EP0209681B1 - Drehzahlregler für Kraftstoffeinspritzpumpen - Google Patents

Drehzahlregler für Kraftstoffeinspritzpumpen Download PDF

Info

Publication number
EP0209681B1
EP0209681B1 EP86107316A EP86107316A EP0209681B1 EP 0209681 B1 EP0209681 B1 EP 0209681B1 EP 86107316 A EP86107316 A EP 86107316A EP 86107316 A EP86107316 A EP 86107316A EP 0209681 B1 EP0209681 B1 EP 0209681B1
Authority
EP
European Patent Office
Prior art keywords
governor
lever
shaft
fuel injection
spring arrangement
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
EP86107316A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0209681A1 (de
Inventor
Franz Eheim
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0209681A1 publication Critical patent/EP0209681A1/de
Application granted granted Critical
Publication of EP0209681B1 publication Critical patent/EP0209681B1/de
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
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/04—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by mechanical means dependent on engine speed, e.g. using centrifugal governors

Definitions

  • the invention is based on a speed controller according to the preamble of the main claim.
  • a fuel injection pump has a control rod for adjusting the delivery rate, which is coupled to a centrifugal force adjuster via a two-armed lever.
  • One side of the adjusting sleeve of the centrifugal force adjuster is acted upon by a control spring, the pretension of which can be adjusted by a lever.
  • an additional spring acts on the control rod, the other end of which is attached to the end of a swivel arm which can be rotated about a point fixed to the housing with the aid of an adjusting lever.
  • This additional spring can be adjusted in terms of its direction of action with the help of the swivel arm, with it acting in the basic setting in support of the control spring.
  • the force component acting in the direction of the control rod can be changed, which results in a change in the overall characteristics of the control spring and additional spring.
  • This device is used to change the slew rate of the speed controller, but at the same time there is also a change in the load setting.
  • the setup is very complex.
  • a speed controller according to the preamble of claim 1 is known from FR-A 1 188 261.
  • the control spring arrangement, its connection to the control lever and the support arm are arranged outside the pump housing.
  • the tension of the regulating spring is changed on the one hand by changing the length between its fastening points, and on the other hand the position of the regulating spring changed to the shaft or their direction of force to the control lever.
  • the suspension point of the control spring can be set and fixed by adjusting an adjusting screw which is screwed on through the support arm.
  • An equally designed controller is known from DE-C 864 781.
  • the setting can advantageously be carried out with the housing of the fuel injection pump closed and during operation of the fuel injection pump.
  • only a single control spring is required to set the control characteristic and, due to the angular position of the control spring axis and the preload of the control spring, both the regulating steepness or the P-degree and the regulating speed can be easily set at a single point on the fuel injection pump will.
  • the device is therefore less complex and space-saving and can be used in particular in distributor injection pumps, which are characterized by a particularly small size.
  • a fuel injection pump that is equipped with such a controller is advantageously suitable for use in internal combustion engines with which, for example when generating electricity, exact speeds must be maintained with a precisely defined control behavior (P-degree).
  • the setting is made according to claim 1 for both the angular position and for the bias by adjusting movements that can be made during the operation of the fuel injection pump regardless of the adjustment of the support arm.
  • a further development of the object according to claim 1 is advantageously given by claim 2, whereby the bias of the spring can be changed in a particularly simple manner and with a large adjustment range.
  • FIG. 1 shows a partial section through a distributor fuel injection pump of known design with the essential parts of the speed controller
  • FIG. 2 shows a section through the longitudinal axis of the shaft of the swivel arm in the example according to FIG. 1
  • FIG. 3 shows a partial section through a distributor fuel injection pump for an exemplary embodiment
  • FIG. 4 shows a longitudinal section 3
  • FIG. 5 shows an embodiment as a partial section through the shaft of the swivel arm
  • FIG. 6 shows an embodiment with a section through the shaft of the swivel arm in a modification of the embodiment according to FIGS. 4 to 5
  • FIG. 7 shows a view of the swivel arm of the embodiment of Figure 6.
  • FIG. 1 shows part of a distributor fuel injection pump of a known type with a pump piston 1, which is set into a reciprocating and at the same time rotating movement by means not shown, and is guided in a bushing 3 inserted in the housing 2 of the fuel injection pump.
  • the housing includes a pump suction chamber 4 which is filled with fuel which is generally kept at a pressure which is controlled as a function of the speed in order to carry out control functions.
  • a ring slide 6 is arranged as a quantity adjusting member, which controls the mouth of a relief line 7 leading from the pump work chamber (not shown here) into the pump suction chamber.
  • the ring slide is displaceable on the pump piston, the fuel injection quantity delivered per pump stroke under high pressure being greater in the embodiment shown, the further the ring slide is displaced to the top dead center of the pump piston.
  • a speed controller which has a control lever 9 which can be pivoted about an adjustable housing 10 which is substantially fixed to the housing and is coupled via a head 11 at one end to the ring slide 6 and adjusts it.
  • This regulator lever can in principle be provided as the only regulator lever, but in the example shown a regulator lever arrangement with several levers is provided.
  • the control lever 9 is a start lever which is acted upon directly by an adjusting sleeve 13 of a centrifugal speed sensor 8, which is only indicated.
  • the start lever 9 Under the influence of the speed-dependent actuating forces of the adjusting sleeve 13, the start lever 9 can be brought into contact with the rocker arm 14. Between the start lever and the rocker arm, a leaf spring is arranged as a start spring 17, which is compressed during this process.
  • an idle control spring 18 designed as a compression spring is articulated, which is supported on an adjustable stop 19 fixed to the housing. This stop has a screw 20 screwed through the wall of the housing 2, which screw can be adjusted and fixed from the outside.
  • the axis 10 common to the start lever and rocker arm is mounted on an adjusting lever 23 which, in a manner not shown here, e.g. is pivotable against spring force around a fixed point of the housing for adjusting the axis.
  • the setting is also carried out by a screw 66 screwed through the housing wall, which engages at the end of the adjusting lever.
  • the control spring arrangement 15 consists of a helical spring 21 loaded under tension, one end of which is hooked into an eyelet 22 on the rocker arm 14 and the other end of which is hooked onto a pin 24. As can be seen in FIG. 2, this is located at the end of a support or swivel arm 25 which is mounted on a shaft 26. This penetrates the housing 2 within an eccentric bushing 28 and has an adjusting lever 29 at the outwardly projecting end. The shaft 26 is tightly guided in the eccentric bushing and sits eccentrically to the axis of the bushing, which in turn is guided through the housing and has an adjusting lever 30 at the outer end.
  • the controller shown here is an all-speed controller, in which the speed is set by adjusting the bias of the control spring 21, when it is exceeded, the rocker arm 14 is deflected together with the start lever 9 and the ring slide 6 is displaced downward.
  • the controller can also work with just one lever, which the centrifugal speed sensor and the control springs then engage. In this position of the ring slide, a lower fuel injection quantity is injected, which in turn reduces the previously reached speed. The actuating force on the adjusting sleeve 13 is then correspondingly lower, so that the rocker arm 14 again comes into a pivoting position which corresponds to a higher fuel injection quantity. Depending on the size of the preload, this control process occurs at lower or higher speeds.
  • the bias is set by the position of the shaft 26, which is adjustable by means of the eccentric bushing 28.
  • the regulating speed can also be changed, that is to say the steepness of the fuel injection quantity characteristic curve between full-load operation and idling.
  • the angular position of the axis of the helical control spring 21 relative to the rocker arm 14 can be changed, which is brought about by turning the adjusting lever 29.
  • individual positions of the pivot position of the pivot arm 25 are shown. If one then forms in each case the extension of the axis of the coil spring 21, it can be seen that with increasing deflection the effective lever arm with respect to the axis 10 decreases in connection with the passage of the prestress of the coil spring 21 on the regulating process.
  • the effective spring characteristic which is expressed in the steepness of the regulating process when the set speed is reached, can be varied.
  • a desired regulating steepness (P degree) can be set very precisely.
  • the axis of the helical spring 21 advantageously lies in the swivel plane which describes the eyelet 22 when the rocker arm 14 is deflected.
  • FIG. 3 shows an embodiment variant of the embodiment according to FIG. 1 and, except for the configuration of the swivel arm and its actuation, corresponds to the embodiment according to FIG. 1. Reference is therefore made to the description of this figure with regard to these parts.
  • a pivot arm 35 is provided in FIG. 3, which can be pivoted about a shaft 36 which is fixed to the housing, as can be seen in FIG.
  • the swivel arm 35 is made in two parts in the present case and consists of a support arm 37 and a slidable part 38 on which the pin 24 is fastened at the extreme end, in which the end of the coil spring 21 is suspended.
  • the displaceable part has the shape of a sheet metal strip and has a first slot 39 and a second slot 40. These elongated holes are penetrated by a rivet 41 and 42, respectively, via which the displaceable part 38 is coupled to the support arm 37.
  • the displaceable part 38 At the axis of the shaft 36, to which the support arm 37 is fixedly connected, the displaceable part 38 has a recess 44 with a shoulder 45 pointing in the direction of displacement along the support arm 37.
  • the shaft 36 has a stepped bore 46, 47, in the part of the larger diameter 46 adjoining the suction chamber, an actuating pin 49 is coaxially guided and has a surface 50 in the form of a wedge on its end that projects into the pump suction chamber 4 , which protrudes into the recess 44 and works there with the shoulder 45.
  • the part 38 is displaced more or less far along the support arm 37 and thus the coil spring 21 is more or less pretensioned.
  • a pin 52 is guided through the stepped bore part 47, which is smaller in diameter, which presses on the end face of the actuating pin 49 and is screwed into a thread 53 in the shaft 36 from the outside.
  • the screw-in position is fixed with the aid of a lock nut 54, which is screwed onto the end of the pin 52.
  • the adjusting pin 49 is thus also adjusted.
  • the characteristic of the helical spring 21 can be influenced by adjusting the swivel position of the swivel arm 35.
  • the pretension is varied in a simple manner via the pin 52 and the adjusting pin 52, regardless of the pivot position.
  • This type of intervention can also be used to set a desired preload in the finest steps.
  • a very precisely adjustable controller is obtained which is suitable for the operation of unit engines.
  • FIG. 6 shows a further embodiment variant, in which, as in the exemplary embodiment according to FIGS. 3 and 4, the swivel arm 35 'is mounted on a shaft 36 designed in the same way as in FIG.
  • the swivel arm 35 ' consists of a support arm 37 and a part 38' which can be moved thereon and which has a first elongated hole 39 and a second elongated hole 40.
  • the displaceable part 38 is connected to the support arm 37 via rivets 41 and 42 which extend through the elongated holes 39 and 40.
  • the displaceable part 38 ' has a laterally open recess 44', into which a pin 57 now engages, which is mounted eccentrically on the end face of an actuator 59.
  • the actuator 59 consists of a bolt which is mounted tightly in an axial bore 60 in the shaft 36.
  • a threaded bore 61 adjoins the bore 60 to the outside, through which the threaded part 62 of the bolt 59 is screwed.
  • the threaded part 62 has a form-fitting surface 63, via which the bolt 59 can be rotated.
  • a lock nut 64 is screwed onto the threaded part 62.
  • the shaft 36 can be rotated via the adjusting lever 29, whereby the swivel position of the helical spring 21 can be adjusted.
  • the displacement position of the displaceable part 38' is determined.
  • the advantage here is that the displaceable part 38 'can be moved back and forth independently of the restoring force of the spring 21 via the recess which is adapted to the width of the pin diameter of the pin 57. If a washer 66 is also placed on the end face of the bolt, on which the pin 57 is then seated, the adjustment range of the displaceable part can be increased compared to the embodiment according to FIG.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
  • Fuel-Injection Apparatus (AREA)
EP86107316A 1985-06-22 1986-05-30 Drehzahlregler für Kraftstoffeinspritzpumpen Expired EP0209681B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853522434 DE3522434A1 (de) 1985-06-22 1985-06-22 Drehzahlregler fuer kraftstoffeinspritzpumpen
DE3522434 1985-06-22

Publications (2)

Publication Number Publication Date
EP0209681A1 EP0209681A1 (de) 1987-01-28
EP0209681B1 true EP0209681B1 (de) 1989-09-20

Family

ID=6273954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86107316A Expired EP0209681B1 (de) 1985-06-22 1986-05-30 Drehzahlregler für Kraftstoffeinspritzpumpen

Country Status (3)

Country Link
EP (1) EP0209681B1 (ja)
JP (1) JP2672296B2 (ja)
DE (2) DE3522434A1 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3744275A1 (de) * 1987-12-24 1989-07-13 Kloeckner Humboldt Deutz Ag Mechanischer drehzahlregler fuer eine brennkraftmaschine mit einstellbarem ungleichfoermigkeitsgrad
DE3829798A1 (de) * 1988-09-02 1990-03-08 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
JPH02221646A (ja) * 1989-02-21 1990-09-04 Yanmar Diesel Engine Co Ltd エンジンのガバナ装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE864781C (de) * 1948-05-15 1953-01-29 Porsche Konstruktionen G M B H Fliehkraftregler fuer Brennkraftmaschinen, insbesondere fuer Kraftfahrzeuge
FR1188261A (fr) * 1957-12-12 1959-09-21 Régulateur universel toutes vitesses à billes, particulièrement pour pompes à injection
DE1120849B (de) * 1960-05-12 1961-12-28 Ammann A G U Schwingmuehle
DE2342107A1 (de) * 1973-08-21 1975-02-27 Bosch Gmbh Robert Drehzahlregler fuer kraftstoffeinspritzpumpen
JPS544583Y2 (ja) * 1975-06-13 1979-02-27
DE3004035A1 (de) * 1980-02-05 1981-08-13 Robert Bosch Gmbh, 7000 Stuttgart Regeleinrichtung fuer eine kraftstoffeinspritzpumpe
DE3141518A1 (de) * 1981-10-20 1983-04-28 Robert Bosch Gmbh, 7000 Stuttgart "einrichtung zum regeln des luft-kraftstoff-verhaeltnisses des in die brennraeume einer selbstzuendenden brennkraftmaschine einzubringenden betriebsgemischs"
JPS59184331U (ja) * 1983-05-26 1984-12-07 株式会社ボッシュオートモーティブ　システム 燃料噴射ポンプのコントロ−ルレバ−シヤフト

Also Published As

Publication number Publication date
EP0209681A1 (de) 1987-01-28
JPS61294142A (ja) 1986-12-24
JP2672296B2 (ja) 1997-11-05
DE3522434A1 (de) 1987-01-02
DE3665752D1 (en) 1989-10-26

Similar Documents

Publication Publication Date Title
EP0209681B1 (de) Drehzahlregler für Kraftstoffeinspritzpumpen
DE2336194A1 (de) Regler fuer eine kraftstoffeinspritzpumpe
DE3405540C2 (ja)
DE4129837C2 (de) Drehzahlregler für Kraftstoffeinspritzpumpen von Brennkraftmaschinen
EP0208898B1 (de) Drehzahlregler für Kraftstoffeinspritzpumpen
DE3203583A1 (de) Kraftstoffeinspritzpumpe fuer brennkraftmaschinen mit spritzzeitpunktverstellung
EP0320617A2 (de) Drehzahlregler für Kraftstoffeinspritzpumpen
DE3246992C2 (ja)
DE3732493C1 (en) Centrifugal speed governor for injection pumps of internal combustion engines
DE814812C (de) Drehzahlregler, insbesondere fuer Einspritzpumpen
EP0766782B1 (de) Kraftstoffeinspritzpumpe für brennkraftmaschinen
EP0624720B1 (de) Kraftstoffeinspritzpumpe für Brennkraftmaschinen
DE3126002A1 (de) Kraftstoffeinspritzvorrichtung
DE3703628A1 (de) Fliehkraftdrehzahlregler fuer einspritzpumpen
DE1011223B (de) Fliehkraftdrehzahlregler fuer Einspritzbrennkraftmaschinen
DE2811912A1 (de) Kraftstoffeinspritzanlage
EP0425801B1 (de) Fliehkraftdrehzahlregler für Einspritzbrennkraftmaschinen
DE958704C (de) Drehzahlregler fuer Einspritzbrennkraftmaschinen
AT201350B (de) Fliehkraftdrehzahlregler für Einspritzbrennkraftmaschinen
DE3005904A1 (de) Kraftstoffpumpe
DE1476004C3 (de) Kraftstoffeinspritzvorrichtung für selbstzündende Brennkraftmaschinen
DE3418174A1 (de) Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE3242876A1 (de) Regler fuer die mengenregelung von einspritzpumpen einer einspritzbrennkraftmaschine
DE4221750A1 (de) Kraftstoffeinspritzpumpe für Brennkraftmaschinen
DE4332847A1 (de) Kraftstoffeinspritzpumpe für Brennkraftmaschinen

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

Kind code of ref document: A1

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19870604

17Q First examination report despatched

Effective date: 19880215

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3665752

Country of ref document: DE

Date of ref document: 19891026

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

Ref country code: GB

Effective date: 19900530

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
GBPC Gb: european patent ceased through non-payment of renewal fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19960723

Year of fee payment: 11

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

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980203

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

Ref country code: FR

Payment date: 20050519

Year of fee payment: 20