EP0256254B1 - Control device for varying the start of the injection and/or the fuel delivery in a fuel injection pump - Google Patents

Control device for varying the start of the injection and/or the fuel delivery in a fuel injection pump Download PDF

Info

Publication number
EP0256254B1
EP0256254B1 EP87109014A EP87109014A EP0256254B1 EP 0256254 B1 EP0256254 B1 EP 0256254B1 EP 87109014 A EP87109014 A EP 87109014A EP 87109014 A EP87109014 A EP 87109014A EP 0256254 B1 EP0256254 B1 EP 0256254B1
Authority
EP
European Patent Office
Prior art keywords
housing
spring
injection pump
energy store
emitter
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
EP87109014A
Other languages
German (de)
French (fr)
Other versions
EP0256254A1 (en
Inventor
Hubert Thudt
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.)
MAN Truck and Bus SE
Original Assignee
MAN Nutzfahrzeuge 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 MAN Nutzfahrzeuge AG filed Critical MAN Nutzfahrzeuge AG
Priority to AT87109014T priority Critical patent/ATE39162T1/en
Publication of EP0256254A1 publication Critical patent/EP0256254A1/en
Application granted granted Critical
Publication of EP0256254B1 publication Critical patent/EP0256254B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D1/00Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/08Transmission of control impulse to pump control, e.g. with power drive or power assistance

Definitions

  • the invention relates to a control device for adjusting the injection timing and / or the delivery rate of a fuel injection pump for internal combustion engines with features of the type specified in the preamble of claims 1 and 2.
  • a control device of the type mentioned is known from EP 00 69 111 B1.
  • the spring energy store provided there serves the following purpose:
  • a return spring connected to a hydraulic control device is provided as a safety device, with which the control rod can be quickly returned to the zero filling position from any set position if required.
  • the known control device proves to be too expensive in every respect, not only in terms of component and space requirements, not only with regard to the last-mentioned safety device, but also the entire mechanical actuating step transmission device.
  • reference signals and control signals are required to master the switching commands which the stepper motor has to carry out for a corresponding adjustment of the control rod.
  • the reference signals which can be supplied to the microprocessor as a command variable, are usually generated by known devices, e.g. Speed sensors, which are arranged on the crankshaft or a camshaft of the internal combustion engine, are supplied.
  • Speed sensors which are arranged on the crankshaft or a camshaft of the internal combustion engine
  • a control device similar to that mentioned at the beginning is already known from DE-OS 2417 771.
  • a stepper motor, motion transmission elements between this and the control rod, a return spring, a stepper and a speed sensor are provided, all of which are arranged within a closed housing which is flanged to the injection pump.
  • the components in question are also precisely matched to the type of injection pump to which they are assigned.
  • the rotor of the stepper motor there can practically only carry out a relatively small rotational movement of a maximum of 90 ° with its drive shaft, because of the movement transmission device disclosed there, in order to adjust the control rod along its entire stroke. This only allows a relatively rough setting.
  • the encapsulation of the components in said housing is disadvantageous in that the components enclosed therein, e.g. in the event of a defect, they cannot be removed from the housing without extensive and cumbersome disassembly and can be replaced by other components. Because the parts of the assembly are exactly adapted to one injection pump type, this assembly is practically impossible for other injection pumps and types.
  • the arrangement of the individual components of the control device according to the invention results in a very compact overall arrangement, which can be fastened to the injection pump either completely or largely pre-assembled.
  • different parts can therefore already be attached to the injection pump, there to its shaft or the control rod, which injection pump parts are prepared as appropriate for this attachment.
  • the components can be adapted to different types of injection pumps with minimal effort.
  • the existing one can be removed from the housing and another can be flanged to the latter.
  • a different encoder is required, the existing one is removed from the housing and replaced by another.
  • control device also allows retrofitting of centrifugal governor-operated injection pumps to electronically-mechanically controlled injection pumps at any time, and because of the abovementioned possibilities there is universal adaptability to the characteristics of the respective injection pump.
  • the control device according to the invention also proves to be very advantageous from a logistics perspective, particularly in the storage and service area, because a number of different components are combined in a single control block.
  • the control device described in detail below serves to adjust the injection timing and / or the delivery rate of a fuel injection pump for internal combustion engines.
  • the fuel injection pump is shown with its housing only in the connection area for the control device according to the invention and is designated by (1).
  • the delivery elements that are not put through are adjusted directly or indirectly via a control rod (2).
  • Control commands issued by a microprocessor (not shown), which is usually combined with the electronic motor controller, can be transmitted to this control rod (2) by an electric stepper motor (3) via a plurality of movement transmission elements with an intermediate spring force accumulator (4).
  • the spring force accumulator (4) can temporarily take up one or more steps of the electric stepper motor (3), which is particularly the case when an actuating step is triggered by the microprocessor, which coincides with a delivery process of the fuel injection pump and thereby the adjustment of the control rod (2 ) counteracts an increased force. After this relatively short-term control rod blockage has been removed, the adjustment steps which are force-absorbed by the spring force accumulator (4) are passed on to the control rod (2) under its relaxation, so that it can assume its correct setting position, even if it is offset somewhat in time from the control pulse.
  • control rod (2) is assigned a return spring (5) which serves and is dimensioned in terms of force with respect to the parts of the control device connected to the control rod (2) in such a way that the control rod (2) is in any setting position in the zero filling position is traceable.
  • a special gear-reduction gear (6) is provided as the movement motor-side movement transmission element, which is switched on between the stepping motor (3) and the spring force accumulator (4).
  • a force transmission rod (7) is used as the control rod-side movement transmission element, which establishes the connection between the spring force accumulator (4) and the control rod (2).
  • the control device generally further comprises a mechanical speed sensor (8) which detects the speed of the injection pump shaft (9) and delivers corresponding signals to the microprocessor.
  • a mechanical speed sensor (8) which detects the speed of the injection pump shaft (9) and delivers corresponding signals to the microprocessor.
  • an electromechanical step transmitter (10) is provided, which can be driven from the step motor (3), detects the steps it has carried out, and returns corresponding signals to the microprocessor.
  • the supporting element for at least a large part of the above-mentioned components of the control device according to the invention is a base plate (11) which can be attached to the outside of the fuel injection pump (1).
  • control device The details of the control device according to the invention are discussed below.
  • the spring force accumulator (4) consists of two mutually movable, one between them Prestressed compression spring (12) receiving spring plates (13, 14), the maximum distance from each other is limited by stops (15, 16) in a housing (17) spanning them.
  • the housing (17) is hollow cylindrical; in the area of one end the stop (15) is formed by a stop ring (19) which is countered to the outside by a locking ring (18).
  • the other stop (16) is realized by a different end collar (20) formed in the housing (17).
  • This spring force accumulator (4) designed in this way is penetrated lengthwise at least beyond its two spring plates (13, 14) by the force transmission rod (7) when it is mounted, and is then received between two stops (21, 22) arranged on the latter .
  • these stops (21, 22), which hold the two spring plates (13, 14) of the spring force accumulator (4) between them, are two circlips inserted in ring grooves of the force transmission rod (7) .
  • the right stop (22) in the drawing is by a larger diameter collar on the power transmission rod (7) and only the right stop (22) in the drawing by a larger diameter collar on the power transmission rod (7) and only the stop (21) shown on the left in the drawing is formed by a locking ring which can be inserted into an annular groove (21/1) of the force transmission rod (7).
  • a correspondingly straight toothing (23) is arranged on the housing (17) of the spring force accumulator (4) axially parallel to the formation of a toothed rack.
  • the gear reduction gear (6) which is coupled to the stepper motor (3) on the force introduction side, is connected to this linear toothing (23).
  • This gear reduction gear (6) which is of the same design in all of the exemplary embodiments and can be seen in its details from FIG. 4, is accommodated in a common housing (24), just like the spring force accumulator (4).
  • This housing (24) is fixedly arranged on the base plate (11) and is correctly fixed there with a centering collar (24/1) immersed in a through hole (11/1).
  • the stepper motor (3) is arranged on one side and the stepper (10) on the other side.
  • the stepper motor (3) is flanged with its housing (25) on the outside to the one side wall (26) of the housing (24), indirectly fixed there and releasably fastened by means of screws (27).
  • a cylindrical recess (28) is formed in the side wall (26) of the housing (24), into which a centering collar (29) which projects beyond the connection surface on the stepper motor housing (25) is formed.
  • a receiving space (30) for the reduction gear (6) and a receiving bore (31) for the spring force accumulator (4) In the housing (24) there is a receiving space (30) for the reduction gear (6) and a receiving bore (31) for the spring force accumulator (4).
  • the receiving space (30) is open to the pacemaker (10) when it is mounted on the housing (24), but is covered by the bottom (32) of its housing (33).
  • the step encoder (10) is flanged to the outside of the other side wall (34) of the housing (24), which is parallel to the side wall (26), is indirectly fixed there and is detachably fastened by means of screws (35).
  • a protruding centering collar (36) is provided on the latter on the side wall (34), which projects into a correspondingly adapted centering recess (37) in the base (32) of the pacemaker - engages housing (33).
  • a transverse pin (38) is also provided, which penetrates mutually aligned receiving bores in the housing side wall (34) and in the bottom (32) of the pacemaker housing (33).
  • the motor shaft of the stepping motor (3) is coupled in the exemplary embodiment shown via a tongue and groove connection (40) to the input shaft (41) of the gear reduction gear (6).
  • the input shaft (41) overlaps the motor shaft (39) with its one hollow cylindrical end and is mounted in this area in a bore (42) in the side wall (26) of the housing (24).
  • a sealing ring (43) prevents leakage oil from passing to the stepper motor (3).
  • the input shaft (41) passes completely through the gearbox receiving space (30) for the gear reduction gearbox (6) in the direction parallel to the axis, extends into the stepper housing (25) and is in the bottom (32) thereof by means of a ball bearing (44 ) stored.
  • the input shaft (41) on this side of the ball bearing (44), i.e. within the receiving space (30) carries a first gear (45) of the gear reduction gear (6) and on the other side of the ball bearing (44), i.e. within the encoder housing (33) generates a pulse Rotor (46) as part of the pace
  • the gear reduction gear (6) consists, in addition to the gear (45), of a second gear (47) and a third gear (48).
  • the two gear wheels (47, 48) are spaced apart from one another on the output shaft (49) of the gear reduction gear (6).
  • the latter is in the region of its one end in the side wall (26) of the housing (24) in a ball bearing (50) used there and in the region of its other end in the bottom (32) of the pacemaker housing (33) in a ball bearing (51 ) stored.
  • the output shaft (49) is arranged axially parallel to the input shaft (41).
  • the second gear (47) meshes with the first gear (45) and is larger in diameter.
  • the third gear (48) of the gear reduction gear (6) is in engagement with the linear toothing (23) arranged on the outside along the housing (17) of the spring force accumulator (4).
  • the transmission ratio of the gear reduction gear (6) is determined by the diameter or the number of teeth of the three gear wheels (45, 47, 48).
  • the first gear (45) has ten teeth
  • the second gear (47) twenty-five teeth
  • the third gear (48) teeth is determined by the diameter or the number of teeth of the three gear wheels (45, 47, 48).
  • the spring force accumulator (4) is axially displaceable in the receiving bore (31) in a plane perpendicular to the shafts (41, 49) of the gear reduction gear (6) when the third gear (48) rotates, between two settings.
  • One of these two settings corresponds to the maximum filling order for the control rod (2) and is limited by a stop, not shown, on or in the fuel injection pump (1).
  • the second end position which corresponds to the zero filling position, is limited in the receiving bore (31) by a stop arranged there, which is formed by a locking ring (52) inserted into an annular groove.
  • the receiving bore (31) for the spring force accumulator (4) is secured against leakage of leakage oil by a locking plug (54), which is countered by a further locking ring (53) and is surrounded by a sealing ring that can enter it from the fuel injection pump (1).
  • the receiving bore (31) receiving the spring force accumulator (4) completely penetrates the housing (24) and cuts the receiving space (30) of the same in order to create a passage for the third gear (48) of the gear reduction gear (6).
  • the speed sensor (8) is also arranged on the base plate (11) in the manner described in more detail below.
  • the base plate (11) carries at least the housing (55) of the speed sensor, this housing (55) being fixed, welded, molded or screwed onto the base plate (11).
  • (56) denotes the housing cover of the speed sensor (8), which is held on the housing (55) by means of screws (57).
  • These screws (57) also serve to fasten the base plate (11) to the fuel injection pump (1), penetrate the housing (55) of the speed sensor (8) and holes in the base plate (11) completely in the axial direction and engage in the mounting position on the fuel injection pump (1) in the threaded holes there. Screws (58) are also provided for further fastening the base plate (11) to the fuel injection pump (1).
  • the signal-generating organs of the pacemaker (10) and the speed sensor (8) are basically made of the same components. These signal-generating organs are pulse-generating rotors, the rotor (46) of the pacemaker (10) being mentioned earlier and the pulse-generating rotor of the speed sensor (8) being designated (59).
  • Each of these pulse-generating rotors (46 and 59) consists of a hub (60) on (46) or (61) on (59) on the respective shaft (41 or 9) that provides the drive , round disk (62) on (60) or (63) on (61), on the respective periphery of which project axially and extend along a coaxial circular path at uniform intervals, equally designed pulse generating elements (64) on (62) or ( 65) are arranged on (63).
  • the individual pulse generating elements have a tubular segment segment shape.
  • Two magnetic fork barriers (66, 67) are assigned to the pulse generating elements (65) of the speed sensor (8), while only one magnetic fork barrier (68) is assigned to the pulse generating elements (64) of the step generator (10).
  • the magnetic fork barriers (66, 67) of the speed sensor (8) are each arranged on a circuit board (69) or (70) on the inside of the housing cover (56) of the speed sensor - Housing (33) are each fastened by two screws (71) and (72).
  • Each of these boards (69, 70) is connected to a pulse pick-up cable (not shown) which leads to the microprocessor and which is led through an opening (73) and (74) in the housing cover (56).
  • the magnetic fork barrier (68) of the pacemaker (10) is also arranged on a circuit board (75) which is fastened to the inside of a housing cover (76) of the pacemaker housing (33) by means of screws (77).
  • the housing cover (76) is fixed in position in the pacemaker housing (33) by a centering collar (78) and by several screws (35) mentioned earlier, which are also used to fix the pacemaker housing (33) to the housing (24). serve, set.
  • the circuit board (75) is also connected to the latter via a pulse pick-up cable (not shown), which is passed through an opening (79) in the housing cover (76) and is connected to the other side of the microprocessor.
  • the magnetic fork barriers (66, 67) and (68) each extend on both sides of the circular path, which the pulse generating elements (64, 65) of the speed sensor (8) or the step sensor (10) when the respective disk (62) or ( 63) describe and each form a magnetic field, so that when one of the pulse generating elements (64) or (65) passes through, a Hall pulse representative of the angle of rotation or step of rotation can be generated.
  • the shaft to which the pulse generating rotor (46) of the pacemaker (10) is connected is the input shaft (41) of the gear reduction gear (6) which is extended into the housing (33) of the latter.
  • the hub (60) is held at a distance with respect to the ball bearing (44) at the outer free end of the input shaft (41) via spacers (80, 81) and a conical disk spring (82) and is screwed onto a threaded pin (83) Nut (84) fastened with a washer (85).
  • the step encoder (10) can be completely preassembled as such and on the housing (24).
  • the pulse-generating rotor (59) of the speed sensor (8) is attached directly to the free end of the injection pump shaft (9) which is extended out of the fuel injection pump (1).
  • a receiving cone (86) is provided at the free end of the injection pump shaft (9) and a correspondingly adapted receiving cone bore (87) is provided in the hub (61) of the rotor (59).
  • a tongue and groove connection (88) ensures that the hub (61) is secured against rotation with respect to the injection pump shaft (9).
  • the pulse-generating rotor (59) is fastened to the injection pump shaft (9) by a nut (90) screwed onto a threaded pin (89) arranged at its free end with the interposition of a washer (91).
  • a through hole (92) is provided in the base plate (11) so that the pulse-generating rotor (59) already attached to the end of the injection pump shaft (9) can dip into the speed sensor housing (55) when the base plate (11) is attached to the fuel injection pump whose diameter is larger than the outer diameter of the disc (63) of the rotor (59).
  • Said through bore (92) also serves as a centering bore for fixing the position of the base plate (11) on the fuel injection pump (1), a corresponding projecting centering collar (93) being arranged on the outside thereof.
  • the through hole (92) and the centering collar (93) are also used in all other exemplary embodiments.
  • an arrangement for the pulse-generating rotor (59) of the speed sensor (8) is selected, which completely pre-assembles the same together with the other parts of the speed sensor (8) in its housing (55). enables.
  • the pulse-generating rotor (59) with its hub (61) is loosely rotatably mounted on a bearing journal (94) which rests on the cover plate (95) of the speed sensor housing (55), on which the housing cover (56) also lies on the outside. is attached.
  • a blind hole (96) with a positive-locking cross-section is provided at the free end of the latter, and a drive pin (97) is provided on the pulse-generating rotor (59) in continuation of the hub (61), the outer free end (98 ) is adapted to the form-fitting cross section of the blind hole (96).
  • a compression spring (99) is also arranged on the drive pin (97).
  • the speed sensor (8) is completely pre-assembled.
  • an auxiliary element e.g. insert a cover cap into the receiving bore (92) which prevents the rotor from falling out and which is removed beforehand when the control device is finally mounted on the fuel injection pump.
  • the compression spring (99) is supported on one end on a shoulder (101) of the hub (61) and on the other end on the outer end face (102) of the injection pump shaft ( 9) and then ensures that the pulse-generating rotor (59) remains pressed against the support plate (100) on the bearing journal (94) with slight pressure during operation of the speed sensor.
  • further position fixing means are provided which, when the base plate (11) is attached, ensure that it is correctly positioned with respect to the fuel injection pump (1). and ensure their parts.
  • These further position-fixing means are arranged at a location remote from that of the aforementioned and are of a similar design. This can be seen from Figure 4; it is a further centering hole (103) in the base plate (11) into which a centering pin (104) on the fuel injection pump (1) engages.
  • FIGS. 2, 6, 7 and 9 show a first embodiment for the connection of the spring force accumulator (4) via the force transmission rod (7) to the control rod (2).
  • This is a connection variant in connection with a control rod (2) with an L-shaped cross-section, which has a certain dimension over the outer contour the fuel injection pump (1) is extended and receives both the power transmission rod (7) and the return pressure spring (5) in the area of its outer free end.
  • the relevant assembly sequence is shown in Figure 9.
  • the return pressure spring (5) is first plugged onto the outer free end of the control rod (2) in the zero filling position, then preloaded and held in the tensioned state by means of an abutment. This abutment, as can be seen in detail in FIG.
  • the connecting block (105) consists of a connecting block (105) and a pressure plate (106) rigidly attached to it, the outside diameter of which is slightly smaller than the receiving bore (31) for the spring force accumulator (4).
  • the connecting block (105) has two contact edges at right angles to each other, with which it comes to rest against the legs of the L-shaped control rod (2). Attaches the connecting block (105) to the control rod (2) by means of a screw (107), which is countered with its screw head (108) on the outside of the vertical leg of the control rod (2), with a screw hole (109) in a cross hole ( 110) penetrates in the control rod (2) and engages in an aligned threaded hole (111) in the connecting block (105) and presses it into the installed position on the inside of the vertical leg of the control rod (2).
  • the screw (107) is secured against loosening by means of a locking plate (112), namely by means of a bent-up tab (113) which bears against an outer surface of the screw head (108).
  • the return pressure spring (5) is fixed in a prestressed form between a contact surface (114) on the fuel injection pump (1) and the pressure plate (106).
  • the force transmission rod (7) is fastened to the control rod (2), specifically by means of a connecting piece (115) arranged at its end, which is cross-sectionally adapted to the L-shape of the control rod (2).
  • the power transmission rod (7) is fastened by means of a screw (116), which with its bearing shaft (117) penetrates a continuous bearing bore (118) in the vertical leg of the control rod (2) and with its end face on the Supported on the outside of the connecting piece (115) and screwed with its threaded shaft (119) into a threaded bore (120) running through there and with its screw head (121) holds the control rod (2) in the mounting position with a certain amount of axial play.
  • the screw (116) is also secured against loosening by a tab (122) of the locking plate (112) which bears against the outside of one of the surfaces provided on the screw head (121).
  • the return pressure spring (5), its abutment (105, 106) and the force transmission rod (2) therefore form a subassembly to be mounted on the outer free end of the control rod (2).
  • the remaining parts of the control device are further to be preassembled in or on the housing (24) and on the base plate (11), in the case of the speed sensor (8) either as shown in FIG. 5 or as shown in FIG. 8.
  • the power transmission rod (7) preassembled on the control rod (2) plunges into the receiving bore (31) and then completely penetrates the spring force accumulator (4) along its length.
  • the spring force accumulator (4) is finally fixed to the force transmission rod (7), bringing it into contact with its pressure plate (14) at the stop (22) and then the outer stop in the form of the locking ring (21) is inserted into its receiving groove (21/1). Finally, the receiving bore (31) is closed by the sealing plug (54) and its position is determined by the locking ring (53) to be inserted.
  • FIGS. 10, 11 and 12 An alternative to the embodiment described above is shown in FIGS. 10, 11 and 12, a special coupling between control rod (2) and power transmission rod (7) being used, which enables alternative preassembly methods.
  • On the power transmission rod (7) there is also a spacing apart from the other stop (22) closer to the fuel injection pump, a pressure plate (123) forming an abutment for the return pressure spring (5) and in front of it the one part of a plug-in coupling.
  • the other part of this plug-in coupling is arranged at the free end of the control rod (2).
  • One part of the plug-in coupling is formed by a plug-in sleeve (124) which, in the exemplary embodiment shown, is arranged after the pressure plate (123) at the outer end of the force transmission rod (7).
  • This plug-in sleeve (124) has a sleeve circumferential wall which is divided into longitudinal lamellae (126) and made elastic by longitudinal slots (see FIG. 12).
  • the individual lamellae (126) are each provided with gripping jaws (127) which are thickened inwards.
  • the other part of the plug-in coupling which in the present case is arranged at the outer free end of the control rod (2) which is designed accordingly or provided with a correspondingly designed and fastened extension piece, is formed by a plug-in head (128).
  • This plug head (128) has a socket widening cone (138 / 1,138 / 2) formed by a chamfer on the front and rear and is arranged on a clamping neck (129) which is coaxial with a flat end face (130) of a cylindrical section (131) the control rod (2) closes.
  • the plug-in head (128) is assigned a securing sleeve (132) which can be displaced axially on the cylindrical section (131) of the control rod (2) against the force of a pressure spring (134) acting on the rear and supported on a counter surface (133) and on the cylindrical one Section (131) is secured against falling out by a locking pin (135).
  • the latter penetrates the cylindrical section (131) transversely and projects into at least one longitudinal groove (136) of the securing sleeve (132).
  • the securing sleeve (132) covers the clamping neck (129) and at least half of the plug head (128) in the axial direction.
  • the outside diameter of the plug head (128) is slightly smaller than the inside diameter of the plug sleeve (124).
  • the wall thickness of the circumferential sleeve wall divided into individual lamellae (126) and the thickened gripping jaws (127) is adapted to the cross-sectional area between the end face (130), clamping neck (129), plug-in head (128) and through hole (137) of the securing sleeve (132) so that practically no or only a slight axial play is possible in the coupled state.
  • the plug coupling described above allows two possible pre-assembly methods, one of which is shown in Figure 10 and the other in Figure 11.
  • the return pressure spring (5) is first pushed onto the cylindrical section (131) on the control rod (2) that is already equipped with the compression spring (134) and the securing sleeve (132).
  • the force transmission rod (7) is then attached to the plug head (128) with its plug sleeve (124) on the front.
  • the plug sleeve (124) When axially pushed onto the plug head (120), the plug sleeve (124) is first widened by the sleeve expanding cone (138/1), so that when the plug sleeve (124) is expanded further axially, the securing sleeve (132) is axially counter to the force of the Compression spring (134) is displaced and at the same time the return compression spring (5) is tensioned with the control rod (2) held in the zero filling position. This axial displacement occurs until the end of the push-in sleeve (124) abuts the end face (130) of the cylindrical section (130) and the gripping jaws (127) snap into the area of the clamping neck (129).
  • the plug-in sleeve (124) returns to its cylindrical state on the outside, so that the locking sleeve (132) is pushed back into its locking position by the force of the relaxing compression spring (134), in which the plug-in sleeve (124) then widens all around overlapped, effectively prevented and at the same time the return pressure spring (5) is then clamped between the pressure plate (123) and the contact surface (114) on the fuel injection pump (1).
  • the compression spring (5) and this specially designed power transmission rod (7) thus form a preassembled subassembly of the control device.
  • the remaining components of the control device are preassembled in or on the housing (24) and on the base plate (11) and, together with the latter, form a subassembly which can also be preassembled.
  • this pre-assembly can also be carried out in this case as shown in FIG. 5 or as shown in FIG.
  • the power transmission rod (7) preassembled on the control rod (2) first dips into the receiving bore (31) of the housing (24) and then also penetrates the one already installed there Spring force accumulator (4) completely along its length.
  • the spring force accumulator (4) if not yet done, is brought into contact with the stop (22) of the force transmission rod (7) and then by inserting the locking ring (21) the associated groove (21/1) is operatively connected to the power transmission rod (7).
  • the receiving bore (31) is still closed by the sealing plug (54) and the latter is held in the closed position by the locking ring (53) to be inserted.
  • the control device according to the invention can be preassembled overall, ie all of its parts are installed in or on the housing (24) or on the base plate (11).
  • the speed sensor (8) as shown in Figure 8, would be completely pre-assembled and its pulse-generating rotor (59) against falling out of the speed sensor housing (55) by a corresponding cover cap inserted into the through hole (92) of the base plate to back up.
  • the force transmission rod (7) is already connected to the spring force accumulator (4).
  • the receiving bore (31) of the housing (24) is already closed at one end by the plug (54), which is held in the closed position by the locking ring (53).
  • the sealing plug (54) forms the stop for the zero filling position of the power transmission rod (7) and thus also the control rod (2).
  • the return pressure spring (5) is inserted into the receiving bore (31) of the housing (24) following the pressure plate (123) in a relaxed form. So that it remains in the pre-assembled position, the receiving bore (131) is closed at the end by a cap (139) which can be removed later.
  • the cylindrical section (131) of the control rod (2) in the zero-filling position which is already equipped with the compression spring (134) and the securing sleeve (132), is immersed in the interior of the receiving bore (31) and then comes with the plug head (128) in plug contact with the plug sleeve (124).
  • the push-in sleeve (124) is then widened at the beginning by the sleeve expansion cone (138/1), then the locking sleeve (132) is axially displaced and the return pressure spring (5) is tensioned at the same time.
  • the gripping jaws (127) can snap into the area of the clamping neck. Then the securing sleeve (132) advances back into its securing position, releasing the compression spring (134), in which an unwanted release of the coupling connection is then no longer possible.
  • the base plate (11) also lies completely against the fuel injection pump (1) and can then be finally attached to it.
  • a very compact control device is thus generally created, the parts of which can all be preassembled in one assembly or in two or three sub-assemblies. But even in the event that the pre-assembly is divided into two or three sub-assemblies, particularly easy handling with quick assembly is guaranteed in any case.
  • the latter means that the final assembly of the control device on the fuel injection pump can be carried out in a few simple steps and with the parts to be coupled being automatically assigned in the correct position.
  • all individual parts of the control device e.g. In the event of a defect, it can be replaced individually at any time with little effort.

Description

Die Erfindung betrifft eine Steuereinrichtung für die Verstellung des Einspritzzeitpunktes und/oder der Fördermenge einer Kraftstoffeinspritzpumpe für Brennkraftmaschinen mit Merkmalen der im Oberbegriff der Ansprüche 1 und 2 angegebenen Art.The invention relates to a control device for adjusting the injection timing and / or the delivery rate of a fuel injection pump for internal combustion engines with features of the type specified in the preamble of claims 1 and 2.

Eine Steuereinrichtung der eingangs genannten Art ist aus der EP 00 69 111 B1 bekannt. Der dort vorgesehene Federkraftspeicher dient dabei folgendem Zweck:A control device of the type mentioned is known from EP 00 69 111 B1. The spring energy store provided there serves the following purpose:

Wenn vom Mikroprozessor ein Stellschritt ausgelöst wird, der zeitlich mit einem Fördervorgang der Einspritzpumpe zusammenfällt, dann ist die Verstellung der Regelstange zunächst blockiert, jedoch nimmt der Kraftspeicher einen oder mehrere Schritte des elektrischen Stellmotors quasi als Puffer vorübergehend auf und gibt diese zwischengespeicherten Schritte bei Aufhebung der Blockierung der Regelstange an diese weiter, so dass dann alle vom Schrittmotor vorgegebenen Stellschritte in eine entsprechende Einstellung der Regelstange umgesetzt werden können. Darüber hinaus ist im 'Fall des Ausführungsbeispieles gemäss Figur 2 als Sicherheitseinrichtung eine an eine hydraulische Steuereinrichtung angeschlossene Rückstellfedervorgesehen, mit der die Regelstange bei Bedarf aus jeder beliebigen Einsteltposition rasch in Nullfüllungsposition rückführbar ist. Die bekannte Steuereinrichtung erweist sich jedoch in jeder Beziehung sowohl vom Bauteil- als auch Platzbedarf her gesehen nicht nur, was die zuletzt genannte Sicherheitseinrichtung, sondern auch die gesamte mechanische Stellschritt-Übertragungseinrichtung anbelangt, als zu aufwendig.If an actuating step is triggered by the microprocessor that coincides with a delivery process of the injection pump, the adjustment of the control rod is initially blocked, but the energy accumulator temporarily takes one or more steps of the electric servomotor as a buffer and gives these temporarily stored steps when the Blocking of the control rod continues to this, so that all setting steps specified by the stepper motor can then be implemented in a corresponding setting of the control rod. In addition, in the case of the exemplary embodiment according to FIG. 2, a return spring connected to a hydraulic control device is provided as a safety device, with which the control rod can be quickly returned to the zero filling position from any set position if required. However, the known control device proves to be too expensive in every respect, not only in terms of component and space requirements, not only with regard to the last-mentioned safety device, but also the entire mechanical actuating step transmission device.

Bei Steuereinrichtungen der eingangs genannten Art sind für die Beherrschung der Schaltbefehle, die der Schrittmotor für eine entsprechende Einstellung der Regelstange durchzuführen hat, Bezugssignale und Kontrollsignale erforderlich. Die Bezugssignale, die dem Mikroprozessor als Führungsgrösse zuführbar sind, werden in der Regel durch bekannte Einrichtungen, z.B. Drehzahlgeber, die an der Kurbelwelle oder einer Nockenwelle der Brennkraftmaschine angeordnet sind, geliefert. Auf Rückmeldungen, ob die vom Mikroprozessor befehlsmässig ausgegebenen Stellbefehle vom Schrittmotor in korrekter Weise durchgeführt werden, wird in der Regel verzichtet. Letzteres deshalb, weil man bei Vorsehen eines in die Übertragungsglieder zwischen Schrittmotor und Regelstange eingeschalteten Federkraftspeichers davon ausgehen kann, dass von der Regelstange die gewünschte Position, wenn auch möglicherweise mit geringem zeitlichen Verzug, eingenommen wird. Diese Voraussetzung gilt jedoch nur für eine in ihrer Bewegung insgesamt ungehinderte Regelstange. Fälle, in denen die Regelstange, aus welchen Gründen auch immer, in irgendeiner Form nicht nur kurzfristig, sondern längerfristig blockiert ist, können so von der Steuereinrichtung nicht erfasst und daher nicht berücksichtigt werden. Auch dies erweist sich bei einer Steuereinrichtung nach der EP 00 69 111 B1 als nachteilig.In control devices of the type mentioned at the outset, reference signals and control signals are required to master the switching commands which the stepper motor has to carry out for a corresponding adjustment of the control rod. The reference signals, which can be supplied to the microprocessor as a command variable, are usually generated by known devices, e.g. Speed sensors, which are arranged on the crankshaft or a camshaft of the internal combustion engine, are supplied. There is usually no feedback as to whether the control commands issued by the microprocessor are carried out correctly by the stepper motor. The latter is because, if a spring force accumulator is connected to the transmission elements between the stepper motor and control rod, it can be assumed that the desired position will be taken up by the control rod, albeit possibly with a slight delay. However, this requirement only applies to a control rod that is generally unimpeded in its movement. Cases in which the control rod, for whatever reason, is blocked in some form not only in the short term, but in the longer term, cannot be detected by the control device and therefore cannot be taken into account. This also proves to be disadvantageous in a control device according to EP 00 69 111 B1.

Darüber hinaus ist jedoch aus der DE-OS 2417 771 schon eine wie der eingangs genannten ähnliche Steuereinrichtung bekannt. Dort sind ein Schrittmotor, Bewegungsübertragungsglieder zwischen diesem und der Regelstange, ferner eine Rückstellfeder, ein Schrittgeber und ein Drehzahlgeber vorgesehen, welche Bauteile alle innerhalb eines geschlossenen Gehäuses angeordnet sind, das an der Einspritzpumpe angeflanscht ist. Die besagten Bauteile sind ausserdem exakt auf den Typ der Einspritzpumpe abgestimmt, dem sie zugeordnet sind. Ausserdem kann der Rotor des dortigen Schrittmotors mit seiner Antriebswelle praktisch nur eine relativ geringe Drehbewegung von maximal 90° durchführen, wegen der dort offenbarten Bewegungsübertragungseinrichtung, um die Regelstange längs ihres gesamten Hubes zu verstellen. Dies lässt nur eine relativ grobe Einstellung zu. Die Kapselung der Bauteile in besagtem Gehäuse ist insofern nachteilig, als die darin eingeschlossenen Bauteile, z.B. bei einem Defekt, nicht ohne weitestgehende und umständliche Demontage des Gehäuses aus diesem entfernbar und durch andere Bauteile ersetzbar sind. Dadurch, dass die Teile der Baugruppe exakt an einen Einspritzpumpentyp angepasst sind, ist eine Verwendung dieser Baugruppe bei anderen Einspritzpumpen und Typen praktisch nicht möglich.In addition, however, a control device similar to that mentioned at the beginning is already known from DE-OS 2417 771. There is a stepper motor, motion transmission elements between this and the control rod, a return spring, a stepper and a speed sensor are provided, all of which are arranged within a closed housing which is flanged to the injection pump. The components in question are also precisely matched to the type of injection pump to which they are assigned. In addition, the rotor of the stepper motor there can practically only carry out a relatively small rotational movement of a maximum of 90 ° with its drive shaft, because of the movement transmission device disclosed there, in order to adjust the control rod along its entire stroke. This only allows a relatively rough setting. The encapsulation of the components in said housing is disadvantageous in that the components enclosed therein, e.g. in the event of a defect, they cannot be removed from the housing without extensive and cumbersome disassembly and can be replaced by other components. Because the parts of the assembly are exactly adapted to one injection pump type, this assembly is practically impossible for other injection pumps and types.

Es ist aus Sicht des Standes der Technik daher Aufgabe der Erfindung, eine Steuereinrichtung der eingangs genannten Art so auszubilden, dass sie auch Mittel für eine Bezugssignal- und Kontrollsignallieferung aufweist, trotzdem äusserst wenig Platz an einer Einspritzpumpe beansprucht und mit minimalem Aufwand auch an unterschiedliche Typen von Einspritzpumpen anpassbar sowie bei Defekten reparierbar ist.From the point of view of the prior art, it is therefore an object of the invention to design a control device of the type mentioned at the outset in such a way that it also has means for a reference signal and control signal delivery, yet takes up very little space on an injection pump and, with minimal effort, also of different types can be adapted by injection pumps and repaired in the event of defects.

Diese Aufgabe ist erfindungsgemäss durch die in den Kennzeichen der Ansprüche 1 und 2 angegebene Ausgestaltung der Steuereinrichtung gelöst.This object is achieved according to the invention by the configuration of the control device specified in the characterizing part of claims 1 and 2.

Durch die erfindungsgemässe Anordnung der einzelnen Bauelemente der Steuereinrichtung ergibt sich eine sehr kompakte Gesamtanordnung, die entweder komplett oder grösstenteils vormontiert aussen an der Einspritzpumpe befestigbar ist. Je nach Ausführungsform können mithin verschiedene Teile schon an der Einspritzpumpe, dort an deren Welle bzw. der Regelstange angebracht sein, welche Einspritzpumpenteile als für diese Anbringung entsprechend vorbereitet sind. Darüber hinaus ist aufgrund der Ausgestaltung der erfindungsgemässen Steuereinrichtung eine Anpassung derselben von den Bauteilen her an unterschiedliche Typen von Einspritzpumpen mit minimalem Aufwand möglich. Für den Fall, dass beispielsweise ein anderer Schrittmotor benötigt wird, kann der vorhandene vom Gehäuse abgebaut und an letzteres ein anderer angeflanscht werden. Für den Fall, dass ein anderer Schrittgeber benötigt wird, wird der vorhandene vom Gehäuse abgebaut und durch Anbau eines anderen ersetzt. Gleiches geschieht auch im Fall, wenn ein anderer Drehzahlgeber oder ein anderes Untersetzungsgetriebe benötigt wird, wobei das jeweilige Bauteil als solches ausgebaut bzw. abgebaut und durch ein entsprechend anderes ersetzbar ist. Die erfindungsgemässe Steuereinrichtung erlaubt jederzeit auch eine Umrüstung von Fliehkraftregler-betätigten Einspritzpumpen auf elektronisch-mechanisch gesteuerte Einspritzpumpen, wobei aufgrund der vorstehend erwähnten Möglichkeiten eine universelle Anpassbarkeit an die Charakteristik der jeweiligen Einspritzpumpe gegeben ist. Die erfindungsgemässe Steuereinrichtung erweist sich auch von der Logistik her gesehen, insbesondere im Lager- und Servicebereich, insofern als sehr vorteilhaft, weil eben eine Reihe von unterschiedlichen Bauteilen in einem einzigen Steuerblock zusammengefasst sind.The arrangement of the individual components of the control device according to the invention results in a very compact overall arrangement, which can be fastened to the injection pump either completely or largely pre-assembled. Depending on the embodiment, different parts can therefore already be attached to the injection pump, there to its shaft or the control rod, which injection pump parts are prepared as appropriate for this attachment. In addition, due to the design of the control device according to the invention, the components can be adapted to different types of injection pumps with minimal effort. In the event that a different stepper motor is required, for example, the existing one can be removed from the housing and another can be flanged to the latter. In the event that a different encoder is required, the existing one is removed from the housing and replaced by another. The same also happens in the case when a different speed sensor or a different reduction gear is required, the respective component as such is expanded or dismantled and can be replaced by a correspondingly different one. The control device according to the invention also allows retrofitting of centrifugal governor-operated injection pumps to electronically-mechanically controlled injection pumps at any time, and because of the abovementioned possibilities there is universal adaptability to the characteristics of the respective injection pump. The control device according to the invention also proves to be very advantageous from a logistics perspective, particularly in the storage and service area, because a number of different components are combined in a single control block.

Nachstehend ist die erfindungsgemässe Steuereinrichtung beispielhaft anhand der Zeichnung näher erläutert. In der Zeichnung zeigen:

  • Figur 1 in Seitenansicht eine Ausführungsform der erfindungsgemässen Steuereinrichtung, angebaut an eine Kraftstoffeinspritzpumpe,
  • Figur 2 einen Schnitt durch diese Steuereinrichtung entlang der in Figur 4 eingetragenen Schnittlinie 11-11,
  • Figur 3 in Vorderansicht die Steuereinrichtung gemäss Figur 1 als solche in Richtung des Pfeiles 111,
  • Figur 4 einen Schnitt durch diese Steuereinrichtung als solche entlang der in Figur 5 eingetragenen Schnittlinie IV-IV,
  • Figur 5 einen Schnitt durch diese in Anbaulage an der Kraftstoffeinspritzpumpe dargestellte Steuereinrichtung entlang der in Figur 3 eingetragenen Schnittlinie V-V,
  • Figur 6 einen Schnitt durch diese Steuereinrichtung entlang der Schnittlinie VI-VI von Figur2,
  • Figur 7 einen Schnitt durch diese Steuereinrichtung entlang der Linie VII-VII von Figur 2,
  • Figur 8 einen Schnitt durch eine im Bereich des Drehzahlgebers alternative Steuereinrichtung,
  • Figur 9 in Explosionsdarstellung eine Teileanordnung der Steuereinrichtung nach Figur 1 bis 8 vor deren Endmontage an der Kraftstoffeinspritzpumpe,
  • Figur 10 in Explosionsdarstellung eine Teileanordnung einer alternativen Steuereinrichtung vor deren Endmontage nach einem ersten Montage-Prinzip,
  • Figur 11 in Explosionsdarstellung eine Teileanordnung der alternativen Steuereinrichtung gemäss Figur 10 vor deren Endmontage nach einem zweiten Montage-Prinzip, und
  • Figur 12 eine Vorderansicht der in Figur 10 und 11 verwendeten Kraftübertragungsstange.
The control device according to the invention is explained in more detail below by way of example with reference to the drawing. The drawing shows:
  • FIG. 1 shows a side view of an embodiment of the control device according to the invention, attached to a fuel injection pump,
  • FIG. 2 shows a section through this control device along the section line 11-11 shown in FIG. 4,
  • 3 shows a front view of the control device according to FIG. 1 as such in the direction of arrow 111,
  • FIG. 4 shows a section through this control device as such along the section line IV-IV entered in FIG. 5,
  • 5 shows a section through this control device shown in the installed position on the fuel injection pump, along the section line VV entered in FIG. 3,
  • FIG. 6 shows a section through this control device along the section line VI-VI from FIG. 2,
  • FIG. 7 shows a section through this control device along the line VII-VII of FIG. 2,
  • FIG. 8 shows a section through an alternative control device in the area of the speed sensor,
  • FIG. 9 shows an exploded view of an arrangement of parts of the control device according to FIGS. 1 to 8 prior to its final assembly on the fuel injection pump,
  • FIG. 10 shows an exploded view of an arrangement of parts of an alternative control device before its final assembly according to a first assembly principle,
  • FIG. 11 shows an exploded view of an arrangement of parts of the alternative control device according to FIG. 10 before its final assembly according to a second assembly principle, and
  • Figure 12 is a front view of the power transmission rod used in Figures 10 and 11.

In den Figuren sind gleiche bzw. einander entsprechende Bauteile der verschiedenen Ausführungsbeispiele mit gleichen Bezugszeichen angezogen.In the figures, identical or corresponding components of the different exemplary embodiments are drawn with the same reference numerals.

Die nachfolgend im Detail beschriebene Steuereinrichtung dient zur Verstellung des Einspritzzeitpunktes und/oder der Fördermenge einer Kraftstoffeinspritzpumpe für Brennkraftmaschinen. Die Kraftstoffeinspritzpumpe ist mit ihrem Gehäuse lediglich im Anschlussbereich für die erfindungsgemässe Steuereinrichtung dargestellt und mit (1) bezeichnet. Innerhalb der Kraftstoffeinspritzpumpe (1) erfolgt die Verstellung der nicht durchgestellten Förderorgane direkt oder indirekt über eine Regelstange (2). An diese Regelstange (2) sind von einem nicht dargestellten, in der Regel mit der elektronischen Motorsteuerung zusammengefassten Mikroprozessor ausgegebene Stellbefehle von einem elektrischen Schrittmotor (3) über mehrere Bewegungsübertragungsglieder mit zwischengeschaltetem Federkraftspeicher (4) übertragbar. Der Federkraftspeicher (4) kann einen oder mehrere Schritte des elektrischen Schrittmotors (3) vorübergehend aufnehmen, was insbesondere dann der Fall ist, wenn vom Mikroprozessor ein Stellschritt ausgelöst wird, der zeitlich mit einem Fördervorgang der Kraftstoffeinspritzpumpe zusammenfällt und dadurch der Verstellung der Regelstange (2) eine erhöhte Kraft entgegenwirkt. Nach Aufhebung dieser relativ kurzfristigen Regelstangen-Blockade werden die vom Federkraftspeicher (4) kraftmässig aufgenommenen Stellschritte unter seiner Entspannung wieder an die Regelstange (2) weitergeleitet, so dass diese, wenn auch zeitlich etwas gegenüber dem Stellimpuls versetzt, ihre richtige Einstellposition einnehmen kann.The control device described in detail below serves to adjust the injection timing and / or the delivery rate of a fuel injection pump for internal combustion engines. The fuel injection pump is shown with its housing only in the connection area for the control device according to the invention and is designated by (1). Within the fuel injection pump (1), the delivery elements that are not put through are adjusted directly or indirectly via a control rod (2). Control commands issued by a microprocessor (not shown), which is usually combined with the electronic motor controller, can be transmitted to this control rod (2) by an electric stepper motor (3) via a plurality of movement transmission elements with an intermediate spring force accumulator (4). The spring force accumulator (4) can temporarily take up one or more steps of the electric stepper motor (3), which is particularly the case when an actuating step is triggered by the microprocessor, which coincides with a delivery process of the fuel injection pump and thereby the adjustment of the control rod (2 ) counteracts an increased force. After this relatively short-term control rod blockage has been removed, the adjustment steps which are force-absorbed by the spring force accumulator (4) are passed on to the control rod (2) under its relaxation, so that it can assume its correct setting position, even if it is offset somewhat in time from the control pulse.

Des weiteren ist der Regelstange (2) eine Rückstellfeder (5) zugeordnet, die dazu dient und kräftemässig im Hinblick auf die an der Regelstange (2) angeschlossenen Teile der Steuereinrichtung so bemessen ist, dass die Regelstange (2) aus jeder beliebigen Einstellposition in Nullfüllungsposition rückführbar ist.Furthermore, the control rod (2) is assigned a return spring (5) which serves and is dimensioned in terms of force with respect to the parts of the control device connected to the control rod (2) in such a way that the control rod (2) is in any setting position in the zero filling position is traceable.

Als schrittmotorseitiges Bewegungsübertragungsglied ist bei den dargestellten Ausführungsbeispielen der erfindungsgemässen Steuereinrichtung ein spezielles Zahnraduntersetzungsgetriebe (6) vorgesehen, das getrieblich zwischen Schrittmotor (3) und Federkraftspeicher (4) eingeschaltet ist. Als regelstangenseitiges Bewegungsübertragungsglied kommt eine Kraftübertragungsstange (7) zur Anwendung, die die Verbindung zwischen Federkraftspeicher (4) und Regelstange (2) herstellt.In the illustrated exemplary embodiments of the control device according to the invention, a special gear-reduction gear (6) is provided as the movement motor-side movement transmission element, which is switched on between the stepping motor (3) and the spring force accumulator (4). A force transmission rod (7) is used as the control rod-side movement transmission element, which establishes the connection between the spring force accumulator (4) and the control rod (2).

Die erfindungsgemässe Steuereinrichtung umfasst des weiteren generell einen mechanischen Drehzahlgeber (8), der die Drehzahl der Einspritzpumpenwelle (9) erfasst und entsprechende Signale an den Mikroprozessor liefert. Als weiteres Teil der erfindungsgemässen Steuereinrichtung ist ein elektromechanischer Schrittgeber (10) vorgesehen, der vom Schrittmotor (3) aus antreibbar ist, dessen durchgeführte Schritte erfasst und entsprechende Signale an den Mikroprozessor rückleitet.The control device according to the invention generally further comprises a mechanical speed sensor (8) which detects the speed of the injection pump shaft (9) and delivers corresponding signals to the microprocessor. As a further part of the control device according to the invention, an electromechanical step transmitter (10) is provided, which can be driven from the step motor (3), detects the steps it has carried out, and returns corresponding signals to the microprocessor.

Tragendes Organ für zumindest einen Grossteil der vorstehend genannten Bauteile der erfindungsgemässen Steuereinrichtung ist eine Grundplatte (11), die aussen an der Kraftstoffeinspritzpumpe (1) befestigbar ist.The supporting element for at least a large part of the above-mentioned components of the control device according to the invention is a base plate (11) which can be attached to the outside of the fuel injection pump (1).

Nachstehend ist auf Einzelheiten der erfindungsgemässen Steuerungseinrichtung eingegangen.The details of the control device according to the invention are discussed below.

Der Federkraftspeicher (4) besteht aus zwei gegeneinander beweglichen, zwischen sich eine vorgespannte Druckfeder (12) aufnehmenden Federtellern (13, 14), deren maximaler Abstand voneinander durch Anschläge (15, 16) in einem sie übergreifenden Gehäuse (17) begrenzt ist. Das Gehäuse (17) ist hohlzylindrisch ausgebildet; im Bereich eines Endes ist der Anschlag (15) durch einen nach aussen hin durch einen Sicherungsring (18) gekonterten Anschlagring (19) gebildet. Der andere Anschlag (16) ist durch einen andernendes des Gehäuses (17) ausgebildeten Anschlagbund (20) realisiert. Dieser so ausgebildete Federkraftspeicher (4) wird der Länge nach zumindest über seine beiden Federteller (13, 14) hinaus von der Kraftübertragungsstange (7), wenn diese montiert ist, durchdrungen und ist dann zwischen zwei an letzterer angeordneten Anschlägen (21, 22) aufgenommen. Beim Ausführungsbeispiel gemäss Figur 1 bis 7 und 9 handelt es sich bei diesen Anschlägen (21, 22), die die beiden Federteller (13, 14) des Federkraftspeichers (4) zwischen sich aufnehmen, um zwei in Ringnuten der Kraftübertragungsstange (7) eingesetzte Sicherungsringe. Beim Ausführungsbeispiel gemäss Figur 10 bis 12 dagegen ist der in der Zeichnung rechte Anschlag (22) durch einen durchmessergrösseren Bund an der Kraftübertragungsstange (7) und nur der in der Zeichnung rechte Anschlag (22) durch einen durchmessergrösseren Bund an der Kraftübertragungsstange (7) und nur der in der Zeichnung links dargestellte Anschlag (21) durch einen in eine Ringnut (21 /1) der Kraftübertragungsstange (7) einsetzbaren Sicherungsring gebildet.The spring force accumulator (4) consists of two mutually movable, one between them Prestressed compression spring (12) receiving spring plates (13, 14), the maximum distance from each other is limited by stops (15, 16) in a housing (17) spanning them. The housing (17) is hollow cylindrical; in the area of one end the stop (15) is formed by a stop ring (19) which is countered to the outside by a locking ring (18). The other stop (16) is realized by a different end collar (20) formed in the housing (17). This spring force accumulator (4) designed in this way is penetrated lengthwise at least beyond its two spring plates (13, 14) by the force transmission rod (7) when it is mounted, and is then received between two stops (21, 22) arranged on the latter . In the exemplary embodiment according to FIGS. 1 to 7 and 9, these stops (21, 22), which hold the two spring plates (13, 14) of the spring force accumulator (4) between them, are two circlips inserted in ring grooves of the force transmission rod (7) . In the exemplary embodiment according to FIGS. 10 to 12, on the other hand, the right stop (22) in the drawing is by a larger diameter collar on the power transmission rod (7) and only the right stop (22) in the drawing by a larger diameter collar on the power transmission rod (7) and only the stop (21) shown on the left in the drawing is formed by a locking ring which can be inserted into an annular groove (21/1) of the force transmission rod (7).

Am Gehäuse (17) des Federkraftspeichers (4) istaussen achsparallel zur Bildung einer Zahnstange eine entsprechend geradlinige Verzahnung (23) angeordnet. Mit dieser geradlinigen Verzahnung (23) ist das Zahnraduntersetzungsgetriebe (6) getrieblich verbunden, das krafteinleitungsseitig mit dem Schrittmotor (3) gekoppelt ist. Dieses in allen Ausführungsbeispielen gleich ausgebildete und in seinen Einzelheiten gut aus Figur 4 ersichtliche Zahnraduntersetzungsgetriebe (6) ist ebenso wie der Federkraftspeicher (4) in einem gemeinsamen Gehäuse (24) untergebracht. Dieses Gehäuse (24) ist fest an der Grundplatte (11) angeordnet und dort mit einem in eine Durchgangsbohrung (11/1) eintauchenden Zentrierbund (24/1) lagemässig richtig fixiert. An diesem Gehäuse (24) ist an dessen einer Seite der Schrittmotor (3) und an dessen anderer Seite der Schrittgeber (10) angeordnet. Dabei ist der Schrittmotor (3), wie aus Figur 3 und 4 ersichtlich, mit seinem Gehäuse (25) aussen an der einen Seitenwand (26) des Gehäuses (24) angeflanscht, dort mittelbar lagefixiert und mittels Schrauben (27) lösbar befestigt. Für die Lagefixierung ist, wie aus Figur 4 ersichtlich, in die Seitenwand (26) des Gehäuses (24) eine zylindrische Vertiefung (28) eingeformt, in die ein die Anschlussfläche am Schrittmotor-Gehäuse (25) überragender Zentrierbund (29) eingreift. Im Gehäuse (24) sind ein Aufnahmeraum (30) für das Untersetzungsgetriebe (6) und eine Aufnahmebohrung (31) für den Federkraftspeicher (4) vorhanden. Der Aufnahmeraum (30) ist zum Schrittgeber (10) hin offen, wenn dieser am Gehäuse (24) montiert ist, aber durch den Boden (32) von dessen Gehäuse (33) abgedeckt. Im montierten Zustand ist der Schrittgeber (10) an der der Seitenwand (26) parallel gegenüberliegenden anderen Seitenwand (34) des Gehäuses (24) aussen angeflanscht, dort mittelbar lagefixiert und mittels Schrauben (35) lösbar befestigt. Zur Lagefixierung des Schrittgeber-Gehäuses (33) in bezug auf das Gehäuse (24) ist an letzterem an der Seitenwand (34) ein vorspringender Zentrierbund (36) vorgesehen, der in eine entsprechend angepasste Zentriervertiefung (37) im Boden (32) des Schrittgeber-Gehäuses (33) eingreift. Zur Verdrehungssicherung ist ausserdem ein Querstift (38) vorgesehen, der zueinander fluchtende Aufnahmebohrungen in der GehäuseSeitenwand (34) und im Boden (32) des Schrittgeber-Gehäuses (33) durchdringt.A correspondingly straight toothing (23) is arranged on the housing (17) of the spring force accumulator (4) axially parallel to the formation of a toothed rack. The gear reduction gear (6), which is coupled to the stepper motor (3) on the force introduction side, is connected to this linear toothing (23). This gear reduction gear (6), which is of the same design in all of the exemplary embodiments and can be seen in its details from FIG. 4, is accommodated in a common housing (24), just like the spring force accumulator (4). This housing (24) is fixedly arranged on the base plate (11) and is correctly fixed there with a centering collar (24/1) immersed in a through hole (11/1). On this housing (24), the stepper motor (3) is arranged on one side and the stepper (10) on the other side. The stepper motor (3), as can be seen in FIGS. 3 and 4, is flanged with its housing (25) on the outside to the one side wall (26) of the housing (24), indirectly fixed there and releasably fastened by means of screws (27). 4, a cylindrical recess (28) is formed in the side wall (26) of the housing (24), into which a centering collar (29) which projects beyond the connection surface on the stepper motor housing (25) is formed. In the housing (24) there is a receiving space (30) for the reduction gear (6) and a receiving bore (31) for the spring force accumulator (4). The receiving space (30) is open to the pacemaker (10) when it is mounted on the housing (24), but is covered by the bottom (32) of its housing (33). In the assembled state, the step encoder (10) is flanged to the outside of the other side wall (34) of the housing (24), which is parallel to the side wall (26), is indirectly fixed there and is detachably fastened by means of screws (35). In order to fix the position of the pacemaker housing (33) in relation to the housing (24), a protruding centering collar (36) is provided on the latter on the side wall (34), which projects into a correspondingly adapted centering recess (37) in the base (32) of the pacemaker - engages housing (33). To prevent rotation, a transverse pin (38) is also provided, which penetrates mutually aligned receiving bores in the housing side wall (34) and in the bottom (32) of the pacemaker housing (33).

Die mit (39) bezeichnete Motorwelle des Schrittmotors (3) ist im dargestellten Ausführungsbeispiel über eine Nut-Feder-Verbindung (40) mit der Eingangswelle (41 ) des Zahnraduntersetzungsgetriebes (6) gekoppelt. Dabei übergreift die Eingangswelle (41) mit ihrem einen hohlzylindrischen Ende die Motorwelle (39) und ist in diesem Bereich in einer Bohrung (42) in der Seitenwand (26) des Gehäuses (24) gelagert. Ein Dichtungsring (43) verhindert einen Durchtritt von Lecköl zum Schrittmotor (3). Die Eingangswelle (41) durchsetzt den Getriebe-Aufnahmeraum (30) für das Zahnraduntersetzungsgetriebe (6) in achsparalleler Richtung vollständig, ragt bis in das Schrittgeber-Gehäuse (25) hinein und ist in dessen Boden (32) mittels eines dort eingesetzten Kugellagers (44) gelagert. Die Eingangswelle (41 ) trägt diesseits des Kugellagers (44), also innerhalb des Aufnahmeraumes (30) ein erstes Zahnrad (45) des Zahnraduntersetzungsgetriebes (6) und jenseits des Kugellagers (44), also innerhalb des Schrittgeber-Gehäuses (33) einen impulserzeugenden Rotor (46) als Teil des Schrittgebers (10).The motor shaft of the stepping motor (3), designated by (39), is coupled in the exemplary embodiment shown via a tongue and groove connection (40) to the input shaft (41) of the gear reduction gear (6). The input shaft (41) overlaps the motor shaft (39) with its one hollow cylindrical end and is mounted in this area in a bore (42) in the side wall (26) of the housing (24). A sealing ring (43) prevents leakage oil from passing to the stepper motor (3). The input shaft (41) passes completely through the gearbox receiving space (30) for the gear reduction gearbox (6) in the direction parallel to the axis, extends into the stepper housing (25) and is in the bottom (32) thereof by means of a ball bearing (44 ) stored. The input shaft (41) on this side of the ball bearing (44), i.e. within the receiving space (30) carries a first gear (45) of the gear reduction gear (6) and on the other side of the ball bearing (44), i.e. within the encoder housing (33) generates a pulse Rotor (46) as part of the pacemaker (10).

Das Zahnraduntersetzungsgetriebe (6) besteht ausser dem Zahnrad (45) noch aus einem zweiten Zahnrad (47) und einem dritten Zahnrad (48). Die beiden Zahnräder (47, 48) sind voneinander beabstandet auf der Abtriebswelle (49) des Zahnraduntersetzungsgetriebes (6) angeordnet. Letztere ist im Bereich ihres einen Endes in der Seitenwand (26) des Gehäuses (24) in einem dort eingesetzten Kugellager (50) und im Bereich ihres anderen Endes im Boden (32) des Schrittgeber-Gehäuses (33) in einem dortigen Kugellager (51) gelagert. Die Abtriebswelle (49) ist achsparallel zur Eingangswelle (41) angeordnet. Das zweite Zahnrad (47) kämmt mit dem ersten Zahnrad (45) und ist demgegenüber durchmessergrösser. Das dritte Zahnrad (48) des Zahnraduntersetzungsgetriebes (6) steht in Eingriff mit der längs des Gehäuses (17) des Federkraftspeichers (4) aussen an diesem angeordneten geradlinigen Verzahnung (23):. Das Übersetzungsverhältnis des Zahnraduntersetzungsgetriebes (6) ist durch den Durchmesser bzw. die jeweilige Zähnezahl der drei Zahnräder (45, 47, 48) bestimmt. Bei den dargestellten Ausführungsbeispielen besitzt das erste Zahnrad (45) zehn Zähne, das zweite Zahnrad (47) fünfundzwanzig Zähne und das dritte Zahnrad (48) Zähne.The gear reduction gear (6) consists, in addition to the gear (45), of a second gear (47) and a third gear (48). The two gear wheels (47, 48) are spaced apart from one another on the output shaft (49) of the gear reduction gear (6). The latter is in the region of its one end in the side wall (26) of the housing (24) in a ball bearing (50) used there and in the region of its other end in the bottom (32) of the pacemaker housing (33) in a ball bearing (51 ) stored. The output shaft (49) is arranged axially parallel to the input shaft (41). The second gear (47) meshes with the first gear (45) and is larger in diameter. The third gear (48) of the gear reduction gear (6) is in engagement with the linear toothing (23) arranged on the outside along the housing (17) of the spring force accumulator (4). The transmission ratio of the gear reduction gear (6) is determined by the diameter or the number of teeth of the three gear wheels (45, 47, 48). With the darge Illustrated embodiments, the first gear (45) has ten teeth, the second gear (47) twenty-five teeth and the third gear (48) teeth.

Der Federkraftspeicher (4) ist in der Aufnahmebohrung (31) in einer senkrecht zu den Wellen (41, 49) des Zahnraduntersetzungsgetriebes (6) stehenden Ebene bei Rotation des dritten Zahnrades (48) axial verschiebbar, und zwar zwischen zwei Einstellungen. Eine dieser beiden Einstellungen entspricht der maximalen Füllungsbestellung der Regelstange (2) und ist durch einen nicht dargestellten an bzw. in der Kraftstoffeinspritzpumpe (1) gegebenen Anschlag begrenzt. Die zweite Endstellung, die der Nullfüllungsstellung entspricht, ist in der Aufnahmebohrung (31 ) durch einen dort angeordneten Anschlag begrenzt, der durch einen in eine Ringnut eingesetzten Sicherungsring (52) gebildet ist. Im Anschluss an diesen Sicherungsring (52) ist die Aufnahmebohrung (31) für den Federkraftspeicher (4) über einen durch einen weiteren in einer Ringnut eingesetzten Sicherungsring (53) gekonterten, von einem Dichtungsring aussen umgebenen Verschlussstopfen (54) gegen den Austritt von Lecköl abgesichert, das von der Kraftstoffeinspritzpumpe (1) her in sie eintreten kann.The spring force accumulator (4) is axially displaceable in the receiving bore (31) in a plane perpendicular to the shafts (41, 49) of the gear reduction gear (6) when the third gear (48) rotates, between two settings. One of these two settings corresponds to the maximum filling order for the control rod (2) and is limited by a stop, not shown, on or in the fuel injection pump (1). The second end position, which corresponds to the zero filling position, is limited in the receiving bore (31) by a stop arranged there, which is formed by a locking ring (52) inserted into an annular groove. Following this locking ring (52), the receiving bore (31) for the spring force accumulator (4) is secured against leakage of leakage oil by a locking plug (54), which is countered by a further locking ring (53) and is surrounded by a sealing ring that can enter it from the fuel injection pump (1).

Die den Federkraftspeicher (4) aufnehmende Aufnahmebohrung (31 ) durchdringt das Gehäuse (24) vollständig und schneidet dabei, um einen Durchtritt für das dritte Zahnrad (48) des Zahnraduntersetzungsgetriebes (6) zu schaffen, den Aufnahmeraum (30) desselben.The receiving bore (31) receiving the spring force accumulator (4) completely penetrates the housing (24) and cuts the receiving space (30) of the same in order to create a passage for the third gear (48) of the gear reduction gear (6).

An der Grundplatte (11 ) ist ausser dem Gehäuse (24) auch der Drehzahlgeber (8) in nachstehender näher beschriebener Weise angeordnet. Dabei trägt die Grundplatte (11) zumindest das Gehäuse (55) des Drehzahlgebers, wobei dieses Gehäuse (55) fest an der Grundplatte (11) angeordnet, angeschweisst, angeformt oder angeschraubt ist. Mit (56) ist der Gehäusedeckel des Drehzahlgebers (8) bezeichnet, der mittels Schrauben (57) am Gehäuse (55) gehalten ist. Diese Schrauben (57) dienen gleichzeitig auch zur Befestigung der Grundplatte (11) an der Kraftstoffeinspritzpumpe (1), durchdringen dabei das Gehäuse (55) des Drehzahlgebers (8) und Löcher in der Grundplatte (11) in axialer Richtung vollständig und greifen in Anbaulage an der Kraftstoffeinspritzpumpe (1) in dort vorhandene Gewindebohrungen ein. Zur weiteren Befestigung der Grundplatte (11) an der Kraftstoffeinspritzpumpe (1 ) sind noch Schrauben (58) vorgesehen.In addition to the housing (24), the speed sensor (8) is also arranged on the base plate (11) in the manner described in more detail below. The base plate (11) carries at least the housing (55) of the speed sensor, this housing (55) being fixed, welded, molded or screwed onto the base plate (11). (56) denotes the housing cover of the speed sensor (8), which is held on the housing (55) by means of screws (57). These screws (57) also serve to fasten the base plate (11) to the fuel injection pump (1), penetrate the housing (55) of the speed sensor (8) and holes in the base plate (11) completely in the axial direction and engage in the mounting position on the fuel injection pump (1) in the threaded holes there. Screws (58) are also provided for further fastening the base plate (11) to the fuel injection pump (1).

Die signalerzeugenden Organe des Schrittgebers (10) und des Drehzahlgebers (8) sind aus prinzipiell gleichen Bauteilen gebildet. Bei diesen signalerzeugenden Organen handelt es sich um impulserzeugende Rotoren, wobei der Rotor (46) des Schrittgebers (10) bereits weiter vorn erwähnt wurde und der impulserzeugende Rotor des Drehzahlgebers (8) mit (59) bezeichnet ist. Jeder dieser impulserzeugenden Rotoren (46 bzw. 59) besteht aus einer über eine Nabe (60) an (46) bzw. (61) an (59) an der jeweiligen für den Antrieb sorgenden Welle (41 bzw. 9) anschliessbaren bzw. angeschlossenen, runden Scheibe (62) an (60) bzw. (63) an (61), an deren jeweiliger Peripherie axial vorspringend und sich längs einer koaxialen Kreisbahn in gleichmässigen Abständen erstrekkende, gleich ausgebildete Impulserzeugungsorgane (64) an (62) bzw. (65) an (63) angeordnet sind. Die einzelnen Impulserzeugungsorgane haben eine Rohrabschnittssegmentform. Den Impulserzeugungsorganen (65) des Drehzahlgebers (8) sind zwei Magnetgabelschranken (66, 67), den Impulserzeugungsorganen (64) des Schrittgebers (10) dagegen ist nur eine Magnetgabelschranke (68) zugeordnet. Die Magnetgabelschranken (66, 67) des Drehzahlgebers (8) sind, wie aus den Figuren 4, 5 und 8 ersichtlich, jeweils an einer Platine (69) bzw. (70) angeordnet, die an der Innenseite des Gehäusedeckels (56) des Drehzahlgeber-Gehäuses (33) jeweils durch zwei Schrauben (71) bzw. (72) befestigt sind. Jede dieser Platinen (69, 70) ist an ein nicht dargestelltes und zum Mikroprozessor führendes Impulsabnahmekabel angeschlossen, das durch jeweils eine Öffnung (73) bzw. (74) im Gehäusedeckel (56) hindurchgeführt ist. Die Magnetgabelschranke (68) des Schrittgebers (10) ist ebenfalls auf einer Platine (75) angeordnet, die an der Innenseite eines Gehäusedeckels (76) des Schrittgeber-Gehäuses (33) mittels Schrauben (77) befestigt ist. Der Gehäusedeckel (76) ist im Schrittgeber-Gehäuse (33) durch einen Zentrierbund (78) lagemässig fixiert und durch mehrere, weiter vorn bereits erwähnte Schrauben (35), die auch zur Festlegung des Schrittgeber-Gehäuses (33) am Gehäuse (24) dienen, festgelegt. Auch die Platine (75) ist über ein nicht dargestelltes, durch eine Öffnung (79) im Gehäusedeckel (76) durchgeführtes und andernendes am Mikroprozessor angeschlossenes Impulsaufnahmekabel mit letzterem verbunden.The signal-generating organs of the pacemaker (10) and the speed sensor (8) are basically made of the same components. These signal-generating organs are pulse-generating rotors, the rotor (46) of the pacemaker (10) being mentioned earlier and the pulse-generating rotor of the speed sensor (8) being designated (59). Each of these pulse-generating rotors (46 and 59) consists of a hub (60) on (46) or (61) on (59) on the respective shaft (41 or 9) that provides the drive , round disk (62) on (60) or (63) on (61), on the respective periphery of which project axially and extend along a coaxial circular path at uniform intervals, equally designed pulse generating elements (64) on (62) or ( 65) are arranged on (63). The individual pulse generating elements have a tubular segment segment shape. Two magnetic fork barriers (66, 67) are assigned to the pulse generating elements (65) of the speed sensor (8), while only one magnetic fork barrier (68) is assigned to the pulse generating elements (64) of the step generator (10). As can be seen from FIGS. 4, 5 and 8, the magnetic fork barriers (66, 67) of the speed sensor (8) are each arranged on a circuit board (69) or (70) on the inside of the housing cover (56) of the speed sensor - Housing (33) are each fastened by two screws (71) and (72). Each of these boards (69, 70) is connected to a pulse pick-up cable (not shown) which leads to the microprocessor and which is led through an opening (73) and (74) in the housing cover (56). The magnetic fork barrier (68) of the pacemaker (10) is also arranged on a circuit board (75) which is fastened to the inside of a housing cover (76) of the pacemaker housing (33) by means of screws (77). The housing cover (76) is fixed in position in the pacemaker housing (33) by a centering collar (78) and by several screws (35) mentioned earlier, which are also used to fix the pacemaker housing (33) to the housing (24). serve, set. The circuit board (75) is also connected to the latter via a pulse pick-up cable (not shown), which is passed through an opening (79) in the housing cover (76) and is connected to the other side of the microprocessor.

Die Magnetgabelschranken (66, 67) bzw. (68) erstrecken sich jeweils beiderseits der Kreisbahn, die die Impulserzeugungsorgane (64, 65) des Drehzahlgebers (8) bzw. des Schrittgebers (10) bei Rotation der jeweiligen Scheibe (62) bzw. (63) beschreiben, und bilden jeweils ein Magnetfeld, so dass bei Durchgang jeweils eines der Impulserzeugungsorgane (64) bzw. (65) ein dem Drehwinkel bzw. Drehschritt repräsentativer Hallimpuls erzeugbar ist.The magnetic fork barriers (66, 67) and (68) each extend on both sides of the circular path, which the pulse generating elements (64, 65) of the speed sensor (8) or the step sensor (10) when the respective disk (62) or ( 63) describe and each form a magnetic field, so that when one of the pulse generating elements (64) or (65) passes through, a Hall pulse representative of the angle of rotation or step of rotation can be generated.

Bei der Welle, an die der impulserzeugende Rotor (46) des Schrittgebers (10) angeschlossen ist, handelt es sich um die in das Gehäuse (33) des letzteren hineinverlängerte Eingangswelle (41) desZahnraduntersetzungsgetriebes (6). Die Nabe (60) ist dabei am äusseren freien Ende der Eingangswelle (41) über Distanzstücke (80,81) sowie eine Kegelscheibenfeder (82) auf Abstand in bezug auf das Kugellager (44) gehalten und mittels einer auf einem Gewindezapfen (83) aufgeschraubten Mutter (84) mitzwischengelegter Beilagscheibe (85) befestigt. Der Schrittgeber (10) ist auf diese Weise komplett als solches und am Gehäuse (24) vormontierbar. Der Vorteil dieser Bauweise besteht jedoch darin, dass, sofern ein Schrittgeber mit anderen Einzelteilen, insbesondere anderen impulserzeugenden und signalerzeugenden Organen notwendig ist, diese Teile jederzeit auf einfache Weise austauschbar sind, und zwar ohne dass an den anderen Bauteilen der Steuereinrichtung manipuliert werden müsste. Entsprechendes gilt auch bei einem Defekt von Schrittgeberbauteilen.The shaft to which the pulse generating rotor (46) of the pacemaker (10) is connected is the input shaft (41) of the gear reduction gear (6) which is extended into the housing (33) of the latter. The hub (60) is held at a distance with respect to the ball bearing (44) at the outer free end of the input shaft (41) via spacers (80, 81) and a conical disk spring (82) and is screwed onto a threaded pin (83) Nut (84) fastened with a washer (85). In this way, the step encoder (10) can be completely preassembled as such and on the housing (24). The advantage of this design, however, is that, if a pacemaker with other individual parts, in particular whose other pulse-generating and signal-generating organs are necessary, these parts can be replaced at any time in a simple manner, without having to be manipulated on the other components of the control device. The same applies to defective pacemaker components.

Für die Befestigung des impulserzeugenden Rotors (59) des Drehzahlgebers (8) sind grundsätzlich zwei verschiedene Methoden möglich, wobei die eine Anschlussvariante aus Figur 5 und die andere Anschlussvariante aus Figur 8 ersichtlich ist.Basically, two different methods are possible for fastening the pulse-generating rotor (59) of the speed sensor (8), one connection variant from FIG. 5 and the other connection variant from FIG.

Bei der Anschlussvariante gemäss Figur 5 wird der impulserzeugende Rotor (59) des Drehzahlgebers (8) direkt am aus der Kraftstoffeinspritzpumpe (1 ) heraus verlängerten freien Ende der Einspritzpumpenwelle (9) befestigt. Hierzu sind am freien Ende der Einspritzpumpenwelle (9) ein Aufnahmekonus (86) und in der Nabe (61) des Rotors (59) eine entsprechend angepasste Aufnahmekegelbohrung (87) vorgesehen. Für eine Verdrehungssicherung der Nabe (61) gegenüber der Einspritzpumpenwelle (9) sorgt eine Nut-Feder-Verbindung (88). Befestigt wird der impulserzeugende Rotor (59) in diesem Fall an der Einspritzpumpenwelle (9) durch eine auf einen an dessen freiem Ende angeordneten Gewindezapfen (89) aufgeschraubte Mutter (90) unter Zwischenschaltung einer Beilagscheibe (91). Die restlichen Teile des Drehzahlgebers werden bei diesem Ausführungsbeispiel im bzw. am Drehzahlgeber-Gehäuse (55) vormontiert. Damit der bereits am Ende der Einspritzpumpenwelle (9) befestigte impulserzeugende Rotor (59) bei Anbringung der Grundplatte (11) an der Kraftstoffeinspritzpumpe in das Drehzahlgeber-Gehäuse (55) eintauchen kann, ist in der Grundplatte (11) eine Durchgangsbohrung (92) vorgesehen, deren Durchmesser grösser als der Aussendurchmesser der Scheibe (63) des Rotors (59) ist. Die besagte Durchgangsbohrung (92) dient gleichzeitig auch als Zentrierbohrung zur Lagefixierung der Grundplatte (11) an der Kraftstoffeinspritzpumpe (1), wobei an deren Aussenseite ein entsprechend vorspringender Zentrierbund (93) angeordnet ist. Die Durchgangsbohrung (92) und der Zentrierbund (93) finden auch bei allen anderen Ausführungsbeispielen ihre Anwendung.In the connection variant according to FIG. 5, the pulse-generating rotor (59) of the speed sensor (8) is attached directly to the free end of the injection pump shaft (9) which is extended out of the fuel injection pump (1). For this purpose, a receiving cone (86) is provided at the free end of the injection pump shaft (9) and a correspondingly adapted receiving cone bore (87) is provided in the hub (61) of the rotor (59). A tongue and groove connection (88) ensures that the hub (61) is secured against rotation with respect to the injection pump shaft (9). In this case, the pulse-generating rotor (59) is fastened to the injection pump shaft (9) by a nut (90) screwed onto a threaded pin (89) arranged at its free end with the interposition of a washer (91). The remaining parts of the speed sensor are pre-assembled in or on the speed sensor housing (55). A through hole (92) is provided in the base plate (11) so that the pulse-generating rotor (59) already attached to the end of the injection pump shaft (9) can dip into the speed sensor housing (55) when the base plate (11) is attached to the fuel injection pump whose diameter is larger than the outer diameter of the disc (63) of the rotor (59). Said through bore (92) also serves as a centering bore for fixing the position of the base plate (11) on the fuel injection pump (1), a corresponding projecting centering collar (93) being arranged on the outside thereof. The through hole (92) and the centering collar (93) are also used in all other exemplary embodiments.

Bei der zweiten Anschlussvariante, die in Figur 8 dargestellt ist, ist eine Anordnung für den impulserzeugenden Rotor (59) des Drehzahlgebers (8) gewählt, die eine komplette Vormontage desselben zusammen mit den anderen Teilen des Drehzahlgebers (8) in dessen Gehäuse (55) ermöglicht. Dabei ist der impulserzeugende Rotor (59) mit seiner Nabe (61 ) lose drehbar auf einem Lagerzapfen (94) aufgesetzt, der an der Deckplatte (95) des Drehzahlgeber-Gehäuses (55), an der aussen auch der Gehäusedeckel (56) aufliegt, befestigt ist. Zur Herstellung der Antriebsverbindung mit der Einspritzpumpenwelle (9) sind am freien Ende der letzteren ein Sackloch (96) mit Formschlussquerschnitt und am impulserzeugenden Rotor (59) in Fortsetzung der Nabe (61 ) ein Antriebszapfen (97) vorgesehen, dessen äusseres freies Ende (98) an den Formschlussquerschnitt des Sackloches (96) angepasst ist. Auf dem Antriebszapfen (97) ist ausserdem eine Druckfeder (99) angeordnet. Dieser so vorbereitete Rotor (59) wird von unten her durch die Durchgangsbohrung (92) in der Grundplatte (11) in das Innere des Gehäuses (55) eingeführt und auf den Lagerzapfen (94) aufgesetzt. Auf dem Lagerzapfen selbst ist der Rotor (59) dann an einer dort angeordneten Auflageplatte (100) abgestützt. Danach ist der Drehzahlgeber (8) komplett vormontiert. Um den Rotor (59) in montierter Lage zu halten, ist lediglich ein Hilfsorgan, z.B. eine Abdeckkappe in die Aufnahmebohrung (92) einzusetzen, die den Rotor am Herausfallen hindert und die bei Endmontage der Steuereinrichtung an der Kraftstoffeinspritzpumpe vorher entfernt wird. Nach dieser Endmontage, also der Ankupplung des Rotors (59) an die Einspritzpumpenwelle (9), stützt sich die Druckfeder (99) einenendes an einer Schulter (101) der Nabe (61) und andernendes an der äusseren Stirnfläche (102) der Einspritzpumpenwelle (9) ab und sorgt dann dafür, dass der impulserzeugende Rotor (59) während des Drehzahlgeber-Betriebes mit leichtem Druck gegen die Auflageplatte (100) am Lagerzapfen (94) angedrückt bleibt.In the second connection variant, which is shown in FIG. 8, an arrangement for the pulse-generating rotor (59) of the speed sensor (8) is selected, which completely pre-assembles the same together with the other parts of the speed sensor (8) in its housing (55). enables. The pulse-generating rotor (59) with its hub (61) is loosely rotatably mounted on a bearing journal (94) which rests on the cover plate (95) of the speed sensor housing (55), on which the housing cover (56) also lies on the outside. is attached. To establish the drive connection to the injection pump shaft (9), a blind hole (96) with a positive-locking cross-section is provided at the free end of the latter, and a drive pin (97) is provided on the pulse-generating rotor (59) in continuation of the hub (61), the outer free end (98 ) is adapted to the form-fitting cross section of the blind hole (96). A compression spring (99) is also arranged on the drive pin (97). This rotor (59) prepared in this way is inserted from below through the through hole (92) in the base plate (11) into the interior of the housing (55) and placed on the bearing journal (94). The rotor (59) is then supported on the bearing journal itself on a support plate (100) arranged there. Then the speed sensor (8) is completely pre-assembled. In order to hold the rotor (59) in the assembled position, only an auxiliary element, e.g. insert a cover cap into the receiving bore (92) which prevents the rotor from falling out and which is removed beforehand when the control device is finally mounted on the fuel injection pump. After this final assembly, i.e. the coupling of the rotor (59) to the injection pump shaft (9), the compression spring (99) is supported on one end on a shoulder (101) of the hub (61) and on the other end on the outer end face (102) of the injection pump shaft ( 9) and then ensures that the pulse-generating rotor (59) remains pressed against the support plate (100) on the bearing journal (94) with slight pressure during operation of the speed sensor.

Ausser der Aufnahmebohrung (92) in der Grundplatte (11) und dem Zentrierzapfen (93) an der Kraftstoffeinspritzpumpe (1) sind noch weitere Lagefixierungsmittel vorgesehen, die bei Anbringung der Grundplatte (11) eine lagerichtige Zuordnung desselben in bezug auf die Kraftstoffeinspritzpumpe (1) und deren Teile sicherstellen. Diese weiteren Lagefixierungsmittel sind an einer von jener der vorgenannten entfernten Stelle angeordnet und ähnlich ausgebildet. Dies ist aus Figur 4 ersichtlich; es handelt sich dabei um eine weitere in der Grundplatte (11) vorhandene Zentrierbohrung (103), in die ein an der Kraftstoffeinspritzpumpe (1) gegebener Zentrierzapfen (104) eingreift. Über diese beiden Zentrier- bzw. Lagefixierungsstellen (92, 93) und (103, 104) sind bei Anbringung der Grundplatte (11) alle an dieser vormontierten Teile der Steuereinrichtung in lagerichtige Zuordnung mit den an der Kraftstoffeinspritzpumpe vormontierten Teilen der Steuereinrichtung bringbar. Bei diesen Bauteilen der Steuereinrichtung handelt es sich einerseits um den Drehzahlgeber (8), der je nach Ausgestaltung entsprechend Figur 5 oder 8 in Wirkverbindung mit der Einspritzpumpenwelle (9) zu bringen ist, und des weiteren um die Verbindung des Federkraftspeichers (4) über die Kraftübertragungsstange (7) mit der Regelstange (2). Auch für diesen Fall gibt es mehrere Ausführungsformen, die nachstehend erläutert sind.In addition to the mounting hole (92) in the base plate (11) and the centering pin (93) on the fuel injection pump (1), further position fixing means are provided which, when the base plate (11) is attached, ensure that it is correctly positioned with respect to the fuel injection pump (1). and ensure their parts. These further position-fixing means are arranged at a location remote from that of the aforementioned and are of a similar design. This can be seen from Figure 4; it is a further centering hole (103) in the base plate (11) into which a centering pin (104) on the fuel injection pump (1) engages. Via these two centering or position fixing points (92, 93) and (103, 104), when the base plate (11) is attached, all parts of the control device preassembled on it can be brought into the correct position with the parts of the control device preassembled on the fuel injection pump. These components of the control device are, on the one hand, the speed sensor (8), which, depending on the configuration according to FIG. 5 or 8, is to be brought into active connection with the injection pump shaft (9), and furthermore the connection of the spring force accumulator (4) via the Power transmission rod (7) with the control rod (2). In this case, too, there are several embodiments which are explained below.

In den Figuren 2, 6, 7 und 9 ist eine erste Ausführungsform für die Verbindung des Federkraftspeichers (4) über die Kraftübertragungsstange (7) mit der Regelstange (2) gezeigt. Dabei handelt es sich um eine Anschlussvariante in Verbindung mit einer im Querschnitt L-förmigen Regelstange (2), die ein gewisses Mass über die Aussenkontur der Kraftstoffeinspritzpumpe (1) hinaus verlängert ist und im Bereich ihres äusseren freien Endes sowohl die Kraftübertragungsstange (7) als auch die Rückstelldruckfeder (5) aufnimmt. Die diesbezügliche Montagefolge ist aus Figur 9 ersichtlich. Dabei wird zunächst auf das äussere freie Ende der in Nullfüllungsstellung befindlichen Regelstange (2) die Rückstelldruckfeder (5) aufgesteckt, dann diese vorgespannt und mittels eines Widerlagers in dem gespannten Zustand gehalten. Dieses Widerlager besteht, wie in Einzelheiten gut aus Figur 7 ersichtlich, aus einem Anschlussklotz (105) und einem daran starr befestigten Druckteller (106), dessen Aussendurchmesser geringfügig kleiner als die Aufnahmebohrung (31) für den Federkraftspeicher (4) ist. Der Anschlussklotz (105) besitzt zwei rechtwinklig zueinander stehende Anlagekanten, mit denen er im Winkel der L-förmigen Regelstange (2) an deren Schenkeln zur Anlage kommt. Befestigt it der Anschlussklotz (105) an der Regelstange (2) mittels einer Schraube (107), die mit ihrem Schraubenkopf (108) an der Aussenseite des senkrechten Schenkels der Regelstange (2) gekontert ist, mit ihrem Schraubenschaft (109) eine Querbohrung (110) in der Regelstange (2) durchdringt und in eine hierzu fluchtende Gewindebohrung (111) im Anschlussklotz (105) eingreift und diesen in Anbaulage an die Innenseite des senkrechten Schenkels der Regelstange (2) anpresst. Die Schraube (107) ist durch ein Sicherungsblech (112) gegen Lösen gesichert, und zwar durch einen hochgebogenen Lappen (113) desselben, der sich an eine Aussenfläche des Schraubenkopfes (108) anlegt. Nach dieser Befestigung des Drucktellers (106) über den Anschlussklotz (105) ist die Rückstelldruckfeder (5) in vorgespannter Form zwischen einer Anlagefläche (114) an der Kraftstoffeinspritzpumpe (1) und dem Druckteller (106) fixiert. Unmittelbar vor dem Anschlussklotz ist die Kraftübertragungsstange (7) an der Regelstange (2) befestigt, und zwar mittels eines an ihr endseitig angeordneten Anschlussstückes (115), das querschnittsmässig an die L-Form der Regelstange (2) angepasst ist. Wie im einzelnen aus Figur 6 ersichtlich, ist die Kraftübertragungsstange (7) mittels einer Schraube (116) befestigt, die mit ihrem Lagerschaft (117) eine durchgehende Lagerbohrung (118) im senkrechten Schenkel der Regelstange (2) durchdringt und mit dessen Stirnfläche an der Aussenseite des Anschlussstückes (115) abgestützt sowie mit ihrem Gewindeschaft (119) in eine dort quer durchgehende Gewindebohrung (120) eingeschraubt ist und mit ihrem Schraubenkopf (121) die Regelstange (2) mit gewissem axialem Spiel in Anbaulage hält. Die Schraube (116) ist ebenfalls durch einen sich aussen an einem der am Schraubenkopf (121) gegebenen Flächen anlegenden Lappen (122) des Sicherungsbleches (112) gegen Lösen gesichert.FIGS. 2, 6, 7 and 9 show a first embodiment for the connection of the spring force accumulator (4) via the force transmission rod (7) to the control rod (2). This is a connection variant in connection with a control rod (2) with an L-shaped cross-section, which has a certain dimension over the outer contour the fuel injection pump (1) is extended and receives both the power transmission rod (7) and the return pressure spring (5) in the area of its outer free end. The relevant assembly sequence is shown in Figure 9. The return pressure spring (5) is first plugged onto the outer free end of the control rod (2) in the zero filling position, then preloaded and held in the tensioned state by means of an abutment. This abutment, as can be seen in detail in FIG. 7, consists of a connecting block (105) and a pressure plate (106) rigidly attached to it, the outside diameter of which is slightly smaller than the receiving bore (31) for the spring force accumulator (4). The connecting block (105) has two contact edges at right angles to each other, with which it comes to rest against the legs of the L-shaped control rod (2). Attaches the connecting block (105) to the control rod (2) by means of a screw (107), which is countered with its screw head (108) on the outside of the vertical leg of the control rod (2), with a screw hole (109) in a cross hole ( 110) penetrates in the control rod (2) and engages in an aligned threaded hole (111) in the connecting block (105) and presses it into the installed position on the inside of the vertical leg of the control rod (2). The screw (107) is secured against loosening by means of a locking plate (112), namely by means of a bent-up tab (113) which bears against an outer surface of the screw head (108). After this attachment of the pressure plate (106) via the connecting block (105), the return pressure spring (5) is fixed in a prestressed form between a contact surface (114) on the fuel injection pump (1) and the pressure plate (106). Immediately in front of the connecting block, the force transmission rod (7) is fastened to the control rod (2), specifically by means of a connecting piece (115) arranged at its end, which is cross-sectionally adapted to the L-shape of the control rod (2). As can be seen in detail from Figure 6, the power transmission rod (7) is fastened by means of a screw (116), which with its bearing shaft (117) penetrates a continuous bearing bore (118) in the vertical leg of the control rod (2) and with its end face on the Supported on the outside of the connecting piece (115) and screwed with its threaded shaft (119) into a threaded bore (120) running through there and with its screw head (121) holds the control rod (2) in the mounting position with a certain amount of axial play. The screw (116) is also secured against loosening by a tab (122) of the locking plate (112) which bears against the outside of one of the surfaces provided on the screw head (121).

Die Rückstelldruckfeder (5), deren Widerlager (105, 106) und die Kraftübertragungsstange (2) bilden bei diesem Ausführungsbeispiel mithin eine am äusseren freien Ende der Regelstange (2) zu montierende Teilbaugruppe. Die übrigen Teile der Steuereinrichtung sind des weiteren insgesamt im bzw. am Gehäuse (24) und an der Grundplatte (11) vorzumontieren, wobei im Fall des Drehzahlgebers (8) entweder so wie nach Figur 5 oder so wie nach Figur 8 vorgegangen werden kann. Bei Anbringung der Grundplatte (11) an der Kraftstoffeinspritzpumpe (1 ) taucht dann die an der Regelstange (2) vormontierte Kraftübertragungsstange (7) in die Aufnahmebohrung (31) ein und durchdringt dann auch den Federkraftspeicher (4) der Länge nach vollständig. Nach Befestigung der Grundplatte (11 ) an der Kraftstoffeinspritzpumpe (1) wird zuletzt noch der Federkraftspeicher (4) an der Kraftübertragungsstange (7) fixiert, wobei dieser mit seinem Druckteller (14) am Anschlag (22) zur Anlage gebracht und dann der äussere Anschlag in Form des Sicherungsringes (21 ) in seine Aufnahmenut (21/1) eingesetzt wird. Zuletzt wird noch die Aufnahmebohrung (31 ) durch den Verschlussstopfen (54) verschlossen und dessen Lage durch den einzusetzenden Sicherungsring (53) festgelegt.In this exemplary embodiment, the return pressure spring (5), its abutment (105, 106) and the force transmission rod (2) therefore form a subassembly to be mounted on the outer free end of the control rod (2). The remaining parts of the control device are further to be preassembled in or on the housing (24) and on the base plate (11), in the case of the speed sensor (8) either as shown in FIG. 5 or as shown in FIG. 8. When the base plate (11) is attached to the fuel injection pump (1), the power transmission rod (7) preassembled on the control rod (2) plunges into the receiving bore (31) and then completely penetrates the spring force accumulator (4) along its length. After attaching the base plate (11) to the fuel injection pump (1), the spring force accumulator (4) is finally fixed to the force transmission rod (7), bringing it into contact with its pressure plate (14) at the stop (22) and then the outer stop in the form of the locking ring (21) is inserted into its receiving groove (21/1). Finally, the receiving bore (31) is closed by the sealing plug (54) and its position is determined by the locking ring (53) to be inserted.

Eine Alternative zu der vorstehend geschilderten Ausführungsform ist in Figuren 10, 11 und 12 gezeigt, wobei eine spezielle Kupplung zwischen Regelstange (2) und Kraftübertragungsstange (7) zur Anwendung kommt, die alternative Vormontagemethoden ermöglicht. Generell ist dabei von den beiden an der Kraftübertragungsstange (7) zur beidseitigen Erfassung des Federkraftspeichers (4) dienenden Anschlägen (21, 22) wenigstens der von der Kraftstoffeinspritzpumpe (1) weiter entferntere abnehmbar und insbesondere durch einen in eine Nut (21/1) einsetzbaren Sicherungsring (21) gebildet. An der Kraftübertragungsstange (7) ist des weiteren räumlich beabstandet vom anderen, der Kraftstoffeinspritzpumpe näheren Anschlag (22) eine ein Widerlager für die Rückstelldruckfeder (5) bildende Druckplatte (123) und davor endseitig das eine Teil einer Steckkupplung angeordnet. Das andere Teil dieser Steckkupplung dagegen ist am freien Ende der Regelstange (2) angeordnet. Das eine Teil der Steckkupplung ist durch eine Steckmuffe (124) gebildet, die in dem dargestellten Ausführungsbeispiel im Anschluss an die Druckplatte (123) am äusseren Ende der Kraftübertragungsstange (7) angeordnet ist. Diese Steckmuffe (124) besitzt eine durch Längsschlitze (siehe Figur 12) in Einzellamellen (126) aufgeteilte und elastisch gemachte Muffenumfangswand. An der Stirnseite der Steckmuffe (124) sind deren Einzellamellen (126) jeweils mit einwärts verdickten Greifbacken (127) versehen. Der andere Teil der Steckkupplung, der im vorliegenden Fall am äusseren freien Ende der entsprechend ausgebildeten bzw. mit einem entsprechend ausgebildeten und befestigten Ansatzstück versehenen Regelstange (2) angeordnet ist, ist durch einen Steckkopf (128) gebildet. Dieser Steckkopf (128) weist frontseitig und rückseitig je einen durch eine Anfasung gebildeten Muffenaufweitkegel (138/1,138/2) auf und ist an einem Spannhals (129) angeordnet, der sich koaxial an einer ebenen Stirnfläche (130) eines zylindrischen Abschnittes (131) der Regelstange (2) anschliesst. Dem Steckkopf (128) ist eine Sicherungshülse (132) zugeordnet, die auf dem zylindrischen Abschnitt (131) der Regelstange (2) axial entgegen der Kraft einer rückseitig angreifenden und an einer Konterfläche (133) abgestützten Druckfeder (134) verschiebbar ist und am zylindrischen Abschnitt (131) gegen Herausfallen durch einen Sicherungsstift (135) gesichert ist. Letzterer durchdringt den zylindrischen Abschnitt (131) quer und ragt in wenigstens eine Längsnut (136) der Sicherungshülse (132) hinein. In vorderster Stellung, die der Sicherungslage entspricht, überdeckt die Sicherungshülse (132) den Spannhals (129) und wenigstens die Hälfte des Steckkopfes (128) in axialer Richtung. Der Aussendurchmesser des Steckkopfes (128) ist geringfügig kleiner als der Innendurchmesser der Steckmuffe (124).An alternative to the embodiment described above is shown in FIGS. 10, 11 and 12, a special coupling between control rod (2) and power transmission rod (7) being used, which enables alternative preassembly methods. In general, at least one of the two stops (21, 22) on the force transmission rod (7) for detecting the spring force accumulator (4), which is further away from the fuel injection pump (1), can be removed and in particular by a groove (21/1) insertable circlip (21) formed. On the power transmission rod (7) there is also a spacing apart from the other stop (22) closer to the fuel injection pump, a pressure plate (123) forming an abutment for the return pressure spring (5) and in front of it the one part of a plug-in coupling. The other part of this plug-in coupling, however, is arranged at the free end of the control rod (2). One part of the plug-in coupling is formed by a plug-in sleeve (124) which, in the exemplary embodiment shown, is arranged after the pressure plate (123) at the outer end of the force transmission rod (7). This plug-in sleeve (124) has a sleeve circumferential wall which is divided into longitudinal lamellae (126) and made elastic by longitudinal slots (see FIG. 12). On the end face of the push-in sleeve (124), the individual lamellae (126) are each provided with gripping jaws (127) which are thickened inwards. The other part of the plug-in coupling, which in the present case is arranged at the outer free end of the control rod (2) which is designed accordingly or provided with a correspondingly designed and fastened extension piece, is formed by a plug-in head (128). This plug head (128) has a socket widening cone (138 / 1,138 / 2) formed by a chamfer on the front and rear and is arranged on a clamping neck (129) which is coaxial with a flat end face (130) of a cylindrical section (131) the control rod (2) closes. The plug-in head (128) is assigned a securing sleeve (132) which can be displaced axially on the cylindrical section (131) of the control rod (2) against the force of a pressure spring (134) acting on the rear and supported on a counter surface (133) and on the cylindrical one Section (131) is secured against falling out by a locking pin (135). The latter penetrates the cylindrical section (131) transversely and projects into at least one longitudinal groove (136) of the securing sleeve (132). In the foremost position, which corresponds to the securing position, the securing sleeve (132) covers the clamping neck (129) and at least half of the plug head (128) in the axial direction. The outside diameter of the plug head (128) is slightly smaller than the inside diameter of the plug sleeve (124).

An den Querschnittsbereich zwischen Stirnfläche (130), Spannhals (129), Steckkopf (128) und Durchgangsbohrung (137) der Sicherungshülse (132) ist die Wandstärke der in Einzellamellen (126) aufgeteilten Muffenumfangswand und der verdickten Greifbacken (127) so angepasst, dass im gekuppelten Zustand praktisch kein bzw. nur mehr ein geringfügiges axiales Spiel möglich ist.The wall thickness of the circumferential sleeve wall divided into individual lamellae (126) and the thickened gripping jaws (127) is adapted to the cross-sectional area between the end face (130), clamping neck (129), plug-in head (128) and through hole (137) of the securing sleeve (132) so that practically no or only a slight axial play is possible in the coupled state.

Die vorstehend beschriebene Steckkupplung erlaubtzwei mögliche Vormontagemethoden, von denen die eine in Figur 10 und die andre in Figur 11 dargestellt ist. Bei der in Figur 10 dargestellten Montagemethode wird zunächst auf den bereits mit der Druckfeder (134) und der Sicherungshülse (132) bestückten zylindrischen Abschnitt (131) an der Regelstange (2) die Rückstelldruckfeder (5) aufgeschoben. Danach wird die Kraftübertragungsstange (7) mit ihrer frontseitigen Steckmuffe (124) an den Steckkopf (128) angesetzt. Bei axialer Aufschiebung auf den Steckkopf (120) wird zunächst die Steckmuffe (124) durch den Muffenaufweitkegel (138/1 ) aufgeweitet, so dass dann bei weiterer axialer Verschiebung von der aufgeweiteten Steckmuffe (124) die Sicherungshülse (132) axial entgegen der Kraft der Druckfeder (134) verschoben und gleichzeitig die Rückstelldruckfeder (5) bei in Nullfüllungsstellung gehaltener Regelstange (2) gespannt wird. Diese axiale Verschiebung geschieht so weit, bis die Steckmuffe (124) mit ihrer Stirnfläche an der Stirnfläche (130) des zylindrischen Abschnittes (130) anstösst und die Greifbacken (127) in den Bereich des Spannhalses (129) einrasten. Dabei nimmt die Steckmuffe (124) aussen wieder ihren zylindrischen Zustand ein, so dass die Sicherungshülse (132) durch die Kraft der sich entspannenden Druckfeder (134) wieder in ihre Sicherungsposition zurückgeschoben wird, in der dann ein Aufweiten der Steckmuffe (124) weit ringsum übergriffen, wirksam verhindert und gleichzeitig die Rückstelldruckfeder (5) dann zwischen Druckplatte (123) und Anlagefläche (114) an der Kraftstoffeinspritzpumpe (1) eingespannt ist. Die Druckfeder (5) und diese speziell ausgebildete Kraftübertragungsstange (7) bilden somit eine vormontierbare Teilbaugruppe der Steuereinrichtung. Die übrigen Bauteile der Steuereinrichtung sind im bzw. am Gehäuse (24) und an der Grundplatte (11) vormontiert und bilden zusammen mit letzterer eine ebenfalls vormontierbare Baugruppe. Im Bereich des Drehzahlgebers kann diese Vormontage auch in diesem Fall so wie in Figur 5, oder so wie in Figur 8 dargestellt, durchgeführt sein. Bei Anbringung der so bestückten Grundplatte (11) an die Kraftstoffeinspritzpumpe (1) taucht zunächst die an der Regelstange (2) vormontierte Kraftübertragungsstange (7) in die Aufnahmebohrung (31) des Gehäuses (24) ein und durchdringt dann auch noch den dort bereits montierten Federkraftspeicher (4) der Länge nach vollständig. Sobald die Grundplatte (11) an der Kraftstoffeinspritzpumpe (1) befestigt ist, wird der Federkraftspeicher (4), sofern noch nicht geschehen, am Anschlag (22) der Kraftübertragungsstange (7) zur Anlage gebracht und dann durch Einsetzen des Sicherungsringes (21) in die zugehörige Nut (21/1) mit der Kraftübertragungsstange (7) in Wirkverbindung gebracht. Zuletzt wird dann auch in diesem Fall die Aufnahmebohrung (31) noch durch den Verschlussstopfen (54) verschlossen und letzterer durch den einzusetzenden Sicherungsring (53) in Verschlusslage gehalten.The plug coupling described above allows two possible pre-assembly methods, one of which is shown in Figure 10 and the other in Figure 11. In the assembly method shown in FIG. 10, the return pressure spring (5) is first pushed onto the cylindrical section (131) on the control rod (2) that is already equipped with the compression spring (134) and the securing sleeve (132). The force transmission rod (7) is then attached to the plug head (128) with its plug sleeve (124) on the front. When axially pushed onto the plug head (120), the plug sleeve (124) is first widened by the sleeve expanding cone (138/1), so that when the plug sleeve (124) is expanded further axially, the securing sleeve (132) is axially counter to the force of the Compression spring (134) is displaced and at the same time the return compression spring (5) is tensioned with the control rod (2) held in the zero filling position. This axial displacement occurs until the end of the push-in sleeve (124) abuts the end face (130) of the cylindrical section (130) and the gripping jaws (127) snap into the area of the clamping neck (129). The plug-in sleeve (124) returns to its cylindrical state on the outside, so that the locking sleeve (132) is pushed back into its locking position by the force of the relaxing compression spring (134), in which the plug-in sleeve (124) then widens all around overlapped, effectively prevented and at the same time the return pressure spring (5) is then clamped between the pressure plate (123) and the contact surface (114) on the fuel injection pump (1). The compression spring (5) and this specially designed power transmission rod (7) thus form a preassembled subassembly of the control device. The remaining components of the control device are preassembled in or on the housing (24) and on the base plate (11) and, together with the latter, form a subassembly which can also be preassembled. In the area of the speed sensor, this pre-assembly can also be carried out in this case as shown in FIG. 5 or as shown in FIG. When the base plate (11) equipped in this way is attached to the fuel injection pump (1), the power transmission rod (7) preassembled on the control rod (2) first dips into the receiving bore (31) of the housing (24) and then also penetrates the one already installed there Spring force accumulator (4) completely along its length. As soon as the base plate (11) is attached to the fuel injection pump (1), the spring force accumulator (4), if not yet done, is brought into contact with the stop (22) of the force transmission rod (7) and then by inserting the locking ring (21) the associated groove (21/1) is operatively connected to the power transmission rod (7). Finally, in this case too, the receiving bore (31) is still closed by the sealing plug (54) and the latter is held in the closed position by the locking ring (53) to be inserted.

Alternativ zu der vorstehend beschriebenen Montagemethode lässt das Vorsehen der besagten Steckkupplung, so, wie vorstehend dargelegt, auch eine andere Montagevariante zu, die nachstehend anhand von Figur 11 beschrieben ist. In diesem Fall ist die erfindungsgemässe Steuereinrichtung insgesamt vormontierbar, d.h. alle ihre Teile sind im bzw. am Gehäuse (24) bzw. an der Grundplatte (11) ein- bzw. angebaut. In diesem Fall wäre der Drehzahlgeber (8), so, wie in Figur 8 dargestellt, komplett vorzumontieren und dessen impulserzeugender Rotor (59) gegen Herausfallen aus dem Drehzahlgebergehäuse (55) durch eine entsprechende, in die Durchgangsbohrung (92) der Grundplatte eingesetzte Abdeckkappe zu sichern. Die Kraftübertragungsstange (7) ist, wie aus Figur 11 ersichtlich, bereits mit dem Federkraftspeicher (4) verbunden. Ausserdem ist die Aufnahmebohrung (31) des Gehäuses (24) einenendes schon durch den Verschlussstopfen (54) verschlossen, der durch den Sicherungsring (53) in Verschlusslage gehalten wird. Der Verschlussstopfen (54) bildet in diesem Fall den Anschlag für die Nullfüllungsstellung der Kraftübertragungsstange (7) und damit auch der Regelstange (2). In die Aufnahmebohrung (31) des Gehäuses (24) ist ausserdem im Anschluss an die Druckplatte (123) schon die Rückstelldruckfeder (5) in entspannter Form eingesetzt. Damit diese in vormontierter Lage gehalten bleibt, ist die Aufnahmebohrung (131 ) endseitig durch eine später abnehmbare Verschlusskappe (139) verschlossen. Bei Anbringung der insgesamt vormontierten Steuereinrichtung werden zunächst die besagten Verschlusskappen abgenommen und dann die Grundplatte (11) an die Kraftstoffeinspritzpumpe (1) herangeführt. Dabei taucht der schon mit der Druckfeder (134) und der Sicherungshülse (132) bestückte zylindrische Abschnitt (131) der in Nullfüllungsstellung befindlichen Regelstange (2) in den Innenraum der Aufnahmebohrung (31 ) ein und kommt dann mit dem Steckkopf (128) in Steckkontakt mit der Steckmuffe (124). Bei weiterem axialen Verschieben wird dann durch den Muffenaufweitkegel (138/1) die Steckmuffe (124) eingangs aufgeweitet, dann durch diese die Sicherungshülse (132) axial verschoben und gleichzeitig die Rückstelldruckfeder (5) gespannt. Sobald die Steckmuffe (124) an der Stirnfläche (130) des zylindrischen Abschnittes (131 ) der Regelstange (2) zur Anlage kommt, können die Greifbacken (127) in den Bereich des Spannhalses einrasten. Danach rückt die Sicherungshülse (132) unter Entspannung der Druckfeder (134) wieder in ihre Sicherungsposition vor, in der dann ein ungewolltes Lösen der Kupplungsverbindung nicht mehr möglich ist. Wenn diese Kupplungsverbindung vollständig eingenommen ist, dann liegt auch die Grundplatte (11) vollständig an der Kraftstoffeinspritzpumpe (1) an und kann an dieser dann endgültig befestigt werden.As an alternative to the assembly method described above, the provision of said plug-in coupling, as set out above, also permits another assembly variant, which is described below with reference to FIG. 11. In this case, the control device according to the invention can be preassembled overall, ie all of its parts are installed in or on the housing (24) or on the base plate (11). In this case, the speed sensor (8), as shown in Figure 8, would be completely pre-assembled and its pulse-generating rotor (59) against falling out of the speed sensor housing (55) by a corresponding cover cap inserted into the through hole (92) of the base plate to back up. As can be seen from FIG. 11, the force transmission rod (7) is already connected to the spring force accumulator (4). In addition, the receiving bore (31) of the housing (24) is already closed at one end by the plug (54), which is held in the closed position by the locking ring (53). In this case, the sealing plug (54) forms the stop for the zero filling position of the power transmission rod (7) and thus also the control rod (2). In addition, the return pressure spring (5) is inserted into the receiving bore (31) of the housing (24) following the pressure plate (123) in a relaxed form. So that it remains in the pre-assembled position, the receiving bore (131) is closed at the end by a cap (139) which can be removed later. When the overall preassembled control device is attached, the said sealing caps are first removed and then the base plate (11) is brought up to the fuel injection pump (1). The cylindrical section (131) of the control rod (2) in the zero-filling position, which is already equipped with the compression spring (134) and the securing sleeve (132), is immersed in the interior of the receiving bore (31) and then comes with the plug head (128) in plug contact with the plug sleeve (124). With further axial displacement, the push-in sleeve (124) is then widened at the beginning by the sleeve expansion cone (138/1), then the locking sleeve (132) is axially displaced and the return pressure spring (5) is tensioned at the same time. As soon as the push-in sleeve (124) comes to rest on the end face (130) of the cylindrical section (131) of the control rod (2), the gripping jaws (127) can snap into the area of the clamping neck. Then the securing sleeve (132) advances back into its securing position, releasing the compression spring (134), in which an unwanted release of the coupling connection is then no longer possible. When this coupling connection has been fully taken up, then the base plate (11) also lies completely against the fuel injection pump (1) and can then be finally attached to it.

Aufgrund der erfindungsgemässen Ausgestaltung ist somit generell eine sehr kompakte Steuereinrichtung geschaffen, deren Teile alle in einer Baugruppe komplett oder in zwei bzw. drei Teilbaugruppen vormontierbar sind. Aber auch für den Fall, dass die Vormontage auf zwei oder drei Teilbaugruppen aufgeteilt ist, ist in jedem Fall eine besonders einfache Handhabung bei schneller Montage gewährleistet. Letzteres bedeutet, dass die Endmontage der Steuereinrichtung an der Kraftstoffeinspritzpumpe mit wenigen Handgriffen und mit automatischer lagerichtiger Zuordnung der miteinander zu koppelnden Teile erfolgen kann. Darüber hinaus sind alle Einzelteile der Steuereinrichtung, z.B. im Fall eines Defektes jederzeit auch einzeln für sich ohne Schwierigkeiten mit wenigen Handgriffen auszutauschen.Because of the design according to the invention, a very compact control device is thus generally created, the parts of which can all be preassembled in one assembly or in two or three sub-assemblies. But even in the event that the pre-assembly is divided into two or three sub-assemblies, particularly easy handling with quick assembly is guaranteed in any case. The latter means that the final assembly of the control device on the fuel injection pump can be carried out in a few simple steps and with the parts to be coupled being automatically assigned in the correct position. In addition, all individual parts of the control device, e.g. In the event of a defect, it can be replaced individually at any time with little effort.

Claims (16)

1. A device for controlling the adjustment of the injection point of time and/or the feed quantity of a fuel injection pump (1) for internal combustion engines, in which device adjustment commands given by a microprocessor can be transmitted by an electric stepping motor (3) via movement transmission members (6, 7) with an interposed spring-energy store (4) to a regulating rod (2), and a return pressure spring (5) is provided for returning the regulating rod (2) into its zero feed position, the spring-energy store (4) having two cup springs (13, 14) movable against each other and accommodating between them a prestressed pressure spring (12) the maximum distance between the cup springs being bounded by stops (15, 16) in a housing (17) and held thereby; and where on the one hand the stepping motor (3) and on the other hand the regulating rod (2) are in connection with the spring-energy store (4), in each case with the interposition of a movement transmission member (6 or 7 respectively), and the movement transmission member on the side nearest the regulating rod is a force transmission rod (7) which penetrates both cup springs (13, 14) and has stops (21, 22) acting together with the sides of the cup springs facing away from the pressure spring of the spring-energy store, characterised in that
a housing (55) of a mechanical rpm emitter (8) giving its signals to the microprocessor, and, separate therefrom, a housing (24) accommodating the movement transmission member (6) on the side nearest the stepping motor, the spring-energy store (4), the force transmission rod (7) and the return pressure spring (5), are firmly arranged on a base plate (11); in that the stepping motor (3) and a step emitter (10) recording its steps, each having its own housing (25 and 33 respectively), are flanged to opposite sides of this housing (24); in that the stepping motor (3), the movement transmission member (6) on the side nearest the stepping motor, the spring-energy store (4), the force transmission rod (7) and the return pressure spring (5) form a ready installed assembly on the base plate (11); and in that the base plate (11 ) can be flanged on to the fuel injection pump (1) via centring means (92, 93; 103, 104), at the same time creating the work connections in the right position, on the one hand between the force transmission rod (7) and the regulating rod (2), and on the other hand between the injection pump shaft (9) and the rpm emitter (8), the rotating part (59) of the rpm emitter (8) having been previously built either on to the injection pump shaft (9) or into the housing (55) of the rpm emitter (8).
2. A device for controlling the adjustment of the injection point of time and/or the feed quantity of a fuel injection pump (1) for internal combustion engines, in which device adjustment commands given by a microprocessor can be transmitted by an electric stepping motor (3) via movement transmission members (6, 7) with an interposed spring-energy store (4) to a regulating rod (2), and a return pressure spring (5) is provided for returning the regulating rod (2) into its zero filling position, the spring-energy store (4) having two cup springs (13, 14) movable against each other and accommodating between them a prestressed pressure spring (12) and whose maximum distance from each other is bounded by stops (15, 16) in a housing (17) and held thereby; and where on the one hand the stepping motor (3) and on the other hand the regulating rod (2) are in connection with the spring-energy store (4), in each case with the interposition of a movement transmission member (6 or 7 respectively), and the movement transmission member on the side nearest the regulating rod is a force transmission rod (7) which penetrates both cup springs (13,14) and has stops (21, 22) acting together with the sides of the cup springs facing away from the pressure spring of the spring-energy store, characterised in that a housing (55) of a mechanical rpm emitter (8) giving its signals to the microprocessor, and, separate therefrom, a housing (24) accommodating the movement transmission member (6) on the side nearest the stepping motor, and the spring-energy store (4), are firmly arranged on a base plate (11); in that the stepping motor (3) and a step emitter (10) recording its steps, each having its own housing (25 and 33 respectively), are flanged to opposite sides of this housing (24); in that the stepping motor (3), the movement transmission member (6) nearest the stepping motor, and the spring-energy store (4), form a pre-installed assembly on the base plate (11), while the force transmission rod (7) and the prestressed return pressure spring (5) form a further pre-installed assembly at the projecting end of the regulating rod on the fuel injection pump (1), and in that the base plate (11) can be flanged to the fuel injection pump (1) via centring means (92, 93; 103,104), at the same time creating the work connections in the right position on the one hand between the force transmission rod (7) and the spring-energy store (4), on the other hand between the injection pump shaft (9) and the rpm emitter (8), the rotating part (59) of the rpm emitter (8) having been previously built either on to the injection pump shaft (9) or into the housing (55) of the rpm emitter (8).
. 3. A controlling device according to Claims 1 and 2, characterised in that the stepping motor (3) with its housing (25) on the outer surface of the one side wall (26) and the step emitter (10) with its housing (33) on the outside of the opposite side wall (34) of the said mutual housing (24) are in each case indirectly position-fixed and detachably secured by means of screws (27 and 35).
4. A controlling device according to Claims 1 and 2, characterised by the provision, in the mutual housing (24), of a receiving borehole (31) in which the spring-energy store (4) with its housing (17) is displaceably accommodated axially in the direction of the regulating rod (2), by which are also accommodated the return pressure spring (5) and an abutment (105, 106; 123) therefor, the force transmission rod (7) and the end of the regulating rod (2) projecting from the fuel injection pump (1).
5. A controlling device according to Claims 1 and 2, characterised by the provision, in the mutual housing (24), of a receiving space (30) for accommodating a cogwheel reduction gear (6) which, as a movement transmission member on the side nearestthe stepping motor, is in connection on the one hand with the stepping motor (3) and on the other hand with a linear toothing (23) arranged on the housing (17) of the spring-energy store (4).
6. A controlling device according to Claim 5, characterised in that the receiving space (30) for the cogwheel reduction gear (6) in the housing (24) is open towards the step emitter housing (33) but in the built-on position of the latter is covered by its floor (32).
7. A controlling device according to Claim 6, characterised in that the motor shaft (39) of the stepping motor (3) projects into the receiving space (30) for the cogwheel reduction gear (6) and is coupled via a groove-spring combination (40) with a coaxially arranged input shaft (41) of the cogwheel reduction gear (6) and is partly held therein, which input shaft (41 ) at its end is guided through a borehole (42) of the side wall (26) of the housing (24), penetrates lengthwise the receiving space (30), is extended into the housing (33) of the step emitter (10) and is mounted in the floor (32) of the step emitter housing (33) in a bearing (44), and further carries, on this side of the bearing (44), a first cogwheel (45) of the cogwheel reduction gear (6) and, beyond the bearing (44), a rotor (46) acting within the step emitter housing (33) and producing impulses, as a part of the step emitter (10).
8. A controlling device according to Claim 7, characterised in that the cogwheel reduction gear (6) consists of a total of three cogwheels, namely a first cogwheel (45) seated on the input shaft (41), a second cogwheel (47) meshing with the latter and larger in diameter and/or number of teeth, and a third cogwheel (48), smaller in diameter and/or number of teeth than the second and first, and engaging into the lineartoothing (23) on the spring-energy store housing (17), which third cogwheel, like the second, is secured firmly to a take-off shaft (49) arranged axially parallel to the input shaft (41), one end of which take-off shaft is mounted in the side wall (26) (of the mutual housing (24)) allotted to the stepping motor (3) and the other end in the floor (32) of the step emitter housing (33); and in that the spring-energy store housing (17) is arranged, in a plane vertical to the two shafts (41, 49) of the cogwheel reduction gear (6), in the receiving borehole (31) of the mutual housing (24) so as to be axially displaceable.
9. A controlling device according to Claim 8, characterised in that the receiving borehole (31 ) bearing the spring-energy housing (17) penetrates into the receiving space (30) for the cogwheel reduction gear (6) in order to create a work connection with the third cogwheel (48) of the same, and completely penetrates lengthwise the mutual housing (24), and one end of this borehole is equipped with a securing ring (52) (which gives the zero feed position with its inner side) and with a closing plug (54), and at the other end, also penetrating the base plate (11), the borehole receives the end of the regulating rod (2) projecting out of the fuel injection pump (1) and the means for connecting the regulating rod with the force transmission rod (7), and the abutment (105,106; 123) for the return pressure spring (5).
10. A controlling device according to Claims 1 and 2, characterised by the provision, on the base plate (11) and the fuel injection pump (1), of a plurality of interlocking means (92, 93; 103, 104) spaced from each other which, when the base plate (11) is applied, ensure that the arrangement of the base plate and of the parts mounted thereon is in the correct position and secured against twisting, in relation to the fuel injection pump (1) and the parts in that place; and in that the base plate (11) can be secured to the fuel injection pump (1) by means of screws (57, 58).
11. A controlling device according to Claims 1 and 2, characterised in that the end of the injection pump shaft (9) facing the base plate (11) is constructed for the interlocking attachment, in accordance with the drive, of the impulse-producing rotor (59) of the rpm emitter (8).
12. A controlling device according to Claims 1 and 2, characterised in that the signal-producing members of the step emitter (10) and of the rpm emitter (8) consist in principle of the same components.
13. A controlling device according to Claim 12, characterised in that the signal-producing members are formed (a) from a round disc (62, 63 respectively) attached via a hub (60, 61 respectively) to the respective shaft (9, 41 respectively) which effects the drive, on the periphery of which discs are arranged, axially projecting and extending at equal intervals along a coaxial circle path, identically constructed impulse-producing members (64, 65 respectively); (b) by magnetic fork barriers (66; 67 or 68 respectively) which are stationarily arranged by means of plates (69; 70 or 75 respectively) on the respective housing cover (56 or 76) so that they project axially on the inside and form a magnetic field and produce a sound impulse when one of the impulse-producing members (64 or 65) passes through, this sound impulse being representative of a turning angle of the injection pump shaft (9) and/or a turning step of the stepping motor (3).
14. A controlling device according to Claim 2, characterised by the provision at the end of the force transmission rod (7) of an attachment piece (115) which is appropriately adapted to the shape of the end of the regulating rod and is secured thereto by means of a screw (116); in that, rearwardly of the attachment piece (115), an attachment block (105) is secured to the regulating rod (2) by means of a screw (107), which block carries a pressure plate (106) between which and an outer wall section (14) of the fuel injection pump (1) the prestressed return pressure spring (5) extends; in that, on the force transmission rod (7), at least the stop next to the outer free end, for the spring-energy store (4), can be removed and in particular is formed by a securing ring (21) which, when the base plate (11) is applied to the fuel injection pump (1) after complete penetration of the spring-energy store (4) by the force transmission rod (7), can be inserted into a groove (21/1) on the latter in order to create the work connection (Figs. 6, 7, 9).
15. A controlling device according to Claim 1 or 2, characterised in that, of the two stops (21, 22) serving, on the force transmission rod (7), to hold both ends of the spring-energy store (4), at least the one further from the fuel injection pump (1) can be removed and in particular is formed by a securing ring (21) which can be inserted into an annular groove (21 /1); in that, on the force transmission rod (7), at a further distance from the other stop (22), a pressure plate (123) is arranged forming an abutment for the return pressure spring (5), and in front of that, at the end, is arranged one part (124) of a socket coupling, while the other part (128, 129) of this socket coupling is arranged at the free end of the regulating rod (2) (Figs. 10, 11,12).
16. A controlling device according to Claim 15, characterised in that one part (124) of the socket coupling is formed by a socket sleeve arranged on the force transmission rod (7), the peripheral wall (cylindrical on the outside) of which sleeve is made elastic, divided by longitudinal slots (125) into several individual lamina, and is provided with grasping pads (127) thickened inwards on the front face; in that the other part of the socket coupling is formed by a socket head (128) and a clamping collar (129) which is attached, axially projecting, to the front face (130) of a cylindrical portion (131) on the regulating rod (2) and carries coaxially on front of it the socket head (128) which has a larger diameter and carries at the front and the back a sleeve-expanding cone (138/1 or 138/2); and in that a securing bush (132) is allotted to the socket head (128), said bush being displaceable on the cylindrical portion (131) against the force of a pressure spring (134) between two end positions and whose inner diameter is slightly larger than the outer diameter of the socket sleeve (124), said bush further, when the socket sleeve (124) is engaged, being axially displaceable through the front face of the then expanded peripheral wall and returnable into the initial position by means of the pressure spring (134), once the grasping pads (127) have engaged round the clamping collar (129), in which initial position expansion of the socket sleeve (124) and loosening of the coupling connection are effectively prevented.
EP87109014A 1986-07-25 1987-06-23 Control device for varying the start of the injection and/or the fuel delivery in a fuel injection pump Expired EP0256254B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87109014T ATE39162T1 (en) 1986-07-25 1987-06-23 CONTROL DEVICE FOR ADJUSTING THE INJECTION TIMING AND/OR THE DELIVERY QUANTITY OF A FUEL INJECTION PUMP.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3625235 1986-07-25
DE3625235 1986-07-25
DE3713288 1987-04-18
DE19873713288 DE3713288A1 (en) 1986-07-25 1987-04-18 CONTROL DEVICE FOR ADJUSTING THE INJECTION TIME AND / OR THE DELIVERY QUANTITY OF A FUEL INJECTION PUMP

Publications (2)

Publication Number Publication Date
EP0256254A1 EP0256254A1 (en) 1988-02-24
EP0256254B1 true EP0256254B1 (en) 1988-12-07

Family

ID=25845934

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109014A Expired EP0256254B1 (en) 1986-07-25 1987-06-23 Control device for varying the start of the injection and/or the fuel delivery in a fuel injection pump

Country Status (3)

Country Link
US (1) US4745900A (en)
EP (1) EP0256254B1 (en)
DE (2) DE3713288A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3609838A1 (en) * 1986-03-22 1987-09-24 Bosch Gmbh Robert CONTROL CYLINDER
DE4122879A1 (en) * 1991-07-11 1993-01-14 Bosch Gmbh Robert FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES
DE4130125C2 (en) * 1991-09-11 1996-04-04 Licentia Gmbh Mechanical manual adjustment device for the control stroke of an actuator
JP3906775B2 (en) * 2001-12-18 2007-04-18 株式会社デンソー Distributed fuel injection pump
US8604709B2 (en) 2007-07-31 2013-12-10 Lsi Industries, Inc. Methods and systems for controlling electrical power to DC loads
US7598683B1 (en) 2007-07-31 2009-10-06 Lsi Industries, Inc. Control of light intensity using pulses of a fixed duration and frequency
US8903577B2 (en) 2009-10-30 2014-12-02 Lsi Industries, Inc. Traction system for electrically powered vehicles
EP2993341B1 (en) * 2014-09-08 2017-03-29 Magneti Marelli S.p.A. Fuel pump for a direct injection system

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB718396A (en) * 1952-03-07 1954-11-10 Cav Ltd Hydraulic governors for controlling fuel injection pumps for internal combustion engines or other purposes
US2982278A (en) * 1960-04-14 1961-05-02 Borg Warner Fuel injection pressure compensating mechanism
US3485228A (en) * 1968-03-14 1969-12-23 Caterpillar Tractor Co Governor override for engine starting
DE1751765A1 (en) * 1968-07-25 1971-08-05 Bosch Gmbh Robert Control device for injection internal combustion engines
GB1462872A (en) * 1973-04-14 1977-01-26 Cav Ltd Actuator mechanism for a fuel injection pump control member
JPS5420232A (en) * 1977-07-15 1979-02-15 Diesel Kiki Co Ltd Electrical and mechanical speed governer for diesel engine
US4270502A (en) * 1978-06-10 1981-06-02 Lucas Industries Limited Fuel injection pumping apparatus
JPS57168033A (en) * 1981-04-10 1982-10-16 Nippon Denso Co Ltd Electric governor
JPS57183532A (en) * 1981-05-07 1982-11-11 Nippon Denso Co Ltd Electric speed governor
US4432320A (en) * 1981-06-10 1984-02-21 Friedmann & Maier Aktiengesellschaft Control equipment for adjusting the moment of fuel injection and/or amount of fuel supplied by a fuel injection pump, for internal combustion engines
DE3225085C2 (en) * 1982-07-05 1985-03-21 Daimler-Benz Ag, 7000 Stuttgart Method for controlling fuel metering for an internal combustion engine
US4493303A (en) * 1983-04-04 1985-01-15 Mack Trucks, Inc. Engine control
GB8326354D0 (en) * 1983-10-01 1983-11-02 Lucas Ind Plc Fuel pumping apparatus
US4576130A (en) * 1984-11-24 1986-03-18 Robert Bosch Gmbh Fuel injection pump for internal combustion engines

Also Published As

Publication number Publication date
DE3713288A1 (en) 1988-02-04
EP0256254A1 (en) 1988-02-24
US4745900A (en) 1988-05-24
DE3760019D1 (en) 1989-01-12
DE3713288C2 (en) 1988-08-25

Similar Documents

Publication Publication Date Title
EP2142042B1 (en) Connection means and method for connecting a first component and a second component
EP1601550B1 (en) Drive housing of a seat adjusting drive for a motor vehicle
EP2147220B9 (en) Connection means and method for connecting a first component and a second component
DE102012110648B4 (en) Locking element, connection arrangement, arrangement of a first component and a second component and method for mounting such an arrangement
EP0469334B2 (en) Method for changing the angular position of shafts for an internal combustion engine
DE3817893C2 (en)
DE3328338A1 (en) Device for adjusting a first component relative to a second component
EP0256254B1 (en) Control device for varying the start of the injection and/or the fuel delivery in a fuel injection pump
DE2610200A1 (en) Connector for furniture panels - comprises cam in one panel engaging headed pin in other panel
EP2291298B1 (en) Fixture arrangement for a seat, in particular a vehicle seat, and method for mounting such a fixture arrangement
DE102007043984A1 (en) Electromotive linear drive e.g. spindle drive, for adjusting components such as seat, has support assembly formed from support provided on thread pitch of spindle, and two rotation parts provided on both sides of support
EP0683931B1 (en) Control switch and/or signalling unit
EP2121414B1 (en) Electric power steering system with belt drive
EP0077489A2 (en) Apparatus for assembling parts, one of them having at least one radially prominent rib
EP0282786B1 (en) Coupling device for connecting pieces rotationally
DE19505374C2 (en) Device for adjusting the adjustment path of an accelerator pedal
DE10020218B4 (en) Assembly unit of a component and at least one thread-forming screw
DE2754779A1 (en) CAM DRIVEN SPRING RETURN MECHANISM, WHOSE STARTING MOMENT IS A FUNCTION OF THE CAM PROFILE AND A PROCESS FOR ITS MANUFACTURING
DE4117765A1 (en) Coupling between tool-holder and machine tool
EP1144234A1 (en) Master cylinder for a vehicle hydraulic braking system with improved return spring positioning
DE4333726A1 (en) Multiple adjustment devices drive unit - has electromotor for operating several adjustment devices via different selectable coupling elements
WO2012150078A1 (en) Camshaft connection device
EP1649151A1 (en) Method for installing a valve member in an auxiliary control valve device
DE102022104996A1 (en) Spindle assembly for a spindle drive device
AT390125B (en) DEVICE FOR COUPLING A SLIDING ACTUATOR ROD WITH A CONTROL UNIT, IN PARTICULAR A CONTROL ROD OF AN INJECTION UNIT OF AN INTERNAL COMBUSTION ENGINE

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): AT CH DE FR IT LI

17P Request for examination filed

Effective date: 19880113

17Q First examination report despatched

Effective date: 19880517

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.R.L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR IT LI

REF Corresponds to:

Ref document number: 39162

Country of ref document: AT

Date of ref document: 19881215

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3760019

Country of ref document: DE

Date of ref document: 19890112

ET Fr: translation filed
RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: MAN NUTZFAHRZEUGE AKTIENGESELLSCHAFT

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

Ref country code: CH

Payment date: 19900430

Year of fee payment: 4

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

Ref country code: AT

Payment date: 19900521

Year of fee payment: 4

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

Ref country code: FR

Payment date: 19900629

Year of fee payment: 4

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

Ref country code: DE

Payment date: 19900630

Year of fee payment: 4

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

Ref country code: AT

Effective date: 19910623

ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19910630

Ref country code: CH

Effective date: 19910630

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

Ref country code: FR

Effective date: 19920228

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: DE

Effective date: 19920401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050623