CN101915305B - Double-gain clutch control system - Google Patents
Double-gain clutch control system Download PDFInfo
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- CN101915305B CN101915305B CN 201010182043 CN201010182043A CN101915305B CN 101915305 B CN101915305 B CN 101915305B CN 201010182043 CN201010182043 CN 201010182043 CN 201010182043 A CN201010182043 A CN 201010182043A CN 101915305 B CN101915305 B CN 101915305B
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Abstract
The invention discloses a double-gain clutch control system of automobiles, which comprises a main pressure source, a variable electromagnetic valve, a clutch regulating valve, a gain control device and a cutch. The clutch is provided with a pressure oil chamber which is connected to the regulating valve oil outlet of the clutch regulating valve through a clutch pressure oil passage; the clutch regulating valve is connected to the main pressure source through an oil-supply oil passage; the gain control device comprises a pressure increasing valve, a trigger pressure oil passage, a clutch control oil passage, a gain control oil passage and an oil outlet, is connected to the clutch regulating valve through the clutch control oil passage and the gain control oil passage and controls the gain of a clutch control pressure according to the signals of the trigger pressure oil passage so that the clutch has a high gain for a high torque and has a low gain for a low torque. Therefore, the automatic gearbox has a high torque range at a low speed and has a better gear-shifting quality at a high speed.
Description
Technical field
The present invention relates to a kind of automatic gearbox of vehicles system, the clutch control in the automatic gearbox of vehicles system particularly is used for controlling the clutch state of automatic transmission case clutch when carrying out gear ratio change.
Background technique
The automatic gearbox of vehicles system generally has a plurality of torque transmitting mechanisms, and namely usually said clutch, by the clutch action of clutch, change the speed ratio of automatic transmission case.When the speed ratio of automatic transmission case was changed, described clutch had the process of skidding, and made the conversion of speed ratio steady, smooth.
Described clutch generally includes one by hydraulically powered piston, and the delivery pressure by a clutch modulating valve provides pressure to it.Described modulating valve is controlled the lifting of this pressure with a kind of control mode, guarantee the steady clutch action of clutch.And the level and smooth clutch action of clutch affects the shift quality of automatic transmission case to a great extent.Therefore, to the accurate control of clutch pressure, most important to shift quality.
At starting or low-grade location when travelling, the suffered resistance of automobile is larger when automobile, and the moment of torsion of automobile dynamic system output is also larger, therefore, need to larger pilot pressure be arranged to clutch.Due to electric liquid element, as the narrow limitation of variable flow solenoid valve or proportional pressure control valve, need to increase a high pressure multiple between Clutch Control pressure and actual clutch pressure, i.e. valve gain.The disengaging performance of clutch and the contradiction between clutch pressure receptance are coordinated in the accurate control of clutch, the most difficult being.Bearing load is higher, need higher valve gain, and higher valve gain can make clutch become more responsive, more difficult control.Along with the market trend that the Engine torque scope constantly increases, this bad coordination result reduces the Clutch Control precision, thereby causes the gearshift degradation when low moment of torsion.
the patent No. is US6591958, the invention people discloses a kind of torque transmitting mechanisms pressure control device (Pressure Control Apparatus for Torque-Transmitting Mechanism) for the U. S. Patent of Steven Patrick Moorman, this pressure control device comprises a main inlet control valve, clutch modulating valve and a pressure charging valve, during gear shift, described clutch modulating valve control torque transfer mechanism pressure rise, and, after gear shift is completed, pressure charging valve improves the pressure from the modulating valve to the torque transmitting mechanisms effectively, make torque transmitting mechanisms that a high pressure be arranged, prevent from skidding.This technological scheme adopts and provides a lower pilot pressure to torque transmitting mechanisms, improves shift quality, then makes the clutch action of clutch reliable with a higher maintenance pressure.But adopt this technological scheme, no matter clutch is at high moment of torsion or low moment of torsion, all adopt the pressure build-up mode of a segmentation.In fact, need the Clutch Control pressure of a high gain during at high moment of torsion when automobile, and during at low moment of torsion, need the Clutch Control pressure of a low gain to reduce the pressure sensibility that high gain is brought when automobile, to guarantee the shift quality when the low moment of torsion.
Summary of the invention
The object of the invention is to solve the contradiction of the high pilot pressure of high moment of torsion and low moment of torsion pressure sensibility for automatic gearbox of vehicles provides a kind of pair of gain automobile clutch control system, improve the shift quality of automobile when low moment of torsion.Conception of the present invention is, it is the main cause of shift quality variation due to clutch pressure receptance, at this moment, should manage to reduce the pilot pressure of clutch when low moment of torsion, the Clutch Control pressure of a low gain namely is provided, reduces the pressure sensibility of clutch, thereby solve the shift quality of automobile when low moment of torsion, and a high gain is provided, make clutch that a higher torque range be arranged when low speed.
Technical solution of the present invention is: two gain automobile clutch control system comprise principal pressure source, variable electromagnetic valve, clutch and regulating valve and clutch; Described clutch is provided with a pressure oil chamber, and it is connected to the modulating valve oil outlet of described clutch and regulating valve by a clutch pressure oil duct, and described clutch and regulating valve is connected to the principal pressure source by a fuel feeding oil duct; Described clutch and regulating valve is controlled the pressure of described pressure oil chamber under Clutch Control pressure is controlled; It also comprises a gain control, and described gain control comprises pressure charging valve, triggers pressure oil duct, Clutch Control pressure oil duct, gain control liquefaction road and drain tap; Described gain control is connected with described clutch and regulating valve, and according to the signal of described triggering pressure oil duct, the gain of described Clutch Control pressure is controlled; When the pressure of described triggering pressure oil duct during lower than a preset pressure, described pressure charging valve makes described gain control liquefaction road be communicated with described Clutch Control pressure oil duct, thereby increase the pressure in described gain control liquefaction road, pressure to described Clutch Control pressure oil duct carries out balance, makes described clutch pressure oil duct be in a low gain state; When the pressure of described triggering pressure oil duct during higher than a preset pressure, described pressure charging valve makes described gain control liquefaction road disconnect and be communicated with drain tap with described Clutch Control pressure oil duct, thereby reduce the pressure in described gain control liquefaction road, increase the pressure ratio of described Clutch Control pressure oil duct and clutch pressure oil duct, make described clutch pressure oil duct be in a high gain state.
As a preferred embodiment of the present invention, described pressure charging valve comprises supercharging valve body, supercharging valve rod and pressure charging valve spring; Be provided with pressure charging valve the first undercut groove, pressure charging valve the second undercut groove, pressure charging valve the 3rd undercut groove and pressure charging valve the 4th undercut groove in described supercharging valve body, described pressure charging valve the first undercut groove, pressure charging valve the second undercut groove and pressure charging valve the 3rd undercut groove are connected respectively on described triggering pressure oil duct, Clutch Control pressure oil duct and gain control liquefaction road, and described pressure charging valve the 4th undercut groove is communicated with drain tap; Be provided with pressure charging valve the first shoulder and pressure charging valve the second shoulder on described supercharging valve rod, be provided with a pressure charging valve annular groove between described pressure charging valve the first shoulder and pressure charging valve the second shoulder; Described pressure charging valve spring is arranged in described supercharging valve body and acts on an end face of described pressure charging valve the second shoulder.When the pressure of described triggering pressure oil duct during lower than a preset pressure, increase that described gain control liquefaction road is communicated with described Clutch Control pressure oil duct and disconnect with described drain tap, described Clutch Control pressure produces a balance pressure by described gain control liquefaction road to the described Clutch Control pressure that acts on described modulating valve, thereby advance the speed to the pressure of described clutch pressure oil duct in minimizing principal pressure source, that is, make described clutch pressure oil duct be in a low gain state; When the pressure of described triggering pressure oil duct during higher than a preset pressure, described pressure charging valve makes described gain control liquefaction road disconnect and be communicated with described drain tap with described Clutch Control pressure oil duct, the equilibratory pressure of described Clutch Control pressure oil duct pressure is passed through the drain tap release, thereby increased the pressure ratio of described Clutch Control pressure oil duct and clutch pressure oil duct, having accelerated the principal pressure source increases the pressure of described clutch pressure oil duct, that is, make described clutch pressure oil duct be in a high gain state.
As a preferred embodiment of the present invention, described clutch and regulating valve comprises regulation valve body and regulates valve rod; Also be provided with modulating valve the 3rd shoulder and modulating valve the 4th shoulder on described adjusting valve rod; Described modulating valve the 3rd shoulder is adjacent with described modulating valve the second shoulder and have an identical diameter; Described modulating valve the 4th shoulder is adjacent to described modulating valve the 3rd shoulder and have diameter greater than described modulating valve the 3rd shoulder; Form a pressure reduction zone, described gain control liquefaction road and this regional connectivity at the adjacent of described modulating valve the 4th shoulder and modulating valve the 3rd shoulder.
As a preferred embodiment of the present invention, also be provided with a pressure feedback undercut groove and be communicated with described clutch pressure oil duct by a pressure feedback oil duct on described regulation valve body, when the pressure of described clutch pressure oil duct surpasses predefined value, regulate by this feedback oil duct and described modulating valve.
Description of drawings
Fig. 1 is hydraulic control circuit figure of the present invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Referring to Fig. 1, two gain automobile clutch control system comprise principal pressure source 1, variable electromagnetic valve 2, modulating valve 3, pressure charging valve 4 and clutch 5; Described clutch is provided with a pressure oil chamber 5a, and it is connected to the oil outlet of described modulating valve 3 by a clutch pressure oil duct 7, and described modulating valve 3 is connected to principal pressure source 1 by a fuel feeding oil duct 6; Described clutch and regulating valve 3 is controlled the pressure of described pressure oil chamber 5a under Clutch Control pressure 8 is controlled.
Described clutch and regulating valve 3 comprises modulating valve valve body 3n, modulating valve valve rod 3o and modulating valve spring 3m, and described modulating valve valve body 3n is provided with the modulating valve valve opening, and described modulating valve valve rod 3o is engaged in described modulating valve valve opening slidably; Described modulating valve valve rod 3o is provided with modulating valve the first shoulder 3a, modulating valve the second shoulder 3b, modulating valve the 3rd shoulder 3c and modulating valve the 4th shoulder 3d, be provided with modulating valve the first annular groove 3k between described modulating valve the first shoulder 3a and modulating valve the second shoulder 3b, described modulating valve the second shoulder 3b, modulating valve the 3rd shoulder 3c are adjacent successively with modulating valve the 4th shoulder 3d; Described modulating valve the first shoulder 3a, modulating valve the second shoulder 3b are identical with the diameter of modulating valve the 3rd shoulder 3c, all less than described modulating valve the 4th shoulder 3d.Form a pressure reduction zone 3l at described modulating valve the 3rd shoulder 3c and modulating valve the 4th shoulder 3d adjacent.Be provided with modulating valve the first undercut groove 3e, modulating valve the second undercut groove 3f, modulating valve the 3rd undercut groove 3g, modulating valve the 4th undercut groove 3h, modulating valve the 5th undercut groove 3i and modulating valve the 6th undercut groove 3j in described modulating valve valve body 3n; Be connected with fuel feeding oil duct 6 on described modulating valve the first undercut groove 3e, be connected with clutch pressure oil duct 7 on described modulating valve the second undercut groove 3f, be connected with drain tap on described modulating valve the 3rd undercut groove 3g, be connected with gain control liquefaction road 9 on described modulating valve the 4th undercut groove 3h, be connected with Clutch Control pressure oil duct 8 on described modulating valve the 5th undercut groove 3i, be connected with pressure feedback oil duct 11 on described modulating valve the 6th undercut groove 3j.Described modulating valve spring 3m is arranged in described modulating valve valve body 3n and acts on the end face of described modulating valve the first shoulder 3a, and this end face forms a modulating valve return 3p of grease chamber and is communicated with described modulating valve the 6th undercut groove 3j with described modulating valve valve body.
Described gain control comprises pressure charging valve 4, triggers pressure oil duct 10, gain control liquefaction road 9 and Clutch Control pressure oil duct 8, and they are connected with Clutch Control pressure oil duct by described gain control liquefaction road 9 and are connected with described clutch and regulating valve 3 and according to the signal of described triggering pressure oil duct 10, the gain of described Clutch Control pressure are controlled.Described pressure charging valve 4 is when the pressure of described triggering pressure oil duct 10 during lower than a preset pressure, the pressure that increases described gain control liquefaction road 9 carries out balance to the described pressure that is connected to the Clutch Control pressure oil duct 8 on modulating valve 3, makes described clutch pressure oil duct 7 be in a low gain state; Described pressure charging valve 4 is when the pressure of described triggering pressure oil duct 10 during higher than a preset pressure, reduce the pressure in described gain control liquefaction road 9, increase the pressure ratio of described Clutch Control pressure oil duct 8 and clutch pressure oil duct 7, make described clutch pressure oil duct 7 be in a high gain state.
Described pressure charging valve 4 comprises supercharging valve body 4i, supercharging valve rod 4j and pressure charging valve spring 4h; Be provided with pressure charging valve the first undercut groove 4c, pressure charging valve the second undercut groove 4d, pressure charging valve the 3rd undercut groove 4e and pressure charging valve the 4th undercut groove 4f in described supercharging valve body 4i, described pressure charging valve the first undercut groove 4c, pressure charging valve the second undercut groove 4d and pressure charging valve the 3rd undercut groove 4e are connected respectively on described triggering pressure oil duct 10, Clutch Control pressure oil duct 8 and gain control liquefaction road 9, and described pressure charging valve the 4th undercut groove 4f is communicated with drain tap; Be provided with pressure charging valve the first shoulder 4a and pressure charging valve the second shoulder 4b on described supercharging valve rod 4j, be provided with a pressure charging valve annular groove 4g between described pressure charging valve the first shoulder 4a and pressure charging valve the second shoulder 4b; Described pressure charging valve spring 4h is arranged in described supercharging valve body 4i and acts on the end face of described pressure charging valve the second shoulder 4b.
Also be connected with proportional control valve 12 and variable electromagnetic valve 2 on described Clutch Control pressure oil duct 8, described variable electromagnetic valve 2 is controlled described Clutch Control pressure oil duct 8 upward pressures according to the signal of system, thereby the pressure by 3 couples of described clutch pressure 5a of grease chamber of described modulating valve is controlled, the gear switch when realizing the automobile power transmission.
Described modulating valve 3 is when original state, the pressure of described Clutch Control pressure oil duct 8 and described at modulating valve spring 3m with from the balance of making a concerted effort to keep of the feedback pressure of clutch pressure feedback oil duct 11, when described Clutch Control pressure 8 during greater than described make a concerted effort, described fuel feeding oil duct 6 is connected with described clutch pressure oil duct 7, and has different rate of pressure rises according to the big or small degree of its open communication.
the pressure charging valve spring 4h and 10 pressure balances of described triggering pressure oil duct that arrange in described pressure charging valve valve body 4i have a thresholding predefined value, described Clutch Control pressure oil duct 8 is communicated with described gain control liquefaction road 9, due to the existence at described pressure reduction zone 3l, described pressure-acting of coming by gain control liquefaction road 9 is on this pressure reduction zone 3l, in fact reduced the described pressure that acts on the Clutch Control pressure oil duct 8 on described modulating valve the 4th shoulder 3d end face, this will reduce the pressure ratio of described clutch pressure oil duct 7 pressure and described Clutch Control pressure oil duct 8 pressure, and when the pressure of described triggering pressure oil duct 10 during greater than pressure charging valve spring 4h power, described supercharging valve rod 4j move to right (by direction as shown), described gain control liquefaction road 9 and described Clutch Control pressure oil duct 8 are disconnected, and be communicated with the drain tap of described pressure charging valve 4, thereby the pressure that acts on described adjusting valve differential pressure zone 3l is reduced, also namely in fact increased the pressure ratio of described clutch pressure oil duct 7 pressure and described Clutch Control pressure oil duct 8 pressure.
Specific embodiment is in order more clearly to understand the present invention, not as a kind of restriction to right of the present invention, under the prerequisite that does not break away from aim of the present invention, all these various variations can be arranged, within will be included in the scope of this claim to the apparent modification of described those skilled in the art.
Claims (4)
1. two gain automobile clutch control system comprise principal pressure source, variable electromagnetic valve, clutch and regulating valve and clutch; Described clutch is provided with a pressure oil chamber, and it is connected to the modulating valve oil outlet of described clutch and regulating valve by a clutch pressure oil duct, and described clutch and regulating valve is connected to the principal pressure source by a fuel feeding oil duct; Described clutch and regulating valve is controlled the pressure of described pressure oil chamber under Clutch Control pressure is controlled; It is characterized in that: it also comprises a gain control, and described gain control comprises pressure charging valve, triggers pressure oil duct, Clutch Control pressure oil duct, gain control liquefaction road and drain tap; Described gain control is connected with described clutch and regulating valve, and according to the signal of described triggering pressure oil duct, the gain of described Clutch Control pressure is controlled; When the pressure of described triggering pressure oil duct during lower than a preset pressure, described pressure charging valve makes described gain control liquefaction road be communicated with described Clutch Control pressure oil duct, thereby increase the pressure in described gain control liquefaction road, pressure to described Clutch Control pressure oil duct carries out balance, makes described clutch pressure oil duct be in a low gain state; When the pressure of described triggering pressure oil duct during higher than a preset pressure, described pressure charging valve makes described gain control liquefaction road disconnect and be communicated with drain tap with described Clutch Control pressure oil duct, thereby reduce the pressure in described gain control liquefaction road, increase the pressure ratio of described Clutch Control pressure oil duct and clutch pressure oil duct, make described clutch pressure oil duct be in a high gain state.
2. according to claim 1 pair of gain automobile clutch control system, it is characterized in that: described pressure charging valve comprises supercharging valve body, supercharging valve rod and pressure charging valve spring; Be provided with pressure charging valve the first undercut groove, pressure charging valve the second undercut groove, pressure charging valve the 3rd undercut groove and pressure charging valve the 4th undercut groove in described supercharging valve body, described pressure charging valve the first undercut groove, pressure charging valve the second undercut groove and pressure charging valve the 3rd undercut groove are connected respectively on described triggering pressure oil duct, Clutch Control pressure oil duct and gain control liquefaction road, and described pressure charging valve the 4th undercut groove is communicated with drain tap; Be provided with pressure charging valve the first shoulder and pressure charging valve the second shoulder on described supercharging valve rod, be provided with a pressure charging valve annular groove between described pressure charging valve the first shoulder and pressure charging valve the second shoulder; Described pressure charging valve spring is arranged in described supercharging valve body and acts on an end face of described pressure charging valve the second shoulder.
3. according to claim 1 and 2 pair of gain automobile clutch control system is characterized in that: described clutch and regulating valve comprises regulation valve body and regulates valve rod; Described adjusting valve rod is provided with modulating valve the first shoulder, modulating valve the second shoulder, modulating valve the 3rd shoulder and modulating valve the 4th shoulder, be provided with modulating valve the first annular groove between described modulating valve the first shoulder and modulating valve the second shoulder, described modulating valve the second shoulder, modulating valve the 3rd shoulder are adjacent successively with modulating valve the 4th shoulder; Described modulating valve the first shoulder, modulating valve the second shoulder are identical with the diameter of modulating valve the 3rd shoulder, all less than described modulating valve the 4th shoulder; Adjacent at described modulating valve the 4th shoulder and modulating valve the 3rd shoulder forms pressure reduction zone, described gain control liquefaction road and this pressure reduction regional connectivity.
4. according to claim 3 pair of gain automobile clutch control system, it is characterized in that: also be provided with a pressure feedback undercut groove and be communicated with described clutch pressure oil duct by a pressure feedback oil duct on described regulation valve body, when the pressure of described clutch pressure oil duct surpasses predefined value, regulate by this feedback oil duct and described modulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010182043 CN101915305B (en) | 2010-05-25 | 2010-05-25 | Double-gain clutch control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010182043 CN101915305B (en) | 2010-05-25 | 2010-05-25 | Double-gain clutch control system |
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| CN101915305A CN101915305A (en) | 2010-12-15 |
| CN101915305B true CN101915305B (en) | 2013-11-06 |
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| CN 201010182043 Active CN101915305B (en) | 2010-05-25 | 2010-05-25 | Double-gain clutch control system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9062782B2 (en) * | 2013-01-03 | 2015-06-23 | Ford Global Technologies, Llc | Hydraulic gain of transmission control elements |
| EP3099953B1 (en) * | 2014-01-30 | 2019-03-13 | BorgWarner Inc. | Dual gain friction clutch |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4188839A (en) * | 1978-02-17 | 1980-02-19 | Toyota Jidosha Kogyo Kabushiki Kaisha | Throttling control valve and a system for controlling downshift timing of an automatic transmission for vehicles |
| US6591958B1 (en) * | 2002-03-07 | 2003-07-15 | General Motors Corporation | Pressure control apparatus for a torque-transmitting mechanism |
| CN1540189A (en) * | 2003-04-21 | 2004-10-27 | �����Զ�����ʽ���� | Fluid pressure control loop |
| CN101004217A (en) * | 2006-01-17 | 2007-07-25 | 通用汽车公司 | Apparatus and method for reducing engine load at stop |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3074216B2 (en) * | 1992-04-20 | 2000-08-07 | マツダ株式会社 | Control device for automatic transmission |
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2010
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4188839A (en) * | 1978-02-17 | 1980-02-19 | Toyota Jidosha Kogyo Kabushiki Kaisha | Throttling control valve and a system for controlling downshift timing of an automatic transmission for vehicles |
| US6591958B1 (en) * | 2002-03-07 | 2003-07-15 | General Motors Corporation | Pressure control apparatus for a torque-transmitting mechanism |
| CN1540189A (en) * | 2003-04-21 | 2004-10-27 | �����Զ�����ʽ���� | Fluid pressure control loop |
| CN101004217A (en) * | 2006-01-17 | 2007-07-25 | 通用汽车公司 | Apparatus and method for reducing engine load at stop |
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| CN101915305A (en) | 2010-12-15 |
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