EP0385103A1 - Régulateur pour moteurs à combustion interne - Google Patents

Régulateur pour moteurs à combustion interne Download PDF

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Publication number
EP0385103A1
EP0385103A1 EP19900101469 EP90101469A EP0385103A1 EP 0385103 A1 EP0385103 A1 EP 0385103A1 EP 19900101469 EP19900101469 EP 19900101469 EP 90101469 A EP90101469 A EP 90101469A EP 0385103 A1 EP0385103 A1 EP 0385103A1
Authority
EP
European Patent Office
Prior art keywords
stop
counter
tab
slide
adjusting shaft
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.)
Granted
Application number
EP19900101469
Other languages
German (de)
English (en)
Other versions
EP0385103B1 (fr
Inventor
Siegfried Dipl.-Ing. Ruthardt
Ngoc-Thach Dipl.-Ing. Nguyen
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 EP0385103A1 publication Critical patent/EP0385103A1/fr
Application granted granted Critical
Publication of EP0385103B1 publication Critical patent/EP0385103B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F02D1/08—Transmission of control impulse to pump control, e.g. with power drive or power assistance
    • F02D1/10—Transmission of control impulse to pump control, e.g. with power drive or power assistance mechanical

Definitions

  • the invention relates to a speed controller for internal combustion engines according to the preamble of claim 1.
  • Such a speed controller is already known from DE-OS 36 41 794.
  • This speed controller has a centrifugal weight adjuster which generates an actuating force corresponding to the engine speed and which acts via a control linkage on a control rod serving to control the quantity.
  • a tab is arranged, in which a slide is arranged, which is loaded by a starting spring in the direction of increasing injection quantity and cooperates with a full-load stop.
  • an adjustment of the slide for more precise adaptation of the full load quantity to the fuel requirement of the associated internal combustion engine is only possible after dismantling the bracket and, for example, by inserting spacers between the slide and bracket, and is therefore very expensive.
  • the spacers not only change the amount of fuel injected at full load, but the amount of injection is adjusted across the entire operating range of the internal combustion engine, including when it is idling, which necessitates costly corrections.
  • the speed controller according to the invention with the characterizing features of claim 1 has the advantage that a simple adjustment of the counterstop is possible without the length of the tab and thus other operating values, such as the idle amount, are also adjusted.
  • the configuration according to claim 2 achieves a space-saving design of the tab, and the further development according to claim 3 controls a temperature-dependent starting quantity.
  • the features of claim 4 achieve a fine-step actuation of the setting shaft and the further development according to claim 5 determines the rotatability of the setting shaft within predetermined limits.
  • FIG. 1 shows a simplified illustration of a speed controller
  • FIG. 2 shows a first exemplary embodiment of the tab of the speed controller as a longitudinal section
  • FIG. 3 shows the tab in top view
  • FIG. 4 shows the tab in side view, in the direction of arrow IV in FIG. 3
  • FIG 5 shows a second exemplary embodiment of the tab in plan view.
  • FIG. 1 the essential parts of an idle speed controller are shown.
  • the speed controller is attached to a fuel injection pump, of which only the housing 1, a camshaft 2 and a control rod serving as a quantity control element 3 are shown here.
  • the camshaft 2 is driven at a speed proportional to the engine speed and drives a flyweight adjuster 4.
  • the centrifugal weight adjuster 4 has two centrifugal weights 5 which move under the effect of the centrifugal forces increasing with increasing rotational speed against the forces of control springs 8 and actuate a regulating sleeve 7 via angled lever 6.
  • the regulator sleeve 7 is provided with an annular groove 10 into which, as part of a regulator rod 11, an intermediate lever 12 engages with one end 12a, which is connected at its other end 12b to a tab 13 of the regulating rod 3.
  • the control rod 3 can be displaced in the adjustment direction I indicated by a double arrow, a shift to the left resulting in an increasing injection quantity (+) and a displacement to the right resulting in a decreasing injection quantity (-).
  • a full-load stop 15 is connected to the controller housing 14 and cooperates with a counter-stop 16 which is displaceably arranged in the bracket 13 in the adjustment direction I.
  • the full load stop 15 does not have to be stationary, it can be adjusted, for example, as a function of atmospheric pressure or, if the internal combustion engine is equipped with a charger, as a function of charge air pressure.
  • the tab 13 has, at its end facing the intermediate lever 12, one of two fork-shaped projections 21 formed with supports 20 each provided with a transverse bore 19.
  • the end 12b of the intermediate lever 12 is arranged between the two carriers 20 and through one through the Cross bores 19 passing through bolts 22 connected to the tab 13.
  • the tab 13 On its side facing the control rod 3, the tab 13 is also provided with a fork-shaped extension 24 formed by two supports 23.
  • the two lugs 21 and 24 of the tab 13 are connected to one another via two brackets 25 arranged in one plane.
  • the counter-stop 16 is formed by a slide 27 which is guided in a longitudinal bore 26 of the bracket 13 and a transverse bolt 29 which is fastened therein and projects through a slot 28 from the bracket 13.
  • the slide 27 is supported on its end facing the control rod 3 on an adjusting shaft 30 inserted through the fork-shaped extension 24, against which it is pressed by a return spring 31 supported within the tab 13 during a warm start or by a starting spring 36 during a cold start.
  • a temperature-dependent working element 34 is arranged, on which a plate 35 guided in the longitudinal bore 26 is supported.
  • the start spring 36 is in turn arranged between this and the slide 27.
  • the working element 34 can be formed, for example, by an expansion device.
  • a pin 37 protrudes from the working element 34 toward the plate 35 and engages in a countersink 38 of the plate 35.
  • a guide pin 39 protrudes from the plate 35 toward the slide 27 and projects into a bore 40 in the slide 27, in which the starting spring 36 is also arranged.
  • the working element 34 has a collar 41 on which the return spring 31 engages. The working element 34 is guided axially displaceably in a sleeve 42 which is held between the brackets 25.
  • the setting shaft 30 has a positioning eccentric 30a in its area lying between the supports 23 and is closed with one the cross bores 19 of the support 23 are provided with a concentric central bore 32 through which a coupling bolt 33 is inserted for connection to the control rod 3.
  • An actuating lever 43 is coupled in a rotationally secure manner to one end of the adjusting shaft 30 and has a lever arm 44 which projects radially from the adjusting shaft 30 towards the bracket 13 and is cranked at its end.
  • the lever arm 44 is provided with a bore 45 in its end region.
  • the tab 13 has an elevation 46 with a flat surface 47 in the area in which the actuating lever 43 covers it.
  • the lever arm 44 can be snapped in with a nose 49 protruding from its end facing the tongue 13.
  • the actuating lever 43 is provided with a stop lug 50 on both sides of the lever arm 44 in its area near the adjusting shaft 30.
  • the length of the working element 34 is so small that the plate 35 does not abut the slide 27, but is pressed against the working element 34 by the starting spring 36. If the cross bolt 29 of the counter-stop 16 now comes to rest against the full-load stop 15, the slide 27 is pushed against the force of the starting spring 36 in the direction of increasing injection quantity until it rests on the plate 35. With increasing temperature, the length of the working element 34 increases until it comes into contact with the slide 27 via the plate 35. The start spring 36 is now deactivated. A further expansion of the working element 34 is possible towards the sleeve 42, by compressing the return spring 31, in which the working element 34 is axially displaceable.
  • a tool for rotating the actuating lever 43 can be inserted through an opening in the controller housing 14 and engages in the bore 45 of the lever arm 44.
  • the setting shaft 30 can be adjusted in several stages by the actuating lever 43, the number of stages being determined by the number of longitudinal grooves 48.
  • the possible adjustment of the control path of the control rod 3 can be, for example, 0.1 mm twice in the direction of increasing and in the direction of decreasing injection quantity.
  • the adjusting shaft 30 is rotated such that, due to the adjusting eccentric 30 ⁇ of the adjusting shaft 30, the slide 27 together with the working element 34 against the force of the return spring 31 during a warm start or the starting spring 36 is pressed into the tab 13 during a cold start.
  • the setting shaft 30 is rotated so that the effective radius of the adjusting eccentric 30 ⁇ becomes smaller, as a result of which the slide 27 is pressed closer to the setting shaft 30 again by the force of the return spring 31 or starting spring 36.

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  • 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)
EP90101469A 1989-02-28 1990-01-25 Régulateur pour moteurs à combustion interne Expired - Lifetime EP0385103B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3906142 1989-02-28
DE3906142A DE3906142A1 (de) 1989-02-28 1989-02-28 Drehzahlregler fuer brennkraftmaschinen

Publications (2)

Publication Number Publication Date
EP0385103A1 true EP0385103A1 (fr) 1990-09-05
EP0385103B1 EP0385103B1 (fr) 1993-11-03

Family

ID=6375061

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90101469A Expired - Lifetime EP0385103B1 (fr) 1989-02-28 1990-01-25 Régulateur pour moteurs à combustion interne

Country Status (3)

Country Link
EP (1) EP0385103B1 (fr)
JP (1) JPH02259246A (fr)
DE (2) DE3906142A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3641794A1 (de) * 1985-12-06 1987-06-11 Bosch Gmbh Robert Fliehkraftdrehzahlregler fuer brennkraftmaschinen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3641794A1 (de) * 1985-12-06 1987-06-11 Bosch Gmbh Robert Fliehkraftdrehzahlregler fuer brennkraftmaschinen

Also Published As

Publication number Publication date
DE59003275D1 (de) 1993-12-09
EP0385103B1 (fr) 1993-11-03
JPH02259246A (ja) 1990-10-22
DE3906142A1 (de) 1990-08-30

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