CN114212095A - Method, system and equipment for determining key factors of vehicle starting based on simulation - Google Patents
Method, system and equipment for determining key factors of vehicle starting based on simulation Download PDFInfo
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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
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
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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
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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
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W2050/0062—Adapting control system settings
- B60W2050/0075—Automatic parameter input, automatic initialising or calibrating means
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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
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0638—Engine speed
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Abstract
The invention provides a method, a system and equipment for determining key factors of vehicle starting based on simulation, wherein the method comprises the following steps: analyzing the performance of the whole vehicle to obtain influence factors related to the starting performance of the whole vehicle, and correspondingly determining each influence factor as a simulation parameter; setting the initial value of each simulation parameter to enable the whole vehicle to be started to reach an expected state; sequentially carrying out extreme value adjustment on the initial values of the simulation parameters according to a preset adjustment rule and respectively obtaining the engine rotating speed corresponding to the extreme value state of the simulation parameters; and analyzing the engine speed corresponding to the extreme value state of each simulation parameter so as to extract a key factor from each simulation parameter. According to the invention, the key factors influencing the starting of the whole vehicle can be rapidly and efficiently analyzed in a mode of simulating the starting performance of the whole vehicle, so that the trial and error cost of the whole vehicle is greatly saved.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a method, a system and equipment for determining a key factor for starting a whole automobile based on simulation.
Background
According to the national standard, the displacement of an engine is required to be not more than 2.5L when the load is more than 4.5T, so that the problem of insufficient starting power of the current light truck usually exists, so that designers need to clearly know all key factors which have great influence on the starting performance of the whole truck, and the starting performance of the whole truck is improved by comprehensively analyzing all key factors to evaluate a feasible solution.
However, the key factors of the starting performance of the whole vehicle are usually obtained through real vehicle testing and comprehensive analysis of various parameters after the real vehicle testing, the obtaining method has the advantages of long testing time, complex testing process and huge workload brought to testing personnel, and the key factors influencing the starting of the whole vehicle cannot be obtained due to large deviation of testing results caused by difficulty in obtaining of some special working conditions.
Disclosure of Invention
The invention aims to provide a method, a system and equipment for determining a key factor of vehicle starting based on simulation, so as to solve the problems that the current vehicle test is inconvenient, and the key factor influencing the vehicle starting cannot be obtained exactly due to large deviation of test results caused by difficult acquisition of some special working conditions.
The invention provides a method for determining key factors for starting a whole vehicle based on simulation, which comprises the following steps:
analyzing the performance of the whole vehicle to obtain influence factors related to the starting performance of the whole vehicle, and correspondingly determining each influence factor as a simulation parameter;
setting the initial value of each simulation parameter to enable the whole vehicle to be started to reach an expected state;
sequentially carrying out extreme value adjustment on the initial values of the simulation parameters according to a preset adjustment rule and respectively obtaining the engine rotating speed corresponding to the extreme value state of the simulation parameters;
and analyzing the engine speed corresponding to the extreme value state of each simulation parameter so as to extract a key factor from each simulation parameter.
The method for determining the key factors for starting the whole vehicle based on simulation provided by the invention has the following beneficial effects:
the method comprises the steps of carrying out performance analysis on the whole vehicle to obtain influence factors related to the starting performance of the whole vehicle, and correspondingly determining each influence factor as a simulation parameter; setting the initial value of each simulation parameter to enable the whole vehicle to be started to reach an expected state; sequentially carrying out extreme value adjustment on the initial values of the simulation parameters according to a preset adjustment rule and respectively obtaining the engine rotating speed corresponding to the extreme value state of the simulation parameters; and analyzing the engine speed corresponding to the extreme value state of each simulation parameter so as to extract a key factor from each simulation parameter. The invention can rapidly and efficiently analyze key factors influencing the starting of the whole vehicle by simulating the starting performance of the whole vehicle, greatly saves the trial and error cost of the whole vehicle, firstly sets the initial values of simulation parameters to ensure the good starting of the whole vehicle, then respectively carries out extreme value adjustment on the simulation parameters on the basis of the good starting of the whole vehicle, and judges the influence of the adjusted simulation parameters on the starting performance of the whole vehicle, and because the rotating speed of an engine can intuitively and accurately reflect the starting performance of the whole vehicle, whether the simulation parameters are key factors can be accurately judged according to the rotating speed of the engine corresponding to the adjusted simulation parameters, thereby conveniently extracting the key factors.
In addition, the method for determining the key factors of starting the whole vehicle based on simulation provided by the invention can also have the following additional technical characteristics:
further, the step of sequentially performing extreme value adjustment on the initial values of the simulation parameters according to a preset adjustment rule and respectively acquiring the engine speeds corresponding to the extreme value states of the simulation parameters comprises:
acquiring a working absolute value range of preset simulation parameters, and extracting a working maximum value and a working minimum value from the working absolute value range;
adjusting the value of the preset simulation parameter to a working maximum value, acquiring a corresponding engine rotating speed, and setting the engine rotating speed as a first engine rotating speed;
adjusting the value of the preset simulation parameter to a working minimum value, acquiring a corresponding engine rotating speed, and setting the engine rotating speed as a second engine rotating speed;
the step of analyzing the engine speed corresponding to the extreme value state of each of the simulation parameters to extract the key factor from each of the simulation parameters includes:
the first engine rotating speed and the second engine rotating speed are reduced and compared with a preset engine rotating speed threshold value;
and if the small engine speed is smaller than the preset engine speed threshold, determining the influence factor corresponding to the preset simulation parameter as a key factor.
Further, the step of analyzing the engine speed corresponding to the extreme value state of each of the simulation parameters to extract the key factor from each of the simulation parameters further includes:
analyzing the sensitive area of each key factor, and the specific steps comprise:
setting the initial value of each simulation parameter to enable the whole vehicle to be started to reach an expected state;
adjusting the clutch position to a target clutch position to enable the engine to be in a critical state of being shut down, and acquiring the target clutch position;
and adjusting and recovering the values of the simulation parameters to initial values, adjusting the rotating speed of the engine to a target rotating speed of the engine to enable the engine to be in a critical state to be flamed out, and acquiring the target rotating speed of the engine.
Further, the key factors further include a clutch engagement time, the step of adjusting the clutch position to a target clutch position to enable the engine to be in a critical state of impending flameout, and the step of obtaining the target clutch position further includes:
and adjusting and recovering the values of the simulation parameters to initial values, then adjusting the clutch combination time to a target clutch combination time so as to enable the engine to be in a critical state of being about to flameout, and acquiring the target clutch combination time.
Further, the key factor further includes an engine torque effect time, and the step of adjusting and restoring the values of the simulation parameters to the initial values, adjusting the engine speed to the target engine speed to enable the engine to be in a critical state of being flamed out, and acquiring the target engine speed further includes:
and adjusting the engine torque effect time to a target engine torque effect time to enable the whole vehicle to be started to reach an expected state, and acquiring the target engine torque effect time.
Further, the key factor further includes a maximum torque of the engine, the adjusting the engine torque effect time to a target engine torque effect time to enable the whole vehicle to start to reach an expected state, and the step of obtaining the target engine torque effect time further includes:
the method includes adjusting the engine torque capacity to a target engine torque capacity to place the engine in a critical state of impending stall and obtaining the target engine torque capacity.
Further, the key factor further includes inertia of a flywheel of an engine, and the step of adjusting and restoring the value of each simulation parameter to the initial value, adjusting the engine speed to the target engine speed to enable the engine to be in a critical state of being about to stall, and acquiring the target engine speed further includes:
and adjusting the inertia of the engine flywheel disc to the inertia of the target engine flywheel disc so as to start the whole vehicle to reach the expected state, and acquiring the inertia of the target engine flywheel disc.
The invention also provides a system for determining the key factors of vehicle starting based on simulation, which comprises:
an acquisition module: the system is used for analyzing the performance of the whole vehicle to obtain influence factors related to the starting performance of the whole vehicle, and correspondingly determining each influence factor as a simulation parameter;
setting a module: the simulation system is used for setting the initial value of each simulation parameter so as to enable the whole vehicle to be started to reach an expected state;
an adjusting module: the system is used for sequentially carrying out extreme value adjustment on the initial values of the simulation parameters according to a preset adjustment rule and respectively acquiring the engine rotating speed corresponding to the extreme value state of the simulation parameters;
an extraction module: and the method is used for analyzing the engine speed corresponding to the extreme value state of each simulation parameter so as to extract a key factor from each simulation parameter.
The invention also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor implements the method for determining the key factor of starting the whole vehicle based on simulation.
The invention also provides a device for determining the key factor of starting the whole vehicle based on simulation, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor realizes the method for determining the key factor of starting the whole vehicle based on simulation when executing the program.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
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The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flowchart of a method for determining key factors for starting a vehicle based on simulation according to a first embodiment of the present invention;
FIG. 2 is a system diagram of a system for determining key factors of vehicle starting based on simulation according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a device for determining a vehicle starting key factor based on simulation according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Example 1
As shown in fig. 1, an embodiment of the present invention provides a method for determining a vehicle start key factor based on simulation, including steps S101 to S104.
S101, carrying out performance analysis on the whole vehicle to obtain influence factors related to the starting performance of the whole vehicle, and correspondingly determining each influence factor as a simulation parameter.
The factors influencing the starting obtained according to the comprehensive analysis of the starting performance of the whole vehicle are as follows: clutch open position (representing the torque transmission capacity of the entire vehicle), clutch open rate, engine speed, gear, engine torque response time, engine torque capacity, engine flywheel disc inertia, rear axle speed ratio, wheel radius, and vehicle weight.
And S102, setting initial values of the simulation parameters to enable the whole vehicle to be started to reach an expected state.
And the whole vehicle starting state is an expected state, namely a good state of the whole vehicle starting.
S103, sequentially carrying out extreme value adjustment on the initial values of the simulation parameters according to a preset adjustment rule and respectively obtaining the engine rotating speed corresponding to the extreme value state of the simulation parameters.
And S104, analyzing the engine speed corresponding to the extreme value state of each simulation parameter so as to extract a key factor from each simulation parameter.
The step of sequentially carrying out extreme value adjustment on the initial values of the simulation parameters according to a preset adjustment rule and respectively acquiring the engine rotating speeds corresponding to the extreme value states of the simulation parameters comprises the following steps of:
acquiring a working absolute value range of preset simulation parameters, and extracting a working maximum value and a working minimum value from the working absolute value range;
adjusting the value of the preset simulation parameter to a working maximum value, acquiring a corresponding engine rotating speed, and setting the engine rotating speed as a first engine rotating speed;
adjusting the value of the preset simulation parameter to a working minimum value, acquiring a corresponding engine rotating speed, and setting the engine rotating speed as a second engine rotating speed;
further, the step of analyzing the engine speed corresponding to the extreme value state of each of the simulation parameters to extract the key factor from each of the simulation parameters includes:
the first engine rotating speed and the second engine rotating speed are reduced and compared with a preset engine rotating speed threshold value;
and if the small engine speed is smaller than the preset engine speed threshold, determining the influence factor corresponding to the preset simulation parameter as a key factor.
The starting performance of the whole vehicle can be well reflected by the rotating speed of the engine, one simulation parameter is adjusted and other simulation parameters are fixed, if the adjustment of the simulation parameter can greatly influence the rotating speed of the engine, the simulation parameter is shown to have a large influence on the starting performance of the whole vehicle, and whether the influence on the rotating speed of the engine is large is defined by a calibrated preset threshold value of the rotating speed of the engine. The embodiment of the invention obtains the working maximum value and the working minimum value, wherein both the working maximum value and the working minimum value belong to absolute values, because the working span of each simulation parameter between the working minimum value and the working maximum value is maximum, and the working minimum value and the working maximum value are both in extreme working states generally, the whole influence of the simulation parameter on the rotating speed of the engine can be well known only by judging the influence of the two extreme working states on the rotating speed of the engine, the rotating speed of the engine in the two extreme working states of the simulation parameter is reduced, and if the reduction result is smaller than the preset rotating speed threshold value of the engine, the starting performance of the whole vehicle can be greatly influenced by the simulation parameter.
The key factors extracted according to the steps are as follows: the following steps can be used to analyze the sensitive regions of each key factor.
The step of analyzing the engine speed corresponding to the extreme value state of each simulation parameter to extract the key factor from each simulation parameter further comprises:
analyzing the sensitive area of each key factor, and the specific steps comprise:
setting the initial value of each simulation parameter to enable the whole vehicle to be started to reach an expected state;
adjusting the clutch position to a target clutch position to enable the engine to be in a critical state of being shut down, and acquiring the target clutch position;
and adjusting and recovering the values of the simulation parameters to initial values, adjusting the rotating speed of the engine to a target rotating speed of the engine to enable the engine to be in a critical state to be flamed out, and acquiring the target rotating speed of the engine.
The key factors further include clutch engagement time, the step of adjusting the clutch position to a target clutch position to enable the engine to be in a critical state of impending flameout, and the step of obtaining the target clutch position further comprises:
and adjusting and recovering the values of the simulation parameters to initial values, then adjusting the clutch combination time to a target clutch combination time so as to enable the engine to be in a critical state of being about to flameout, and acquiring the target clutch combination time.
The key factors further include engine torque effect time, the step of adjusting and recovering the values of the simulation parameters to initial values, then adjusting the engine speed to a target engine speed to enable the engine to be in a critical state of being about to flameout, and obtaining the target engine speed further comprises the following steps:
and adjusting the engine torque effect time to a target engine torque effect time to enable the whole vehicle to be started to reach an expected state, and acquiring the target engine torque effect time.
The key factors further include the maximum torque of the engine, the step of adjusting the torque effect time of the engine to the target torque effect time of the engine to enable the whole vehicle to be started to reach the expected state and acquiring the target torque effect time of the engine further comprises the following steps:
the method includes adjusting the engine torque capacity to a target engine torque capacity to place the engine in a critical state of impending stall and obtaining the target engine torque capacity.
The key factors further include inertia of a flywheel disc of the engine, the step of adjusting and recovering the values of the simulation parameters to initial values, then adjusting the rotating speed of the engine to a target rotating speed of the engine to enable the engine to be in a critical state to be flamed out, and the step of obtaining the target rotating speed of the engine further comprises the following steps:
and adjusting the inertia of the engine flywheel disc to the inertia of the target engine flywheel disc so as to start the whole vehicle to reach the expected state, and acquiring the inertia of the target engine flywheel disc.
As can be seen from the above, the value near the target clutch position is a sensitive region of the clutch position, the value near the target engine speed is a sensitive region of the engine speed, the value near the target clutch engagement time is a sensitive region of the clutch engagement time, the value near the target engine torque effect time is a sensitive region of the engine torque effect time, the value near the target engine maximum torque is a sensitive region of the engine maximum torque, and the value near the target engine flywheel disk inertia is a sensitive region of the engine flywheel disk inertia.
In a specific embodiment, a group of initial values of each simulation parameter is set, so that the whole vehicle can be started well, and the initial values of each simulation parameter are respectively as follows: the clutch position is 1.2, the engine combination rotating speed is 1000rpm, the clutch combination time is 2.5s, the engine torque response time is 50ms, the maximum torque of the engine is 175Nm/800rpm and 80Nm/400rpm, the inertia of the flywheel disc is 0.308kgm ^2, and the engine rotating speed drop pit is 679 rpm;
(1) continuously adjusting the position of the clutch, finding out that the critical position of the clutch when the engine is in a flameout state is 1.36, and the drop of the rotating speed of the engine is 346 rpm;
(2) based on each simulation parameter in the step (1), the clutch position is adjusted to be 1.1, so that the whole vehicle is well started, the engine rotating speed drop pit is 701rpm, the engine combination rotating speed for starting the whole vehicle is adjusted, and the critical engine rotating speed of the engine in a flameout state is found to be 800 rpm;
(3) continuously adjusting the clutch combination time based on the initial values of the simulation parameters, finding out that the clutch combination time of the engine in a flameout state is 1.23s, and the engine speed drop pit is 335 rpm;
(4) continuously adjusting the torque response time of the engine based on the critical clutch position 1.36 of the flameout state of the engine in the step (1) to enable the whole vehicle to be well started, wherein the torque response time of the engine is 20ms, and the rotating speed drop pit of the engine is 663 rpm;
(5) based on the excellent engine torque effect time of the whole vehicle starting in the step (4) being 20ms, the clutch position being 1.36, continuously adjusting the maximum torque curve of the engine, finding out the critical engine maximum torque of 160Nm/800rpm and 70Nm/400rpm under the flameout state of the engine, and the engine rotating speed drop pit being 290 rpm;
(6) and (2) continuously adjusting the inertia of a flywheel disc of the engine based on the critical clutch position 1.36 in the flameout state of the engine in the step (1) to enable the whole vehicle to be well started, wherein the inertia of the flywheel disc is 0.55kgm ^2, and the rotating speed drop pit of the engine is 661 rpm.
In conclusion, the method for determining the key factors of vehicle starting based on simulation provided by the invention has the beneficial effects that: the method comprises the steps of carrying out performance analysis on the whole vehicle to obtain influence factors related to the starting performance of the whole vehicle, and correspondingly determining each influence factor as a simulation parameter; setting the initial value of each simulation parameter to enable the whole vehicle to be started to reach an expected state; sequentially carrying out extreme value adjustment on the initial values of the simulation parameters according to a preset adjustment rule and respectively obtaining the engine rotating speed corresponding to the extreme value state of the simulation parameters; and analyzing the engine speed corresponding to the extreme value state of each simulation parameter so as to extract a key factor from each simulation parameter. The invention can rapidly and efficiently analyze key factors influencing the starting of the whole vehicle by simulating the starting performance of the whole vehicle, greatly saves the trial and error cost of the whole vehicle, firstly sets the initial values of simulation parameters to ensure the good starting of the whole vehicle, then respectively carries out extreme value adjustment on the simulation parameters on the basis of the good starting of the whole vehicle, and judges the influence of the adjusted simulation parameters on the starting performance of the whole vehicle, and because the rotating speed of an engine can intuitively and accurately reflect the starting performance of the whole vehicle, whether the simulation parameters are key factors can be accurately judged according to the rotating speed of the engine corresponding to the adjusted simulation parameters, thereby conveniently extracting the key factors.
Example 2
Referring to fig. 2, the present embodiment provides a system for determining a key factor of vehicle starting based on simulation, including:
an acquisition module: the method is used for analyzing the performance of the whole vehicle to obtain influence factors related to the starting performance of the whole vehicle, and correspondingly determining each influence factor as a simulation parameter.
The factors influencing the starting obtained according to the comprehensive analysis of the starting performance of the whole vehicle are as follows: clutch open position (representing the torque transmission capacity of the entire vehicle), clutch open rate, engine speed, gear, engine torque response time, engine torque capacity, engine flywheel disc inertia, rear axle speed ratio, wheel radius, and vehicle weight.
Setting a module: and the initial value of each simulation parameter is set so as to enable the whole vehicle to be started to reach an expected state.
An adjusting module: and the extreme value adjusting module is used for sequentially carrying out extreme value adjustment on the initial values of the simulation parameters according to a preset adjusting rule and respectively obtaining the engine rotating speed corresponding to the extreme value state of the simulation parameters.
An extraction module: and the method is used for analyzing the engine speed corresponding to the extreme value state of each simulation parameter so as to extract a key factor from each simulation parameter.
The adjustment module is further configured to:
acquiring a working absolute value range of preset simulation parameters, and extracting a working maximum value and a working minimum value from the working absolute value range;
adjusting the value of the preset simulation parameter to a working maximum value, acquiring a corresponding engine rotating speed, and setting the engine rotating speed as a first engine rotating speed;
adjusting the value of the preset simulation parameter to a working minimum value, acquiring a corresponding engine rotating speed, and setting the engine rotating speed as a second engine rotating speed;
the extraction module is further configured to:
the first engine rotating speed and the second engine rotating speed are reduced and compared with a preset engine rotating speed threshold value;
and if the small engine speed is smaller than the preset engine speed threshold, determining the influence factor corresponding to the preset simulation parameter as a key factor.
The key factors include clutch position and engine speed, the extraction module is further configured to:
and analyzing the sensitive area of each key factor, wherein the sensitive area is specifically used for:
setting the initial value of each simulation parameter to enable the whole vehicle to be started to reach an expected state;
adjusting the clutch position to a target clutch position to enable the engine to be in a critical state of being shut down, and acquiring the target clutch position;
and adjusting and recovering the values of the simulation parameters to initial values, adjusting the rotating speed of the engine to a target rotating speed of the engine to enable the engine to be in a critical state to be flamed out, and acquiring the target rotating speed of the engine.
The key factors further include a clutch engagement time, the extraction module further to:
and adjusting and recovering the values of the simulation parameters to initial values, then adjusting the clutch combination time to a target clutch combination time so as to enable the engine to be in a critical state of being about to flameout, and acquiring the target clutch combination time.
The key factor further includes an engine torque effect time, the extraction module further to:
and adjusting the engine torque effect time to a target engine torque effect time to enable the whole vehicle to be started to reach an expected state, and acquiring the target engine torque effect time.
The key factors further include the maximum torque of the engine, the step of adjusting the torque effect time of the engine to the target torque effect time of the engine to enable the whole vehicle to be started to reach the expected state and acquiring the target torque effect time of the engine further comprises the following steps:
the method includes adjusting the engine torque capacity to a target engine torque capacity to place the engine in a critical state of impending stall and obtaining the target engine torque capacity.
The key factors further include engine flywheel mass inertia, and the extraction module is further configured to:
and adjusting the inertia of the engine flywheel disc to the inertia of the target engine flywheel disc so as to start the whole vehicle to reach the expected state, and acquiring the inertia of the target engine flywheel disc.
Example 3
Referring to fig. 3, the present invention further provides a device for determining a critical factor of vehicle starting based on simulation, which is shown as a device for determining a critical factor of vehicle starting based on simulation in a third embodiment of the present invention, and includes a memory 20, a processor 10, and a computer program 30 stored in the memory and operable on the processor, where when the processor 10 executes the computer program 30, the method for determining a critical factor of vehicle starting based on simulation as described above is implemented.
The determination device of the vehicle starting key factor based on simulation may specifically be a computer, a server, an upper computer, and the like, and the processor 10 may be a Central Processing Unit (CPU), a controller, a microcontroller, a microprocessor, or another data Processing chip in some embodiments, and is configured to run a program code stored in the memory 20 or process data, for example, execute an access restriction program, and the like.
The memory 20 includes at least one type of readable storage medium, which includes a flash memory, a hard disk, a multimedia card, a card type memory (e.g., SD or DX memory, etc.), a magnetic memory, a magnetic disk, an optical disk, and the like. The memory 20 may in some embodiments be an internal memory unit of the determination device based on the simulated vehicle start key factor, for example a hard disk of the determination device based on the simulated vehicle start key factor. The memory 20 may also be an external storage device of the determination device based on the simulated vehicle start key factor in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are equipped on the determination device based on the simulated vehicle start key factor. Further, the memory 20 may also include both an internal storage unit and an external storage device of the determination device of the vehicle start key factor based on the simulation. The memory 20 may be used not only to store application software installed in a determination device for a simulation-based vehicle start key factor and various types of data, but also to temporarily store data that has been output or will be output.
It is noted that the configuration shown in fig. 3 does not constitute a limitation of the simulation-based overall vehicle start factor determining device, and in other embodiments, the simulation-based overall vehicle start factor determining device may include fewer or more components than those shown, or some components in combination, or a different arrangement of components.
The embodiment of the invention also provides a computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the method for determining the key factor of starting the whole vehicle based on the simulation is realized.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for determining key factors for starting of a whole vehicle based on simulation is characterized by comprising the following steps:
analyzing the performance of the whole vehicle to obtain influence factors related to the starting performance of the whole vehicle, and correspondingly determining each influence factor as a simulation parameter;
setting the initial value of each simulation parameter to enable the whole vehicle to be started to reach an expected state;
sequentially carrying out extreme value adjustment on the initial values of the simulation parameters according to a preset adjustment rule and respectively obtaining the engine rotating speed corresponding to the extreme value state of the simulation parameters;
and analyzing the engine speed corresponding to the extreme value state of each simulation parameter so as to extract a key factor from each simulation parameter.
2. The method for determining the key simulation-based vehicle starting factor according to claim 1, wherein the step of sequentially performing extreme value adjustment on the initial values of the simulation parameters according to a preset adjustment rule and respectively acquiring the engine speeds corresponding to the extreme value states of the simulation parameters comprises:
acquiring a working absolute value range of preset simulation parameters, and extracting a working maximum value and a working minimum value from the working absolute value range;
adjusting the value of the preset simulation parameter to a working maximum value, acquiring a corresponding engine rotating speed, and setting the engine rotating speed as a first engine rotating speed;
adjusting the value of the preset simulation parameter to a working minimum value, acquiring a corresponding engine rotating speed, and setting the engine rotating speed as a second engine rotating speed;
the step of analyzing the engine speed corresponding to the extreme value state of each of the simulation parameters to extract the key factor from each of the simulation parameters includes:
the first engine rotating speed and the second engine rotating speed are reduced and compared with a preset engine rotating speed threshold value;
and if the small engine speed is smaller than the preset engine speed threshold, determining the influence factor corresponding to the preset simulation parameter as a key factor.
3. The method of claim 1, wherein the key factors include clutch position and engine speed, and wherein the step of analyzing the engine speed corresponding to the extreme value condition of each of the simulation parameters to extract the key factors from each of the simulation parameters further comprises:
analyzing the sensitive area of each key factor, and the specific steps comprise:
setting the initial value of each simulation parameter to enable the whole vehicle to be started to reach an expected state;
adjusting the clutch position to a target clutch position to enable the engine to be in a critical state of being shut down, and acquiring the target clutch position;
and adjusting and recovering the values of the simulation parameters to initial values, adjusting the rotating speed of the engine to a target rotating speed of the engine to enable the engine to be in a critical state to be flamed out, and acquiring the target rotating speed of the engine.
4. The method of determining vehicle launch key factors based on simulation of claim 3, wherein the key factors further include clutch engagement time, the step of adjusting clutch position to a target clutch position to bring an engine into a critical state of impending stall, and the step of obtaining the target clutch position further includes:
and adjusting and recovering the values of the simulation parameters to initial values, then adjusting the clutch combination time to a target clutch combination time so as to enable the engine to be in a critical state of being about to flameout, and acquiring the target clutch combination time.
5. The method for determining the key factor for starting the whole vehicle based on the simulation of claim 3, wherein the key factor further comprises an engine torque effect time, the step of adjusting and restoring the value of each simulation parameter to the initial value, adjusting the engine speed to the target engine speed to enable the engine to be in the critical state of being flamed out, and the step of obtaining the target engine speed further comprises:
and adjusting the engine torque effect time to a target engine torque effect time to enable the whole vehicle to be started to reach an expected state, and acquiring the target engine torque effect time.
6. The method of claim 5, wherein the key factors further include a maximum engine torque, the adjusting the engine torque effect time to the target engine torque effect time to start the vehicle to the desired state, and the obtaining the target engine torque effect time further comprises:
the method includes adjusting the engine torque capacity to a target engine torque capacity to place the engine in a critical state of impending stall and obtaining the target engine torque capacity.
7. The method for determining the key simulation-based vehicle starting factor of claim 3, wherein the key factor further includes inertia of a flywheel of an engine, the step of adjusting and restoring the value of each simulation parameter to the initial value, adjusting the engine speed to the target engine speed to enable the engine to be in a critical state of being flamed out, and the step of obtaining the target engine speed further includes:
and adjusting the inertia of the engine flywheel disc to the inertia of the target engine flywheel disc so as to start the whole vehicle to reach the expected state, and acquiring the inertia of the target engine flywheel disc.
8. The utility model provides a finished automobile starting key factor's determination system based on simulation which characterized in that includes:
an acquisition module: the system is used for analyzing the performance of the whole vehicle to obtain influence factors related to the starting performance of the whole vehicle, and correspondingly determining each influence factor as a simulation parameter;
setting a module: the simulation system is used for setting the initial value of each simulation parameter so as to enable the whole vehicle to be started to reach an expected state;
an adjusting module: the system is used for sequentially carrying out extreme value adjustment on the initial values of the simulation parameters according to a preset adjustment rule and respectively acquiring the engine rotating speed corresponding to the extreme value state of the simulation parameters;
an extraction module: and the method is used for analyzing the engine speed corresponding to the extreme value state of each simulation parameter so as to extract a key factor from each simulation parameter.
9. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out a method for determining a key factor for a simulation-based start of a vehicle according to any one of claims 1 to 7.
10. A device for determining a key factor of starting of a whole vehicle based on simulation, which is characterized by comprising a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor implements the method for determining the key factor of starting of the whole vehicle based on simulation as claimed in any one of claims 1 to 7 when executing the program.
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