CN104590252A - Reverse sliding control method based on stability control system (SCS) - Google Patents
Reverse sliding control method based on stability control system (SCS) Download PDFInfo
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- CN104590252A CN104590252A CN201310531148.3A CN201310531148A CN104590252A CN 104590252 A CN104590252 A CN 104590252A CN 201310531148 A CN201310531148 A CN 201310531148A CN 104590252 A CN104590252 A CN 104590252A
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- Prior art keywords
- vehicle
- scs
- slipping
- control method
- control system
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
- B60T2201/04—Hill descent control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
- B60T2201/06—Hill holder; Start aid systems on inclined road
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2250/00—Monitoring, detecting, estimating vehicle conditions
- B60T2250/04—Vehicle reference speed; Vehicle body speed
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention belongs to the field of automobile braking systems, and provides a reverse sliding control method based on a stability control system (SCS). According to the method, in the hill starting process of an automobile, when at least one of the following two conditions is met, the SCS controls an HAS function module to stop working and activates an HRC function module so as to prevent the reverse sliding speed of the automobile from exceeding the maximum permission reverse sliding speed, wherein the two conditions comprise the first condition that hill starting fails and a brake pedal is not trodden to brake and the second condition that overheating faults happen to a speed changing box. The HRC function module brakes wheels of the automobile actively when being activated. By the adoption of the control method, reverse sliding accidents can be effectively avoided.
Description
Technical field
The invention belongs to brake system of car field, relate to a kind of control method of slipping based on stabilizing control system (Stability Control System, SCS).
Background technology
The stabilizing control system (SCS) of vehicle is developed so far, anti-lock, polling power controlling, Dynamic Stability Control (Dynamic Stability Control can be realized, the functions such as DSC), uphill starting assists (Hill-start Assist, HSA), emergency braking is assisted.Wherein, Dynamic Stability Control can the actv. vehicle whipping, the sideslip that prevent tyre slip from causing and the phenomenon such as dynamic property is not good under various surface conditions, greatly improves drive safety, stability and dynamic property.
In daily life, due to reasons such as vehicle operating are improper, vehicle often can occur to slip on ramp, causes collision case, causes thing to damage even personal damage.And existing dynamic stability control system slips to vehicle and there is no any corresponding control policy.
Further, along with the progressively maturation of double clutch gearbox (DCT) technology, DCT is because its superior economical and smooth-going gearshift performance is subject to the favor of many main engine plants.But be subject to the restriction of its hardware design, DCT has the relatively easy shortcoming that overheating fault occurs.If when there is overheating fault in uphill starting process, vehicle will run out of steam, and easy generation is slipped, and there is very large security risk.
Summary of the invention
An object of the present invention is, provides to slip protection when DCT is overheated.
Another object of the present invention is, prevents from, because of misoperation, the accident of slipping occurs.
For realizing above object or other objects, the invention provides a kind of control method of slipping based on stabilizing control system (SCS), wherein, described stabilizing control system (SCS) has auxiliary (HSA) functional module of uphill starting; It is characterized in that, described stabilizing control system (SCS) also has ramp and slips control (HRC) functional module; Vehicle under upward slope working condition is in uphill starting process, at least meeting following two conditions a period of time, described stabilizing control system (SCS) makes described HSA functional module quit work and activates described HRC functional module to slip speed to prevent the speed of slipping of vehicle from exceeding maximum permission;
Wherein, described two conditions are:
Condition one, uphill starting is failed and brake pedal is not operated braking,
Condition two, change speed gear box generation overheating fault;
Wherein, the wheel braking initiatively to the described vehicle under upward slope working condition when described HRC functional module is activated.
According to the control method of slipping of one embodiment of the invention, wherein, before judging whether to meet described two conditions, further comprising the steps of:
Determine that vehicle is in uphill starting state based on the ramp signal at least gathered, gear signal, vehicle speed signal, output shaft rotation direction and brake pedal signal; And
HSA functional module is controlled to carry out uphill starting by described stabilizing control system (SCS) activation work.
Preferably, when starting or brake pedal are stepped on braking again smoothly, described HSA functional module quits work.
Slip in control method in described embodiment before, described stabilizing control system (SCS) gathers described ramp signal and vehicle speed signal from the brake actuator of vehicle, described stabilizing control system (SCS) gathers described brake pedal signal from the brake pedal apparatus of vehicle, and described stabilizing control system (SCS) at least gathers described gear signal from the gear box control unit (TCU) of vehicle.
Slip in control method in described embodiment before, described stabilizing control system (SCS) also gathers clutch state signal, output shaft rotation direction signal from the TCU of vehicle.
Slip in control method in described embodiment before, the moment of torsion that vehicle exports is gathered by control unit of engine (EMS) and is sent to described stabilizing control system (SCS).
Particularly, described uphill starting unsuccessfully refers at loosen the brake and described HSA functional module is activated in the predetermined amount of time of work, and vehicle does not overcome to the moment of torsion that wheel exports the reactive torque that the gravity of vehicle on ramp causes.
Alternatively, the scope of described predetermined amount of time is 1.5 seconds to 2 seconds.
According to the control method of slipping of further embodiment of this invention, wherein, in described wheel braking process, increase the brake-pressure of the brake equipment to wheel, until the speed of slipping of vehicle is less than or equal to maximum permission slip speed.
Alternatively, described maximum permission is slipped the scope of speed and is 1.6 to 10 kilometers/hour.
Preferably, when starting or brake pedal are stepped on braking again smoothly, described HRC functional module quits work.
Slip in control method in described any embodiment before, alternatively, described change speed gear box is the Automatic Transmission (AT) of double clutch gearbox (DCT) or other types.
Technique effect of the present invention is, of the present invention slip control method can vehicle because of misoperation or DCT overheating fault cause slip time, the vehicle speed of slipping is controlled, plays and alleviate or avoid because slipping the collision case caused, strengthen ramp driving safety.
Accompanying drawing explanation
From following detailed description by reference to the accompanying drawings, will make above and other object of the present invention and advantage more complete clear, wherein, same or analogous key element adopts identical label to represent.
Fig. 1 is the logic diagram slipping control method according to one embodiment of the invention.
Fig. 2 is the schematic flow sheet slipping control method according to one embodiment of the invention.
Detailed description of the invention
Introduce below be of the present invention multiple may some in embodiment, aim to provide basic understanding of the present invention, be not intended to confirm key of the present invention or conclusive key element or limit claimed scope.Easy understand, according to technical scheme of the present invention, do not changing under connotation of the present invention, one of ordinary skill in the art can propose other implementations that can mutually replace.Therefore, following detailed description of the invention and accompanying drawing are only the exemplary illustrations to technical scheme of the present invention, and should not be considered as of the present invention all or the restriction be considered as technical solution of the present invention or restriction.
Figure 1 shows that the logic diagram slipping control method according to one embodiment of the invention, Figure 2 shows that the schematic flow sheet slipping control method according to one embodiment of the invention.Below in conjunction with describing control method of slipping of the present invention shown in Fig. 1 and Fig. 2 in detail.
SCS has DSC function, namely it can pass through ramp signal, gear signal, wheel speed signal (also vehicle speed signal), brake pedal signal and output shaft rotation direction signal etc. and analyze driver intention and state of motion of vehicle, thus judge whether vehicle exists and slip phenomenon; Further, the operating mode that HRC functional module is only gone up a slope for vehicle forward works.Stabilizing control system (SCS) and EMS(control unit of engine), TCU(gear box control unit), brake pedal, Das Gaspedal, flow of information between braking execution architecture close and tie up to as clearly illustrated out in Fig. 1.Particularly, SCS module receives engine torque signal from EMS; DCT clutch engagement state, output shaft rotation direction and HRC facility request signal is received from TCU.Meanwhile, SCS reads wheel speed sensors, ramp sensor signal and brake pedal displacement transducer signal, judges vehicle running state and DCT super heat.
When overheating fault does not occur change speed gear box, TCU can not send the request of HRC function.When vehicle is stepped on brake pedal due to chaufeur and come to a complete stop on ramp (as shown in Figure 2 step S21), SCS system can gather brake pedal signal (such as brake pedal position signal, brake pedal status signal), ramp signal, gear signal and vehicle speed signal etc. (as shown in Figure 2 step S22).If above-mentioned signal satisfies condition (such as, meet that brake pedal is stepped on, the speed of a motor vehicle is that 0 exceedes certain hour, gear is D shelves, ramp value meets the conditions such as HSA operating range requirement), then SCS system can enter pre-HSA function (as shown in Figure 2 step S23).When chaufeur loosen the brake prepares starting (as shown in Figure 2 step S24), first SCS system activates HSA function (as shown in Figure 2 step S25), for chaufeur provides uphill starting to assist, guarantees that in 2 seconds, vehicle can not slip.In these 2 seconds, SCS system can judge state of motion of vehicle, if vehicle is started to walk smoothly (as shown in Figure 2 step S262) or chaufeur steps on brake pedal (as shown in Figure 2 step S261) again, then HSA function can normally exit (as shown in Figure 2 step S27), and vehicle continues to travel or continue to be parked in original place.If the moment of torsion that vehicle exports does not overcome the component (namely start to walk failure) of gravity and chaufeur does not step on brake pedal again, after 2 seconds, HSA function can exit (as shown in Figure 2 step S31) due to time-out.Now owing to not having enough moments of torsion to make vehicle travel on slope, vehicle can produce and slip, and SCS system can activate HRC function (as shown in Figure 2 step S31).Active boost can be carried out by braking execution architecture to the brake clamp of 4 wheels after HRC function activation, until vehicle reaches the maximum permission of having demarcated slip speed (as shown in Figure 2 step S33), this maximum permission slips speed generally in 1.6 ~ 10KPH(miles per hour) arrange in scope, specifically select sighting target stable condition and determine.In HRC working process, if vehicle is in the state of slipping always, HRC continuous firing causes the limit time that hardware allows.In HRC dead work or working process, stepping on brake pedal when chaufeur makes vehicle stop (as shown in Figure 2 step S341) or pedal of stepping on the throttle to produce (as shown in Figure 2 step S342) when enough large climbing moment of torsion makes vehicle upwards travel, and SCS system can exit HRC function (as shown in Figure 2 step S35).
During change speed gear box generation overheating fault, TCU direct case SCS system can send HRC function request (as shown in Figure 2 step S41), and SCS system acceptance directly can enter HRC readiness (as shown in Figure 2 step S41) after HRC request.No matter whether chaufeur first activates HSA function, as long as vehicle has the generation of slipping of violating driver intention, then SCS function on HRC function controls the speed of slipping, and prevents the accident of slipping.Wherein, the exit criteria of HRC function is that chaufeur is initiatively stopped and stopped (as shown in Figure 2 step S341).
Therefore; when vehicle-state meets default condition, or when overheating fault occurs DCT, SCS module slows down vehicle slip the object of speed by reaching the active boost of brake system; thus realize slipping protection, also can avoid because of upward slope driveaway operation improper caused slip fault.
It is to be appreciated that above embodiment schematically illustrates for DCT, those skilled in the art are according to above instruction and enlightenment, and the control method of slipping of above-described embodiment is equally applicable to the Automatic Transmission (AT) of change speed gear box other types.
Above example mainly describes control method of slipping of the present invention.Although be only described some of them embodiments of the present invention, those of ordinary skill in the art should understand, and the present invention can implement with other forms many not departing from its purport and scope.Therefore, the example shown and embodiment are regarded as illustrative and not restrictive, when do not depart from as appended each claim define the present invention spirit and scope, the present invention may contain various amendments and replacement.
Claims (12)
1. based on a control method of slipping for stabilizing control system (SCS), wherein, described stabilizing control system (SCS) has auxiliary (HSA) functional module of uphill starting; It is characterized in that, described stabilizing control system (SCS) also has ramp and slips control (HRC) functional module; Vehicle under upward slope working condition is in uphill starting process, at least meeting following two conditions a period of time, described stabilizing control system (SCS) makes described HSA functional module quit work and activates described HRC functional module to slip speed to prevent the speed of slipping of vehicle from exceeding maximum permission;
Wherein, described two conditions are:
Condition one, uphill starting is failed and brake pedal is not operated braking,
Condition two, change speed gear box generation overheating fault;
Wherein, the wheel braking initiatively to the described vehicle under upward slope working condition when described HRC functional module is activated.
2. control method of slipping as claimed in claim 1, is characterized in that, before judging whether to meet described two conditions, further comprising the steps of:
Determine that vehicle is in uphill starting state based on the ramp signal at least gathered, gear signal, vehicle speed signal, output shaft rotation direction and brake pedal signal; And
HSA functional module is controlled to carry out uphill starting by described stabilizing control system (SCS) activation work.
3. control method of slipping as claimed in claim 2, it is characterized in that, when starting or brake pedal are stepped on braking again smoothly, described HSA functional module quits work.
4. control method of slipping as claimed in claim 2, it is characterized in that, described stabilizing control system (SCS) gathers described ramp signal and vehicle speed signal from the brake actuator of vehicle, described stabilizing control system (SCS) gathers described brake pedal signal from the brake pedal apparatus of vehicle, and described stabilizing control system (SCS) at least gathers described gear signal from the gear box control unit (TCU) of vehicle.
5. control method of slipping as claimed in claim 2, is characterized in that, described stabilizing control system (SCS) also gathers clutch state signal, output shaft rotation direction signal from the TCU of vehicle.
6. control method of slipping as claimed in claim 2, it is characterized in that, the moment of torsion that vehicle exports is gathered by control unit of engine (EMS) and is sent to described stabilizing control system (SCS).
7. control method of slipping as claimed in claim 1, it is characterized in that, described uphill starting unsuccessfully refers at loosen the brake and described HSA functional module is activated in the predetermined amount of time of work, and vehicle does not overcome to the moment of torsion that wheel exports the reactive torque that the gravity of vehicle on ramp causes.
8. control method of slipping as claimed in claim 7, it is characterized in that, the scope of described predetermined amount of time is 1.5 seconds to 2 seconds.
9. slip as claimed in claim 1 control method, it is characterized in that, in described wheel braking process, increase the brake-pressure of the brake equipment to wheel, until the speed of slipping of vehicle is less than or equal to maximum permission slip speed.
10. slip as claimed in claim 9 control method, it is characterized in that, described maximum permission is slipped the scope of speed and is 1.6 to 10 kilometers/hour.
11. control methods of slipping as claimed in claim 9, it is characterized in that, when starting or brake pedal are stepped on braking again smoothly, described HRC functional module quits work.
12. slip control method according to any one of claim 1-11, and it is characterized in that, described change speed gear box is the Automatic Transmission (AT) of double clutch gearbox (DCT) or other types.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310531148.3A CN104590252B (en) | 2013-11-01 | 2013-11-01 | A kind of rollback control method based on stabilizing control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310531148.3A CN104590252B (en) | 2013-11-01 | 2013-11-01 | A kind of rollback control method based on stabilizing control system |
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| CN104590252A true CN104590252A (en) | 2015-05-06 |
| CN104590252B CN104590252B (en) | 2018-09-04 |
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| CN201310531148.3A Active CN104590252B (en) | 2013-11-01 | 2013-11-01 | A kind of rollback control method based on stabilizing control system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106335511A (en) * | 2015-07-07 | 2017-01-18 | 现代自动车株式会社 | Method for preventing overheating of clutch for vehicle |
| CN107054369A (en) * | 2015-10-21 | 2017-08-18 | 福特全球技术公司 | The automatic start/stop system of the improved motor vehicles with stick transmission |
| CN108657181A (en) * | 2017-03-27 | 2018-10-16 | 福特全球技术公司 | Vehicle idling and starting control |
| CN111683844A (en) * | 2017-12-29 | 2020-09-18 | Zf主动安全美国股份公司 | Traction controlled rollback mitigation on asymmetric coefficient of friction ramps |
| CN111720541A (en) * | 2019-03-20 | 2020-09-29 | 上海汽车集团股份有限公司 | Method for acquiring rotation direction of input shaft of double-clutch transmission and related device |
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| CN107054369A (en) * | 2015-10-21 | 2017-08-18 | 福特全球技术公司 | The automatic start/stop system of the improved motor vehicles with stick transmission |
| CN107054369B (en) * | 2015-10-21 | 2021-07-09 | 福特全球技术公司 | Improved automatic start/stop system for motor vehicle with manual transmission |
| CN108657181A (en) * | 2017-03-27 | 2018-10-16 | 福特全球技术公司 | Vehicle idling and starting control |
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| CN111683844A (en) * | 2017-12-29 | 2020-09-18 | Zf主动安全美国股份公司 | Traction controlled rollback mitigation on asymmetric coefficient of friction ramps |
| CN111683844B (en) * | 2017-12-29 | 2023-06-23 | Zf主动安全美国股份公司 | Traction control rollback mitigation on asymmetric coefficient of friction ramps |
| CN111720541A (en) * | 2019-03-20 | 2020-09-29 | 上海汽车集团股份有限公司 | Method for acquiring rotation direction of input shaft of double-clutch transmission and related device |
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| CN104590252B (en) | 2018-09-04 |
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