JP3488738B2 - ABS device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ABS device in which an electronic control unit and a fluid unit are connected and integrated by a two-part solenoid valve. 2. Description of the Related Art In order to brake a vehicle while ensuring vehicle stability, when a brake pedal is depressed, the pressure of a brake working fluid in a wheel cylinder of each wheel is adjusted to prevent locking of the wheels. ABS (anti-lock brake) system has been developed and installed in practical vehicles, which has been successful in preventing slip accidents. The ABS device 1 shown in FIG.
A wheel speed sensor 3 provided for each vehicle, and an electronic control unit (ECU) 4 which receives a signal from the wheel speed sensor 3 and issues a control signal for giving an appropriate braking force according to a slip ratio.
And a fluid unit (HU) 7 provided between the master cylinder 5 and the wheel cylinder 6 constitutes a main part, and a fluid supply in the fluid unit 7 is controlled by a control signal generated by the electronic control unit 4. A pair of solenoid valves (not shown) for draining is driven to open and close, and the pressure of the working fluid supplied to the wheel cylinder 6 is varied. A conventional ABS device 1 has a master cylinder 5
A fluid unit 7 connected to a pipe of a working fluid connecting the wheel cylinder 6 to the wheel cylinder 6 is provided in the engine room similarly to the pipe, but electronic components such as a microcomputer which dislikes a high-temperature and high-humidity environment are provided. The electronic control unit 4 to be mounted is installed in a vehicle room or a trunk room where there is little change in temperature and there is no danger of inundation. Therefore, the electronic control unit 4 and the fluid unit 7 are connected to a wire harness extending from the vehicle room or the trunk room into the engine room. Therefore, there is no shortage due to biting of the wire harness 8 into the vehicle body, poor contact due to connector twisting, etc., and there is a problem that the manufacturing cost is high. [0004] Therefore, in order to simplify the connection work of the wire harness and increase the space in the vehicle interior, the fluid unit and the electronic control unit are electrically connected via a junction block, and furthermore, the wire harness connected to the fluid unit is connected. There has been proposed an ABS device configured so that units can be connected to each other simply by connecting the unit to a junction block. The ABS device 11 shown in FIG. 5 shows this type of ABS device disclosed in JP-A-5-139274. The device 11 includes a solenoid valve 12
And a fluid unit 14 having a motor 13 as a base,
An electronic control unit 16 is mounted thereon via a junction block 15. The junction block 15 is provided with connectors necessary for integrating the units outside the bus bar wiring. [0005] The above-mentioned conventional AB in which the fluid unit 14 and the electronic control unit 16 are integrated with each other.
The S device 11 connects the fluid unit 14 to the electronic control unit 1
To integrate the wiring harness 6, a plurality of sets of wire harnesses 17, 18 and 19 connected to the fluid unit 14 had to be connected to the junction block 15. That is,
One end of a wire harness 17 for sending a control signal to the solenoid valve 12 is connected to the electronic control unit 16, or one end of another wire harness 18 extending from the solenoid valve 12 is connected to the fail-safe relay 20. Connection work such as connecting the wire harness 19 extending from the motor 13 to the motor relay 21 was indispensable. For this reason, although a long wiring work such as the wire harness 8 extending in the vehicle interior becomes unnecessary, for example, the solenoid valve 12 and the electronic control unit 1
The connection work of the wire harness 17 connecting the wire harnesses 6 is still necessary, and the contents of the electronic control unit 16 are protected by the box-shaped case 22,
Since the elements 7, 18, and 19 are left unexposed, there is a problem that deterioration is likely to occur in a severe environment in the engine room. Japanese Patent Application Laid-Open No. 5-139273 filed on the same day as the aforementioned Japanese Patent Application Laid-Open No. 5-139274 discloses a connection extending from a solenoid valve provided in a fluid unit in order to minimize the amount of wire harness used. An ABS device is disclosed in which terminals are connected to terminals of a flexible printed circuit on the electronic control unit side by soldering. However, this method requires a troublesome soldering operation instead of not using a wire harness, and has a problem that the connection distance is shortened but the connection takes time. Further, the electronic control unit and the fluid unit are compactly integrated as disclosed in
An ABS device disclosed in No. 6354 “Pressure control device” is known. In this device, a plurality of solenoid valves provided in a fluid unit are connected to a connection plug via a common conductor means disposed directly above a solenoid portion, and a space above the conductor means is partitioned by a partition plate. When the hood is attached from right above, the connection plug communicating with the microcomputer on the lower surface of the hood engages with the connection plug,
The microcomputer and the solenoid valve are connected together with the integration of the electronic control unit and the fluid unit. However, this requires soldering or wire bonding of conductor means to a solenoid valve incorporated in the fluid unit before integrating the electronic control unit with the fluid unit, and the connection between the electronic control unit and the fluid unit. Soldering or wire bonding is indispensable for the interface. Furthermore, since the microcomputer and the solenoid valve are electrically connected by engaging the connection plugs, there is an advantage that a wire harness is not necessary, but mechanical contact due to the engagement between the connection plugs is provided. As a weak point of the structure for maintaining an electrical connection, there is a problem that a loose connection is likely to be caused when play or the like occurs in the engaged state. [0008] The present invention relates to a microcontroller.
An electronic control unit having a pewter, determining an optimal braking force according to the slip ratio of the wheel, and outputting a control signal for varying the pressure of the working fluid for braking, and being integrated with the electronic control unit, A fluid unit that supplies a braking working fluid having a pressure corresponding to the output of the electronic control unit;
The solenoid portion is demagnetization by the control signal is incorporated in the electronic control unit, and the valve unit forming part of the integrated into the fluidic units flow path of the brake working fluid are each coalesce Consisting of 4 per row
A solenoid valve arranged in two rows in Seo of each column
The electronic control unit is arranged so as to cover the outer surface of the solenoid unit.
A single magnetic cover having an inverted U-shaped cross-section and housed in the electronic control unit;
While fixing the solenoid part, the solenoid part and
For electrically connecting the microcomputer and the microcomputer
An ABS device comprising a single substrate having a pattern, wherein the electronic control unit and the fluid unit are integrally assembled by combining the valve unit and the solenoid unit, The solenoid portion includes a coil wound in a hollow cylindrical shape, a hollow portion opens near the surface of the electronic control unit, and the valve portion projects from the fluid unit in a cylindrical shape, and the solenoid portion is The substrate is inserted into the hollow part of
The magnetic cover is located in the middle of the solenoid portion of the row, and the magnetic body cover has a magnetic path that exits from one end of the hollow portion and returns to the other end when the solenoid portion is energized and excited outside the solenoid portion of each row. It is characterized by forming. An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is an exploded perspective view of an essential part showing an embodiment of an ABS device of the present invention, and FIGS. 2 and 3 are a plan view and a front view, respectively, showing a part of the essential part shown in FIG. . The ABS device 31 shown in FIGS.
It shows only a coupling portion between the electronic control unit 32 and the fluid unit 33, and sends out a brake hydraulic fluid such as hydraulic oil in accordance with a wheel speed sensor provided for each wheel or a depression force of a brake pedal. A master cylinder, a wheel cylinder that is supplied with a braking working fluid and exerts a braking force on wheels, and the like are not shown. The illustrated electronic control unit 32 and fluid unit 33 are connected to a solenoid unit 34 of a solenoid valve 34.
There is a structural and manufacturing feature in that the s and the valve portion 34v are integrated so as to be separable. The fluid unit 33 includes a pair of valve portions 34 for pressurizing and depressurizing the brake working fluid flow path connecting the wheel cylinder and the master cylinder for each of the four front and rear wheels.
v are arranged in parallel, and a pair of these valve portions 34v are arranged side by side. The valve portion 34v has a flow path and a valve seat formed in a cylindrical stem, and is configured such that a magnetic force from the solenoid portion 34s reaches a valve body that is separated from and seated on the valve seat. The valve portion 34v has four stems arranged in two rows and projecting upward from the upper surface of the case 35 of the fluid unit 33. In the solenoid section 34s, coils wound in a hollow cylindrical shape are arranged in two rows in accordance with the arrangement pattern of the valve sections 34v, and are fixed to the lower surface of a flat substrate 36 in the electronic control unit 32. The board 36 extends from a circuit board 37 on which a microcomputer (not shown) is mounted via a flexible flat cable 36a.
It has a line pattern for electrically connecting the solenoid unit 34s and the microcomputer. The board 36 is housed in a case 38 together with a circuit board 37 and a magnetic cover 39 described later. The magnetic body cover 39 has a box shape having an inverted U-shaped cross section, is provided so as to cover the side surface of the solenoid portion 34s, and protrudes from one end of the hollow portion of the solenoid portion 34s when the solenoid portion 34s is energized and excited. A magnetic path returning to the other end is formed. The magnetic cover 39 has a rectangular opening 39a having eight semi-circular cutouts at an inner edge thereof for inserting the valve portion 34v. By the way, the fluid unit 33 and the electronic control unit 32 are manufactured separately, and the valve unit 34v and the solenoid unit 34s are combined for the first time when they are assembled, and the solenoid valve 34 for pressurizing and depressurizing corresponding to each wheel is used. Is to be completed. That is, ABS
When assembling the device 31, the valve unit 34v on the fluid unit 33 side is inserted into the hollow portion of the solenoid unit 34s on the electronic control unit 32 side. In this case, an arrangement pattern of eight valve parts 34v and eight solenoid parts 34s
Can be inserted without any problem as long as the mounting direction is correct.
When the insertion is completed, the case 35 and the case 38 are joined and integrated by bolting or the like. Thus, the solenoid valve 34, which has been divided into the solenoid portion 34s and the valve portion 34v, is completed, and the electronic control unit 3
2 and the fluid unit 33 are integrated. The solenoid valve 34 and the microcomputer in the electronic control unit 32 are connected from the beginning via a board 36 in a case 38. Therefore, the solenoid valve is provided by a specially prepared wire harness 8 or 17 or the like. Obviously, the work of connecting the electronic control unit 32 and the electronic control unit 32 is not required. Further, the soldering operation is necessary only in the manufacturing process of the electronic control unit 32 including the solenoid portion 34s, and is not limited to the manufacturing process of the fluid unit 33 including the valve portion 34v, but also for connecting the electronic control unit 32 and the fluid unit 33. In the pre-process, no soldering work is required. Therefore, for example, only the electronic control unit 32 and the fluid unit 33 manufactured in different places are gathered in one place and mechanically connected, so that the two units 32 , 33 can be easily integrated. The solenoid valve 34 includes a solenoid portion 34 s formed of a coil wound in a hollow cylindrical shape, and a cylindrical portion protrudingly provided on the fluid unit 14.
Since the electronic control unit 32 and the fluid unit 33 are integrally connected only by inserting the valve portion 34v into the solenoid portion 34s, the electronic control unit 32 and the valve portion 34v are inserted into the solenoid portion 34s. Part 3
4v only needs to be in a substantially coaxial relationship, so that it is possible to easily and surely integrate them without requiring special assembling accuracy. Further, the solenoid unit 34
A magnetic cover 39 is provided on the side of s to form a magnetic path that exits from the one end of the hollow portion and returns to the other end when the solenoid portion 34s is energized and excited, so that the magnetic force generated by the solenoid portion 34s is applied to the valve. It can be effectively used for opening and closing the part 34v. As described above, according to the present invention,
By combining the solenoid unit provided on the electronic control unit and the valve unit provided on the fluid unit, the solenoid valve is constructed and the electronic control unit and the fluid unit are assembled together. Unlike an ABS device in which a unit is simply connected to a fluid unit, a wire harness for connecting the solenoid valve and the electronic control unit is not required, and thus the integration work is simple, and the control is poor due to deterioration of the wire harness. The soldering operation is necessary only in the manufacturing process of the electronic control unit including the solenoid unit, and is not limited to the manufacturing process of the fluid unit including the valve unit, but also before the electronic control unit and the fluid unit are connected. Since no soldering work is required in the process, If the electronic control unit and a fluid unit manufactured in separate locations gathered in one place only mechanically coupling, excellent effects such as the both units can be easily integrated. Also, the solenoid valve is constituted by a solenoid portion comprising a coil wound in a hollow cylindrical shape, and a valve portion projecting from the fluid unit in a cylindrical shape and inserted into the hollow portion of the solenoid portion. Since the electronic control unit and the fluid unit are integrally connected only by inserting the valve unit into the solenoid unit, and the solenoid unit and the valve unit only need to be in a substantially coaxial relationship, special assembly accuracy is required. In addition, it is possible to easily and surely integrate them. Further, a magnetic body cover is provided which forms a magnetic path which exits from one end of the hollow portion and returns to the other end when the solenoid portion is energized and excited, so that a plurality of solenoid portions required for each wheel are provided. Is surrounded by a box-shaped magnetic material cover, the magnetic force generated by the solenoid portion can be effectively used for opening and closing the valve portion. Electronic control unit
All the solenoids are fixed inside the
Electrical connection between the solenoid and the microcomputer
A single board with a line pattern
The plate is located midway between the two rows of solenoids. one
On the other hand, the magnetic material cover has an inverted U-shaped cross section and has a plurality of
Single for solenoid section and solenoid for each row
Inside the electronic control unit so as to cover the outer surface of the
Is accepted.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of an essential part showing an embodiment of an ABS device of the present invention. FIG. 2 is a partially cutaway plan view of a main part shown in FIG. 1; FIG. 3 is a partially cutaway front view of a main part shown in FIG. 1; FIG. 4 is a schematic configuration diagram illustrating an example of a conventional ABS device. FIG. 5 is a schematic perspective view of an essential part showing an example of an improved conventional ABS device. [Description of Signs] 31 ABS device 32 Electronic control unit 33 Fluid unit 34 Solenoid valve 34s Solenoid part 34v Valve part 36 Substrate 37 Circuit board 35, 38 Case 39 Magnetic body cover

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-180550 (JP, A) JP-A-7-47942 (JP, A) Fully open Showa 60-101276 (JP, U) Really open Showa 57- 125509 (JP, U) Special Table Hei 5-505446 (JP, A) Special Table Hei 2-502900 (JP, A) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B60T 8/36 F16K 31 / 06

Claims (1)

(57) [Claim 1] An electronic device having a microcomputer, which determines an optimum braking force according to a wheel slip ratio and outputs a control signal for varying a pressure of a working fluid for braking. A control unit, a fluid unit integrated with the electronic control unit and supplying a working fluid for braking having a pressure corresponding to an output of the electronic control unit, solenoid portion being demagnetization, and the valve unit forming part of the integrated into the fluidic units flow path of the brake working fluid is constituted by each coalesce, four columns
And the solenoid valves arranged in two rows and the outer surfaces of the solenoid portions of the respective rows are covered with the solenoid valves.
Housed in electronic control unit, having inverted U-shaped cross section
A single magnetic cover and all the solenoids housed in the electronic control unit.
While fixing the solenoid, the solenoid and the
Track patterns that electrically connect computers
An ABS device comprising a single substrate having the electronic control unit and the fluid unit integrated by combining the valve unit and the solenoid unit. The portion includes a coil wound in a hollow cylindrical shape, and a hollow portion is opened near the surface of the electronic control unit. The valve portion is provided in the fluid unit in a cylindrical shape and is hollow in the solenoid portion. The substrate is located in the middle of the two rows of solenoids, and the magnetic body cover is located outside the solenoids of each row.
ABS apparatus characterized by said solenoid portion forms a magnetic path returning to the other end exits from one end of the hollow portion when it is energized energized.