KR20160031744A - Apparatus for controlling line pressure during transmission in transmisson of vehicle and method thereof - Google Patents
Apparatus for controlling line pressure during transmission in transmisson of vehicle and method thereof Download PDFInfo
- Publication number
- KR20160031744A KR20160031744A KR1020140121803A KR20140121803A KR20160031744A KR 20160031744 A KR20160031744 A KR 20160031744A KR 1020140121803 A KR1020140121803 A KR 1020140121803A KR 20140121803 A KR20140121803 A KR 20140121803A KR 20160031744 A KR20160031744 A KR 20160031744A
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- South Korea
- Prior art keywords
- line pressure
- shifting
- gear stage
- target gear
- during
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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
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Control Of Transmission Device (AREA)
Abstract
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a line pressure control apparatus and method for shifting a vehicle transmission, and more particularly to a line pressure control apparatus and a method thereof for controlling a line pressure during a shift when a vehicle transmission is shifting will be.
The hydraulic control system is applied to an automatic transmission for a vehicle. The hydraulic control system controls the line pressure of the vehicle transmission during shifting.
The automatic transmission vehicle automatically controls the hydraulic pressure in a range set to reach the target speed change stage in accordance with the running speed of the vehicle so that the desired shift operation is performed. Therefore, the vehicle whose operation state is controlled according to the hydraulic pressure is supplied with fluid pressure from the oil pump according to the position of the shift lever of the driver. Then, the operation state of the hydraulic valve is changed by the fluid pressure, so that the vehicle selects one gear position.
That is, the vehicle controls the operation of a friction element made up of a clutch or a brake to switch the operation of the planetary gear set. A desired gear ratio is determined by switching the operation of the planetary gear set. Then, it is transmitted to the drive gear corresponding to the predetermined gear ratio.
However, when the applied line pressure is excessively high, the excessive engagement capacity of the friction element becomes excessively high, which may cause a great impact to the vehicle. In addition, the fuel consumption may be lowered. On the other hand, if the applied line pressure is too low, slip may occur. This may result in shortening the operating life of the friction element by slip.
In the case of an automatic transmission vehicle, shifting is effected by hydraulic pressure for operating the clutch. If the line pressure is excessively high as described above, the transient tightening capacity of the friction element is increased, so that an impact may be generated and the fuel efficiency may be lowered.
However, in the line pressure control system of the conventional line pressure control system, the line pressure control system is always controlled to a duty of '1' in order to increase the frictional element coupling performance. A method of always controlling the duty to '1' affects the durability and fuel economy of the transmission clutch.
Therefore, there is a need for a line pressure control technology that can ensure durability and improve fuel economy.
The embodiments of the present invention compare the line pressure of the current and target gear stages with the lowest line pressure required for shift when the shift from the present gear stage to the target gear stage is made and set the maximum value to the line pressure during shifting, And to improve the fuel economy of the vehicle, and to provide a method for controlling the line pressure during shifting of the vehicle transmission.
According to a first aspect of the present invention, there is provided a vehicular drive system including: a detecting portion that detects a speed change state of a vehicle transmission, a current gear, and a target gear; A storage unit for storing a line pressure per gear position and a minimum line pressure required during a shift; The line pressure of the present gear stage, the line pressure of the present gear stage, the line pressure of the current gear stage, the line pressure of the target gear stage, A control unit for setting the maximum line pressure in the line pressure as a line pressure during shifting; And a line pressure supply section for supplying line pressure in accordance with the line pressure during the set shifting.
A line pressure comparator for comparing the line pressure of the current gear stage, the line pressure of the target gear stage and the required minimum line pressure during the shift when the transmission is shifting; And comparing the line pressure of the current gear with the required minimum line pressure during the shift or comparing the line pressure of the target gear with the required minimum line pressure in the shift, And a line pressure setting section for setting the maximum line pressure to the line pressure during shifting among the line pressure of the gear stage and the lowest line pressure required during shifting.
The line pressure comparator compares the line pressure of the present gear stage with the lowest line pressure required during shifting when the line pressure of the present gear stage is equal to or higher than the line pressure of the target gear stage, , It is possible to compare the line pressure of the target gear stage to the minimum line pressure necessary for shifting.
The line pressure setting section sets the line pressure during the shifting to the line pressure of the current gear stage when the line pressure of the present gear stage is equal to or higher than the line pressure of the target gear stage and a necessary minimum line pressure during the shift, The line pressure during shifting is set to the line pressure of the target gear stage and the minimum line pressure required during shifting is equal to or higher than the line pressure of the current gear stage and the line pressure of the target gear stage The line pressure during shifting can be set to the minimum line pressure required during shifting.
The line pressure of the current gear and the line pressure of the target gear in the control unit may be the baseline pressure of the current gear and the baseline pressure of the target gear, respectively.
The storage unit further stores a preset tilt setting map for reaching the line pressure of the target gear stage, and the line pressure control unit may change the line pressure during shifting to the line pressure of the target gear according to the stored tilt setting map have.
Wherein the storage unit stores a learning value map to be applied in the operation of the damper clutch, and the detecting unit detects whether or not the damper clutch is operating in the transmission of the vehicle, and the apparatus further comprises: And a line pressure compensator for compensating the line pressure during the shifting according to a learning value map applied during operation.
On the other hand, according to the second aspect of the present invention, there is provided a control method for a vehicle, comprising: detecting a shifting state of a vehicle transmission, a current gear position and a target gear position; Determining whether the transmission is shifting or not; Comparing the line pressure of the present gear stage, the line pressure of the target gear stage and a necessary minimum line pressure during the shift when the transmission is shifting, Setting the maximum line pressure among the line pressure of the current gear stage, the line pressure of the target gear stage and the lowest line pressure required during the shifting to the line pressure during the shift according to the comparison result; And supplying the line pressure in accordance with the line pressure during the set shift, may be provided.
Wherein the comparing step comprises: the control unit comparing the line pressure of the current gear with the line pressure of the target gear; Comparing the line pressure of the present gear stage to a required minimum line pressure during shifting if the line pressure of the present gear stage is not less than the line pressure of the target gear stage; And comparing the line pressure of the target gear stage with a required minimum line pressure during shifting if the control section determines that the line pressure of the current gear is less than the line pressure of the target gear stage.
Wherein the step of setting the line pressure to the line pressure during the shifting sets the line pressure in the shift state to the line pressure of the current gear stage when the line pressure of the current gear stage is equal to or higher than the lowest line pressure of the target gear stage, The line pressure during shifting is set to the line pressure of the target gear stage when the line pressure of the target gear stage is equal to or higher than the line pressure of the current gear stage and the lowest line pressure required during shifting, And the line pressure of the target gear stage, it is possible to set the line pressure during shifting to the minimum line pressure required during shifting.
The method may further include changing the line pressure during shifting to the line pressure of the target gear in accordance with the slope setting map stored in advance by the control unit.
The method includes: detecting whether the damper clutch is operating in the transmission of the vehicle; And compensating the line pressure during the set shifting according to a learning value map applied when the damper clutch is operated when the damper clutch is in operation.
The embodiments of the present invention compare the line pressure of the current and target gear stages with the lowest line pressure required for shift when the shift from the present gear stage to the target gear stage is made and set the maximum value to the line pressure during shifting, And the fuel consumption can be improved.
Specifically, in the embodiments of the present invention, the line pressure of the gear stage before shifting when shifting starts is compared with the minimum line pressure required for shifting and the line pressure of the target gear stage at the end of shifting, and the line pressure The durability of the device can be ensured and the fuel consumption can be improved.
Embodiments of the present invention can reduce the transient tightening capacity of friction elements such as clutches or brakes through line pressure control during shifting and reduce the line pressure supplied from the oil pump to ensure mechanical durability and reduce fuel consumption Can be improved.
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a configuration diagram of a line pressure control device during a shift of a vehicle transmission according to an embodiment of the present invention; FIG.
2 and 3 are explanatory diagrams of a line pressure control process during shifting according to an embodiment of the present invention.
4 is a flowchart of a line pressure control method for shifting a vehicle transmission according to an embodiment of the present invention.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In describing the embodiments, descriptions of techniques which are well known in the technical field to which this specification belongs and which are not directly related to this specification are not described. This is for the sake of clarity without omitting the unnecessary explanation and without giving the gist of the present invention.
For the same reason, some of the components in the drawings are exaggerated, omitted, or schematically illustrated. Also, the size of each component does not entirely reflect the actual size. In the drawings, the same or corresponding components are denoted by the same reference numerals.
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a configuration diagram of a line pressure control device during a shift of a vehicle transmission according to an embodiment of the present invention; FIG.
Referring to FIG. 1, the line-
Hereinafter, each of the components of the line-
The
The
When the transmission is shifting, the
Meanwhile, the
Here, the
The
The
The line
For example, when the current gear position is shifted from the fifth gear position to the sixth gear position as the target gear position and the baseline pressure of the present gear position is the maximum line pressure, the line
The preset slope setting map may be additionally stored in the
In addition, a learning value map to be applied to the operation of the damper clutch may be stored in the
The embodiment of the present invention has been described with reference to FIG. However, this is merely one example for convenience of understanding and explanation of the present specification, and the present specification is not limited thereto.
FIGS. 2 and 3 are explanatory diagrams of a line pressure control process during shifting according to an embodiment of the present invention.
FIG. 2 shows the line pressure according to the time in the conventional line pressure control system.
The conventional line pressure control method will be described with reference to FIG. 2 when the present gear stage is 5 stages and the target gear stage is 6 stages before gear shifting is performed. Here, the section where gear shifting is performed includes the shifting
However, in the conventional line pressure control system, the duty is always controlled to '1' for the line pressure control in the
3 shows the line pressure with time in the line pressure control system according to the embodiment of the present invention.
The line pressure control method according to an embodiment of the present invention will be described with reference to FIG. 3 when the present gear stage is 5 stages and the target gear stage is 6 stages before gear shifting is performed as in FIG. The gear shifting period may include a
The line pressure control system according to the embodiment of the present invention does not always control the duty of '1' for the line pressure control in the
In the
4 is a flowchart of a line pressure control method for shifting a vehicle transmission according to an embodiment of the present invention.
The
If it is determined in step S402 that the transmission is shifting, the
If the line pressure of the present gear stage is equal to or greater than the line pressure of the target gear stage, the
If the line pressure of the current gear is greater than or equal to the minimum line pressure required during shifting, the
On the other hand, if the comparison result (S406) indicates that the line pressure of the current gear is less than the required minimum line pressure during shifting, the
On the other hand, if the comparison result (S404) indicates that the line pressure of the target gear stage is not less than the line pressure of the current gear stage, the
If the line pressure of the target gear stage is equal to or greater than the minimum line pressure required during shifting, the
On the other hand, if the comparison result (S412) indicates that the line pressure of the target gear is less than the required minimum line pressure during the shift, the
Then, the
If the damper clutch is in operation (S416), the
Then, the line
It will be understood by those skilled in the art that the present specification may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present specification is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents are included in the scope of the present specification Should be interpreted.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is not intended to limit the scope of the specification. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.
100: line pressure control device 110:
120: control unit 121: line pressure comparator
122: line pressure setting unit 123: line pressure compensating unit
130: line pressure supply unit 140:
Claims (12)
A storage unit for storing a line pressure per gear position and a minimum line pressure required during a shift;
The line pressure of the present gear stage, the line pressure of the present gear stage, the line pressure of the current gear stage, the line pressure of the target gear stage, A control unit for setting the maximum line pressure in the line pressure as a line pressure during shifting; And
A line pressure supply unit for supplying line pressure in accordance with the line pressure during the above-
Wherein the line-pressure control device is operable to control the speed of the vehicle.
The control unit
A line pressure comparator for comparing the line pressure of the present gear stage, the line pressure of the target gear stage and the necessary minimum line pressure during the shift when the transmission is shifting; And
The line pressure of the present gear stage is compared with the minimum line pressure required during the shift or the line pressure of the target gear stage is compared with the required minimum line pressure during the shift, And a line pressure setting section for setting the maximum line pressure among the minimum line pressure required during the shifting to the line pressure during shifting
Wherein the line-pressure control device is operable to control the speed of the vehicle.
The line-pressure comparator
If the line pressure of the present gear stage is equal to or less than the line pressure of the target gear stage, the line pressure of the present gear stage is compared with the lowest line pressure required during shifting. If the line pressure of the present gear stage is less than the line pressure of the target gear stage, To the required minimum line pressure during shifting.
The line-pressure setting unit
The line pressure during the shift is set to the line pressure of the current gear stage when the line pressure of the present gear stage is equal to or higher than the line pressure of the target gear stage and a necessary minimum line pressure during the shift, And the line pressure during the shifting is set to the line pressure of the target gear. If the minimum line pressure required during the shifting is not less than the line pressure of the present gear stage and the line pressure of the target gear stage, To the minimum line pressure required during shifting.
Wherein the line pressure of the current gear and the line pressure of the target gear in the control unit are respectively the baseline pressure of the current gear and the baseline pressure of the target gear.
Wherein the storage unit further stores a preset slope setting map for reaching the line pressure of the target gear,
And the line pressure control unit changes the line pressure during shifting to the line pressure of the target gear in accordance with the stored slope setting map.
Wherein the storage section stores a learning value map to be applied in operation of the damper clutch, the detecting section detects whether or not the damper clutch is operating in the transmission of the vehicle,
A line pressure compensating unit which compensates the line pressure during the shifting in accordance with a learning value map applied when the damper clutch is operated,
Further comprising: a line pressure sensor for detecting a line pressure of the vehicle;
Determining whether the transmission is shifting or not;
Comparing the line pressure of the present gear stage, the line pressure of the target gear stage and a necessary minimum line pressure during the shift when the transmission is shifting,
Setting the maximum line pressure among the line pressure of the current gear stage, the line pressure of the target gear stage and the lowest line pressure required during the shifting to the line pressure during the shift according to the comparison result; And
A step of supplying line pressure in accordance with the line pressure during the above-
Wherein the line pressure control means is operable to control the line pressure of the vehicle.
The step of comparing
Comparing the line pressure of the current gear with the line pressure of the target gear;
Comparing the line pressure of the present gear stage to a required minimum line pressure during shifting if the line pressure of the present gear stage is not less than the line pressure of the target gear stage; And
If the control unit determines that the line pressure of the current gear is less than the line pressure of the target gear, comparing the line pressure of the target gear with the lowest required line pressure during shifting
Wherein the line pressure control means is operable to control the line pressure of the vehicle.
The step of setting the line pressure during the shifting
The line pressure of the current gear position is set to the line pressure of the current gear position when the line pressure of the current gear position is equal to or higher than the required line pressure of the target gear position and the lowest line pressure necessary for shifting, The line pressure during shifting is set to the line pressure of the target gear. If the minimum line pressure required during shifting is equal to or greater than the line pressure of the present gear stage and the line pressure of the target gear stage, Wherein the line pressure is set to a minimum line pressure required during shifting.
Changing the line pressure during shifting to the line pressure of the target gear according to a tilt setting map stored in advance by the control unit
Further comprising the steps of:
Detecting whether the damper clutch is operating in the transmission of the vehicle; And
Compensating the line pressure during the set shifting according to a learning value map applied when the damper clutch is in operation when the damper clutch is in operation
Further comprising the steps of:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140121803A KR20160031744A (en) | 2014-09-15 | 2014-09-15 | Apparatus for controlling line pressure during transmission in transmisson of vehicle and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140121803A KR20160031744A (en) | 2014-09-15 | 2014-09-15 | Apparatus for controlling line pressure during transmission in transmisson of vehicle and method thereof |
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| Publication Number | Publication Date |
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| KR20160031744A true KR20160031744A (en) | 2016-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020140121803A KR20160031744A (en) | 2014-09-15 | 2014-09-15 | Apparatus for controlling line pressure during transmission in transmisson of vehicle and method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230081866A (en) * | 2021-11-30 | 2023-06-08 | 주식회사 현대케피코 | Method of Controlling Transmission Line Pressure of Hybrid Vehicle |
-
2014
- 2014-09-15 KR KR1020140121803A patent/KR20160031744A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230081866A (en) * | 2021-11-30 | 2023-06-08 | 주식회사 현대케피코 | Method of Controlling Transmission Line Pressure of Hybrid Vehicle |
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