KR19980027061A - Stabilization Control Device and Method of Automatic Transmission - Google Patents

Abstract

The present invention is to provide reliability in the operation by stabilizing the interaction between the main controller and the auxiliary controller in the TCU that controls the selection of the shift stage and the shift mode according to the respective driving conditions detected in the automatic transmission.

According to the present invention, when the trigger signal of the reset signal output means is detected according to the start of the engine, the main controller and the auxiliary controller enter the shift control mode to set the synchronization of the shift stage according to the detected driving condition, and the synchronization of the shift stage. During the setting process, the main controller detects whether an error occurs in the detection of disturbance or execution of the operation program.If an abnormality is detected in the main controller, the main controller executes the initialization and sends a command for the initialization to the auxiliary controller. Determining whether the auxiliary controller has performed the initialization, and if the auxiliary controller is initialized, recovering the error program and proceeding to the shift mode to synchronize the shift stage according to the detected driving condition. Controllers do not interact with each other unless there is a real problem. The poisoning proceeds normally and reliability is provided for stabilization of the automatic transmission.

Description

Stabilization Control Device and Method of Automatic Transmission

The present invention relates to an automatic transmission, and more particularly, to provide reliability in the operation by stabilizing the mutual operation between the main controller and the auxiliary controller in the TCU that controls the selection of the shift stage and the shift mode according to each driving condition detected. It relates to a stabilization control device and method of an automatic transmission.

In general, a vehicle equipped with an automatic transmission controls hydraulic pressure flowing into each clutch and brake side of the transmission within a transmission range set according to the opening rate of a throttle valve that adjusts the traveling speed of the vehicle and the amount of intake air. Allows the shift gear of the target shift stage to be operated automatically.

The automatic transmission is fixed to three speeds of the vehicle's gear stages so that the vehicle can be stably operated to the repair shop in the event of a major failure in the respective detection means and the TCU itself. Stabilization means have been proposed.

However, although the main controller inside the TCU may recognize the abnormality of each external element that detects a condition for driving in the stabilization device, the main controller itself cannot determine the failure of the main controller itself.

Therefore, as shown in FIG. 3 attached to the conventional automatic transmission as a stabilization means, a reset circuit section 10 for outputting a trigger signal for setting shift mode execution when the engine of the vehicle is started, and the reset circuit section Inverter 20 for inverting and outputting the signal output from 10, Main controller 31 for controlling the overall operation for shift control according to the opening degree and vehicle speed of the detected throttle valve, and the main controller 31 After detecting the output stage signal and the speed of the vehicle, it is determined whether the main controller 31 is abnormal, and when the abnormality occurs, the output of the shift control signal of the main controller 31 is shut off, The gear is fixed at three speeds, and the main controller 31 and the watch dog are mutually watched to detect whether there is an abnormality, and when an abnormality is detected, the speed is increased to three speeds. It consists of the TCU 30 which consists of the auxiliary controller 32 which determines, and the resistor R1 (R2) which forms the output of the inverter 20 in the predetermined state which the controller of the TCU 30 needs.

In the conventional automatic transmission stabilization device as described above, the trigger signal output from the reset circuit unit 10 when the engine is turned on to start driving the current limiting resistor R1 after the waveform is shaped through the inverter 20. It is stabilized by R2 and applied to the main controller 31 and the subordinate controller 32 in the TCU 30.

Accordingly, the main controller 31 and the sub-controller 32 in the TCU 30 control the shift duty for selection of the shift stage according to the running speed of the vehicle and the opening ratio of the throttle valve applied from the respective detection means. Proceed.

As described above, the main controller 31 may exit from the program currently being executed and re-execute from the beginning due to the influence of various disturbances (ESD) in the state of selecting the shift stage, or may be abnormal during the execution of the program. It is detected and resets itself after the initial program.

At this time, since the watchdog message transmitted from the main controller 31 to the subordinate controller 32 is transmitted with data having a different period from that in the normal shift mode, the subordinate controller receives data of a different period from the main controller 31. The control unit 32 determines that the main controller 31 is abnormal and blocks the output of the signal for shift control of the main controller 31 and at the same time fixes the shift stage at three speeds through the hydraulic control means.

Subsequently, the auxiliary controller 32 displays the diagnostic code and the abnormal code according to the message detected by the watchdog and stores them in the memory means.

Therefore, when the stabilization device of the conventional automatic transmission as described above is re-executed shift control after being initialized due to disturbance or its abnormality during the operation of the main controller, the auxiliary controller detects the value of the external detection means and the watchdog. As the difference in the value of the main controller is detected, the shift stage is fixed at three speeds.

At this time, even after restarting after starting off, the diagnostic code and the error message are continuously set in the memory means and the 3-speed fixed and self-diagnostic codes are continuously output. There was a problem that the reliability is deteriorated in the determination of the failure can not be accurately recognized.

In addition, if the shift stage is fixed at three speeds due to the initialization of the main controller, the driver will replace the TCU after putting the car in a maintenance shop, causing excessive expense and loss of time due to a minor program error. There was a problem.

The present invention has been made in view of the above-described problems, and an object thereof is to initialize or disturb an error of its own program during execution of an operation in which a main controller detects a reset signal due to engine start-up and selects a shift stage. When initialized by the main controller, the sub-controller outputs a reset signal for initialization execution to synchronize the synchronization between the subordinate controller and the main controller, and then execute shift control, thereby preventing actual failure of the main controller and the subordinate controller. Unless the watchdogs work normally, they provide reliability for the shifting process.

A feature of the present invention for achieving the above object is a reset signal output means for outputting a trigger signal for executing the shift mode during the engine movement in the automatic transmission,

First inverting means for inverting and outputting the signal of the reset signal output means;

And shift control means for controlling the overall operation of the duty and the hydraulic control for the selection of the shift stage in accordance with each condition detected during operation.

In addition, the present invention is a self-diagnostic method of the automatic transmission,

When the trigger signal of the reset signal output means is detected according to the start of the engine, the main controller and the auxiliary controller enter the shift control mode to set synchronization of the shift stage according to the detected driving condition;

The main controller detects whether an error occurs in the detection of disturbance or execution of an operation program,

When an abnormality is detected in the primary controller, performing initialization and simultaneously transmitting a command to the secondary controller to determine whether the secondary controller has performed initialization;

When the auxiliary controller is initialized, the process may include recovering an error program and synchronizing the shift stage according to the detected driving condition by performing the shift mode.

1 is a block diagram of a stabilization control device of an automatic transmission according to an embodiment of the present invention;

FIG. 2 is a flowchart illustrating an embodiment of performing stabilization control of the TCU in the present invention shown in FIG.

3 is a block diagram of a stabilization control device of an automatic transmission provided in a conventional vehicle.

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

As can be seen in Figure 1, the stabilization apparatus of the automatic transmission according to the present invention is a reset circuit unit 10, the first inverter 20, TCU 30, the second inverter 40, the third inverter 50 And the NOA gate 60, the reset circuit section 10 outputs a reset trigger signal for executing shift mode progression when the engine is started by the ignition key.

The first inverter 20 inverts and shapes the trigger signal in a predetermined state for executing the shift mode progression applied from the reset circuit unit 10 and outputs the trigger signal.

The TCU 30 includes a main controller 31 and an auxiliary controller 32, and the main controller 31 is disturbed during the overall operation and shift mode of the shift control according to the opening degree and the vehicle speed of the detected throttle valve. Or when a reset is made due to an abnormality of an internal program, a reset signal for its own initialization is output, and the auxiliary controller 32 detects an output terminal signal of the main controller 31 and the speed of the vehicle to determine whether the main controller 31 is abnormal. When the abnormality occurs, the output of the shift control signal of the main controller 31 is interrupted and the hydraulic control signal is interrupted and the shift stage is fixed at three speeds. It proceeds to detect whether there is an abnormality, and when an abnormality is detected, the shift stage is fixed at three speeds.

The second inverter 40 inverts and outputs an initialization signal applied by the main controller 31 of the TCU 30 and a power-on reset signal applied through the first inverter 20.

The third inverter 50 inverts the signal applied through the second inverter 40 and applies it as an initialization signal to the auxiliary controller 32 through the resistor R10.

The NOA gate 60 performs a negative logical multiplication on data of a diagnostic message or an error code output from the main controller 31 and the auxiliary controller 32 in the TCU 30, and then outputs a predetermined signal.

Referring to the operation of the present invention having the function as described above is as follows.

If the start of the engine is detected by the reset circuit unit 10 while the engine is turned off, the reset circuit unit 10 outputs a trigger signal to shape the waveform through the first inverter 20 and then the current limiting resistor R1. It is stabilized through) and is applied to the main controller 31 and the auxiliary controller 32 in the TCU 30 (step 101).

The main controller 31 and the sub-controller 32 in the TCU 30 enter the shift control mode according to the trigger signal applied, and shift according to the vehicle speed and the opening rate of the throttle valve applied from the respective detection means according to the operation. The duty control and the hydraulic solenoid valve for synchronizing the stages are adjusted (step 102).

In the state in which the selection control of the shift stage is executed in accordance with the respective conditions detected in this way, the main controller 31 detects whether an external disturbance or an error occurs in the execution of the operation of the program from the outside (step 103).

When the operation of the program or the disturbance from the outside is not detected in step 103, the main controller 31 and the auxiliary controller 32 in the TCU 30 execute a watchdog to each other to monitor each other for abnormality between the controllers. If an abnormality is detected in the execution of the operation of the program, the main controller 31 performs the initialization and outputs data for the initialization execution, inverts the data through the second inverter 40, and then restarts the data through the third inverter 50. It inverts and transfers to the auxiliary controller 32 side (step 104).

Thereafter, the main controller 31 analyzes the signal applied through the watchdog to determine whether the auxiliary controller 32 has entered the initialization (step 105).

If the auxiliary controller 32 has been initialized in step 105, the error program is corrected and the shift mode is entered (step 106).

Subsequently, the main controller 31 and the sub-controller 32 execute the control for synchronizing the shift stages according to the vehicle speed and the opening rate of the throttle valve applied from the respective detection means, and continuously execute the watchdogs with each other. Proceeds to step 107.

If an abnormality in the external detection means occurs and is detected by the main controller 31 and the subordinate controller 32, the main controller 31 and the subordinate controller 32 output a signal of the abnormal code to both ends of the noah gate 60. Since the NOR gate 60 performs a logical sum negation operation on the applied signal, the NOR gate 60 outputs a high level signal to fix the shift stage at three speeds and stores the abnormal code in the memory means of the diagnostic apparatus.

As described above, in the stabilization apparatus of the automatic transmission according to the present invention, when the main controller is initialized due to disturbance or program error during the shift control of the main controller, the main controller outputs data for initialization to the auxiliary controller. By synchronizing the auxiliary controller with the main controller, the watchdog proceeds normally with each other as long as there is no substantial abnormality, thereby providing reliability for stabilizing the automatic transmission.

Claims (7)

An automatic transmission comprising: reset signal output means for outputting a trigger signal for executing shift mode progression at engine start-up; First inverting means for inverting and outputting the signal of the reset signal output means; And a shift control means for controlling the overall operation of the duty and hydraulic pressure control for selecting the shift stage in accordance with respective conditions detected during operation. The method according to claim 1, wherein the shift control means is reset according to the overall operation for the shift control in accordance with the detected opening degree and the vehicle speed of the shift control and the initialization of its initialization when the shift mode is initialized due to disturbance or abnormality of the internal program. A main controller for outputting a signal, After detecting the output signal of the main controller and the detected driving condition, it is determined whether the main controller is abnormal or not, and when the abnormality is detected, the output of the shift control signal of the main controller is cut off and the hydraulic control signal is cut off. Stabilization control device of the automatic transmission, characterized in that consisting of an auxiliary controller for fixing the gear stage to three speed. The method of claim 2, wherein the main controller and the auxiliary controller proceeds with each other to detect whether there is an error between each other, and when an abnormality is detected to fix the shift stage at three speeds and at the same time to store the diagnostic code in the memory means Stabilization control device of an automatic transmission, characterized in that. The display apparatus of claim 2, further comprising: second inverting means for inverting and outputting an initialization signal applied from the main controller and a power on reset signal applied from the first inverting means; And a third inverting means for reversing the signal applied through the second inverting means and applying it as an initialization signal to the auxiliary controller side through a resistance. The stabilization control of an automatic transmission according to claim 2, further comprising logic operation means for outputting a predetermined signal after performing a logical sum negation operation on data of a diagnostic message or an error code output from the main controller and the auxiliary controller. Device. In the self-diagnosis method of the automatic transmission, A first process of setting the synchronization of the gear stage according to a driving condition detected by the main controller and the auxiliary controller when the trigger signal of the reset signal output means is detected according to the start of the engine; In the process of the first process, the main controller is a second process for detecting whether an error occurs in the detection of disturbance or the execution of the operation program; A third step of determining whether or not the auxiliary controller has performed an initialization after the initialization is executed and a command for the initialization execution is transmitted to the auxiliary controller when the controller detects an abnormality in the second process; And a fourth process of synchronizing the shift stage according to the detected driving condition by restoring an error program and performing a shift mode when the auxiliary controller is initialized in the third process. . The method of claim 6, wherein if the error of the program is not detected in the second process or the restoration of the error program is completed and the normal shift control mode is executed, the main controller and the auxiliary controller execute a mutual watchdog. Stabilization control method.