EP0029928B1 - Regeleinrichtung für die Leerlauf-Drehzahl von Brennkraftmaschinen, insbesondere fremdgezündeten Einspritz-Brennkraftmaschinen - Google Patents

Regeleinrichtung für die Leerlauf-Drehzahl von Brennkraftmaschinen, insbesondere fremdgezündeten Einspritz-Brennkraftmaschinen Download PDF

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Publication number
EP0029928B1
EP0029928B1 EP80106786A EP80106786A EP0029928B1 EP 0029928 B1 EP0029928 B1 EP 0029928B1 EP 80106786 A EP80106786 A EP 80106786A EP 80106786 A EP80106786 A EP 80106786A EP 0029928 B1 EP0029928 B1 EP 0029928B1
Authority
EP
European Patent Office
Prior art keywords
stop
regulating device
adjusting drive
bore
engine
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
EP80106786A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0029928A1 (de
Inventor
Athanasios Ing. Grad. Michassouridis
Gregor Ing. Grad Fischer
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0029928A1 publication Critical patent/EP0029928A1/de
Application granted granted Critical
Publication of EP0029928B1 publication Critical patent/EP0029928B1/de
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
    • F02M3/00—Idling devices for carburettors
    • F02M3/06—Increasing idling speed
    • F02M3/062—Increasing idling speed by altering as a function of motor r.p.m. the throttle valve stop or the fuel conduit cross-section by means of pneumatic or hydraulic means

Definitions

  • the invention relates to a control device of the type described in the preamble of claim 1.
  • the invention has for its object to improve the control device according to the preamble of claim 1 so that even in such operating conditions no excessive speed increase occurs.
  • the invention solves this problem by the characterizing features of claim 1.
  • a bypass valve 1 is shown as a control device with its connections to a manifold 2 with oscillating tubes 3 and to the intake manifold 4 with the throttle valve 5.
  • the bypass valve 1 is located in a bypass line 6, which is seen in the suction flow direction, is connected in front of the throttle valve 5 and opens into the manifold 2 behind it.
  • the bypass valve 1 comprises a diaphragm box 7, the chamber 8 of which can be acted upon by the intake manifold pressure via a line 9, and a housing 10.
  • the housing 10 has a bore 11 and, perpendicularly thereto, a further bore 12.
  • a circular insert 13 is fitted into the bore 11 adjacent to the bore 12.
  • the insert 13 is designed similar to an aperture and has an opening 14 as a control cross section, the width of which increases progressively starting from the upper edge region of the insert 13 parallel to the bore 12.
  • the bore 12 is designed as a gradually narrowing blind hole. With its widest section 15 it crosses the bore 11. The wide section 15 is followed by a threaded section 16 which merges into a short smooth-walled section 17. The short smooth-walled section 17 merges with the formation of a shoulder 18 into the narrowest section 19 of the blind hole, which is crossed by a transverse bore 20.
  • connecting pieces 22 are connected to openings 21 formed by the transverse bore 20, via which the narrowest section 19 is included in the coolant circuit of the machine.
  • the housing 23 of an expansion element 24 projects into the narrowest section 19 of the stepped bore 12 and is supported on the shoulder 18 with the interposition of a sealing ring 25.
  • the expansion element 24 is held by means of a retaining ring 26 which is provided with an external thread and which is screwed into the threaded section 16.
  • a lifting pin 27 of the expansion element 24 projects through the retaining ring 26 and forms a stop for an actuating rod 28 of a cylindrical valve body 29 which is guided in the widest section 15 of the bore 12.
  • the actuating rod 28 projects through a Seal 30 out of the housing 10 into the membrane box 7, in which it is attached to the membrane 31.
  • a compression spring 32 is arranged, which counteracts the effect of the intake manifold pressure.
  • the identifier of the compression spring 32 is matched to the idling behavior of the machine with regard to all possible load cases in such a way that a relatively flat identifier results in the area of the lower loads when idling and a relatively steep identifier with a continuous transition in the area of the higher loads.
  • the compression spring 32 is adjustable in the chamber 8 of the membrane box 7 with the interposition of a spring plate 33 by means of a setting screw 34 in its pretension.
  • An idle adjustment screw 35 arranged concentrically in the adjusting screw 34 enables the setting of a minimum opening in cooperation with an idle stop bolt 36 with a second spring plate 37, which is connected to the actuating rod 28 and thus to the valve body 29.
  • bypass valve 1 The basic mode of operation of the bypass valve 1 is described in DE-A-26 55 171.
  • the function of the bypass valve 1 is based not only on the change in the intake manifold pressure due to changes in the speed of the machine, but also in the changes in the intake manifold pressure while the speed remains the same but the load is changed and the cross-section of the opening 14 changes are of decisive influence.
  • it can also be determined by a coordinated dimensioning of the opening 14 a value of the idle speed which is adapted to the respective requirements and which is variable via the values of the intake manifold pressure.
  • an idling speed which is about 100 rpm lower than unloaded idling can be provided, which considerably reduces the tendency of such motor vehicles to creep. Since the idle speed when the machine is under load can be lower than when it is unloaded due to the higher filling, both conditions of such motor vehicles are fully met.
  • the expansion element 24 is increasingly heated by the coolant when the machine is warmed up.
  • the lifting pin 27 serving as a stop is pushed forward more and more, and thus prevents, in the warm operating state of the machine, that an excessively large opening cross section of the bypass valve 1 is released.
  • the speed increase which can occur due to a sudden drop in the idle load on the warm machine, is kept within narrow limits because only the narrower upper part of the opening 14 is available for regulation. As a result, the impression of a malfunction of the control device is reliably avoided.
  • Special coolant lines to and from the housing 10 can be saved either by mounting the housing 10 on the machine (not shown) in such a way that the expansion element 24 projects into a space in the machine through which the coolant flows, or by heating a component having the operating temperature by heat transfer.
  • the bypass valve 101 shown in FIG. 3 as a control device has essentially the same structure as the bypass valve described above. It comprises a diaphragm box 107 as a servomotor with a chamber 108 which can be acted upon by the intake manifold pressure and a housing 110.
  • the housing 110 has a bore 111 and, perpendicularly thereto, a further bore 112.
  • a guide bushing 113 is inserted into the bore 112.
  • the bore 111 is continued on one side up into the guide bush 113 and on the other side an opening 114 is formed in the wall of the guide bush 113 as a control cross section, so that the guide bush 113 is a kind of aperture for forms the bypass.
  • a cylindrical valve body 129 is arranged on an actuating rod 128 within the guide bushing 113.
  • the upper end of the actuating rod 128 is fastened to the diaphragm 131 of the diaphragm box 107 acted upon by the spring 132. In the way of working there is between the by-described first pass valve 1 and the bypass valve 101 described here no difference.
  • An actuator 124 is screwed into the housing 110 coaxially with the bore 112.
  • the actuator 124 consists of an expansion element similar to that in FIG. 1 and a commercially available PTC resistor for heating it.
  • the lifting pin 127 of the expansion element protrudes at one end of the actuator 124 in the direction of the valve body 129 and forms a stop for its stroke limitation.
  • a contact tongue 136 is arranged for connecting an electrical line, not shown.
  • the actuator 124 can be controlled via a time-dependent switching element, not shown. It is also possible to control it by logically linking several links.
  • the resistance of the PTC resistor increases with increasing temperature and thus ensures a temperature limitation.
  • the actuator 124 can also consist of a lifting magnet, not shown, which, like the expansion element, is arranged coaxially with the bore 112 and the core of which fulfills the function of the lifting pin 127.
  • an actuator for the stroke limitation is to arrange a lifting magnet as an actuator laterally on the lower part of the housing 110.
  • a core or an extension of the core of the lifting magnet can be moved into the movement path of the valve body 129 or an extension of its actuating rod.
  • only relatively small holding forces are required which hold the core of the lifting magnet forming the stop in its position limiting the movement path of the valve body 129.
  • the actuation of the actuator takes place essentially in the same way as the actuation of the actuator 124.
  • an actuator 224 in the form of a vacuum actuator or a further diaphragm box is arranged for the stop between the actual bypass valve 201 and its diaphragm box 207 serving as a servomotor, which acts as a movable stop for limiting the stroke of the valve body 229 and to set the maximum opening cross section 214 carries a stop sleeve 227.
  • the stop sleeve 227 directly limits the path of movement of the diaphragm 231 when the actuator 224 is activated in a corresponding manner.
  • Actuator 224 is controlled via a time-dependent solenoid-pneumatic valve and / or a temperature-dependent pneumatic valve in a vacuum line leading to actuator 224.
  • further refinements of the control are possible, as described above in connection with the previous exemplary embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
EP80106786A 1979-12-01 1980-11-04 Regeleinrichtung für die Leerlauf-Drehzahl von Brennkraftmaschinen, insbesondere fremdgezündeten Einspritz-Brennkraftmaschinen Expired EP0029928B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2948501A DE2948501C2 (de) 1979-12-01 1979-12-01 Regeleinrichtung für die Leerlauf-Drehzahl von Brennkraftmaschinen, insbesondere fremdgezündeten Einspritz-Brennkraftmaschinen
DE2948501 1979-12-01

Publications (2)

Publication Number Publication Date
EP0029928A1 EP0029928A1 (de) 1981-06-10
EP0029928B1 true EP0029928B1 (de) 1984-05-16

Family

ID=6087421

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80106786A Expired EP0029928B1 (de) 1979-12-01 1980-11-04 Regeleinrichtung für die Leerlauf-Drehzahl von Brennkraftmaschinen, insbesondere fremdgezündeten Einspritz-Brennkraftmaschinen

Country Status (4)

Country Link
EP (1) EP0029928B1 (enrdf_load_stackoverflow)
JP (1) JPS56501618A (enrdf_load_stackoverflow)
DE (2) DE2948501C2 (enrdf_load_stackoverflow)
WO (1) WO1981001591A1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4494502A (en) * 1982-01-27 1985-01-22 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Idling controller of variable displacement engine
DE3222363A1 (de) * 1982-06-15 1983-12-15 Robert Bosch Gmbh, 7000 Stuttgart Anordnung zur drehzahlregelung einer brennkraftmaschine
DE3238190C2 (de) * 1982-10-15 1996-02-22 Bosch Gmbh Robert Elektronisches System zum Steuern bzw. Regeln von Betriebskenngrößen einer Brennkraftmaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1594991A (enrdf_load_stackoverflow) * 1968-01-03 1970-06-08
DE2734145C2 (de) * 1975-06-26 1982-09-23 Société Industrielle de Brevets et d'Etudes S.I.B.E. S.A, 92200 Neuilly-sur-Seine Steuergerät an Vergasern für Brennkraftmaschinen
DE2655171C3 (de) * 1976-12-06 1980-03-20 Bayerische Motoren Werke Ag, 8000 Muenchen Regeleinrichtung für die Leerlaufdrehzahl von Brennkraftmaschinen, insbesondere fremdgezündeten Einspritz-Brennkraftm aschinen
US4102315A (en) * 1977-01-14 1978-07-25 The Bendix Corporation Proportional controller for controlling air flow to an engine
DE2855098C2 (de) * 1978-01-20 1982-04-08 Nippondenso Co., Ltd., Kariya, Aichi Regelsystem für eine Brennkraftmaschine

Also Published As

Publication number Publication date
JPS56501618A (enrdf_load_stackoverflow) 1981-11-05
DE2948501C2 (de) 1981-12-10
EP0029928A1 (de) 1981-06-10
DE3067885D1 (en) 1984-06-20
WO1981001591A1 (en) 1981-06-11
DE2948501B1 (de) 1981-04-23

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