CN114537396A - Self-adaptive control method and system for ramp auxiliary function of automatic-transmission commercial vehicle - Google Patents

Self-adaptive control method and system for ramp auxiliary function of automatic-transmission commercial vehicle Download PDF

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Publication number
CN114537396A
CN114537396A CN202210261520.2A CN202210261520A CN114537396A CN 114537396 A CN114537396 A CN 114537396A CN 202210261520 A CN202210261520 A CN 202210261520A CN 114537396 A CN114537396 A CN 114537396A
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China
Prior art keywords
vehicle
ramp
preset
automatic transmission
adaptive
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Pending
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CN202210261520.2A
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Chinese (zh)
Inventor
高启明
陈传增
魏天奇
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Anhui Jianghuai Automobile Group Corp
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Anhui Jianghuai Automobile Group Corp
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Priority to CN202210261520.2A priority Critical patent/CN114537396A/en
Publication of CN114537396A publication Critical patent/CN114537396A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18027—Drive off, accelerating from standstill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/10—Change speed gearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/10—Accelerator pedal position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2552/00—Input parameters relating to infrastructure
    • B60W2552/15—Road slope, i.e. the inclination of a road segment in the longitudinal direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)
  • Control Of Transmission Device (AREA)

Abstract

The invention discloses a self-adaptive control method and a self-adaptive control system for a hill auxiliary function of an automatic-gear commercial vehicle.

Description

Self-adaptive control method and system for ramp auxiliary function of automatic-transmission commercial vehicle
Technical Field
The invention relates to the technical field of control of commercial vehicles, in particular to a self-adaptive control method and system for a ramp auxiliary function of an automatic-transmission commercial vehicle.
Background
When the vehicle is stopped and started on a slope road, if a driver is not operated properly, the vehicle is easy to slide, especially in the application scene of a heavy commercial vehicle, the potential safety hazard risk of the vehicle under the full load condition is higher, and therefore the current commercial vehicle is mostly popularized with a slope auxiliary function.
Along with the application of the automatic gear AMT product of the commercial vehicle, the whole vehicle is intelligently upgraded, most automatic gear commercial vehicles continue the hill start mode of the traditional manual gear vehicle, no special hill start self-adaptive coping mechanism is added, most of the existing commercial vehicle hill auxiliary functions are manually controlled to be opened, activated and quit and closed, in practical use, the manual operation is relatively complicated, and the corresponding functions are basically realized by controlling the braking time, for example, when the vehicle is parked on a hill, a driver firstly ignites to start an engine, then presses down a hill start switch and closes a manual valve, so that compressed air from an air storage cylinder reaches a two-position three-way electromagnetic valve, then a gearbox controller sends a received engine signal, a hill start signal, a braking signal and a start state signal to a hill start controller, and the hill start controller calculates the current hill resistance to be overcome according to the longitudinal dynamics of the vehicle, and sending a command to electrify the two-position three-way electromagnetic valve so as to convert the vehicle from service braking to slope auxiliary braking.
The mode still needs the activation and the closing of the ramp auxiliary function to be judged and operated by people, and because the slope can not be calculated in real time, the magnitude of the required traction force can not be accurately judged, the closing time of the ramp auxiliary function can not be accurately judged, the convenience is poor, the intellectualization is not enough, the mode is similar to the traditional manual gear operation mode, the purpose of simplifying the operation is not achieved, so that part of users can avoid using the ramp auxiliary function, and the effect on the safety and the service life of the clutch of the whole vehicle is greatly influenced.
Disclosure of Invention
In view of the above, the present invention aims to provide an adaptive control method and system for a hill hold function of an automatic transmission commercial vehicle, so as to solve the problem of inconvenient operation of the existing hill hold function.
The technical scheme adopted by the invention is as follows:
in a first aspect, a method for adaptive control of hill hold function for a motor vehicle includes:
detecting the actual working environment in real time after the vehicle is ignited; the actual working environment comprises a vehicle speed, a road surface gradient, a pedal state, gear information and a ramp auxiliary function state;
judging whether a first preset condition for automatically opening the ramp auxiliary function and a second preset condition for closing the ramp auxiliary function in advance are met or not according to the actual working environment and the working condition of the automatic gearbox, and sending a corresponding control instruction;
and triggering the execution module to be opened or closed according to the control instruction so as to activate or quit the ramp auxiliary function.
In at least one possible implementation manner, the first preset condition at least includes the following: the vehicle speed is zero, the brake pedal is stepped on, the vehicle is in a non-neutral state, and the road gradient is greater than a preset gradient threshold value.
In at least one possible implementation manner, the second preset condition at least includes the following: the brake and the accelerator are not stepped on and exceed the preset duration, the rotating speed of the output shaft of the gearbox is higher than the preset rotating speed value, and the torque of the input shaft of the gearbox is higher than the preset torque value.
In at least one possible implementation manner, the preset rotating speed value and the preset torque value are calibrated and calculated by the automatic transmission control system according to the load weight of the whole vehicle, so that the traction force exceeds the preset proportion of the component force of the gravity of the vehicle in the gradient direction.
In a second aspect, a hill hold function adaptive control system for a utility vehicle includes:
the environment sensing module is used for detecting the actual working environment in real time after the vehicle is ignited; the actual working environment comprises a vehicle speed, a road surface gradient, a pedal state, gear information and a ramp auxiliary function state;
the decision calculation module is used for judging whether a first preset condition for automatically opening the ramp auxiliary function and a second preset condition for closing the ramp auxiliary function in advance are met or not according to the actual working environment and the working condition of the automatic gearbox, and sending a corresponding control instruction;
and the control module is used for triggering the execution module to be opened or closed according to the control instruction so as to realize the activation or exit of the ramp auxiliary function, and the execution module comprises an electric control brake.
In at least one possible implementation, the context awareness module includes:
at least one of a vehicle speed sensor, a wheel speed sensor and a vehicle data recorder for sensing the vehicle speed;
at least one of a gradient sensor for sensing a gradient of a road surface;
at least one of an accelerator pedal and a brake pedal travel sensor for sensing a pedal state;
at least one gear sensor for sensing gear information; and the number of the first and second groups,
at least one of a ramp assist function physical switch or a virtual switch for sensing a state of the ramp assist function.
In at least one possible implementation thereof, the grade sensor is integrated within the automatic transmission.
In at least one possible implementation manner, the decision calculation module at least includes one of the following: independent controller, engine ECU, derailleur TCU.
In at least one possible implementation manner, the control module includes: an anti-lock braking system or an electronic braking system.
In at least one possible implementation thereof, the electrically controlled brake is an electrically controlled pneumatic brake.
The main design concept of the invention is that whether the hill auxiliary function is activated or quitted is automatically identified by reading the current vehicle speed information, the gradient information, the accelerator brake pedal information, the transmission gear information and the working condition information of the hill auxiliary function, the activation or the release of the hill auxiliary function is not required to be judged manually in consideration of different load weight conditions, and manual operation (such as opening a hill auxiliary switch) is not required, the vehicle can be started and driven normally after ignition, the hill auxiliary function can be activated and quitted in a self-adaptive manner, and the defect that the hill auxiliary function is activated on a flat road is avoided, so that the invention is more suitable for practical use, and the flat road is started more smoothly, and is more intelligent, accurate and comfortable.
Furthermore, the invention CAN be established on the basis of the CAN communication of the whole vehicle, and CAN obtain information such as the position of the brake pedal in real time through electric signals, so that the response is timely and accurate, and the control delay is effectively avoided; in addition, mature technologies such as EBS/ABS and the like which are popularized in commercial vehicles are utilized, and the purposes of quicker response of activation and closing of the brake of the whole vehicle, more convenient system application and stronger operability are achieved.
Further, the present invention allows and preferably integrates a grade sensor inside the transmission, which is more advantageous in space saving and protection of the grade sensor than in the case where the grade angle sensor is required to be mounted independently on the vehicle body or the chassis.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings, in which:
FIG. 1 is a flow chart of an adaptive control method for a hill hold function of an automatic transmission commercial vehicle according to an embodiment of the present invention;
fig. 2 is a block diagram of an adaptive control system for a hill hold function of an automatic transmission commercial vehicle according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
The method and the system related by the invention can be embodied by the following comprehensive scheme which is shown in the combination of the figure 1 and the figure 2:
the environment perception module: after the vehicle is ignited, detecting the actual working environment in real time, wherein the actual working environment comprises the vehicle speed (which can relate to at least one of a vehicle speed sensor, a wheel speed sensor and a driving recorder), the road surface gradient (which can relate to a gradient sensor: the sensor is used for identifying the inclined angle of the road, and in the actual operation, the sensor can be integrated into a transmission), the pedal state (which can relate to an accelerator pedal and a brake pedal stroke sensor and a brake oil pressure sensor), the gear information (which can relate to a gear sensor), the ramp auxiliary function state (which can relate to a ramp auxiliary function physical switch or a virtual switch and ABS/EBS) and the like;
decision calculation module (controller, which may be a stand-alone controller in actual operation, or an engine ECU or a transmission TCU): judging whether a first preset condition for automatically opening the ramp auxiliary function and a second preset condition for closing the ramp auxiliary function in advance are met or not according to the actual working environment and the working condition of the automatic gearbox, and sending a corresponding control instruction;
specifically, the first preset condition includes at least the following: the vehicle speed is zero, the brake pedal is stepped on, the vehicle is in a non-neutral state, and the road gradient is greater than a preset gradient threshold value.
The second preset condition includes at least the following: neither the brake nor the accelerator is depressed for more than a predetermined period of time (e.g., 3 seconds), the speed of the transmission output shaft is greater than a predetermined speed value (e.g., 100rpm), and the torque of the transmission input shaft is greater than a predetermined torque value (e.g., 200 Nm). Based on this, it can also be pointed out that, regarding the preset rotating speed value and the preset torque value of the gearbox, in the actual operation, the calibration calculation can be performed by the automatic gearbox control system according to the load mass of the whole vehicle, that is, the set value only needs to satisfy the preset proportion that the traction force exceeds the component force of gravity in the gradient direction.
Continuing before, finally, the control module (anti-lock braking system or electronic braking system, ABS/EBS): and triggering an execution module (a brake, and the commercial vehicle mostly adopts an electric control air brake) to be started or closed according to the control instruction so as to realize the activation or quit of the ramp auxiliary function.
In addition, on the basis of the foregoing embodiments, further examples may further include:
the ramp auxiliary Switch can provide a Hill Hold Switch signal (a Switch state signal), wherein 0 represents that the Switch is closed, and 1 represents that the Switch is opened;
the ABS/EBS can provide a Hill Holder Mode signal (working Mode signal), wherein 0 represents that the ramp auxiliary function is closed, and 1 represents that the ramp auxiliary function is opened;
the ECU \ TCU provides a Ready for Brake Release signal (a preset condition judgment result signal), wherein 0 represents that the condition is met, and 1 represents that the condition is not met.
Therefore, the implementation reference of the working process of the adaptive control system of the hill-hold function is provided as follows: when the commercial vehicle is in a slope stopping state (assuming that the gradient is larger than a set value), a driver steps on a Brake and releases the hand Brake, and at the moment, the state of a Ready for Brake Release signal provided by a Transmission Case Unit (TCU) is changed from 1 to 0; and detecting that the state of the Hill Hold Switch is 1 (i.e. recognizing that the Switch is turned on), after the ABS/EBS receives Ready for Brake Release 0, the state of the Hill Holder Mode signal is changed from initial 0 to 1, at this time, the ABS/EBS activates the Brake of the whole vehicle, and the vehicle is automatically braked and stopped to be locked so as to prevent the vehicle from rolling.
Then, if the driver releases the Brake and does not step on the accelerator, the state is changed from 0 to 1 after keeping the state for 3 s; or if the driver steps on the accelerator after releasing the Brake, the rotating speed and the torque of the output shaft of the gearbox of the vehicle are higher than the set values (the time is less than 3s), and the Ready for Brake Release is changed from 0 to 1.
After the ABS/EBS receives the Ready for Brake Release is 1, the state of the Hill Holder Mode is changed from 1 to 0, and the ABS/EBS closes the vehicle Brake, so that the vehicle can normally run.
In summary, the main design concept of the present invention is to automatically identify whether to activate or withdraw the hill hold function by reading current vehicle speed information, gradient information, accelerator brake pedal information, transmission gear information, and working condition information of the hill hold function, and the vehicle can be started and driven normally after ignition without human judgment, activation or release, or manual operation (for example, turning on a hill hold switch) in consideration of different load weight conditions, and the hill hold function can be activated and withdrawn adaptively, and the disadvantage that the hill hold function is activated is avoided, so that the present invention is more suitable for practical use, and the hill start is smoother, and more intelligent, precise, and comfortable.
In the embodiments of the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and may mean that a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c may represent: a, b, c, a and b, a and c, b and c or a and b and c, wherein a, b and c can be single or multiple.
The structure, features and effects of the present invention have been described in detail with reference to the embodiments shown in the drawings, but the above embodiments are merely preferred embodiments of the present invention, and it should be understood that technical features related to the above embodiments and preferred modes thereof can be reasonably combined and configured into various equivalent schemes by those skilled in the art without departing from and changing the design idea and technical effects of the present invention; therefore, the invention is not limited to the embodiments shown in the drawings, and all the modifications and equivalent embodiments that can be made according to the idea of the invention are within the scope of the invention as long as they are not beyond the spirit of the description and the drawings.

Claims (10)

1. A method for adaptive control of the hill hold function for a motor vehicle, comprising:
detecting the actual working environment in real time after the vehicle is ignited; the actual working environment comprises a vehicle speed, a road surface gradient, a pedal state, gear information and a ramp auxiliary function state;
judging whether a first preset condition for automatically opening the ramp auxiliary function and a second preset condition for closing the ramp auxiliary function in advance are met or not according to the actual working environment and the working condition of the automatic gearbox, and sending a corresponding control instruction;
and triggering the execution module to be switched on or switched off according to the control instruction so as to activate or quit the ramp auxiliary function.
2. The adaptive control method of hill hold functions for a commercial automatic transmission vehicle according to claim 1, characterized in that said first preset conditions comprise at least the following: the vehicle speed is zero, the brake pedal is stepped on, the vehicle is in a non-neutral state, and the road gradient is greater than a preset gradient threshold value.
3. The adaptive control method for a hill assist function for a commercial automatic transmission vehicle according to claim 1, wherein the second preset condition includes at least the following: the brake and the accelerator are not stepped on and exceed the preset duration, the rotating speed of the output shaft of the gearbox is higher than the preset rotating speed value, and the torque of the input shaft of the gearbox is higher than the preset torque value.
4. The adaptive ramp assist function control method for an automatic-transmission commercial vehicle according to claim 3, wherein the preset rotating speed value and the preset torque value are calibrated and calculated by an automatic transmission control system according to the load mass of the whole vehicle, so that the traction force exceeds a preset proportion of the component force of the gravity of the vehicle in the gradient direction.
5. A hill hold function adaptive control system for an automatic transmission commercial vehicle, comprising:
the environment sensing module is used for detecting the actual working environment in real time after the vehicle is ignited; the actual working environment comprises a vehicle speed, a road surface gradient, a pedal state, gear information and a ramp auxiliary function state;
the decision calculation module is used for judging whether a first preset condition for automatically opening the ramp auxiliary function and a second preset condition for closing the ramp auxiliary function in advance are met or not according to the actual working environment and the working condition of the automatic gearbox, and sending a corresponding control instruction;
and the control module is used for triggering the execution module to be opened or closed according to the control instruction so as to realize the activation or exit of the ramp auxiliary function, and the execution module comprises an electric control brake.
6. The adaptive ramp assist function control system for a commercial automatic transmission vehicle of claim 5, wherein the environment sensing module comprises:
at least one of a vehicle speed sensor, a wheel speed sensor and a vehicle data recorder for sensing the vehicle speed;
at least one of a gradient sensor for sensing a gradient of a road surface;
at least one of an accelerator pedal and a brake pedal travel sensor for sensing a pedal state;
at least one gear sensor for sensing gear information; and the number of the first and second groups,
at least one of a ramp assist function physical switch or a virtual switch for sensing a state of the ramp assist function.
7. The adaptive ramp assist function control system for an automatic transmission commercial vehicle of claim 6 wherein the grade sensor is integrated into an automatic transmission.
8. The adaptive ramp assist function control system for a commercial automatic transmission vehicle according to claim 5, wherein the decision making module comprises at least one of: independent controller, engine ECU, derailleur TCU.
9. The adaptive ramp assist function control system for a commercial automatic transmission vehicle of claim 5, wherein the control module comprises: an anti-lock braking system or an electronic braking system.
10. The adaptive ramp assist function control system for an automatic transmission commercial vehicle according to any one of claims 5 to 9, wherein the electrically controlled brake is an electrically controlled pneumatic brake.
CN202210261520.2A 2022-03-16 2022-03-16 Self-adaptive control method and system for ramp auxiliary function of automatic-transmission commercial vehicle Pending CN114537396A (en)

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CN202210261520.2A CN114537396A (en) 2022-03-16 2022-03-16 Self-adaptive control method and system for ramp auxiliary function of automatic-transmission commercial vehicle

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115289216A (en) * 2022-07-26 2022-11-04 中汽创智科技有限公司 Control method and control system for improving climbing capability of stepless automatic gearbox
CN115716456A (en) * 2022-11-29 2023-02-28 陕西法士特齿轮有限责任公司 System and method for activating self-learning function of AMT (automated mechanical transmission) gradient sensor of commercial vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115289216A (en) * 2022-07-26 2022-11-04 中汽创智科技有限公司 Control method and control system for improving climbing capability of stepless automatic gearbox
CN115716456A (en) * 2022-11-29 2023-02-28 陕西法士特齿轮有限责任公司 System and method for activating self-learning function of AMT (automated mechanical transmission) gradient sensor of commercial vehicle

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