CN103398169B - The non-anti-stall control system and method for fluid torque-converter formula Starting of Automatic Transmission - Google Patents
The non-anti-stall control system and method for fluid torque-converter formula Starting of Automatic Transmission Download PDFInfo
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- CN103398169B CN103398169B CN201310321189.XA CN201310321189A CN103398169B CN 103398169 B CN103398169 B CN 103398169B CN 201310321189 A CN201310321189 A CN 201310321189A CN 103398169 B CN103398169 B CN 103398169B
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Abstract
The invention discloses a kind of non-fluid torque-converter anti-extinguishing ignition control system of formula Starting of Automatic Transmission, including transmission control unit and engine control unit；Transmission control unit controls the pressure of clutch when vehicle start to be increased；Engine control unit is monitored engine loading in real time and is changed and draw engine misses rotating speed this moment when vehicle start, and engine misses rotating speed this moment and engine speed this moment are sent to transmission control unit by engine control unit in the lump；Transmission control unit increases a rotating speed side-play amount on the basis of engine misses rotating speed and obtains engine speed lower limit this moment, and engine speed this moment and engine speed lower limit is this moment compared；If engine speed this moment is less than engine speed lower limit this moment, transmission control unit controls clutch and reduces pressure；If engine speed this moment is more than engine speed lower limit this moment, transmission control unit controls clutch and increases pressure.
Description
Technical field
The present invention relates to Technology of Automatic Transmission for vehicle field；Particularly to a kind of non-anti-stall control system and method for fluid torque-converter formula Starting of Automatic Transmission.
Background technology
For conventional sequence formula automatic transmission, due to the effect of fluid torque-converter, during vehicle start, electromotor will not be caused load changing by variator.But for the automatic transmission without fluid torque-converter such as double-clutch speed changer, buncher, during vehicle start, due to the unexpected increase of clutch pressure, the load of sudden change can be brought to electromotor, be easily caused engine misses.Especially driver does not step on the gas, and starts to walk with idling, and now electromotor is less for the moment of torsion overcoming static friction, very easily flame-out.
Summary of the invention
Embodiments provide a kind of non-anti-stall control system and method for fluid torque-converter formula Starting of Automatic Transmission, it is to avoid vehicle causes engine misses when starting due to increasing suddenly of clutch pressure.Described technical scheme is as follows:
A kind of non-fluid torque-converter anti-extinguishing ignition control system of formula Starting of Automatic Transmission, including:
Transmission control unit, described transmission control unit controls the pressure of clutch when vehicle start to be increased；
Engine control unit, described engine control unit is monitored engine loading in real time and is changed and draw engine misses rotating speed this moment when vehicle start, and engine misses rotating speed this moment and engine speed this moment are sent to described transmission control unit by described engine control unit in the lump；
Described transmission control unit increases a rotating speed side-play amount on the basis of engine misses rotating speed and obtains engine speed lower limit this moment, and engine speed this moment and engine speed lower limit is this moment compared；If engine speed this moment is less than engine speed lower limit this moment, described transmission control unit controls clutch and reduces pressure；If engine speed this moment is more than engine speed lower limit this moment, described transmission control unit controls clutch and increases pressure.
Further, described transmission control unit receives gear lever signal, GES and brake pressure signal, and judges whether vehicle is in the starting stage according to each signal received.
Further, when gear lever be in traveling shelves, speed be zero and brake pressure release time, described transmission control unit judges that vehicle is in the starting stage.
Further, described rotating speed side-play amount is a fixed value.
A kind of non-fluid torque-converter anti-stall control method of formula Starting of Automatic Transmission, including:
The pressure controlling clutch when vehicle start increases；
Monitor engine loading in real time change when vehicle start and draw engine misses rotating speed this moment；
The basis of engine misses rotating speed increases a rotating speed side-play amount and obtains engine speed lower limit this moment, and engine speed this moment and engine speed lower limit this moment are compared；
If engine speed this moment is less than engine speed lower limit this moment, then controls clutch and reduce pressure；If engine speed this moment is more than engine speed lower limit this moment, then controls clutch and increase pressure.
Further, the described pressure increase controlling clutch when vehicle start specifically includes: is received gear lever signal, GES and brake pressure signal by transmission control unit, and judges whether vehicle is in the starting stage according to each signal received；When transmission control unit judges that vehicle is in the starting stage, sending clutch pressure signals to clutch actuating mechanism, start clutch pressure is carried out closed loop control, control clutch starts joint and clutch pressure starts to increase.
Further, the step obtaining described engine speed lower limit includes: is monitored engine loading in real time when vehicle start by engine control unit and changes and draw engine misses rotating speed this moment, and engine misses rotating speed this moment and engine speed this moment are sent to transmission control unit in the lump；Transmission control unit increases a rotating speed side-play amount on the basis of engine misses rotating speed and obtains engine speed lower limit this moment.
Further, described rotating speed side-play amount is a fixed value.
The technical scheme that the embodiment of the present invention provides has the benefit that the non-fluid torque-converter anti-extinguishing ignition control system of formula Starting of Automatic Transmission and control method that above-described embodiment provides, introduce a new clutch pressure control signal and engine speed lower limit, transmission control unit carries out the Stress control of clutch according to this control signal, transmission control unit is using engine speed lower limit as one of control condition of clutch pressure, and this engine speed lower limit is equal to engine misses rotating speed and rotating speed side-play amount sum, therefore this engine speed lower limit is consistently higher than engine misses rotating speed, can more effectively avoid vehicle when starting, clutch pressure increases suddenly and causes engine misses.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in the embodiment of the present invention, below the accompanying drawing used required during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of non-fluid torque-converter anti-extinguishing ignition control system of formula Starting of Automatic Transmission that the embodiment of the present invention provides；
Fig. 2 is the graph of relation in a kind of non-fluid torque-converter anti-extinguishing ignition control system of formula Starting of Automatic Transmission that the embodiment of the present invention provides between clutch state and engine speed；
Fig. 3 is the control flow chart of a kind of non-fluid torque-converter anti-extinguishing ignition control system of formula Starting of Automatic Transmission that the embodiment of the present invention provides；
Fig. 4 is the flow chart of a kind of non-fluid torque-converter anti-stall control method of formula Starting of Automatic Transmission that the embodiment of the present invention provides.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is further described.
Refer to Fig. 1, Fig. 1 is the structural representation of the non-fluid torque-converter anti-extinguishing ignition control system of formula Starting of Automatic Transmission that the embodiment of the present invention provides, this control system includes transmission control unit 11 (TransmissionControlUnit, and engine control unit 12 (EngineControlUnit, ECU) TCU).This control system is used for the vehicle the being equipped with non-fluid torque-converter formula automatic transmission anti-stall control when starting, in the starting-up process of non-fluid torque-converter formula vehicle with automatic transmission, first it is that shift rod is linked into (or being linked in the early time) and travels shelves gears such as () D/S/L releasing of brake by driver, clutch starts to engage, increase along with clutch-apply pressure and degree of engagement strengthens, clutch input torque increases, the load of engine will be raised, thus engine speed can reduce, if clutch pressure rises too fast during starting, easily cause engine speed too low, even flame-out.The engine rotational speed signal that the transmission control unit 11 of this control system sends according to engine control unit 12, correspondingly adjust the activating pressure of clutch, by the mutual coordinated of engine control unit 12 and transmission control unit 11, reach to prevent situation flame-out when starting to walk from occurring.
Incorporated by reference to graph of relation between clutch state and engine speed in the non-fluid torque-converter anti-extinguishing ignition control system of formula Starting of Automatic Transmission provided for the embodiment of the present invention with reference to Fig. 2, Fig. 2, in Fig. 2, the implication representated by each curve is as follows:
Curve 21 represents engine target idling, when namely accelerator open degree is zero, and the rotating speed of target of electromotor.
Curve 22 represents engine misses rotating speed, and this rotating speed is engine control unit 12 according to engine behavior, the minimum speed maintaining electromotor operating drawn, once rotating speed is lower than this restriction, electromotor will be flame-out.
Curve 23 represents engine speed lower limit, be transmission control unit 11 on the basis of engine misses rotating speed (curve 22), a rotating speed side-play amount D1 is set, the engine speed limiting parameter drawn, for the control of starting stage clutch pressure.Wherein, engine speed lower limit (curve 23) adds the rotating speed side-play amount D1, i.e. engine speed lower limit=engine misses rotating speed+rotating speed side-play amount D1 that arrange equal to engine misses rotating speed (curve 22).
Curve 24 represents engine speed, namely actual engine speed.
Curve 25 represents clutch state, is divided into three phases, and respectively clutch is opened, clutch slipping and clutch engage, wherein the control that controls to rub mainly for the cunning in clutch slipping stage of the present embodiment.
Incorporated by reference to the control flow chart of the non-fluid torque-converter anti-extinguishing ignition control system of formula Starting of Automatic Transmission provided for the embodiment of the present invention with reference to Fig. 3, Fig. 3, the anti-stall control process of starting of the present embodiment is:
First stage: the gear lever of automatic transmission switches to traveling shelves (D/S/L shelves) from neutral gear (N) or park position (P), and driver slams brake pedal, and vehicle is parked in original place.Meanwhile, transmission control unit 11 receives gear lever signal, GES and brake pressure signal, and judges whether vehicle is in the starting stage according to each signal received；When gear lever be in traveling shelves, speed be zero and brake pressure release time, transmission control unit 11 judges that vehicle is in the starting stage；
Second stage: driver starts releasing of brake pedal, now transmission control unit 11 receives the signal that brake pressure unclamps, transmission control unit 11 sends clutch pressure signals to clutch actuating mechanism, start clutch pressure is carried out closed loop control, control clutch starts joint and clutch pressure starts to increase, now clutch enters and slides the stage of rubbing and transmit moment of torsion, and the load of engine starts to raise, and engine speed (curve 24) begins to decline.Meanwhile, engine control unit 12 monitors engine loading in real time, draws an engine misses rotating speed (if electromotor is lower than this rotating speed, will stop working) this moment, and engine misses rotating speed this moment and engine speed this moment are delivered to CAN in the lump.Transmission control unit 11 receives engine misses rotating speed and engine speed by CAN from engine control unit 12, the basis of engine misses rotating speed increases a rotating speed side-play amount D1, obtain an engine speed lower limit, engine speed (curve 24) and engine speed lower limit (curve 23) are contrasted by transmission control unit 11, if engine speed is less than engine speed lower limit, then transmission control unit 11 controls clutch and reduces pressure, to reduce engine loading；If engine speed is more than engine speed lower limit, then transmission control unit 11 controls clutch and increases pressure, until clutch is fully engaged.Preferably, this rotating speed side-play amount D1 is a fixed value, for instance 200RPM.
Specifically, clutch's jointing process can be divided into two states:
A kind of state is not for transmit engine torque, and being namely entirely zero from clutch pressure, transmission control unit 11 is gradually increased clutch pressure, the state coming into contact with to clutch and transmit moment of torsion；
Another kind of state is transmission engine torque, and namely starting to transmit moment of torsion from clutch starts, and transmission control unit 11 continues to increase clutch pressure, transmits more engine torque to the state of variator；
Clutch starts to transmit the critical point of moment of torsion and is called biting point (see A point in Fig. 2 Suo Shi).
In automatic gearshift automobile starting-up process, after flame-out risk is primarily present in biting point appearance, now variator starts to increase the load of electromotor, makes engine speed decline.If clutch pressure rises too fast, it is easy to cause engine speed too low, even flame-out.In the pressure control procedure in clutch slipping stage, engine speed (curve 24) and engine speed lower limit (curve 23) are contrasted by transmission control unit 11, if engine speed is less than engine speed lower limit, then transmission control unit 11 controls clutch and reduces pressure, to reduce engine loading；When transmission control unit 11 reduces clutch pressure, can ensure that clutch pressure is maintained at more than biting point, namely ensure have moment of torsion to be delivered to variator, to prevent vehicle losing power.
Phase III: clutch is fully engaged, vehicle overcomes static friction, completes starting.
Refer to the flow chart of a kind of non-fluid torque-converter anti-stall control method of formula Starting of Automatic Transmission that Fig. 4, Fig. 4 provide for the embodiment of the present invention, described method includes:
S101: the pressure controlling clutch when vehicle start increases；
S102: monitor engine loading when vehicle start in real time and change and draw engine misses rotating speed this moment；
S103: increase a rotating speed side-play amount on the basis of engine misses rotating speed and obtain engine speed lower limit this moment, and engine speed this moment and engine speed lower limit this moment are compared；
S104: if engine speed this moment is less than engine speed lower limit this moment, then control clutch and reduce pressure；If engine speed this moment is more than engine speed lower limit this moment, then controls clutch and increase pressure.
Specifically, the described pressure increase controlling clutch when vehicle start specifically includes: is received gear lever signal, GES and brake pressure signal by transmission control unit 11, and judges whether vehicle is in the starting stage according to each signal received；When transmission control unit 11 judges that vehicle is in the starting stage, sending clutch pressure signals to clutch actuating mechanism, start clutch pressure is carried out closed loop control, control clutch starts joint and clutch pressure starts to increase.
Specifically, the step obtaining described engine speed lower limit includes: is monitored engine loading in real time when vehicle start by engine control unit and changes and draw engine misses rotating speed this moment, and engine misses rotating speed this moment and engine speed this moment are sent to transmission control unit in the lump；Transmission control unit increases a rotating speed side-play amount on the basis of engine misses rotating speed and obtains engine speed lower limit this moment.
The non-anti-stall control system and method for fluid torque-converter formula Starting of Automatic Transmission that above-described embodiment provides, introduce a new clutch pressure control signal, i.e. engine speed lower limit, transmission control unit 11 carries out clutch pressure control according to this control signal, transmission control unit 11 is using engine speed lower limit as one of control condition of clutch pressure, and this engine speed lower limit is equal to engine misses rotating speed and rotating speed side-play amount sum, therefore this engine speed lower limit is consistently higher than engine misses rotating speed, can more effectively avoid vehicle when starting, clutch pressure increases suddenly and causes engine misses.
It should be noted that, in this article, term " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, so that include the process of a series of key element, method, article or equipment not only include those key elements, but also include other key elements being not expressly set out, or also include the key element intrinsic for this process, method, article or equipment.When there is no more restriction, statement " including ... " key element limited, it is not excluded that there is also other identical element in including the process of described key element, method, article or equipment.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (8)
1. the non-fluid torque-converter anti-extinguishing ignition control system of formula Starting of Automatic Transmission, it is characterised in that including:
Transmission control unit (11), described transmission control unit (11) controls the pressure increase and decrease of clutch when vehicle start；
Engine control unit (12), described engine control unit (12) is monitored engine loading in real time and is changed and draw engine misses rotating speed this moment and engine target idling when vehicle start, and engine misses rotating speed this moment, engine target idling and engine speed this moment are sent to described transmission control unit (11) by described engine control unit (12) in the lump；
Described transmission control unit (11) increases a rotating speed side-play amount on the basis of engine misses rotating speed and obtains engine speed lower limit this moment, and engine speed this moment and engine speed lower limit this moment are compared, wherein engine speed lower limit this moment is less than engine target idling；If engine speed this moment is less than engine speed lower limit this moment, described transmission control unit (11) controls clutch and reduces pressure；If engine speed this moment is more than engine speed lower limit this moment, described transmission control unit (11) controls clutch and increases pressure.
2. the non-fluid torque-converter anti-extinguishing ignition control system of formula Starting of Automatic Transmission as claimed in claim 1, it is characterized in that, described transmission control unit (11) receives gear lever signal, GES and brake pressure signal, and judges whether vehicle is in the starting stage according to each signal received.
3. the non-fluid torque-converter anti-extinguishing ignition control system of formula Starting of Automatic Transmission as claimed in claim 2, it is characterized in that, when gear lever be in traveling shelves, speed be zero and brake pressure release time, described transmission control unit (11) judges that vehicle is in the starting stage.
4. the non-fluid torque-converter anti-extinguishing ignition control system of formula Starting of Automatic Transmission as claimed in claim 1, it is characterised in that described rotating speed side-play amount is a fixed value.
5. the non-fluid torque-converter anti-stall control method of formula Starting of Automatic Transmission, it is characterised in that including:
The pressure controlling clutch when vehicle start increases；
Monitor engine loading in real time change when vehicle start and draw engine misses rotating speed this moment and engine target idling；
The basis of engine misses rotating speed increases a rotating speed side-play amount and obtains engine speed lower limit this moment, and engine speed this moment and engine speed lower limit this moment are compared, wherein engine speed lower limit this moment is less than engine target idling；
If engine speed this moment is less than engine speed lower limit this moment, then controls clutch and reduce pressure；If engine speed this moment is more than engine speed lower limit this moment, then controls clutch and increase pressure.
6. the non-fluid torque-converter anti-stall control method of formula Starting of Automatic Transmission as claimed in claim 5, it is characterized in that, the described pressure increase controlling clutch when vehicle start specifically includes: is received gear lever signal, GES and brake pressure signal by transmission control unit (11), and judges whether vehicle is in the starting stage according to each signal received；When transmission control unit (11) judges that vehicle is in the starting stage, sending clutch pressure signals to clutch actuating mechanism, start clutch pressure is carried out closed loop control, control clutch starts joint and clutch pressure starts to increase.
7. the non-fluid torque-converter anti-stall control method of formula Starting of Automatic Transmission as claimed in claim 5, it is characterized in that, the step obtaining described engine speed lower limit includes: is monitored engine loading in real time when vehicle start by engine control unit (12) and changes and draw engine misses rotating speed this moment, and engine misses rotating speed this moment and engine speed this moment are sent to transmission control unit (11) in the lump；Transmission control unit (11) increases a rotating speed side-play amount on the basis of engine misses rotating speed and obtains engine speed lower limit this moment.
8. the non-fluid torque-converter anti-stall control method of formula Starting of Automatic Transmission as claimed in claim 5, it is characterised in that described rotating speed side-play amount is a fixed value.
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| CN104989537B (en) * | 2015-05-27 | 2017-04-12 | 安徽江淮汽车集团股份有限公司 | Anti-flameout control method for hybrid power engine |
| CN106627445A (en) * | 2017-01-03 | 2017-05-10 | 湖北弘方科技股份有限公司 | Automotive anti-breakdown design method |
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| US6254512B1 (en) * | 1996-12-26 | 2001-07-03 | Hitachi, Ltd. | Control apparatus and method for an automatic transmission of a vehicle |
| CN102069796A (en) * | 2010-12-16 | 2011-05-25 | 奇瑞汽车股份有限公司 | Hybrid electric vehicle start auxiliary control method |
| CN102536479A (en) * | 2012-02-08 | 2012-07-04 | 重庆长安汽车股份有限公司 | Logic control method for improving starting performance of vehicle |
| CN102877972A (en) * | 2012-06-27 | 2013-01-16 | 浙江吉利汽车研究院有限公司杭州分公司 | Auxiliary vehicle starting device and control manner thereof |
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| JP2009236264A (en) * | 2008-03-28 | 2009-10-15 | Aisin Aw Co Ltd | Control device for automatic transmission |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6254512B1 (en) * | 1996-12-26 | 2001-07-03 | Hitachi, Ltd. | Control apparatus and method for an automatic transmission of a vehicle |
| CN102069796A (en) * | 2010-12-16 | 2011-05-25 | 奇瑞汽车股份有限公司 | Hybrid electric vehicle start auxiliary control method |
| CN102536479A (en) * | 2012-02-08 | 2012-07-04 | 重庆长安汽车股份有限公司 | Logic control method for improving starting performance of vehicle |
| CN102877972A (en) * | 2012-06-27 | 2013-01-16 | 浙江吉利汽车研究院有限公司杭州分公司 | Auxiliary vehicle starting device and control manner thereof |
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