KR101839885B1 - Automatic transmission control apparatus and control method thereof - Google Patents

Abstract

The present invention discloses an automatic transmission control device and an operation method of the automatic transmission control device. That is, an automatic transmission control device and an operation method of an automatic transmission control device capable of enabling a high-side open failure diagnosis of a control solenoid for gear shifting in a transmission (or an automatic transmission) are disclosed do.

Description

TECHNICAL FIELD [0001] The present invention relates to an automatic transmission control device and an automatic transmission control device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology relating to an automatic transmission control device that automatically performs gear shifting of a vehicle, and more particularly to a technique related to an automatic transmission control device that automatically shifts a vehicle to a high- And to a method for enabling open fault diagnosis.

Generally, in the case of an automatic transmission vehicle (or an automatic transmission vehicle), an engine control unit (ECU) and a transmission control unit (TCU) for controlling an engine and a transmission (or an automatic transmission) Control to the best condition to fit.

In such an automatic transmission vehicle, the transmission control unit (TCU) controls the solenoid of the transmission (hereinafter referred to as " the transmission ") according to the overall shift conditions based on necessary parameters such as the running speed of the vehicle, the accelerator pedal position sensor , Control solenoid) to control the hydraulic pressure to automatically perform the gear shift (for example, upshift or downshift).

The transmission gear-shifted on the same principle as described above has a friction element which is released in the operating state when the shifting to the target gear stage is performed and a friction element which is switched from the disengagement state to the operating state, The hydraulic pressure supplied or released according to the deactivation and operation start timing is controlled by the solenoid disposed on the flow passage. Since the role of the solenoid in the transmission plays a very large role, it is important to accurately diagnose the related fault something to do.

However, in the past, there has been no clear logic to diagnose an open failure on the high-side side with respect to the control solenoid of the transmission. Therefore, in the past, even if an open failure actually occurs on the high side of the control solenoid, the related failure information can not be confirmed.

Accordingly, the present invention proposes a method for enabling a high-side open failure diagnosis of a control solenoid for gear shifting in a transmission (or an automatic transmission).

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and an object of the present invention is to provide a high-side open failure diagnosis of a control solenoid for gear change in a transmission (or an automatic transmission) .

According to a first aspect of the present invention, there is provided a method of operating an automatic transmission control device, the method comprising: fixing a high-side switching unit interposed between a driving power source and a plurality of solenoids in an On state A control step of performing gear shifting through a plurality of solenoid controls selectively turning on or off a plurality of low-side switching parts interposed between a solenoid and a ground for each of the plurality of solenoids; A sensing step of sensing whether a short failure occurs in at least a part of the plurality of low side switching parts; And diagnosing an open failure of the high side switching unit when the occurrence of a short fault is detected in the at least a part.

Advantageously, the high side switching unit and the low side switching unit may include a transistor.

Preferably, the diagnosis of the fault can be diagnosed as an open failure of the high-side switching unit only when the state in which the occurrence of the short fault is detected in the at least a part is maintained for a predetermined time or more.

Advantageously, said at least a portion may be more than a majority of said plurality of low side switching parts.

In order to achieve the above object, according to a second aspect of the present invention, there is provided an automatic shift control apparatus for controlling an on-state of a high-side switching unit interposed between a driving power source and a plurality of solenoids, A shift control unit for performing the gear shift through the plurality of solenoid controls selectively turning on or off a plurality of low side switching units interposed between the grounds; A failure detection unit for detecting whether a short failure occurs in at least a part of the plurality of low side switching units; And a failure diagnostic unit diagnosing an open failure of the high side switching unit when the occurrence of a short failure is detected in the at least a part.

Preferably, the failure diagnosis unit can diagnose an open failure of the high side switching unit only when a state in which the occurrence of a short fault is detected in the at least a part is maintained for a predetermined time or more.

Advantageously, said at least a portion may be more than a majority of said plurality of low side switching parts.

Therefore, according to the automatic transmission control device and the operation method of the automatic transmission control device of the present invention, it is possible to perform high-side open failure diagnosis of the control solenoid for gear shift in the transmission (or automatic transmission) Can be obtained.

1 is a partial block diagram of a vehicle including an automatic shift control device according to a preferred embodiment of the present invention.
2 is a block diagram showing the configuration of an automatic transmission control device according to a preferred embodiment of the present invention.
3 is a control flowchart showing an operation method of the automatic shift control device according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

First, referring to FIG. 1, a vehicle including the automatic shift control device according to a preferred embodiment of the present invention will be described briefly as the role of the automatic shift control device.

1, an automatic transmission control device 100 according to the present invention includes an automatic transmission control device 100 that includes a vehicle 200 that rotates a wheel 30 based on an engine output torque generated by the engine 10, .

In particular, the automatic transmission control device 100 according to the present invention is preferably included in an automatic transmission vehicle (or an automatic transmission vehicle). Hereinafter, the automatic transmission vehicle 200 and the vehicle 200 will be described together for convenience of explanation.

That is, in the automatic transmission vehicle 200, the transmission control unit (TCU) determines the transmission speed of the vehicle 200 based on necessary parameters such as the running speed of the vehicle 200, the accelerator pedal sensor (APS: Accelerator Pedal Sensor) (For example, upshift or downshift) by controlling the solenoid of the transmission 20 (or the automatic transmission) (hereinafter, the control solenoid) in accordance with all the shift conditions and controlling the hydraulic pressure.

The transmission 20 that is gear-shifted to the same principle as the above has a friction element that is released from the operating state when the shifting to the target gear position is performed and a friction element that is changed from the disengagement state to the operating state, The hydraulic pressure supplied or released in accordance with the disengagement of the friction elements and the operation start timing is controlled by the solenoid disposed on the oil passage. Since the role of the solenoid in the transmission 20 plays a very large role, It will be important to diagnose correctly.

However, in the prior art, there is no clear logic to diagnose an open failure on the high-side side with respect to the control solenoid of the transmission 20.

Accordingly, the present invention proposes a method of enabling a high-side open failure diagnosis of a control solenoid for gear shift in the transmission (20).

Therefore, the automatic transmission control device 100 of the present invention, which will be described below in detail, is an apparatus for realizing a scheme for enabling a high-side open failure diagnosis of a control solenoid in the transmission 20 .

Since the present invention relates to a high-side open failure diagnosis of the control solenoid in the transmission 20, for the sake of convenience of explanation, the detailed and detailed structure and configuration in the transmission 20 The control solenoid in the transmission 20, and the high side and the low side of the control solenoid will be mainly described.

The automatic transmission control device 100 according to the present invention is configured to fix the high side switching part 22 interposed between the driving power source Vcc and the plurality of solenoids 24 in the On state, A shift control unit 110 for performing gear shifting through control of a plurality of solenoids 24 selectively turning on or off a plurality of low side switching units 26 interposed between solenoids and ground, A fault detection unit 120 for detecting whether or not a short fault occurs in at least a part of the low side switching unit 26 and a fault detection unit 120 for detecting the occurrence of a short fault in at least a part of the low side switching unit 26, ) Fault diagnosis unit 130 for diagnosing a fault.

Here, the plurality of solenoids 24 will be control solenoids for gear shifting in the transmission 20.

2, four solenoids S1, S2, S3, and S4 are connected to a control solenoid for gear shifting in the transmission 20, that is, a plurality of solenoids 24, The following description will be made by way of example.

It is also assumed that a plurality of solenoids 24 are provided with four solenoids S1, S2, S3 and S4 as described above. In correspondence thereto, a plurality of low-side switching units 26 are provided with four solenoids S1, S2, S3, S4), four low side switching parts interposed between the solenoid and the ground will be provided.

At this time, each low-side switching unit in the high-side switching unit 22 and the plurality of low-side switching units 26 includes a transistor (Transister).

For example, as shown in FIG. 2, the high side switching part 22 may include a FET device TR_h as a transistor, and each low side switching part in the plurality of low side switching parts 26 may be a transistor (TR_11, TR_12, TR_13, TR_14).

2, a control solenoid or a plurality of solenoids 24 is provided in the transmission 20, and a high side is connected to a driving power source Vcc and a plurality of solenoids 24 on the basis of the plurality of solenoids 24, Means a high side switching part 22 interposed between the solenoids 24 and means a plurality of low side switching parts 26 interposed between the respective solenoids S1, S2, S3 and S4 and the ground on the low side can do.

Of course, it is of course only one embodiment that the high side switching part 22 is composed of one transistor, that is, TR_h, and that the high side switching part 22 can be constituted by a larger number of FET elements or various kinds of transistors .

In addition, it is only one embodiment that each low side switching part in the plurality of low side switching parts 26 is constituted by one transistor, that is, TR_l 1, TR_l 2, TR_l 3, TR_l 4, and each low side switching part has a larger number of FET elements It would also be possible to have various kinds of transistors.

Hereinafter, for convenience of explanation, the configuration of FIG. 2 will be described below.

The transmission control unit 110 is a functional unit that controls the transmission 20 to automatically perform gear shifting (e.g., upshift or downshift).

That is, the shift control section 110 sets the target gear position (for example, 4 (zero)) in accordance with all-speed shift conditions based on necessary parameters such as the running speed of the vehicle 200, the accelerator pedal position sensor APS, And controls the control solenoid of the transmission 20, that is, the plurality of solenoids 24, so as to shift the gear from the present gear stage (for example, third stage) to the target gear stage (For example, upshift or downshift) automatically.

Hereinafter, a process of controlling the plurality of solenoids 24 in the state where the target gear stage (for example, the fourth stage) is determined will be described briefly.

Basically, the transmission control unit 110 fixes the control solenoid, that is, the high side or high side switching unit 22 of the plurality of solenoids 24 in an On state, The plurality of solenoids 24 are controlled by selectively turning on or off the respective low side switching units TR_l 1, TR_l 2, TR_l 3 and TR_l 4 in the plurality of low side switching units 26 to perform gear shifting.

The reason for controlling the plurality of solenoids 24 by turning on and off the low side is that the voltage magnitude of the switching signal for turning on or off each of the low side switching units TR_l 1, TR_l 2, TR_l 3, and TR_l 4 is high- Off control of the low side is relatively easy because it is lower than the voltage magnitude of the switching signal for turning on / off the TR_h of the part 22.

More specifically, the shift control unit 110 holds (stores) a control algorithm that is preset based on various parameters learned for gear shifting to a target gear stage (for example, four gear stages) .

Thus, the shift control unit 110 sets a control algorithm for the gear shift to the target gear stage (for example, the fourth stage) while keeping the TR_h of the high side switching unit 22 in the ON state as described above The plurality of solenoids 24 are controlled by selectively turning on or off the respective low side switches TR_l 1, TR_l 2, TR_l 3 and TR_l 4 in the plurality of low side switching units 26, The gear shift to the target gear stage (for example, the fourth gear stage) can be performed.

The failure detection unit 120 detects whether or not a short failure occurs in at least a part of the plurality of low side switching units 26. [

Here, at least a part means more than a majority of the number of the low side switching parts 26. [

That is, as shown in FIG. 2, if the plurality of low-side switching units 26 are provided with four low-side switching units TR_l1, TR_12, TR_l3 and TR_l4, at least a part of the four low- Or more (three or four).

In other words, the failure detection unit 120 determines whether or not a short failure occurs in at least a part or three or more of the respective low side switching units TR_l 1, TR_l 2, TR_l 3, and TR_l 4 in the plurality of low side switching units 26 To detect.

At this time, the method of detecting the short fault can be adopted among the existing detection methods.

For example, when the transmission control unit 110 turns off the low-side switching units TR_11, TR_12, TR_13, and TR_14 in the plurality of low-side switching units 26, If there is a low side switching section to be held, the failure detecting section 120 can detect that a short failure has occurred in the low side switching section.

The fault diagnosis unit 130 detects a fault in the low side switching unit of at least some (for example, three or more of the four) of the plurality of low side switching units 26 as a result of detection by the fault detection unit 120 If an occurrence is detected, an open failure of the high side switching unit 22 is diagnosed.

Specifically, when an open failure occurs in the high-side switching unit 22, the supply of the driving power supply Vcc is interrupted, and at least some of the solenoids 24 connected to the plurality of low- A short to ground fault occurs. The failure diagnosis unit 130 may inevitably detect the occurrence of a short fault from the more than half of the solenoids 24 connected to the plurality of low side switching units 26 to the ground, An open failure of the high side switching unit 22 is diagnosed because it can be regarded that an open failure has occurred somewhere in the wiring.

Here, the failure diagnosis unit 130 may be configured such that a state in which the occurrence of a short fault is detected in a low side switching unit of a majority (for example, three or more out of four) of the plurality of low side switching units 26, (For example, 200 ms), it is possible to diagnose an open failure of the high side switching unit 22, thereby further improving the reliability of diagnosis.

Here, it is preferable that the predetermined time (for example, 200 ms) is a value changeable according to the learning result through the test.

The automatic transmission control device 100 of the present invention includes the transmission control unit 110, the failure detection unit 120 and the failure diagnosis unit 130 and is integrally provided with the transmission control unit TCU However, it may be a separate device (module) based on communication with the transmission control unit (TCU) including only the failure detection unit 120 and the failure diagnosis unit 130.

As described above, the automatic transmission control device 100 according to the present invention proposes a new method for diagnosing the high side open failure due to the short failure of the low side of the control solenoid for gear shift in the transmission ( This makes it possible to accurately grasp the fault information and to expect the effect to be prepared.

Hereinafter, an operation method of the automatic transmission control device according to a preferred embodiment of the present invention will be described in detail with reference to FIG.

The method for operating the automatic transmission control device 100 according to the present invention controls the transmission 20 to automatically perform a gear shift (e.g., upshift or downshift) (S100).

That is, the method for operating the automatic shift control device 100 according to the present invention is a method for operating the automatic shift control device 100 according to all the shift conditions based on necessary parameters such as the running speed of the vehicle 200, the accelerator pedal position sensor APS, the opening ratio of the throttle valve, The control solenoid of the transmission 20, that is, the plurality of solenoids (for example, the fourth stage) is shifted from the present gear stage (for example, third stage) (For example, upshift or downshift) by controlling the hydraulic pressure by controlling the hydraulic pressure.

Hereinafter, a process of controlling the plurality of solenoids 24 in the state where the target gear stage (for example, the fourth stage) is determined will be described briefly.

Basically, the method of operating the automatic transmission control device 100 according to the present invention is a method in which the control solenoid, that is, the high side or high side switching part 22 of the plurality of solenoids 24 is turned on And the plurality of solenoids 24 are controlled in such a manner that the low side switching parts TR_l 1, TR_l 2, TR_l 3 and TR_l 4 in the low side switching part 26 are selectively turned on or off, Thereby performing gear shifting.

More specifically, the operation method of the automatic transmission control device 100 according to the present invention is pre-set based on various parameters learned for gear shifting to a target gear stage (for example, four stages) Control algorithm is stored (stored).

The method of operating the automatic shift control device 100 according to the present invention is a method in which the target gear position (for example, four gears) is selected while the TR_h of the high side switching unit 22 is fixed to the ON state, TR_l2, TR_l3, and TR_l4 in the plurality of low side switching units 26 in accordance with the control algorithm for gear shifting to the plurality of solenoids 24 by selectively turning on or off the low side switching units TR_l1, TR_l2, TR_l3, , And the hydraulic pressure is controlled through the control of the plurality of solenoids 24 to perform the gear shift to the target gear stage (for example, the fourth stage).

The operation method of the automatic transmission control device 100 continuously detects whether a short failure occurs in at least a part of the plurality of low side switching units 26 (S110).

Here, at least a part means more than a majority of the number of the low side switching parts 26. [

That is, as shown in FIG. 2, if the plurality of low-side switching units 26 are provided with four low-side switching units TR_l1, TR_12, TR_l3 and TR_l4, at least a part of the four low- Or more (three or four).

In other words, an operation method of the automatic transmission control device 100 according to the present invention is a method of operating the automatic transmission control device 100 in which at least a part of each of the low side switching parts TR_l 1, TR_l 2, TR_l 3 and TR_l 4 in the plurality of low side switching parts 26, In order to continuously detect whether or not a short fault occurs.

In the operation method of the automatic transmission control device 100 according to the present invention, when the occurrence of a short fault is detected in three or more of the low-side switching units 26 among the plurality of low-side switching units 26 in step S110, (E.g., 200 ms) (S120).

Accordingly, in the method of operating the automatic transmission control device 100 according to the present invention, a state in which the occurrence of a short fault is detected in three or more low side switching units of the plurality of low side switching units 26 is a predetermined time (for example, 200 ms Side switching unit 22 can be regarded as an open failure somewhere in the wiring associated with the high side switching unit 22, (open) failure (S130).

Of course, in the method of operating the automatic transmission control device 100 according to the present invention, when the occurrence of a short fault is not detected at three or more of the low side switching parts 26 among the plurality of low side switching parts 26 (S110 No) If the state in which three or more low side switching units of the low side switching unit 26 detects occurrence of a short fault is not maintained for a predetermined time (for example, 200 ms) (No at S120), the opening of the high side switching unit 22 open) will be recognized as a failure-free state.

As described above, the operation method of the automatic transmission control device 100 according to the present invention is a new method for diagnosing the high side open failure due to the short failure of the low side of the control solenoid for gear shift in the transmission (Realization), it is possible to accurately grasp the fault information and anticipate the effect to be prepared.

It should be understood that the functional operations and subject matter implementations described herein may be implemented as digital electronic circuitry, or may be embodied in computer software, firmware, or hardware, including the structures disclosed herein, and structural equivalents thereof, . Implementations of the subject matter described herein may be implemented as one or more computer program products, i. E. One or more modules relating to computer program instructions encoded on a type of program storage medium for execution by, or control of, the operation of the processing system Can be implemented.

The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of matter that affects the machine readable propagation type signal, or a combination of one or more of the foregoing.

As used herein, the term " system "or" device "encompasses any apparatus, apparatus, and machine for processing data, including, for example, a programmable processor, a computer or a multiprocessor or computer. The processing system may, in addition to the hardware, comprise code that forms an execution environment for a computer program upon request, such as, for example, code comprising a processor firmware, a protocol stack, a database management system, an operating system, .

A computer program (also known as a program, software, software application, script or code) may be written in any form of programming language, including compiled or interpreted language, a priori or procedural language, Components, subroutines, or other units suitable for use in a computer environment. A computer program does not necessarily correspond to a file in the file system. The program may be stored in a single file provided to the requested program, or in multiple interactive files (e.g., a file storing one or more modules, subprograms, or portions of code) (E.g., one or more scripts stored in a markup language document). A computer program may be deployed to run on multiple computers or on one computer, located on a single site or distributed across multiple sites and interconnected by a communications network.

On the other hand, computer readable media suitable for storing computer program instructions and data include semiconductor memory devices such as, for example, EPROM, EEPROM and flash memory devices, such as magnetic disks such as internal hard disks or external disks, Non-volatile memory, media and memory devices, including ROM and DVD-ROM disks. The processor and memory may be supplemented by, or incorporated in, special purpose logic circuits.

Implementations of the subject matter described herein may include, for example, a back-end component such as a data server, or may include a middleware component, such as an application server, or may be a web browser or a graphical user, for example a user, who may interact with an implementation of the subject- Front-end components such as client computers with interfaces, or any combination of one or more of such back-end, middleware, or front-end components. The components of the system may be interconnected by any form or medium of digital data communication, such as, for example, a communications network.

While the specification contains a number of specific implementation details, it should be understood that they are not to be construed as limitations on the scope of any invention or claim, but rather on the description of features that may be specific to a particular embodiment of a particular invention Should be understood. Likewise, the specific features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented in multiple embodiments, either individually or in any suitable subcombination. Further, although the features may operate in a particular combination and may be initially described as so claimed, one or more features from the claimed combination may in some cases be excluded from the combination, Or a variant of a subcombination.

It is also to be understood that although the present invention is described herein with particular sequence of operations in the drawings, it is to be understood that it is to be understood that it is to be understood that all such illustrated acts have to be performed or that such acts must be performed in their particular order or sequential order, Can not be done. In certain cases, multitasking and parallel processing may be advantageous. Also, the separation of the various system components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and systems will generally be integrated together into a single software product or packaged into multiple software products It should be understood that

As such, the present specification is not intended to limit the invention to the specific terminology presented. Thus, while the present invention has been described in detail with reference to the above examples, those skilled in the art will be able to make adaptations, modifications, and variations on these examples without departing from the scope of the present invention. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

According to the automatic shift control device and the operation method of the automatic shift control device according to the present invention, high-side open failure diagnosis of a control solenoid for gear shift in a transmission (or an automatic transmission) The invention is not limited to the use of related technologies but merely has a possibility of being marketed or operated, and is practically usable because it can be practically carried out in reality. .

10: Engine
20: transmission
30: Wheels
100: Automatic shift control device
110: Transmission control unit 120:
130:

Claims (7)

A method of operating an automatic shift control device for performing gear shifting,
A high-side switching unit interposed between a driving power source and a plurality of solenoids is fixed in an on state, and a plurality of low-side switching units interposed between a solenoid and a ground for each of the plurality of solenoids, side switching unit to selectively turn on or off the solenoid control unit;
A sensing step of sensing whether a ground to short fault occurs in at least a part of the solenoids connected to the plurality of low side switching parts; And
And diagnosing an open failure of the high side switching unit when a short fault is detected to occur at a fault of more than half of the solenoids to ground. The method according to claim 1,
The high-side switching unit and the low-
Wherein the automatic transmission control device includes a transistor (Transister). The method according to claim 1,
In the failure diagnosis step,
And diagnosing the open failure of the high side switching unit only when a state in which the occurrence of a short fault is detected in a majority of the solenoids is maintained for a predetermined time or more. delete 1. An automatic shift control device for performing a gear shift, comprising:
A plurality of solenoids for selectively turning on / off a plurality of low-side switching units interposed between the solenoid and the ground for each of the plurality of solenoids, and a high-side switching unit interposed between the driving power source and the plurality of solenoids, A gear shift control unit for performing the gear shift through solenoid control;
A failure detection unit for detecting whether a short failure occurs in at least a part of the solenoids connected to the plurality of low side switching units to the ground; And
And a failure diagnosis unit diagnosing an open failure of the high side switching unit when a short fault is detected in a state where at least a majority of the solenoids are grounded. 6. The method of claim 5,
The fault diagnosis unit,
And diagnoses the open failure of the high side switching unit only when a state in which the occurrence of a short fault is detected in at least half of the solenoids is maintained for a predetermined time or more. delete

Images