JPH1054460A - Hydraulic/pneumatic operating device used for direct drive transmission with which torque converter with shift clutch is combined - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten gear putting time during shift and starting time, by operating drive gear synchromesh at the time of shift so as to cut a drive gear from an input shaft, and interrupting the previous dragging torque from a counter shaft so as to put into a gear. SOLUTION: In the case of shift, when a clutch pedal is stepped on, an ON signal from a clutch switch 44 is inputted into a control unit 17 so as to change over an electromagnetic switching valve 18, a mesh condition of drive gear synchromesh 67 is released so that a drive gear 65 is placed in a neutral position and separated from an input shaft 62, and in a direct drive transmission 60, a front side dragging torque is interrupted from a counter shaft 64 so as that a second speed is put out of gear and shifted to a third speed. The front side dragging torque is interrupted from the counter shaft 64, thereby the gear shift of the third speed is thusly put into a gear certainly, and shift time can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic / pneumatic operation device used for a direct drive transmission in which a torque converter with a transmission clutch is combined.

[0002]

[Background Art] Recently, diesels with turbochargers
Commercial vehicles with engines tend to utilize direct drive transmissions that combine a torque converter with a shifting clutch and a lock-up clutch. Since the diesel engine has insufficient output torque in the low-speed rotation range and acceleration is disadvantageous at the time of starting, the torque is increased by the torque converter at the time of starting to compensate for the startability. At times, the torque converter is mechanically coupled with the lock-up clutch and placed in a direct connection. Also,
The torque converter is supplied with pressure oil in a low pressure circuit, the transmission clutch and lock-up clutch are supplied with pressure oil in a high pressure circuit, and in the transmission clutch the clutch facing is lubricated with an oil spray circuit. You.

[0003] Since the oil spray circuit is supplied with hydraulic oil from the low-pressure circuit and the high-pressure circuit, when the shift clutch is connected, the high-pressure side and the low-pressure side are connected, and the hydraulic pressure of the high-pressure circuit drops. Is done. In addition, since the pressure oil of the high-pressure circuit is used for lubrication even when the transmission clutch is disengaged, the amount of lubrication oil increases.

Further, since the transmission clutch is lubricated with oil spray, the transmission clutch is not disengaged by the drag torque of the clutch facing, so that the gear can be shifted during shifting and when starting, particularly when starting at low temperatures. Insertion time becomes longer.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide an oil used in a direct drive transmission which is combined with a torque converter having a speed change clutch which can reduce the time required for shifting and the time required for engaging a gear when starting. An object of the present invention is to provide a pneumatic operating device.

Another object of the present invention is to make it possible to shorten a gear shift time at the time of shifting and a gear shift time at the time of starting, simplify a lubricating circuit, and secure a required amount of lubricating oil. Another object of the present invention is to provide a hydraulic and pneumatic operating device used in a direct drive transmission that combines a torque converter with a speed change clutch that can reduce a shift time by avoiding a pressure drop in a high-pressure circuit.

[0007]

Means corresponding to the object and the operation thereof
A transmission counter drive control circuit with an electromagnetic switching valve and a pneumatic source connected to a torque interrupting air cylinder that couples and disconnects the drive gear to the input shaft, and a main regulator valve upstream To the downstream side
A torque regulator for connecting a torque converter to an oil pump with a converter regulator valve
A lock-up clutch control circuit comprising a converter circuit and a pilot-operated lock-up valve for connecting the torque converter lock-up clutch upstream of the main regulator valve of the torque converter circuit. And a transmission clutch control circuit comprising a pilot operated transmission valve and connecting a transmission clutch of the torque converter upstream of the main regulator valve of the torque converter circuit; and In this case, the drive gear synchromesh is operated with the air cylinder to disconnect the drive gear from the input shaft, and the front drag torque is interrupted from the counter shaft to enable gear insertion. I do.

Further, the present invention includes an electromagnetic switching valve,
The transmission counter drive control circuit connects the air pressure source to the air cylinder, which interrupts the torque by connecting and disconnecting the drive gear to the input shaft, the main regulator valve on the upstream side, and the torque on the downstream side. A torque converter circuit having a converter regulator valve and a torque converter connected to the oil pump, and a main regulator of the torque converter circuit having a pilot operated lock-up valve.
A lock-up clutch control circuit for connecting the torque converter lock-up clutch upstream of the valve, and a pilot operated shifting valve upstream of the main regulator valve of the torque converter circuit. A transmission clutch control circuit for connecting the transmission clutch of the torque converter to the transmission, a high-pressure transmission clutch oil spray circuit having a throttle connected downstream of the transmission valve of the transmission clutch control circuit, Throttle with its main regulator valve and torque converter
A low-pressure side shifting clutch oil spray circuit connected to the torque converter circuit between the regulator valve and operating the drive gear synchromesh with the torque interrupting air cylinder during shifting. Disconnect the drive gear from the input shaft and interrupt the front drag torque from the countershaft to allow gearing, and when the transmission clutch is engaged, the high and low pressure sides The shift clutch oil spray circuit lubricates the clutch facing of the shift clutch,
When the shift clutch is disengaged, the clutch facing of the shift clutch is lubricated only by the low-pressure shift clutch oil spray circuit.

The present invention further provides a transmission counter drive control circuit having an electromagnetic switching valve and connecting an air pressure source to a torque interrupting air cylinder which couples and disconnects a drive gear to an input shaft. , A main regulator valve on the upstream side and a torque converter regulator valve on the downstream side to connect the torque converter to the oil pump, and a pilot-operated lock-up valve. A lock-up clutch control circuit for connecting a lock-up clutch of the torque converter upstream of the main regulator valve of the torque converter circuit; and a pilot operated shift and lubrication valve; A shift clutch control circuit for connecting the shift clutch of the torque converter upstream of the main regulator valve of the torque converter circuit via the shift side of the shift and lubrication valve; Via the lubrication side of the valve to its main regulator valve and torque
The torque between converter, regulator and valve
A shifting clutch oil spray circuit connected to the converter circuit, a throttle, and a short circuit connecting the valve outlet side to the valve inlet side in the shifting clutch oil spray circuit; When the torque is interrupted by the air cylinder, the drive gear
Operate the synchromesh to disconnect the drive gear from the input shaft, and interrupt the front drag torque from the counter shaft to allow gearing, and when the transmission clutch is engaged, Kills the valve inlet side of the shift clutch oil spray circuit and clutches the shift clutch
Lubricate the facing and, when the shift clutch is disengaged, make use of the valve inlet side of the shift clutch oil spray circuit to lubricate the clutch facing of the shift clutch.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of a hydraulic / pneumatic operating device used in a direct drive transmission combined with a torque converter with a transmission clutch according to the present invention will be described below with reference to the drawings. FIGS. 1 to 4 show a turbocharged diesel
This shows a specific example 10 of the hydraulic / pneumatic operating device used in the direct drive transmission which is combined with the torque converter with the speed change clutch of the present invention, which is applied to a heavy truck on which the engine 120 is mounted. This hydraulic / pneumatic operation device 10 is combined with a torque converter 80 and has an input shaft 6
2. Applies to a direct drive transmission 60 that uses an output shaft 63 and a counter shaft 64 and allows shifting to six forward speeds and one reverse speed.

In the direct drive transmission 60, a drive gear 65 is rotatably supported on an input shaft 62 in a gear case 61 and is fixedly supported on a counter shaft 64.・ 6 meshed with gear 66
One gear pair (not shown) is set to the first to fifth and reverse gear ratios and its output shaft 63
And disposed on a counter shaft 64, and
When the drive gear 65 is coupled to the input shaft 62 by a drive gear synchromesh 67 and selected from any of the first to fifth and reverse gear pairs, the power is reduced to the selected speed. And the input shaft 62 and the counter shaft 6
4 to its output shaft 63,
In addition, the output shaft 63 is
When coupled to the input shaft 62 by the drive synchromesh 68, power is transmitted directly from the input shaft 62 to the output shaft 63, so-called direct drive. Of course, the first to fifth speeds and the reverse speed are performed by a manually operated synchromesh (not shown) disposed on the output shaft 63 corresponding to each of the speeds.

The torque converter 80 associated with the direct drive transmission 60 includes a flywheel housing (shown in FIG. 1) disposed between the diesel engine 120 and the direct drive transmission 60. And the bearing 89 is disposed on a stator shaft 91 which is disposed in a space surrounded by the clutch housing 114 and is fitted to the root side of the input shaft 62 of the direct drive transmission 60. Impeller 81 to be performed,
Turbine 8 opposed to the impeller 81 and supported on the distal portion of the input shaft 62
2, a stator 83 supported on a tip portion of the stator shaft 91 with a one-way clutch 92 interposed between the impeller 81 and the turbine 82, and the turbine 82 so as to form a closed circulation circuit. And a shroud 84 integrally coupled to the impeller 81 and supported on a boss 90 of the turbine 82, and disposed between the turbine 82 and the shroud 84 to remove the turbine 82 through the shroud 84. Lock-up clutch 85 enabling connection and disconnection to impeller 81
A transmission clutch 86 disposed outside of the shroud 84 between the input shaft 62 and the turbine 82 to enable the turbine 82 to be connected to and disconnected from the input shaft 62, and a crankshaft of the diesel engine 120. The shroud 84 is fixedly supported by the shaft 121 and the crankshaft 1
21 with a flexible drive disc 87 that is integrally coupled to and enables connection and disconnection of power transmitted from the diesel engine 120 to the transmission 60 as the heavy truck starts and shifts. When the heavy truck runs, power is transmitted from the diesel engine 120 to the transmission 60. Of course, the torque converter 80 is connected to the pump drive gear 113.
The oil pump 23 which is operated in mesh with
It has.

The lock-up clutch 85 is used where a torque converter drive or a direct drive can be selected. Specifically, the torque converter 8 is turned off when the torque converter is driven, and connected when the direct drive is performed, and the torque converter 8 is connected with the same efficiency as the mechanical drive.
0 to the transmission 60. Further, structurally, the lock-up clutch 85 is configured as a clutch utilizing the shroud 84, that is, the so-called shroud 84 is also used as a part of the clutch. Specifically, the lock-up
The clutch 85 is connected to the shroud 8 by the turbine 82.
A plurality of friction ring rings are disposed between the turbine 82 and the shroud 84 in a space defined inside of the shroud 4, and are splined to the outer periphery and located in the clutch drum bore 95 of the shroud 84. A clutch disk 96 having plates 97, 97 and screwed to a boss 90 of the turbine 82;
A plurality of clutch ring plates 98, 9 alternately superimposed on the plurality of friction ring plates 97, 97 within the clutch drum bore 95 and splined to the clutch drum bore 95.
8 and a lock-up clutch control cylinder 99 that presses the clutch ring plates 98, 98 against the friction ring plates 97, 97, and hydraulically locks the lock-up clutch control. The cylinder 99 is operated to enable the turbine 82 to be connected to and disconnected from the impeller 81. The lock-up clutch control cylinder 99 is machined with a ring cylinder bore 100 in the shroud 84 and the ring cylinder bore 1
00 is embodied in a structure in which the clutch ring piston 101 is fitted.

The shift clutch 86 is disengaged at the time of shifting, so-called disengaged, and the direct drive clutch 86 is disengaged.
It is used where the transmission 60 can change gears. Also, structurally, the transmission clutch 86 is assembled in an external form that is located in the space between the shroud 84 and the flexible drive disk 87. Specifically, the transmission clutch 86 is fixedly screwed to the end face of the boss 90 of the turbine 82 which projects slightly outside the front end wall 93 forming the front of the shroud 84. And a clutch drum 102 disposed between the shroud 84 and the flexible drive disk 87, and a plurality of friction ring plates 105, 105 spline-coupled to the outer periphery and located in the clutch drum 102. A clutch disc 103 supported on the input shaft 62 by a hub 104 splined to the tip of the input shaft 62 in the clutch drum 102 and the clutch drum 10
The plurality of friction ring plates 10 in 2
A plurality of clutch ring plates 106, 106 alternately superimposed on the clutch ring plates 105 and 105 and spline-coupled to the inside of the clutch drum 102, and the clutch ring plates 106, 106 are connected to the friction ring plate. The transmission clutch control cylinder 107 is pressed against the transmission clutch control cylinder 107, and the return spring 110 pushes the transmission clutch control cylinder 107 back.
Is activated to connect and disconnect the turbine 82 to the input shaft 62. The transmission clutch control cylinder 107 is connected to the clutch drum 10
The second embodiment is embodied in a structure in which a ring cylinder bore 108 is machined and a clutch ring piston 109 is fitted into the ring cylinder bore 108. The return spring 110 also
Drum 102 and its clutch ring piston 109
And the clutch ring piston 1
09 can be pushed back.

The flexible drive disk 8
7 allows the hub 111 to be bolted to the end face of the crankshaft 121 and integrally connected to the shroud 84 by a drum-shaped spacer 94 to transmit the power of the diesel engine 120 to the impeller 81. I do. The hub 111 also includes a bearing 112
, The tip of the input shaft 62 is fitted, and the input shaft 62 is rotatably supported.

The hydraulic and pneumatic operating device 10 includes an electromagnetic switching valve 18 and connects the pneumatic source 20 to a torque interrupting air cylinder 72 that couples and disconnects the drive gear 65 to the input shaft 62. Transmission drive control circuit 11, a main regulator valve 21 on the upstream side, and a torque converter regulator on the downstream side.
A torque converter circuit 12 having respective valves 22 for connecting the torque converter 80 to the oil pump 23;
A lock-up clutch control circuit 13 having a valve 26 and connecting the lock-up clutch 85 of the torque converter 80 upstream of the main regulator valve 21 of the torque converter circuit 12; The transmission clutch control circuit 14 for connecting the transmission clutch 86 of the torque converter 80 upstream of the main regulator valve 21 of the torque converter circuit 12 and the throttle 42, Equipped with the shift valve 3 of the shift clutch control circuit 14
, High-pressure side shift clutch, oil,
A low pressure side shift clutch oil spray circuit 16 having a throttle 43 and connected to the torque converter circuit 12 between the main regulator valve 21 and the torque converter regulator valve 22 with a throttle 43; , Clutch sensor (clutch switch) 44, accelerator sensor 45, diagnostic switch 46, engine rotation sensor 47, vehicle speed sensor 48, torque converter oil temperature sensor 49, neutral switch 50, and direct drive switch 51
And the control unit 17 for operating the electromagnetic switching valve 18, the lock-up valve 26, and the shift valve 34, and for turning on the oil temperature alarm lamp 52 and the diagnosis lamp 53. You.

The transmission counter drive control circuit 11 includes an electromagnetic switching valve 18
Electrically connects the solenoid coil 19 to the control unit 17 and when the solenoid coil 19 is energized by the current provided by the control unit 17, the valve is switched and the pneumatic pressure is increased. Compressed air is supplied from the source 20 to the torque break air cylinder 72 to move the torque break air cylinder 72. Its torque interrupted air cylinder 72
Means that the piston rod 74 is
The counter-drive shifter fork 70 is embodied as a double-acting double-rod type that can be inserted into and removed from the cover, and the counter drive shifter fork 70 is slidably supported on the shifter shaft 69 so that its piston rod 74 The counter drive shifter fork 70 is connected to one side, and the counter drive shifter fork 70
To operate the drive gear synchromesh 67 to connect and disconnect the drive gear 65 to the input shaft 62.

As such, the first to fifth and reverse speeds are such that the drive gear synchromesh 67 is operated by the torque interrupting air cylinder 72 and the drive gear synchromesh 67 is operated by the drive gear synchromesh 67. 65 is coupled to the input shaft 62 and the speed change is enabled, but the sixth speed, i.e., direct drive, requires the direct drive shifter fork 71 to be manually operated on the shifter shaft 69. The direct drive shift fork 71 operates the direct drive synchromesh 68, and the output drive 63 is connected to the input shaft 62 at the direct drive synchro mesh 68. And the shift is enabled

Further, the torque interrupting air cylinder 7
2 is connected to its pneumatic source 20 by an emergency pneumatic circuit 54 provided with a manual valve 55, and is capable of shifting to first to fifth speeds and reverse speed even in an emergency.

The torque converter circuit 12 is shown in FIG.
The oil is returned from the torque converter 80 to the oil reservoir 24 via the oil cooler 25 as shown in FIG. Of course, the oil reservoir 24 utilizes the bottom of the clutch housing 114. The lock-up clutch control circuit 13 is shared by the transmission valve 34 on the upstream side and the transmission clutch control circuit 14 on the upstream side.

The lock-up valve 26 is embodied as a spring offset spool valve, and
A lock-up pilot hydraulic circuit 30 using an electromagnetic pilot valve 31 leads the pilot converter chamber 28 from the torque converter circuit 12 upstream of the main regulator valve 21 to the pilot hydraulic chamber 28, and spools against the spring 29. It is operated by the pilot oil pressure acting on 27. The lock-up pilot hydraulic circuit 30 connects the pilot hydraulic chamber 28 to the main regulator regulator of the torque converter circuit 12.
It is connected to the upstream side of the valve 21, and the throttle 33 is provided on the way.
Is arranged in the middle of the electromagnetic pilot valve 31 and downstream of the throttle 33. The solenoid pilot valve 31 electrically connects the solenoid coil 32 to the control unit 17 and is opened and closed by the control unit 17.

The transmission valve 34 is embodied as a spring offset spool valve and is controlled by the transmission pilot hydraulic circuit 38 using an electromagnetic pilot valve 39 to control the main regulator valve 21 of the torque converter circuit 12. It is guided from the upstream side to the pilot hydraulic chamber 36, and is operated by the pilot hydraulic pressure acting on the spool 35 against the spring 37. The shifting pilot hydraulic circuit 38 connects the pilot hydraulic chamber 36 to the torque converter circuit 12 upstream of the main regulator valve 21;
Then, the throttle 41 is arranged on the way, and the electromagnetic pilot valve 39 is arranged on the way downstream of the throttle 41 on the way. In the shift pilot hydraulic circuit 38, the upstream side of the throttle 41 is shared with the lockup / pilot hydraulic circuit 30 upstream of the throttle 33. The solenoid pilot valve 39 electrically connects the solenoid coil 40 to the control unit 17 and is opened and closed by the control unit 17.

Next, the control of the direct drive transmission 60 and the torque converter 80 performed by the hydraulic / pneumatic operating device 10 according to the starting and running of the heavy truck will be described. First, the starting of the truck will be described. First, a shift lever (not shown) is operated. When the shift lever is moved to the neutral position, the neutral switch 50 is closed and the direct drive switch 51 is opened, so that the control unit 17 is controlled by the neutral switch 50.
Input from the direct drive switch 51 and an off signal from the
The start of the engine 120 is determined. When the diesel engine 120 is started, a clutch pedal (not shown) is depressed. Since the clutch switch 44 is closed, the control unit 17 inputs an ON signal from the clutch switch 44, and sends a current to the solenoid coil 40 of the electromagnetic pilot valve 39 to cause the solenoid switch 40 to close. The coil 40 is excited. Since the electromagnetic pilot valve 39 is closed,
Pilot hydraulic pressure is directed to the pilot hydraulic chamber 36 of the transmission valve 34 to move the spool 35 against the spring 37, and pressure oil is transmitted from the transmission clutch control cylinder 107 to the oil
The shift clutch 86 is disengaged by the reservoir 24 and disengaged.

Since the transmission clutch 86 is disengaged, the shift lever puts the direct drive transmission 60 into the starting gear. Next, the clutch pedal is returned. With the starting gear engaged, the neutral switch 50 is opened, and with the clutch pedal release, the clutch switch 44 is opened, so that the control unit 17 controls the neutral switch 50 and the clutch switch 4.
Then, an off signal is input from the controller 4 and the current flowing through the solenoid coil 40 of the electromagnetic pilot valve 39 is cut off to demagnetize the solenoid coil 40. As the electromagnetic pilot valve 39 is opened, pilot hydraulic pressure is released from the pilot hydraulic chamber 36 of the transmission valve 34 to the oil reservoir 24, the spool 35 is offset by the spring 37, and the transmission clutch control The circuit 14 is activated and pressure oil is supplied to the shift clutch control cylinder 107 to engage the shift clutch 86. When the transmission clutch 86 is engaged, the heavy truck is started. As such, the start interrupts the drag torque of the transmission clutch 86 to enable gear shifting, thereby ensuring the starting gear shifting and reducing the gear shifting time.

Next, a description will be given of a speed change when the heavy truck runs. When shifting from the second speed to the third speed, first depress the clutch pedal. The control unit 17 controls the clutch switch 4
Then, an ON signal is inputted from 4 and an electric current is applied to the solenoid coil 40 of the electromagnetic pilot valve 39 to excite the solenoid coil 40. As the solenoid pilot valve 39 is closed, pilot hydraulic pressure is directed to the pilot hydraulic chamber 36 of the transmission valve 34 to move the spool 35 against the spring 37 and the hydraulic oil is moved to the transmission clutch Control·
The shift clutch 86 is disengaged by being released from the cylinder 107 to the oil reservoir 24.

The control unit 17
Inputs an ON signal from the clutch switch 44, and outputs the solenoid signal of the electromagnetic switching valve 18 to the solenoid switch.
An electric current is applied to the coil 19 so that the solenoid coil 19
To excite. As the electromagnetic switching valve 18 is switched, compressed air is supplied from the pneumatic source 20 to the torque interrupting air cylinder 72 which causes the torque interrupting air cylinder 72 to move to the position of FIG.
The counter drive shifter fork 70 is slid up, and the drive gear synchromesh 67 is disengaged by the counter drive shifter fork 70 and the drive gear 65 is placed in neutral. .

Since the drive gear 65 is in a neutral state, the drive gear 65 is disconnected from the input shaft 62 and the direct drive transmission 60 has a front drag from the counter shaft 64. Torque is interrupted. In this state, the second speed gear is removed. That is, the shift lever is returned from the second speed position to the neutral position. At that time, the neutral switch 50 is closed and the ON signal is input to the control unit 17. Subsequently, the shift lever is shifted from the neutral position to the third speed position. When the third gear is engaged, the neutral switch 5
0 is open and the off signal is input to the control unit 17.

Since the control unit 17 receives the OFF signal of the neutral switch 50, the solenoid coil 1 of the electromagnetic switching valve 18 is controlled.
Turn off the current flowing through 9. Since the solenoid coil 19 is demagnetized, the solenoid directional valve 18 is switched and supplies compressed air from the pneumatic source 20 to the torque interrupting air cylinder 72, while at the same time the torque interrupting air cylinder 72 Compressed air is discharged into the atmosphere. The torque interrupting air cylinder 72 is driven by compressed air supplied by the electromagnetic switching valve 18, and slides the counter drive shifter fork 70 on the shifter shaft 69 leftward from the position of FIG. And the counter drive shifter fork 70
Engages the drive gear synchromesh 67 to couple the drive gear 65 to the input shaft 62.

When the drive gear 65 is engaged, the clutch pedal is returned. The clutch switch 44 is opened, and the off signal is input to the control unit 17. The control unit 17 inputs the off signal from the clutch switch 44 and outputs the electromagnetic pilot valve 39
The current flowing through the solenoid coil 40 is cut off to demagnetize the solenoid coil 40. Since the electromagnetic pilot valve 39 is opened, the pilot oil pressure is released from the pilot oil pressure chamber 36 of the shift valve 34 to the oil reservoir 24, and the shift clutch control circuit 14 is utilized to shift the pressure oil to the shift speed. The speed is supplied to the clutch control cylinder 107, and the speed change clutch 86 is engaged to complete the second speed-third speed shift. As such, the third speed shift interrupts the front drag torque from its countershaft 64 to allow gear shifting, thereby ensuring gear shifting and reducing shifting time.

In the direct drive (DD / sixth speed), the clutch pedal is first depressed.
The control unit 17 receives an ON signal from the clutch switch 44 and supplies a current to the solenoid coil 40 of the electromagnetic pilot valve 39 to excite the solenoid coil 40. As the solenoid pilot valve 39 is closed, pilot hydraulic pressure is directed to the pilot hydraulic chamber 36 of the transmission valve 34 to move the spool 35 against the spring 37 and the hydraulic oil is moved to the transmission clutch The control clutch 107 is released to the oil reservoir 24 and the transmission clutch 86 is disengaged.

The control unit 17 receives an ON signal from the clutch switch 44 and supplies a current to the solenoid coil 19 of the electromagnetic switching valve 18 to excite the solenoid coil 19. As the electromagnetic switching valve 18 is switched, compressed air is supplied from the air pressure source 20 to the torque interrupting air cylinder 72, which rotates the counter drive shifter fork to the position of FIG. The 70 is slid over the shifter shaft 69 and the counter drive shifter fork 70 disengages the drive gear synchromesh 67 and places the drive gear 65 in neutral.

Since the drive gear 65 is placed in the neutral state, the drive gear 65 is disconnected from the input shaft 62 and the direct drive transmission 60 is dragged forward from the counter shaft 64. Torque is interrupted. In this state, the fifth gear is disengaged. That is, the shift lever is returned from the fifth speed position to the neutral position. At that time, the neutral switch 50 is closed and the ON signal is input to the control unit 17. Subsequently, the shift lever is shifted from the neutral position to the direct drive position (sixth speed position). Operation of the shift lever causes the direct drive shifter fork 71 to slide leftward from the position of FIG. 1 onto the shifter shaft 69, and the direct drive shifter fork 71・ The output shaft 6 is engaged with the drive synchromesh 68
3 is directly coupled to its input shaft 62. At this time, the neutral switch 50 is opened by the shift lever operation, and the off signal is input to the control unit 17.

Next, the clutch pedal is returned. First, the clutch switch 44 is opened by the return of the clutch pedal where the neutral switch 50 is opened in the direct drive shift, so that the control unit 17 controls the neutral switch 50. And clutch switch 44
And turns off the current flowing through the solenoid coil 40 of the solenoid pilot valve 39 to demagnetize the solenoid coil 40. As the electromagnetic pilot valve 39 is opened, pilot hydraulic pressure is released from the pilot hydraulic chamber 36 of the transmission valve 34 to the oil reservoir 24, the spool 35 is offset by the spring 37, and the transmission clutch control The circuit 14 is activated and pressure oil is supplied to the shift clutch control cylinder 107 to engage the shift clutch 86. In this way, the speed change clutch 86 is engaged, and the speed change of the fifth speed-direct drive is completed. In this direct drive, since the rotation of the counter shaft 64 stops, the resistance to oil agitation is eliminated, contributing to low fuel consumption.

Also, the friction ring plates (clutch facing) 105, 10 which the hydraulic / pneumatic operation device 10 performs on the transmission clutch 86 are used.
4, the solenoid pilot valve 39 is opened to release the pilot hydraulic pressure from the pilot hydraulic chamber 36 to the oil reservoir 24, and the spool 35 is offset by the spring 37, as shown in FIG. And the transmission clutch control circuit 14
When the transmission clutch 86 is engaged by utilizing the torque, the friction ring plates 105, 105 are lubricated by the high pressure side and low pressure side transmission clutch oil spray circuits 15, 16. At that time, the high-pressure side and low-pressure side shift clutch oil spray circuit 1
5, 16 lubricate the friction ring plates 105, 105 independently of each other,
The transmission clutch control circuit 1 which is a high voltage circuit
4, the pressure drop is avoided and the shift time is shortened.

Further, the electromagnetic pilot valve 39 is closed and the pilot oil pressure is
From the upstream side of the main regulator valve 21 to the pilot hydraulic chamber 36 and the spool 35
When the transmission clutch control circuit 14 is killed and the transmission clutch 86 is disengaged, the high pressure side transmission clutch oil spray circuit 15 The friction ring plates 105, 105 killed by the transmission clutch control circuit 14 and
Is the low pressure side transmission clutch oil spray circuit 1
6 only lubricated. In this manner, the hydraulic / pneumatic operating device 10 uses the required amount of oil in accordance with the connection / disconnection state of the transmission clutch 86 to perform the friction ring plates 105, 105 of the transmission clutch 86, so-called clutch facing. Lubricate. In the hydraulic / pneumatic operation device 10, the transmission valve 34 is structurally simplified, and the lubrication circuit is simplified.

FIG. 5 is an illustration of an oil and air system used in a direct drive transmission that combines the torque converter with a shifting clutch of the present invention as applied to its heavy truck equipped with its turbocharged diesel engine 120. Another embodiment 130 of the pressure manipulator is partially shown. The hydraulic / pneumatic operating device 130 is different from the hydraulic / pneumatic operating device 10 described above in that the lock-up clutch control circuit 13,
The transmission clutch control circuit 14, the high pressure transmission clutch oil spray circuit 15, and the low pressure transmission clutch oil spray circuit 16 are modified and embodied.

The hydraulic / pneumatic actuator 130 is provided with its electromagnetic switching valve 18 and its pneumatic source 72 to its torque interrupting air cylinder 72 which couples and disconnects its drive gear 65 to its input shaft 62. 20, the transmission counter drive control circuit 11, the main regulator valve 21 on the upstream side, and the torque regulator on the downstream side.
The oil pump 23 includes a converter regulator valve 22 and the torque converter 8.
0 and its torque converter 80 with its pilot converter operated lock-up valve 26 upstream of its main regulator valve 21 in its torque converter circuit 12. A lock-up clutch control circuit 131 for connecting the lock-up clutch 85; a pilot operated shift and lubrication valve 137; The main
A transmission clutch control circuit 132 that connects the transmission clutch 86 of the torque converter 80 upstream of the regulator valve 21, and the main regulator valve 21 and the torque regulator via the lubrication side of the transmission and lubrication valve 137. Transmission clutch oil spray circuit 133 connected between converter regulator valve 22 and its torque converter circuit 12
And a throttle circuit 136, and a short-circuit circuit 134 that connects the valve outlet side to the valve inlet side in the shift clutch oil spray circuit 133;
Switch 44, accelerator sensor 45, diagnostic switch 46, engine rotation sensor 47, vehicle speed sensor 48,
Torque converter oil temperature sensor 49, neutral switch 50, and direct drive switch 5
1 to input information from the electromagnetic switching valve 18, the lock-up valve 26, and the shift and lubrication valve 1.
37, and the control unit 17 for turning on the oil temperature warning lamp 52 and the diagnosis lamp 53.

The lock-up clutch control circuit 131 includes a throttle 135 added downstream of the lock-up valve 26 and the lock-up clutch control circuit 131.
When the hydraulic pressure is supplied / discharged by the valve 26, the influence of the hydraulic pressure fluctuation is reduced.

The shift and lubrication valve 137 is a spring offset type spool valve which adds the function of switching the short circuit 134 to the shift valve 34 used in the hydraulic and pneumatic operating device 10 described above. Be transformed into And, this shift and lubrication valve 137
The transmission pilot hydraulic circuit 38 using the electromagnetic pilot valve 39 causes the torque converter circuit 1
2 is guided from the upstream side of its main regulator valve 21 to a pilot hydraulic chamber 139, and is operated by pilot hydraulic pressure acting on a spool 138 against a spring 140.

The short circuit 134 is used when the transmission clutch 86 is disconnected, and the transmission clutch 8
In the contact state of the shift clutch 6, the oil which is smaller than the shift and the flow rate of the oil passing through the lubrication valve 137 is supplied to the shift clutch
6. Flow into its friction ring plates 97, 97.

Next, the hydraulic / pneumatic operating device 130 applies the friction / force to the speed change clutch 86.
As shown in FIG. 5, the lubrication of the ring plates 105, 105 is performed by opening the electromagnetic pilot valve 39, releasing the pilot hydraulic pressure from the pilot hydraulic chamber 139 to the oil reservoir 24, and releasing the spool 138. When offset by the spring 140 and the transmission clutch control circuit 132 is activated to engage the transmission clutch 86, the friction ring plates 105, 105 are lubricated with oil through the transmission and lubrication valve 137. Is done.

Further, the electromagnetic pilot valve 39 is closed and the pilot oil pressure is
From the upstream side of the main regulator valve 21 to the pilot hydraulic chamber 139, and the spool 1
38 is operated with its pilot hydraulic pressure against its spring 140, and when the transmission clutch control circuit 132 is killed and the transmission clutch 86 is disengaged, the friction ring plates 105, 1
05 is lubricated with oil passing through its short circuit 134. As such, the hydraulic and pneumatic operating device 130 has a simplified lubrication circuit and the friction ring plate of the transmission clutch 86 with the required amount of oil depending on the on / off state of the transmission clutch 86. Clutch facing)
Lubricate 105, 105.

As will be apparent from the specific embodiments of the present invention described above with reference to the drawings, one skilled in the art to which the present invention pertains will appreciate the subject matter of the present invention. Is the nature of the invention (na
), and are readily embodied in other aspects that are objectively perceived as inherent in them. Of course, the content of the present invention corresponds to the subject of the invention (be commensu).
rate with) and essential for the invention.

[0044]

As will be appreciated from the foregoing, the hydraulic and pneumatic operating device used in the direct drive transmission that combines the torque converter with the shifting clutch of the present invention includes an electromagnetic switching valve, and A transmission counter drive control circuit that connects the air pressure source to the air cylinder with the torque interruption where the drive gear is connected to and disconnected from the shaft, a main regulator valve on the upstream side, and a torque converter regulator on the downstream side A torque converter circuit having a respective valve and connecting a torque converter to the oil pump; and a pilot operated lock-up valve having a torque converter circuit upstream of the main regulator valve of the torque converter circuit. torque· A lock-up clutch control circuit for connecting the inverter's lock-up clutch, and a pilot-operated shift valve, the shift clutch of the torque converter being upstream of the main regulator valve of the torque converter circuit. And a transmission clutch control circuit for connecting the torque converter with a transmission clutch. The drag torque can be interrupted to reduce shift time and starting gear engagement time, especially when the temperature is low, gear shifting is ensured to reduce shift time and starting gear engagement time, and in direct drive, The rotation of the counter shaft This eliminates oil agitation resistance and contributes to low fuel consumption.As a result, the combination of a torque converter with a variable speed clutch is very useful and practical for direct drive transmissions installed in commercial vehicles. is there.

The hydraulic / pneumatic operating device used in the direct drive transmission which combines the torque converter with the speed change clutch of the present invention includes an electromagnetic switching valve, and connects and disconnects the drive gear to and from the input shaft. Transmission to connect the air pressure source to the torque interrupting air cylinder where
A counter drive control circuit, a torque converter circuit that has a main regulator valve upstream and a torque converter regulator valve downstream and connects the torque converter to the oil pump, and pilot operation A lock-up clutch control circuit for connecting a lock-up clutch of the torque converter upstream of the main regulator valve of the torque converter circuit with a lock-up valve being operated, and pilot operated. A variable speed clutch having a variable speed valve and connecting the variable speed clutch of the torque converter upstream of the main regulator valve of the torque converter circuit;
It has a control circuit and an aperture
A high-pressure shift clutch oil spray circuit connected downstream of the shift valve of the control circuit; and a torque converter circuit including a throttle between the main regulator valve and the torque converter regulator valve. Low-pressure side shift clutch connected to
The oil-pneumatic operating device used in the direct drive transmission combined with the torque converter with the shift clutch according to the present invention includes the oil spray circuit, so that the front drag from the counter shaft is interrupted during shifting. The shift time and starting gear engagement time are shortened, and the gear shifting is ensured and the shift time and starting gear engagement time are shortened, particularly at low temperatures, and in the direct drive, the countershaft is reduced. Since the rotation stops, the oil stirring resistance is eliminated, which contributes to low fuel consumption.In addition, the lubrication circuit is simplified, and the required amount of oil for the transmission clutch is changed according to the connection / disconnection state of the transmission clutch. The clutch facing is lubricated, and the high pressure side and low pressure side are independent of each other in the lubrication circuit. Shortens the shift time pressure drop is avoided by the circuit, as a result, the torque with shifting clutch
It is very useful and practical for direct drive transmissions that are installed in commercial vehicles in combination with converters.

Further, a direct drive unit to which the torque converter with a transmission clutch of the present invention is combined.
The hydraulic and pneumatic operating device used in the transmission is equipped with an electromagnetic switching valve, and a transmission counter drive unit that connects a pneumatic source to a torque interrupting air cylinder that couples and disconnects the drive gear to the input shaft. A control circuit, a torque converter circuit that has a main regulator valve on the upstream side and a torque converter regulator valve on the downstream side and connects the torque converter to the oil pump, and a pilot-operated lockup・
A lock-up clutch control circuit comprising a valve and connecting the torque converter lock-up clutch upstream of the main regulator valve of the torque converter circuit; and a pilot operated shift and lubrication valve. A shifting clutch control circuit for connecting the shifting clutch of the torque converter upstream of the main regulator valve of the torque converter circuit via the shifting side of the shifting and lubrication valve; A transmission clutch oil spray circuit connected to the torque converter circuit between the main regulator valve and the torque converter regulator valve via the lubrication side of the lubrication valve; a throttle; Clutch Oh Because and a short circuit connecting the valve outlet to the valve inlet side in Le spray circuit,
In the hydraulic / pneumatic operating device used in the direct drive transmission in which the torque converter with the shift clutch according to the present invention is combined, a counter
The dragging torque on the front side can be interrupted from the shaft to reduce the shifting time and the starting gear engagement time, especially when the temperature is low, the gear engagement is ensured, and the shifting time and the starting gear engagement time are shortened. In the drive, since the rotation of the counter shaft is stopped, oil agitation resistance is eliminated, which contributes to low fuel consumption.In addition, the lubrication circuit is further simplified, and depending on the connection / disconnection state of the transmission clutch. The required amount of oil lubricates the clutch facing of the transmission clutch, and the high-pressure side and the low-pressure side are independent of each other in the lubrication circuit, thereby avoiding pressure drop in the high-pressure circuit and shortening the shift time. For direct drive transmissions that are installed in commercial vehicles by combining a torque converter with a clutch It is always useful and practical.

[Brief description of the drawings]

Fig. 1 Combination of a torque converter with a variable speed clutch in a heavy truck equipped with a turbocharged diesel engine, and a part of a direct drive transmission that is connected to and disconnected from the diesel engine by the torque converter. Break,
A pneumatic circuit of a specific example of a hydraulic / pneumatic operating device used in a direct drive transmission combining a torque converter with a shift clutch of the present invention applied to the direct drive transmission and shown in a sectional view. It is the partial schematic diagram which showed the side.

FIG. 2 is a partial sectional view showing the direct drive transmission shown in FIG. 1 in a partially enlarged manner.

FIG. 3 is a partial longitudinal sectional view showing a torque converter with a speed change clutch combined with the direct drive transmission shown in FIG. 1;

FIG. 4 is a hydraulic circuit diagram showing a hydraulic circuit side of the hydraulic / pneumatic operation device shown in FIG.

FIG. 5 is a hydraulic circuit diagram showing another hydraulic circuit side of the hydraulic / pneumatic operation device of the present invention.

[Explanation of symbols]

11 Transmission counter drive control circuit 12 Torque converter circuit 13 Lock-up clutch control circuit 14 Shift clutch control circuit 15 High pressure side shift clutch oil spray circuit 16 Low pressure side shift clutch oil spray circuit 17 Control Unit 18 Electromagnetic switching valve 21 Main regulator valve 22 Torque converter regulator valve 26 Lock-up valve 30 Lock-up pilot hydraulic circuit 34 Shift valve 38 Shift pilot hydraulic circuit 72 Torque interrupt air cylinder

Claims (6)

[Claims] 1. A transmission counter drive control circuit comprising an electromagnetic switching valve and connecting an air pressure source to a torque interrupting air cylinder for connecting and disconnecting a drive gear to an input shaft, and an upstream side. A torque converter circuit that has a main regulator valve, a torque converter regulator valve on the downstream side, and a torque converter connected to an oil pump, and a pilot operated lock-up valve that has a torque converter. A lock-up clutch control circuit for connecting a lock-up clutch of the torque converter upstream of the main regulator valve of the converter circuit;
With a pilot operated shift valve,
Oil and air used in a direct drive transmission that combines a torque converter with a shifting clutch including a shifting clutch control circuit that connects the shifting clutch of the torque converter upstream of the main regulator valve of the converter circuit Pressure operating device. 2. The lock-up valve is operated with pilot hydraulic pressure guided by an electromagnetic pilot valve from the torque converter circuit upstream of the main regulator valve, and the transmission valve is an electromagnetic pilot valve. 2. A hydraulic air system for use in a direct drive transmission assembling a torque converter with a variable speed clutch as claimed in claim 1, which is operated by a pilot oil pressure derived from the torque converter circuit upstream of the main regulator valve of the torque converter circuit. Pressure operating device. 3. A transmission counter drive control circuit comprising an electromagnetic switching valve and connecting an air pressure source to a torque interrupting air cylinder for connecting and disconnecting a drive gear to an input shaft, and an upstream side. A torque converter circuit that has a main regulator valve, a torque converter regulator valve on the downstream side, and a torque converter connected to an oil pump, and a pilot operated lock-up valve that has a torque converter. A lock-up clutch control circuit for connecting a lock-up clutch of the torque converter upstream of the main regulator valve of the converter circuit;
With a pilot operated shift valve,
A transmission clutch control circuit for connecting the transmission clutch of the torque converter upstream of the main regulator valve of the converter circuit; and a throttle connected downstream of the transmission valve of the transmission clutch control circuit. A high-pressure shift clutch oil spray circuit and a low-pressure shift clutch oil spray having a throttle and connected to the torque converter circuit between its main regulator valve and torque converter regulator valve A hydraulic and pneumatic operating device used in a direct drive transmission that combines a torque converter with a variable speed clutch including a circuit. 4. The lock-up valve is operated by a pilot hydraulic pressure derived from an upstream side of the main regulator valve of the torque converter circuit by an electromagnetic pilot valve, and the transmission valve is an electromagnetic pilot valve. 4. Oil and air used in a direct drive transmission combining a torque converter with a variable speed clutch as claimed in claim 3 operated by pilot hydraulic pressure guided by the torque converter circuit upstream of the main regulator valve of the torque converter circuit. Pressure operating device. 5. A transmission counter drive control circuit comprising an electromagnetic switching valve and connecting an air pressure source to a torque interrupting air cylinder for connecting and disconnecting a drive gear to an input shaft, and an upstream side. A torque converter circuit that has a main regulator valve, a torque converter regulator valve on the downstream side, and a torque converter connected to an oil pump, and a pilot operated lock-up valve that has a torque converter. A lock-up clutch control circuit for connecting a lock-up clutch of the torque converter upstream of the main regulator valve of the converter circuit;
A transmission comprising a pilot operated transmission and lubrication valve and connecting the transmission clutch of the torque converter upstream of the main regulator valve of the torque converter circuit via the transmission side of the transmission and lubrication valve A clutch control circuit and a shifting clutch oil spray circuit connected to the torque converter circuit between the main regulator valve and the torque converter regulator valve via the lubrication side of the shifting and lubrication valve; Oil and air used in a direct drive transmission that combines a torque converter with a variable speed clutch including a throttle, and a short circuit connecting the valve inlet side to the valve outlet side in the variable speed clutch oil spray circuit. Pressure Work equipment. 6. The lock-up valve is operated with pilot hydraulic pressure guided by an electromagnetic pilot valve from the torque converter circuit upstream of the main regulator valve, and the shift and lubrication valve is operated by an electromagnetic pilot valve. 6. A direct drive transmission in combination with a torque converter with a variable speed clutch as claimed in claim 5, which is operated by a pilot valve with pilot pressure guided from the torque converter circuit upstream of the main regulator valve. Hydraulic and pneumatic operating device.