufwärts der Durchflussöffnung des Brennstoff-Hauptspritzsystem liegende Startklappe (26) und ein temperaturempfindliches Element (36) aufweist, in dem ein in einer geschlossenen Zelle enthaltenes Material eine Volumenänderung in Abhängigkeit von der Temperatur durchläuft, die die Position der Startklappe (26) und die Position minimaler Öffnung des Klappenventils (22) steuert, dadurch gekennzeichnet, dass das temperaturempfindliche Element (36) mit einem Heizwiderstand (40) und einem Temperaturaufnehmer (46) versehen ist, wobei die Startvorrichtung ausserdem ein Rechenorgan (50) umfasst, das Eingänge, die mit dem Temperaturaufnehmer und Aufnehmern verbunden sind, die Betriebsbedingungen der Maschine darstellende Signale (A, B, N) liefern, und einen Ausgang (52) zur Steuerung auf den Heizwiderstand angewendeter elektrischer Leistung besitzt, wobei das Rechenorgan vorgesehen ist, um die auf den Heizwiderstand (40) angewendete elektrische Leistung zu kontrollieren und um dem Klappenventil (22) und der Luftklappe (26) eine Öffnung zuzuweisen, die einerseits von der Temperatur des temperaturempfindlichen Elementes zur Zeit des Anlassens der Maschine, andererseits von der durch diese letztere bewirkten Drehzahl oder der seit dem Anlassen verstrichenen Zeit abhängt.
2. Vergaser nach Anspruch 1, dadurch gekennzeichnet, dass, wobei der Vergaser einen Leerlaufkreis umfasst, versehen mit einer Primärluftzuführung, einer Brennstoffzuführung und einem Ausgang für reiches Primärgemisch in der Einlassleitung, ausgestattet mit einem Element zur manuellen Einstellung, das eingestellt ist, um der Maschine eine Leerlaufdrehzahl niedriger als diejenige zu liefern, die in Abwesenheit von Regelung erforderlich wäre, der Leerlaufkreis mit einem Magnetventil (56) versehen ist, das durch das Rechenorgan (50) ansprechend auf eine Verringerung der Drehzahl der Maschine unterhalb einer vorbestimmten Schwelle betätigt wird, um die Reichheit des der Maschine gelieferten Gemisches zu erhöhen und das Abwürgen zu vermeiden.
3. Vergaser nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass er vorgesehen ist, um eine Drehzahlregelung durch Modulation der auf das temperaturempfindliche Element angewendeten Heizleistung sicherzustellen.
4. Vergaser nach Anspruch 3, dadurch gekennzeichnet, dass das Klappventil von einem mechanischen Anschlagelement entblösst ist, wobei die Regelung der Warmleerlaufdrehzahl sich durch Schwingungen mit geringer Amplitude der Position des Klappenventils im Leerlauf auswirkt.
5. Vergaser nach Anspruch 1, dadurch gekennzeichnet, dass das Rechenorgan vorgesehen ist, um jeden Augenblick einen Einstellwert (Nc) des Leerlaufbereichs der Maschine und einen Einstellwert (θc) der Temperatur (8) destemperaturempfindlichen Elementes festzusetzen und die Temperatur zu regeln, um den Einstellwert (Nc), wenn die kalte Maschine im Leerlauf ist, und den Einstellwert (θc) in den anderen Betriebsfällen zu erhalten.
6. Vergaser nach Anspruch 5, dadurch gekennzeichnet, dass die Einstellwerte (0c) und (Nc) als Funktion der Starttemperatur (60) des empfindlichen Elementes ausgearbeitet sind.
7. Vergaser nach einem beliebigen der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Öffnungssteuerung der Klappe eine Hysterese aufweist, die das Schliessen der Klappe ausgehend von deren Position voller Öffnung verlangsamt, bis die Temperatur des empfindlichen Elementes (36) zu einem entsprechend einer Teilöffnung bestimmten Wert zurückgekehrt ist.
8. Vergaser nach einem beliebigen der vorhergehenden Ansprüche, gekennzeichnet durch zusätzliche Mittel zum Versorgen des Heizwiderstandes (40) von dem Anlassen der Maschine an, wenn die Drehzahl der Maschine eine vorbestimmte Schwelle überschreitet.
EP85401595A 1984-08-03 1985-08-05 Vergaser mit Startautomatik Expired EP0170595B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8412350A FR2568631B1 (fr) 1984-08-03 1984-08-03 Carburateur a dispositif de depart automatique
FR8412350 1984-08-03

Publications (2)

Publication Number Publication Date
EP0170595A1 EP0170595A1 (de) 1986-02-05
EP0170595B1 true EP0170595B1 (de) 1988-05-11

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US (1) US4662333A (de)
EP (1) EP0170595B1 (de)
JP (1) JPS6158960A (de)
BR (1) BR8503666A (de)
DE (1) DE3562648D1 (de)
ES (1) ES8607479A1 (de)
FR (1) FR2568631B1 (de)

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DE3028091C2 (de) * 1979-08-02 1985-09-12 Fuji Jukogyo K.K., Tokio/Tokyo Luftbrennstoffverhältnisregelsystem für einen Verbrennungsmotor
US4463723A (en) * 1982-04-01 1984-08-07 Acf Industries, Incorporated Apparatus for controllably opening a carburetor choke valve
JPS58178854A (ja) * 1982-04-14 1983-10-19 Aisan Ind Co Ltd 温度センサによるエンジン制御装置
JPS5974358A (ja) * 1982-10-20 1984-04-26 Nippon Carbureter Co Ltd 気化器の自動チヨ−ク装置
IT1157490B (it) * 1982-12-20 1987-02-11 Weber Spa Carburatore per motori a combustione interna provvisto di organi ad azione elettronica atti a mantenere costante il minimo regime del motore ed a controllare la posizione della farfalla di avviamento durante la messa in efficienza del motore
JPS59136526A (ja) * 1983-01-27 1984-08-06 Honda Motor Co Ltd スロツトル弁の完爆開度制御装置
US4498440A (en) * 1984-04-02 1985-02-12 Honda Giken Kogyo Kabushiki Kaisha Mixture control apparatus for carburetor

Also Published As

Publication number Publication date
FR2568631B1 (fr) 1987-01-16
ES545790A0 (es) 1986-06-16
FR2568631A1 (fr) 1986-02-07
DE3562648D1 (en) 1988-06-16
ES8607479A1 (es) 1986-06-16
US4662333A (en) 1987-05-05
JPS6158960A (ja) 1986-03-26
BR8503666A (pt) 1986-05-06
EP0170595A1 (de) 1986-02-05

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