CN110135111A - Detect method, apparatus, equipment and the storage medium of four cylinder engine cylinder diameter length - Google Patents
Detect method, apparatus, equipment and the storage medium of four cylinder engine cylinder diameter length Download PDFInfo
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- CN110135111A CN110135111A CN201910479127.9A CN201910479127A CN110135111A CN 110135111 A CN110135111 A CN 110135111A CN 201910479127 A CN201910479127 A CN 201910479127A CN 110135111 A CN110135111 A CN 110135111A
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Abstract
The invention discloses a kind of method, apparatus, equipment and storage mediums for detecting four cylinder engine cylinder diameter length, and present invention firstly receives the displacement value of the four cylinder engine of input and rated speeds；Target stroke cylinder diameter ratio corresponding with the displacement value, the first corresponding relationship being stored between various displacement values and stroke-bore ratio in the default storage region are searched from default storage region；Target cylinder diameter length according to the displacement value and the target stroke cylinder diameter than calculating the four cylinder engine；The target flame propagation distance of the four cylinder engine is calculated by the first preset model according to the rated speed；Calculate current flame travel threshold value corresponding with the target flame propagation distance；The target cylinder diameter length is compared with the current flame travel threshold value, when comparison result meets preset condition, it is qualified to determine the target cylinder diameter length detection, and then can ensure the reasonability of the engine parameter of huge discharge four cylinder engine.
Description
Technical field
The present invention relates to automobile technical field more particularly to it is a kind of detect four cylinder engine cylinder diameter length method, apparatus,
Equipment and storage medium.
Background technique
In automotive field, the discharge capacity of the engine of automobile is in 2.0L hereinafter referred to as small displacement engine, and the hair of automobile
The discharge capacity of motivation is large-duty engine in 3.0L or less automobile.The gasoline engine of 3.0L~4.0L discharge capacity currently on the market
Machine, most number of cylinders are 6 cylinders.And 6 cylinder machine occupied spaces are big, are unfavorable for sending out cabin arrangement, V6 engine structure is complicated,
Technology difficulty is big, at high cost, and vibration noise is big.
In-line 4 Cylinder engine characteristics of compact layout, the moderate length of crankshaft and camshaft, to it, material requirement is not high, and occupies
Space is small, is conducive to send out cabin arrangement, it is only necessary to which a cylinder head and a camshaft, structure is simple, at low cost.
But discharge capacity is that the four cylinder engine of 3.0L or more is not common at present, one of those is the reason is that engine designs
Personnel are in design, to the bad control of cylinder diameter parameter of the parameters of huge discharge four cylinder engine, it is easy to which appearance does not design
Rational Parameters the phenomenon that, one of them important index is the bad control of cylinder diameter parameter of engine, once design it is unreasonable
It will appear various security risks, while having an effect on the dynamic property and economy of engine.
Summary of the invention
The main purpose of the present invention is to provide a kind of method, apparatus, equipment for detecting four cylinder engine cylinder diameter length
And storage medium, it is intended to solve current professional technician when participating in designing huge discharge four cylinder engine to the cylinder diameter of engine
Parameter is not easy the problem of control.
To achieve the above object, the present invention provides a kind of method for detecting four cylinder engine cylinder diameter length, the methods
The following steps are included:
Receive the displacement value and rated speed of the four cylinder engine of input；
Target stroke cylinder diameter ratio corresponding with the displacement value, the default storage region are searched from default storage region
In be stored with the first corresponding relationship between various displacement values and stroke-bore ratio；
Target cylinder diameter length according to the displacement value and the target stroke cylinder diameter than calculating the four cylinder engine；
The target flame propagation distance of the four cylinder engine is calculated by the first preset model according to the rated speed；
Calculate current flame travel threshold value corresponding with the target flame propagation distance；
The target cylinder diameter length is compared with the current flame travel threshold value, is met in comparison result pre-
If when condition, determining that the target cylinder diameter length detection is qualified.
Preferably, the target flame propagation distance that the current flame travel threshold value is twice；
It is described to be compared the target cylinder diameter length with the current flame travel threshold value, it is full in comparison result
When sufficient preset condition, determines the step of the target cylinder diameter length detection qualification, specifically includes:
The target cylinder diameter length is compared with the current flame travel threshold value；
When comparison result is that the target cylinder diameter length is less than the current flame travel threshold value, the mesh is determined
It is qualified to mark cylinder diameter length detection.
Preferably, the target fire for calculating the four cylinder engine by the first preset model according to the rated speed
It the step of flame propagation distance, specifically includes:
Target flame corresponding with the rated speed is searched from the default storage region according to the rated speed
Spread speed, second be stored in the default storage region between various rated speeds and the flame propagation velocity of engine
Corresponding relationship；
Four cylinder is calculated by the first preset model according to the rated speed and the target flame spread speed
The target flame propagation distance of engine.
Preferably, described that first preset model meter is passed through according to the rated speed and the target flame spread speed
Before the step of calculating the target flame propagation distance of the four cylinder engine, further includes:
Obtain the corresponding vehicular grade of vehicle of the four cylinder engine；
The main combustion period burning time of engine corresponding with the vehicular grade, institute are searched from the default storage region
State the third corresponding relationship being stored between different vehicular grades and main combustion period burning time in default storage region；
Correspondingly, described that first preset model meter is passed through according to the rated speed and the target flame spread speed
The step of calculating the target flame propagation distance of the four cylinder engine, specifically includes:
It is pre- by first according to the main combustion period burning time, the rated speed and the target flame spread speed
If model calculates the target flame propagation distance of the four cylinder engine.
Correspondingly, the target cylinder diameter length of the four cylinder engine is calculated by formula one:
Wherein, d indicates target cylinder diameter length, and X indicates displacement value, SBratioStroke-bore ratio is worked as in expression.
Correspondingly, first preset model is characterized by formula two:
Wherein, SflameIndicate target flame propagation distance, V indicates target flame spread speed, when A indicates main combustion period burning
Between, n indicates rated speed.
Preferably, described the step of being compared the target cylinder diameter length with the target flame propagation distance it
Afterwards, further includes:
When comparison result is the target flame propagation distance that the target cylinder diameter length is not less than twice, institute is determined
It is unreasonable to state displacement value, rated speed and the target cylinder diameter length, and the comparison result is shown.
In addition, to achieve the above object, the present invention also proposes a kind of for detecting the dress of the cylinder diameter length of four cylinder engine
It sets, described device includes:
Receiving module, the displacement value and rated speed of four cylinder engine for receiving input；
Module is obtained, for searching target stroke cylinder diameter ratio corresponding with the displacement value, institute from default storage region
State the first corresponding relationship being stored between various displacement values and stroke-bore ratio in default storage region；
First computing module, for according to the displacement value and the target stroke cylinder diameter four cylinder engine more described than calculating
Target cylinder diameter length；
Second computing module, for calculating the four cylinder engine by the first preset model according to the rated speed
Target flame propagation distance；
Third computing module, for calculating current flame travel threshold corresponding with the target flame propagation distance
Value；
Comparison module, for the target cylinder diameter length to be compared with the current flame travel threshold value,
When comparison result meets preset condition, determine that the target cylinder diameter length detection is qualified.
In addition, to achieve the above object, the present invention also proposes a kind of for detecting setting for the cylinder diameter length of four cylinder engine
Standby, the equipment includes: memory, processor and is stored in the inspection that can be run on the memory and on the processor
The step of ranging sequence, the detection program is arranged for carrying out the cylinder diameter length method of detection four cylinder engine as described above.
In addition, to achieve the above object, the present invention also proposes that a kind of storage medium, the storage medium are computer-readable
Storage medium is stored with detection program on the computer readable storage medium, real when the detection program is executed by processor
The step of now detecting the cylinder diameter length method of four cylinder engine as described above.
A kind of method detecting four cylinder engine cylinder diameter length provided by the invention, receives the four cylinder engine of input first
Displacement value and rated speed；Target stroke cylinder diameter ratio corresponding with the displacement value is searched from default storage region, it is described
The first corresponding relationship being stored in default storage region between various displacement values and stroke-bore ratio；According to the displacement value and
Target cylinder diameter length of the target stroke cylinder diameter than calculating the four cylinder engine；It is pre- by first according to the rated speed
If model calculates the target flame propagation distance of the four cylinder engine；Calculate work as corresponding with the target flame propagation distance
Preceding flame travel threshold value；The target cylinder diameter length is compared with the current flame travel threshold value, than
When relatively result meets preset condition, it is qualified to determine the target cylinder diameter length detection, and then can ensure that four cylinder of huge discharge starts
The reasonability of the engine parameter of machine.
Detailed description of the invention
Fig. 1 is the hardware running environment that the embodiment of the present invention is related to for detecting the cylinder diameter length of four cylinder engine
Equipment structural schematic diagram；
Fig. 2 is a kind of process signal of the first embodiment of the method for the cylinder diameter length for detecting four cylinder engine of the present invention
Figure；
Fig. 3 is a kind of process signal of the second embodiment of the method for the cylinder diameter length for detecting four cylinder engine of the present invention
Scheme
Fig. 4 is that the present invention is a kind of for detecting the structural block diagram of the device of the cylinder diameter length of four cylinder engine.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Referring to Fig.1, Fig. 1 is the hardware running environment that the embodiment of the present invention is related to for detecting four cylinder engine
The structural schematic diagram of the equipment of cylinder diameter length.
As shown in Figure 1, the equipment may include: processor 1001, such as CPU, communication bus 1002, user interface
1003, memory 1004.Wherein, communication bus 1002 is for realizing the connection communication between these components.User interface 1003
It may include display screen (Display), input unit such as keyboard (Keyboard), optional user interface 1003 can also include
Standard wireline interface and wireless interface.Memory 1004 can be high speed RAM memory, be also possible to stable memory
(non-volatile memory), such as magnetic disk storage.Memory 1004 optionally can also be independently of aforementioned processor
1001 storage device.
It will be understood by those skilled in the art that structure shown in Fig. 1 does not constitute the restriction to the equipment, can wrap
It includes than illustrating more or fewer components, perhaps combines certain components or different component layouts.
As shown in Figure 1, as may include operating system, Yong Hujie in a kind of memory 1004 of computer storage medium
Receive module and detection program.
In equipment shown in Fig. 1, the equipment of the cylinder diameter length for detecting four cylinder engine of the invention passes through processing
Device 1001 calls the detection program stored in memory 1004, and executes the step of the method for the cylinder diameter length of detection four cylinder engine
Suddenly.
Referring to Fig. 2, Fig. 2 is a kind of stream of the first embodiment of the method for the cylinder diameter length for detecting four cylinder engine of the present invention
Journey schematic diagram.
In the present embodiment, it the described method comprises the following steps:
Step S10: the displacement value and rated speed of the four cylinder engine of input are received；
It should be noted that the executing subject of the present embodiment is that the above-mentioned cylinder diameter for detecting huge discharge four cylinder engine is long
The processor of the equipment of degree.
It will be appreciated that participate in design huge discharge four cylinder engine designer can by the displacement value of four cylinder engine and
Rated speed is input in the equipment, this implementation is the engine for the huge discharge (i.e. discharge capacity is greater than 3.0L) being directed to, therefore this
The detection device of embodiment can prompt designer again defeated when the displacement value X for detecting designer's input is less than 3.0L
Enter the displacement value for being greater than 3.0L.
Step S20: searching target stroke cylinder diameter ratio corresponding with the displacement value from default storage region, described default
The first corresponding relationship being stored in storage region between various displacement values and stroke-bore ratio；
It should be noted that the present embodiment can pre-establish the correspondence between various displacement values and different stroke-bore ratio
Relationship is stored the corresponding relationship as the first corresponding relationship into default storage region, and the default storage region can be
Tables of data in numerical control library.
Specifically, such as the displacement value of four cylinder engine is between 3.0L~4.0L, then corresponding stroke-bore ratio
Control is between 1~1.3, and displacement value is bigger, and stroke-bore ratio is also bigger.For example, if arriving such gasoline four-cylinder engine cloth
It sets in heavy goods vehicles, the displacement value of designer's input is 3.5L, and finding stroke-bore ratio corresponding with 3.5L displacement value is
1.25, the low side torque of engine can be improved, guarantee the demand that user hauls goods or solicits guests or diners.
Step S30: the target cylinder according to the displacement value and the target stroke cylinder diameter than calculating the four cylinder engine
Electrical path length；
Specifically, the present embodiment calculates the target cylinder diameter length of the four cylinder engine by formula one:
Wherein, d indicates target cylinder diameter length, and X indicates displacement value, SBratioStroke-bore ratio is worked as in expression.If such as X=
3.5L, SBratio=1.25, then d=96mm.
Step S40: the target flame of the four cylinder engine is calculated by the first preset model according to the rated speed
Propagation distance；
In the concrete realization, the present embodiment can be searched from the default storage region according to the rated speed first with
The corresponding target flame spread speed of the rated speed is stored with various rated speeds and starts in the default storage region
The second corresponding relationship between the flame propagation velocity of machine.
It will be appreciated that the revolving speed of engine be it is proportional with the flame propagation velocity in cylinder, the present embodiment can be pre-
The corresponding relationship between various rated speeds and different flame propagation velocities is first established, it is corresponding using the corresponding relationship as second
Relationship is stored to default storage region.
Then described in being calculated according to the rated speed and the target flame spread speed by the first preset model
The target flame propagation distance of four cylinder engine.
Wherein, first preset model is characterized by formula two:
Wherein, SflameIndicate target flame propagation distance, V indicates target flame spread speed, when A indicates main combustion period burning
Between, n indicates rated speed.
If in the present embodiment designer input rated speed be 4500rpm, i.e. n=4500rpm, then find with
The corresponding target flame spread speed V=45m/s of 4500rpm revolving speed.
Further, it is known that such gasoline four-cylinder engine arrangement is in heavy goods vehicles, the main combustion period of corresponding engine
Burning time is 30 ° (CA).
Correspondingly, at rated speed 4500rpm engine burning time t=A (CA)/[n (rpm)/60 (s) × 360
(°)]=A (CA) × 60 (s)/n (rpm) × 360 (°)=30 ° × 60s/4500rpm × 360 °=0.0011s；
Therefore flame travel Sflame=V (m/s) × t (s)=(V × A)/(6 × n)=0.0011s × 45m/s=
0.00495m=49.5mm.
Step S50: current flame travel threshold value corresponding with the target flame propagation distance is calculated；
Step S60: the target cylinder diameter length is compared with the current flame travel threshold value, is comparing knot
When fruit meets preset condition, determine that the target cylinder diameter length detection is qualified.
Specifically, in the present embodiment, the current flame travel threshold value be twice the target flame propagate away from
From；
The target cylinder diameter length is compared with the current flame travel threshold value；
When comparison result is that the target cylinder diameter length is less than the current flame travel threshold value, the mesh is determined
It is qualified to mark cylinder diameter length detection；Comparison result be the target cylinder diameter length not less than twice the target flame propagate away from
From when, determine that the displacement value, rated speed and the target cylinder diameter length are unreasonable, and open up to the comparison result
Show.
That is, flame travel S of the cylinder diameter d of engine less than 2 timesflame, i.e. 2 × S of d <flameWhen, determine
The target cylinder diameter length detection is qualified, i.e., each hair for being used to design huge discharge four cylinder engine that above-mentioned designer provides
Motivation parameter is that reasonably, otherwise the aggravation of combustion knock tendency, influences dynamic property, economy.
For example, designer input above-mentioned data it is finally obtained the result is that: d=96mm < 2s=2 × 49.5=
99mm, therefore the above-mentioned design parameter of designer is reasonable.
A kind of method detecting four cylinder engine cylinder diameter length provided in this embodiment, four cylinders for receiving input first start
The displacement value and rated speed of machine；Target stroke cylinder diameter ratio corresponding with the displacement value, institute are searched from default storage region
State the first corresponding relationship being stored between various displacement values and stroke-bore ratio in default storage region；According to the displacement value
Target cylinder diameter length with the target stroke cylinder diameter than calculating the four cylinder engine；Pass through first according to the rated speed
Preset model calculates the target flame propagation distance of the four cylinder engine；It calculates corresponding with the target flame propagation distance
Current flame travel threshold value；The target cylinder diameter length is compared with the current flame travel threshold value,
When comparison result meets preset condition, it is qualified to determine the target cylinder diameter length detection, and then can ensure that four cylinder of huge discharge is sent out
The reasonability of the engine parameter of motivation.
Further, it is proposed with reference to Fig. 3 based on the method first embodiment of above-mentioned detection four cylinder engine cylinder diameter length
The second embodiment of the method for the present invention.
It is described that first default mould is passed through according to the rated speed and the target flame spread speed in the present embodiment
Type calculated before the step of target flame propagation distance of the four cylinder engine, further includes:
Step S041: the corresponding vehicular grade of vehicle of the four cylinder engine is obtained；
It will be appreciated that the load-carrying in automotive field according to automobile divides different vehicular grades, such as heavy-duty car is
Refer to that Maximum total mass is greater than 3500 kilograms of automobile.
Step S042: the main combustion period combustion of engine corresponding with the vehicular grade is searched from the default storage region
It burns the time, the third being stored between different vehicular grades and main combustion period burning time in the default storage region is corresponding to close
System；
It will be appreciated that since the length of main combustion period in engine combustion process depends primarily on the load-carrying of automobile, this reality
It applies regular meeting and pre-establishes corresponding relationship between different vehicular grades and main combustion period burning time, using the corresponding relationship as third
Corresponding relationship is stored.Such as known vehicular grade is heavy-duty car grade, then corresponding with heavy-duty car grade start
The main combustion period burning time of machine is 30 ° (CA).
Correspondingly, the step S40, specifically includes:
Step S41 is logical according to the main combustion period burning time, the rated speed and the target flame spread speed
Cross the target flame propagation distance that the first preset model calculates the four cylinder engine.
It will be appreciated that the rated speed of gasoline engine probably all turns left the right side 6000,6000 turn left right burning time very
Short, cylinder diameter has little time greatly very much, and rotating ratio is higher if stroke is too long, and the speed of final piston is also relatively high, and burning is not filled
Point, piston operation speed it is not high enough, have exceeded the limit.
The present embodiment can be as far as possible by rated speed toward pulling down lowering under rated speed, and burning is more abundant in this way,
Turn in this way it is slower if, the time of burning, the speed of entire piston was also got off with regard to longer, and the present embodiment is by huge discharge
The rated speed of four cylinder engine is set as 4500 and turns left the right side, finally determines that corresponding flame propagation velocity is the range of V (m/s)
In 30~60m/s；
It is shown according to the parameter that is related in above-mentioned first embodiment as a result, the cylinder diameter control of engine is can in 99mm
To guarantee that engine is clean-burning within burning time.Stroke-bore ratio 1.25, it is enough big, i.e., it is maximum in the cylinder of engine
Stroke can accomplish 124mm, while the maximum pump discharge of engine can be designed as 3.8L.
Therefore, in the present embodiment, after the step S10, further comprise the steps of: the displacement value be greater than 3.8L, then into
Row prompt.Displacement value for reminding designer to input must be located at 3.0 between 3.8L.
The inline four-cylinder engine of the present embodiment, maximum discharge capacity can control in 3.8L, if it is greater than 3.8L, engine
It is unable to fully burn within burning time, pinking tendency aggravation influences dynamic property and economy.
In addition, being based on above method embodiment, the present invention also proposes to protect a kind of design side of huge discharge four cylinder engine
Method embodiment, the engine displacement of the engine are 3.0L between 3.8L.
In the present embodiment, greater than the layout pattern that the petrol engine of 3.0L discharge capacity uses in-line four cylinder, from the angle of burning
Degree considers that maximum no more than 3.8L, the discharge capacity of the single cylinder of engine is 0.75L to 0.95L；
The stroke-bore ratio of in-line four cylinder machine petrol engine can be greater than 1.20, preferably 1.25；
The cylinder diameter of gasoline engine can be greater than 95mm, and highest can accomplish 99mm；Stroke can be greater than 115mm, and highest can be with
Reach 124mm；
Finally, the cylinder endogenous fire flame propagation velocity of engine is 30m/s to 60m/s, and the cylinder diameter size of engine wants small
In 2 times of target flame propagation distance.
For the petrol engine of 3.0L~3.8L discharge capacity of this implementation using in-line 4 cylinder machines, in-line 4 Cylinder engines arrangement is tight
It gathers, the moderate length of crankshaft and camshaft, to it, material requirement is not high, and occupies little space, and is conducive to send out cabin arrangement, it is only necessary to
One cylinder head and a camshaft, structure is simple, at low cost；Stroke-bore ratio, 1.25, can improve hair than control
The low side dynamic property of motivation, is more applicable in heavy goods vehicles, and in-line 4 Cylinder engines can cancel out each other in the power of vertical direction, vibrate
It is suppressed, there is good advantage in terms of balance vibration.
In addition, referring to Fig. 4, the present invention also propose it is a kind of for detecting the device of the cylinder diameter length of four cylinder engine, it is described
Device includes:
Receiving module 10, the displacement value and rated speed of four cylinder engine for receiving input；
Module 20 is obtained, for searching target stroke cylinder diameter ratio corresponding with the displacement value from default storage region,
The first corresponding relationship being stored in the default storage region between various displacement values and stroke-bore ratio；
First computing module 30, for being started according to the displacement value and the target stroke cylinder diameter than calculating four cylinder
The target cylinder diameter length of machine；
Second computing module 40, for calculating the four cylinder engine by the first preset model according to the rated speed
Target flame propagation distance；
Third computing module 50, for calculating current flame travel threshold corresponding with the target flame propagation distance
Value；
Comparison module 60, for the target cylinder diameter length to be compared with the current flame travel threshold value,
When comparison result meets preset condition, determine that the target cylinder diameter length detection is qualified.
It will be appreciated that the device of the cylinder diameter length for detecting huge discharge four cylinder engine of this implementation can be one kind
Application software, the cylinder diameter for detecting huge discharge four cylinder engine which is loaded in above-described embodiment are long
In the equipment of degree, the specific implementation of the device of the cylinder diameter length for detecting huge discharge four cylinder engine of the invention can join
According to the embodiment of the method for above-mentioned detection four cylinder engine cylinder diameter length, details are not described herein again.
In addition, the storage medium is computer readable storage medium, the meter the present invention also provides a kind of storage medium
It is stored with detection program on calculation machine readable storage medium storing program for executing, detection as described above is realized when the detection program is executed by processor
The step of cylinder diameter length method of huge discharge four cylinder engine.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the system that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or system institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or system.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in one as described above
In storage medium (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that terminal device (it can be mobile phone,
Computer, server, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of method for detecting four cylinder engine cylinder diameter length, which is characterized in that the described method comprises the following steps:
Receive the displacement value and rated speed of the four cylinder engine of input；
Target stroke cylinder diameter ratio corresponding with the displacement value is searched from default storage region, is deposited in the default storage region
Contain the first corresponding relationship between various displacement values and stroke-bore ratio；
Target cylinder diameter length according to the displacement value and the target stroke cylinder diameter than calculating the four cylinder engine；
The target flame propagation distance of the four cylinder engine is calculated by the first preset model according to the rated speed；
Calculate current flame travel threshold value corresponding with the target flame propagation distance；
The target cylinder diameter length is compared with the current flame travel threshold value, meets default item in comparison result
When part, determine that the target cylinder diameter length detection is qualified.
2. the method as described in claim 1, which is characterized in that the mesh that the current flame travel threshold value is twice
Mark flame travel；
It is described to be compared the target cylinder diameter length with the current flame travel threshold value, meet in comparison result pre-
If when condition, determining the step of the target cylinder diameter length detection qualification, specifically including:
The target cylinder diameter length is compared with the current flame travel threshold value；
When comparison result is that the target cylinder diameter length is less than the current flame travel threshold value, the target cylinder is determined
Electrical path length detection is qualified.
3. the method as described in claim 1, which is characterized in that described to pass through the first preset model meter according to the rated speed
The step of calculating the target flame propagation distance of the four cylinder engine, specifically includes:
Target flame corresponding with the rated speed is searched from the default storage region according to the rated speed to propagate
Speed, second be stored between various rated speeds and the flame propagation velocity of engine in the default storage region are corresponding
Relationship；
Four cylinder is calculated by the first preset model according to the rated speed and the target flame spread speed to start
The target flame propagation distance of machine.
4. method as claimed in claim 3, which is characterized in that described to be passed according to the rated speed and the target flame
Before broadcasting the step of speed calculates the target flame propagation distance of the four cylinder engine by the first preset model, further includes:
Obtain the corresponding vehicular grade of vehicle of the four cylinder engine；
It is searched from the default storage region main combustion period burning time of engine corresponding with the vehicular grade, it is described pre-
If the third corresponding relationship being stored in storage region between different vehicular grades and main combustion period burning time；
Correspondingly, described that institute is calculated by the first preset model according to the rated speed and the target flame spread speed
The step of stating the target flame propagation distance of four cylinder engine, specifically includes:
Pass through the first default mould according to the main combustion period burning time, the rated speed and the target flame spread speed
Type calculates the target flame propagation distance of the four cylinder engine.
5. method according to any of claims 1-4, which is characterized in that calculate the four cylinder engine by formula one
Target cylinder diameter length:
Wherein, d indicates target cylinder diameter length, and X indicates displacement value, SBratioStroke-bore ratio is worked as in expression.
6. method according to any of claims 1-4, which is characterized in that first preset model passes through two table of formula
Sign:
Wherein, SflameIndicate target flame propagation distance, V indicates target flame spread speed, and A indicates main combustion period burning time, n
Indicate rated speed.
7. method according to any of claims 1-4, which is characterized in that described by the target cylinder diameter length and the mesh
After the step of mark flame travel is compared, further includes:
When comparison result is the target flame propagation distance that the target cylinder diameter length is not less than twice, the row is determined
Magnitude, rated speed and the target cylinder diameter length are unreasonable, and are shown to the comparison result.
8. a kind of for detecting the device of the cylinder diameter length of four cylinder engine, which is characterized in that described device includes:
Receiving module, the displacement value and rated speed of four cylinder engine for receiving input；
Module is obtained, it is described pre- for searching target stroke cylinder diameter ratio corresponding with the displacement value from default storage region
If the first corresponding relationship being stored in storage region between various displacement values and stroke-bore ratio；
First computing module, for the mesh according to the displacement value and the target stroke cylinder diameter than calculating the four cylinder engine
Mark cylinder diameter length；
Second computing module, for calculating the target of the four cylinder engine by the first preset model according to the rated speed
Flame travel；
Third computing module, for calculating current flame travel threshold value corresponding with the target flame propagation distance；
Comparison module is comparing for the target cylinder diameter length to be compared with the current flame travel threshold value
When as a result meeting preset condition, determine that the target cylinder diameter length detection is qualified.
9. a kind of equipment for detecting the cylinder diameter length of four cylinder engine, which is characterized in that the equipment include: memory,
Processor and it is stored in the detection program that can be run on the memory and on the processor, the detection program configuration
For the step of realizing the cylinder diameter length method as described in any one of claim 1 to 7 for detecting four cylinder engine.
10. a kind of storage medium, which is characterized in that the storage medium is computer readable storage medium, and the computer can
It reads to be stored with detection program on storage medium, realize when the detection program is executed by processor such as any one of claim 1 to 7
The step of cylinder diameter length method of the detection four cylinder engine.
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