RU3489U1 - VEHICLE SPEED SENSOR - Google Patents

Abstract

A vehicle speed sensor comprising a shaft, a pulse shaper, consisting of a printed circuit board with a microcircuit and a permanent magnet, a pulse shaper housing and a harness with a connector for connecting to the vehicle’s power supply and computer, characterized in that the permanent magnet of the pulse shaper is rigidly fixed to the shaft and has a ring a multipolar structure, and a printed circuit board with a microcircuit connected to the bundle is installed inside the case of the pulse former and hermetically filled with its plastic material.

Description

Car Speed Sensor

The utility model relates to the field of automotive industry and can be used for control systems for injection of fuel into the engine under various modes of vehicle movement, as well as in trip computers.

Known vehicle SPEED sensor, support shaft, IMPULS shaper, consisting of a multi-pole stator winding and a permanent ring magnet, IMPULSE Shaper body and HARNESS with a connector for connecting to a car computer, for example, SPEED sensor with CONDITION 8.30101 NAME 43-NAME 43, NAME 43010, type 103; .

The disadvantages of this DESIGN are the high technological complexity of manufacturing a multi-pole stator coil and large weight and size characteristics.

A vehicle SPEED sensor comprising a shaft is also known. Shaper of PULSES, consisting of a printed circuit board with a microcircuit and a permanent magnet, CASE of Shaper of PULSES and HARNESS with a connector for connecting to the power supply and the computer of the car, TU 308-S3 RYUIE. 402133. 501 TU, manufactured by the KURSK JSC Scammash, G. KURSK, UL. Republican, b.

In this CONSTRUCTION, an impeller is fixed on the shaft, which, during rotation, blocks the magnetic flux between the TWO-Pole permanent magnet and the microcircuit.

The disadvantage of this CONSTRUCTION is the high technological adaptability of the sensors due to the instability of the parameters of magnetic materials and the presence of TWO magnetic CIRCUITS in the DESIGN with a large number of elements (permanent magnet, impeller, microcircuit, core, shaft, sleeve). These elements

dissimilar materials consist of and when the sensors are fired, due to the presence of TOLERANCES, gaps of different sizes are formed, which leads to the individual adjustment of each sensor to obtain stable characteristics, i.e., to selective assembly.

The essence of the claimed utility model lies in the tone that the SPEED sensor of the vehicle containing the shaft. The IMPULSE driver, consisting of a printed circuit board with a microcircuit and a permanent magnet, the IMPULSE generator and harness with a connector for connecting to the power supply and the car computer has a permanent magnet with a ring multipole STRUCTURE mounted on the shaft, and a printed circuit board with a microcircuit connected to the HARNESS is installed the case of the IMPULSE Shaper and hermetically filled with its plastic material,

The use of this utility model provides the creation of a DESIGN with low manufacturing complexity and small weight and size characteristics. The use of a chip and a printed circuit board filled with plastic material in the case of the IMPULSE FORMULATOR creates reliable tightness of the entire DESIGN, which is especially necessary for the SPEED sensor located under the car and working under conditions of high humidity and dust, as well as among oil and gas sprays.

The claimed utility model is illustrated by a drawing, which shows a general view of the vehicle SPEED sensor.

The vehicle SPEED sensor includes a shaft 1 installed in housings 2 and 3 with HUB 4, an IMPULSE driver, consisting of a printed circuit board with a microcircuit 5 and a permanent magnet 6, an IMPULSE FORMER 3 housing, a protective cap 7 and a harness with a connector 8 for connection to power and car computer.

HOUSING 2 molded from plastic. The tail part of the housing 2 is made in the shape of a hexagon with a turnkey grip, and on the inside, has a threaded hole for connecting a speedometer to the gearbox of the car (not shown in the drawing). In buildings 2 and 3, a through axial hole is made in which bronze-graphite is filled BUSHING 4.

In the inner cavity formed by the housings 2 and 3 on the shaft 1, a COLUMN magnet of a multipolar STRUCTURE b, the pairs of poles of WHICH are located in its CIRCLE, is filled with plastic material of the CASES.

The printed circuit board 5 with the circuit elements located on it and with the microcircuit, as well as with the soldered wires of the bundle, is filled with the plastic material of the CASES in the Form, forming at the same time a single STRUCTURE of the housing of the Shaper of PULSES 3, which then connects to the CASE 2 with glue.

The HOUSING of the IMPULSE Shaper 3 from the external SIDE has a threaded part for connecting the speedometer cable (not shown in the drawing) and an internal passage bore for the shaft 1 with a made seat for the rubber seal (gasket) 3, WHICH prevents moisture from getting INSIDE the sensor from the side of the shaft to be re-mounted and speedometer

If the cable of the speedometer is not connected, then a protective cap 7 is installed on its mrgtp,

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The sensor is connected by HARNESS 8.

The DEVICE works as follows: er.

When installing on the vehicle with a tail sensor

case 2 is screwed onto the speedometer cable DRIVE

the movement of the car, or with a connector on the harness of the naril-morning computer,

When the vehicle is moving, the DRIVE of the gearbox speedometer cable transmits rotation to shaft 1, together with WHICH the multi-pole ring magnet b rotates.

The rotation of magnet b gives a time-sinusoidal FUNCTION of changes in the magnetic field. When each pair of poles passes by the microcircuit of the printed circuit board 5, a sequence of PULSEES of a certain number is generated at its output.

The output sequence of PULSES is converted, for example, by route computer, into DIGITAL SPEED information

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Provides him with reliable operation throughout the life of the car.

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Claims (1)

A vehicle speed sensor comprising a shaft, a pulse shaper, consisting of a printed circuit board with a microcircuit and a permanent magnet, a pulse shaper housing and a harness with a connector for connecting to the vehicle’s power supply and computer, characterized in that the permanent magnet of the pulse shaper is rigidly fixed to the shaft and has a ring a multipolar structure, and a printed circuit board with a microcircuit connected to the bundle is installed inside the case of the pulse former and hermetically filled with its plastic material.