CN116461529B - Vermicular starting control method, device, equipment and computer readable storage medium - Google Patents

Vermicular starting control method, device, equipment and computer readable storage medium Download PDF

Info

Publication number
CN116461529B
CN116461529B CN202310721528.7A CN202310721528A CN116461529B CN 116461529 B CN116461529 B CN 116461529B CN 202310721528 A CN202310721528 A CN 202310721528A CN 116461529 B CN116461529 B CN 116461529B
Authority
CN
China
Prior art keywords
braking
vehicle
pressure
creep
braking system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202310721528.7A
Other languages
Chinese (zh)
Other versions
CN116461529A (en
Inventor
李文军
刘强
程云江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shengrui Transmission Co Ltd
Original Assignee
Shengrui Transmission Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shengrui Transmission Co Ltd filed Critical Shengrui Transmission Co Ltd
Priority to CN202310721528.7A priority Critical patent/CN116461529B/en
Publication of CN116461529A publication Critical patent/CN116461529A/en
Application granted granted Critical
Publication of CN116461529B publication Critical patent/CN116461529B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/18—Conjoint control of vehicle sub-units of different type or different function including control of braking systems
    • B60W10/182—Conjoint control of vehicle sub-units of different type or different function including control of braking systems including control of parking brakes
    • 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
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/15—Control strategies specially adapted for achieving a particular effect
    • 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
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/50—Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
    • 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
    • B60W30/18063—Creeping
    • 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
    • B60W2510/18—Braking system
    • B60W2510/186—Status of parking brakes
    • 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/08—Electric propulsion units
    • B60W2710/083—Torque
    • 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/18—Braking system
    • B60W2710/182—Brake pressure, e.g. of fluid or between pad and disc
    • 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
    • Y02T10/62—Hybrid vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Automation & Control Theory (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

The present disclosure relates to a creep start control method, apparatus, device, and computer-readable storage medium, the method comprising: after the engine of the vehicle is started, detecting whether the braking state of the vehicle can be released within a first preset time; if the braking state of the vehicle cannot be released within the first preset time, opening the torque transmission clutch, and simultaneously supplementing the braking pressure for the braking system to meet the starting requirement of the vehicle; and responding to the starting operation of a user, keeping the running clutch in a pressed state, controlling the creep torque of the vehicle motor to be increased according to a preset step length, and continuing to supplement the braking pressure for the braking system until the creep torque reaches the target torque of the creep starting of the vehicle. According to the control method and the control device, the braking pressure is supplemented for the braking system in advance, so that braking failure caused by insufficient braking pressure is overcome, the effect of creeping starting is improved, the rationality of creeping starting control logic is improved, and riding experience of a user is optimized.

Description

Vermicular starting control method, device, equipment and computer readable storage medium
Technical Field
The present disclosure relates to the field of vehicle technologies, and in particular, to a creep start control method, a device, equipment, and a computer readable storage medium.
Background
At present, the vehicle technology in China is quite rapid in development in the direction of new energy sources such as hybrid power, pure electric power and the like, the technology is gradually mature, the new energy source technology for saving oil and energy is greatly developed, and each vehicle enterprise and each supplier are also competing for new energy source products in various technical routes.
When the vehicle is just started, a period of creeping start process exists. At present, a hybrid electric vehicle needs to adopt clutch sliding friction to control creeping starting, when a brake failure occurs, the situation of creeping starting response retardation can occur, on one hand, poor riding experience is caused for a user, on the other hand, the clutch is in a sliding friction state for a long time, so that the clutch is high in temperature, and in severe cases, the clutch is worn and failed. Therefore, the control of creep start in the prior art is poor.
Disclosure of Invention
In order to solve the technical problems, the present disclosure provides a creep start control method, a device, equipment and a computer readable storage medium, so as to improve the control rationality of creep start.
In a first aspect, an embodiment of the present disclosure provides a creep start control method, including:
after the engine of the vehicle is started, detecting whether the braking state of the vehicle can be released within a first preset time;
if the braking state of the vehicle cannot be released within the first preset time, opening the torque transmission clutch, and simultaneously supplementing the braking pressure for the braking system to meet the starting requirement of the vehicle;
and responding to the starting operation of a user, keeping the running clutch in a pressed state, controlling the creep torque of the vehicle motor to be increased according to a preset step length, and continuing to supplement the braking pressure for the braking system until the creep torque reaches the target torque of the creep starting of the vehicle.
In some embodiments, the detecting whether the braking state of the vehicle can be released within a first preset time includes:
acquiring air pressure of a braking system and oil pressure of the braking system;
if the air pressure of the braking system is greater than a first preset threshold value or the oil pressure of the braking system is greater than a second preset threshold value, determining that the braking state of the vehicle can be relieved within the first preset time;
if the air pressure of the braking system is smaller than or equal to a first preset threshold value and the oil pressure of the braking system is smaller than or equal to a second preset threshold value, determining that the braking state of the vehicle cannot be relieved within the first preset time.
In some embodiments, the supplementing the braking system with braking pressure comprises:
controlling the rotating speed of the engine to reach a target rotating speed within a second preset time, and supplementing braking pressure for the braking system; and/or
And controlling the high-voltage electric pump to supplement the braking pressure for the braking system.
In some embodiments, the method further comprises, before the controlling the rotational speed of the engine reaches the target rotational speed within the second preset time to supplement the braking pressure for the braking system:
acquiring a corresponding relation between the rotating speed of an engine and the braking pressure;
and determining the target rotating speed of the engine according to the braking pressure and the corresponding relation.
In some embodiments, the controlling the engine to increase the speed until the target speed is reached, supplementing the braking system with braking pressure, comprises:
according to the available electric quantity of the vehicle power battery, the operation parameters of the engine are adjusted through a generator, so that the operation parameters are kept in a preset high-efficiency working interval;
the electrical energy generated by the generator is stored in the power cell.
In some embodiments, the operating parameters of the engine include at least one or more of the following:
the rotational speed of the engine, the power of the engine, the torque of the generator.
In some embodiments, the method further comprises:
judging whether the vehicle starts creeping and starting in a third preset time;
if not, the running clutch is controlled to keep a pressed state, and the braking pressure is continuously supplemented for the braking system until the vehicle overcomes the braking resistance and starts to creep.
In a second aspect, an embodiment of the present disclosure provides a creep start control device, including:
the detection module is used for detecting whether the braking state of the vehicle can be released within a first preset time after the engine of the vehicle is started;
the supplementing module is used for opening the torque transmission clutch and supplementing the braking pressure for the braking system at the same time so as to meet the starting requirement of the vehicle if the braking state of the vehicle cannot be relieved within the first preset time;
the control module is used for responding to the starting operation of a user, keeping the running clutch in a pressed state, controlling the creep torque of the vehicle motor to be increased according to a preset step length, and continuing to supplement the braking pressure for the braking system until the creep torque reaches the target torque of the creep starting of the vehicle.
In a third aspect, an embodiment of the present disclosure provides an electronic device, including:
a memory;
a processor; and
a computer program;
wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method according to the first aspect.
In a fourth aspect, embodiments of the present disclosure provide a computer-readable storage medium having stored thereon a computer program for execution by a processor to implement the method of the first aspect.
In a fifth aspect, the presently disclosed embodiments also provide a computer program product comprising a computer program or instructions which, when executed by a processor, implement a creep start control method as described above.
According to the creep start control method, device and equipment and the computer readable storage medium, braking pressure is supplemented to the braking system in advance, braking failure caused by insufficient braking pressure is overcome, the creep start effect is improved, the rationality of the creep start control logic is improved, and riding experience of a user is optimized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic illustration of an application scenario of a P2 single motor hybrid system;
FIG. 2 is a flow chart of a creep start control method provided by an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of the connection of a high-voltage pump of a P2 single-motor hybrid power system;
fig. 4 is a schematic structural diagram of a P2.5 single-motor hybrid system according to an embodiment of the disclosure;
fig. 5 is a schematic structural diagram of a dual-motor hybrid power system according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a creep start control device according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.
Fig. 1 is a schematic diagram of an application scenario of a P2 single motor hybrid system. As shown in fig. 1, the P2 structure is that a set of motor and two clutches are added between the engine and the transmission based on the original power assembly to realize the mixing. This scenario includes an engine 1, a drive motor 2, a C0 clutch (torque transmission clutch) 3, a transmission mechanism 4, wheels 5, a speed reducer 6, and a C1 clutch (travel clutch) 7. In the creep starting process, the motor 2 is used as a driving unit, the C1 clutch 7 is in a sliding friction state, and the vehicle starts to have a vehicle speed when the transmission torque of the C0 clutch 3 is gradually increased to a critical point according to a certain step length. When the vehicle is in a braking failure (auxiliary braking is insufficient to completely release the braking force) due to a long-time parking or the like, the C1 clutch 7 is in a slip state for a long time, torque is insufficient to overcome braking resistance, and the vehicle is always in a stationary state. If the C1 clutch 7 is in a sliding state for a long time, the temperature of the C1 clutch 7 is too high, the abrasion of the clutch is aggravated to influence the service life of parts, the abrasion failure is directly caused under severe conditions, and the situation that the vehicle cannot be started in time also causes poor experience of a driver or a rider.
In view of this problem, embodiments of the present disclosure provide a creep start control method, which is described below with reference to specific embodiments.
Fig. 2 is a flowchart of a creep start control method according to an embodiment of the present disclosure. The method can be applied to the application scenario shown in fig. 1, which includes an engine 1, a drive motor 2, a C0 clutch (torque transfer clutch) 3, a transmission mechanism 4, wheels 5, a speed reducer 6, and a C1 clutch (travel clutch) 7.
It can be appreciated that the creep start control method provided by the embodiment of the disclosure may also be applied in other scenarios.
The following describes the creep start control method shown in fig. 2 in combination with the application scenario shown in fig. 1, and the method comprises the following specific steps:
s201, after the engine of the vehicle is started, whether the braking state of the vehicle can be released within a first preset time is detected.
After the whole vehicle is ignited and the engine is started, the vehicle is still in a braking state, firstly, various parameters in a vehicle braking system are obtained, and whether the braking state of the vehicle can be released in time within a first preset time is judged if a driver needs to start. The first preset time may be any time preset.
In some embodiments, the first preset time may be a short time, such as 1 second, 2 seconds, etc., to ensure that the vehicle is able to start in time.
In some embodiments, the parameters in the vehicle braking system include at least air pressure of the braking system.
If the air pressure of the braking system is smaller than or equal to the first preset threshold value, the braking pressure of the vehicle braking system is considered to be insufficient at the moment, so that the torque provided by the motor 2 is insufficient to overcome the braking resistance, and the braking state of the vehicle cannot be released in time. If the vehicle starts directly at this time, the C1 clutch 7 is in a slip state for a long time.
Correspondingly, if the air pressure of the braking system is larger than the first preset threshold value, the braking pressure of the vehicle braking system is considered to be enough to enable the torque provided by the motor 2 to overcome the braking resistance, so that the braking state of the vehicle can be released in time, and the creep starting stage can be directly carried out at the moment.
S202, if the braking state of the vehicle cannot be released within the first preset time, opening the torque transmission clutch, and simultaneously supplementing the braking pressure for the braking system to meet the starting requirement of the vehicle.
If the fact that the braking state of the vehicle cannot be released in time within the first preset time is detected, it is determined that the braking pressure of the braking system is insufficient at the moment, the torque transmission clutch is disconnected at the moment, the braking pressure is supplemented to the braking system in advance before a user starts, and the braking pressure of the braking system can meet the requirement of releasing the braking state of the vehicle within the first preset time so as to meet the starting requirement of the vehicle in advance.
In some embodiments, if the air pressure of the braking system is less than or equal to the first preset threshold, at this time, the braking state of the vehicle cannot be released within the first preset time, the C0 clutch (torque transfer clutch) 3 is disconnected, and the engine 1 increases the rotational speed to supplement the braking pressure for the braking system, so as to satisfy the braking requirement of the vehicle in advance, so that the braking state of the vehicle can be released within the first preset time, and meanwhile, the starting requirement of the vehicle is satisfied.
And S203, responding to starting operation of a user, keeping a running clutch in a pressed state, controlling the creep torque of a vehicle motor to be increased according to a preset step length, and continuing to supplement the braking pressure for a braking system until the creep torque reaches the target torque of the creep starting of the vehicle.
When a user (driver) makes a starting operation, the running clutch keeps a pressed state, namely the C1 clutch (running clutch) 7 is completely pressed, the creep torque of the control motor 2 is gradually increased according to a preset step length until the power provided by the creep torque of the motor 2 can overcome the braking resistance of the vehicle and enters a creep starting state.
Specifically, when the creep torque of the motor reaches the target torque, the vehicle enters a creep starting state, wherein the power provided by the target torque is greater than the braking resistance.
In some embodiments, during the gradual increase of the creep torque of the control motor 2 according to the preset step, the control C0 clutch (torque transfer clutch) 3 is kept in an open state, avoiding an excessive load of the C0 clutch (torque transfer clutch) 3.
In some embodiments, in the process of gradually increasing the creep torque of the control motor 2 according to the preset step, the rotating speed of the engine 1 is increased to supplement the braking pressure for the braking system, so that the creep start failure caused by the insufficient pressure of the braking system is further relieved.
According to the embodiment of the disclosure, after the engine of the vehicle is started, whether the braking state of the vehicle can be relieved within a first preset time or not is detected; if the braking state of the vehicle cannot be released within the first preset time, opening the torque transmission clutch, and simultaneously supplementing the braking pressure for the braking system to meet the starting requirement of the vehicle; in response to starting operation of a user, the running clutch keeps a pressing state, creep torque of a vehicle motor is controlled to be increased according to a preset step length, and braking pressure is continuously supplemented to a braking system until the creep torque reaches a target torque for creep starting of the vehicle, braking failure caused by insufficient braking pressure is overcome by supplementing the braking pressure to the braking system in advance, the creep starting effect is improved, the rationality of creep starting control logic is improved, and riding experience of the user is optimized.
On the basis of the above embodiment, the detecting whether the braking state of the vehicle can be released within a first preset time includes: acquiring air pressure of a braking system and oil pressure of the braking system; if the air pressure of the braking system is greater than a first preset threshold value or the oil pressure of the braking system is greater than a second preset threshold value, determining that the braking state of the vehicle can be relieved within the first preset time; if the air pressure of the braking system is smaller than or equal to a first preset threshold value and the oil pressure of the braking system is smaller than or equal to a second preset threshold value, determining that the braking state of the vehicle cannot be relieved within the first preset time.
In the hybrid system, the braking pressure of the braking system includes air pressure and oil pressure, and when the air pressure or the oil pressure is insufficient, the braking pressure of the braking system is insufficient, which may cause the vehicle to fail to completely release the braking state.
Specifically, a critical value is set for the air pressure and the oil pressure respectively, and when the air pressure or the oil pressure is greater than the critical value, enough braking pressure can be provided for the braking system. That is, if the air pressure of the brake system is greater than a first preset threshold value or the oil pressure of the brake system is greater than a second preset threshold value, it is determined that the brake pressure of the brake system is sufficient, and the braking state of the vehicle can be released within the first preset time.
Correspondingly, if the air pressure of the braking system is smaller than or equal to a first preset threshold value and the oil pressure of the braking system is smaller than or equal to a second preset threshold value, the braking pressure of the braking system is determined to be insufficient, and the braking state of the vehicle cannot be released within the first preset time.
Further, when the braking pressure of the braking system is insufficient and the braking state of the vehicle cannot be released within the first preset time, supplementing the braking pressure to the braking system includes: controlling the rotating speed of the engine to reach a target rotating speed within a second preset time, and supplementing braking pressure for the braking system; and/or controlling a high-voltage electric pump to supplement the braking pressure for the braking system.
Specifically, the method further includes, before the rotational speed of the control engine reaches the target rotational speed within the second preset time and the braking pressure is supplemented to the braking system: acquiring a corresponding relation between the rotating speed of an engine and the braking pressure; and determining the target rotating speed of the engine according to the braking pressure and the corresponding relation.
And setting a corresponding relation between the engine speed and the braking pressure in the vehicle in advance, and representing the engine speed required by the braking pressure of the current braking system to complement the braking pressure meeting the starting requirement. And according to the braking pressure of the braking system at a certain moment, searching the corresponding engine speed in the corresponding relation between the engine speed and the braking pressure as the target speed of the engine.
In some embodiments, the engine speed versus brake pressure is shown in the following table:
TABLE 1 Engine speed vs. barometric/Hydraulic correspondence
It is understood that the values in the above table are only examples.
When a shortage of brake system air pressure or hydraulic pressure is detected, the C0 clutch (torque transfer clutch) 3 is disengaged, and the engine lookup table determines a target rotational speed and increases to the target rotational speed to complement the brake pressure required by the brake system.
Fig. 3 is a schematic structural diagram of a connection of a high-voltage pump of a P2 single-motor hybrid power system. As shown in fig. 3, the two-motor hybrid system includes an engine 1, a drive motor 2, a C0 clutch (torque transmission clutch) 3, a transmission mechanism 4, wheels 5, a speed reducer 6, and a C1 clutch (running clutch) 7, as well as a generator 8, a high-voltage electric pump 9, a power battery 10, and a high-voltage line 11.
In the single motor hybrid system shown in fig. 3, when the air pressure or the hydraulic pressure of the brake system is detected to be insufficient, the air pressure and the hydraulic pressure of the brake system can also be complemented by the high-pressure electric pump 9.
In some embodiments, in response to a start operation of a user, the running clutch is kept in a pressed state, creep torque of a motor of the vehicle is controlled to be increased according to a preset step length, and braking pressure is continuously supplemented for a braking system until after the creep torque reaches a target torque for creep start of the vehicle, whether the vehicle starts creep start within a third preset time is judged; if not, the running clutch is controlled to keep a pressed state, and the braking pressure is continuously supplemented for the braking system until the vehicle overcomes the braking resistance and starts to creep.
When the user manipulates the vehicle to start, the vehicle should ideally reach the target torque and start to advance in a short time, so it is necessary to detect whether the vehicle starts successfully after the user performs the start operation. Namely, judging whether the vehicle starts to creep in a third preset time after the creep torque of the motor reaches the target torque. Specifically, whether the vehicle has a speed or not can be judged through the speed information of the vehicle, so that whether the vehicle starts successfully or not is judged; or whether the vehicle starts successfully or not can be judged by whether the position information of the vehicle changes or not.
If the fact that the vehicle does not start to creep in the third preset time is determined, the fact that the brake pressure of the current vehicle brake system is still insufficient is indicated, and the brake pressure needs to be continuously supplemented for the brake system until the vehicle overcomes the brake resistance, and the vehicle starts to creep.
According to the embodiment of the disclosure, after a user starts, the braking pressure is continuously supplemented for the braking system, so that creep starting failure caused by insufficient braking air pressure or oil pressure is further relieved.
Fig. 4 is a schematic structural diagram of a P2.5 single-motor hybrid power system according to an embodiment of the disclosure. Similar to the above embodiment, after the ignition engine of the whole vehicle is started, if the air pressure or the hydraulic pressure of the brake system is detected to be insufficient, the C0 clutch (torque transmission clutch) 3 is disconnected, the engine determines the target rotation speed according to the corresponding relation between the rotation speed of the engine and the brake pressure (for example, the table 1 above) and increases the target rotation speed, or the brake pressure of the brake system is complemented by the high-pressure electric pump 9, so as to satisfy the brake requirement and the starting requirement of the whole vehicle in advance.
In response to a start operation by a user, the C1 clutch (running clutch) 7 is fully closed (in a pressure-tight state), the creep torque of the control motor 2 increases according to a certain gradient until the braking resistance is overcome, the creep start is started, and the vehicle speed is controlled within the creep speed range. Meanwhile, the C0 clutch (torque transmission clutch) 3 is kept in an open state, and the air pressure or the oil pressure is supplemented to a braking system by starting the engine, so that creep starting failure caused by insufficient braking air pressure or oil pressure is relieved.
If the vehicle does not start creeping start within the third preset time, the C1 clutch (running clutch) 7 is kept to be completely closed (in a pressure compaction state), the creeping torque of the motor 2 is continuously controlled to be increased according to a certain slope until the braking resistance is overcome, creeping start is started, the vehicle speed is controlled to be within the creeping speed range, and the high-pressure electric pump 9 is used for supplementing air pressure or oil pressure for a braking system during the period, so that creeping start failure caused by insufficient braking air pressure or oil pressure is relieved.
On the basis of the above embodiment, the controlling the engine to increase the rotation speed until the target rotation speed is reached, supplementing the braking system with the braking pressure, includes: according to the available electric quantity of the vehicle power battery, the operation parameters of the engine are adjusted through a generator, so that the operation parameters are kept in a preset high-efficiency working interval; the electrical energy generated by the generator is stored in the power cell.
During the control of the engine to increase the rotational speed until the target rotational speed is reached and the braking pressure is supplemented to the braking system, the operating point of the engine 1 is adjusted by the generator 8 according to the amount of power available in the power battery 10, so that the operating parameters of the engine 1 can be maintained within the efficient operating interval. Wherein the operating parameters include at least one or more of the following: engine speed, engine power, engine torque. Specifically, according to different engines, the corresponding efficient working intervals are different, and a technician can perform corresponding configuration according to actual conditions, which is not limited by the embodiment of the disclosure.
Meanwhile, the generator 8 generates electric energy during the process of adjusting the operating point of the engine 1, and the electric energy generated by the generator is stored in the power battery 10 for energy recovery.
Under the condition that the available electric quantity of the power battery 10 is sufficient, a brake air pressure booster pump or an oil pressure pump in the vehicle is completely closed (pressure compaction state) through the high-pressure electric pump 9 after the creep start fails, the creep torque passing through the motor 2 in the pure electric mode is kept to be increased according to a certain slope until the braking resistance is overcome, the creep start is started, the vehicle speed is controlled to be within the creep speed range, and the air pressure or the oil pressure is supplemented for a brake system through the high-pressure electric pump 9 during the period, so that the creep start failure caused by insufficient brake air pressure or the oil pressure is relieved.
According to the embodiment of the disclosure, the working point of the engine is regulated, so that the engine always works in a high-efficiency working interval, and the high efficiency of the creeping starting control method is ensured; meanwhile, the electric energy generated in the process of adjusting the working point of the generator is recycled to the power battery, so that the energy is recycled, and the cruising ability of the vehicle is improved.
Fig. 5 is a schematic structural diagram of a dual-motor hybrid power system according to an embodiment of the present disclosure. In the structure shown in fig. 5, as in the above embodiment, after the ignition engine of the whole vehicle is started, if the air pressure or the hydraulic pressure of the brake system is detected to be insufficient, the C0 clutch (torque transmission clutch) 3 is disconnected, and the engine determines the target rotational speed according to the corresponding relation between the rotational speed of the engine and the brake pressure (for example, table 1 above) and increases to the target rotational speed to complement the brake pressure of the brake system, so as to satisfy the brake demand and the start demand of the whole vehicle in advance.
In response to a start operation by a user, the C1 clutch (running clutch) 7 is fully closed (in a pressure-tight state), the creep torque of the control motor 2 increases according to a certain gradient until the braking resistance is overcome, the creep start is started, and the vehicle speed is controlled within the creep speed range. Meanwhile, the C0 clutch (torque transmission clutch) 3 is kept in an open state, and the air pressure or the oil pressure is supplemented to a braking system by starting the engine, so that creep starting failure caused by insufficient braking air pressure or oil pressure is relieved.
If the vehicle does not start to creep and start within the third preset time, the C1 clutch (running clutch) 7 is kept to be completely closed (in a pressure compaction state), the creep torque of the motor 2 is continuously controlled to be increased according to a certain slope until the braking resistance is overcome, the creep and start is started, the vehicle speed is controlled to be within the creep speed range, the air pressure or the oil pressure is continuously supplied to the braking system, and the creep and start failure caused by insufficient braking air pressure or the oil pressure is relieved.
According to the embodiment of the disclosure, under the condition that the braking system of the hybrid electric vehicle cannot completely release the braking due to the failure of the pneumatic auxiliary system or the hydraulic auxiliary system, the braking failure working condition can be quickly released through reasonable logic selection and control, the whole vehicle can be ensured to normally creep to start, and the creep function failure of the vehicle is prevented.
Fig. 6 is a schematic structural diagram of a creep start control device according to an embodiment of the present disclosure. The creep start control device may be the equipment to be upgraded as described in the above embodiments, or the creep start control device may be a component or assembly in the equipment to be upgraded. The creep start control device provided in the embodiment of the present disclosure may execute the processing flow provided in the embodiment of the creep start control method, as shown in fig. 6, where the creep start control device 60 includes: a detection module 61, a supplementing module 62 and a control module 63; wherein the detection module 61 is configured to detect whether a braking state of the vehicle can be released within a first preset time after an engine of the vehicle is started; the supplementing module 62 is configured to open the torque transmission clutch and supplement the braking pressure to the braking system to meet the starting requirement of the vehicle if the braking state of the vehicle cannot be released within the first preset time; the control module 63 is configured to, in response to a start operation of a user, maintain a running clutch in a pressed state, control a creep torque of a vehicle motor to increase according to a preset step, and continue to supplement a brake pressure for a brake system until the creep torque reaches a target torque for creep start of the vehicle.
Optionally, the detection module 61 includes an acquisition unit 611 and a determination unit 612; wherein the acquiring unit 611 is used for acquiring air pressure of the braking system and oil pressure of the braking system; the determining unit 612 is configured to determine that the braking state of the vehicle can be released within a first preset time if the air pressure of the braking system is greater than a first preset threshold value or the oil pressure of the braking system is greater than a second preset threshold value; if the air pressure of the braking system is smaller than or equal to a first preset threshold value and the oil pressure of the braking system is smaller than or equal to a second preset threshold value, determining that the braking state of the vehicle cannot be relieved within the first preset time.
Optionally, the supplementing module 62 is configured to control the rotation speed of the engine to reach the target rotation speed within a second preset time, and supplement the braking pressure for the braking system; and/or controlling a high-voltage electric pump to supplement the braking pressure for the braking system.
Optionally, the supplementing module 62 is further configured to obtain a correspondence between an engine speed and a brake pressure; and determining the target rotating speed of the engine according to the braking pressure and the corresponding relation.
Optionally, the supplementing module 62 is further configured to adjust an operation parameter of the engine through a generator according to an available electric quantity of the vehicle power battery, so that the operation parameter is kept within a preset efficient working interval; the electrical energy generated by the generator is stored in the power cell.
Optionally, the operation parameters of the engine at least include one or more of the following: the rotational speed of the engine, the power of the engine, the torque of the generator.
Optionally, the creep start control device 60 further includes a determining module 64, configured to determine whether the vehicle starts creep start within a third preset time; if not, the running clutch is controlled to keep a pressed state, and the braking pressure is continuously supplemented for the braking system until the vehicle overcomes the braking resistance and starts to creep.
The creep start control device of the embodiment shown in fig. 6 may be used to implement the technical solution of the above method embodiment, and its implementation principle and technical effects are similar, and are not described herein again.
Fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the disclosure. The electronic device may be a device to be upgraded as described in the above embodiments. The electronic device provided in the embodiment of the present disclosure may execute the processing flow provided in the embodiment of the creep start control method, as shown in fig. 7, where the electronic device 70 includes: memory 71, processor 72, computer programs and communication interface 73; wherein a computer program is stored in the memory 71 and configured to be executed by the processor 72 to perform the creep start control method as described above.
In addition, the embodiment of the disclosure also provides a computer readable storage medium, on which a computer program is stored, the computer program being executed by a processor to implement the creep start control method described in the above embodiment.
Furthermore, the disclosed embodiments also provide a computer program product comprising a computer program or instructions which, when executed by a processor, implement a creep start control method as described above.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A creep start control method, the method comprising:
after the engine of the vehicle is started, detecting whether the braking state of the vehicle can be released within a first preset time;
if the braking state of the vehicle cannot be released within the first preset time, opening the torque transmission clutch, and simultaneously supplementing the braking pressure for the braking system to meet the starting requirement of the vehicle;
and responding to the starting operation of a user, keeping the running clutch in a pressed state, controlling the creep torque of the vehicle motor to be increased according to a preset step length, and continuing to supplement the braking pressure for the braking system until the creep torque reaches the target torque of the creep starting of the vehicle.
2. The method of claim 1, wherein detecting whether the braking state of the vehicle can be released within a first preset time comprises:
acquiring air pressure of a braking system and oil pressure of the braking system;
if the air pressure of the braking system is greater than a first preset threshold value or the oil pressure of the braking system is greater than a second preset threshold value, determining that the braking state of the vehicle can be relieved within the first preset time;
if the air pressure of the braking system is smaller than or equal to a first preset threshold value and the oil pressure of the braking system is smaller than or equal to a second preset threshold value, determining that the braking state of the vehicle cannot be relieved within the first preset time.
3. The method of claim 1, wherein supplementing the braking system with braking pressure comprises:
controlling the rotating speed of the engine to reach a target rotating speed within a second preset time, and supplementing braking pressure for the braking system; and/or
And controlling the high-voltage electric pump to supplement the braking pressure for the braking system.
4. A method according to claim 3, wherein the controlling the rotational speed of the engine reaches the target rotational speed within a second preset time, the method further comprising, before supplementing the braking system with brake pressure:
acquiring a corresponding relation between the rotating speed of an engine and the braking pressure;
and determining the target rotating speed of the engine according to the braking pressure and the corresponding relation.
5. A method according to claim 3, wherein said controlling the engine to increase the speed until the target speed is reached, supplementing the braking system with brake pressure, comprises:
according to the available electric quantity of the vehicle power battery, the operation parameters of the engine are adjusted through a generator, so that the operation parameters are kept in a preset high-efficiency working interval;
the electrical energy generated by the generator is stored in the power cell.
6. The method of claim 5, wherein the operating parameters of the engine include at least one or more of the following:
the rotational speed of the engine, the power of the engine, the torque of the generator.
7. The method according to claim 1, wherein the method further comprises:
judging whether the vehicle starts creeping and starting in a third preset time;
if not, the running clutch is controlled to keep a pressed state, and the braking pressure is continuously supplemented for the braking system until the vehicle overcomes the braking resistance and starts to creep.
8. A creep start control device, comprising:
the detection module is used for detecting whether the braking state of the vehicle can be released within a first preset time after the engine of the vehicle is started;
the supplementing module is used for opening the torque transmission clutch and supplementing the braking pressure for the braking system at the same time so as to meet the starting requirement of the vehicle if the braking state of the vehicle cannot be relieved within the first preset time;
the control module is used for responding to the starting operation of a user, keeping the running clutch in a pressed state, controlling the creep torque of the vehicle motor to be increased according to a preset step length, and continuing to supplement the braking pressure for the braking system until the creep torque reaches the target torque of the creep starting of the vehicle.
9. An electronic device, comprising:
a memory;
a processor; and
a computer program;
wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method of any of claims 1-7.
10. A computer readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, implements the method according to any of claims 1-7.
CN202310721528.7A 2023-06-19 2023-06-19 Vermicular starting control method, device, equipment and computer readable storage medium Active CN116461529B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310721528.7A CN116461529B (en) 2023-06-19 2023-06-19 Vermicular starting control method, device, equipment and computer readable storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310721528.7A CN116461529B (en) 2023-06-19 2023-06-19 Vermicular starting control method, device, equipment and computer readable storage medium

Publications (2)

Publication Number Publication Date
CN116461529A CN116461529A (en) 2023-07-21
CN116461529B true CN116461529B (en) 2023-10-03

Family

ID=87175740

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310721528.7A Active CN116461529B (en) 2023-06-19 2023-06-19 Vermicular starting control method, device, equipment and computer readable storage medium

Country Status (1)

Country Link
CN (1) CN116461529B (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002283982A (en) * 2001-03-28 2002-10-03 Isuzu Motors Ltd On-slope start auxiliary device of vehicle
JP2007331533A (en) * 2006-06-14 2007-12-27 Toyota Motor Corp Vehicle control device
JP2012056432A (en) * 2010-09-08 2012-03-22 Daimler Ag Apparatus for assisting vehicle starting on slope
FR3063055A1 (en) * 2017-02-22 2018-08-24 Peugeot Citroen Automobiles Sa METHOD AND DEVICE FOR CONTROLLING THE TORQUE TRANSMITTED TO THE PILOT BOX OF A VEHICLE DURING A RAMPAGE PHASE
CN110861623A (en) * 2018-08-27 2020-03-06 河南森源重工有限公司 Pneumatic braking vehicle power safety control method and device
CN112141071A (en) * 2019-06-10 2020-12-29 安徽华菱汽车有限公司 Hybrid vehicle starting control method and device
CN113619585A (en) * 2021-09-22 2021-11-09 上海汽车变速器有限公司 Vehicle creep control method, apparatus, storage medium, and device
CN115648961A (en) * 2022-09-15 2023-01-31 广州汽车集团股份有限公司 Vehicle control method and device and related equipment

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002283982A (en) * 2001-03-28 2002-10-03 Isuzu Motors Ltd On-slope start auxiliary device of vehicle
JP2007331533A (en) * 2006-06-14 2007-12-27 Toyota Motor Corp Vehicle control device
JP2012056432A (en) * 2010-09-08 2012-03-22 Daimler Ag Apparatus for assisting vehicle starting on slope
FR3063055A1 (en) * 2017-02-22 2018-08-24 Peugeot Citroen Automobiles Sa METHOD AND DEVICE FOR CONTROLLING THE TORQUE TRANSMITTED TO THE PILOT BOX OF A VEHICLE DURING A RAMPAGE PHASE
CN110861623A (en) * 2018-08-27 2020-03-06 河南森源重工有限公司 Pneumatic braking vehicle power safety control method and device
CN112141071A (en) * 2019-06-10 2020-12-29 安徽华菱汽车有限公司 Hybrid vehicle starting control method and device
CN113619585A (en) * 2021-09-22 2021-11-09 上海汽车变速器有限公司 Vehicle creep control method, apparatus, storage medium, and device
CN115648961A (en) * 2022-09-15 2023-01-31 广州汽车集团股份有限公司 Vehicle control method and device and related equipment

Also Published As

Publication number Publication date
CN116461529A (en) 2023-07-21

Similar Documents

Publication Publication Date Title
US8190317B2 (en) Mode change control method of hybrid vehicle
US8491442B2 (en) Control apparatus and method for controlling a hybrid vehicle
US9610939B2 (en) Apparatus and method for controlling clutch of hybrid vehicle
US9283956B2 (en) Hybrid vehicle rapid deceleration control device
JP5569654B2 (en) Control device for hybrid vehicle
KR101588789B1 (en) Method and apparatus of controlling creep torque for vehicle including driving motor
US9457801B2 (en) Control device for hybrid vehicle
CN108778809A (en) Method for the drive system of hybrid vehicle and for operating this drive system
CN101209711A (en) Mode changeover control device for a hybrid vehicle
US9758148B2 (en) Motor vehicle having creep torque control
EP3608186B1 (en) Control method for hybrid vehicles
KR101916076B1 (en) Apparatus and method of controlling vehicle including driving motor
US20140162841A1 (en) Control device
CN112550266B (en) Hybrid vehicle clutch control method and system
JP5233652B2 (en) Hybrid vehicle start control device
JP2010143418A (en) Starting controller for hybrid vehicle
JP3671669B2 (en) Creep travel control device for hybrid vehicle
CN116461529B (en) Vermicular starting control method, device, equipment and computer readable storage medium
KR101713736B1 (en) Starting torque control system and method for hybrid electric vehicle
KR101816322B1 (en) Control method for preventing backward moving of hybrid electric vehicle
JP2012086705A (en) Control device of hybrid vehicle
KR102274014B1 (en) Regenerative braking apparatus for vehicle and method of the same
US11780423B2 (en) System and method for determining whether to start engine
JP7056761B2 (en) Vehicle control unit
US20220306081A1 (en) Control method and control system of hybrid vehicle

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant