JP3620230B2 - Twin clutch type automatic transmission - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a twin-clutch automatic transmission, and more particularly to a twin-clutch automatic transmission that can quickly shift to a reverse speed or the like.
[0002]
[Prior art]
Two clutches connected to the input shaft are provided, the drive gears of the first and third speed stages are arranged on one of the output shafts of the respective clutches, and the drive gears of the second and fourth speed stages are arranged on the other side. A driven gear that meshes with each drive gear is arranged on the transmission output shaft, and the driven gear is arranged to be selectively engageable with the transmission output shaft by the synchronization device, and is synchronized with the two clutches. JP-A-8-93661 discloses a twin-clutch type automatic transmission that changes gears by changing the engagement combination of the devices.
[0003]
In the apparatus of the above publication, the first and third speed stage driven gears are selectively engaged with the transmission output shaft by one first synchronizer, and the second and fourth speed stage driven gears are also one first gear. A two-synchronizer is selectively engaged with the transmission output shaft. A countershaft is arranged in parallel with the output shaft of the clutch, and a countershaft driven gear attached to the countershaft is attached to the output shaft of the clutch provided with the second and fourth speed stage drive gears. Is always meshed with the countershaft drive gear. The reverse gear driven gear disposed on the countershaft is always meshed with the first speed driven gear via the intermediate gear while being selectively engageable with the countershaft by the synchronizing device. Accordingly, the reverse gear is achieved by engaging the second clutch, engaging the reverse gear driven gear with the countershaft with the synchronization device, and engaging the first speed gear driven gear with the transmission output shaft with the first synchronization device. .
[0004]
[Problems to be solved by the invention]
In the twin clutch type automatic transmission configured as described above, for example, in the reverse stage, the shift selector is in the P (parking) range, the N (neutral) range, or the shift selector is forward, for example D or 2 Or it is thought that it selects from the state of the 1st speed stage in L range.
[0005]
Here, in the P range and the N range, the two clutches are both disengaged, so the first synchronizer and the second synchronizer can be in any position, but when selecting the reverse gear If the first speed driven gear is not engaged with the transmission output shaft by the synchronizer, the first synchronizer must be moved for the first speed stage. If the second synchronizer is not in the neutral position, it must be moved to the neutral position (because the reverse gear uses a clutch output shaft to which the second speed drive gear and the fourth speed drive gear are attached, The speed driven gear and the fourth speed driven gear must not be engaged with the transmission output shaft). Then, the reverse gear synchronizer must be moved to the engaged position. It takes time to continuously move the first synchronizer, the second synchronizer, and the reverse gear synchronizer. Further, if the three synchronizers are moved simultaneously, the hydraulic pressure is lowered and the controllability of the synchronizer may be degraded.
[0006]
Considering the case where the first speed stage is shifted to the reverse stage, the first speed driven gear is engaged with the transmission output shaft by the first synchronizer, but the second synchronizer is the second speed gear. If it is moved to the second speed driven gear side in preparation for the stage, it must be moved to an intermediate position. Then, the reverse gear synchronizer must be moved to the engaged position. In this case as well, in order to move the two synchronizers, it takes time as described above, or the hydraulic pressure is lowered and the controllability of the synchronizer may be lowered.
In view of the above problems, the present invention improves the controllability by reducing the movement of the synchronizer when, for example, the reverse gear is selected from the D (N) range in the twin clutch automatic transmission having the above-described configuration. For the purpose.
[0007]
[Means for Solving the Problems]
According to invention of Claim 1, the transmission input shaft connected with the engine via the torque converter,
A first clutch output shaft selectively engaged with a transmission input shaft via a first clutch;
A second clutch output shaft disposed coaxially with the first clutch output shaft and selectively engaged with the transmission input shaft via the second clutch;
A countershaft disposed parallel to the first clutch output shaft and the second clutch output shaft;
A transmission output shaft disposed parallel to the first clutch output shaft and the second clutch output shaft;
A first speed stage drive gear and a third speed stage drive gear fixedly mounted on the first clutch output shaft;
A second speed stage drive gear, a fourth speed stage drive gear, and a countershaft drive gear for rotating the countershaft fixedly mounted on the second clutch output shaft;
A first rotation gear is rotatably disposed on the transmission output shaft and meshes with the first speed stage drive gear and is engaged with the transmission output shaft by the first synchronizer when the first speed stage is selected. A first speed stage driven gear and a third speed stage driven gear meshed with the third speed stage drive gear and engaged with the transmission output shaft by the first synchronizer when the third speed stage is selected;
It is rotatably arranged on the transmission output shaft, and meshes with the drive gear of the second speed stage, and is engaged with the transmission output shaft by the second synchronizer when the second speed stage is selected. A second speed stage driven gear, a third speed stage driven gear meshed with the fourth speed stage drive gear and engaged with the transmission output shaft by the second synchronizer when the fourth speed stage is selected;
A countershaft driven gear fixedly mounted on the countershaft and meshing with the countershaft drive gear;
A reverse drive gear that is rotatably mounted on the countershaft and meshes directly or indirectly with the first speed stage driven gear and is engaged with the subshaft by the third synchronizer when the reverse gear is selected;
P range for stop standby selected by the driver, reverse R range, neutral N range, D range that automatically shifts between the first speed stage and the fourth speed stage for forward movement, the first speed stage And a shift selector having two ranges that automatically shift between the second speed stage and an L range that is fixed to the first speed stage,
The first clutch is released in the P range, the N range, the second speed stage, the fourth speed stage, and the reverse speed stage, and is engaged in the first speed stage and the third speed stage, and the second clutch is in the P range, N Release at the range, the first speed stage, the third speed stage, and engage at the second speed stage, the fourth speed stage, the reverse speed stage,
When the P range and the N range are selected, and at the first speed stage of each forward range, the first synchronizer is positioned at a position where the first driven gear is engaged with the transmission output shaft, Positioning the second synchronizer in an intermediate position, positioning the third synchronizer in a disengaged position;
When the reverse speed is selected from the first speed stage of the P range, the N range, or each range for forward movement, the movement of the synchronizer is only movement for engaging the reverse drive gear of the third synchronizer with the reverse shaft. A twin-clutch automatic transmission is provided.
[0008]
In the twin-clutch automatic transmission configured as described above, both the first clutch and the second clutch are released in the P range and N range of the shift selector, and the first synchronizer is in the first speed stage position. The second synchronizer is positioned at the intermediate position, and the first clutch is engaged and the second clutch is released at the first speed stage of each forward range, The first synchronization device is positioned at a position where the first driven gear is engaged with the transmission output shaft, and the second synchronization device is positioned at an intermediate position. From the above state, when shifting to R, the second clutch is engaged and the first clutch is disengaged. In addition, the third synchronization device is engaged in the reverse drive gear with the reverse drive gear. The reverse gear is achieved only by positioning it in the position.
[0009]
According to the invention of claim 2,A transmission input shaft coupled to the engine via a torque converter;
A first clutch output shaft selectively engaged with a transmission input shaft via a first clutch;
A second clutch output shaft disposed coaxially with the first clutch output shaft and selectively engaged with the transmission input shaft via the second clutch;
A countershaft disposed parallel to the first clutch output shaft and the second clutch output shaft;
A transmission output shaft disposed parallel to the first clutch output shaft and the second clutch output shaft;
A first speed stage drive gear and a third speed stage drive gear fixedly mounted on the first clutch output shaft;
A second speed stage drive gear, a fourth speed stage drive gear, and a countershaft drive gear for rotating the countershaft fixedly mounted on the second clutch output shaft;
A first rotation gear is rotatably disposed on the transmission output shaft and meshes with the first speed stage drive gear and is engaged with the transmission output shaft by the first synchronizer when the first speed stage is selected. A first speed stage driven gear and a third speed stage driven gear meshed with the third speed stage drive gear and engaged with the transmission output shaft by the first synchronizer when the third speed stage is selected;
It is rotatably arranged on the transmission output shaft, and meshes with the drive gear of the second speed stage, and is engaged with the transmission output shaft by the second synchronizer when the second speed stage is selected. A second speed stage driven gear, a third speed stage driven gear meshed with the fourth speed stage drive gear and engaged with the transmission output shaft by the second synchronizer when the fourth speed stage is selected;
A countershaft driven gear fixedly mounted on the countershaft and meshing with the countershaft drive gear;
A reverse drive gear that is rotatably mounted on the countershaft and meshes directly or indirectly with the first speed stage driven gear and is engaged with the subshaft by the third synchronizer when the reverse gear is selected;
P range for stop standby selected by the driver, reverse R range, neutral N range, D range that automatically shifts between the first speed stage and the fourth speed stage for forward movement, the first speed stage And a shift selector having two ranges that automatically shift between the second speed stage and an L range that is fixed to the first speed stage,
The first clutch is released in the P range, the N range, the second speed stage, the fourth speed stage, and the reverse speed stage, and is engaged in the first speed stage and the third speed stage, and the second clutch is in the P range, N Release at the range, the first speed stage, the third speed stage, and engage at the second speed stage, the fourth speed stage, the reverse speed stage,
When the P range and the N range are selected, the first synchronizer is positioned at a position where the first driven gear is engaged with the transmission output shaft, the second synchronizer is positioned at an intermediate position, 3 Position the synchronizer in the disengaged position,
At the first speed stage of each forward range, the first synchronizer is positioned at a position where the first driven gear is engaged with the transmission output shaft, and the second synchronizer is operated by the braking device of the vehicle. When the vehicle braking device is not operated, the vehicle is positioned at the second speed stage position, the third synchronization device is positioned at the disengaged position,
When the reverse speed is selected from the first speed stage of the P range, the N range, or each range for forward movement, the movement of the synchronizer is only movement for engaging the reverse drive gear of the third synchronizer with the reverse shaft. ,
A twin clutch type automatic transmission characterized by the above is provided.
[0010]
In the twin clutch type automatic transmission configured as described above, when the vehicle braking device is operated at the first speed stage of each forward range, the second synchronizer control means is the second synchronizer. Is engaged at the intermediate position and then shifted to R, the second clutch is engaged and the first clutch is released. The third synchronizer is engaged with the reverse drive gear on the countershaft. However, when the vehicle braking device is not operated, the second synchronizer is positioned at the second speed stage position, and then the second speed stage is achieved. When the shift to the second speed stage is requested, the shift is performed only by disengaging the first clutch from the engagement and disengaging the second clutch from the disengagement.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a diagram schematically showing the overall structure of a twin clutch type four-speed automatic transmission with a torque converter to which the present invention is applied. In FIG. 1, 1 is an engine, 2 is a torque converter with a lock-up mechanism, and 3 is a twin clutch type automatic transmission.
As shown in the figure, the output shaft 10 of the engine 1 is connected to the front cover 20 of the torque converter 2, and the front cover 20 is connected via a pump impeller 21 and a turbine 22 connected via a fluid flow, or The output shaft 24 of the torque converter 24 is connected to the input shaft 30 of the twin clutch type automatic transmission 3 so as to be integrally rotatable. In addition, 25 is a stator and 26 is a one-way clutch.
[0012]
The input shaft 30 includes a first clutch input disk C1 of the first clutch C1 constituting the clutch C._i, The second clutch input disk C2 of the second clutch C2_iAre connected.
The first clutch output disk C1 of the first clutch C1_o, Second clutch output disk C2 of the second clutch C2_oThe first clutch output shaft 40 and the second clutch output shaft 50 are coaxially connected to the outside of the input shaft 30, respectively.
The auxiliary shaft 60 and the output shaft 70 are arranged in parallel to these axes.
[0013]
The second clutch output shaft 50 has a second speed drive gear I from the clutch C side.₂, Countershaft drive gear I_S, 4th drive gear I₄Are fixedly connected. On the other hand, the first clutch output shaft 40 has a fourth speed drive gear I.₄Next to the 3rd speed drive gear I₃However, on the torque converter 2 side, the first speed drive gear I₁Are fixedly connected.
[0014]
The output shaft 70 is connected to the second speed drive gear I from the clutch C side.₂Second-speed driven gear O that always meshes with₂, 4th drive gear I₄4th speed driven gear O₄, 3rd speed drive gear I₃3rd speed driven gear O₃, 1st speed drive gear I₁1st speed driven gear O₁However, each is attached rotatably.
[0015]
The first synchronizer D1 includes a first hub H1 fixedly connected to the output shaft 70, and a first sleeve S1 that is slidably mounted in the axial direction on the outer peripheral end portion thereof. The first speed driven gear O is moved by the first sleeve actuator ACT1 via the first shift fork Y1.₁1st clutch gear G fixedly coupled to₁Or 3rd speed driven gear O₃3rd speed clutch gear G fixedly coupled to₃1st speed driven gear O by engaging with₁And 3rd speed driven gear O₃Are selectively coupled to the output shaft 70.
[0016]
Similarly, the second synchronizer D2 includes a second hub H2 fixedly connected to the output shaft 70, and a second sleeve S2 mounted on the outer peripheral end portion so as to be axially slidable. The sleeve S2 is moved by the second sleeve actuator ACT2 via the second shift fork Y2, and the fourth speed driven gear O2 is moved.₄4th speed clutch gear G fixedly coupled to₄Or second speed driven gear O₂Second speed clutch gear G fixedly coupled to₂4th speed driven gear O by engaging with₄And second speed driven gear O₂Are selectively coupled to the output shaft 70.
[0017]
The countershaft 60 is connected to the countershaft drive gear I from the clutch C side._SCountershaft driven gear O that always meshes with_S, 1st speed drive gear I₁And idler gear M_RReverse drive gear I that always meshes via_ROf which the countershaft driven gear O_SIs fixedly coupled to the countershaft 60 and always rotates integrally with the countershaft 60, but the reverse drive gear I_RIs rotatably attached and is selectively coupled to the countershaft 60 as described below by a third synchronizer D3 disposed between the two gears.
[0018]
The third synchronizer D3 includes a third hub H3 fixedly connected to the auxiliary shaft 60, and a third sleeve S3 that is slidably mounted in the axial direction on the outer peripheral end portion thereof. It is moved by the third sleeve actuator ACT3 via the third shift fork Y3, and the reverse drive gear I_RReverse clutch gear G fixedly coupled to_RTo the reverse drive gear I_RAre selectively rotated together with the countershaft 60.
[0019]
Engagement and disengagement control of the first clutch C1 and the second clutch C2 is performed respectively for the first clutch input disk C1._i, Second clutch input disc C2_iThe first clutch / clutch plate (not shown) and the second clutch / clutch plate (not shown) connected to the first clutch piston (not shown) and the second clutch piston (not shown) driven by hydraulic pressure. , First clutch output disk C1_o, Second clutch output disk C2_oThe first clutch / clutch plate (not shown) and the second clutch / clutch plate (not shown) connected to each other are frictionally engaged.
The piston is driven by controlling the supply and discharge of the hydraulic oil supplied from the hydraulic supply source OP in FIG. 1 to the piston oil chamber, and the first clutch supply hydraulic control valve VC1 and the second clutch supply hydraulic control. This is done by controlling the valve VC2 by an electronic control unit (hereinafter referred to as ECU) 100.
[0020]
Further, as described above, the movement of the first sleeve S1, the second sleeve S2, and the third sleeve S3 is performed by the first sleeve actuator ACT1, the second sleeve actuator ACT2, and the third sleeve actuator ACT3, respectively.
Although a detailed description of the structure of each sleeve actuator is omitted, the piston to which the shift fork is connected is moved in a desired direction, and hydraulic oil supplied from the hydraulic supply source P0 is formed on both sides of the piston. For this purpose, a valve for controlling the supply of hydraulic oil to each piston oil chamber and a valve for controlling the discharge of hydraulic oil from each piston oil chamber are provided. The ECU 100 controls the opening and closing of these valves.
[0021]
In addition, as is well known, control of engagement and release of the lockup clutch 23 is performed by flowing hydraulic oil from between the front cover 20 and the lockup clutch 23 to between the pump 21 and the stator 25, or vice versa. The operation is performed by flowing hydraulic oil from between the pump 21 and the stator 25 toward the front cover 20 and the lock-up clutch 23, and a lock-up hydraulic control valve VL is provided for this purpose. The valve VL is also controlled by the ECU 100.
[0022]
1 is a shift selector, and the driver obtains a desired range by moving the shift knob 81. 82 is an O / D (overdrive) switch, and the fourth speed stage can be obtained only when the O / D switch 82 is turned on. A signal indicating the range selected by the driver and a signal indicating whether the O / D switch 82 is ON or OFF are sent to the ECU 100.
In FIG. 1, reference numeral 90 denotes a brake sensor, and a signal indicating whether the brake pedal is stepped on or not is sent to the ECU 100.
[0023]
The ECU 100 includes a digital computer, and an input interface circuit 101, an ADC (analog / digital converter) 102, a CPU (microprocessor) 103, a RAM (random access memory) 104, a ROM (read only memory) 105, which are connected to each other. An output interface circuit 106 is provided.
The CPU 103 receives output signals from a vehicle speed sensor 111 that detects the vehicle speed, a throttle opening sensor 112 that detects the throttle opening, an engine speed sensor 113 that detects the engine speed, a shift selector 80, a brake sensor 90, and the like. It is input via the input interface circuit 101 or further via the ADC 102.
[0024]
The CPU 103 generates a signal for controlling the sleeve actuator for moving the sleeves and controls the twin clutch type automatic operation in order to perform the control of the present invention to be described later from the values of the various sensors and the data stored in the ROM 105. A signal for controlling the first clutch supply hydraulic control valve VC1 and the second clutch supply hydraulic control valve VC2 for controlling the clutch of the transmission, a signal for controlling the actuator for moving the sleeves, and a lockup for controlling the lockup clutch A signal for controlling the hydraulic control valve VL is generated and sent to each via the output interface circuit 106.
[0025]
FIG. 2 shows the first clutch C1, the second clutch C2, the first sleeve S1, the second sleeve S2, the third, at each shift position (of the shift selector) and at each speed stage in the embodiment of the present invention. The state of engagement of the sleeve S3 is shown. Those marked with ○ are engagements for transmission of power at the speed stage, and Δ is engagement by pre-selection (pre-engagement) for the next speed change for early downshifting, ▽ Indicates engagement by pre-selection for early upshifting.
[0026]
In the P range and the N range, both the first clutch C1 and the second clutch C2 are released, and the first sleeve S1 of the first synchronizer D1 is connected to the first speed clutch gear G.₁The second sleeve S2 of the second synchronizer D2 is positioned at the intermediate position (M), and the sleeve S3 of the third synchronizer D3 is positioned at the intermediate position.
[0027]
In the first speed stage, the first clutch C1 is engaged, the second clutch C2 is released, and the first sleeve S1 of the first synchronizer D1 is connected to the first speed clutch gear G.₁The second sleeve S2 of the second synchronizer D2 is positioned at the neutral position when the brake is on, and the second speed clutch gear G when the brake is off.₂It is positioned on the side. Further, the sleeve S3 of the third synchronizer D3 is positioned at the intermediate position.
[0028]
On the other hand, in the reverse speed, the first clutch C1 is released, the second clutch C2 is engaged, and the first sleeve S1 of the first synchronizer D1 is connected to the first speed clutch gear G.₁The second sleeve S2 of the second synchronizer D2 is positioned at the intermediate position, and the sleeve S3 of the third synchronizer D3 is positioned at the intermediate position.
[0029]
Therefore, when shifted from the P range and the N range to the R range, the sleeve S3 of the third synchronizer D3 is moved from the intermediate position to the reverse clutch gear G._RThe reverse gear can be obtained simply by engaging the second clutch C2 with the second clutch C2.
Further, when the brake is ON at the first speed stage and the gear is shifted to the R range, the sleeve S3 of the third synchronizer D3 is moved from the intermediate position to the reverse clutch gear G._RThe reverse gear can be obtained simply by disengaging the second clutch C2 and engaging the first clutch C1.
In any case, the movement of the sleeve moves the sleeve S3 of the third synchronizer D3 from the intermediate position to the reverse clutch gear G._RIt only moves to the side.
[0030]
In the reverse stageIs the firstThe first clutch C1 is released, the second clutch C2 is engaged, the first sleeve S1 of the first synchronizer D1 is positioned on the first speed clutch gear G1 side, and the second sleeve S2 of the second synchronizer D2 is Since the sleeve S3 of the third synchronizer D3 is positioned at the neutral position and the sleeve S3 is positioned at the intermediate position, the second clutch output shaft 50 coupled to the second clutch output disk C2o is connected to the second speed drive gear I2, fourth gear. The countershaft 60 rotates through the countershaft driven gear OS that is always meshed with the countershaft drive gear IS and rotates with the high speed drive gear I4 and the countershaft drive gear IS, and the third sleeve S3 is moved to the reverse clutch gear GR side. As a result, the reverse drive gear IR rotates, and as a result, the first speed driven gear O1 is transmitted via the reverse idler gear MR. Then, since the first sleeve S1 is positioned on the first speed clutch gear G1 side, the output shaft 70 rotates together with the first hub H1 and the second hub H2, and power is transmitted.
[0031]
On the other hand, when the brake is OFF at the first speed stage, the second sleeve S2 of the second synchronizer D2 is in the second speed clutch gear G.₂When the second speed stage is requested, the first clutch C1 is released and the second clutch C2 is simply engaged without moving the sleeve when the second speed stage is required. Can do.
[0032]
FIG. 3 is a flowchart of a routine for performing the above control. If it is determined in step 1 that the shift position is set to R and a reverse gear is required, the first clutch C1, the second clutch C2, the second clutch C1, the second clutch C2, as shown in FIG. 1 sleeve S1, 2nd sleeve S2, and 3rd sleeve S3 are operated, and it complete | finishes.
When it is determined that the reverse gear is not required, the process proceeds to step 2 to determine whether or not the P, N range is set. When the determination is affirmative, the P, N range in FIG. Each clutch and sleeve is actuated as shown in FIG. When a negative determination is made, the vehicle is in the forward range, so the process proceeds to step 5 to determine whether or not it is the first speed stage. When an affirmative determination is made, the process proceeds to step 6 and first, each clutch is set in FIG. As shown for the first speed stage, the process proceeds to step 7 to determine whether or not the brake pedal is ON (the brake pedal is depressed). If an affirmative determination is made in step 7, each sleeve is actuated as shown for the first speed stage in FIG.
[0033]
If a negative determination is made in step 5, the process proceeds to step 9 to determine whether or not it is the second speed stage, and if a positive determination is made, each clutch and sleeve is shown for the second speed stage in FIG. To finish.
If a negative determination is made in step 9, the process proceeds to step 12 to determine whether or not the speed is the third speed stage. If an affirmative determination is made, each clutch and sleeve are shown for the third speed stage in FIG. To finish.
If a negative determination is made in step 12, the clutches and sleeves are operated as shown for the fourth speed stage in FIG.
In addition, the determination of the request | requirement of each speed stage in the range for advancing is performed using the shift map (not shown) memorize | stored in ROM105 based on a vehicle speed and load.
[0034]
【The invention's effect】
According to the invention of each claim, since only one synchronizing device has to be activated when the reverse gear is selected, the reverse gear can be achieved quickly and the hydraulic pressure for operating the synchronizing device is reduced. Therefore, controllability is also ensured. Since the second synchronizer is positioned at the intermediate position, the second-speed driven gear or the fourth-speed driven gear is not rotated, and the resistance generated when these gears agitate the oil is reduced. .
Further, when shifting from the P range to the D range, it is possible to start only by engaging the first clutch, and when shifting from the R range (reverse speed) to the D range, the third synchronization device for the reverse speed is opened. The first speed stage can be achieved only by switching from the second clutch to the first clutch (change from first clutch release / second clutch engagement to first clutch engagement / second clutch release).
Further, in the shift from the first speed stage to the second speed stage, the second synchronizer is positioned from the intermediate position to the position for the second speed stage (position where the second driven gear is engaged), and the second clutch to the second speed stage. This can be achieved only by changing the clutch (first clutch engagement / second clutch release to first clutch release / second clutch engagement).
In particular, according to the second aspect, in the first speed stage, the second synchronizer is preselected at the second speed stage position except when there is a possibility that the reverse speed is selected, so that the upshift is required. In this case, it is possible to quickly shift to the second speed stage.
[Brief description of the drawings]
FIG. 1 is a diagram showing an overall configuration of a twin clutch type transmission provided with a transmission control device of the present invention.
2 shows each shift position in the twin clutch transmission of FIG. 1, the engagement of the first clutch C1 and the second clutch C2 at each speed stage, and the first sleeve S1, the second sleeve S2, and the third sleeve S3. It is a figure which shows the combination of a position.
FIG. 3 is a flowchart of control in the embodiment of the present invention.
[Explanation of symbols]
1 ... Engine
2 ... Torque converter
3 ... Twin clutch type automatic transmission
10 ... Engine output shaft
30 (transmission) input shaft
40. First clutch output shaft
50 ... Second clutch output shaft
60 ... Sub shaft
70 (transmission) output shaft
80 ... shift selector
90 ... Brake sensor
100: Electronic control unit
C1 ... 1st clutch
C2 ... Second clutch
C1_i, C2_i... First and second clutch input disks
C1_o, C2_o... First and second clutch output disks
I₁, I₂, I₃, I₄, I_R... 1st, 2nd, 3rd, 4th speed, reverse drive gear
O₁, O₂, O₃, O₄, O_R... 1st, 2nd, 3rd, 4th speed, reverse driven gear
I_s... Sub shaft drive gear
O_s... Sub shaft driven gear
M_R... Reverse idler gear
G₁, G₂, G₃, G₄, G_R... First, second, third, fourth gear, reverse clutch gear
D1, D2, D3 ... 1st, 2nd, 3rd synchronization device
H1, H2, H3 ... 1st, 2nd, 3rd hubs
Y1, Y2, Y3 ... 1st, 2nd, 3rd shift forks
S1, S2, S3 ... 1st, 2nd, 3rd sleeve
ACT1, ACT2, ACT3 ... 1st, 2nd, 3rd sleeve actuator
VC1, VC2 ... First and second clutch supply hydraulic control valves
VL ... Lock-up clutch supply hydraulic control valve

Claims (2)

A transmission input shaft coupled to the engine via a torque converter;
A first clutch output shaft selectively engaged with a transmission input shaft via a first clutch;
A second clutch output shaft disposed coaxially with the first clutch output shaft and selectively engaged with the transmission input shaft via the second clutch;
A countershaft disposed parallel to the first clutch output shaft and the second clutch output shaft;
A transmission output shaft disposed parallel to the first clutch output shaft and the second clutch output shaft;
A first speed stage drive gear and a third speed stage drive gear fixedly mounted on the first clutch output shaft;
A second speed stage drive gear, a fourth speed stage drive gear, and a countershaft drive gear for rotating the countershaft fixedly mounted on the second clutch output shaft;
A first rotation gear is rotatably disposed on the transmission output shaft and meshes with the first speed stage drive gear and is engaged with the transmission output shaft by the first synchronizer when the first speed stage is selected. A first speed stage driven gear and a third speed stage driven gear meshed with the third speed stage drive gear and engaged with the transmission output shaft by the first synchronizer when the third speed stage is selected;
It is rotatably arranged on the transmission output shaft, and meshes with the drive gear of the second speed stage, and is engaged with the transmission output shaft by the second synchronizer when the second speed stage is selected. A second speed stage driven gear, a third speed stage driven gear meshed with the fourth speed stage drive gear and engaged with the transmission output shaft by the second synchronizer when the fourth speed stage is selected;
A countershaft driven gear fixedly mounted on the countershaft and meshing with the countershaft drive gear;
A reverse drive gear that is rotatably mounted on the countershaft and meshes directly or indirectly with the first speed stage driven gear and is engaged with the subshaft by the third synchronizer when the reverse gear is selected;
P range for stop standby selected by the driver, reverse R range, neutral N range, D range that automatically shifts between the first speed stage and the fourth speed stage for forward movement, the first speed stage And a shift selector having two ranges that automatically shift between the second speed stage and an L range that is fixed to the first speed stage,
The first clutch is released in the P range, the N range, the second speed stage, the fourth speed stage, and the reverse speed stage, and is engaged in the first speed stage and the third speed stage, and the second clutch is in the P range, N Release at the range, the first speed stage, the third speed stage, and engage at the second speed stage, the fourth speed stage, the reverse speed stage,
When the P range and the N range are selected, and at the first speed stage of each forward range, the first synchronizer is positioned at a position where the first driven gear is engaged with the transmission output shaft, When the second synchronizer is positioned at the intermediate position, the third synchronizer is positioned at the non-engagement position, and the reverse speed is selected from the first speed stage in each of the P range, the N range, or the forward range. The twin clutch type automatic transmission is characterized in that the movement of the synchronizer is only a movement for engaging the reverse drive gear of the third synchronizer with the countershaft. A transmission input shaft coupled to the engine via a torque converter;
  A first clutch output shaft selectively engaged with a transmission input shaft via a first clutch;
  A second clutch output shaft disposed coaxially with the first clutch output shaft and selectively engaged with the transmission input shaft via the second clutch;
  A countershaft disposed parallel to the first clutch output shaft and the second clutch output shaft;
  A transmission output shaft disposed parallel to the first clutch output shaft and the second clutch output shaft;
  A first speed stage drive gear and a third speed stage drive gear fixedly mounted on the first clutch output shaft;
  A second speed stage drive gear, a fourth speed stage drive gear, and a countershaft drive gear for rotating the countershaft fixedly mounted on the second clutch output shaft;
  A first rotation gear is rotatably disposed on the transmission output shaft and meshes with the first speed stage drive gear and is engaged with the transmission output shaft by the first synchronizer when the first speed stage is selected. A first speed stage driven gear and a third speed stage driven gear meshed with the third speed stage drive gear and engaged with the transmission output shaft by the first synchronizer when the third speed stage is selected;
  It is rotatably arranged on the transmission output shaft, and meshes with the drive gear of the second speed stage, and is engaged with the transmission output shaft by the second synchronizer when the second speed stage is selected. A second speed stage driven gear, a third speed stage driven gear meshed with the fourth speed stage drive gear and engaged with the transmission output shaft by the second synchronizer when the fourth speed stage is selected;
  A countershaft driven gear fixedly mounted on the countershaft and meshing with the countershaft drive gear;
  A reverse drive gear that is rotatably mounted on the countershaft and meshes directly or indirectly with the first speed stage driven gear and is engaged with the subshaft by the third synchronizer when the reverse gear is selected;
  P range for stop standby selected by the driver, reverse R range, neutral N range, D range that automatically shifts between the first speed stage and the fourth speed stage for forward movement, the first speed stage And a shift selector having two ranges that automatically shift between the second speed stage and an L range that is fixed to the first speed stage,
  The first clutch is released in the P range, the N range, the second speed stage, the fourth speed stage, and the reverse speed stage, and is engaged in the first speed stage and the third speed stage, and the second clutch is in the P range, N Release at the range, the first speed stage, the third speed stage, and engage at the second speed stage, the fourth speed stage, the reverse speed stage,
  When the P range and the N range are selected, the first synchronizer is positioned at a position where the first driven gear is engaged with the transmission output shaft, the second synchronizer is positioned at an intermediate position, and the first synchronizer is positioned at the intermediate position. 3 Position the synchronizer in the disengaged position,
In the first speed stage of each forward range, the first synchronizer is positioned at a position where the first driven gear is engaged with the transmission output shaft, and the second synchronizer is operated by the braking device of the vehicle. When the vehicle braking device is not operated, the vehicle is positioned at the second speed stage position, the third synchronization device is positioned at the disengaged position,
  When the reverse speed is selected from the first speed stage of each of the P range, N range, or forward range, the synchronization device moves only to engage the reverse drive gear of the third synchronization device with the secondary shaft. ,
  A twin-clutch automatic transmission characterized by this.

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