KR101039034B1 - Apparatus for acquiring stability and speed of vehicle - Google Patents

Abstract

The present invention relates to a vehicle attitude and speed sensor structure, the sensor for detecting the position change of the hub shaft and the wheel speed caused by the force transmitted to the wheel from the driving surface when the vehicle is traveling, and the sensor is fixed to the inner side wall and the sensor The sensor holder is provided with a terminal terminal for receiving a signal generated from the terminal and a first connector through hole through which a connector for outputting a signal transmitted from the terminal terminal to the electronic control module (ECU) is formed. And a printed circuit board on which a metal pattern is formed so that a current flows between the terminal terminal fitting hole to be inserted and the connector terminal fitting hole into which the connector terminal is inserted, and the terminal terminal fitting hole and the connector terminal fitting hole.

Vehicle, Posture, Speed, Hub Shaft, Hub Bearing, Sensor, Printed Circuit Board, Connector

Description

Vehicle attitude and speed sensor structure {Apparatus for acquiring stability and speed of vehicle}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle attitude and speed sensor structure, and more particularly, to an integrated vehicle attitude and speed sensor structure that simultaneously detects a change in position of a hub shaft and wheel speed caused by a force transmitted from a driving surface to a wheel while driving a vehicle. .

In general, a vehicle may be classified into a driving system for driving a vehicle and a braking system using friction force between a tire and a road surface to selectively reduce a vehicle speed as needed during driving.

Recently known braking systems include an anti-skid brake system (ABS) system and an ELECTRONIC STABILITY PROGRAM (ESP) system. The braking system analyzes the operating state of the vehicle based on the road surface and the slip of the vehicle wheel, and forcibly adjusts the driving state of the vehicle by the control of the electronic controller.

The ABS (Anti-Skid Brake System) system monitors the rotational speed of the wheels measured by the wheel sensors located on each wheel of the vehicle wheel, analyzes the change in the engine moment and the wheel braking pressure, and then applies the wheel cylinder to the wheel cylinder. The pressure is controlled by reducing or increasing the applied braking hydraulic pressure so that a proper cornering force is secured to maintain steering while minimizing the braking stopping distance.

ELECTRONIC STABILITY PROGRAM (ESP) is a system that puts the brakes on the vehicle by itself in dangerous driving situations. For example, when the driver is turning at a speed that is difficult to control, the ESP system mounted on the vehicle may use the vehicle motion and road conditions obtained by various sensors to increase the actual vehicle motion than the previously stored stability reference value. The wheels are properly braked to ensure vehicle stability.

However, the ESP system requires a plurality of sensors that detect wheel rotation speed, yaw moment, steering angle of the steering wheel, and pedal force of the excel pedal. In this case, a plurality of sensors are mounted, and a connector connection for transmitting sensor signals to an electronic control module (ECU) is complicated.

The present invention has been proposed in the background as described above, and an object of the present invention is an integrated vehicle attitude and speed sensor structure which simultaneously detects a change in position of a hub shaft and wheel speed caused by a force transmitted from a driving surface to a wheel while driving a vehicle. To provide.

Another object of the present invention is to provide a vehicle attitude and speed sensor structure that can block electromagnetic waves, moisture, and foreign matter penetrating from the outside.

It is still another object of the present invention to provide a vehicle attitude and speed sensor structure in which a connector capable of transmitting sensor signals to an electronic control module (ECU) is integrally mounted.

In order to achieve the above object, the vehicle attitude and speed sensor structure mounted on the hub bearing of the vehicle according to an aspect of the present invention, the position change of the hub shaft caused by the force transmitted to the wheel from the driving surface when the vehicle is running And a sensor that senses the wheel speed, and a sensor that is fixedly installed on the inner sidewall and that receives a signal from the sensor, and a connector that outputs the signal from the terminal to the electronic control module (ECU). A current flows between the sensor holder where the first connector through hole is formed, the terminal terminal fitting hole into which the terminal terminal of the sensor holder is fitted, and the connector terminal fitting hole into which the connector terminal is fitted, and the terminal terminal fitting hole and the connector terminal fitting hole. It includes a printed circuit board on which a metal pattern is formed.

The vehicle attitude and speed sensor structure according to an additional aspect of the present invention further includes a metal cap incorporating a sensor holder and having a second connector through hole formed on a surface on which the first connector through hole of the sensor holder is located.

The vehicle attitude and speed sensor structure according to an additional aspect of the present invention further includes a connector inserted into the connector terminal fitting hole of the printed circuit board to output a signal transmitted from the terminal terminal to the electronic control module (ECU). .

According to the configuration as described above, the vehicle attitude and speed sensor structure according to the present invention is a sensor that can simultaneously detect the position change of the hub shaft and the wheel speed generated by the force transmitted to the wheel from the driving surface when the vehicle is traveling, the sensor The sensor holder is fixedly installed, and the printed circuit board mounted on the sensor holder to output the detection signal is integrally implemented, replacing the wheel speed sensor and yaw rate sensor that were previously implemented separately to the vehicle. This has a useful effect in reducing the number of parts applied and the cost.

In addition, the vehicle attitude and speed sensor structure according to the present invention includes a metal cap having a second connector through hole is formed on the surface of the sensor holder and the first connector through hole of the sensor holder, the electromagnetic wave penetrated from the outside Blocking has a useful effect to prevent the malfunction of the sensor or the printed circuit board.

In addition, the vehicle attitude and speed sensor structure according to the present invention is a connector for transmitting a sensor signal to the electronic control module (ECU) to the printed circuit board is integrally implemented, thereby connecting the vehicle attitude and speed sensor structure of the present invention. This has a useful effect of simplifying.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

1 illustrates a vehicle braking system to which a vehicle attitude and speed sensor structure according to the present invention is applied. As shown, the vehicle braking system includes an electronic control module (ECU) 20, an ESP system 40, a wheel 60, and a vehicle attitude and speed sensor structure 80.

The electronic control module (ECU) 20 controls all parts of the vehicle such as a drive system, a braking system, a steering system, including automatic transmission control, and is implemented as a conventional microcomputer. An electronic control module (ECU) 20 controls the ESP system 40 using signals input from the vehicle attitude and speed sensor structure 80.

The ESP system 40 is a system for controlling the vehicle attitude, and automatically controls the engine output and the brake. For example, the ESP system 40 increases the brake pressure when it is determined that the dangerous situation is in accordance with a signal input from the electronic control module (ECU) 20 when the vehicle accelerates too much.

The wheel 60 represents wheels used in a vehicle, and is typically implemented as an aluminum wheel. The hub 60 is connected to the wheel 60, and the hub axis rotates together with the wheel 60 when the vehicle is driven.

The vehicle attitude and speed sensor structure 80 simultaneously detects the position change of the hub shaft and the wheel speed generated by the force transmitted to the wheel 60 from the driving surface while driving the vehicle, and outputs it to the electronic control module (ECU) 20. do.

2 illustrates a vehicle attitude stabilization (ESP) system according to an embodiment of the present invention.

As shown, the ESP system is largely installed between the master cylinder 10, the storage tank 11 in which the hydraulic oil is stored, and the electronic control module (ECU) 20 and the pressure-sensitive solenoid valve 45. A hydraulic pressure sensor 31 for detecting hydraulic fluctuation, hydraulic control devices 41 to 49a and 49b, and a wheel brake 60 are implemented.

Hydraulic control devices (41 to 49a, 49b, 49c) are installed on the brake line (49a) flowing hydraulic oil from the storage tank (11) to the wheel brake (60), the inlet solenoid valve 41 is normally open and the wheel The outlet solenoid valve 42, the motor 43, and the motor 43, which are installed in the reflux line 49b through which hydraulic oil flows from the brake 60 to the storage tank 11, are normally closed. A hydraulic pump 44 having a different discharge amount, a pressure reducing solenoid valve 45 which is installed in the brake line 49a and is normally open, and a pressure velocity of the hydraulic oil are alleviated to a certain speed, and part of the hydraulic pump 44 is The remainder includes an orifice 46 for exiting into the storage tag 11, a bypass line 48 and a suction line 49c.

Typically, when the driver presses the pedal 12, the braking pressure generated by the master cylinder 10 and the power booster 13 is transmitted to the wheel brake 60 through the brake line 49a. Further, when the vehicle is steered more severely than the steering angle manipulated by the driver due to excessive turning force acting on the outer wheel turning when the vehicle is cornering, for example, the hydraulic pump 44 is driven to the wheel brake 60 located on the outer wheel turning. The braking pressure is transmitted to

3 is an exploded view of a vehicle attitude and speed sensor structure according to an embodiment of the present invention.

As shown, the vehicle attitude and speed sensor structure 90 according to the present invention is largely composed of a plurality of sensors 91, 92, 93, a sensor holder 94, a printed circuit board 95, and a metal cap 96. ) And a connector 97.

The plurality of sensors 91, 92, and 93 detect a change in the position of the hub shaft and the wheel speed generated by the force transmitted from the driving surface to the wheel when the vehicle is driven. The plurality of sensors 91, 92, and 93 may be implemented as Hall sensors or MR sensors. The plurality of sensors 91, 92, and 93 detect magnetic field changes generated by encoders in which the N pole and the S pole are alternately arranged.

In one embodiment, the sensors 91, 92, and 93 have N-poles and S-poles alternately arranged to detect a change in the magnetic field of the encoder according to the relative rotational movement of the encoder mounted on the hub shaft. Displacement detection sensor 92 including a speed sensor 91, a detection element for detecting a magnetic field change of the encoder according to the position change in a direction perpendicular to the rotation direction of the encoder mounted on the hub shaft, and a lead terminal , 93).

The sensor holder 94 is equipped with terminal terminals 941, 942, 943 for receiving signals from the sensors 91, 92, and 93 fixedly installed on the inner sidewalls, and receiving signals from the sensors 91, 92, and 93. A first connector through hole 944 is formed through which the connector 97 for outputting signals transmitted from the terminals 941, 942, and 943 to the electronic control module ECU.

In one embodiment, the sensor holder 94 has a buffer member 945 that mitigates shock when embedded in the metal cap 96 and a first connector through hole to insert the buffer member 945, as shown in FIG. An insertion groove 945a may be further formed around the 944.

In another embodiment, the sensor holder 94 may further include a metal cap 96 and a plurality of injection holes 946 through which injection liquid is injected into the metal cap 96 during injection molding. Accordingly, it is possible to prevent the malfunction of the sensors 91, 92, 93 or the printed circuit board 95 mounted on the sensor holder 94 by blocking moisture or foreign matter penetrating into the sensor holder 94 from the outside.

The printed circuit board 95 includes a terminal terminal fitting hole 951 into which the terminal terminals 941, 942, and 943 of the sensor holder 94 are fitted, and a connector terminal fitting hole 952 into which the connector terminal 971 is fitted. The metal pattern is formed between the terminal terminal fitting hole 951 and the connector terminal fitting hole 952 so that current flows through the terminal terminal fitting hole 951. The printed circuit board 95 is epoxy molded in the sensor holder 94 and is fixed to block moisture or foreign matter from penetrating from the outside.

The metal cap 96 blocks electromagnetic waves penetrating into the sensor holder 94 from the outside. The metal cap 96 includes a sensor holder 94 and is disposed on the surface where the first connector through hole 944 of the sensor holder 94 is located. The second connector through hole 961 is formed. The metal cap 96 is injection molded and fixed with the sensor holder 94 and the connector 97.

In the connector 97, a connector terminal 971 is inserted into a connector terminal fitting hole 952 of a printed circuit board 95, and a signal transmitted from the terminal terminals 941, 942, and 943 of the sensor holder 94 is transferred to the electronic control module. Output to (ECU).

4A and 4B illustrate the inside of the sensor holder according to the present invention. FIG. 4A shows a state in which a sensor is mounted, and FIG. 4B shows an injection molded state after mounting a sensor.

As shown, the sensor holder 94 is equipped with terminal terminals 941, 942, 943, a speed sensor (not shown) connected to the terminal terminal 94a and lead terminals on an inner sidewall, and a sensor holder. Displacement detection sensors 92 and 93 connected to the terminal terminals 94b and 94c of the 94 and the lead terminals 922 and 932 are fixedly installed. As shown in FIG. 4A, the displacement detection sensors 92 and 93 are installed on the inner sidewall of the sensor holder 94 so as to be spaced apart by a predetermined interval. In addition, the displacement detection sensors 92 and 93 have heights of the detection elements 921 and 931 so as to detect a change in position in a direction perpendicular to the rotational direction of the encoder with respect to the top of the sidewall of the sensor holder 94. It is installed differently.

Referring to FIG. 4B, the sensor holder 94 is inserted into the injection mold by injection molding after the speed sensor and the displacement detection sensors 92 and 93 are fixedly installed. Preferably, the sides of the detection elements 921 and 931 of the speed detection sensor and the displacement detection sensors 92 and 93 are exposed.

Figure 5 shows a state in which the connector according to the invention is injection molded with the sensor holder and the metal cap.

As shown, the sensor holder 94, the metal cap 96, and the connector 97 are assembled and then injection molded. Here, the terminal terminals 941, 942, 943 of the sensor holder 94 and a part of the connector terminal 971 of the connector 97 are injection molded to be exposed to the outside so as to be fitted to the printed circuit board. In addition, the sensor holder 94 and the metal cap 96 are tightly sealed by injection of injection liquid through a plurality of injection holes 946 formed in the sensor holder 94.

6A and 6B illustrate a state diagram of a printed circuit board according to the present invention. FIG. 6A illustrates a connector terminal and a terminal terminal inserted therein, and FIG. 6B illustrates an epoxy molded state of the printed circuit board.

First, referring to FIG. 6A, the terminal 951, 942, 943 of the sensor holder 94 and the connector terminal 971 of the connector 97 are fitted to the printed circuit board 95. Although not shown in the drawing, a metal pattern is formed on the printed circuit board 95 such that current flows between the terminal terminals 941, 942, and 943 of the sensor holder 94 and the connector terminal 971 of the connector 97.

In FIG. 6B, the printed circuit board 95 is epoxy molded and fixedly installed in the sensor holder 94. This prevents the malfunction of the printed circuit board 95 by blocking moisture or foreign matter permeated into the printed circuit board 95.

7A and 7B illustrate a principle of measuring a position change and wheel speed of a hub shaft rotating together with a wheel while driving a vehicle using a sensor according to the present invention. An example of the electrical output waveforms from the displacement sensor.

First, referring to FIG. 7A, the sensors 91, 92, and 93 are encoders according to a movement in the rotation direction A of the encoder 110 mounted on the hub shaft with N poles and S poles alternately arranged. A direction perpendicular to the rotation direction A of the speed sensor 91 including a detection element 911 and a lead terminal 912 for detecting a magnetic field change of the 110 and an encoder 110 mounted on the hub shaft ( Displacement detection sensors 92 and 93 including detection elements 921 and 931 and lead terminals 922 and 932 for detecting a change in the magnetic field of the encoder 110 according to a change in position to B). In addition, the displacement detection sensors 92 and 93 are provided with different heights of the detection elements 921 and 931 so as to accurately detect a position change of the encoder 110 in the vertical direction B. FIG. As shown in the encoder 110 used in the present invention, the N pole and the S pole are formed to be curved in a V-shape. Accordingly, when the position change of the encoder 110 occurs in the vertical direction B, the detection elements 921 and 931 of the displacement detection sensors 92 and 93 may recognize the magnetic field change of the encoder 110 more accurately. .

Hereinafter, referring to FIG. 7B, (a) shows electrical output waveforms (a-1) and (a-2) output from the displacement sensing sensors 92 and 93 when there is no change in the position of the tone wheel or encoder. , (b) are the electrical output waveforms (b-1) and (b-2) output from the displacement detection sensors 92 and 93 when there is a change in the position of the tone wheel or encoder. The electrical output waveforms a-1 and (a-2) are stored in, for example, a memory of the electronic control module ECU and used as reference output waveforms.

Electrical output waveforms output from the displacement detection sensors 92 and 93 are output to the electronic control module ECU through a connector, and electrical output waveforms output from the displacement detection sensors 92 and 93 are output from the electronic control module ECU. When b-1) and (b-2) are input, the phase difference c is calculated by comparing the stored reference output waveforms (a-1) and (a-2). Accordingly, the position change of the hub shaft and the force transmitted to the wheel may be indirectly measured by the force transmitted to the wheel from the driving surface while driving the vehicle.

Thus far, the present specification has been described with reference to the embodiments shown in the drawings so that those skilled in the art to which the present invention pertains can easily understand and reproduce the present invention. Those skilled in the art will understand that various modifications and equivalent other embodiments are possible from the embodiments of the present invention. Accordingly, the true scope of the present invention should be determined only by the appended claims.

1 illustrates a vehicle braking system to which a vehicle attitude and speed sensor structure according to the present invention is applied.

2 illustrates a vehicle attitude stabilization (ESP) system according to an embodiment of the present invention.

3 is an exploded view of a vehicle attitude and speed sensor structure according to an embodiment of the present invention.

4A and 4B illustrate the inside of the sensor holder according to the present invention. FIG. 4A shows a state in which a sensor is mounted, and FIG. 4B shows an injection molded state after mounting a sensor.

Figure 5 shows a state in which the connector according to the invention is injection molded with the sensor holder and the metal cap.

6A and 6B illustrate a state diagram of a printed circuit board according to the present invention. FIG. 6A illustrates a connector terminal and a terminal terminal inserted therein, and FIG. 6B illustrates an epoxy molded state of the printed circuit board.

7A and 7B illustrate a principle of measuring a position change and wheel speed of a hub shaft rotating together with a wheel while driving a vehicle by using a sensor according to the present invention. FIG. 7A is an exemplary view illustrating a sensor arrangement, and FIG. 7B. Is an example of the electrical output waveform from the displacement sensor.

<Simple description of the main reference numerals>

91: speed sensor 92, 93: displacement sensor

94: sensor holders 941, 942, 943: terminal terminals

944: first connector through hole 945: cushioning material

945a: insertion groove 946: injection hole

95: printed circuit board 951: terminal terminal insertion hole

952: Connector terminal hole

96: metal cap 961: second connector through hole

97: connector 971: connector terminal

110: encoder

Claims (8)

In a vehicle attitude and speed sensor structure mounted on a hub bearing of a vehicle, N and S poles are alternately arranged to include a detection element for detecting the magnetic field change of the encoder according to the relative rotational movement of the encoder mounted on the hub side, and a lead terminal for connecting the terminal of the sensor element and the sensor holder Speed sensor, and A displacement including a detection element for detecting a change in the magnetic field of the encoder according to a position change in a direction perpendicular to the rotational direction of the encoder mounted on the hub shaft, and a lead terminal connecting the detection element and the terminal terminal of the sensor holder A sensor including a detection sensor; The sensor is fixed to the inner side wall and is equipped with a terminal terminal for receiving a signal from the sensor, the first connector through hole through which the connector for outputting the signal transmitted from the terminal terminal to the electronic control module (ECU) The sensor holder is formed; And A metal pattern is formed to allow a current to flow between the terminal terminal fitting hole into which the terminal terminal of the sensor holder is inserted, the connector terminal fitting hole into which the connector terminal is inserted, and the terminal terminal fitting hole and the connector terminal fitting hole. Epoxy potted printed circuit board to be fixed to the inside; Vehicle attitude and speed sensor structure comprising a. delete The method of claim 1, wherein the displacement sensor is: It includes a first, second displacement detection sensor is installed on the inner side wall of the sensor holder spaced apart by a predetermined interval, Vehicle height and speed sensor structure, characterized in that the height of the detection element of the first, second displacement sensor is installed differently based on the upper side of the side wall of the sensor holder. The vehicle attitude and speed sensor structure of claim 1, further comprising: A metal cap having the sensor holder therein and having a second connector through hole formed on a surface on which the first connector through hole of the sensor holder is located; Vehicle attitude and speed sensor structure further comprising. The method of claim 4, wherein the sensor holder is: Shock absorbing material for cushioning the shock when built in the metal cap; And An insertion groove formed around the first connector through hole to insert the buffer member; Vehicle attitude and speed sensor structure further comprising. The method of claim 4 or 5, wherein the sensor holder is: An injection hole into which the injection liquid is injected into the metal cap during injection molding with the metal cap; Vehicle attitude and speed sensor structure further comprising. The vehicle attitude and speed sensor structure of claim 1, wherein the vehicle attitude and speed sensor structure comprises: A connector inserted into a connector terminal fitting hole of the printed circuit board to output a signal transmitted from the terminal terminal to an electronic control module (ECU); Vehicle attitude and speed sensor structure further comprising. delete

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