CN110307266B - Oil filling control method and device for clutch - Google Patents
Oil filling control method and device for clutch Download PDFInfo
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- CN110307266B CN110307266B CN201910688598.0A CN201910688598A CN110307266B CN 110307266 B CN110307266 B CN 110307266B CN 201910688598 A CN201910688598 A CN 201910688598A CN 110307266 B CN110307266 B CN 110307266B
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
- F16D48/066—Control of fluid pressure, e.g. using an accumulator
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H59/24—Inputs being a function of torque or torque demand dependent on the throttle opening
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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
- F16H61/02—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 characterised by the signals used
- F16H61/0202—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 characterised by the signals used the signals being electric
- F16H61/0204—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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Control Of Transmission Device (AREA)
Abstract
The embodiment of the invention provides a clutch oil charge control method and device, and relates to the field of vehicle control. The clutch oil filling control method comprises the following steps: judging whether the state parameters of the automatic transmission before gear shifting meet preset conditions or not; wherein the state parameters comprise an automatic transmission oil temperature parameter and an output shaft acceleration parameter; if the state parameters of the automatic transmission before gear shifting meet preset conditions, determining input shaft acceleration data during gear shifting; a fill height of the clutch is determined based on the input shaft acceleration data. Compared with the existing mode of directly monitoring by adopting a pressure sensor, the method reduces the manufacturing cost of the automatic transmission, can reduce the shifting impact of overlarge oil pressure on the transmission, and improves the comfort of a vehicle.
Description
Technical Field
The invention relates to the field of vehicle control, in particular to a clutch oil charge control method and device.
Background
With the rapid development of automatic transmissions, the loading of automatic transmissions is also rapidly increasing, and the shift comfort of automobiles equipped with automatic transmissions is increasingly demanded by customers. The automatic transmission is a complex structure consisting of hundreds of components, a series of problems are inevitably generated in the manufacturing and assembling processes of the hundreds of components, and particularly the problem of oil filling control of a gear shifting actuating mechanism such as a wet multi-plate clutch is highlighted.
The oil filling control of the clutch requires that oil is quickly and stably filled in a clutch cavity within a specified time, so that not only is no impact generated, but also the follow-up performance of the torque transmitted by the clutch to control pressure is ensured.
At present, in the prior art, the control requirement of product stability is met by adding a pressure sensor on an automatic transmission to realize oil filling control of a clutch, and the control requirement has the following problems: the manufacturing cost of the automatic transmission is increased by relying on the added pressure sensor.
Disclosure of Invention
Objects of the present invention include, for example, providing a clutch fill control method and apparatus that can reduce the manufacturing cost of an automatic transmission.
Embodiments of the invention may be implemented as follows:
in a first aspect, an embodiment of the present invention provides a clutch oil charge control method, including:
judging whether the state parameters of the automatic transmission before gear shifting meet preset conditions or not; wherein the state parameters include an automatic transmission oil temperature parameter and an output shaft acceleration parameter;
if the state parameters of the automatic transmission before gear shifting meet preset conditions, determining input shaft acceleration data during gear shifting;
a fill height of the clutch is determined based on the input shaft acceleration data.
In an alternative embodiment, the determining whether the state parameter of the automatic transmission before shifting meets a preset condition includes:
judging whether the acceleration fluctuation of an output shaft before gear shifting is smaller than a preset acceleration threshold value and judging whether the temperature of the automatic transmission oil is within a preset temperature range;
and under the condition that the acceleration fluctuation of the output shaft is smaller than a preset acceleration threshold value before gear shifting and the oil temperature of the automatic transmission is within a preset temperature range, judging that the state parameters of the automatic transmission before gear shifting meet preset conditions.
In an alternative embodiment, the determining input shaft acceleration data during a shift includes:
acquiring input shaft rotating speed information during gear shifting;
input shaft acceleration data during the shift is determined based on the input shaft speed information.
In an alternative embodiment, said determining input shaft acceleration data during a gear shift based on said input shaft speed information comprises:
obtaining input shaft acceleration information based on the input shaft rotation speed information;
generating an input shaft acceleration curve based on the input shaft acceleration information;
input shaft acceleration data during a shift is determined based on the input shaft acceleration profile.
In an alternative embodiment, said determining a clutch fill level based on said input shaft acceleration data comprises:
performing oil pressure filling judgment on the input shaft acceleration data according to a preset oil filling judgment rule to generate judgment information;
and when the judgment information indicates that the oil pressure is excessively filled, determining the oil filling height of the clutch according to a preset height difference value.
In an optional embodiment, the input shaft acceleration data includes an input rotation speed acceleration average value of a first time calibration interval, an acceleration variation of the first time calibration interval, an input rotation speed acceleration minimum value of a second time calibration interval, a time corresponding to the input rotation speed acceleration minimum value, an acceleration variation of the second time calibration interval, and an input rotation speed acceleration average value of a third time calibration interval.
In an optional embodiment, the preset oil filling judgment rule is as follows:
judging whether the accelerator variable meets a specified condition or not;
if so, determining a fitting input rotation speed acceleration function based on the average value of the input rotation speed acceleration in the first time calibration interval and the average value of the input rotation speed acceleration in the third time calibration interval;
determining a fitted input rotational speed acceleration value of the second time calibration interval at a moment corresponding to the input rotational speed acceleration minimum value of the second time calibration interval based on the fitted input rotational speed acceleration function;
after the fitted input rotating speed acceleration value is determined, the following condition judgment is sequentially carried out, and if the fitted input rotating speed acceleration value is met, the clutch is judged to be excessively filled with oil pressure;
judging whether the acceleration variation of the first time calibration interval is smaller than a first preset threshold value or not;
judging whether the acceleration variation of the first time calibration interval and the acceleration variation of the second time calibration interval meet a first preset proportion condition or not;
and judging whether the difference value between the fitted input rotating speed acceleration value of the second time calibration interval and the minimum value of the input rotating speed acceleration of the second time calibration interval is greater than a second preset threshold value or not.
In a second aspect, an embodiment of the present invention provides a clutch oil charge control apparatus, including:
the automatic transmission control device comprises a first determination module, a second determination module and a control module, wherein the first determination module is used for judging whether the state parameters of the automatic transmission before gear shifting meet preset conditions or not; wherein the state parameters include an automatic transmission oil temperature parameter and an output shaft acceleration parameter; if the state parameters of the automatic transmission before gear shifting meet preset conditions, determining input shaft acceleration data during gear shifting;
a second determination module to determine a fill height of the clutch based on the input shaft acceleration data.
In a third aspect, an embodiment of the present invention provides an electronic device, including: a processor, a memory and a bus, wherein the memory stores machine readable instructions executable by the processor, the processor and the memory communicate via the bus when the electronic device is running, and the machine readable instructions when executed by the processor perform the steps of the clutch oil filling control method according to any one of the preceding embodiments.
In a fourth aspect, embodiments of the present invention provide a computer readable medium having non-volatile program code executable by a processor, the program code causing the processor to perform the steps of the clutch fill control method of any of the preceding embodiments.
The embodiment of the invention has the beneficial effects that:
the embodiment of the invention provides a clutch oil filling control method, a clutch oil filling control device, electronic equipment and a computer readable medium, wherein the method comprises the following steps: judging whether the state parameters of the automatic transmission before gear shifting meet preset conditions or not; wherein the state parameters comprise an automatic transmission oil temperature parameter and an output shaft acceleration parameter; if the state parameters of the automatic transmission before gear shifting meet preset conditions, determining input shaft acceleration data during gear shifting; a fill height of the clutch is determined based on the input shaft acceleration data. Therefore, according to the technical scheme provided by the embodiment of the invention, on the premise that the state parameter before the automatic transmission is shifted meets the preset condition by judging whether the state parameter before the automatic transmission is shifted meets the preset condition, the input shaft acceleration data of the automatic transmission during the shifting period is determined, and finally the oil filling height of the clutch is determined according to the input shaft acceleration data.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a flow chart of a clutch fill control method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of determination information in a clutch fill control method according to an embodiment of the present invention;
FIG. 3 is a flowchart of a method for determining excessive clutch fill in accordance with an embodiment of the present invention;
fig. 4 is a block diagram of a clutch oil charge control device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," "third," and the like, if any, are only used to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1, the present embodiment provides a clutch oil filling control method, including the following steps:
step S101, judging whether the state parameters of the automatic transmission before gear shifting meet preset conditions or not; wherein the state parameters comprise an automatic transmission oil temperature parameter and an output shaft acceleration parameter;
specifically, whether the state parameter of the preset time period before the automatic transmission shifts meets the preset condition is judged.
It should be noted that the above mentioned output shaft acceleration may be directly obtained by the output shaft acceleration sensor, or may be obtained by converting the rotation speed measured by the output shaft rotation speed sensor.
Step S102, if the state parameters of the automatic transmission before gear shifting meet preset conditions, determining input shaft acceleration data during gear shifting;
when determining the input shaft acceleration data during gear shifting, the data can be obtained directly through an acceleration sensor arranged on the input shaft of the transmission, or can be obtained indirectly through the conversion of the rotating speed measured by a rotating speed sensor arranged on the input shaft of the transmission.
Step S103, determining the oil filling height of the clutch based on the input shaft acceleration data.
According to the clutch oil charge control method provided by the embodiment, the working principle of the clutch oil charge control method is as follows: firstly, judging whether state parameters of the automatic transmission before gear shifting meet preset conditions, wherein the state parameters comprise an automatic transmission oil temperature parameter and an output shaft acceleration parameter; and if the state parameters of the automatic transmission before gear shifting meet preset conditions, determining input shaft acceleration data during gear shifting, and finally determining the oil filling height of the clutch according to the input shaft acceleration data to realize oil filling control of the clutch.
The clutch oil filling control method provided by the embodiment at least has the following advantages:
the method realizes oil filling control on the clutch by utilizing the acceleration signal acquired by the original acceleration sensor on the basis of not adding a pressure signal acquired by a pressure sensor, can reduce the production cost of the automatic transmission due to the elimination of an additional pressure sensor part, is beneficial to reducing the gear shifting impact of excessive oil filling on the transmission, and improves the comfort of the automobile.
Optionally, the step S101 may be executed by:
and judging whether the acceleration fluctuation of the output shaft before gear shifting is smaller than a preset acceleration threshold value and judging whether the temperature of the automatic transmission oil is within a preset temperature range.
And under the condition that the acceleration fluctuation of the output shaft is smaller than a preset acceleration threshold value before gear shifting and the oil temperature of the automatic transmission is within a preset temperature range, judging that the state parameters of the automatic transmission before gear shifting meet preset conditions.
It can be seen that this step S101 includes two steps: a, judging whether the acceleration fluctuation of an output shaft before gear shifting is smaller than a preset acceleration threshold value; and b, judging whether the temperature of the automatic transmission oil is in a preset temperature range. The fluctuation of the acceleration of the output shaft refers to the change degree of the acceleration of the output shaft, and can be represented by the change quantity of the maximum value of the acceleration of the output shaft and the minimum value of the acceleration of the output shaft in the current preset time period; the preset acceleration threshold and the preset temperature range can be set according to actual conditions; in this embodiment, the preset acceleration threshold may be set to 1.3m/s2(ii) a The preset temperature range may be set to 50-130 deg.c.
During specific execution, the judgment a can be executed firstly, and then the judgment b is executed on the premise that the judgment a is met; of course, the judgment b may be executed first, and the judgment a may be executed again when the judgment b satisfies the condition, that is, the execution order of the two may be changed.
In this embodiment, it is preferable to perform the oil temperature determination of step b first, and then perform the output shaft acceleration fluctuation determination of step a when the oil temperature satisfies the condition; and the waste of computing resources is avoided.
When both the conditions a and b are satisfied, executing a step of determining input shaft acceleration data during shifting; otherwise, ending the operation.
Optionally, in this embodiment, the step S102 is implemented by indirectly acquiring the input shaft acceleration through the input shaft rotation speed, and specifically, the step S102 of determining the input shaft acceleration data during the gear shifting includes the following sub-steps:
1. acquiring input shaft rotating speed information during gear shifting;
specifically, the method comprises the steps of acquiring input shaft rotating speed information of a gear shifting device through a rotating speed sensor of an input shaft; fig. 2 schematically shows an input shaft speed curve generated from the acquired input shaft speed information, and a solid line in the input shaft speed curve indicates an actual value, and it should be noted that fig. 2 also correspondingly shows a theoretical value (indicated by a dotted line in the figure) of the input shaft speed curve.
2. Input shaft acceleration data during the shift is determined based on the input shaft speed information.
Specifically, the step 2 includes:
2.1 obtaining input shaft acceleration information based on the input shaft rotating speed information;
the input shaft acceleration information described above records the input shaft acceleration values at different times during the gear shift. Here, the input shaft rotational speed information is converted into input shaft acceleration information.
2.2 generating an input shaft acceleration curve based on the input shaft acceleration information;
and generating an input shaft acceleration curve according to the input shaft acceleration information, wherein the abscissa of the curve is time, and the ordinate of the curve is an input shaft acceleration value. With particular reference to fig. 2.
2.3 determining input shaft acceleration data during the shift based on the input shaft acceleration profile.
And determining a plurality of time calibration intervals according to the input shaft acceleration curve and the fluctuation degree of the input shaft acceleration, and determining the input shaft acceleration data during gear shifting in the plurality of time calibration intervals.
Specifically, as shown in fig. 2, the input shaft acceleration data includes a first time scale interval T1Average value a of input rotational speed and accelerationAve1First time calibration interval T1Acceleration variation Δ a of1A second time calibration interval T2Minimum value a of input rotational speed and accelerationmin2And the minimum value a of the input rotating speed and the accelerationmin2Corresponding time t2A second time calibration interval T2Acceleration variation Δ a of2And a third time stampFixed interval T3Average value a of input rotational speed and accelerationAve3。
Optionally, the step S103 is mainly executed by:
(1) performing oil pressure filling judgment on the input shaft acceleration data according to a preset oil filling judgment rule to generate judgment information;
the preset oil filling judgment rule is as follows:
a, judging whether an accelerator variable meets a specified condition or not;
the accelerator variable may be represented by an accelerator opening, specifically, whether the accelerator opening is greater than a preset opening threshold is determined, and the preset opening threshold may be set to 5%.
If yes, determining a fitting input rotation speed acceleration function based on the input rotation speed acceleration average value of the first time calibration interval and the input rotation speed acceleration average value of the third time calibration interval;
specifically, if the throttle opening is larger than 5%, the interval T is calibrated according to the first time1Average value a of input rotational speed and accelerationAve1A third time calibration interval T3Average value a of input rotational speed and accelerationAve3(two points) a fitted input speed and acceleration function y is determined as kx + b (a straight line), y represents acceleration, x represents time, k represents slope, and b represents acceleration constant.
Determining a fitted input rotating speed acceleration value of a second time calibration interval at the moment corresponding to the input rotating speed acceleration minimum value of the second time calibration interval based on the fitted input rotating speed acceleration function;
from the determined fitted input rotational speed and acceleration function y ═ kx + b, the time interval T between the first time division and the second time division can be determined2Minimum value a of input rotational speed and accelerationmin2Corresponding time t2Acceleration point a corresponding to the lower straight liney(i.e., the fitted input tach acceleration value for the second time calibration interval).
D, after the fitted input rotating speed acceleration value is determined, sequentially executing the following D1-D3 condition judgment, and if D1-D3 are all met, judging that the clutch is excessively filled with oil pressure; otherwise, it is judged that the clutch fill is not excessive.
D1, judging whether the acceleration variation of the first time calibration interval is smaller than a first preset threshold value;
in particular, the first predetermined threshold value may be a pre-selected calibration value, here in Δ aThr1Showing and judging the first time calibration interval T1Acceleration variation Δ a of1Whether or not it is less than the first preset threshold value delta aThr1I.e. Δ a1<ΔaThr1。
D2, judging whether the acceleration variation of the first time calibration interval and the acceleration variation of the second time calibration interval meet a first preset proportion condition;
namely, determining Δ a2≥kThr·Δa1(ii) a In the formula kThrIs a proportionality coefficient, generally taking a value of 1-5.
D3, judging whether the difference value between the fitted input rotating speed acceleration value of the second time calibration interval and the input rotating speed acceleration minimum value of the second time calibration interval is larger than a second preset threshold value.
Specifically, the determination of Δ aCAL2＝ay-amin2>ΔaThr2(ii) a Wherein Δ aCAL2Representing the difference value of the fitted input rotating speed acceleration value of a second time calibration interval and the input rotating speed acceleration minimum value of the second time calibration interval; Δ aThr2Representing a second preset threshold value.
(2) And when the judgment information indicates that the oil pressure is excessively filled, determining the oil filling height of the clutch according to a preset height difference value.
That is, when the preset judgment conditions are all satisfied, the generated judgment information indicates that the oil pressure is over-filled, and at this time, the reduction of the clutch oil filling height P is executedFP(as shown in fig. 2), specifically, the oil filling height of the clutch is reduced according to the preset height difference, so that the oil filling height of the clutch is determined.
As shown in fig. 3, the present embodiment also provides a clutch overfill determination method, which includes fill learning condition determination, acceleration information record calculation, and oil overfill determination:
the filling learning condition determination includes: detecting the temperature of Automatic Transmission Fluid (ATF), namely judging whether the ATF temperature is in a range;
and determining whether the fluctuation of the output shaft acceleration before shifting is within a prescribed range.
The above-described fill-learning condition determination is mainly a prerequisite for determining whether or not fill-learning of the current state of the automatic transmission is satisfied.
After the preconditions are satisfied, the following acceleration information recording calculation is performed.
The acceleration information recording calculation comprises the following steps: calculating T1Average value a of input rotating speed and acceleration in time periodAve1And the acceleration variation Δ a in the time period1，T3Average value a of input rotating speed and acceleration in time periodAve3，T2Average value a of input rotating speed and acceleration in time periodmin2And the corresponding time t2And the acceleration change amount deltaa in the period2Reference may be made to fig. 2.
Wherein, the time period T1、T2、T3The real vehicle calibration value can be selected according to whether the acceleration fluctuation of the output shaft is obviously divided.
The acceleration information recording calculation is used for calculating the values related to the acceleration of the input shaft in different time periods, and the calculated values are used for judging the following oil pressure overfilling.
The determination of the excessive oil pressure filling includes the following substeps:
step 1: judging whether an accelerator variable (such as an accelerator opening) is in a specified range under the current driving condition;
step 2: based on recorded data aAve1、aAve3Fitting a straight line y-kx + b (i.e. determining a straight line from two points) and finding t2Acceleration point a corresponding to the straight line at the momenty；
And step 3: according to a threshold value deltaaThr1(calibration value) judgment T1Input rotational speed acceleration change amount delta a in time period1Whether the condition is satisfied: Δ a1<ΔaThr1；
Step 4, judging T2Input rotational speed acceleration change amount delta a in time period2Whether or not the inequality Δ a is satisfied2≥kThr·Δa1(ii) a Coefficient of proportionality kThrThe value is a calibration value, and is generally 1-5;
step 5, judging t2Acceleration change amount Δ a at timeCAL2Whether or not the threshold value Deltaa is satisfiedThr2(calibration value) requirements: Δ aCAL2＝ay-amin2>ΔaThr2；
And if the step 1, the step 3, the step 4 and the step 5 all meet the set conditions, judging that the clutch oil pressure is excessively filled in the current state, and executing the related operation of reducing the oil filling height.
Compared with the mode of directly monitoring by adopting a pressure sensor, the method for judging whether the clutch is excessively filled with oil provided by the embodiment of the invention can effectively reduce the manufacturing cost of the automatic transmission, reduce the shifting impact of the oil pressure excessive filling on the automatic transmission and improve the comfort in the shifting process of the automatic transmission. The method indirectly identifies the oil filling effect of the clutch through speed signals (rotating speed, acceleration and the like) of the input shaft and the output shaft of the automatic transmission, and learns and adjusts the oil filling parameters, so that the control effect is more effective.
As shown in fig. 4, the present embodiment further provides a clutch oil charge control device, including:
the first determination module 400 is used for judging whether the state parameters of the automatic transmission before gear shifting meet preset conditions; wherein the state parameters include an automatic transmission oil temperature parameter and an output shaft acceleration parameter; if the state parameters of the automatic transmission before gear shifting meet preset conditions, determining input shaft acceleration data during gear shifting;
a second determination module 500 determines a fill level of the clutch based on the input shaft acceleration data.
Optionally, the first determining module 400 is configured to determine whether the fluctuation of the output shaft acceleration before shifting is smaller than a preset acceleration threshold and determine whether the temperature of the automatic transmission oil is within a preset temperature range; and under the condition that the acceleration fluctuation of the output shaft is smaller than a preset acceleration threshold value before gear shifting and the oil temperature of the automatic transmission is within a preset temperature range, judging that the state parameters of the automatic transmission before gear shifting meet preset conditions.
Optionally, the first determining module 400 is configured to obtain information about the input shaft speed during the gear shift; input shaft acceleration data during the shift is determined based on the input shaft speed information.
Optionally, the first determining module 400 is configured to obtain input shaft acceleration information based on the input shaft rotation speed information; generating an input shaft acceleration curve based on the input shaft acceleration information; input shaft acceleration data during a shift is determined based on the input shaft acceleration profile.
Optionally, the second determining module 500 is configured to perform oil pressure filling judgment on the input shaft acceleration data according to a preset oil filling judgment rule, and generate judgment information; and when the judgment information indicates that the oil pressure is excessively filled, determining the oil filling height of the clutch according to a preset height difference value.
Specifically, the input shaft acceleration data includes an input rotation speed acceleration average value in a first time calibration interval, an acceleration variation in the first time calibration interval, an input rotation speed acceleration minimum value in a second time calibration interval, a time corresponding to the input rotation speed acceleration minimum value, an acceleration variation in the second time calibration interval, and an input rotation speed acceleration average value in a third time calibration interval.
Further, the preset oil filling judgment rule is as follows: judging whether the accelerator variable meets a specified condition or not; if so, determining a fitting input rotation speed acceleration function based on the average value of the input rotation speed acceleration in the first time calibration interval and the average value of the input rotation speed acceleration in the third time calibration interval; determining a fitted input rotational speed acceleration value of the second time calibration interval at a moment corresponding to the input rotational speed acceleration minimum value of the second time calibration interval based on the fitted input rotational speed acceleration function; after the fitted input rotating speed acceleration value is determined, the following condition judgment is sequentially carried out, and if the fitted input rotating speed acceleration value is met, the clutch is judged to be excessively filled with oil pressure; judging whether the acceleration variation of the first time calibration interval is smaller than a first preset threshold value or not; judging whether the acceleration variation of the first time calibration interval and the acceleration variation of the second time calibration interval meet a first preset proportion condition or not; and judging whether the difference value between the fitted input rotating speed acceleration value of the second time calibration interval and the minimum value of the input rotating speed acceleration of the second time calibration interval is greater than a second preset threshold value or not.
Fig. 5 is a schematic structural diagram of an electronic device 600 provided in an embodiment of the present application, including: a processor 601, a memory 602, and a bus 603;
the memory 602 stores machine-readable instructions (for example, including execution instructions corresponding to the first determining module 400 and the second determining module 500 in fig. 4) executable by the processor 601, when the electronic device 600 runs, the processor 601 communicates with the memory 602 through the bus 603, and the machine-readable instructions, when executed by the processor 601, perform the following processes:
judging whether the state parameters of the automatic transmission before gear shifting meet preset conditions or not; wherein the state parameters comprise an automatic transmission oil temperature parameter and an output shaft acceleration parameter;
if the state parameters of the automatic transmission before gear shifting meet preset conditions, determining input shaft acceleration data during gear shifting;
a fill height of the clutch is determined based on the input shaft acceleration data.
Further, in the operation processed by the processor 601, the input shaft acceleration data includes an input rotation speed acceleration average value in a first time calibration interval, an acceleration variation in the first time calibration interval, an input rotation speed acceleration minimum value in a second time calibration interval, a time corresponding to the input rotation speed acceleration minimum value, an acceleration variation in the second time calibration interval, and an input rotation speed acceleration average value in a third time calibration interval.
The present embodiments also provide a computer readable medium having non-volatile program code executable by a processor, the program code causing the processor to perform the steps of the clutch fill control method described above.
In particular, the storage medium can be a general-purpose storage medium, such as a removable disk, a hard disk, etc., and the computer program code on the storage medium, when executed, can cause the processor to perform the steps of the clutch fill control method described above.
The computer program product for performing the clutch oil filling control method provided in this embodiment includes a computer readable storage medium storing a program code, where instructions included in the program code may be used to execute the method in the foregoing method embodiment, and specific implementation may refer to the method embodiment, and details are not described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the apparatus described above may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (6)
1. A clutch fill control method, comprising:
judging whether the state parameters of the automatic transmission before gear shifting meet preset conditions or not; wherein the state parameters include an automatic transmission oil temperature parameter and an output shaft acceleration parameter;
if the state parameters of the automatic transmission before gear shifting meet preset conditions, determining input shaft acceleration data during gear shifting;
determining a fill height of the clutch based on the input shaft acceleration data;
the determining a fill height of a clutch based on the input shaft acceleration data includes:
performing oil pressure filling judgment on the input shaft acceleration data according to a preset oil filling judgment rule to generate judgment information;
when the judgment information indicates that the oil pressure is excessively filled, determining the oil filling height of the clutch according to a preset height difference value;
the input shaft acceleration data comprises an input rotating speed acceleration average value of a first time calibration interval, an acceleration variation of the first time calibration interval, an input rotating speed acceleration minimum value of a second time calibration interval, a moment corresponding to the input rotating speed acceleration minimum value, an acceleration variation of the second time calibration interval and an input rotating speed acceleration average value of a third time calibration interval;
the preset oil filling judgment rule is as follows:
judging whether the accelerator variable meets a specified condition or not;
if so, determining a fitting input rotation speed acceleration function based on the average value of the input rotation speed acceleration in the first time calibration interval and the average value of the input rotation speed acceleration in the third time calibration interval;
determining a fitted input rotational speed acceleration value of the second time calibration interval at a moment corresponding to the input rotational speed acceleration minimum value of the second time calibration interval based on the fitted input rotational speed acceleration function;
after the fitted input rotating speed acceleration value is determined, the following condition judgment is sequentially carried out, and if the fitted input rotating speed acceleration value is met, the clutch is judged to be excessively filled with oil pressure;
judging whether the acceleration variation of the first time calibration interval is smaller than a first preset threshold value or not;
judging whether the acceleration variation of the first time calibration interval and the acceleration variation of the second time calibration interval meet a first preset proportion condition or not;
and judging whether the difference value between the fitted input rotating speed acceleration value of the second time calibration interval and the minimum value of the input rotating speed acceleration of the second time calibration interval is greater than a second preset threshold value or not.
2. The method of claim 1, wherein the determining whether the state parameter of the automatic transmission before the shift meets a preset condition comprises:
judging whether the acceleration fluctuation of an output shaft before gear shifting is smaller than a preset acceleration threshold value and judging whether the temperature of the automatic transmission oil is within a preset temperature range;
and under the condition that the acceleration fluctuation of the output shaft is smaller than a preset acceleration threshold value before gear shifting and the oil temperature of the automatic transmission is within a preset temperature range, judging that the state parameters of the automatic transmission before gear shifting meet preset conditions.
3. The method of claim 1, wherein the determining input shaft acceleration data during a shift comprises:
acquiring input shaft rotating speed information during gear shifting;
input shaft acceleration data during the shift is determined based on the input shaft speed information.
4. The method of claim 3, wherein determining input shaft acceleration data during a shift based on the input shaft speed information comprises:
obtaining input shaft acceleration information based on the input shaft rotation speed information;
generating an input shaft acceleration curve based on the input shaft acceleration information;
input shaft acceleration data during a shift is determined based on the input shaft acceleration profile.
5. A clutch fill control apparatus, comprising:
the automatic transmission control device comprises a first determination module, a second determination module and a control module, wherein the first determination module is used for judging whether the state parameters of the automatic transmission before gear shifting meet preset conditions or not; wherein the state parameters include an automatic transmission oil temperature parameter and an output shaft acceleration parameter; if the state parameters of the automatic transmission before gear shifting meet preset conditions, determining input shaft acceleration data during gear shifting;
a second determination module to determine a fill height of the clutch based on the input shaft acceleration data;
the second determining module is used for performing oil pressure filling judgment on the input shaft acceleration data according to a preset oil filling judgment rule to generate judgment information;
when the judgment information indicates that the oil pressure is excessively filled, determining the oil filling height of the clutch according to a preset height difference value;
the input shaft acceleration data comprises an input rotating speed acceleration average value of a first time calibration interval, an acceleration variation of the first time calibration interval, an input rotating speed acceleration minimum value of a second time calibration interval, a moment corresponding to the input rotating speed acceleration minimum value, an acceleration variation of the second time calibration interval and an input rotating speed acceleration average value of a third time calibration interval;
the preset oil filling judgment rule is as follows:
judging whether the accelerator variable meets a specified condition or not;
if so, determining a fitting input rotation speed acceleration function based on the average value of the input rotation speed acceleration in the first time calibration interval and the average value of the input rotation speed acceleration in the third time calibration interval;
determining a fitted input rotational speed acceleration value of the second time calibration interval at a moment corresponding to the input rotational speed acceleration minimum value of the second time calibration interval based on the fitted input rotational speed acceleration function;
after the fitted input rotating speed acceleration value is determined, the following condition judgment is sequentially carried out, and if the fitted input rotating speed acceleration value is met, the clutch is judged to be excessively filled with oil pressure;
judging whether the acceleration variation of the first time calibration interval is smaller than a first preset threshold value or not;
judging whether the acceleration variation of the first time calibration interval and the acceleration variation of the second time calibration interval meet a first preset proportion condition or not;
and judging whether the difference value between the fitted input rotating speed acceleration value of the second time calibration interval and the minimum value of the input rotating speed acceleration of the second time calibration interval is greater than a second preset threshold value or not.
6. An electronic device, comprising: a processor, a memory and a bus, the memory storing machine readable instructions executable by the processor, the processor and the memory communicating over the bus when the electronic device is operating, the machine readable instructions when executed by the processor performing the steps of the clutch fill control method according to any one of claims 1 to 4.
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| CN201910688598.0A CN110307266B (en) | 2019-07-29 | 2019-07-29 | Oil filling control method and device for clutch |
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| CN201910688598.0A CN110307266B (en) | 2019-07-29 | 2019-07-29 | Oil filling control method and device for clutch |
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| CN110307266B true CN110307266B (en) | 2020-07-28 |
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| CN112709812B (en) * | 2019-10-24 | 2022-04-19 | 上汽通用汽车有限公司 | Clutch control self-learning method of gearbox, controller, gearbox and vehicle |
| CN111677855B (en) * | 2020-08-04 | 2021-08-03 | 盛瑞传动股份有限公司 | Control method for oil filling height of automatic transmission in quick oil filling stage |
| CN114811028B (en) * | 2022-03-17 | 2024-05-17 | 潍柴动力股份有限公司 | Vehicle gear shift control method, device, electronic equipment and storage medium |
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| JP2002310277A (en) * | 2001-04-12 | 2002-10-23 | Denso Corp | Control device for automatic transmission |
| US7653469B2 (en) * | 2006-07-25 | 2010-01-26 | Gm Global Technology Operations, Inc. | Automatic transmission shift point control system and method of use |
| JP5434889B2 (en) * | 2010-11-10 | 2014-03-05 | アイシン・エィ・ダブリュ株式会社 | Transmission and control method thereof |
| CN105840807B (en) * | 2016-04-22 | 2018-04-20 | 中国第一汽车股份有限公司 | A kind of shift control method based on acceleration compensation |
| CN108331915B (en) * | 2018-02-11 | 2020-01-10 | 安徽江淮汽车集团股份有限公司 | Control method and system for automatic gearbox of passenger car and freight car |
| CN109163087B (en) * | 2018-09-07 | 2020-08-14 | 一汽解放汽车有限公司 | Self-adaptive control method for torque of automatic transmission clutch |
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