DD290757A5 - SENSOR FOR GENERATING SIGNALS - Google Patents

Abstract

The invention relates to a sensor for generating signals and finds application in the ignition of internal combustion engines. The sensor according to the invention has a magnetic back-closing element which at the same time has an attachment for the sensor unit. The magnetic field sensitive element of the sensor consists of a Hall effect circuit with trigger output. The magnetic feedback element is connected to the Hall circuit through a plastic coating. Fig. 1 {sensor; signals; Ignition; Internal combustion engines; Return element, magnetic; Hall circuit; Trigger output; Plastic}

Description

For this 1 page drawings

Field of application of the invention

The invention relates to a sensor for generating signals and is mainly used in the ignition of internal combustion engines.

Characteristic of the known state of the art There are already known sensors based on magnetic field sensitive elements such. B. Hall elements, the

use magnetic induction to trigger a signal. By suitably selected magnetic yoke elements, the magnetic induction in the region of the magnetic field-sensitive element is increased. These yoke elements are either injected into the sensor or cast or are attached by other mechanical connections to the magnetic field-sensitive element.

For practical application, it is necessary to use these sensors in appropriate places, such. B. on the stator of a Distributor, to position. For the positioning of the sensors these are with corresponding holding elements

equipped.

Furthermore, sensors are known in which the shape of the sensor has been selected so that during injection of the

magnet sensitive element including the magnetic return and the electrical connections

Retaining elements arise. For example, these may be specially formed cavities used to make screw prongs. In other known sensors, the attachment takes place via specially shaped and injected as inserts in the sensors Metal parts. In these solutions, however, there are technological disadvantages, since both yoke elements as well Fasteners are required, which require increased manufacturing and assembly costs. Object of the invention

The aim of the invention is to develop a technically simple and technologically cost-effective sensor for generating signals.

Explanation of the essence of the invention The invention has for its object to provide a sensor for generating signals in internal combustion engines

can be used.

According to the invention the object is achieved by the sensor has a magnetic yoke element, which

at the same time has a fastening for the sensor unit. The magnetic field sensitive element of the sensor consists of a Hall effect circuit with trigger output. The magnetic yoke element is connected to the Hall circuit through a plastic coating.

The solution according to the invention ensures safe control of internal combustion engines with simultaneous attachment

of the sensor at the place of use.

embodiment

The invention will be explained in more detail by way of an example of execution with corresponding basic drawings. Show it

Fig. 1: Top view of the inventive sensor Flg. 2: Section A-A to Flg.1

For generating signals for the ignition of internal combustion engines, the sensor 1 is connected to the stator, wherein a magnet located on a rotor is used for triggering the signal. Due to the magnetic field-sensitive element 3 contained in the sensor, which has a trigger output, the signal is triggered when the magnet passes by. By the magnetic yoke 2, the field of the guided magnet is concentrated in the region of the magnetic field-sensitive element, consisting of a Hall circuit with trigger output. To achieve a high concentration of the yoke element is to be arranged as possible on the magnetic field-sensitive element. The attachment of the yoke element to the magnetosensitive element is achieved by embedding in plastic, without causing this plastic passes between the magnetically sensitive element and the magnetic yoke. When mounting magnetic Rückschlußolement and magnetic field sensitive element by plastic, e.g. in the injection process, the ends of the connecting elements 4 and 5 of the magnetic field-sensitive element can be enveloped at the same time, wherein the attachment of the sensor provided for parts of the magnetic yoke element are covered only so far with plastic, as for the intended type of attachment, for. B. on the stator, is required. According to the design solution of the sensor, the mechanical attachment 7 can be done by screws, rivets or welding.

Claims (3)

1. Sensor for generating signals with a plastic injected and provided with electrical connection elements magnetic field sensitive element, characterized in that the sensor (1) has a magnetic yoke element (2), which at the same time has a fastening (7) for the sensor unit. 2. Sensor according to claim 1, characterized in that the magnetic field sensitive element (3) of the sensor consists of a Hall effect circuit with trigger output. 3. Sensor according to claim 1 and 2, characterized in that the magnetic yoke element is connected to the Hall circuit by a coating of plastic (6).