CN111350814A - Oil filling time or oil filling pressure calibration method and system of clutch and vehicle - Google Patents
Oil filling time or oil filling pressure calibration method and system of clutch and vehicle Download PDFInfo
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- CN111350814A CN111350814A CN201811581387.9A CN201811581387A CN111350814A CN 111350814 A CN111350814 A CN 111350814A CN 201811581387 A CN201811581387 A CN 201811581387A CN 111350814 A CN111350814 A CN 111350814A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
- F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Control Of Transmission Device (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
The invention provides a method and a system for calibrating oil filling time or oil filling pressure of a clutch and a vehicle, wherein the method comprises the following steps: keeping the oil charging pressure unchanged, and charging oil to the clutch which is not engaged; judging whether the disturbance quantity of the rotating speed of the output shaft of the clutch is smaller than a preset value or not; if not, changing the oil filling time, and filling oil again for the clutch which is not engaged; recording the change amount of the oil filling time until the disturbance amount of the rotation speed of the output shaft of the clutch is less than a preset value; and determining the calibration value of the oil filling time according to the change amount of the oil filling time and the preset compensation amount of the oil filling time. The method can carry out self-learning on the oil charging time or the oil charging pressure of the clutch, thereby being beneficial to accurately correcting the control data of the processing error of the clutch, carrying out learning optimization on the gear shifting quality and further meeting the requirement of a driver on the gear shifting comfort.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a method and a system for calibrating oil filling time or oil filling pressure of a clutch and a vehicle.
Background
With the popularization of automatic transmission vehicles, the requirement of people on driving comfort is higher and higher. The host factory and the transmission manufacturer repeatedly calibrate the gear shifting quality in order to meet the requirements of drivers.
However, due to the processing error of hardware, the coverage capability of software data is poor, so that the problem of different gear shifting qualities of the same control data is caused, and the gear shifting comfort of the vehicle is influenced.
Disclosure of Invention
In view of the above, the present invention is directed to provide a method for calibrating an oil charging time of a clutch, which is capable of performing self-learning on the oil charging time of the clutch, thereby facilitating accurate correction of control data of a clutch machining error, and performing learning optimization on a gear shifting quality, so as to meet a requirement of a driver on gear shifting comfort.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for calibrating oil filling time of a clutch comprises the following steps: keeping the oil charging pressure unchanged, and charging oil to the clutch which is not engaged; judging whether the disturbance quantity of the rotating speed of the output shaft of the clutch is smaller than a preset value or not; if not, changing the oil filling time, and filling oil again for the clutch which is not engaged; recording the change amount of the oil filling time until the disturbance amount of the rotation speed of the output shaft of the clutch is smaller than a preset value; and determining the calibration value of the oil filling time according to the change amount of the oil filling time and the preset compensation amount of the oil filling time.
Further, the changing the oil fill time comprises: gradually increasing the oil filling time and gradually decreasing the oil filling time, wherein the change amount of the oil filling time comprises an increasing amount corresponding to the gradually increasing of the oil filling time and a decreasing amount corresponding to the gradually decreasing of the oil filling time.
Further, still include: judging whether the calibration value of the oil charging time is higher than a preset calibration time upper limit value or is smaller than a preset calibration time lower limit value; if the calibration value of the oil charging time is higher than the upper limit value of the calibration time, taking the upper limit value of the calibration time as the calibration value of the oil charging time; and if the calibration value of the oil charging time is smaller than the lower limit value of the calibration time, taking the lower limit value of the calibration time as the calibration value of the oil charging time.
Compared with the prior art, the oil filling time calibration method of the clutch has the following advantages:
the oil filling time calibration method of the clutch keeps the oil filling pressure unchanged, oil is filled into the clutch which is not jointed, when the disturbance quantity is greater than the preset value, the oil filling time is changed, the oil is filled into the clutch again, until the disturbance quantity is less than the preset value, the corresponding oil filling time change quantity is recorded, the calibration value of the oil filling time is determined according to the oil filling time change quantity and the preset oil filling time compensation quantity, so that the oil filling time of the clutch is calibrated according to the calibration value, the self-learning of the oil filling time of the clutch can be realized, the control data of the processing error of the clutch can be accurately corrected, the gear shifting quality can be learned and optimized, and the requirement of a driver on the gear shifting comfort can be further met.
The second purpose of the invention is to provide a method for calibrating the oil charging pressure of the clutch, which can carry out self-learning of the oil charging pressure of the clutch, thereby being beneficial to accurately correcting the control data of the processing error of the clutch, and carrying out learning optimization on the gear shifting quality, and further meeting the requirement of a driver on the gear shifting comfort.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for calibrating oil filling pressure of a clutch comprises the following steps: keeping the oil filling time unchanged, and filling oil to the clutch which is not engaged; judging whether the disturbance quantity of the rotating speed of the output shaft of the clutch is smaller than a preset value or not; if not, changing the oil filling pressure, and filling oil again for the clutch which is not engaged; recording the change amount of the oil charge pressure until the disturbance amount of the rotation speed of the output shaft of the clutch is smaller than a preset value; and determining the calibration value of the oil filling pressure according to the change quantity of the oil filling pressure and the preset oil filling pressure compensation quantity. :
further, still include: judging whether the calibration value of the oil charging pressure is higher than a preset calibration pressure upper limit value or lower than a preset calibration pressure lower limit value; if the calibration value of the oil charging pressure is higher than the upper limit value of the calibration pressure, taking the upper limit value of the calibration pressure as the calibration value of the oil charging pressure; and if the calibration value of the oil charging pressure is smaller than the lower limit value of the calibration pressure, taking the lower limit value of the calibration pressure as the calibration value of the oil charging pressure.
Compared with the prior art, the method for calibrating the oil charging pressure of the clutch has the following advantages:
the oil filling pressure calibration method of the clutch keeps the oil filling time unchanged, oil is filled into the clutch which is not jointed, when the disturbance quantity is larger than the preset value, the oil filling pressure is changed, the oil is filled into the clutch again, until the disturbance quantity is smaller than the preset value, the corresponding oil filling pressure change quantity is recorded, the calibration value of the oil filling pressure is determined according to the oil filling pressure change quantity and the preset oil filling pressure compensation quantity, so that the oil filling pressure of the clutch is calibrated according to the calibration value, the self-learning of the oil filling pressure of the clutch can be realized, the control data of the processing error of the clutch can be accurately corrected, the gear shifting quality can be learned and optimized, and the requirement of a driver on the gear shifting comfort can be further met.
The third purpose of the invention is to provide an oil filling time calibration system of the clutch, which can carry out self-learning on the oil filling time of the clutch, thereby being beneficial to accurately correcting the control data of the processing error of the clutch, carrying out learning optimization on the gear shifting quality and further meeting the requirement of a driver on the gear shifting comfort.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an oil fill time calibration system for a clutch, comprising: the first control module is used for keeping the oil filling pressure unchanged and filling oil to the unengaged clutch; the first judgment module is used for judging whether the disturbance quantity of the rotating speed of the output shaft of the clutch is smaller than a preset value or not; the second control module is used for changing the oil filling time and filling oil into the clutch which is not engaged again when the disturbance quantity of the rotating speed of the output shaft of the clutch is greater than or equal to a preset value; the first recording module is used for recording the change amount of oil filling time when the disturbance amount of the rotating speed of the output shaft of the clutch is smaller than a preset value; and the first determining module is used for determining the calibration value of the oil filling time according to the change amount of the oil filling time and the preset compensation amount of the oil filling time.
Further, the first determining module is further configured to: judging whether the calibration value of the oil charging time is higher than a preset calibration time upper limit value or is smaller than a preset calibration time lower limit value; when the calibration value of the oil charging time is higher than the upper limit value of the calibration time, taking the upper limit value of the calibration time as the calibration value of the oil charging time; and when the calibration value of the oil charging time is smaller than the lower limit value of the calibration time, taking the lower limit value of the calibration time as the calibration value of the oil charging time.
Compared with the prior art, the oil filling time calibration system of the clutch and the oil filling time calibration method of the clutch have the same advantages, and are not repeated herein.
The fourth purpose of the invention is to provide an oil charging pressure calibration system of the clutch, which can carry out self-learning of oil charging pressure on the clutch, thereby being beneficial to accurately correcting control data of machining errors of the clutch, carrying out learning optimization on gear shifting quality and further meeting the requirement of a driver on gear shifting comfort.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a system for calibrating fill pressure of a clutch, comprising: the third control module is used for keeping the oil filling time unchanged and filling oil to the unengaged clutch; the second judgment module is used for judging whether the disturbance quantity of the rotating speed of the output shaft of the clutch is smaller than a preset value or not; the fourth control module is used for changing oil filling pressure and filling oil into the unengaged clutch again when the disturbance quantity of the rotating speed of the output shaft of the clutch is larger than or equal to a preset value; the second recording module is used for recording the change amount of the oil filling pressure when the disturbance amount of the rotating speed of the output shaft of the clutch is smaller than a preset value; and the second determination module is used for determining the calibration value of the oil filling pressure according to the change quantity of the oil filling pressure and the preset oil filling pressure compensation quantity.
Further, the second determining module is further configured to: judging whether the calibration value of the oil charging pressure is higher than a preset calibration pressure upper limit value or lower than a preset calibration pressure lower limit value; when the calibration value of the oil charging pressure is higher than the upper limit value of the calibration pressure, taking the upper limit value of the calibration pressure as the calibration value of the oil charging pressure; and when the calibration value of the oil charging pressure is smaller than the lower limit value of the calibration pressure, taking the lower limit value of the calibration pressure as the calibration value of the oil charging pressure.
Compared with the prior art, the oil filling pressure calibration system of the clutch and the oil filling pressure calibration method of the clutch have the same advantages, and are not repeated herein.
A fifth object of the present invention is to provide a vehicle, which can perform self-learning of oil charging time or oil charging pressure for a clutch, thereby facilitating accurate correction of control data of clutch machining error, learning and optimizing gear shifting quality, and further satisfying the driver's demand for gear shifting comfort
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle is provided with the oil filling time calibration system of the clutch according to the embodiment or the oil filling pressure calibration system of the clutch according to the embodiment.
Compared with the prior art, the vehicle and the oil filling time calibration system of the clutch or the oil filling pressure calibration system of the clutch have the same advantages, and the detailed description is omitted.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a method for calibrating a fill time of a clutch according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method of clutch fill pressure calibration according to an embodiment of the present invention;
FIG. 3 is a block diagram of a system for calibrating fill time of a clutch according to an embodiment of the present invention;
fig. 4 is a block diagram of a system for calibrating the fill pressure of a clutch according to an embodiment of the present invention.
Description of reference numerals:
the system comprises a clutch oil filling time calibration system 100, a first control module 110, a first judgment module 120, a second control module 130, a first recording module 140, a first determination module 150, a clutch oil filling pressure calibration system 200, a third control module 210, a second judgment module 220, a fourth control module 230, a second recording module 240 and a second determination module 250.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The basic principle of the embodiment of the invention for self-learning of the clutch in the stable gear is described first.
When the vehicle is in a certain gear and is stably driven, the TCU controls the non-working clutch in the transmission to quickly charge oil. For example: and 5 clutches in the transmission are named by A, B, C, D, E respectively, the working clutches are B and E in the 5-gear state, the rest A, C, D clutch is the non-working clutch, and whether the non-working clutch (namely the non-engaged clutch) reaches the just engaging point (kiss point) is judged according to the disturbance quantity of the rotating speed (judged by the rotating speed acceleration of the output shaft of the transmission), so that the processing error of the clutch is calculated, and a proper self-learning value is obtained. If the oil filling time is fixed, the learning value of the oil filling pressure can be obtained; if the oil filling pressure is fixed, the learning value of the oil filling time can be obtained.
That is to say, the precondition for the test of the method for calibrating the oil filling time of the clutch according to the embodiment of the present invention is that the vehicle is in a stable driving condition. The method for judging whether the vehicle is in the stable running working condition comprises the following steps: and judging whether the vehicle is in a stable running working condition or not according to the engine torque, the engine rotating speed and the rotating speed acceleration of the output shaft of the transmission of the vehicle. The method specifically comprises the following steps: and if the engine torque is in a preset torque range, the engine rotating speed is in a preset rotating speed range, and the rotating speed acceleration of the output shaft of the transmission is in a preset acceleration range, judging that the vehicle is in a stable running working condition.
Wherein the preset torque range can be calibrated according to actual requirements, and an exemplary list is shown in table 1.
| Engine torque | Upper limit value of torque | Lower limit value of torque |
| Torque/unit NM | 150 | 80 |
TABLE 1
The preset speed range can be calibrated according to actual requirements, and an exemplary list is shown in table 2.
| Rotational speed of engine | Upper limit value of rotation speed | Lower limit of rotation speed |
| Speed of rotation/unit rpm | 2000 | 1300 |
TABLE 2
The preset acceleration range can be calibrated according to actual requirements, and an exemplary list is shown in table 3.
| Rotational speed acceleration of output shaft | Upper limit value of acceleration | Lower limit of acceleration |
| Acceleration/unit rpm/s | 30 | -30 |
TABLE 3
In this regard, FIG. 1 is a flow chart of a method for calibrating a fill time of a clutch according to one embodiment of the present invention.
As shown in fig. 1, a method for calibrating an oil filling time of a clutch according to an embodiment of the present invention includes the following steps:
step S1: and keeping the oil filling pressure unchanged, and filling oil to the clutch which is not engaged.
Step S2: and judging whether the disturbance quantity of the rotating speed of the output shaft of the clutch is smaller than a preset value or not. Specifically, the preset value is a reasonable value of the disturbance amount, when the disturbance amount is smaller than a preset value, the disturbance amount is reasonable, calibration of the clutch oil filling time is not needed, and when the disturbance amount is larger than or equal to the preset value, the disturbance amount is unreasonable, the calibration of the clutch oil filling time is needed, namely, the clutch self-learning is needed.
Step S3: if not (i.e., the amount of disturbance is greater than or equal to the predetermined value), the fill time is changed and the unengaged clutch is filled again.
Specifically, in one embodiment of the present invention, the process of changing the oil fill time comprises: the oil filling time is gradually increased and the oil filling time is gradually decreased, and the change amount of the oil filling time comprises an increasing amount corresponding to the gradually increased oil filling time and a decreasing amount corresponding to the gradually decreased oil filling time. That is, the amount of change in the oil-filling time is equal to the sum of the amount of increase in the oil-filling time which is gradually increased and the amount of decrease in the oil-filling time which is gradually decreased.
For example, in the oil filling process, if disturbance exists and the disturbance amount is greater than or equal to a preset value, the oil filling time is gradually decreased, and finally no disturbance is ensured through the gradual reduction of the oil filling time. And further, detecting that no disturbance is generated and the continuous times need to reach a first preset time (after detecting that no disturbance is generated, the next oil filling control is delayed by the last oil filling time until a transition condition is met, and if the disturbance is generated at the previous time, the oil filling time is continuously increased according to the current oil filling times at this time). The first predetermined number of times can be calibrated according to actual requirements, and an exemplary list is shown in table 4.
TABLE 4
When detecting whether there is a disturbance, the detection condition with the lowest disturbance amount may be calibrated, for example, as shown in table 5.
TABLE 5
As shown in table 5, that is, in the 1 st gear and the 2 nd gear, no disturbance exists, and in the 3 rd to 6 th gears, it is determined that there is a disturbance according to the absolute value of the rotational speed and the acceleration of the output shaft in each gear, and the disturbance amount is not less than the predetermined value.
Further, the successive decreasing oil filling times may be calibrated, in other words, each decreasing oil filling time may be preset. In the specific embodiment, the following calibration times are not counted in the first oil filling detection, and the calibration parameter is negative, and the decrease amount of the oil filling time is exemplarily listed as shown in table 6.
TABLE 6
As shown in table 6, that is, the reduction amount of each oil filling time is determined according to the current oil filling times, for example, when the current oil filling times is 1, the corresponding reduction amount is-10 ms, when the current oil filling times is 2, the corresponding reduction amount is-8 ms, and when the current oil filling times is 3, the corresponding reduction amount is-6 ms, that is, the reduction amount is gradually decreased, which is not repeated herein.
Furthermore, after the disturbance is eliminated through the gradual decrease of the oil filling time in the process, the rapid oil filling control is further carried out, and the disturbance is ensured to exist finally through the gradual increase of the oil filling time. And further, detecting the disturbance and the continuous times need to reach a second preset time (after the disturbance is detected, the next oil filling control is delayed by the last oil filling time until the transition condition is met, if the disturbance exists at the previous time, the oil filling time is continuously reduced according to the current oil filling times if no disturbance exists at the current time). Wherein the second predetermined number of times can be calibrated according to actual requirements, and an exemplary list is shown in table 7.
TABLE 7
The oil filling time which is gradually increased can be calibrated, in other words, the oil filling time which is increased each time can be preset. In a specific embodiment, the amount of increase in the oil-filling time is exemplified as shown in Table 8.
TABLE 8
As shown in table 8, that is, the increment of each oil filling time is determined according to the current oil filling times, for example, when the current oil filling times is 1, the corresponding increment is 5ms, and when the current oil filling times is 2, the corresponding increment is 5ms, which is not repeated herein.
Step S4: and recording the change amount of the oil filling time until the disturbance amount of the rotation speed of the output shaft of the clutch is smaller than a preset value.
Step S5: and determining the calibration value of the oil filling time according to the change amount of the oil filling time and the preset compensation amount of the oil filling time. Specifically, as previously described, the calibration value of the oil-filling time is equal to the sum of the amount of change in the oil-filling time and the amount of compensation for the oil-filling time, and the amount of change in the oil-filling time is equal to the sum of the amount of increase in the oil-filling time that is gradually increased and the amount of decrease in the oil-filling time that is gradually decreased. The preset oil filling time compensation amount is set to eliminate disturbance existing in self-learning of the clutch, and therefore the preset oil filling time compensation amount is a negative value. In a specific embodiment, the oil filling time compensation amount can be calibrated according to actual requirements, and an exemplary list is shown in table 9.
TABLE 9
Further, in one embodiment of the present invention, the method further comprises: judging whether the calibration value of the oil charging time is higher than a preset upper limit value of the calibration time or is smaller than a preset lower limit value of the calibration time; if the calibration value of the oil charging time is higher than the upper limit value of the calibration time, taking the upper limit value of the calibration time as the calibration value of the oil charging time; if the calibration value of the oil charging time is smaller than the calibration time lower limit value, the calibration time lower limit value is used as the calibration value of the oil charging time, and therefore the accuracy and the reliability of calibration of the oil charging time of the clutch can be improved through comparison of the preset calibration time limit value and the actually calculated calibration value.
In a specific embodiment, the preset calibration time upper limit value and the preset calibration time lower limit value may be calibrated according to actual requirements, and specific examples are shown in table 10.
| Time of oil charge | Upper limit of calibration time | Lower limit of calibration time |
| Unit/ms | 30 | -30 |
Watch 10
As shown in table 10, that is, when the calculated calibration value of the oil-filling time exceeds the preset calibration time upper limit value 30, the calibration time upper limit value 30 is used as the final calibration value of the oil-filling time, or when the calculated calibration value of the oil-filling time is smaller than the preset calibration time lower limit value-30, the calibration time lower limit value-30 is used as the final calibration value of the oil-filling time. Otherwise, namely the calculated calibration value of the oil filling time is less than or equal to the preset calibration time upper limit value 30 and is greater than or equal to the calibration time lower limit value minus 30, the calculated calibration value of the oil filling time is used as the final oil filling time calibration value, and therefore the accuracy and the reliability of the calibration of the oil filling time of the clutch are improved.
Further, in an embodiment of the present invention, before calibrating the clutch fill time, the method further includes: and judging whether a clutch capable of carrying out oil charge time calibration exists under the current gear, namely whether a clutch capable of carrying out self-learning exists under the current gear. This is because there may or may not be a clutch requiring calibration in different gears. For example, as shown in table 11 below, the set clutch numbers are: 0 represents no clutch; 1 represents a clutch A; 2 represents a B clutch; 3 represents a C clutch; 4 represents a D clutch; 5 represents the E clutch).
| Current gear | 1 | 2 | 3 | 4 | 5 | 6 |
| Clutch code | 0 | 0 | 4 | 5 | 3 | 3 |
TABLE 11
As shown in table 11, there is no self-learning clutch in gears 1 and 2, and there is a self-learning clutch in gears 3 to 6, for example, the D clutch can be self-learned in gear 3, the E clutch can be learned in gear 4, and the C clutch can be self-learned in gears 5 and 6. It should be noted that, this is only an exemplary illustration, and the embodiments of the present invention are not limited thereto.
It should be noted that the detection of the disturbance amount is performed at the start of each oil-filling control, and the detection is completed after the completion of the oil-filling and delayed by a preset time, which is, for example, 1 second.
In one embodiment of the invention, the method further comprises: and limiting the calibration times of each clutch capable of self-learning, namely, each clutch corresponds to a time limit value allowing calibration, and when the calibration times exceed the corresponding time limit value, the clutch is not calibrated. For example, as shown in table 12 below, the clutch numbers are set as follows: 1 represents a clutch A; 2 represents a B clutch; 3 represents a C clutch; 4 represents a D clutch; 5 represents the E clutch).
| Clutch code | 1 | 2 | 3 | 4 | 5 |
| Time limit | 10 | 10 | 10 | 10 | 10 |
TABLE 12
As shown in table 12, in this example, the limit of the allowable calibration times of each clutch is 10, that is, the allowable calibration times of each clutch is 10 times, and when the allowable calibration times of each clutch exceed 10 times, the clutch is not calibrated.
In summary, according to the method for calibrating the oil filling time of the clutch provided by the embodiment of the invention, the oil filling pressure is kept unchanged, the clutch which is not engaged is filled with oil, when the disturbance quantity is greater than the preset value, the oil filling time is changed, the clutch is filled with oil again, until the disturbance quantity is smaller than the preset value, the corresponding oil filling time change quantity is recorded, and the calibration value of the oil filling time is determined according to the oil filling time change quantity and the preset oil filling time compensation quantity, so that the oil filling time of the clutch is calibrated according to the calibration value, the self-learning of the oil filling time of the clutch can be realized, the control data of the processing error of the clutch can be accurately corrected, the gear shifting quality can be learned and optimized, and the requirement of a driver on the gear shifting comfort can be further met.
A further embodiment of the present invention provides a method for calibrating an oil fill pressure of a clutch. Namely, the oil charging time is fixed, and the oil charging pressure is learned to obtain the learned value of the oil charging pressure.
The testing precondition of the oil charging pressure calibration method of the clutch provided by the embodiment of the invention is that the vehicle is in a stable running working condition. The method for judging whether the vehicle is in the stable running working condition comprises the following steps: and judging whether the vehicle is in a stable running working condition or not according to the engine torque, the engine rotating speed and the rotating speed acceleration of the output shaft of the transmission of the vehicle. The method specifically comprises the following steps: and if the engine torque is in a preset torque range, the engine rotating speed is in a preset rotating speed range, and the rotating speed acceleration of the output shaft of the transmission is in a preset acceleration range, judging that the vehicle is in a stable running working condition.
Based on this, fig. 2 is a flowchart of a method of calibrating a fill pressure of a clutch according to one embodiment of the invention. As shown in fig. 2, the method comprises the steps of:
step S10: keeping the oil filling time unchanged, and filling oil to the clutch which is not engaged.
Step S20: and judging whether the disturbance quantity of the rotating speed of the output shaft of the clutch is smaller than a preset value or not. Specifically, the preset value is a reasonable value of the disturbance amount, when the disturbance amount is smaller than a preset value, the disturbance amount is reasonable, calibration of the clutch oil filling pressure is not needed, and when the disturbance amount is larger than or equal to the preset value, the disturbance amount is unreasonable, the calibration of the clutch oil filling pressure is needed, namely, the clutch self-learning is needed.
Step S30: if not (i.e., the amount of disturbance is greater than or equal to the predetermined value), the fill pressure is changed and the unengaged clutch is filled again.
Specifically, in one embodiment of the present invention, the process of changing the oil charge pressure comprises: the oil filling pressure is gradually increased and the oil filling pressure is gradually decreased, and the change amount of the oil filling pressure comprises an increase amount corresponding to the gradually increased oil filling pressure and a decrease amount corresponding to the gradually decreased oil filling pressure. That is, the amount of change in the oil-filling pressure is equal to the sum of the amount of increase in the oil-filling pressure gradually increased and the amount of decrease in the oil-filling pressure gradually decreased.
Step S40: and recording the change amount of the oil charge pressure until the disturbance amount of the rotation speed of the output shaft of the clutch is smaller than a preset value.
Step S50: and determining the calibration value of the oil filling pressure according to the change quantity of the oil filling pressure and the preset oil filling pressure compensation quantity. Specifically, as previously described, the calibration value of the oil-filling pressure is equal to the sum of the amount of change in the oil-filling pressure and the amount of compensation of the oil-filling pressure, and the amount of change in the oil-filling pressure is equal to the sum of the amount of increase in the oil-filling pressure that is gradually increased and the amount of decrease in the oil-filling pressure that is gradually decreased. The preset oil charge pressure compensation amount is set to eliminate disturbance existing in self-learning of the clutch, and therefore the preset oil charge pressure compensation amount is a negative value.
Further, in one embodiment of the present invention, the method further comprises: judging whether the calibration value of the oil charging pressure is higher than a preset calibration pressure upper limit value or lower than a preset calibration pressure lower limit value; if the calibration value of the oil charging pressure is higher than the upper limit value of the calibration pressure, taking the upper limit value of the calibration pressure as the calibration value of the oil charging pressure; if the calibration value of the oil charging pressure is smaller than the lower limit value of the calibration pressure, the lower limit value of the calibration pressure is used as the calibration value of the oil charging pressure, and therefore the accuracy and the reliability of calibration of the oil charging pressure of the clutch can be improved through comparison of the preset calibration pressure limit value and the actually calculated calibration value.
In a specific embodiment, the preset upper calibrated pressure limit value and the preset lower calibrated pressure limit value may be calibrated according to actual requirements, for example, as shown in table 13.
| Pressure of oil charge | Calibrating the upper limit of pressure | Calibrating the lower limit of pressure |
| Unit/mbar | 300 | -300 |
Watch 13
As shown in table 13, when the calculated calibration value of the oil filling pressure exceeds the preset calibration pressure upper limit value 300, the calibration pressure upper limit value 300 is used as the final calibration value of the oil filling pressure, or when the calculated calibration value of the oil filling pressure is smaller than the preset calibration pressure lower limit value-300, the calibration pressure lower limit value-300 is used as the final calibration value of the oil filling pressure. Otherwise, namely the calculated calibration value of the oil charging pressure is smaller than or equal to the preset calibration pressure upper limit value 300 and larger than or equal to the calibration pressure lower limit value-300, the calculated calibration value of the oil charging pressure is used as the final oil charging pressure calibration value, and therefore the accuracy and the reliability of the calibration of the oil charging pressure of the clutch are improved.
Further, in an embodiment of the present invention, before calibrating the fill pressure of the clutch, the method further includes: and judging whether a clutch capable of carrying out oil charge pressure calibration exists under the current gear, namely whether a clutch capable of carrying out self-learning exists under the current gear. This is because there may or may not be a clutch requiring calibration in different gears.
It should be noted that the detection of the disturbance amount is performed at the start of each oil-filling control, and the detection is completed after the completion of the oil-filling and delayed by a preset time, which is, for example, 1 second.
In one embodiment of the invention, the method further comprises: and limiting the calibration times of each clutch capable of self-learning, namely, each clutch corresponds to a time limit value allowing calibration, and when the calibration times exceed the corresponding time limit value, the clutch is not calibrated.
It should be noted that, a specific implementation manner of the oil charge pressure calibration method for the clutch according to the embodiment of the present invention is similar to a specific implementation manner of the oil charge time calibration method for the clutch according to the embodiment of the present invention, and reference may be specifically made to the description of the oil charge time calibration method portion, and details are not described here in order to reduce redundancy.
According to the oil filling pressure calibration method of the clutch, the oil filling time is kept unchanged, the clutch which is not jointed is filled with oil, when the disturbance quantity is larger than the preset value, the oil filling pressure is changed, the clutch is filled with oil again until the disturbance quantity is smaller than the preset value, the corresponding oil filling pressure change quantity is recorded, the calibration value of the oil filling pressure is determined according to the oil filling pressure change quantity and the preset oil filling pressure compensation quantity, so that the oil filling pressure of the clutch is calibrated according to the calibration value, the self-learning of the oil filling pressure of the clutch can be realized, the control data of the processing error of the clutch can be accurately corrected, the gear shifting quality can be learned and optimized, and the requirement of a driver on the gear shifting comfort can be further met.
A further embodiment of the present invention provides a system for calibrating an oil fill time of a clutch. Namely, the oil filling pressure is fixed, and the oil filling time is learned to obtain the learning value of the oil filling time.
The testing precondition of the oil filling time calibration system of the clutch provided by the embodiment of the invention is that the vehicle is in a stable running working condition. The method for judging whether the vehicle is in the stable running working condition comprises the following steps: and judging whether the vehicle is in a stable running working condition or not according to the engine torque, the engine rotating speed and the rotating speed acceleration of the output shaft of the transmission of the vehicle. The method specifically comprises the following steps: and if the engine torque is in a preset torque range, the engine rotating speed is in a preset rotating speed range, and the rotating speed acceleration of the output shaft of the transmission is in a preset acceleration range, judging that the vehicle is in a stable running working condition.
Based on this, fig. 3 is a block diagram of a system for calibrating the fill time of a clutch according to an embodiment of the present invention.
As shown in fig. 3, the system 100 for calibrating the fill time of a clutch according to an embodiment of the present invention includes: the recording device comprises a first control module 110, a first judgment module 120, a second control module 130, a first recording module 140 and a first determination module 150.
The first control module 110 is configured to maintain a fill pressure and fill the unengaged clutch.
The first determination module 120 is used to determine whether a disturbance amount of an output shaft speed of the clutch is less than a predetermined value. Specifically, the preset value is a reasonable value of the disturbance amount, when the disturbance amount is smaller than a preset value, the disturbance amount is reasonable, calibration of the clutch oil filling time is not needed, and when the disturbance amount is larger than or equal to the preset value, the disturbance amount is unreasonable, the calibration of the clutch oil filling time is needed, namely, the clutch self-learning is needed.
The second control module 130 is configured to change the fill time and refill the unengaged clutch when the disturbance of the output shaft speed of the clutch is greater than or equal to a predetermined value.
Specifically, in one embodiment of the present invention, the process of changing the oil fill time comprises: the oil filling time is gradually increased and the oil filling time is gradually decreased, and the change amount of the oil filling time comprises an increasing amount corresponding to the gradually increased oil filling time and a decreasing amount corresponding to the gradually decreased oil filling time. That is, the amount of change in the oil-filling time is equal to the sum of the amount of increase in the oil-filling time which is gradually increased and the amount of decrease in the oil-filling time which is gradually decreased.
The first recording module 140 is configured to record an amount of change in the oil charge time when a disturbance amount of a rotation speed of an output shaft of the clutch is less than a predetermined value.
The first determining module 150 is configured to determine a calibration value of the oil filling time according to the change amount of the oil filling time and a preset compensation amount of the oil filling time. Specifically, as previously described, the calibration value of the oil-filling time is equal to the sum of the amount of change in the oil-filling time and the amount of compensation for the oil-filling time, and the amount of change in the oil-filling time is equal to the sum of the amount of increase in the oil-filling time that is gradually increased and the amount of decrease in the oil-filling time that is gradually decreased. The preset oil filling time compensation amount is set to eliminate disturbance existing in self-learning of the clutch, and therefore the preset oil filling time compensation amount is a negative value.
Further, in an embodiment of the present invention, the first determining module 110 is further configured to: judging whether the calibration value of the oil charging time is higher than a preset upper limit value of the calibration time or is smaller than a preset lower limit value of the calibration time; when the calibration value of the oil charging time is higher than the upper limit value of the calibration time, taking the upper limit value of the calibration time as the calibration value of the oil charging time; when the calibration value of the oil charging time is smaller than the calibration time lower limit value, the calibration time lower limit value is used as the calibration value of the oil charging time, and therefore the calibration accuracy and the calibration reliability of the oil charging time of the clutch can be improved through comparison of the preset calibration time limit value and the actually calculated calibration value.
Further, in an embodiment of the present invention, before calibrating the oil filling time of the clutch, the first determining module 120 is further configured to determine whether a clutch capable of performing oil filling time calibration exists in the current gear, that is, whether a clutch capable of performing self-learning exists in the current gear. This is because there may or may not be a clutch requiring calibration in different gears.
It should be noted that the detection of the disturbance amount is performed at the start of each oil-filling control, and the detection is completed after the completion of the oil-filling and delayed by a preset time, which is, for example, 1 second.
In one embodiment of the invention, the system further comprises a first limiting module, which is used for limiting the calibration times of each clutch capable of self-learning, namely, each clutch corresponds to a limit value of the allowable calibration times, and when the calibration times exceed the corresponding limit values, the clutch is not calibrated.
It should be noted that a specific implementation manner of the oil filling time calibration system of the clutch according to the embodiment of the present invention is similar to a specific implementation manner of the oil filling time calibration method of the clutch according to the embodiment of the present invention, and please refer to the description of the method part specifically, and details are not repeated here in order to reduce redundancy.
According to the oil filling time calibration system of the clutch, the oil filling pressure is kept unchanged, the clutch which is not jointed is filled with oil, when the disturbance quantity is larger than the preset value, the oil filling time is changed, the oil is filled into the clutch again, until the disturbance quantity is smaller than the preset value, the corresponding oil filling time change quantity is recorded, the calibration value of the oil filling time is determined according to the oil filling time change quantity and the preset oil filling time compensation quantity, so that the oil filling time of the clutch is calibrated according to the calibration value, the self-learning of the oil filling time of the clutch can be realized, the control data of the processing error of the clutch can be accurately corrected, the gear shifting quality can be learned and optimized, and the requirement of a driver on the gear shifting comfort can be further met.
A further embodiment of the present invention provides a system for calibrating an oil fill pressure of a clutch. Namely, the oil charging time is fixed, and the oil charging pressure is learned to obtain the learned value of the oil charging pressure.
The testing precondition of the oil charging pressure calibration system of the clutch provided by the embodiment of the invention is that the vehicle is in a stable running working condition. The method for judging whether the vehicle is in the stable running working condition comprises the following steps: and judging whether the vehicle is in a stable running working condition or not according to the engine torque, the engine rotating speed and the rotating speed acceleration of the output shaft of the transmission of the vehicle. The method specifically comprises the following steps: and if the engine torque is in a preset torque range, the engine rotating speed is in a preset rotating speed range, and the rotating speed acceleration of the output shaft of the transmission is in a preset acceleration range, judging that the vehicle is in a stable running working condition.
In this regard, FIG. 4 is a block diagram of a fill pressure calibration system for a clutch according to one embodiment of the present invention. As shown in fig. 3, the system 200 for calibrating the fill pressure of the clutch includes: a third control module 210, a second judgment module 220, a fourth control module 230, a second recording module 240, and a second determination module 250.
The third control module 210 is configured to keep the fill time unchanged and fill the unengaged clutch with oil.
The second determination module 220 is used to determine whether the disturbance of the output shaft speed of the clutch is less than a predetermined value. Specifically, the preset value is a reasonable value of the disturbance amount, when the disturbance amount is smaller than a preset value, the disturbance amount is reasonable, calibration of the clutch oil filling pressure is not needed, and when the disturbance amount is larger than or equal to the preset value, the disturbance amount is unreasonable, the calibration of the clutch oil filling pressure is needed, namely, the clutch self-learning is needed.
The fourth control module 230 is configured to vary the fill pressure and refill the unengaged clutch when a disturbance in the rotational speed of the output shaft of the clutch is greater than or equal to a predetermined value.
Specifically, in one embodiment of the present invention, the process of changing the oil charge pressure comprises: the oil filling pressure is gradually increased and the oil filling pressure is gradually decreased, and the change amount of the oil filling pressure comprises an increase amount corresponding to the gradually increased oil filling pressure and a decrease amount corresponding to the gradually decreased oil filling pressure. That is, the amount of change in the oil-filling pressure is equal to the sum of the amount of increase in the oil-filling pressure gradually increased and the amount of decrease in the oil-filling pressure gradually decreased.
The second recording module 240 is configured to record an amount of change in the oil charge pressure when a disturbance amount of an output shaft rotation speed of the clutch is less than a predetermined value.
The second determination module 250 is configured to determine a calibration value of the oil filling pressure according to the change amount of the oil filling pressure and a preset oil filling pressure compensation amount. Specifically, as previously described, the calibration value of the oil-filling pressure is equal to the sum of the amount of change in the oil-filling pressure and the amount of compensation of the oil-filling pressure, and the amount of change in the oil-filling pressure is equal to the sum of the amount of increase in the oil-filling pressure that is gradually increased and the amount of decrease in the oil-filling pressure that is gradually decreased. The preset oil charge pressure compensation amount is set to eliminate disturbance existing in self-learning of the clutch, and therefore the preset oil charge pressure compensation amount is a negative value.
Further, in an embodiment of the present invention, the second determining module 250 is further configured to: judging whether the calibration value of the oil charging pressure is higher than a preset calibration pressure upper limit value or lower than a preset calibration pressure lower limit value; when the calibration value of the oil charging pressure is higher than the upper limit value of the calibration pressure, taking the upper limit value of the calibration pressure as the calibration value of the oil charging pressure; when the calibration value of the oil charging pressure is smaller than the lower limit value of the calibration pressure, the lower limit value of the calibration pressure is used as the calibration value of the oil charging pressure, so that the accuracy and the reliability of calibration of the oil charging pressure of the clutch can be improved by comparing the preset calibration pressure limit value with the actually calculated calibration value.
Further, in an embodiment of the present invention, before calibrating the clutch fill pressure, the second determination module 220 is further configured to: and judging whether a clutch capable of carrying out oil charge pressure calibration exists under the current gear, namely whether a clutch capable of carrying out self-learning exists under the current gear. This is because there may or may not be a clutch requiring calibration in different gears.
It should be noted that the detection of the disturbance amount is performed at the start of each oil-filling control, and the detection is completed after the completion of the oil-filling and delayed by a preset time, which is, for example, 1 second.
In one embodiment of the invention, the system further comprises a second limiting module, which is used for limiting the calibration times of each clutch capable of self-learning, namely, each clutch corresponds to a limit value of the allowable calibration times, and when the calibration times exceed the corresponding limit values, the clutch is not calibrated.
It should be noted that a specific implementation manner of the oil charge pressure calibration system of the clutch according to the embodiment of the present invention is similar to a specific implementation manner of the oil charge pressure calibration method of the clutch according to the embodiment of the present invention, and reference may be made to the description of the method portion specifically, and details are not described here in order to reduce redundancy.
According to the oil filling pressure calibration system of the clutch, the oil filling time is kept unchanged, the clutch which is not jointed is filled with oil, when the disturbance quantity is larger than the preset value, the oil filling pressure is changed, the clutch is filled with oil again until the disturbance quantity is smaller than the preset value, the corresponding oil filling pressure change quantity is recorded, the calibration value of the oil filling pressure is determined according to the oil filling pressure change quantity and the preset oil filling pressure compensation quantity, so that the oil filling pressure of the clutch is calibrated according to the calibration value, the self-learning of the oil filling pressure of the clutch can be realized, the control data of the processing error of the clutch can be accurately corrected, the gear shifting quality can be learned and optimized, and the requirement of a driver on the gear shifting comfort can be further met.
Further, an embodiment of the present invention discloses a vehicle provided with the oil charge time calibration system of the clutch as described in any one of the above embodiments of the present invention, or the oil charge pressure calibration system of the clutch as described in any one of the above embodiments of the present invention. The vehicle can carry out self-learning on oil charging time or oil charging pressure of the clutch, thereby being beneficial to accurately correcting control data of machining errors of the clutch, carrying out learning optimization on gear shifting quality and further meeting the requirement of a driver on gear shifting comfort.
In addition, other configurations and functions of the vehicle according to the embodiment of the present invention are known to those skilled in the art, and are not described herein in detail in order to reduce redundancy.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The method for calibrating the oil filling time of the clutch is characterized by comprising the following steps of:
keeping the oil charging pressure unchanged, and charging oil to the clutch which is not engaged;
judging whether the disturbance quantity of the rotating speed of the output shaft of the clutch is smaller than a preset value or not;
if not, changing the oil filling time, and filling oil again for the clutch which is not engaged;
recording the change amount of the oil filling time until the disturbance amount of the rotation speed of the output shaft of the clutch is smaller than a preset value;
and determining the calibration value of the oil filling time according to the change amount of the oil filling time and the preset compensation amount of the oil filling time.
2. The method for calibrating the oil filling time of the clutch according to claim 1, wherein the step of changing the oil filling time comprises the steps of:
gradually increasing the oil filling time and gradually decreasing the oil filling time, wherein the change amount of the oil filling time comprises an increasing amount corresponding to the gradually increasing of the oil filling time and a decreasing amount corresponding to the gradually decreasing of the oil filling time.
3. The method for calibrating the oil filling time of the clutch according to claim 2, further comprising:
judging whether the calibration value of the oil charging time is higher than a preset calibration time upper limit value or is smaller than a preset calibration time lower limit value;
if the calibration value of the oil charging time is higher than the upper limit value of the calibration time, taking the upper limit value of the calibration time as the calibration value of the oil charging time;
and if the calibration value of the oil charging time is smaller than the lower limit value of the calibration time, taking the lower limit value of the calibration time as the calibration value of the oil charging time.
4. A method for calibrating oil filling pressure of a clutch is characterized by comprising the following steps:
keeping the oil filling time unchanged, and filling oil to the clutch which is not engaged;
judging whether the disturbance quantity of the rotating speed of the output shaft of the clutch is smaller than a preset value or not;
if not, changing the oil filling pressure, and filling oil again for the clutch which is not engaged;
recording the change amount of the oil charge pressure until the disturbance amount of the rotation speed of the output shaft of the clutch is smaller than a preset value;
and determining the calibration value of the oil filling pressure according to the change quantity of the oil filling pressure and the preset oil filling pressure compensation quantity.
5. The method for calibrating the fill pressure of a clutch according to claim 4, further comprising:
judging whether the calibration value of the oil charging pressure is higher than a preset calibration pressure upper limit value or lower than a preset calibration pressure lower limit value;
if the calibration value of the oil charging pressure is higher than the upper limit value of the calibration pressure, taking the upper limit value of the calibration pressure as the calibration value of the oil charging pressure;
and if the calibration value of the oil charging pressure is smaller than the lower limit value of the calibration pressure, taking the lower limit value of the calibration pressure as the calibration value of the oil charging pressure.
6. An oil charge time calibration system for a clutch, comprising:
the first control module is used for keeping the oil filling pressure unchanged and filling oil to the unengaged clutch;
the first judgment module is used for judging whether the disturbance quantity of the rotating speed of the output shaft of the clutch is smaller than a preset value or not;
the second control module is used for changing the oil filling time and filling oil into the clutch which is not engaged again when the disturbance quantity of the rotating speed of the output shaft of the clutch is greater than or equal to a preset value;
the first recording module is used for recording the change amount of oil filling time when the disturbance amount of the rotating speed of the output shaft of the clutch is smaller than a preset value;
and the first determining module is used for determining the calibration value of the oil filling time according to the change amount of the oil filling time and the preset compensation amount of the oil filling time.
7. The system for calibrating fill time of a clutch according to claim 6, wherein the first determining module is further configured to:
judging whether the calibration value of the oil charging time is higher than a preset calibration time upper limit value or is smaller than a preset calibration time lower limit value;
when the calibration value of the oil charging time is higher than the upper limit value of the calibration time, taking the upper limit value of the calibration time as the calibration value of the oil charging time;
and when the calibration value of the oil charging time is smaller than the lower limit value of the calibration time, taking the lower limit value of the calibration time as the calibration value of the oil charging time.
8. An oil charge pressure calibration system for a clutch, comprising:
the third control module is used for keeping the oil filling time unchanged and filling oil to the unengaged clutch;
the second judgment module is used for judging whether the disturbance quantity of the rotating speed of the output shaft of the clutch is smaller than a preset value or not;
the fourth control module is used for changing oil filling pressure and filling oil into the unengaged clutch again when the disturbance quantity of the rotating speed of the output shaft of the clutch is larger than or equal to a preset value;
the second recording module is used for recording the change amount of the oil filling pressure when the disturbance amount of the rotating speed of the output shaft of the clutch is smaller than a preset value;
and the second determination module is used for determining the calibration value of the oil filling pressure according to the change quantity of the oil filling pressure and the preset oil filling pressure compensation quantity.
9. The system for calibrating fill pressure of a clutch of claim 8, wherein the second determination module is further configured to:
judging whether the calibration value of the oil charging pressure is higher than a preset calibration pressure upper limit value or lower than a preset calibration pressure lower limit value;
when the calibration value of the oil charging pressure is higher than the upper limit value of the calibration pressure, taking the upper limit value of the calibration pressure as the calibration value of the oil charging pressure;
and when the calibration value of the oil charging pressure is smaller than the lower limit value of the calibration pressure, taking the lower limit value of the calibration pressure as the calibration value of the oil charging pressure.
10. A vehicle, characterized in that an oil filling time calibration system of a clutch according to any of claims 6-7 or an oil filling pressure calibration system of a clutch according to any of claims 8-9 is provided.
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| CN112413110A (en) * | 2019-12-30 | 2021-02-26 | 盛瑞传动股份有限公司 | Control method for oil filling time of automatic transmission in quick oil filling stage |
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