CN105351512A - Clutch control method used in downshifting process of transmission of automatic transmission system - Google Patents
Clutch control method used in downshifting process of transmission of automatic transmission system Download PDFInfo
- Publication number
- CN105351512A CN105351512A CN201510763303.3A CN201510763303A CN105351512A CN 105351512 A CN105351512 A CN 105351512A CN 201510763303 A CN201510763303 A CN 201510763303A CN 105351512 A CN105351512 A CN 105351512A
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- China
- Prior art keywords
- clutch
- vehicle
- control
- signal
- gearbox
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Classifications
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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
- F16H59/50—Inputs being a function of the status of the machine, e.g. position of doors or safety belts
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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
- F16H59/50—Inputs being a function of the status of the machine, e.g. position of doors or safety belts
- F16H59/56—Inputs being a function of the status of the machine, e.g. position of doors or safety belts dependent on signals from the main clutch
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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
- F16H2306/00—Shifting
- F16H2306/40—Shifting activities
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention relates to a clutch control method used in the downshifting process of a transmission of an automatic transmission system. The clutch control method includes the steps that firstly, a vehicle signal is acquired; secondly, whether upshifting or downshifting of a vehicle is needed or not is judged according to the acquired vehicle signal; thirdly, if upshifting or downshifting is needed for the vehicle, upshifting or downshifting is judged according to a gear shifting control strategy; fourthly, the work condition of upshifting or downshifting needed for the vehicle is controlled according to the gear shifting control strategy, and separation control of a clutch is performed; fifthly, gear shifting control is performed according to separation of the clutch; and sixthly, after it is confirmed that gear shifting succeeds, combination control of the clutch is performed. By means of the technical scheme, deferential control over the clutch in the AMT transmission downshifting process is achieved, and the service life of a gear shifting synchronizer is prolonged.
Description
Technical field
The present invention relates to the gearbox control field of vehicle, more specifically relate to a kind of Transmission System gearbox downshift process clutch control method.
Background technique
During 12, along with the Ministry of Science and Technology and automobile industry the emphasis of commercial car AMT gearbox promoted and foster energetically, the research and development of AMT gearbox and promote like a raging fire carrying out.Each main engine factory and gearbox manufacturing enterprise successively develop many moneys model machine and have carried out a large amount of real vehicle certification tests, the Commercial Prospect of AMT gearbox is more and more distincter, by becoming the important directions of China's commercial car field gearbox automatic technology advance, play a part very important to the development of commercial car.
The gearshift procedure of AMT gearbox is identical with manual transmission, first cut-off clutch during gear shift, upshift or downshift, then in conjunction with clutch, realizes a gear shift of advancing for vehicle.Because AMT gearbox main tank structure is stabilized shaft gearbox, each gear exist certain between ratio, cause thus, vehicle is when downshifting, and transmission input shaft rotating speed needs to improve, but now clutch is separated, and transmission input shaft rotating speed is reducing gradually.Conventional controlling method, the main wear smooth by synchromesh unit promotes input shaft rotating speed, finally makes transmission input shaft and output shaft reach synchronous, realizes downshift gear shift.Due to commercial car clutch passive components and input shaft inertia relatively large, the downshift gear shift that multifrequency is secondary, will speed up the wearing and tearing of synchromesh unit, reduce the working life of synchromesh unit, a kind of downshift process clutch control method is provided, reduce the wear smooth of synchromesh unit, very large help will be played to the working life promoting synchromesh unit, the commercialization process of AMT gearbox can be accelerated.
Summary of the invention
The object of this invention is to provide a kind of Transmission System gearbox downshift process clutch control method, when realizing AMT gearbox downshift, the differentiation of clutch is controlled, improve the working life of synchromesh unit.
For achieving the above object, the present invention is by the following technical solutions: a kind of Transmission System gearbox downshift process clutch control method, comprising:
(1) collection vehicle signal;
(2) judge that vehicle is the need of lifting shelves according to the signals of vehicles collected;
(3) if vehicle needs to carry out lifting shelves, then upshift or downshift is judged according to gearshift control strategy;
(4) judge that vehicle needs the operating mode of upshift or downshift according to described gearshift control strategy, carry out clutch separation control; Described clutch separation controls to comprise normal gear change clutch separation and controls and the control of decelerating downshift clutch separation; Described normal gear change clutch separation controls according to shift control strategy, and solenoidoperated cluthes are separated, and plucks shelves control described gearbox;
Described deceleration shifting clutch separation controls according to shift control strategy, the separation of solenoidoperated cluthes and combination; When described clutch separation, shelves are plucked to gearbox and controls; Described clutch in conjunction with time, adjustment transmission input shaft rotating speed is to rotating speed of target;
(5) control to carry out gearshift according to described clutch separation to control;
(6) shift gears successfully in confirmation, carry out clutch and combine control.
Signals of vehicles in described step (1) comprises brake signal, vehicle speed signal, engine rotational speed signal, input shaft tach signal, accelerator opening amount signal, gear selection position signal, shift pattern signal and clutch position signal.
Described step (2) judges Current vehicle gear according to described gear selection position signal and shift pattern signal; Judge that vehicle is the need of lifting shelves according to described accelerator opening amount signal, engine rotational speed signal, vehicle speed signal and brake signal; As vehicle needs to be elevated shelves, then enter step (3).
As described in vehicle do not need be elevated shelves, then turn back to step (1) and re-start signals of vehicles collection.
In described step (3), judge according to gearshift control strategy if downshift operating mode, then judge vehicle accelerator aperture, when described accelerator open degree is greater than setting threshold value, then enters described step (4) and carry out the control of described normal gear change clutch separation; If when accelerator open degree is less than or equal to described setting threshold value, then enters described decelerating downshift clutch separation and control.
During normal gear change clutch separation in described step (4) controls, after shelves plucked by the described gearbox of confirmation, enter described step (5).
During deceleration shifting clutch separation in described step (4) controls, according to shift control strategy, solenoidoperated cluthes are separated, and after the described clutch of confirmation is separated completely, plucks shelves control gearbox; Calculate new gear input shaft rotating speed of target according to current vehicle speed, in conjunction with described clutch, adjustment input shaft rotating speed is to rotating speed of target, and finally cut-off clutch again, after confirmation clutch is separated completely, enters described step (5).
Described step (5) is poor according to the speed of the physical location of gear shifting oil cylinder in gearshift procedure and input shaft and output shaft, and dynamic realtime calculates berth-changing strength, carries out gearshift control to gearbox, after confirmation gear shift success, enters described step (6).
Described step (6) is poor according to the speed of engine speed and the speed of a motor vehicle, and dynamic calculation clutch is in conjunction with rule, and Controlling solenoid valve action, realizes the steady combination of clutch.
With immediate prior art ratio, the invention provides technological scheme and there is following excellent effect
1, technical solution of the present invention is when vehicle downshifts, and by the identification of control algorithm to downshift intention, screens out decelerating downshift operating mode and anxious acceleration downshift operating mode;
2, technical solution of the present invention accelerates downshift operating mode for anxious, takes the control strategy that clutch once combines, and avoids when suddenly accelerating downshift operating mode and causes shift time long because the secondary of clutch combines, affect the power performance of vehicle;
3, technical solution of the present invention is for decelerating downshift operating mode, takes the control strategy that clutch secondary combines, and the synchronous speed reducing synchromesh unit is poor, improves the working life of synchromesh unit;
4, technical solution of the present invention will play positive impetus to the commercialization process accelerating AMT gearbox;
5, technical solution of the present invention can be applicable in the AMT gearbox control system design of any vehicle.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention method flow diagram;
Fig. 2 is embodiment of the present invention method detail flowchart.
Embodiment
Below in conjunction with embodiment, the invention will be described in further detail.
Embodiment 1:
The invention of this example provides a kind of Transmission System gearbox downshift process clutch control method, comprises as depicted in figs. 1 and 2:
(101) signals of vehicles collection; Gather switching value, analog amount and frequency quantity signal, comprising: brake signal, vehicle speed signal, engine rotational speed signal, input shaft tach signal, accelerator opening amount signal, gear selection position signal, shift pattern signal, clutch position signal etc.
(102) vehicle lifting shelves judge; Judge current gear according to gear selection position signal, shift pattern signal etc., judge that vehicle is the need of lifting shelves according to accelerator opening amount signal, engine rotational speed signal, vehicle speed signal, brake signal etc.As vehicle does not need to be elevated shelves, turn back to step (101) and re-start signals of vehicles collection; As vehicle needs to be elevated shelves, enter vehicle downshift intention determining step (103).
(103) vehicle downshift intention judges; After judging that vehicle needs lifting shelves, determine whether according to control strategy the operating mode that downshifts, if not downshift operating mode, then program enters normal gear change clutch separation rate-determining steps (104); If downshift operating mode, then judge accelerator open degree, when accelerator open degree is greater than setting threshold value (this algorithm gets 85% temporarily), then enter normal gear change clutch separation rate-determining steps (104) module; If accelerator open degree is not more than when setting threshold value (this algorithm gets 85% temporarily), then program enters decelerating downshift clutch separation rate-determining steps (105);
(104) normal gear change clutch separation controls; According to shift control strategy, solenoidoperated cluthes are separated, and after confirmation clutch is separated completely, plucks shelves control gearbox, after gearbox confirms to pluck shelves, program enters gearshift control step (106);
(105) deceleration shifting clutch separation controls; According to shift control strategy, solenoidoperated cluthes are separated, after confirmation clutch is separated completely, pluck shelves to gearbox to control, calculate new gear input shaft rotating speed of target, then in conjunction with clutch according to current vehicle speed, adjustment input shaft rotating speed is to rotating speed of target, last cut-off clutch again, after confirmation clutch is separated completely, program enters gearshift control step (106);
(106) gearshift control; According to the physical location of gear shifting oil cylinder in gearshift procedure and the speed of input shaft and output shaft poor, dynamic realtime calculates berth-changing strength, carries out gearshift control to gearbox, and after confirming gear shift successfully, program enters clutch in conjunction with rate-determining steps (107);
(107) clutch combines and controls: the speed according to engine speed and the speed of a motor vehicle is poor, and dynamic calculation clutch is in conjunction with rule, and Controlling solenoid valve action, realizes the steady combination of clutch.
Signals of vehicles collection gathers mainly through the acquisition module in former vehicle-mounted gear box control unit (TCU);
Vehicle lifting shelves judge, vehicle downshift intention judges to process mainly through the single-chip microcomputer in former vehicle-mounted gear box control unit (TCU);
The control of normal gear change clutch separation, the control of deceleration shifting clutch separation, gearshift control, clutch combine and control to carry out drived control mainly through the driver module in former vehicle-mounted gear box control unit (TCU).
Finally should be noted that: above embodiment is only in order to illustrate that technological scheme of the present invention is not intended to limit; although those of ordinary skill in the field are to be understood that with reference to above-described embodiment: still can modify to the specific embodiment of the present invention or equivalent replacement; these do not depart from any amendment of spirit and scope of the invention or equivalent replacement, are all applying within the claims of the present invention awaited the reply.
Claims (9)
1. a Transmission System gearbox downshift process clutch control method, is characterized in that: comprise the following steps:
(1) collection vehicle signal;
(2) judge that vehicle is the need of lifting shelves according to the signals of vehicles collected;
(3) if vehicle needs to carry out lifting shelves, then upshift or downshift is judged according to gearshift control strategy;
(4) judge that vehicle needs the operating mode of upshift or downshift according to described gearshift control strategy, carry out clutch separation control; Described clutch separation controls to comprise normal gear change clutch separation and controls and the control of decelerating downshift clutch separation; Described normal gear change clutch separation controls according to shift control strategy, and solenoidoperated cluthes are separated, and plucks shelves control described gearbox;
Described deceleration shifting clutch separation controls according to shift control strategy, the separation of solenoidoperated cluthes and combination; When described clutch separation, shelves are plucked to gearbox and controls; Described clutch in conjunction with time, adjustment transmission input shaft rotating speed is to rotating speed of target;
(5) control to carry out gearshift according to described clutch separation to control;
(6) shift gears successfully in confirmation, carry out clutch and combine control.
2. a kind of Transmission System gearbox downshift process clutch control method as claimed in claim 1, is characterized in that: the signals of vehicles in described step (1) comprises brake signal, vehicle speed signal, engine rotational speed signal, input shaft tach signal, accelerator opening amount signal, gear selection position signal, shift pattern signal and clutch position signal.
3. a kind of Transmission System gearbox downshift process clutch control method as claimed in claim 2, is characterized in that: described step (2) judges Current vehicle gear according to described gear selection position signal and shift pattern signal; Judge that vehicle is the need of lifting shelves according to described accelerator opening amount signal, engine rotational speed signal, vehicle speed signal and brake signal; As vehicle needs to be elevated shelves, then enter step (3).
4. a kind of Transmission System gearbox downshift process clutch control method as claimed in claim 3, is characterized in that: as described in vehicle do not need to be elevated shelves, then turn back to step (1) and re-start signals of vehicles collection.
5. a kind of Transmission System gearbox downshift process clutch control method as claimed in claim 1, it is characterized in that: in described step (3), judge according to gearshift control strategy if downshift operating mode, then judge vehicle accelerator aperture, when described accelerator open degree is greater than setting threshold value, then enters described step (4) and carry out the control of described normal gear change clutch separation; If when accelerator open degree is less than or equal to described setting threshold value, then enters described decelerating downshift clutch separation and control.
6. a kind of Transmission System gearbox downshift process clutch control method as claimed in claim 1; it is characterized in that: during the normal gear change clutch separation in described step (4) controls; after shelves plucked by the described gearbox of confirmation, enter described step (5).
7. a kind of Transmission System gearbox downshift process clutch control method as claimed in claim 1, it is characterized in that: during the deceleration shifting clutch separation in described step (4) controls, according to shift control strategy, solenoidoperated cluthes are separated, after the described clutch of confirmation is separated completely, shelves is plucked to gearbox and controls; Calculate new gear input shaft rotating speed of target according to current vehicle speed, in conjunction with described clutch, adjustment input shaft rotating speed is to rotating speed of target, and finally cut-off clutch again, after confirmation clutch is separated completely, enters described step (5).
8. a kind of Transmission System gearbox downshift process clutch control method as claimed in claim 1, it is characterized in that: described step (5) is poor according to the speed of the physical location of gear shifting oil cylinder in gearshift procedure and input shaft and output shaft, dynamic realtime calculates berth-changing strength, gearshift control is carried out to gearbox, after confirmation gear shift success, enter described step (6).
9. a kind of Transmission System gearbox downshift process clutch control method as claimed in claim 1, it is characterized in that: described step (6) is poor according to the speed of engine speed and the speed of a motor vehicle, dynamic calculation clutch is in conjunction with rule, Controlling solenoid valve action, realizes the steady combination of clutch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510763303.3A CN105351512B (en) | 2015-11-10 | 2015-11-10 | A kind of Transmission System gearbox downshift process clutch control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510763303.3A CN105351512B (en) | 2015-11-10 | 2015-11-10 | A kind of Transmission System gearbox downshift process clutch control method |
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| Publication Number | Publication Date |
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| CN105351512A true CN105351512A (en) | 2016-02-24 |
| CN105351512B CN105351512B (en) | 2018-09-14 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907480A (en) * | 2017-03-23 | 2017-06-30 | 中国第汽车股份有限公司 | A kind of method of discrimination of automobile-used shift handle shift mode |
| CN107152526A (en) * | 2017-07-03 | 2017-09-12 | 合肥工业大学 | A kind of big-powered tractor power downshift control method for considering diesel engine speed regulation characteristic |
| CN107366740A (en) * | 2017-05-22 | 2017-11-21 | 中国第汽车股份有限公司 | A kind of clutch oil-filled duration control method in high-power AT shift processes |
| CN109606371A (en) * | 2018-12-17 | 2019-04-12 | 安徽江淮汽车集团股份有限公司 | Engine and speed changer control method for coordinating in gearshift procedure |
| CN110816297A (en) * | 2019-12-09 | 2020-02-21 | 八方电气(苏州)股份有限公司 | Electric motorcycle automatic speed changing system and control method thereof |
| CN112525524A (en) * | 2020-11-30 | 2021-03-19 | 奇瑞汽车股份有限公司 | Automatic gear shifting device and automatic gear shifting method of manual transmission |
| CN113027942A (en) * | 2021-03-03 | 2021-06-25 | 中国北方车辆研究所 | AT clutch control method under braking condition |
| CN113639034A (en) * | 2021-08-23 | 2021-11-12 | 安徽江淮汽车集团股份有限公司 | Gear shifting control method for 2-speed AMT (automated mechanical Transmission) transmission of commercial vehicle |
| CN113898728A (en) * | 2021-08-31 | 2022-01-07 | 胡冬桂 | Automobile gear control method and device |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907480A (en) * | 2017-03-23 | 2017-06-30 | 中国第汽车股份有限公司 | A kind of method of discrimination of automobile-used shift handle shift mode |
| CN107366740A (en) * | 2017-05-22 | 2017-11-21 | 中国第汽车股份有限公司 | A kind of clutch oil-filled duration control method in high-power AT shift processes |
| CN107366740B (en) * | 2017-05-22 | 2018-11-09 | 中国第一汽车股份有限公司 | A kind of clutch oil-filled duration control method in high-power AT shift processes |
| CN107152526A (en) * | 2017-07-03 | 2017-09-12 | 合肥工业大学 | A kind of big-powered tractor power downshift control method for considering diesel engine speed regulation characteristic |
| CN107152526B (en) * | 2017-07-03 | 2018-11-06 | 合肥工业大学 | A kind of big-powered tractor power downshift control method considering diesel engine speed regulation characteristic |
| CN109606371A (en) * | 2018-12-17 | 2019-04-12 | 安徽江淮汽车集团股份有限公司 | Engine and speed changer control method for coordinating in gearshift procedure |
| CN110816297A (en) * | 2019-12-09 | 2020-02-21 | 八方电气(苏州)股份有限公司 | Electric motorcycle automatic speed changing system and control method thereof |
| CN112525524A (en) * | 2020-11-30 | 2021-03-19 | 奇瑞汽车股份有限公司 | Automatic gear shifting device and automatic gear shifting method of manual transmission |
| CN113027942A (en) * | 2021-03-03 | 2021-06-25 | 中国北方车辆研究所 | AT clutch control method under braking condition |
| CN113027942B (en) * | 2021-03-03 | 2022-08-09 | 中国北方车辆研究所 | AT clutch control method under braking condition |
| CN113639034A (en) * | 2021-08-23 | 2021-11-12 | 安徽江淮汽车集团股份有限公司 | Gear shifting control method for 2-speed AMT (automated mechanical Transmission) transmission of commercial vehicle |
| CN113898728A (en) * | 2021-08-31 | 2022-01-07 | 胡冬桂 | Automobile gear control method and device |
Also Published As
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|---|---|
| CN105351512B (en) | 2018-09-14 |
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