KR102078539B1 - Method and apparatus for diagnosing asynchronization of dual clutch transmission of vehicle - Google Patents

Abstract

The present invention discloses a method and apparatus for asynchronous diagnosis of a dual clutch transmission. According to the present invention, the first time from when the hooking function of the second pulse width modulation signal is executed to the first time when the third pulse width modulation signal is finished and the second time when the fourth pulse width modulation signal is finished and the hooking function is executed. If the sum is less than the third time from the hooking function execution time of the second pulse width modulation signal to the hooking function execution time of the fourth pulse width modulation signal, the pulse width modulation signal is non-synchronized. When synchronized, the PWM generator initializes the pulse width modulated signal asynchronously without a large load, and essentially eliminates asynchronous noise caused by the pulse width modulated signal. It is possible to further improve the reliability.

Description

Asynchronous diagnosis method and apparatus of a dual clutch transmission {METHOD AND APPARATUS FOR DIAGNOSING ASYNCHRONIZATION OF DUAL CLUTCH TRANSMISSION OF VEHICLE}

The present invention relates to a method and apparatus for asynchronous diagnosis of a dual clutch transmission, and more particularly, to a method for removing radiation noise generated by asynchronous pulse width modulation signals supplied to a clutch and a shaft of a transmission of a dual clutch. It is about.

In general, an automatic transmission for a vehicle includes a shift control device that automatically adjusts a shift ratio according to a vehicle's driving speed and a load, and such a shift control device has a large number according to a vehicle's driving speed, an opening ratio of a throttle valve, and various detection conditions. By controlling the oil pressure by controlling the solenoid valve of the, the gear shift of the target shift stage is operated to make the shift automatically.

That is, the target shift stage is determined from the shift pattern map table in which the shift control device is set according to the driving speed of the vehicle and the opening ratio of the throttle valve, and the duty for controlling the target shift stage is determined by the engine speed, the coolant temperature, the intake temperature, and the transmission. It is extracted in consideration of correction factors such as oil temperature, and operates a plurality of actuators (solenoid valves) with the extracted duty to operate a plurality of operating elements consisting of a clutch and a brake to automatically shift to a target shift stage. .

The automatic transmission operated according to the operation principle has a friction element that is deactivated in the operating state and a friction element that is converted from the deactivated state when the shift to each target shift stage is executed. The transmission performance of the automatic transmission is determined by the deactivation of the element and the timing of its start.

In addition, the shift control apparatus for controlling a dual clutch transmission having two clutches and two shafts for transmitting power includes the respective clutches 1, 2 and shafts 1 and 2 shown in FIG. 1 for shifting of the respective target shift stages. As shown, the pulse width modulated signal PWM is generated and driven in accordance with the generated pulse width modulated signal so that each of the clutches 1, 2 and the shafts 1, 2 rotates at the speed set by the target shift stage.

However, when the pulse width modulated signals of the clutches 1 and 2 and the shafts 1 and 2 are not accurately synchronized and provided, emission noise occurs due to the asynchronous operation of the pulse width modulated signals.

That is, in the frequency spread spectrum technique, a hooking function for changing the period of the pulse width modulated signal for each end point of the pulse width modulated signal for one clutch is executed to detect asynchronous to the pulse width modulated signal.

However, if the pulse width modulation signals of clutches 1 and 2 and shafts 1 and 2 are synchronized, the frequency of the pulse width modulation signals of clutch 1 should be the same as the pulse width modulation signals of clutch 1 when the frequency of the pulse width modulation signals of clutch 1 is 16 kHz. As shown in FIG. 1, the shaft 1 is supplied with the same frequency as the pulse width modulation signal of the clutch 1 after the pulse width modulation signal of the clutch 1 and the predetermined delay time have passed.

In other words, in the case of using the pulse width modulation spread spectrum technique, the four pulse width modulation signals reduce the probability of unsynchronization. However, as the load load of the microprocessor controlling the pulse width modulation signal increases, the hooking function is applied to the pulse width modulation signal. When the cycle is executed, the probability of asynchronous occurrence of the pulse width modulated signal is increased.

In addition, as the hooking function execution time becomes slow, the pulse width modulated signal of the next shaft or clutch is not supplied, thereby causing asynchronous to the pulse width modulated signal.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to determine whether the pulse width modulated signal generated by the delay of the hooking function execution time is asynchronous or not. Diagnosis is performed based on the hooking function execution time of the second clutch, the pulse width modulation signal end time of the second clutch, the pulse width modulation signal end time of the second shaft, and the hooking function execution time of the second shaft. The purpose of the present invention is to provide an asynchronous diagnosis method of a dual clutch transmission that can fundamentally eliminate the radiation noise caused by the asynchronous to the pulse width modulated signal by simply detecting the asynchronous to the pulse width modulated signal by initializing the control device. .

Asynchronous diagnosis method of the dual clutch transmission according to the first aspect of the present invention for achieving the above object,

In the asynchronous diagnosis method of the dual clutch transmission that shifts to the target shift stage in accordance with the duty of the pulse width modulation signal sequentially supplied to at least one clutch and shaft,

Receiving a plurality of pulse width modulated signals sequentially supplied to each clutch and shaft,

Dual clutch based on the time when the hooking function of the second pulse width modulation signal and the end of the third pulse width modulation signal, the time of generating the fourth pulse width modulation signal and the time of execution of the hooking function of the plurality of pulse width modulation signals Diagnosing the asynchronous response to the pulse width modulated signal of the transmission;

And initializing a shift control apparatus for generating a pulse width modulated signal upon asynchronous determination of the pulse width modulated signal.

Preferably the pulse width modulation signal asynchronous diagnosis step,

The first time from the time when the hooking function of the second pulse width modulation signal is executed to the end time of the third pulse width modulation signal and the second time from the end time of the fourth pulse width modulation signal to the time when the hooking function is executed. And when the sum is less than a third time from the hooking function execution time of the second pulse width modulation signal to the hooking function execution time of the fourth pulse width modulation signal, it is arranged to determine asynchronously to the pulse width modulation signal. do.

Preferably, the pulse width modulation signal asynchronous diagnosis step,

The first time from the time when the hooking function of the second pulse width modulation signal is executed to the end time of the third pulse width modulation signal and the second time from the end time of the fourth pulse width modulation signal to the time when the hooking function is executed. And if the sum is not less than a third time from when the hooking function of the second pulse width modulation signal is executed to the hooking function of the fourth pulse width modulation signal, the synchronization is performed with respect to the pulse width modulation signal. It is done.

Asynchronous diagnosis device of the dual clutch transmission according to the second aspect of the present invention for achieving the above object,

A shift control unit for synchronizing and transmitting a plurality of pulse width modulated signals sequentially to at least one clutch and shaft;

Including a dual clutch transmission that rotates the clutch and the shaft according to the control of the shift control to shift to the target gear stage,

The shift control unit,

A PWM generator for generating a plurality of pulse width modulated signals supplied to each clutch and shaft;

Dual clutch based on the time when the hooking function of the second pulse width modulation signal and the end of the third pulse width modulation signal, the time of generating the fourth pulse width modulation signal and the time of execution of the hooking function of the plurality of pulse width modulation signals An asynchronous diagnosis unit for diagnosing asynchronous to the pulse width modulated signal of the transmission;

The pulse width modulation signal supplied to the clutch and the shaft is characterized in that it further comprises an asynchronous controller for initializing the PWM generator.

As described above, the asynchronous diagnosis method and apparatus of the dual clutch transmission according to the embodiment of the present invention may include a first time from the time at which the hooking function of the second pulse width modulation signal is executed to the end time of the third pulse width modulation signal. The sum of the second time periods from the end of the fourth pulse width modulation signal to the time of executing the hooking function is the sum of the time from the execution of the hooking function of the second pulse width modulation signal to the time of execution of the hooking function of the fourth pulse width modulation signal. If it is less than 3 hours, the pulse width modulated signal is asynchronously determined and the pulse width modulated signal is unsynchronized. The PWM generator initializes the pulse width modulated signal. It can fundamentally eliminate the radiation noise caused by the asynchronous to the width modulation signal, further improving the reliability of the dual clutch transmission It is obtained an effect that.

The following drawings, which are attached in this specification, illustrate the preferred embodiments of the present invention, and together with the detailed description of the present invention which serves to further understand the technical spirit of the present invention, the present invention includes matters described in such drawings. It should not be construed as limited to.
1 is a waveform diagram showing a pulse width modulation signal supplied to each clutch and shaft of a general dual clutch transmission.
2 is a view showing the configuration of a dual clutch transmission according to an embodiment of the present invention.
3 is a waveform diagram showing a pulse width modulation signal supplied to each clutch and shaft of a dual clutch transmission according to an exemplary embodiment of the present invention.
4 is a flowchart illustrating an asynchronous diagnosis process of a dual clutch transmission according to another embodiment of the present invention.

DETAILED DESCRIPTION In order to fully understand the present invention, the operational advantages of the present invention, and the objects attained by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents set forth in the drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

2 is a diagram illustrating an asynchronous diagnosis device of a dual clutch according to an exemplary embodiment of the present invention, and FIG. 3 is a waveform diagram illustrating a pulse width modulation signal supplied to each clutch and shaft illustrated in FIG. 2. An asynchronous diagnosis device of a dual clutch transmission according to an embodiment of the present invention will be described by way of example only with reference to the asynchronous diagnosis device for the pulse width modulated signal shown in FIGS. 2 and 3.

In the asynchronous diagnosis apparatus of the dual clutch to which the embodiment of the present invention is applied, the pulse width modulation signal generation time and the hooking function execution time of the first shaft of the first shaft among the asynchronous pulse pulse modulation signals generated when the execution time of the hooking delay is delayed. And pulse width modulation signal generated when the pulse width modulation signal is generated from the second clutch and the pulse width modulation signal generation time and the hooking function execution time of the second shaft. It has a configuration to initialize the signal.

That is, as shown in Figure 2, the shift control apparatus of the automatic transmission according to an embodiment of the present invention when the current driving state of the vehicle from the various sensors forming the engine control detection unit 10 is input to the ECU (20) The ECU 20 controls the engine control driver 30 by comparing the information with the previously input data and controlling the engine in an optimal state.

At the same time, the ECU 20 sends information to the shift control unit 40 (hereinafter referred to as TCU) if the information necessary for shift control is performed so that the shift control is performed. In this case, the TCU and the information transmitted from the ECU 20 By comparing the information input from the shift control detecting unit 50 with the previously stored data and controlling the shift control driving unit 60, the optimum shift control is achieved.

In the above, the engine control detection unit 10, as is known, all information necessary for engine control such as vehicle speed sensor, crank angle sensor, engine speed sensor, coolant temperature sensor, turbine speed sensor, throttle position sensor, etc. The shift control detecting unit 50 refers to sensors that provide information necessary for shift control such as an input / output speed sensor, an oil temperature sensor, an inhibitor switch, a brake switch, and the like.

In addition, the engine control driving unit 30 means all driving units for engine control, and the shift control driving unit 60 means all solenoid valves applied to the hydraulic control means of the automatic transmission.

Here, the shift control driver 60 has a dual clutch, that is, two clutches that are directly connected or terminated by the hydraulic control means to transfer power generated by the engine control driver 30 to the shift control driver 60. It includes two shafts that rotate in response to the power transmitted by the two clutches.

In the exemplary embodiment of the present invention, a dual clutch transmission having two clutches has been described as an example. However, it will be apparent to a publicly known art that the present invention is applicable to a multi-stage clutch transmission having a plurality of clutches.

In such a control system, it is ideal for the hydraulic control system to smoothly change the rotational speed of the turbine in controlling the engagement and release of the clutch of the friction element.

That is, the TCU 40 generates the first to fourth pulse width modulation signals PWM1 to PWM4 for driving the two clutches CL1 and CL2 and the shafts SH1 and SH2 of the shift control driver 60. Perform asynchronous diagnosis on the generated first to fourth pulse width modulation signals PWM1 to PWM4, and initialize the pulse width modulation signal PWM generation unit when asynchronous diagnosis is determined for the pulse width modulation signal. do.

The TCU 40 may include a PWM generator 41 generating first to fourth pulse width modulated signals corresponding to a predefined target speed change stage for executing predefined hydraulic control, and the PWM signal PWM1. The asynchronous diagnosis unit 43 for diagnosing whether the PWM4 is asynchronous or the pulse width modulation signal PWM1-PWM4 of the PWM generator 41 when the PWM signal is asynchronous as a result of the diagnosis of the asynchronous diagnosis unit 43. It is provided to initialize.

Here, the pulse width modulation signals PWM1 to PWM1 supplied to the clutches CL1 and CL2 and the shafts SH1 and SH2 are as shown in FIG. 3.

Referring to FIG. 3, the first pulse width modulation signal PWM1 is a control signal for controlling the first clutch CL1, and the second pulse width modulation signal PWM2 controls the first shaft SH1. The third pulse width modulated signal PWM3 is a control signal for controlling the second clutch CL2, and the fourth pulse width modulated signal PWM4 is a control signal for controlling the second shaft SH2. This is a control signal.

The PWM generator 41 generates each pulse width modulated signal in synchronization with the same frequency, and the generated pulse width modulated signals PWM1-PWM4 are supplied to the asynchronous diagnosis unit 43, and the asynchronous diagnosis unit 43 is provided. Diagnose asynchronous with respect to the received first to fourth pulse width modulation signals (PWM1-PWM4).

That is, the asynchronous diagnosis unit 43 executes a hooking function for changing the period of the pulse width modulation signal at each end point of each pulse width modulation signal PWM1-PWM4, and ends and hooks each executed pulse width modulation signal. Diagnosis is performed on the pulse width modulated signal (PWM1-PWM4) based on the function execution time.

Referring to FIG. 3, the first time t1 and the fourth pulse width modulation signal PWM4 from the hooking function execution time of the second pulse width modulation signal PWM2 to the end of the third pulse width modulation signal PWM3. ) The sum t1 + t2 of the second time t2 from the end time until the hooking function execution time of the fourth pulse width modulation signal PWM4 is executed from the execution time of the hooking function of the second pulse width modulation signal PWM2. If the fourth pulse width modulated signal PWM4 is less than the third time t3 until the hooking function execution time, the asynchronous diagnosis unit 43 determines asynchronously to the pulse width modulated signal and the pulse width modulated signal The asynchronous determination result is supplied to the asynchronous control unit 45.

The asynchronous controller 45 initializes the PWM generator 41 when asynchronous determination is made on the pulse width modulated signal.

The hooking function executed by the asynchronous diagnosis unit 43 changes the period of the pulse width modulated signal at each end point of each pulse width modulated signal PWM1-PWM4 and changes the frequency spectrum of the changed pulse width modulated signal. As a process of determining whether or not the asynchronous to the pulse width modulated signal based on, since it is a known technique well known by those skilled in the art, a detailed description thereof will be omitted.

The asynchronous diagnosis process of the dual clutch transmission according to the embodiment of the present invention by the above configuration will be described with reference to FIG. 4.

First, the PWM generator 41 generates the first to fourth pulse width modulation signals PWM1-PWM4 supplied to each of the clutches CL1 and CL2 and the shafts SH1 and SH2 shown in FIG. 3 (step 101).

The PWM is generated by the asynchronous diagnosis unit 43 based on a hooking function execution time point at which an end time point of the generated first to fourth pulse width modulation signals PWM1 to PWMM4 is executed later, and an end time point of the pulse width modulation signal. Whether or not asynchronous to the pulse width modulated signal of the generator 41 is diagnosed.

That is, the asynchronous diagnosis unit 43 may perform the first time t1 and the fourth time from the time when the hooking function of the second pulse width modulation signal PWM2 is executed to the end time of the third pulse width modulation signal PWM3. The sum of the second time t2 from the end of the pulse width modulation signal PWM4 to the execution time of the hooking function of the fourth pulse width modulation signal PWM4 is executed by the hooking function of the second pulse width modulation signal PWM2. It is determined whether it is smaller than the third time t3 from the time point until the hooking function execution time of the fourth pulse width modulation signal PWM4 (step 103).

The asynchronous diagnosis unit 43 determines asynchronously when the sum t1 + t2 of the first time and the second time is smaller than the third time t3 as a result of the determination in step 103, and the asynchronous control unit ( 45) (step 105).

The asynchronous controller 45 initializes the PWM generator 41 when the pulse width modulated signal is determined to be asynchronous as a result of the determination of the asynchronous diagnosis unit 43 (step 107).

However, if the sum (t1 + t2) of the first time and the second time is not less than the third time (t3) as a result of the determination in step 103, it is determined that the pulse width modulated signal is synchronized, the pulse width modulated signal The asynchronous control unit 45, which has received the determination result of synchronizing the synchronously, maintains the pulse width modulated signal of the current PWM generator 41 (steps 109 and 111).

Thereafter, the asynchronous control unit 45 determines whether the shift is completed, and when the shift is completed as a result of the determination, terminates the present program and proceeds to step 101 when the shift is not finished (step 113).

According to an exemplary embodiment of the present invention, a first time from a hooking function execution time of the second pulse width modulation signal to an end timing of the third pulse width modulation signal and a hooking function execution time from the end of the fourth pulse width modulation signal. When the sum of the second time intervals is less than the third time from the hooking function execution time of the second pulse width modulation signal to the hooking function execution time of the fourth pulse width modulation signal, it is determined asynchronously to the pulse width modulation signal. If the pulse width modulated signal is unsynchronized after the PWM generator is initialized, it is possible to easily detect the unsynchronized pulse width modulated signal without heavy load, and fundamentally eliminate the radiation noise due to the asynchronous pulse modulated signal. It is possible to further improve the reliability of the dual clutch transmission.

Although the present invention has been described in detail with reference to preferred embodiments, the present invention is not limited to the above-described embodiments, and the technical field to which the present invention belongs without departing from the gist of the present invention as claimed in the following claims. Anyone skilled in the art will have the technical idea of the present invention to the extent that various modifications or changes are possible.

The sum of the first time from the time at which the hooking function of the second pulse width modulation signal is executed to the end of the third pulse width modulation signal and the second time from the end of the fourth pulse width modulation signal to the time at which the hooking function is executed If it is less than the third time from when the hooking function of the second pulse width modulation signal is executed to the hooking function of the fourth pulse width modulation signal, the pulse width modulation signal is unsynchronized. In this case, by initializing the PWM generator, it is possible to easily detect the asynchronous to the pulse width modulated signal without a large load, and fundamentally eliminate radiation noise due to the asynchronous to the pulse width modulated signal. In terms of accuracy and reliability of operation of the asynchronous diagnostic device and method of the dual clutch transmission to further improve the reliability Because it can lead to a very great advance in efficiency performance, as well as a sufficient possibility of a commercially available or open degree of the vehicle is applied to apparently conducted in reality the invention there is industrial applicability.

Claims (4)

In the asynchronous diagnosis method of the dual clutch transmission that shifts to the target shift stage in accordance with the duty of the pulse width modulation signal sequentially supplied to at least one clutch and shaft,
Receiving a plurality of pulse width modulated signals sequentially supplied to each clutch and shaft,
Dual clutch based on the time of the hooking function of the second pulse width modulation signal and the end of the third pulse width modulation signal, and the time of generating the fourth pulse width modulation signal and the execution of the hooking function of the plurality of pulse width modulation signals Diagnosing the asynchronous response to the pulse width modulated signal of the transmission;
And initiating a shift control device that generates a pulse width modulated signal when the asynchronous determination of the pulse width modulated signal is performed. The method of claim 1, wherein the pulse width modulation signal asynchronous diagnosis step,
The first time from the time when the hooking function of the second pulse width modulation signal is executed to the end time of the third pulse width modulation signal and the second time from the end time of the fourth pulse width modulation signal to the time when the hooking function is executed. And when the sum is less than a third time from the hooking function execution time of the second pulse width modulation signal to the hooking function execution time of the fourth pulse width modulation signal, the asynchronous to the pulse width modulation signal. Asynchronous diagnosis method of dual clutch transmission. The method of claim 1, wherein the pulse width modulation signal asynchronous diagnosis step,
The first time from the time when the hooking function of the second pulse width modulation signal is executed to the end time of the third pulse width modulation signal and the second time from the end time of the fourth pulse width modulation signal to the time when the hooking function is executed. And if the sum is not less than a third time from the time at which the hooking function of the second pulse width modulation signal is executed to the time at which the hooking function of the fourth pulse width modulation signal is executed, it is determined to be synchronized with the pulse width modulation signal. Asynchronous diagnostic method of dual clutch transmission. A shift control unit for synchronizing and transmitting a plurality of pulse width modulated signals sequentially to at least one clutch and shaft;
Including a dual clutch transmission that rotates the clutch and the shaft according to the control of the shift control to shift to the target gear stage,
The shift control unit,
A PWM generator for generating a plurality of pulse width modulated signals supplied to each clutch and shaft;
Dual clutch based on the time of the hooking function of the second pulse width modulation signal and the end of the third pulse width modulation signal, and the time of generating the fourth pulse width modulation signal and the execution of the hooking function of the plurality of pulse width modulation signals An asynchronous diagnosis unit for diagnosing asynchronous to the pulse width modulated signal of the transmission;
And an asynchronous controller for initializing the PWM generator when the pulse width modulation signals supplied to the clutch and the shaft are asynchronous.

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