KR20180073399A - Method and device for synchronization of wet double clutch transmission - Google Patents

Abstract

Disclosed are a method and an apparatus for synchro-fastening a wet double clutch transmission, wherein the method comprises the following steps of: allowing a control unit to control oil pressure as predetermined initial oil pressure so as to fasten a synchro-mechanism; allowing the control unit to increase a flow rate so as to reduce pre-sync impacts; and allowing the control unit to control the flow rate and the oil pressure so as to fasten the synchro-mechanism.

Description

TECHNICAL FIELD [0001] The present invention relates to a synchronous double clutch transmission, and more particularly,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a synchronizing method for synchronizing a wet type double clutch transmission and an apparatus therefor, and more particularly, to a synchronizing method and a synchronizing method for a wet type double clutch transmission in which a flow amount and an oil pressure are independently controlled at the time of synchronizing.

Generally, the vehicle is provided with a speed change device for adjusting the speed of the vehicle during driving. Such a shift device is classified into a manual shift device operated by a driver and an automatic shift device automatically shifted in accordance with the running speed of the vehicle.

At this time, as an automatic transmission, a double clutch transmission (DCT) having two power transmission clutches has been developed.

Generally, the double clutch transmission selectively transmits the rotational force input from the engine to two input sides using two clutches, and outputs the rotational force using the rotational force of the gear disposed on the two input sides.

The above-described double-clutch transmission is developed and applied in various forms according to each automobile manufacturer. Currently, a 5-speed automatic transmission is generally used, and the improvement of the fuel efficiency and the use of the engine driving force improve the power performance 6-speed and 7-speed automatic transmissions have been realized.

That is, in the double clutch transmission, the first, third and fifth gears are connected to the first clutch, and the second, fourth and sixth gears are connected to the second clutch, so that the shift of the double clutch transmission The first clutch and the second clutch are alternately transmitted to the flywheel so that the shift is performed.

Hereinafter, the shifting process of the double clutch transmission will be briefly described.

First, the shift to the first speed using the rotational force of the engine ENT is performed by synchronizing the first speed gear and the first output side through the sleeve of the first synchromesh mechanism and then operating the first clutch, . When the vehicle speed is increased in the first speed state and the speed is to be shifted to the second speed, the second speed gear and the first power transmitting side are synchronized through the sleeves of the second synchromesh mechanism in the first speed state, When the second clutch is operated while disengaging the clutch, the shift is made to the second speed.

That is, as in the shifting process of the first speed and the second speed, the synchromesh mechanism connects the gear of the corresponding speed change stage to the corresponding power transmitting side and alternately operates the first clutch and the second clutch, .

However, when the flow rate and the hydraulic pressure are controlled so as not to match the hardware characteristics in the above-described synchro locking process, there is a problem in that an impact may occur in synchro synchronization or delay of switching may occur.

As a background technique of the present invention, there is a "double clutch drive method for an automatic transmission ", which is registered in Korean Registered Patent No. 10-0716626 (registered on May 3, 2007).

According to an aspect of the present invention, there is provided a synchronous double-clutch transmission for a wet double clutch transmission, which is designed to solve the above-mentioned problems, And an object thereof is to provide a fastening method and apparatus therefor.

According to an aspect of the present invention, there is provided a synchronizing method for a wet type double clutch transmission, comprising: controlling a hydraulic pressure to a predetermined initial hydraulic pressure to engage a synchromesh mechanism; Decreasing the pre-sync impact by increasing the flow rate of the control unit; And controlling the flow rate and the hydraulic pressure of the control unit, respectively, to thereby clamp the synchromesh mechanism.

In the step of increasing the flow rate of the present invention to reduce the pre-sync impact, the control unit opens the flow rate valve of the oil controller and increases the flow rate until it is pre-synchronized.

In the step of fastening the synchromesh mechanism of the present invention, the control unit keeps the flow rate constant.

In the step of fastening the synchromesh mechanism of the present invention, the control unit increases the hydraulic pressure so that the synchromesh mechanism can be fastened.

In the step of tightening the synchromesh mechanism of the present invention, the control unit increases the hydraulic pressure to a predetermined slope so that the synchromesh mechanism is synchronized, applies the hydraulic pressure to bring the sleeve into contact with the clamping teeth, And the hydraulic pressure is applied so that it can move.

The present invention is characterized in that the control unit further includes a releasing step of releasing the flow rate and the hydraulic pressure according to whether or not the synchromesh mechanism is determined to be engaged.

According to another aspect of the present invention, a synchromesh mechanism for a wet type double clutch transmission includes a synchromesh mechanism for selectively engaging a plurality of driving gears and a plurality of driven gears engaged with the driving gears, respectively; An oil controller for controlling at least one of a flow rate and an oil pressure for operating the synchromesh mechanism; And a control unit for independently controlling the flow rate and the hydraulic pressure through the oil controller so that the synchromesh mechanism can be fastened.

In the present invention, the control unit adjusts the hydraulic pressure to a predetermined initial hydraulic pressure to tighten the synchromesh mechanism, increases the flow rate to reduce the pre-squeeze impact, and then controls the flow rate and hydraulic pressure to tighten the synchromesh mechanism .

In the present invention, the control unit may increase the flow rate until the flow valve of the oil controller is opened before being pre-synchronized to reduce the pre-squeeze impact.

In the present invention, the controller may increase the oil pressure while keeping the flow rate constant through the oil controller, thereby tightening the synchromesh mechanism.

In the present invention, the controller may increase the hydraulic pressure to a predetermined slope such that the synchromesh mechanism is synchronized, apply the sleeve of the synchromesh mechanism so as to be in contact with the clamping teeth, and then adjust the hydraulic pressure so that the sleeve can move to the final position via the clamping teeth .

The method and apparatus for synchronizing a wet type double clutch transmission according to an embodiment of the present invention can independently control the flow rate and the hydraulic pressure in accordance with the hardware characteristics at the time of the synchro locking so that the synchro can be smoothly engaged, It is possible to reduce the impact, prevent the delay of the engagement time, and improve the synchromesh.

1 is a block diagram showing a synchromesh device for a wet type double clutch transmission according to an embodiment of the present invention.
2 is a flowchart for explaining a synchro locking method of a wet type double clutch transmission according to an embodiment of the present invention.
3 is a synchro tightening flow chart for explaining a synchro fastening method of a wet type double clutch transmission according to an embodiment of the present invention and its apparatus.

Hereinafter, a method of fastening a synchronous screw of a wet type double clutch transmission according to an embodiment of the present invention and its apparatus will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a block diagram showing a synchromesh device for a wet type double clutch transmission according to an embodiment of the present invention. FIG. 3 is a block diagram illustrating a synchronizing method for a wet type double clutch transmission according to an embodiment of the present invention and its apparatus And the synchronous fastening device of the wet type double clutch transmission will be described with reference to the same.

1, a synchromesh device for a wet type double clutch transmission according to an embodiment of the present invention includes a control unit 100, an oil controller 200, and a pump driving unit 300, Operates a synchromesh mechanism (30) for selectively engaging a plurality of driving gears (10) and a plurality of driven gears (20) engaged with the driving gear (10).

A wet type double clutch transmission according to an embodiment of the present invention includes a main input shaft (not shown), a first input shaft (not shown), a second input shaft (not shown), a first clutch (Not shown) by being engaged with the driving gear 10 and the driving gear 10 corresponding to the number of teeth of the wet type double clutch transmission, respectively, and rotated by the second clutch (not shown) A reverse gear (not shown), a first output shaft (not shown), and a second output shaft corresponding to the number of the drive gears 10 for outputting rotational power to the output shaft.

At this time, the main input shaft is arranged to receive the rotational force of the engine (not shown), and the first input shaft is arranged to be rotatable on the rotational center line of the main input shaft. Further, the second input shaft is disposed so as to be rotatable on the rotation center line of the main input shaft around the first input shaft. That is, the first input shaft and the second input shaft are formed on the outer circumferential surface of the main input shaft so as to selectively receive the rotational power of the main input shaft. Here, the rotational force input from the engine is selectively transmitted to the first input shaft and the second input shaft by controlling the first clutch and the second clutch, and is transmitted through the first input shaft and the second input shaft, .

Accordingly, when the first clutch is operated, the rotational force of the main input shaft is transmitted to the first input shaft, and when the second clutch is operated, the rotational force of the main input shaft is transmitted to the second input shaft.

On the other hand, the odd-numbered drive gear 10 among the plurality of drive gears 10 may be formed on the first input shaft, and the even-numbered drive gear 10 may be formed on the second input shaft.

A plurality of driven gears 20 for selectively shifting and outputting the rotational force of the plurality of drive gears 10 are formed and a synchromesh mechanism 30 is disposed between the plurality of driven gears 20.

At this time, the synchromesh mechanism (30) selectively transmits the rotational force of any one of the plurality of driven gears (20) to the first output shaft. Here, a plurality of synchromesh mechanisms 30 may also be provided to selectively transmit the rotational force of any one of the plurality of driven gears 20 to the first output shaft.

Next, referring to the synchromesh mechanism 30, a plurality of synchromesh mechanisms 30 may be provided in the dual clutch transmission (DCT) according to the present embodiment.

That is, the synchromesh mechanism 30 can engage two of the gears belonging to one clutch (the first clutch or the second clutch). For example, in the case of the 7-stage DCT, each of the 2-6 gear, the 4-R gear, the 1-7 gear, and the 3-5 gear may be paired, and the synchromesh mechanism 30 may exist for each pair . At this time, the control unit 100 can control the respective synchromesh mechanisms 30 through the pump driving unit 300. FIG.

The operation of the synchromesh mechanism 30 will be described in more detail. The synchromesh mechanism 30 can have three states. That is, there are two states in which one of the two gears is engaged in a neutral state in which none of the gears is engaged. For example, the synchromesh mechanism 30 corresponding to the 2-6 gears has a neutral state in which both the No. 2 and No. 6 gears are not engaged, the No. 2 gear is engaged, and the No. 6 gear is engaged . More specifically, if the synchro position of the 2-6 synchro-gear is 0 (mm), it is a neutral state. If it is -8 (mm), the second gear is engaged. Lt; / RTI >

Although not shown in the drawing, a position sensor (not shown) may be included in the synchromesh mechanism 30 to detect the position of the synchromesh mechanism 30, and the controller 100 may detect the synchronized position detected through the position sensor The control of the pump driving unit 300 can be performed.

That is, the control unit 100 determines the state of the synchromesh mechanism 30, operates the pump driving unit 300 to move the synchromesh 30 to the left and right, and controls the flow valves 210, So that the flow rate and hydraulic pressure supply from the pump driving unit 300 can be interrupted through at least one of the hydraulic valves 220.

Therefore, the control unit 100 can control the flow rate and the hydraulic pressure to operate the synchromesh mechanism 30 through the oil controller 200 and the pump driving unit 300. [

Here, the oil controller 200 includes a flow valve 210 and a hydraulic valve 220, and is a body valve capable of opening and closing the flow valve 210 and the hydraulic valve 220. The flow rate valve 210 is a valve capable of adjusting the amount of oil supplied from the pump driving unit 300, and may be a solenoid valve. In addition, the hydraulic valve 220 may be a solenoid valve that can regulate the pressure of oil supplied from the pump driving unit 300. In particular, in the present embodiment, a purge control solenoid valve (PCSV) .

At this time, the control unit 100 may independently control the flow rate valve 210 and the hydraulic pressure valve 220 so that the synchromesh mechanism 30 may be engaged.

The pump driving unit 300 can be driven at all times for the piston operation and can supply the clutch oil. That is, when oil is supplied to the pump driving unit 300, the oil pressure and the flow rate are controlled through the oil controller 200, and the oil pressure and flow rate of the oil can be variably controlled according to the operation of the shift lever.

The control unit 100 independently controls the flow rate and the hydraulic pressure through the oil controller 200 so that the synchromesh mechanism 30 can be fastened. The control unit 100 sets the hydraulic pressure to a predetermined initial oil pressure The flow rate is increased to reduce the pre-squeeze impact, and then the flow rate and the hydraulic pressure are respectively controlled so that the synchromesh mechanism 30 can be tightened.

Next, in order to facilitate the tightening of the synchromesh mechanism 30, a synchro tightening sequence of the wet type double clutch transmission according to the present embodiment shown in Fig. 3 will be described in more detail.

As shown in FIG. 3, the control unit 100 may control the hydraulic pressure and the flow rate through the oil controller 200 for different fastening of the synchromesh mechanism 30 according to PHASE 0-5, respectively.

First, in the initial phase (PHASE 0), the control unit 100 forms the hydraulic pressure through the pump driving unit 300 before starting the flow control. That is, the control unit 100 drives the pump driving unit 300 to supply oil, but does not control the flow rate, but forms only the oil pressure (see c-Q①).

In the next step (PHASE 1), the control section 100 may increase the flow rate to reduce the pre-sync impact. That is, in order to perform the pre-sync control of the synchromesh mechanism 30, the flow valve 210 is opened. As the flow valve 210 is opened, oil is supplied (see b-Q?) And the control unit 100 increases the flow rate at a predetermined slope until the synchromesh mechanism 30 is pre-synched (see b-G? 1) . Therefore, the control unit 100 gradually increases the flow rate, thereby reducing the impact due to the pre-sync. At this time, the control unit 100 can determine that the synchromesh mechanism 30 is located at a specific position in the pre-sync state of the synchromesh mechanism 30 (see a-D?). For example, the specific position may refer to a position when the sleeve included in the synchromesh mechanism 30 is in contact with the blocker. At this time, after the initial hydraulic pressure is formed, the hydraulic pressure is maintained in a reduced state (see c-Q (2)), and the flow valve 210 is opened to increase a certain slope as the flow rate increases.

In the next step (PHASE 2), the control unit 100 controls the flow rate and the oil pressure through the oil controller 200 so that the synchromesh mechanism 30 is synchronized. At this time, the controller 100 can increase the flow rate by a predetermined amount (see b-Q) through the flow rate valve 210, and then maintain the flow rate constant. This is to reduce the control variable by keeping the flow rate constant when controlling the hydraulic pressure. The controller 100 increases the hydraulic pressure at a predetermined slope so that the synchromesh mechanism 30 is synchronized through the hydraulic valve 220 (see c-G②).

In the next step (PHASE 3), the control unit 100 applies the oil pressure so that the sleeve of the synchromesh mechanism 30 comes into contact with the clamping teeth through the hydraulic valve 220 (see c-G③). At this time, the controller 100 can keep the flow rate constant.

In the next step (PHASE 4), the controller 100 controls the hydraulic valve 220 to apply the hydraulic pressure so that the sleeve can move to the final position via the clamping teeth (see c-G?). At this time, the controller 100 can keep the flow rate constant. That is, the controller 100 can determine that the synchromesh mechanism 30 is fully engaged when the sleeve moves to the final position (see a-D4) through the clamping teeth.

In the present embodiment, the position of the synchromesh mechanism 30 is detected through the position sensor included in the synchromesh mechanism 30 to determine the state of the synchromesh mechanism 30, Any method that can be used is possible, but is not limited to this.

In the last step (PHASE 5), the control section 100 can release the flow rate and the hydraulic pressure according to whether or not the synchromesh mechanism 30 is determined to be engaged. That is, after the control unit 100 has fastened the synchromesh mechanism 30, the oil controller 200 can be controlled to reduce the flow rate and the oil pressure in order to reduce the engagement shock. In other words, the control unit 100 may close the flow valve 210 and the hydraulic valve 220, respectively, so that the flow rate and the hydraulic pressure are not supplied any more.

FIG. 2 is a flowchart for explaining a synchronizing method of a wet type double clutch transmission according to an embodiment of the present invention. Referring to FIG. 2, a synchronizing method of a wet type double clutch transmission will be described as follows.

As shown in FIG. 2, in the synchro fastening method of the wet type double clutch transmission according to the embodiment of the present invention, the control unit 100 forms the initial hydraulic pressure through the pump driving unit 300 (S100).

That is, the control unit 100 adjusts the oil pressure to a predetermined initial oil pressure in order to engage the synchromesh mechanism 30. In other words, the control unit 100 drives the pump driving unit 300 to supply the oil to form the oil pressure before starting the flow control, but does not control the flow rate but forms only the oil pressure.

Next, the control unit 100 performs a pre-sync control for increasing the flow rate through the flow rate valve 210 to reduce the pre-sync impact (S200).

That is, the control unit 100 may increase the flow rate until the flow valve 210 of the oil controller 200 is opened and then pre-synchronized. At this time, the controller 100 maintains the hydraulic pressure state that was initially formed before the start of the flow rate control and does not perform the hydraulic pressure control, but the hydraulic pressure rises slightly as the flow rate valve 210 is opened.

At this time, the control unit 100 can determine that the synchromesh mechanism 30 is located at a specific position in the pre-sync state of the synchromesh mechanism 30. [ For example, the specific position may refer to a position when the sleeve included in the synchromesh mechanism 30 is in contact with the blocker.

Next, the control unit 100 controls the flow rate and the hydraulic pressure through the oil controller 200 to fasten the synchromesh mechanism 30 (S300).

That is, the control unit 100 increases the hydraulic pressure through the hydraulic valve 220 so that the synchromesh mechanism 30 can be fastened, and the flow rate can be kept constant. This is to reduce the control variable by keeping the flow rate constant when controlling the hydraulic pressure.

The controller 100 controls the hydraulic valve 220 so that the synchromesh mechanism 30 is synchronized with the flow rate kept constant so that the hydraulic pressure is increased to a predetermined slope and the sleeve of the synchromesh mechanism 30 The hydraulic pressure can be continuously applied so that the sleeve can move to the final position via the clamping teeth.

At this time, the controller 100 can determine whether or not the synchromesh mechanism 30 is fastened through the position when the sleeve has moved to the final position via the clamping teeth.

That is, the control unit 100 can control the oil controller 200 according to whether the synchromesh mechanism 30 is engaged or not, thereby releasing the flow rate and hydraulic pressure. That is, after the control unit 100 tightens the synchromesh mechanism 30, it is possible to reduce the flow rate and the hydraulic pressure for reducing the engagement shock.

As described above, in the synchronous fastening method and apparatus for a wet type double clutch transmission according to an embodiment of the present invention, when the synchronous fastening is performed, the flow rate and the hydraulic pressure are independently controlled according to the hardware characteristics, Thus, it is possible to reduce the impact at the time of the synchro locking, to prevent the delay of the locking time, and to improve the synchromesh.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Accordingly, the true scope of the present invention should be determined by the following claims.

10: drive gear
20: driven gear
30: Synchro mechanism
100:
200: Oil controller
210: Flow valve
220: Hydraulic valve
300:

Claims (11)

Controlling the hydraulic pressure to a predetermined initial hydraulic pressure to engage the synchromesh mechanism;
Decreasing the pre-sync impact by increasing the flow rate of the control unit; And
And controlling the flow rate and the hydraulic pressure of the control unit so as to connect the synchromesh mechanism.
The method according to claim 1,
In the step of increasing the flow rate to reduce the pre-
Wherein the control unit opens the flow rate valve of the oil controller and increases the flow rate until it is pre-synchronized.
The method according to claim 1,
In the step of fastening the synchromesh mechanism,
Wherein the control unit maintains a constant flow rate. ≪ RTI ID = 0.0 > 18. < / RTI >
The method according to claim 1,
In the step of fastening the synchromesh mechanism,
Wherein the controller increases the hydraulic pressure so that the synchromesh mechanism can be engaged with the synchromesh mechanism.
5. The method of claim 4,
In the step of fastening the synchromesh mechanism,
Wherein the controller applies the hydraulic pressure so that the sleeve can move to the final position via the clamping teeth after increasing the hydraulic pressure to a certain slope such that the synchromesh mechanism is synchronized and applying the hydraulic pressure such that the sleeve contacts the clamping teeth, Connecting method of the double clutch transmission.
The method according to claim 1,
Further comprising a release step of releasing the flow rate and the hydraulic pressure according to whether or not the synchromesh mechanism is determined to be engaged by the control unit.
A synchromesh mechanism for selectively engaging a plurality of drive gears and a plurality of driven gears engaged with the drive gears;
An oil controller for controlling at least one of a flow rate and an oil pressure for operating the synchromesh mechanism; And
And a control unit for independently controlling the flow rate and the hydraulic pressure through the oil controller to enable the synchromesh mechanism to be engaged.
8. The method of claim 7,
Wherein the controller controls the hydraulic pressure to a predetermined initial hydraulic pressure to tighten the synchromesh mechanism, increases the flow rate to reduce the pre-squeeze impact, and then controls the flow rate and hydraulic pressure to tighten the synchromesh mechanism. Synchronizing control device for a transmission of a double clutch.
9. The method of claim 8,
Wherein the controller opens the flow rate valve of the oil controller and increases the flow rate until it is pre-synchronized to reduce the pre-squeeze shock.
9. The method of claim 8,
Wherein the control unit increases the hydraulic pressure while keeping the flow rate constant through the oil controller to tighten the synchromesh mechanism.
11. The method of claim 10,
The control unit increases the hydraulic pressure to a predetermined slope so that the synchromesh mechanism is synchronized and applies a hydraulic pressure so that the sleeve can move to the final position via the clamping teeth after applying the sleeve of the synchromesh mechanism to contact the clamping teeth Of the first and second clutches.

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