Control device for the adjustment of the injection timing and/or the delivery rate of a fuel injection pump
First Claim
1. A control device for the setting of the timing and/or the delivery rate of a fuel injection pump (1) for IC engines in which the setting signals of a microprocessor are able to be transmitted by an electrical stepper motor (3) via motion transmitting members (6 and 7) with an intermediately placed spring force storage means (4) to a control rod (2) and a return compression spring (5) is provided for the return of the control rod (2) into its zero delivery setting, the spring force storage means (4) having two spring plates (13 and 14) able to be moved in opposite directions and having a tensioned compression spring (12) between them, the maximum distance apart of the plates (13 and 14) being limited by abutments (15 and 16) in a surrounding housing (17), the stepper motor (3) on the one hand and the control rod (2) on the other hand being connected with the spring force storage means (4) through an intermediate motion transmitting member (6 and 7, respectively) and the motion transmitting member on the control rod side is a force transmitting rod (7) which extends through the two spring plates (13 and 14) and has abutments (21 and 22), which cooperate with the sides, remote from the compression spring of the spring force storage means, of the spring plates characterized in that the housing (55) of a mechanical tachometer generator (8) feeding signals to the microprocessor and, separately from this, a housing (24) containing the motion transmitting member (6), the spring force storage means (4), the force transmitting rod (7) and the return compression spring (5) are fixedly mounted on a base plate (11), in that on opposite sides of this housing (24) the stepper motor (3) and a step generator (10) detecting the steps thereof, each having their own housing (25 and 33, respectively), are flange-mounted, in that the stepper motor (3), the motion transmitting member (6) on the stepper motor side, the spring force storage means (4), the force transmitting rod (7) and the return spring (5) form a sub-assembly mounted on the base plate (11), and in that the base plate (11) is adapted to be flange-mounted with the aid of locating means (92, 93;
- 103 and
104) on the fuel injection pump (1) with the production of positionally correct operative connections of the power transmitting rod (7) and the control rod (2) on the one hand and of the injection pump shaft (9) and the tachometer generator (8) on the other hand, the rotating part (59) of the tachometer generator (8) having been previously mounted on the injection pump shaft (9) or mounted in the housing (55) of the tachometer generator (8).
1 Assignment
0 Petitions
Accused Products
Abstract
The invention relates to a control device for the adjustment of the injection timing and/or the pumping rate of a fuel injection pump for IC engines in which the control commands from a microprocessor are transmitted by way of an electrical stepper motor via motion transmitting members with an intermediate spring force storage means to a control rod of the pump, there is a return compression spring with which the control rod may be returned from any position thereof to the zero delivery position. The stepper motor, the motion transmitting members, the spring force storage means and the return spring, an electro-mechanical tachometer generator driven by the injection pump shaft and responding to the speed of rotation thereof and a step generator responding to the steps of the stepper motor, are arranged as a sub-assembly, which is either adapted to be mounted on the outside of the injection pump in an assembled condition or, with the essential components in an assembled condition, are able to be connected with other assembled parts on the control rod and/or on the injection pump shaft when the injection pump is fitted in place.
18 Citations
16 Claims
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1. A control device for the setting of the timing and/or the delivery rate of a fuel injection pump (1) for IC engines in which the setting signals of a microprocessor are able to be transmitted by an electrical stepper motor (3) via motion transmitting members (6 and 7) with an intermediately placed spring force storage means (4) to a control rod (2) and a return compression spring (5) is provided for the return of the control rod (2) into its zero delivery setting, the spring force storage means (4) having two spring plates (13 and 14) able to be moved in opposite directions and having a tensioned compression spring (12) between them, the maximum distance apart of the plates (13 and 14) being limited by abutments (15 and 16) in a surrounding housing (17), the stepper motor (3) on the one hand and the control rod (2) on the other hand being connected with the spring force storage means (4) through an intermediate motion transmitting member (6 and 7, respectively) and the motion transmitting member on the control rod side is a force transmitting rod (7) which extends through the two spring plates (13 and 14) and has abutments (21 and 22), which cooperate with the sides, remote from the compression spring of the spring force storage means, of the spring plates characterized in that the housing (55) of a mechanical tachometer generator (8) feeding signals to the microprocessor and, separately from this, a housing (24) containing the motion transmitting member (6), the spring force storage means (4), the force transmitting rod (7) and the return compression spring (5) are fixedly mounted on a base plate (11), in that on opposite sides of this housing (24) the stepper motor (3) and a step generator (10) detecting the steps thereof, each having their own housing (25 and 33, respectively), are flange-mounted, in that the stepper motor (3), the motion transmitting member (6) on the stepper motor side, the spring force storage means (4), the force transmitting rod (7) and the return spring (5) form a sub-assembly mounted on the base plate (11), and in that the base plate (11) is adapted to be flange-mounted with the aid of locating means (92, 93;
- 103 and
104) on the fuel injection pump (1) with the production of positionally correct operative connections of the power transmitting rod (7) and the control rod (2) on the one hand and of the injection pump shaft (9) and the tachometer generator (8) on the other hand, the rotating part (59) of the tachometer generator (8) having been previously mounted on the injection pump shaft (9) or mounted in the housing (55) of the tachometer generator (8). - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16)
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2. A control device for the setting of the timing and/or the delivery rate of a fuel injection pump (1) for IC engines in which the setting signals for a microprocessor are able to be transmitted by an electrical stepper motor (3) via motion transmitting members (6 and 7) with an intermediately placed spring force storage means (4) to a control rod (2) and a return compression spring (5) is provided for the return of the control rod (2) into its zero delivery setting, the spring force storage means (4) having two spring plates (13 and 14) able to be moved in opposite directions and having a tensioned compression spring (12) between them, the maximum distance apart of the plates (13 and 14) being limited by abutments (15 and 16) in a surrounding housing (17), the stepper motor (3) on the one hand and the control rod (2) on the other hand being connected with the spring force storage means (4) through an intermediate motion transmitting member (6 and 7, respectively) and the motion transmitting member on the control rod side is a force transmitting rod (7) which extends through the two spring plates (13 and 14) and has abutments (21 and 22), which cooperate with the sides, remote from the compression spring of the spring force storage means, of the spring plates characterized in that the housing (55) of a mechanical tachometer generator (8) feeding signals to the microprocessor and, separately from this, a housing (24) containing the motion transmitting member (6), the spring force storage means (4), the force transmitting rod (7) and the return compression spring (5) are fixedly mounted on a base plate (11), in that on opposite sides of this housing (24) the stepper motor (3) and a step generator (10) detecting the steps thereof, each having their own housing (25 and 33, respectively), are flange-mounted, in that the stepper motor (3), the motion transmitting member (6) on the stepper motor side and the spring force storage means (4) form a sub-assembly mounted on the base plate (11), whereas the force transmitting means rod (7) and the tensioned return spring (5) form a sub-assembly mounted on the projecting control rod end on the injection pump (1) and in that the base plate (11) is adapted to be flange-mounted with the aid of locating means (92, 93;
- 103 and
104) on the fuel injection pump (1) with the production of positionally correct operative connections of the power transmitting rod (7) and the control rod (2) on the one hand and of the injection pump shaft (9) and the tachometer generator (8) on the other hand, the rotating part (59) of the tachometer generator (8) having been previously mounted on the injection pump shaft (9) or mounted in the housing (55) of the tachometer generator (8). - View Dependent Claims (14)
- 103 and
Specification