CN102537314B - Main oil pressure control method for automatic transmission - Google Patents
Main oil pressure control method for automatic transmission Download PDFInfo
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- CN102537314B CN102537314B CN201110345574.9A CN201110345574A CN102537314B CN 102537314 B CN102537314 B CN 102537314B CN 201110345574 A CN201110345574 A CN 201110345574A CN 102537314 B CN102537314 B CN 102537314B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000003745 diagnosis Methods 0.000 claims description 19
- 238000012886 linear function Methods 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- FNMKZDDKPDBYJM-UHFFFAOYSA-N 3-(1,3-benzodioxol-5-yl)-7-(3-methylbut-2-enoxy)chromen-4-one Chemical compound C1=C2OCOC2=CC(C2=COC=3C(C2=O)=CC=C(C=3)OCC=C(C)C)=C1 FNMKZDDKPDBYJM-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Abstract
The invention relates to a main oil pressure control method for an automatic transmission, which can be used for selecting proper oil pressure according to different conditions. The proper main oil pressure value is determined by judging parameters such as the state of the transmission, main oil pressure needed by a current gear, main oil pressure needed by a hot mode, main oil pressure needed by a high-speed mode, main oil pressure needed by a specific mode and the like, so that sufficient lubrication is realized, and the efficiency of the automatic transmission can be ensured. The main oil pressure control method is applied to all automotive automatic transmissions.
Description
Technical field
The present invention relates to a kind of hydraulic control method, especially relate to a kind of main oil pressure control method of automatic gearbox.
Background technique
Hydraulic transmission is widely used in automotive industry.Hydraulicdriven application in car transmissions is one of them main application.In this type systematic, oil pressure is a main control target, but according to the service condition of solenoid valve, pressure control is different again.Pressure control is also the pith that this type systematic reaches a suitable performance.
In automatic gearbox system, the control of electronic controlled transmission is mainly also the pressure that is used to control hydraulic circuit.Pressure control in hydraulic system is mainly the control that is used to control different units in automatic transmission, comprises planetary engagement.Although change with manual transmission and be not quite similar as epicyclic gear system states such as gear selection, gear shift, by the combination of different planetary gear set, Transmission System just can be realized the gear shift function identical with manual transmission.
In general, automatic gearbox for vehicle has several gears, the gear ratio of advancing or retreating desired transmission input shaft and output shaft to realize vehicle.Vehicle, under different operating modes, is different to the demand of main oil pressure value.In order to improve fuel economy, raise the efficiency, should reduce main oil pressure value, to improve oil pump efficiency.But oil pressure reduces, and likely causes that the cunning of clutch friction plate is rubbed, and causes efficiency lower, therefore, still need to keep a specific pressure, under the prerequisite that meets function, raises the efficiency.The control of this pressure is also generally to depend on the input torque of speed changer and some other condition.
As everyone knows, the Clutch Control of automatic transmission plays vital effect in vehicle drive process, and convenience and travelling comfort when its performance quality and driver drive are closely related.In the time that automatic transmission main oil pressure value is too low, cause that clutch friction plate cunning rubs, enough lubricant oil cannot be provided, too high when oil pressure, oil pump Efficiency Decreasing, can affect the efficiency of automatic transmission.Therefore, need under different situations, different conditions, adopt different main oil pressure values, to reach travelling comfort, the Economy of driving, improve the optimum efficiency of transmission efficiency simultaneously.
Summary of the invention
The present invention solves the technical problem that the existing main oil pressure value of prior art is difficult to the demand that adapts to different situations, provide a kind of suitable main oil pressure value can be provided under different situations, enough lubrications are provided, can ensure again the automatic transmission main oil pressure control method of the efficiency of automatic transmission.
The present invention is directed to above-mentioned technical problem is mainly solved by following technical proposals: a kind of main oil pressure control method of automatic transmission, regulate the main oil pressure value of speed changer inside for the control module of automatic transmission, control module stores normality oil pressure value, oil pressure minimum value, oil pressure maximum value, fault diagnosis oil pressure value and gearshift management oil pressure value, and main oil pressure control comprises the following steps:
Step 1, control module judge automatic transmission current be whether gearshift fault diagnosis state, if so, that is: automatic transmission is in the time of gearshift fault diagnosis state, control module to main oil pressure value, and proceeds to step 4 by fault diagnosis oil pressure value assignment; If not, proceed to step 2;
Step 2, control module judge that automatic transmission is current whether in gearshift controlled state, and if so, that is: automatic transmission is in the time of gearshift controlled state, and control module will be shifted gears management oil pressure value assignment to main oil pressure value, and proceed to step 4; If not, proceed to step 3;
Step 3, control module by normality oil pressure value assignment to main oil pressure value;
Step 4, control module judges whether main oil pressure value is less than oil pressure minimum value, if so, that is: main oil pressure value is less than oil pressure minimum value, again by oil pressure minimum value assignment to main oil pressure value, and proceed to step 1, repeat above-mentioned circulation; If not, main oil pressure value is constant, and proceeds to step 5;
Step 5, control module judges whether main oil pressure value is greater than oil pressure maximum value, if so, that is: main oil pressure value is greater than oil pressure maximum value, again by oil pressure maximum value assignment to main oil pressure value; If not, main oil pressure value is constant, and proceeds to step 1, repeats above-mentioned circulation.
Control module constantly repeats above-mentioned circulation, adjusts in real time the main oil pressure value of automatic transmission.
As preferably, in described step 3, normality oil pressure value is definite according to the main oil pressure of the main oil pressure of the main oil pressure of the main oil pressure of current gear demand, heat pattern demand, fast mode demand and AD HOC demand, and described normality oil pressure is the maximum value in above-mentioned four main oil pressures.
As preferably, the main oil pressure of current gear demand is obtained by following linear function:
P
_gear=mτ
Input+P
0
In formula, P
_ gearfor the main oil pressure of current gear demand, τ
inputfor the moment of torsion input of clutch, m is current clutch moment of torque oil pressure coefficient, P
0for the demand oil pressure side-play amount of the corresponding clutch of current gear, for each range state, moment of torsion oil pressure coefficient and side-play amount are calibration value.
As preferably, in the situation of multiple clutches, each clutch calculates the main oil pressure of demand separately, and the maximum value of then getting is wherein the main oil pressure of current gear demand.
As preferably, in described control module, store the minimum oil pressure of heat pattern, in the time that heat pattern activates, the main oil pressure of setting heat pattern demand is the minimum oil pressure of heat pattern; In the time of heat pattern un-activation, the main oil pressure of setting heat pattern demand is 0.
As preferably, described control module stores rated engine speed and the minimum oil pressure of high rotating speed, when the main oil pressure of engine speed setting high-speed mode requirement during higher than rated engine speed is the minimum oil pressure of high rotating speed; When engine speed is not during higher than rated engine speed, the main oil pressure of setting high-speed mode requirement is 0.
As preferably, described control module stores AD HOC oil pressure, and when vehicle is in starting, garage gearshift situation lower time, the main oil pressure of setting AD HOC demand is AD HOC oil pressure, and the main oil pressure of other times AD HOC demand is 0.
As preferably, the peaked variance ratio of the maximum value in four main oil pressures and a upper circulation is less than 1500bar/s.Variance ratio be twice maximum value difference and twice cycle time interval ratio, reacted the pace of change of main oil pressure.Suitable pace of change can guarantee to drive the fluency of manipulation.According to the upper limit that can adjust changing value under different situations, general span is 4-1500bar/s.
The substantial effect that the present invention brings is, 1, the present invention adopts the controlling method of main oil pressure strategy, makes the function of automatic transmission fluid pressure-controlled more perfect.
2, the present invention increases main oil pressure strategy, makes automatic transmission different in the situation that, adopt different main oil pressures, has improved transmission efficiency.
3, the strategy based on " oil pressure range of set value " of the present invention, adopts the maximin restriction of oil pressure, has prevented the excessive too small damage that may cause Transmission System of speed changer oil pressure.
4, the main oil pressure control method of automatic transmission of the present invention, has set the maximum value of oil pressure variance ratio, has prevented oil pressure sudden change, has protected system parts, main oil pressure the fluctuate vibration and the impact that bring when having avoided gear shift, starting and normally having travelled.
5, main oil pressure control method of the present invention, is applicable to various types of wet-type double-clutch automatic speed-change devices and AT automatic transmission.
Brief description of the drawings
Fig. 1 is that a kind of main oil pressure of the present invention is determined method flow diagram;
Fig. 2 and Fig. 3 are that a kind of normality oil pressure of the present invention is determined method flow diagram.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technological scheme of the present invention is described in further detail.
Embodiment: the controlling method of a kind of automatic transmission of the present embodiment, be applied to planet row type electricity liquid automatic transmission, in the working procedure of automatic transmission, this controlling method can be according to different gears and the needed main oil pressure of condition calculating, main oil pressure request under different situations is processed simultaneously, this controlling method comprises by range state to be determined, heat pattern, high pressure demand, in the minimum main oil pressure demand that high rotating speed is determined, choose maximum value, in the time there is no the definite main oil pressure of gear shift management and gear shift fault diagnosis, adopt this maximum value as system main oil pressure, in the time having the definite main oil pressure of gear shift management and gear shift fault diagnosis, do not adopt above-mentioned maximum value, adopt the definite main oil pressure of gear shift fault diagnosis (in the time there is no fault diagnosis, adopt gear shift management oil pressure as main oil pressure).
In the process of automatic transmission work, different control module in automatic transmission, different control functions are different to the demand of oil pressure, in order to meet the requirement of modules function, need to control main oil pressure Pmain.
The deterministic process of Pmain comprises the steps.
Main oil pressure control comprises the following steps:
Step 1, control module judge automatic transmission current be whether gearshift fault diagnosis state, if so, that is: automatic transmission is in the time of gearshift fault diagnosis state, control module to main oil pressure value, and proceeds to step 4 by fault diagnosis oil pressure value assignment; If not, proceed to step 2;
Step 2, control module judge that automatic transmission is current whether in gearshift controlled state, and if so, that is: automatic transmission is in the time of gearshift controlled state, and control module will be shifted gears management oil pressure value assignment to main oil pressure value, and proceed to step 4; If not, proceed to step 3;
Step 3, control module by normality oil pressure value assignment to main oil pressure value;
Step 4, control module judges whether main oil pressure value is less than oil pressure minimum value, if so, that is: main oil pressure value is less than oil pressure minimum value, again by oil pressure minimum value assignment to main oil pressure value, and proceed to step 1, repeat above-mentioned circulation; If not, main oil pressure value is constant, and proceeds to step 5;
Step 5, control module judges whether main oil pressure value is greater than oil pressure maximum value, if so, that is: main oil pressure value is greater than oil pressure maximum value, again by oil pressure maximum value assignment to main oil pressure value; If not, main oil pressure value is constant, and proceeds to step 1, repeats above-mentioned circulation.
Described operating method step 3, normality oil pressure value is definite according to the main oil pressure of the main oil pressure of the main oil pressure of the main oil pressure of current gear demand, heat pattern demand, fast mode demand and AD HOC demand, and normality oil pressure value is the maximum value in above-mentioned four main oil pressures.
The main oil pressure of current gear demand calculates with following linear function according to the input torque of speed changer:
P
_gear=mτ
Input+P
0
P
_ gearthe main oil pressure of current gear demand
τ
inputmoment of torsion input
The moment of torsion oil pressure coefficient that m is current
For each range state, moment of torsion oil pressure coefficient and side-play amount are calibration value.
More than the oil pressure demand of single clutch, for automatic transmission, the clutch of simultaneously working may have 2 even more.For the situation of two clutches, the main oil pressure that adopts two clutches to need calculates respectively, gets maximum value.As shown in the formula.
P
_gear = max ( m
1|τ
Input| + p
1,m
2|τ
Input| + p
2)
In step 3, also comprise heat pattern main oil pressure Location of requirement.In order to improve the flow of lubrication, in the time that heat pattern activates, by minimum essential requirement oil pressure assignment to heat pattern main oil pressure.In the time that heat pattern does not activate, heat pattern main oil pressure demand is 0.
Step 3 also comprises the main oil pressure demand of AD HOC.In the situations such as starting, garage gear shift, have high pressure demand, these high pressure requirements are calibration value, and synchronization, only have a kind of state to activate, and in the time that state activates, the main oil pressure demand of AD HOC is assigned the corresponding calibration value of state; In the time that these patterns do not activate, AD HOC main oil pressure demand is 0.
Step 3 also comprises main oil pressure Location of requirement under high rotating speed pattern, when engine speed is during higher than certain rated engine speed, overheated in order to prevent speed changer, gives main oil pressure under high rotating speed pattern by minimum main oil pressure value assignment corresponding under maximum speed.
Step 3 also comprises definite main oil pressure under comparison AD HOC, range state, high rotating speed pattern, heat pattern, using the oil pressure maximum value of demand under above-mentioned each pattern as main oil pressure.
Step 3 also comprises for the maximum main oil pressure of determining, limits its variance ratio.Be each program cycle cycle, can not make oil pressure demand have excessive fluctuation.In the time that this demand oil pressure is greater than last definite demand oil pressure, oil pressure increment can only be less than setting value.
As shown in Figure 1, Figure 2 and Figure 3, the definite flow process of described main oil pressure comprises:
(1) carry out main oil pressure and determine the order 101 starting, and then enter the gearshift fault diagnosis request 102 that judged whether;
(2) in the time having judged whether the request 102 of gearshift fault diagnosis, if there is the request of gearshift fault, main oil pressure Pmain equals fault diagnosis state oil pressure P_SHMD 103, if do not shift gears fault request, has judged whether gearshift request 104;
(3) judging whether gearshift request 104 o'clock, if there is gearshift request, main oil pressure Pmain equals gearshift management oil pressure P_SHM 105; If do not shift gears request, the main oil pressure entering under normal circumstances determines 201;
(4) main oil pressure under normal circumstances determines that 201 comprise the following steps, first calculate speed changer input torque 202, then detect work at present gear 203, then give the first intermediate variable P1 204 by the oil pressure demand P_gear assignment being determined by current range state, then judge whether to meet the condition 205 that enters heat pattern;
(5) meet while entering the condition 205 of heat pattern judging whether, if meet the oil pressure demand P_Hot_model 207 that makes the second variable P2 equal to be determined by heat pattern; If do not meet the condition that enters heat pattern, the oil pressure demand P_Hot_model that Schilling is determined by heat pattern is 0 206, the oil pressure demand P_Hot_model 207 that then makes the second variable P2 equal to be determined by heat pattern;
After the oil pressure demand P_Hot_model 207 that (6) second variable P2 equal to be determined by heat pattern, judge whether to meet and enter high rotating speed mode condition 208, if meet the oil pressure demand P_high_speed 210 that makes ternary P3 equal to be determined by fast mode; If do not meet and enter high rotating speed mode condition, the oil pressure demand P_high_speed that Schilling is determined by fast mode is 0 209, the oil pressure demand P_high_speed 210 that then makes ternary P3 equal to be determined by fast mode;
After the oil pressure demand P_high_speed 210 that (7) ternary P3 equal to be determined by fast mode, judge whether to meet the AD HOC condition 211 that enters, if met, the oil pressure demand P_special_model 213 that makes the 4th variable P4 equal to be determined by special pattern, then enters step 214; If do not meet the AD HOC condition that enters, the oil pressure demand P_special_model 212 that Schilling is determined by special pattern, the oil pressure demand P_special_model that then makes the 4th variable P4 equal to be determined by special pattern, then enters step 214;
(8) after having determined the value of P1, P2, P3 and tetra-variablees of P4, the relatively size of P1, P2, P3, P4, the maximum value of getting is wherein P1max 214, whether the variance ratio that then judges the variable maximum P1max of current circulation and the variable maximum P1max_previous of a upper circulation is greater than predefined value K 215, and variance ratio formula is:
Variance ratio=| (P1max-P1max_previous) |/s
K is made as 1500bar/s, and can adjust as required; If variance ratio is less than or equal to K, make normality oil pressure P5 equal P1max 217, then enter step 218; If variance ratio is greater than K, and the variable maximum P1max of current circulation be greater than one circulation variable maximum P1max_previous, make normality oil pressure P5 equal P1max_previous+t*K, then enter step 218; If variance ratio is greater than K, and the variable maximum P1max of current circulation be less than one circulation variable maximum P1max_previous, make normality oil pressure P5 equal P1max_previous-t*K, then enter step 218;
(9) make main oil pressure Pmain equal normality oil pressure P5, and enter step 107;
(10) after obtaining main oil pressure Pmain 107, judge whether main oil pressure Pmain is less than the oil pressure minimum value Pmin 108 of setting, if so, make main oil pressure Pmain equal oil pressure minimum value Pmin 109, then jump to step 101; If main oil pressure Pmain is more than or equal to the oil pressure minimum value Pmin of setting, judge whether main oil pressure Pmain is greater than the oil pressure maximum value Pmax 111 of setting;
(11) judge when whether main oil pressure Pmain is greater than the oil pressure maximum value Pmax of setting 111, if main oil pressure Pmain is greater than the oil pressure maximum value Pmax of setting, make main oil pressure Pmain equal oil pressure maximum value Pmax 109, then jump to step 101; If main oil pressure Pmain is less than or equal to the oil pressure maximum value Pmax of setting, jump to step 101.
Variable declaration:
Pmax oil pressure maximum value
Pmin oil pressure minimum value
The oil pressure demand that P_gear is determined by current range state
The oil pressure demand that P_Hot_model is determined by heat pattern
The oil pressure demand that P_special_model is determined by special pattern
The oil pressure demand that P_high_speed is determined by fast mode
Oil pressure maximum value in the each pattern of P1max
P1max_previous upper one main oil pressure obtaining that circulates
P1, P2, P3, P4 intermediate variable;
P5 normality oil pressure
Oil pressure demand when P_SHM gear shift management
Oil pressure demand when P_SHMD fault diagnosis
K main oil pressure is at the variance ratio of each circulation time
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendments or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although more used the term such as main oil pressure, fast mode herein, do not got rid of the possibility that uses other term.Use these terms to be only used to describe more easily and explain essence of the present invention; They are construed to any additional restriction is all contrary with spirit of the present invention.
Claims (8)
1. the main oil pressure control method of an automatic transmission, regulate the main oil pressure value of speed changer inside for the control module of automatic transmission, it is characterized in that, control module stores oil pressure minimum value, oil pressure maximum value, fault diagnosis oil pressure value and gearshift management oil pressure value, and main oil pressure control comprises the following steps:
Step 1, control module judge automatic transmission current be whether gearshift fault diagnosis state, if so, that is: automatic transmission is in the time of gearshift fault diagnosis state, control module to main oil pressure value, and proceeds to step 4 by fault diagnosis oil pressure value assignment; If not, proceed to step 2;
Step 2, control module judge that automatic transmission is current whether in gearshift controlled state, and if so, that is: automatic transmission is in the time of gearshift controlled state, and control module will be shifted gears management oil pressure value assignment to main oil pressure value, and proceed to step 4; If not, proceed to step 3;
Step 3, control module by normality oil pressure value assignment to main oil pressure value;
Step 4, control module judges whether main oil pressure value is less than oil pressure minimum value, if so, that is: main oil pressure value is less than oil pressure minimum value, again by oil pressure minimum value assignment to main oil pressure value, and proceed to step 1, repeat above-mentioned circulation; If not, main oil pressure value is constant, and proceeds to step 5;
Step 5, control module judges whether main oil pressure value is greater than oil pressure maximum value, if so, that is: main oil pressure value is greater than oil pressure maximum value, again by oil pressure maximum value assignment to main oil pressure value; If not, main oil pressure value is constant, and proceeds to step 1, repeats above-mentioned circulation.
2. the main oil pressure control method of automatic transmission according to claim 1, it is characterized in that, in described step 3, normality oil pressure is definite according to the main oil pressure of the main oil pressure of the main oil pressure of the main oil pressure of current gear demand, heat pattern demand, fast mode demand and AD HOC demand, and described normality oil pressure is the maximum value in above-mentioned four main oil pressures.
3. the main oil pressure control method of automatic transmission according to claim 2, is characterized in that, the main oil pressure of current gear demand is obtained by following linear function:
P
_gear=mτ
Input+P
0
In formula, P
_ gearfor the main oil pressure of current gear demand, τ
inputfor the moment of torsion input of clutch, m is current clutch moment of torque oil pressure coefficient, P
0for the demand oil pressure side-play amount of the corresponding clutch of current gear, for each range state, moment of torsion oil pressure coefficient and side-play amount are calibration value.
4. the main oil pressure control method of automatic transmission according to claim 3, is characterized in that, in the situation of multiple clutches, each clutch calculates the main oil pressure of demand separately, and the maximum value of then getting is wherein the main oil pressure of current gear demand.
5. the main oil pressure control method of automatic transmission according to claim 2, is characterized in that, stores the minimum oil pressure of heat pattern in described control module, and in the time that heat pattern activates, the main oil pressure of setting heat pattern demand is the minimum oil pressure of heat pattern; In the time of heat pattern un-activation, the main oil pressure of setting heat pattern demand is 0.
6. the main oil pressure control method of automatic transmission according to claim 2, it is characterized in that, described control module stores the minimum oil pressure of rated engine speed and high rotating speed, when the main oil pressure of engine speed setting high-speed mode requirement during higher than rated engine speed is the minimum oil pressure of high rotating speed; When engine speed is not during higher than rated engine speed, the main oil pressure of setting high-speed mode requirement is 0.
7. the main oil pressure control method of automatic transmission according to claim 2, it is characterized in that, described control module stores AD HOC oil pressure, when vehicle is in starting, garage gearshift situation lower time, the main oil pressure of setting AD HOC demand is AD HOC oil pressure, and the main oil pressure of other times AD HOC demand is 0.
8. according to the main oil pressure control method of the automatic transmission described in any one in claim 2 to 7, it is characterized in that, the peaked variance ratio of the maximum value in four main oil pressures and a upper circulation is less than 1500bar/s.
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| CN102537314B true CN102537314B (en) | 2014-10-15 |
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| CN104458119B (en) * | 2013-09-12 | 2017-06-13 | 上海汽车集团股份有限公司 | The trouble-shooter and its method of the hydrostatic sensor of hydraulic gearbox |
| CN104728427B (en) * | 2015-03-03 | 2017-04-05 | 盛瑞传动股份有限公司 | A kind of hypotensive guard method of gearbox working connection |
| CN106402376B (en) * | 2016-10-10 | 2018-11-27 | 联合汽车电子有限公司 | The working connection compress control method of automatic gear-box |
| CN107035855B (en) * | 2016-12-20 | 2018-11-06 | 安徽江淮汽车集团股份有限公司 | A kind of wet-type dual-clutch main oil pressure control method and system |
| CN108518478B (en) * | 2018-04-08 | 2019-10-18 | 泰牛汽车技术(苏州)有限公司 | Double-clutch speed changer main oil pressure self-adaptation control method and system |
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| CN111231932B (en) * | 2020-01-17 | 2021-04-16 | 吉利汽车研究院（宁波）有限公司 | Oil pressure balance control device of automobile hybrid power system |
| CN111288043B (en) * | 2020-02-19 | 2022-09-30 | 中国第一汽车股份有限公司 | Clutch execution piston clamping stagnation detection method and device |
| CN111828621B (en) * | 2020-07-22 | 2022-02-08 | 中国第一汽车股份有限公司 | Pressure control method of high-pressure system of automatic transmission |
| CN112032296B (en) * | 2020-08-16 | 2022-08-05 | 浙江轩孚自动变速器有限公司 | Main oil pressure control method for automatic transmission |
| CN112709814A (en) * | 2020-12-31 | 2021-04-27 | 浙江吉利控股集团有限公司 | Transmission oil pressure control method and device and computer storage medium |
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| CN102537314A (en) | 2012-07-04 |
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