Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
1999-04-16
2001-07-10
Ramirez, Nestor (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S249000, C310S071000, C336S192000, C251S129110
Reexamination Certificate
active
06259184
ABSTRACT:
FIELD AND BACKGROUND OF THE INVENTION
The invention relates to a load adjusting device having a throttle valve, arranged in a throttle valve housing, for controlling the power of an internal combustion engine.
DE 38 15 735 A1 discloses a load adjusting device, in which a throttle valve is mounted in a throttle valve housing such that it can rotate. The throttle valve is adjusted as a function of parameters which can be predetermined by an actuating device, in particular an electric motor, in order to control the power of the internal combustion engine. The throttle valve housing contains, in each case separately, a throttle valve potentiometer with its own wiring as well as the electric motor with its own wiring, which must be passed individually out of the throttle valve housing.
This arrangement has the disadvantage that the large number of components means that the assembly complexity is considerable and, owing to the use of wiring, there is a risk of wires breaking.
SUMMARY OF THE INVENTION
The invention is thus based on the object of refining a load adjusting device of the type mentioned initially, in such a manner that, while retaining the compact construction, the assembly complexity is simplified and the risk of wires breaking is avoided.
According to the invention a mounting plate (
1
) having electrically conductive regions is inserted in the throttle valve housing (
18
), and the electrical connection is connected at least to the actuating device via the electrically conductive regions of the mounting plate (
1
).
The use of a mounting plate having electrically conductive regions has the advantage that the wiring can be omitted, particularly if the electrically conductive regions are connected to the electrical connection (plug). It is also advantageous that, during the assembly of the load adjusting device, the mounting plate just needs to be inserted into the throttle valve housing, so that there is no need for any further actions such as laying wires, soldering or the like. This is particularly advantageous, in particular in large-scale production of load adjusting devices, since this results in a considerable time advantage during production.
In a development of the invention, the actuating device, which is designed as an electric motor, has, in a manner known per se, carbon brushes which are loaded by means of springs and are connected to a commutator of the electric motor, and at least the carbon brushes and the springs are arranged on and/or in the mounting plate. This has the advantage that elements of the electric motor can also be preinstalled in the mounting plate at this stage, so that there is no wiring for the electric motor, either. Furthermore, it is advantageous that different electric motors can be used with one preconfigured mounting plate.
In a development of the invention, the mounting plate accommodates suppression means such as suppression inductors, suppression capacitors or the like, for the actuating device. Once again, the suppression means do not need to be fitted separately on the electric motor, since the mounting plate is arranged in the immediate vicinity of the electric motor, and suppression means which are arranged in the mounting plate thus have an optimum effect.
In a development of the invention, the mounting plate has a plug or a socket as the electrical connection, and the plug and/or the socket are designed in one or more parts, in particular in two parts. In this case, the plug or the socket can form a unit with the mounting plate, which is particularly advantageous during the production of the mounting plate, or else can be designed as a separate component, which then has the advantage that different types of plugs or sockets which may have different shapes, for example depending on the respective manufacturer, and can be attached to the mounting plate, for example by means of screw connections, bonding or the like. To this end, the invention advantageously provides that one part of the multi-part plug or of the multi-part socket can be connected to the mounting plate.
In a development of the invention, a seal is provided between the plug or the socket and/or between the parts of the plug or of the socket and the throttle valve housing. This has the advantage that the region in which the plug or the socket is passed out of the throttle valve housing is reliably sealed against environmental influences (in particular moisture and dust).
In a development of the invention, a plurality of track regions of a throttle-valve potentiometer for detecting the position of the throttle valve are arranged on the mounting plate, the mounting plate extends around a region of a throttle valve shaft, and the plurality of track regions are arranged concentrically around the throttle valve shaft. This has the advantage that, when the mounting plate is inserted into the throttle valve housing, a major proportion, namely the plurality of track regions (conductor and resistor regions) of the throttle valve potentiometer is available, and only the wiper pick-up still needs to be fitted. Since the plurality of track regions are likewise routed to the electrical connection via electrically conductive regions in the mounting plate, there is once again no need for any corresponding wiring in this case. Furthermore, it is feasible for the mounting plate to include switches or the like, for example for defining a throttle valve idle position.
In a development of the invention, a bleed resistor is connected between the throttle valve housing and a connection, particularly an electrical connection which is connected to the carbon brush of the electric motor. This bleed resistor is particularly advantageous if the induction manifold is made of plastic, in which case there is a risk of static charge building up on the throttle valve housing. The bleed resistor is arranged on or in the mounting plate and may be connected, for example by a clamped connection, to the throttle valve housing.
In a development of the invention, the electrically conductive regions of the mounting plate are designed as conductor tracks arranged on the mounting plate. The conductor tracks may be produced, for example, by etching away that part which is not required of the total electrically conductive regions on the mounting plate.
In a development of the invention, the mounting plate is designed with a plurality of layers, and the electrically conductive regions are inserted between an electrically non-conductive upper layer and lower layer. This is particularly advantageous when, for example, high currents flow to the electric motor, for which the conductor tracks would not have been designed.
In a development of the invention, the mounting plate is designed in a number of parts and an electrical contact between the respective electrically conductive regions is provided in the connecting region, in particular of the ends of the plurality of mounting plate parts. A plurality of mounting plate parts can thus be assembled in an advantageous manner in a type of building-block system, and may differ in terms of geometric extent or other specifications. Thus, for example, it is advantageous for a base mounting plate to be used which, on the one hand, accommodates the electrical connection and the springs of the electric motor and, on the other hand, a supplementary mounting plate can be connected to it, which has the plurality of track regions for the throttle valve potentiometer. The plurality of mounting plate parts may, for example, have holes in which pins on the throttle valve housing engage after assembly, and fix the mounting plate parts in their position.
In a development of the invention, the mounting plate or the plurality of mounting plate parts can be fixed by the throttle valve housing or a cover which closes the throttle valve housing, or some other cover. This represents a further simplification of the assembly process, since, essentially, only the actuating device (in particular the electric motor including any transmission that there may be), the mounting plate or the
Dinh Le Dang
Farber Martin A.
Mannesmann VDO AG
Ramirez Nestor
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