JPH109370A - Hydraulic operating device used for torque converter with shift clutch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mutually set independently a high pressure side and a low pressure side in a lubricating circuit, avoid the pressure lowering of a high pressure circuit, and shorten shift time, by lubricating the clutch facing of a clutch by a low pressure side speed change clutch oil spray circuit only, when the shift clutch is switched off. SOLUTION: This hydraulic operating device is equipped with shift clutch 15 by which the shift clutch 42 of a torque converter 40 is connected to the upstream side of the main regulator valve 12 of a torque converter circuit 11, and comprises a high pressure side shift clutch oil spray circuit 20 equipped with a lock-up valve 16 which is arranged in a lock-up clutch control circuit 14 and pilot-controlled, a speed change valve 18 and a throttle 21, and a low pressure side shift clutch oil spray circuit 22 which is equipped with a throttle 23 and connected to the torque converter circuit 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic operating device used for a torque converter with a transmission clutch.

[0002]

[Background Art] Recently, diesels with turbochargers
Commercial vehicles equipped with engines tend to utilize torque converters having shift clutches and lock-up clutches. Such a diesel engine lacks output torque in the low-speed rotation range and has a disadvantage in acceleration at the time of starting.Therefore, the torque converter is mechanically connected by the lock-up clutch and directly operated. You. The torque converter is supplied with pressure oil in a low-pressure circuit, the lock-up clutch and the transmission clutch are supplied with pressure oil in a high-pressure circuit, and the transmission clutch is provided with an oil spray circuit for clutch facing. Lubricated.

[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. Further, even when the transmission clutch is disengaged, the pressure oil of the high-pressure circuit is used, so that the amount of lubricating oil increases.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lubricating circuit which is capable of securing a required amount of lubricating oil, and which is capable of avoiding a pressure drop in a high-pressure circuit to shorten a shift time. An object of the present invention is to provide a hydraulic operating device used for a torque converter.

[0005]

Means corresponding to the object and the operation thereof
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 the main regulator of the torque converter circuit A lock-up clutch control circuit for connecting the lock-up clutch of the torque converter upstream of the valve, and a transmission clutch of the torque converter upstream of the main regulator valve of the torque converter circuit , A pilot-operated lock-up valve disposed in the lock-up clutch control circuit, and a pilot-operated shift valve disposed in the transmission clutch control circuit. And blanking, a high pressure side shifting clutch oil spray circuit connected to the downstream side of the shift valve of the shifting clutch control circuit includes a diaphragm,
A low pressure side shifting clutch oil spray circuit connected to the torque converter circuit between the main regulator valve and the torque converter regulator valve with a throttle, and the shifting clutch is engaged. When the shift clutch is disengaged, the high-pressure and low-pressure shift clutch oil spray circuits lubricate the clutch facing of the shift clutch, and when the shift clutch is disengaged, the low-pressure shift clutch oil spray Only the circuit lubricates the clutch facing of the shifting clutch.

Further, the present invention provides a torque converter circuit that includes 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 lock-up clutch control circuit for connecting the lock-up clutch of the torque converter upstream of the main regulator valve of the torque converter circuit, and 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 side, and its main regulator
A variable speed clutch oil spray circuit connected to the torque converter circuit between the valve and the torque converter regulator valve, and a pilot operated lockup valve located in the lockup clutch control circuit. And a shift and lubrication valve, which is arranged in the shift clutch control circuit and the shift clutch oil spray circuit and operated by a pilot, and a throttle, and in the shift clutch oil spray circuit, A short circuit connecting the valve outlet side, and when the transmission clutch is engaged, the transmission clutch
Killing the valve inlet side of the oil spray circuit and lubricating the clutch facing of the shift clutch, and making use of the valve inlet side of the shift clutch oil spray circuit when the shift clutch is disengaged. To lubricate the clutch facing of the shifting clutch.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of a hydraulic operating device used in a torque converter with a transmission clutch according to the present invention will be described below with reference to the drawings. FIG.
10 shows a specific example 10 of a hydraulic operating device used in the torque converter with a shift clutch according to the present invention, which is applied to a heavy truck equipped with a turbocharged diesel engine. This hydraulic operating device 10
Has a main regulator valve 12 on the upstream side and a torque converter regulator valve 13 on the downstream side.
And a torque converter circuit 11 for connecting the torque converter 40 to the oil pump 24, and the torque converter 4 upstream of the main regulator valve 12 of the torque converter circuit 11.
A lock-up clutch control circuit 14 for connecting a lock-up clutch (lock-up clutch control cylinder) 41 of 0
A shift clutch (shift clutch control cylinder) 42 of the torque converter 40 is provided upstream of the main regulator valve 12 of the converter circuit 11.
And a lock-up valve 1 arranged in the lock-up clutch control circuit 14 and operated by a pilot.
6, a shift valve 18 arranged in the shift clutch control circuit 15 and operated by a pilot, and a throttle 2
1, a high-pressure side shift clutch oil spray circuit 20 connected downstream of the shift valve 18 of the shift clutch control circuit 15 and a main regulator valve 12 and a torque A low-pressure side shift clutch oil spray circuit 22 is connected between the converter / regulator valve 13 and the torque converter circuit 11.

[0008] The torque converter circuit 11 returns oil from the torque converter 40 to the oil reservoir 25 via the oil cooler 26. The lock-up clutch control circuit 14 has its upstream side shared by the transmission valve 18 and its upstream side of the transmission clutch control circuit 15.

The lock-up valve 16 is connected to a pilot hydraulic chamber 28 from an upstream side of the main regulator valve 12 of the torque converter circuit 11 by a lock-up pilot hydraulic circuit 30 using an electromagnetic pilot valve 17. He and spring 29
Is a spring offset type spool valve which is operated by a pilot hydraulic pressure acting on the spool 27 in opposition to the above. The lock-up pilot hydraulic circuit 30
The pilot hydraulic chamber 28 is connected to the torque converter circuit 11 upstream of the main regulator valve 12, and a throttle 31 is provided on the way, and the electromagnetic pilot valve 17 is connected downstream of the throttle 31. Each is arranged.

The transmission valve 18 is guided by a transmission pilot hydraulic circuit 35 using an electromagnetic pilot valve 19 from the upstream side of the main regulator valve 12 of the torque converter circuit 11 to a pilot hydraulic chamber 33, and Spool 32 against spring 34
This is a spring offset type spool valve that is operated by pilot hydraulic pressure acting on the spool. The shifting pilot hydraulic circuit 35 connects the pilot hydraulic chamber 33 upstream of the main regulator valve 12 of the torque converter circuit 11, and has a throttle 36 in the middle and the electromagnetic pilot valve 19. Are arranged on the downstream side of the throttle 36, respectively. In this case, in the shift pilot hydraulic circuit 35, the upstream side of the throttle 36 is shared with the lock-up pilot hydraulic circuit 30 upstream of the throttle 31.

Next, the clutch of the transmission clutch 42
A description will be given of how the facing 43 is lubricated by the hydraulic operating device 10. As shown in FIG. 1, the solenoid pilot valve 19 is opened to release pilot hydraulic pressure from the pilot hydraulic chamber 33 to the oil reservoir 25, the spool 32 is offset by the spring 34, and When the shift clutch control circuit 15 is utilized and the shift clutch 42 is connected,
The clutch facing 43 is connected to the high-pressure side and low-pressure side shift clutch oil spray circuits 20, 22.
Lubricated. At this time, the high-pressure side and low-pressure side shift clutch oil spray circuits 20, 22 are connected independently of each other without connecting to each other.
3 is lubricated, so that a pressure drop is avoided in the shift clutch control circuit 15, that is, the high pressure circuit, and the shift time is shortened.

Further, the electromagnetic pilot valve 19 is closed and the pilot hydraulic pressure is reduced to the torque converter circuit 11.
From the upstream side of the main regulator valve 12 to the pilot hydraulic chamber 33 and the spool 32
Is operated by the pilot hydraulic pressure against the spring 34, and when the shift clutch control circuit 15 is killed and the shift clutch 42 is disengaged, the high-pressure shift clutch oil spray circuit 20 is activated. The clutch facing 43, which is killed by the transmission clutch control circuit 15, is lubricated only by the low-pressure side transmission clutch oil spray circuit 22. As described above, the hydraulic operating device 10 lubricates the clutch facing 43 of the transmission clutch 42 with a required amount of oil according to the connection / disconnection state of the transmission clutch 42. Further, in the hydraulic operating device 10, the transmission valve is structurally simplified, and the lubrication circuit is simplified.

FIG. 2 shows a specific example 50 of a hydraulic operating device used in the torque converter with a shift clutch according to the present invention, which is applied to a large truck equipped with a turbocharged diesel engine. The hydraulic operating device 50 includes a main regulator valve 12 on the upstream side and a torque converter regulator valve 13 on the downstream side, and includes an oil pump 2.
4, a torque converter circuit 11 for connecting the torque converter 40, and a lock-up clutch (lock-up clutch clutch) of the torque converter 40 on the upstream side of the main regulator valve 12 of the torque converter circuit 11. Lock-up clutch control circuit 1 for connecting control cylinder 41
4 and the main converter of the torque converter circuit 11.
A shift clutch control circuit 15 for connecting a shift clutch (shift clutch control cylinder) 42 of the torque converter 40 to the upstream side of the regulator valve 12, and the main regulator valve 1
2 and torque converter regulator valve 1
3, a shift clutch oil spray circuit 51 connected to the torque converter circuit 11, a lock-up valve 16 arranged in the lock-up clutch control circuit 14 and operated by a pilot,
A shift and lubrication valve 52 arranged in the shift clutch control circuit 15 and the shift clutch oil spray circuit 51 and operated by a pilot, and a throttle 54
And a short circuit 53 that connects the valve outlet side to the valve inlet side in the transmission clutch oil spray circuit 51.

The lock-up clutch control circuit 14 is configured such that the throttle 55 has its lock-up valve 1
6 and the effect of fluctuations in oil pressure when the oil pressure is supplied and discharged by the lock-up valve 16 is reduced.

The transmission and lubrication valve 52 is provided with the transmission valve 18 used in the aforementioned hydraulic operating device 10.
A spring offset type spool valve that adds a function of switching the short circuit 53 to the spool valve. The shift and lubrication valve 52 is moved from the upstream side of the main regulator valve 12 of the torque converter circuit 11 by the shift pilot hydraulic circuit 35 using the electromagnetic pilot valve 19 to the pilot hydraulic chamber 5.
7 and is operated by pilot hydraulic pressure acting on spool 56 against spring 58.

The short circuit 53 is connected to the transmission clutch 4
2 and the transmission clutch 42
In the contact state, a small amount of oil is caused to flow through the clutch facing 43 of the speed change clutch 42 in comparison with the flow rate of the oil passing through the lubrication valve 52.

Next, the clutch of the transmission clutch 42
A description will be given of how the facing 43 is lubricated by the hydraulic operating device 50. As shown in FIG. 2, the solenoid pilot valve 19 is opened and pilot hydraulic pressure is released from the pilot hydraulic chamber 57 to the oil reservoir 25, the spool 56 is offset by the spring 58, and the When the shift clutch control circuit 15 is utilized and the shift clutch 42 is connected,
The clutch facing 43 is lubricated with oil passing through the shift and lubrication valve 52.

Further, the electromagnetic pilot valve 19 is closed and the pilot hydraulic pressure is reduced to the torque converter circuit 11.
From the upstream side of the main regulator valve 12 to the pilot hydraulic chamber 57 and the spool 56
Is operated by the pilot hydraulic pressure against the spring 58, and when the transmission clutch control circuit 15 is killed and the transmission clutch 42 is disengaged, the clutch facing 43 passes through the short circuit 53. Lubricated with oil. As such, the hydraulic operating device 5
0 indicates that the lubrication circuit is simplified by omitting the high-pressure shift clutch oil spray circuit or the low-pressure shift clutch oil spray circuit used in the normal hydraulic operating device, and the shift clutch 42 is disengaged. The clutch facing 43 of the transmission clutch 42 is lubricated with a necessary amount of oil according to the contact state.

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.

[0020]

As will be understood from the above description, the hydraulic operating device used in the torque converter with a transmission clutch of the present invention has a main regulator valve on the upstream side and a torque converter regulator on the downstream side. A torque converter circuit having a valve and connecting a torque converter to an oil pump;
A lock-up clutch control circuit that connects the lock-up clutch of the torque converter upstream of the main regulator valve of the converter circuit, and a lock-up clutch control circuit upstream of the main regulator valve of the torque converter circuit A shift clutch control circuit for connecting the shift clutch of the torque converter, a lock-up valve arranged in the lock-up clutch control circuit and operated by a pilot, and a pilot arranged in the shift clutch control circuit and A shift valve to be operated, a high-pressure shift clutch oil spray circuit having a throttle connected downstream of the shift valve of the shift clutch control circuit, a main regulator valve having a throttle, and G The hydraulic operating device used in the torque converter with a shift clutch according to the present invention includes a low-pressure side shift clutch and an oil spray circuit connected to the torque converter circuit between the torque converter and the regulator valve. , The lubrication circuit is simplified,
Then, the clutch facing of the transmission clutch is lubricated with a necessary amount of oil according to the connection / disconnection state 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. As a result, the shift time is reduced, and as a result, it is very useful and practical for a torque converter with a shift clutch mounted on a commercial vehicle.

The hydraulic operating device used in the torque converter with a transmission clutch according to the present invention includes an oil pump having a main regulator valve on the upstream side and a torque converter regulator valve on the downstream side. A torque converter circuit for connecting a torque converter to the torque converter circuit, a lockup clutch control circuit for connecting a lockup clutch of the torque converter upstream of the main regulator valve of the torque converter circuit, A shift clutch control circuit connecting the shift clutch of the torque converter upstream of the main regulator valve of the torque converter circuit, and between the main regulator valve and the torque converter regulator valve A shift clutch oil spray circuit connected to the torque converter circuit, a lock-up valve arranged in the lock-up clutch control circuit and operated by a pilot, the shift clutch control circuit and the shift clutch It includes a shift and lubrication valve that is pilot operated and located in the oil spray circuit, a throttle, and a short circuit that connects the valve outlet side to the valve inlet side in the shift clutch oil spray circuit. ,
In the hydraulic operating device used in the torque converter with a shift clutch according to the present invention, the lubricating circuit is simplified by omitting the high-pressure side or the low-pressure side of the lubricating circuit provided in a normal hydraulic operating device, and disconnecting the shift clutch. Depending on the contact state, the required amount of oil lubricates the clutch / facing of the shift clutch, avoids pressure drop in the high-pressure circuit, and reduces shift time, resulting in a shift clutch mounted on commercial vehicles Very useful and practical for torque converters.

[Brief description of the drawings]

FIG. 1 is a hydraulic circuit diagram showing a specific example of a hydraulic operating device used in a torque converter with a shift clutch according to the present invention, which is applied to a heavy truck equipped with a diesel engine with a turbocharger.

FIG. 2 is a hydraulic circuit diagram showing a specific example of a hydraulic operating device used in a torque converter with a shift clutch according to the present invention, which is applied to a heavy truck equipped with a turbocharged diesel engine.

[Explanation of symbols]

 Reference Signs List 11 torque converter circuit 14 lock-up clutch control circuit 15 shift clutch control circuit 16 lock-up valve 17 solenoid pilot valve 18 shift valve 19 solenoid pilot valve 20 high-pressure side shift clutch oil spray circuit 21 throttle 22 low-pressure side Transmission clutch, oil spray circuit, 23 throttle

Claims (4)

[Claims] 1. A torque converter circuit comprising: a main regulator valve on an upstream side; and a torque converter regulator valve on a downstream side, for connecting a torque converter to an oil pump;
A lock-up clutch control circuit that connects the lock-up clutch of the torque converter upstream of the main regulator valve of the converter circuit, and a lock-up clutch control circuit upstream of the main regulator valve of the torque converter circuit A shift clutch control circuit for connecting the shift clutch of the torque converter, a lock-up valve arranged in the lock-up clutch control circuit and operated by a pilot, and a pilot arranged in the shift clutch control circuit and A shift valve to be operated, a high-pressure shift clutch oil spray circuit having a throttle connected downstream of the shift valve of the shift clutch control circuit, a main regulator valve having a throttle, and G Click converter regulator hydraulic operation device used gearshift clutch with torque converter including a low-pressure side shifting clutch oil spray circuit connected to the torque converter circuit between the valve. 2. 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 controlled by an electromagnetic pilot valve. 2. The hydraulic operating device used in a torque converter with a variable speed clutch according to claim 1, wherein the hydraulic operating device is operated by pilot hydraulic pressure guided from an upstream side of the main regulator valve of the torque converter circuit. 3. A torque converter circuit, comprising a main regulator valve on the upstream side and a torque converter regulator valve on the downstream side, and connecting a torque converter to an oil pump;
A lock-up clutch control circuit that connects the lock-up clutch of the torque converter upstream of the main regulator valve of the converter circuit, and a lock-up clutch control circuit upstream of the main regulator valve of the torque converter circuit A shift clutch control circuit for connecting the shift clutch of the torque converter, and a shift clutch oil spray circuit connected to the torque converter circuit between the main regulator valve and the torque converter regulator valve And a lock-up valve arranged in the lock-up clutch control circuit and operated by a pilot, and a pilot operated arranged in the shift clutch control circuit and the shift clutch oil spray circuit. Hydraulic pressure used in a torque converter with a variable speed clutch including a variable speed and lubrication valve, a throttle, and a short circuit connecting the valve inlet side to the valve outlet side in the variable speed clutch oil spray circuit. Operating device. 4. The lock-up valve is operated by an electromagnetic pilot valve with pilot oil pressure derived from the torque converter circuit upstream of the main regulator valve, and the transmission valve is operated by an electromagnetic pilot valve. The hydraulic operating device used in the torque converter with a shift clutch according to claim 3, wherein the hydraulic operating device is operated by a pilot oil pressure guided from an upstream side of the main regulator valve of the torque converter circuit.