EP0132504B1 - Dispositif pour commander la vitesse de ralenti d'un moteur à combustion interne - Google Patents
Dispositif pour commander la vitesse de ralenti d'un moteur à combustion interne Download PDFInfo
- Publication number
- EP0132504B1 EP0132504B1 EP84103889A EP84103889A EP0132504B1 EP 0132504 B1 EP0132504 B1 EP 0132504B1 EP 84103889 A EP84103889 A EP 84103889A EP 84103889 A EP84103889 A EP 84103889A EP 0132504 B1 EP0132504 B1 EP 0132504B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- push rod
- coils
- core
- force
- valve element
- 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
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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
- F02M3/00—Idling devices for carburettors
- F02M3/06—Increasing idling speed
- F02M3/07—Increasing idling speed by positioning the throttle flap stop, or by changing the fuel flow cross-sectional area, by electrical, electromechanical or electropneumatic means, according to engine speed
- F02M3/075—Increasing idling speed by positioning the throttle flap stop, or by changing the fuel flow cross-sectional area, by electrical, electromechanical or electropneumatic means, according to engine speed the valve altering the fuel conduit cross-section being a slidable valve
Definitions
- the invention relates to a device for regulating the idling speed of an internal combustion engine according to the preamble of claim 1.
- Devices are used to regulate the idle speed in order to set the lowest possible speed, in particular in motor vehicles, which results in favorable consumption and emission values. If the filling of the internal combustion engine remains the same, fluctuations in the idling speed can occur in particular as a result of different loads which are caused by auxiliary units. In addition, at low idle speed, the operating state of an internal combustion engine is close to the unstable speed range in which the engine may die if there is an additional load. Therefore, the air flow or the filling is not fixed at idle, but regulated according to the fluctuations in the idle speed.
- an actuating current is applied to a solenoid, which is formed, inter alia, as a function of the actual speed and which causes the valve element connected to the solenoid to be adjusted such that the actual speed reaches a predetermined target speed largely independently of disturbance variables.
- a solenoid which is formed, inter alia, as a function of the actual speed and which causes the valve element connected to the solenoid to be adjusted such that the actual speed reaches a predetermined target speed largely independently of disturbance variables.
- a device for regulating the idling speed of an internal combustion engine which has an electromechanical actuator with a coil and a push rod which acts on a valve element.
- a prestressed decoupling spring is arranged between the push rod and the valve element, while a return spring acts on the push rod and a counter spring counteracts the return spring on the valve element.
- a solenoid valve which has two coils, both of which act on a common core, the two coils each being assigned a return sleeve and both return sleeves being separated by an air gap.
- a solenoid valve with a plurality of coils, each of which is assigned a core, with all the cores being arranged on a common push rod, is known from GB-A-928 997.
- the push rod between the cores is made of non-magnetic material.
- the present invention is therefore based on the object of designing a device of the type mentioned at the outset such that the device ensures an average air throughput in idle mode when the actuating current fails or solenoids with mechanically inexpensive means, and in largely trouble-free operation a largely linear course of the force / stroke characteristic and enables relatively large actuating forces and avoids mechanical hysteresis on the valve element.
- the invention is based on the principle that two magnetic fluxes are generated by two coils through which actuating currents flow, which generate forces acting in opposite directions on a force-guiding element, the push rod, by at least one core attached to the latter.
- the fluxes generated by the two coils are guided through the ferromagnetic parts including the core or cores in such a way that they influence one another as little as possible. Due to the partial magnet systems acting against each other on the push rod in this way, non-linearities due to changes in the air gap or non-linear magnetization characteristics are largely canceled out. Therefore, the coils and the ferromagnetic parts carrying the magnetic flux can be dimensioned such that saturation does not occur in any area of the ferromagnetic parts.
- One of the two springs a so-called counter spring, is connected to the valve element without interposing the push rod, while the second of the two springs, a so-called adjusting spring, acts on the push rod to adjust the mean air flow rate in the event of a fault.
- the thrust rod and the valve element can be set in motion by the excitation of the coils in order to avoid a mechanical hysteresis which falsifies the setting of the valve element.
- a convenient embodiment of the one direction is specified in claim 2. It is characterized by a common yoke sleeve for both decoupled magnetic circuits.
- the magnetic flux in a circle is generated by one of the two coils.
- the two magnetic circuits are decoupled by the low permeability gap between the two cores provided on the push rod.
- the embodiment mentioned is particularly expedient since the adjustment of the bearings in the one-piece yoke sleeve is made possible without further assembly and adjustment effort.
- the push rod is to be made in the section between the two cores from material of the lowest possible permeability, so that the two magnetic circuits are decoupled.
- a material has to be selected or additional measures have to be taken to keep the wear of the push rod in the bearing points small.
- the push rod can be made less expensive if it carries a common core according to the particularly preferred embodiment according to claim 4. A separate inference is provided for each coil, which - with the exception of one end face through which the core can pass - is largely closed.
- the magnetic decoupling takes place through an air gap between the two yoke sleeves.
- the push rod can be mounted in an outer end face of the two yoke sleeves.
- the device can be made particularly compact in that one of the springs provided is accommodated in an outer end face of the yoke sleeves.
- a common cylindrical yoke sleeve is designated 1. It has outer end faces 2, 3 which terminate in conical pole shoes 4 and 5 on the inside. Please refer to the drawing to identify the more precise shape of the cone-shaped pole tube.
- the yoke sleeve is thickened in the middle in the form of a flange.
- the flange has a cylindrical recess 7.
- the entire cylindrical yoke sleeve is symmetrical about a central cross-sectional plane 8.
- the yoke sleeve is made of ferromagnetic material.
- a push rod 9 extending through the interior of the yoke sleeve is supported in bearings 10 and 11.
- the push rod is made of non-magnetic material at least in the region of the recess 7.
- the push rod is displaceable in the bearings 10 and 11 in the axial direction and is shown in a central position in FIG.
- Each core has a frustoconical first end facing the conical pole shoe 4 or 5 and extends into the recess 7 with a second end.
- Each coil can be supplied with a control current by a control circuit arrangement, also not shown.
- the actuating currents can have the form of clocked rectangular pulses, the clock ratios of which can be set independently of one another. The displacement of the push rod then corresponds to the ratio of the mean values of these pulses.
- the duty cycle of the pulses and their phase position are freely adjustable, since there is no mutual interference in the magnetic circuits of the two coils.
- a valve element is connected to a coupling point 16.
- a counter spring 17 tries to press the valve element against a decoupling spring 18 which is connected in series with the push rod.
- an adjusting spring 19 engages, with which the central position of the push rod in the case of de-energized coils and thus the position of the average air throughput of the valve element can be adjusted.
- the connecting rod assumes the same middle position if the actuating currents in both coils have the same mean values.
- the pulse of the actuating currents stimulates the push rod to vibrate, which promotes a mechanical hysteresis-free adjustment of the push rod.
- This vibration is decoupled from the valve element in a particularly suitable manner by the decoupling spring 18.
- the embodiment according to FIG. 2 has two cylindrical yoke sleeves 6 and 20 arranged in alignment with one another, each of which has a cone-shaped pole shoe 21 and 22 on the inside on one end face.
- a common core 23 is mounted, which - also in its central section - consists of ferromagnetic material. Both yoke sleeves are facing away from their end faces 24, 25. Sides with a flange each reaching to the core 26 and 27 shaped.
- the magnetic flux paths are decoupled in the region of a central cross-sectional plane 28 by the flanges.
- the adjusting spring 29 is arranged in a space-saving manner in the outer end face 25.
- a decoupling spring 30 in the outer end face 24.
- the push rod 31 connects the decoupling spring to the valve element 35, to which a counter spring 32 engages.
- the mode of operation of this device drawn in the middle position is essentially the same as that of the device according to FIG. 1.
- the two magnetic circuits 33 and 34 are advantageously decoupled outside the yoke sleeves in the area of the middle cross-sectional plane.
- the magnetic fluxes are in turn generated by a coil (not shown) in a space 36 or 37 which is practically completely enclosed by ferromagnetic parts of the yoke sleeve which carry the magnetic flux.
- the construction of the embodiment according to FIG. 2 can be kept particularly compact due to the extensive decoupling of the magnetic circuits in the area of the central cross-sectional plane.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetically Actuated Valves (AREA)
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3325538A DE3325538A1 (de) | 1983-07-15 | 1983-07-15 | Einrichtung zur regelung der leerlaufdrehzahl eines verbrennungskraftstoffmotors |
DE3325538 | 1983-07-15 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0132504A2 EP0132504A2 (fr) | 1985-02-13 |
EP0132504A3 EP0132504A3 (en) | 1985-04-03 |
EP0132504B1 true EP0132504B1 (fr) | 1986-09-10 |
Family
ID=6204040
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84103889A Expired EP0132504B1 (fr) | 1983-07-15 | 1984-04-07 | Dispositif pour commander la vitesse de ralenti d'un moteur à combustion interne |
Country Status (3)
Country | Link |
---|---|
US (1) | US4756286A (fr) |
EP (1) | EP0132504B1 (fr) |
DE (2) | DE3325538A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3716661A1 (de) * | 1987-05-19 | 1988-12-08 | Bosch Gmbh Robert | Vorrichtung zur steuerung mindestens eines drosselquerschnittes an mindestens einer steueroeffnung |
US5233530A (en) * | 1988-11-28 | 1993-08-03 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Engine controlling system which reduces the engine output upon detection of an abnormal condition |
DE4033190C1 (fr) * | 1990-10-19 | 1992-01-02 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | |
DE4231239A1 (de) * | 1992-09-18 | 1994-03-24 | Bosch Gmbh Robert | Vorrichtung zur Regelung der Leerlaufdrehzahl einer Brennkraftmaschine |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB636649A (fr) * | ||||
GB228685A (en) * | 1924-01-01 | 1925-02-12 | Charles Edwin Foster | Improved automatic control valve |
US2168927A (en) * | 1937-10-22 | 1939-08-08 | Warner Bros | Prime mover regulation |
GB928997A (en) * | 1961-02-06 | 1963-06-19 | Kromschroeder Ag G | Electromagnetically operated fluid control valves |
US3190608A (en) * | 1962-02-07 | 1965-06-22 | Kromschroeder Ag G | Electromagnetically controlled valve |
US3424426A (en) * | 1965-07-19 | 1969-01-28 | Robert J Neff | Electrically-operated valve |
CH432163A (de) * | 1965-12-01 | 1967-03-15 | Netstal Ag Maschf Giesserei | Tellerventil |
US3688495A (en) * | 1970-04-17 | 1972-09-05 | Adolf Fehler | Control system for metering the fuel flow in gas turbine engines |
US4097833A (en) * | 1976-02-09 | 1978-06-27 | Ledex, Inc. | Electromagnetic actuator |
JPS538431A (en) * | 1976-07-12 | 1978-01-25 | Hitachi Ltd | Air-to-fuel ratio control means for engine |
US4144514A (en) * | 1976-11-03 | 1979-03-13 | General Electric Company | Linear motion, electromagnetic force motor |
JPS585081Y2 (ja) * | 1977-05-06 | 1983-01-28 | トヨタ自動車株式会社 | 始動性向上エバポエミッション対策装置 |
JPS56118529A (en) * | 1980-02-22 | 1981-09-17 | Nippon Denso Co Ltd | Rotational speed controlling method for engine |
JPS56127115A (en) * | 1980-03-08 | 1981-10-05 | Ckd Controls Ltd | Gas flow rate control system |
US4361309A (en) * | 1980-06-23 | 1982-11-30 | Niipondenso Co., Ltd. | Electromagnetic actuator |
CA1180639A (fr) * | 1980-11-12 | 1985-01-08 | Robert W. Brundage | Dispositif a pression de fluide commande magnetique |
JPS5829754U (ja) * | 1981-08-21 | 1983-02-26 | 日立金属株式会社 | ドアロツク用アクチユエ−タ |
-
1983
- 1983-07-15 DE DE3325538A patent/DE3325538A1/de not_active Withdrawn
-
1984
- 1984-04-07 EP EP84103889A patent/EP0132504B1/fr not_active Expired
- 1984-04-07 DE DE8484103889T patent/DE3460666D1/de not_active Expired
-
1985
- 1985-11-14 US US06/799,182 patent/US4756286A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US4756286A (en) | 1988-07-12 |
DE3460666D1 (en) | 1986-10-16 |
DE3325538A1 (de) | 1985-01-24 |
EP0132504A2 (fr) | 1985-02-13 |
EP0132504A3 (en) | 1985-04-03 |
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