KR0138146Y1 - Motor position sensor for idle speed controlling - Google Patents

Abstract

The motor position sensor for the idle speed control of a car that can improve the contact reliability and productivity of the pattern and the contact by improving the shape of the printed board. The motor position sensor is formed separately from the cover and the ceramic printed board. Since it has a structure in which a contact having at least two elastic contact pieces is incorporated in a case,

The insert mold manufacturing process is omitted, improving productivity, solderability, and reducing costs, and the contact between the pattern and the contact is elastic, so that the reliability is high, and the wear life of the contact is sufficiently compensated, resulting in a long service life. There is an advantage.

Description

Motor position sensor for idle speed control

The present invention relates to a motor position sensor, and more particularly, to a motor position sensor for an idle speed control of an automobile, which can improve the contact reliability of patterns and contacts and improve the ease of manufacturing when molding a printed board by improving the shape of a printed board. will be.

In general, the speed control of an automobile is achieved by increasing or decreasing the opening ratio of a thin disc throttle valve, which is connected to an accelerator pedal by a linkage or a wire and controls the amount of air or a mixer sucked into the engine.

With reference to FIG. 1, the adjustment structure of the vehicle speed by the conventional throttle body is demonstrated. 1 is an exploded perspective view showing a conventional throttle body structure. A throttle body 10 having a thin disc throttle valve 12 therein for controlling the amount of air sucked into the engine from the injection, and a linkage or wire to the accelerator pedal to move the throttle valve 12; A throttle lever 20 rotatably and elastically mounted on a fixed shaft 22 formed on one side of the throttle body 10 and opposite to the throttle lever 20, Throttle position sensor (TPS) 30 for detecting a position and an idle speed installed on the upper side of the throttle body 10 and including a speed regulating servo 60 for controlling the engine speed during idling. Consists of a controller (ISC: Idle Speed Controller) (50).

In Fig. 1, reference numeral 23 denotes a return spring for generating a return force for always returning the throttle body 10, 24 and 25 are free levers, and 26 are adjustments to adjust the amount of the throttle lever 20. It is a lever, and 52 are three connectors provided in the idle speed control part 50, for a throttle position sensor, a motor, and a motor position, and 54 is a connector for supporting and fixing the three connectors 52. It is a bracket.

In a vehicle, a configuration capable of obtaining proper engine torque even at idling as well as acceleration during driving is essential. In other words, in order to operate the air conditioner or heater normally during the winter / summer season, the ECU detects a signal and automatically controls the engine speed appropriately even when the driver does not step on the accelerator to obtain the desired output and prevents incomplete combustion. Reducing carbon monoxide emissions.

2 is a cross-sectional view showing a conventional idle speed control unit 50. As shown in the figure, the idle speed control is configured to send a control signal to various electronic control devices, for example, a system such as an ECU (Electronic Control Unit) or an ECM (Electronic Control Module) (not shown). Has

That is, in order to detect a signal for engine control, when the motor M is driven, the worm gear 55 connected to the motor M rotates, and the worm gear 55 of the speed regulating servo 60 is rotated. Since it is combined with the worm wheel 61, by rotating it, the plunger 62 in the speed control servo 60 moves up and down. At this time, the motor position sensor 63, which is one of the contact switches, is installed above the speed regulating servo 60, more precisely, above the plunger 62, and between the motor position sensor 63 and the plunger 62. Since the actuator 64 including the operation pin 64a is provided, the length of the operation pin 34a changes relatively during the vertical reciprocation of the plunger 62 so that the motor position sensor 63 The output voltage is obtained by a so-called variable resistance method in which the internal resistance of the device changes, and the signal is sent to the ECU.The ECU performs predetermined processing by the built-in memory, the central processing unit, etc. To adjust the engine speed during idle, and an idle switch 66 including a push pin 65 is installed at the lower end of the plunger 62, which contacts the throttle lever 20 and Engine speed idle It also tells the ECU that it is a condition.

Here, the motor position sensor 63 will be described in more detail. 3 is an exploded perspective view showing the structure of the motor position sensor 63. In this figure, reference numeral 63a denotes a case having a hole 63b for passing through the operation pin 64a, 63c denotes an attachment piece having an attachment hole for attaching the case 63a to the idle speed control unit 50, 63d is a connector with a riveted contact, 63e is a mold printed board, 63f is a pattern formed on the mold printed board 63e, and 63h is a connector including a cable 63g. A terminal 63i is formed at the rear end of the pattern 63f, and the actuator 64 is elastically installed by a spring 63j. The cable 63g and the terminal 63i are connected by soldering, and the mold printed board 63e and the case 63a are molded with epoxy resin for waterproofing.

The internal structure of the case 63a will be described in more detail. 4 is a cross-sectional view of the motor position sensor 63, more precisely the case 63a. The inside is divided into a spring insertion groove (63k), the operator insertion groove (63l), the mold printing substrate insertion groove (63m). 5 is a sectional view showing the main parts of the contact movement state between the contact 63d and the pattern 63f and the molding state of the terminal 63 of the mold printing substrate 63e. As shown in this figure, the contact 63d is in contact with the pattern 63f, and the resistance is varied by sliding movement by the reciprocating motion of the operator 64, and the mold printed circuit board 63e is a terminal. (63i) is bent and molded.

The mold printed circuit board 63e causes an increase in the manufacturing cost as the mold manufacturing by manual operation must be performed in a molding relationship in which the terminal 63i is inserted. In addition, the sliding motion caused by the contact between the pattern 63f and the contact 63d on the mold printed circuit board 63e deteriorates substantially due to the structural weakness, causing vibration, etc., thereby lowering reliability as a sensor.

The present invention has been devised in view of the above problems, and its object is to improve the contact reliability of patterns and contacts and improve the printed circuit board by improving the shape of the printed board, which is a part of the motor position sensor for controlling the idle speed of a car. The present invention provides a motor position sensor for an idle speed control of a vehicle that can be manufactured easily in molding.

1 is an exploded perspective view showing a conventional throttle body structure.

2 is a cross-sectional view showing a conventional idle speed control unit.

Figure 3 is an exploded perspective view showing the structure of a conventional motor position sensor.

Figure 4 is a cross-sectional view showing a case of a conventional motor position sensor.

5 is a cross-sectional view showing main parts of a conventional motor position sensor for idle speed control.

Figure 6 is an exploded perspective view showing the main configuration of the motor position sensor for idle speed control of the present invention.

7 is a cross-sectional view showing the operating state of the motor position sensor for idle speed control of the present invention.

* Explanation of symbols for main parts of the drawings

10: throttle body 12: throttle valve

20: throttle lever 22: fixed shaft

23: return spring 24, 25: free lever

26: adjusting lever

30: Throttle Position Sensor (TPS)

50: Idle Speed Controller (ISC)

52: connector (for throttle position sensor, motor, motor position)

54: connector bracket 55: worm gear

60: speed control servo 61: worm wheel

62: plunger 63: motor position sensor

63a: case 63b: hole

63c: Attachment 63d: Contact

63e: Mold printed circuit board 63f: Pattern

63g: Cable 63h: Connector

63i: Terminal 63j: Spring

63k: Spring insertion groove 63l: Operator insertion groove

63m: Mold printed board insertion groove 64: Operator

64a: Operation pin 65: Push pin

66: Idle Switch 70: Cover

72: protrusion 74: locking portion

80: ceramic printed circuit board 82: terminal hole

90 contact 92 elastic contact piece

M: Motor H: Contact Terminal Height

Motor position sensor for idle speed control of the present invention for achieving the above object is installed on a throttle body with a built-in throttle valve and the throttle lever on the side, the operator to detect a signal for engine control, In the motor position sensor for idle speed control of an automobile including a printed board, the motor position sensor is formed by separating the cover and the ceramic printed board and having a rontact having at least two elastic contact pieces in the case. It is a structure made.

Here, the cover is preferably formed integrally with a predetermined number of protrusions toward the inside, and a predetermined number of locking portions are integrally formed at the bottom for smooth assembly to the case, and the ceramic printing It is preferable that the pattern of a board | substrate forms the several terminal hole for accommodating the terminal of a cable, and it is preferable that the said contact has at least 2 elastic contact pieces by which the terminal part edge was bent.

According to the motor position sensor for idle speed control having such a configuration, since the substrate, which is one of the important components of the sensor, is composed of a ceramic printed board, the insert mold fabrication process is omitted, thereby improving productivity and solderability and improving cost. Since the contact between the pattern and the contact on the ceramic printed circuit board is the elastic contact method by the elastic contact piece, the vibration resistance is good, the reliability of the sensor is high, and the contact according to the slide contact is set by setting the contact terminal height of the predetermined dimension. The wear life of the contact is sufficiently compensated for and the life of the contact is long.

EXAMPLE

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the motor position detection sensor for idle speed control of the present invention. For the same parts as the conventional description, the same reference numerals are used to avoid the complicated description.

Figure 6 is an exploded perspective view showing the main configuration of the motor position sensor for idle speed control of the present invention. In this figure, reference numeral 70 denotes a cover, 80 denotes a ceramic printed circuit board made of ceramic material, and 90 denotes a contact. Basically, the cover 70 is separated from the ceramic printed circuit board 80.

The cover 70 is integrally formed with a predetermined number of protrusions 72 toward the inner side and a predetermined number of locking portions 74 are downwardly formed for lower assembly to the case 63a. It is.

The end of the pattern 63f of the ceramic printed circuit board 80 forms a plurality of terminal holes 82 for receiving terminals for connection with the cable 63h.

The terminal portion of the contact 90 is composed of at least two elastic contact pieces 92 whose ends are bent.

As shown in FIG. 7, the motor position sensor for idle speed control according to the present invention including the configuration as described above has a terminal portion which slides in contact with the pattern 63f by the operator 64. Since the end portion has at least two elastic contact pieces 92 which are bent, the contact with the pattern 63f is always performed with the elastic force pushed toward the pattern 63f side, so that the contact is made despite the poor road surface or rough driving when the vehicle is running. The degree is constant so that a uniform and highly variable resistance value can be obtained.

According to the motor position detection sensor for idle speed control of the present invention as described above, since the substrate, which is one of the important components of the sensor, is composed of a ceramic printed board, the insert mold fabrication process is omitted, resulting in productivity and solderability. Because the contact between the pattern and the contact on the ceramic printed circuit board is the elastic contact method by the elastic contact piece, the vibration resistance is good, the sensor reliability is high, and the contact terminal height as shown in FIG. By setting H), the wear of the contact due to the slide contact is sufficiently compensated, and the life of the contact is long.

The principles of the present invention have been presented thus far, including structural details and the multifunctional benefits obtained therefrom. Application of the motor position sensor for idle speed control of the present invention to a general motor position sensor of an automobile will be well understood by those skilled in the art.

Claims (4)

A motor position sensor for an idle speed control of an automobile including an operator and a printed circuit board, which is mounted on a throttle body having a throttle valve and a throttle lever mounted on a side thereof, for detecting a signal for engine control. The motor position sensor, the motor position sensor for idle speed control, characterized in that the structure is formed by separating the cover and the ceramic printed circuit board and the contact value of the at least two elastic contact pieces in the case. The cover is characterized in that the predetermined number of protrusions are integrally formed toward the inside, and the predetermined number of locking portions are integrally formed toward the bottom for smooth assembly to the case. Motor position sensor for idle speed control. 2. The motor speed sensor for idle speed control according to claim 1, wherein the pattern of the ceramic printed circuit board has a plurality of terminal holes formed at the ends thereof to receive terminals of the cable. The motor position sensor for idle speed control according to claim 1, wherein the contact has at least two elastic contact pieces whose end portions are bent.