CN106021741B - A kind of power assembly matching process and device - Google Patents
A kind of power assembly matching process and device Download PDFInfo
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- CN106021741B CN106021741B CN201610348364.8A CN201610348364A CN106021741B CN 106021741 B CN106021741 B CN 106021741B CN 201610348364 A CN201610348364 A CN 201610348364A CN 106021741 B CN106021741 B CN 106021741B
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Abstract
The invention discloses a kind of power assembly matching process, comprising: according to preset kerb weight, the upper limit value and lower limit value of maximum power are obtained from the first envelope, and according to upper limit value and lower limit value, forms the first alternative engine set；According to preset kerb weight, the upper limit value and lower limit value of peak torque are obtained from the second envelope, and according to upper limit value and lower limit value, form the second alternative engine set；The engine for obtaining while being located in two set forms the alternative engine set of third；The gearbox to match with each engine is chosen, gearbox set is formed；Simulation calculation is carried out to each engine and with each gearbox in gearbox set, determines that engine-gearbox combines, completes power assembly matching.The invention also discloses a kind of power assembly coalignments, can quickly and effectively obtain the matching scheme of engine and gearbox, shorten the time of matched design stage consuming.
Description
Technical field
The present invention relates to field of automobile design more particularly to a kind of power assembly matching process and device.
Background technique
Power assembly refers to generating power on vehicle, and transfers power to a series of components components on road surface, extensively
Power assembly in justice includes engine, gearbox, drive shaft, differential mechanism, clutch etc., but under normal conditions, power is total
At generally only referring to engine, gearbox and the part being integrated into above gearbox.
Power assembly matched design is the important prerequisite of vehicle project verification, by setting in advance to the power assembly of vehicle
Meter, emulation, verification etc. determine the power scheme of final vehicle.Current each motor corporation generallys use existing experience or logical
The suggestion selection power assembly configuration of consulting firm's offer is crossed, this way has the following problems: first is that the R&D cycle of vehicle
Too long, under present way, the R&D cycle of vehicle is up to 3 years, thus not comprehensive enough to the prediction in vehicle market and timely, drop
Competitiveness when low vehicle listing；Second is that the selection for matching the engine and gearbox when carrying for power assembly is not bright
True matching process, but matched by experience accumulation, it not can guarantee matched efficiency and subjective degree, and then increase research and development
The time that stage is expended.
Summary of the invention
In view of the above-mentioned problems, the purpose of the present invention is to provide a kind of power assembly matching process and device, it can be quickly quasi-
True obtains the matching scheme of engine and gearbox, to guarantee matched efficiency, shortens the power assembly matched design stage
The spent time.
The present invention provides a kind of power assembly matching process, comprising:
According to the preset kerb weight of vehicle to be designed, obtained from the first envelope corresponding with the preset kerb weight
Engine maximum power upper limit value and lower limit value, and choose maximum power be located at the upper limit value and the lower limit value it
Between engine, form the first alternative engine set；Wherein, first envelope is by preconfigured at least two
The kerb weight of existing vehicle and the maximum power of engine of predefined type are fitted and the envelope that obtains；
According to the preset kerb weight, engine corresponding with the preset kerb weight is obtained from the second envelope
Peak torque upper limit value and lower limit value, and choose engine of the peak torque between the upper limit value and lower limit value,
Form the second alternative engine set；Wherein, second envelope is by preconfigured at least two predefined types
The kerb weight of existing vehicle and the peak torque of engine is fitted and the envelope that obtains；
The engine for obtaining while being located in the described first alternative engine set and the second alternative engine set,
Form the alternative engine set of third；
Choose the gearbox to match with the peak torque of each engine in the alternative engine set of the third, group
At gearbox set；
To in the alternative engine set of the third each engine and in the gearbox set of the Engine Matching
Each gearbox carry out simulation calculation, determine the engine-for meeting predetermined power index and/or predetermined economic index
Gearbox combination completes power assembly matching.
Preferably, first envelope includes the upper limit line and lower limit line on the first coordinate system；Described first sits
The horizontal axis of mark system indicates the kerb weight of vehicle, and is indicated with x-axis, and the longitudinal axis of first coordinate system indicates the engine of vehicle
Maximum power, and indicated with y-axis；
The then upper limit value of the maximum power of engine corresponding with the preset kerb weight are as follows: in the upper limit line,
Abscissa is the value of the ordinate of the point of the preset kerb weight；
The lower limit value of the maximum power of engine corresponding with the preset kerb weight are as follows: horizontal in the lower limit line
Coordinate is the value of the ordinate of the point of the preset kerb weight.
Preferably, second envelope includes the upper limit line and lower limit line on the second coordinate system；Described second sits
The horizontal axis of mark system indicates the kerb weight of vehicle, and is indicated with x-axis, and the longitudinal axis of second coordinate system indicates the engine of vehicle
Peak torque, and indicated with y-axis；
The then upper limit value of the peak torque of engine corresponding with the preset kerb weight are as follows: in the upper limit line,
Abscissa is the value of the ordinate of the point of the preset kerb weight；
The lower limit value of the peak torque of engine corresponding with the preset kerb weight are as follows: horizontal in the lower limit line
Coordinate is the value of the ordinate of the point of the preset kerb weight.
Preferably, gearbox the first matching condition of satisfaction to match with the peak torque of the engine: Tt >=
0.95Te, wherein Tt is the peak torque of gearbox, and Te is the peak torque of engine.
Preferably, the gearbox to match with the peak torque of the engine also meets the second matching condition: Tt≤
1.25Te。
Preferably, the peak torque of each engine in selection and the alternative engine set of the third matches
Gearbox, form gearbox set before, further includes:
According to preset oil consumption limit-discharge curve, the engine in the alternative engine set of the third is screened,
It obtains characteristic operating point fuel consumption values and meets the engine of the oil consumption limit-discharge curve requirement, and the third is alternatively started
Machine set is updated to meet the engine of the oil consumption limit-discharge curve requirement.
Preferably, the peak torque of each engine in selection and the alternative engine set of the third matches
Gearbox, form gearbox set before, further includes:
It is required according to the arrangement of the vehicle to be designed, from the alternative engine set of the third, is filtered out full
The engine that the foot arrangement requires, and be updated to the alternative engine set of the third to meet the arrangement and want
The engine asked.
The present invention also provides a kind of power assembly coalignments, comprising:
First set component units are obtained from the first envelope for the preset kerb weight according to vehicle to be designed
The upper limit value and lower limit value of the maximum power of engine corresponding with the preset kerb weight, and choose maximum power and be located at institute
The engine between upper limit value and the lower limit value is stated, the first alternative engine set is formed；Wherein, first envelope is
Intended by the kerb weight of existing vehicle to preconfigured at least two predefined types and the maximum power of engine
The envelope for closing and obtaining；
Second set component units, for according to the preset kerb weight, obtained from the second envelope with it is described pre-
The upper limit value and lower limit value of the peak torque of the corresponding engine of kerb weight are set, and chooses peak torque and is located at the upper limit value
Engine between lower limit value forms the second alternative engine set；Wherein, second envelope is by matching in advance
The kerb weight of existing vehicle and the peak torque of engine at least two predefined types set are fitted and the packet that obtains
Winding thread；
Third set component units, for obtaining while being located at the described first alternative engine set and described second alternatively
Engine in engine set forms the alternative engine set of third；
Matching unit, for choosing the peak torque phase with each engine in the alternative engine set of the third
The gearbox matched forms gearbox set；
Simulation unit, for in the alternative engine set of the third each engine and with the Engine Matching
Each gearbox in gearbox set carries out simulation calculation, determines to meet predetermined power index and/or predetermined economy
The engine-gearbox of index combines, and completes power assembly matching.
Preferably, further includes:
First screening unit is used for according to preset oil consumption limit-discharge curve, in the alternative engine set of the third
Engine screened, obtain the engine that characteristic operating point fuel consumption values meet the oil consumption limit-discharge curve requirement, and will
The alternative engine set of third is updated to meet the engine of the oil consumption limit-discharge curve requirement.
Preferably, further includes:
Second screening unit is alternatively started for being required according to the arrangement of the vehicle to be designed from the third
In machine set, the engine for meeting the arrangement requirement is filtered out, and the alternative engine set of the third is updated to
Meet the engine of the arrangement requirement.
Power assembly matching process and device provided in an embodiment of the present invention, according to the kerb weight of the vehicle to be designed
And pre-generated the first envelope and the second envelope, it obtains in one timing of kerb weight, maximum power and most
The value range of large torque, so as to be quickly obtained required alternative engine set, thereafter according to the matching condition of formulation,
It is quickly obtained the gearbox with the Engine Matching in the alternative engine set, finally by simulation calculation, is determined full
The engine and gearbox combination of sufficient condition, to be quickly obtained the configuration of power assembly.Since the embodiment of the present invention is raw
At power assembly configuration be to be obtained according to objective data, on the one hand, avoid when being configured by experience, subjectivity
Too strong disadvantage；On the other hand, matched efficiency also can be improved, shorten the time of research and development, so as to be carried out to vehicle market
Timing and comprehensive prediction, increase competitiveness when vehicle listing.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, attached drawing needed in embodiment will be made below
Simply introduce, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow diagram of power assembly matching process provided in an embodiment of the present invention.
Fig. 2 is the relational graph of maximum power provided in an embodiment of the present invention and kerb weight.
Fig. 3 is the relational graph of maximum engine torque and kerb weight provided in an embodiment of the present invention.
Fig. 4 is the characteristic operating point oil consumption and the relational graph of discharge capacity of naturally aspirated engine.
Fig. 5 is the characteristic operating point oil consumption and the relational graph of discharge capacity of engine with supercharger.
Fig. 6 is 2015 Chinese market SUV gearbox distribution maps.
Fig. 7 is the gear number distribution map of the AT gearbox of 2015 Chinese market SUV.
Fig. 8 is the gear number distribution map of the MT gearbox of 2015 Chinese market SUV.
Fig. 9 is the relational graph of comprehensive oil consumption and kerb weight provided in an embodiment of the present invention.
Figure 10 is the structural schematic diagram of power assembly coalignment provided in an embodiment of the present invention.
Figure 11 is the structural schematic diagram for the power assembly coalignment that the preferred embodiment of the present invention provides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the embodiment of the present invention provides a kind of power assembly matching process, for fast and accurately obtaining power
In assembly, the matching scheme of engine and gearbox includes at least following steps:
S101 is obtained from the first envelope and preset is reorganized and outfit matter with described according to the preset kerb weight of vehicle to be designed
Measure the upper limit value and lower limit value of the maximum power of corresponding engine, and choose maximum power be located at the upper limit value and it is described under
Engine between limit value forms the first alternative engine set；Wherein, first envelope is by preconfigured
The kerb weight of existing vehicle and the maximum power of engine of at least two predefined types are fitted and the envelope that obtains.
In embodiments of the present invention, the kerb weight refers to that automobile equips complete (such as spare tyre, work by factory specification
Tool etc. installation it is complete), various greases fill after weight.Wherein, the kerb weight of vehicle to be designed is to preset.
In embodiments of the present invention, first envelope passes through to the existing of preconfigured at least two predefined types
The kerb weight of vehicle (such as Vehicles Collected from Market vehicle on sale with vehicle same type to be designed) and the maximum power of engine
It is obtained after being fitted.As shown in Fig. 2, first envelope includes the upper limit line and lower limit line on the first coordinate system；
The horizontal axis of first coordinate system indicates the kerb weight of vehicle, and is indicated with x-axis, and the longitudinal axis of first coordinate system indicates vehicle
Engine maximum power, and indicated with y-axis.In fitting, the kerb weight and the engine can be first obtained
Hereafter the first trend line of maximum power obtains the first envelope of the first trend line further according to first trend line.Example
Such as, in a kind of implementation method, a fixed percentage can be added to the ordinate of each point on the first trend line
(or fixed value) obtains the upper limit line of first envelope, and subtracts to the ordinate of each point on the first trend line
One fixed percentage (or fixed value) obtains the lower limit line of first envelope.Wherein, the percentage of the fixation or
Fixed value can be obtained by experience, can also be obtained by debugging, because guaranteeing the percentage or fixed value of the fixation feelings small as far as possible
Under condition, the ratio of point and total point between the upper limit line and lower limit line of first envelope reaches preset threshold value, such as
Greater than 80%.
In embodiments of the present invention, the bandwidth that the upper limit line and the lower limit line are formed is characterized in the whole of the vehicle
In the case that standby quality determines, the range of choice of the maximum power.Wherein, corresponding with the preset kerb weight
The upper limit value of the maximum power of engine are as follows: in the upper limit line, abscissa is the vertical seat of the point of the preset kerb weight
Target value；The lower limit value of the maximum power of engine corresponding with the preset kerb weight are as follows: in the lower limit line, horizontal seat
It is designated as the value of the ordinate of the point of the preset kerb weight.
In embodiments of the present invention, after obtaining the upper limit value and lower limit value, from optional engine resources bank, choosing
Engine of the maximum power between the upper limit value and lower limit value is taken out, the first alternative engine set is formed.
It should be noted that in embodiments of the present invention, the drafting and generation of the first trend line can be by having at present
Algorithm or data processing software (such as MATLAB, origin) draw, the present invention is not specifically limited.
S102 is obtained corresponding with the preset kerb weight according to the preset kerb weight from the second envelope
The upper limit value and lower limit value of the peak torque of engine, and choose hair of the peak torque between the upper limit value and lower limit value
Motivation forms the second alternative engine set；Wherein, second envelope is by predetermined to preconfigured at least two
The kerb weight of existing vehicle and the peak torque of engine of type are fitted and the envelope that obtains.
In embodiments of the present invention, second envelope passes through to the existing of preconfigured at least two predefined types
The kerb weight of vehicle (such as Vehicles Collected from Market vehicle on sale with vehicle same type to be designed) and the peak torque of engine
It is obtained after being fitted.As shown in figure 3, second envelope includes the upper limit line and lower limit line on the second coordinate system；
The horizontal axis of first coordinate system indicates the kerb weight of vehicle, and is indicated with x-axis, and the longitudinal axis of second coordinate system indicates vehicle
Engine peak torque, and indicated with y-axis.In fitting, the kerb weight and the engine can be first obtained
Hereafter the second trend line of peak torque obtains the second envelope of the second trend line further according to second trend line.Example
Such as, in a kind of implementation method, a fixed percentage can be added to the ordinate of each point on the second trend line
(or fixed value) obtains the upper limit line of second envelope, and subtracts to the ordinate of each point on the second trend line
One fixed percentage (or fixed value) obtains the lower limit line of second envelope.Wherein, the percentage of the fixation or
Fixed value can be obtained by experience, can also be obtained by debugging, because guaranteeing the percentage or fixed value of the fixation feelings small as far as possible
Under condition, the ratio of point and total point between the upper limit line and lower limit line of second envelope reaches preset threshold value, such as
Greater than 80%.
The upper limit value of the maximum power of engine corresponding with the preset kerb weight are as follows: horizontal in the upper limit line
Coordinate is the value of the ordinate of the point of the preset kerb weight；The maximum work of engine corresponding with the preset kerb weight
The lower limit value of rate are as follows: in the lower limit line, abscissa is the value of the ordinate of the point of the preset kerb weight.
In embodiments of the present invention, after obtaining the upper limit value and lower limit value, from optional engine resources bank, choosing
Engine of the peak torque between the upper limit value and lower limit value is taken out, the second alternative engine set is formed.
S103, the hair for obtaining while being located in the described first alternative engine set and the second alternative engine set
Motivation forms the alternative engine set of third.
S104 chooses the speed change to match with the peak torque of each engine in the alternative engine set of the third
Case forms gearbox set.
In embodiments of the present invention, it in power assembly matching process, after having selected engine, needs to Engine Matching
Suitable gearbox, determining after gearbox-type generally is matched substantially former with the peak torque that gearbox can bear
Then, if the torque that can bear of selected gearbox is too small, just must the output torque to engine carry out limit and turn round setting, general in this way
Will lead to engine cannot perform to maximum power point；If it is excessive that selected gearbox bears torque, the torque mistake of gearbox can be made
It is surplus, increase integral vehicle cost；Based on the above analysis, in vehicle power assembly matching process, a suitable gearbox is selected extremely
Close it is important, the embodiment of the present invention based on existing market vehicle matched data analyze, in conjunction with the experience for matching carrying in recent years, mention
Go out following matching condition:
First matching condition: Tt >=0.95Te；
Second matching condition: Tt≤1.25Te；
Wherein, Tt is the peak torque of gearbox, and Te is the peak torque of engine；
In the above matching condition, the first matching condition is necessary condition, and the second matching condition is reference conditions.
In embodiments of the present invention, according to above-mentioned matching condition, in conjunction with every in the alternative engine set of the third
The peak torque of a engine, it can determine the gearbox with each Engine Matching, these gearboxes are put into one
In set, that is, constitute gearbox set.It is recognised that each engine in the alternative engine set of third is corresponding
One gearbox set.
It is turned round it should be noted that the torque for being possible to the gearbox of selection is greater than the engine maximum in the second matching condition
1.25 times of square, such case obviously can satisfy the matched performance requirement of vehicle, but with the increase of gearbox torque, generally
Gearbox weight and manufacturing cost can all be increase accordingly, and at this moment just be needed from integral vehicle cost, kerb weight, the side such as arrangement space
Face is gone to judge whether to be suitble to carrying.
It should be noted that in embodiments of the present invention, when generating the gearbox, also need to consider manual gear, from
The factors such as dynamic gear, the present invention is not specifically limited.
S105, in the alternative engine set of the third each engine and with the gearbox collection of the Engine Matching
Each gearbox in conjunction carries out simulation calculation, determines the hair for meeting predetermined power index and/or predetermined economic index
Motivation-gearbox combination completes power assembly matching.
In embodiments of the present invention, after obtaining the alternative engine set of third and the gearbox set, to institute
The gearbox stated in each engine and the matched gearbox set in the alternative engine set of third carries out group one by one
It closes, and simulation calculation is carried out to each combination, including calculate its power performance (such as acceleration, maximum speed) and/or economy
Can (such as integrate oil consumption, characteristic operating point oil consumption), and judge its power performance whether meet scheduled power index and/or
Whether its economic performance meets scheduled economic index, if satisfied, then configuring the assembled scheme as a power assembly
Scheme, and recorded.
In conclusion power assembly matching process provided in an embodiment of the present invention and device, according to the vehicle to be designed
Kerb weight and pre-generated the first envelope and the second envelope, obtain in the timing of kerb weight one, engine is most
High-power and peak torque value range, so as to be quickly obtained required alternative engine set, thereafter according to acquisition
It determines to meet item finally by simulation calculation with the gearbox of the Engine Matching in the alternative engine set of the third
The engine and gearbox combination of part, to be quickly obtained the configuration of power assembly.It is generated due to the embodiment of the present invention
Power assembly configuration is obtained according to objective data, on the one hand, is avoided when being configured by experience, subjectivity is too strong
The shortcomings that；On the other hand, matched efficiency also can be improved, shorten the time of research and development, so as to carry out timing to vehicle market
With comprehensive prediction, competitiveness when vehicle listing is increased.
It should be noted that in a preferred embodiment of the invention, before step S104, further includes:
S1041, according to preset oil consumption limit-discharge curve, to the engine in the alternative engine set of the third into
Row screening, obtains the engine that characteristic operating point fuel consumption values meet the oil consumption limit-discharge curve requirement, and the third is standby
Motivation set is published to be updated to meet the engine of the oil consumption limit-discharge curve requirement.
In embodiments of the present invention, oil consumption is also an important reference indicator of engine, in order to reduce final imitate
The workload really calculated first can alternatively start the third according to the oil consumption of the engine in the alternative engine set of third
Engine in machine set is screened.Specifically, a preset oil consumption limit-discharge curve can be generated first, (curve can
Curve, the curve of country's definition or the curve of the Market Definition defined for automobile manufacture or research and development intra-company), then by institute
The exhaust and fuel consumption values for stating the engine in the alternative engine set of third are indicated on the coordinate system in the form of coordinate points,
If coordinate points are located at the lower section of the oil consumption limit-discharge curve, then it represents that the engine meets the requirements, otherwise, then it represents that hair
Motivation is undesirable.
In embodiments of the present invention, the satisfactory engine is retained in the alternative engine set of the third
It is interior, and undesirable engine is weeded out from the alternative engine set of the third, to alternatively send out the third
Motivation set is updated.
It should be noted that in a preferred embodiment of the invention, further includes:
S1042 is required according to the arrangement of the vehicle to be designed, from the alternative engine set of the third, sieve
The engine for meeting the arrangement requirement is selected, and is updated to the alternative engine set of the third to meet the vehicle
Arrange desired engine.
After the selected good engine and the gearbox, need to check power assembly energy according to the design scheme of vehicle
It is no to meet arrangement requirement, for example, in arrangement, it is desirable that engine is front deck arrangement, and if the third is standby
The engine for publishing some model in motivation set is longitudinal, is not able to satisfy front deck arrangement and requires, thus needing should
Engine is weeded out out of the third alternative engine set, in this way, it can be further reduced the workload of final simulation calculation,
To further shorten the time of research and development.
In order to facilitate the understanding of the present invention, the present invention will be described with an actual example below.
This example is by taking existing market small-sized SUV more salable as an example, it is assumed that it is required that a small-sized SUV of exploitation, then it is dynamic
The matching step of power assembly (main to consider engine and gearbox) is as follows:
(1) it is inputted according to project, determines whole-car parameters:
Vehicle essential information is directly inputted by project team, as shown in table 1:
Table 1
(2) according to market model analysis on sale, alternative engine is determined:
The index of general characterization engine performance has power, torque and characteristic operating point fuel consumption values, and wherein power, torque are
Its power index, performance number and max. speed have direct relation, and torque can objectively respond its accelerating ability；Feature operating condition
Point fuel consumption values can represent an engine economic performance, so, select these three indexs as the standard of engine primary election.
Generally can all there be optional resource of engine matched with its in complete system plant, and the main purpose of this step work is from starting
Suitable engine is selected alternately in the optional resources bank of machine.
Firstly, determining the maximum power of satisfactory engine.
According to the database analysis of 2015 markets vehicle on sale, wherein having 814 sections of bearing-type SUV vehicles, by these data
As background data.The relational graph of kerb weight and maximum power is made, as shown in Fig. 2, the wherein abscissa table of lesser point
Show that the kerb weight of market vehicle on sale, ordinate indicate corresponding maximum power, the abscissa of biggish point is pre-
Kerb weight is set, ordinate is the maximum power of the engine in alternative engine resource.To market vehicle kerb weight on sale
It is fitted with the relationship of maximum power, obtains the first trend line of kerb weight and maximum power:
Y=22.953e0.00105x
The coefficient of determination R being wherein fitted2=0.736, confidence level is higher.It can be seen that from Fig. 2 and fitting formula with whole
The increase of standby quality, the maximum power of general engine also will increase, and have exponent relation therebetween.
Next makes the first envelope of first trend line, makes the upper limit line and lower limit line of first trend line respectively, such as
Shown in Fig. 2, the data point between upper limit line and lower limit line accounts for the 89% of total data, that is to say, that confidence interval 0.89, it can
Reliability is higher.In embodiments of the present invention, the physical significance of first trend line, upper limit line and lower limit line are as follows: first trend line table
The fundamental relation for having levied kerb weight and maximum power represents the average level in market；Upper limit line and lower limit line are altogether
Bandwidth is characterized in the case where kerb weight determines, the optional range of maximum power has certain directive significance.It is wherein low
It is on the weak side in the power performance being located at below lower limit line, and it is located at the vehicle above upper limit line, dynamic property is preferable.
Finally, as seen from Figure 2, for determining kerb weight, there is four sections of engines in the optional resources bank of engine
Power performance between the upper limit line and the lower limit line, then choose this four sections of engines and generate the first alternative engines
Set, design parameter are as follows:
Table 2
B. kerb weight and peak torque relationship.
Kerb weight is consistent with the determination thinking of maximum power with the thinking of peak torque relationship with kerb weight.
The relation curve of kerb weight and peak torque to market vehicle on sale is fitted, and obtains second trend line:
Y=35.606e0.0012x
Wherein R2=0.74, confidence level is higher.It can be seen that the increase with kerb weight from Fig. 3 and fitting formula, one
As peak torque also will increase, and have exponent relation therebetween.
It is seen by Fig. 3 to find out, for scheduled kerb weight, is fallen between the upper limit line and lower limit line of the second envelope
Optional engine has six sections, then chooses this six sections of engines and generate the second alternative engine set, table specific as follows:
Table 3
Wherein, there are four sections of engines to be consistent with according to the selection of table 1, be 1.3T, 1.6L, 1.5L and 1.0T respectively,
It since 2.0L and 1.8L maximum power is excessive, is unsatisfactory for requiring, therefore excludes, in this way, i.e. according to the described first alternative engine collection
It closes and the second alternative engine set generates the alternative engine set of third.
C. characteristic operating point fuel consumption values.
Characteristic operating point fuel consumption values can characterize the economic performance of engine, and the oil consumption that will have a direct impact on vehicle is horizontal.Tool
Body, as shown in Figures 4 and 5, by Fig. 4 and Fig. 5 it is found that the characteristic operating point fuel consumption values of 1.6L are inclined in four alternative engines
Height, and its power index and 1.5L are suitable, therefore exclude.
To sum up, according to the performance indicator of engine, the alternative engine selected from optional engine resources bank is 1.3T,
1.5L and 1.0T, shown in design parameter such as table 4 (i.e. the alternative engine set of third):
Table 4
(3) gearbox set is determined:
Since the vehicle project demand carries automatic and manual transmission simultaneously, automatic gear-box type and gear number are not
Fixed, manual transmission gear number is uncertain, therefore need to carry automatic gear-box type, gear number and hand gear to existing market vehicle
Gear box number is analyzed, specific as follows:
A. gearbox-type determines.
As shown in fig. 6, Fig. 6 is 2015 Chinese market SUV gearbox distribution maps, it will be appreciated from fig. 6 that in small-sized SUV, MT, AT
Accounting is 54%, 33% respectively, is the market mainstream.It is recommended that selection AT gearbox is optionally.
B. automatic gear-box gear number determines.
As shown in fig. 7, Fig. 7 is the gear number distribution map of the AT gearbox of 2015 Chinese market SUV, as shown in Figure 7,2015
In Chinese market small-sized SUV on sale, AT gearbox only has 4,6 two kind of gear number, accounts for 46% and 54% respectively, predicts AT vehicle
In 6 grades of accountings by sustainable growth, list within AR vehicle estimated 2017, therefore it is preferred that 6AT.
C. manual transmission gear number determines.
As shown in figure 8, Fig. 8 is the gear number distribution map of the MT gearbox of 2015 Chinese market SUV, as shown in Figure 8,2015
In Chinese market small-sized SUV on sale, MT gearbox only has 5,6 two kind of gear number, accounts for 88% and 12% respectively；MT vehicle at present
In 6 grades of ratios it is smaller, predict MT vehicle in 6 grades of accountings sustainable growth, AR vehicle, 5MT and 6MT are suitable for carrying.
To sum up, AR vehicle automatic gear-box selects 6 grades of AT gearboxes, manually selects 5 grades or 6 grades of manual transmission.
D. gearbox matching principle.
In power assembly matching process, after having selected engine, need for the suitable gearbox of each Engine Matching,
The peak torque that generally can bear after gearbox-type with gearbox is determined for matched basic principle, if selected gearbox
It is too small to can bear torque, limit must be just carried out to engine output torque and turns round setting, will will lead to engine in this way cannot send out
Maximum power point is waved, vehicle dynamic property can be influenced；If it is excessive that selected gearbox bears torque, the torsion of gearbox can be made
Square is superfluous, increases integral vehicle cost；Based on the above analysis, in vehicle power assembly matching process, a suitable speed change is selected
Case is most important, but there is presently no unified matching principle, general vehicle factor is all determined with empirical value, is based on existing market vehicle
The matched data of type is analyzed, and in conjunction with the experience for matching carrying in recent years, the invention proposes in power assembly, gearbox maximum is turned round
Square-maximum engine torque matching condition, the matching condition are as follows:
First matching condition: Tt >=0.95Te
Second matching condition: Tt≤1.25Te
Wherein, Tt is gearbox peak torque, and Te is maximum engine torque；In the above matching condition, the first matching item
Part is necessary condition, and the second matching condition is reference conditions.
Under normal circumstances, it is possible to choose gearbox torque be greater than the maximum engine torque in second matching condition
1.25 times, such case can satisfy the matched performance requirement of vehicle, but with the increase of gearbox torque, general gearbox weight
Amount and manufacturing cost can all be increase accordingly, and at this moment just be needed from integral vehicle cost, kerb weight, arrangement space etc. goes to judge
If appropriate for carrying.
E. gearbox selects.
After gearbox-type, gear number and matching condition has been determined, it is suitable to select from optional gearbox resources bank
Gearbox, optional gearbox resources bank are as follows:
Table 5
As can be seen from Table 5, there are three types of optional automatic gear-box, respectively AT, CVT and DCT, due to not specific
It is required that the type of gearbox, therefore according to analysis in front, select AT gearbox.
Since in three sections of engines selecting before, the smallest torque is 145N.m, maximum is 192N.m, in conjunction with above-mentioned
Matching condition and gear number are analyzed, and love letter 6AT is met the requirements in AT gearbox, and wherein 5MT and 6MT maximum receiving torque value is
250N.m also meets matching condition, but gear number is combined to analyze, and the market share of 6MT can continue to increase, and differs not in cost
Under the premise of big, manual transmission is selected from the 6MT ground.In this way, producing gearbox set, as shown in table 6.
Table 6
(4) power assembly matches.
There are two basic demands when power assembly matches: a. meets arrangement and requires；B. vehicle performance is up to standard.
After having selected engine and gearbox, can need to check power assembly according to the design scheme of vehicle meet cloth
Requirement is set, this principle is necessary condition, under the premise of meeting arrangement requirement, carries out vehicle performance simulation calculation, main to calculate
Then dynamic property, economy judge that power assembly configures according to vehicle dynamic property set target value and comprehensive fuel economy regulation limit value
Whether meet the requirements.
According to the above-mentioned engine and gearbox chosen, carries out power assembly arrangement and check, as shown in table 7:
Table 7
As shown in Table 7, since 1.0T engine is longitudinal, it is not able to satisfy front deck arrangement and requires, therefore excludes.Remaining two
Engine can satisfy arrangement and require, therefore matches to these four power assemblies and carry out dynamic property, economy simulation calculation, as a result such as
Under:
Table 8
According to comprehensive fuel consumption values regulation limit value requirement, simulation result is verified.
As shown in figure 9, Fig. 9 is the relational graph of comprehensive oil consumption and kerb weight provided in an embodiment of the present invention, include in figure
Comprehensive fuel economy regulation limit value in 2016, oil consumption target value in 2017, it will be seen from figure 9 that 4 kinds of power assembly configurations are able to satisfy
Comprehensive fuel economy regulation limit value in 2016, while thering are 2 kinds to be also able to satisfy oil consumption target value in 2017, show vehicle better economy.
(5) power assembly configuration is completed.
By the simulation calculation of step (4), 4 kinds of obtained power assembly allocation plans are able to satisfy arrangement and oil consumption limit value
Laws and regulations requirement, therefore select power assembly configuration as follows:
Table 9
In this way, obtaining the power assembly configuration of meet demand.
Referring to Fig. 10, the embodiment of the present invention also provides a kind of power assembly coalignment 100, comprising:
First set component units 10 are obtained from the first envelope for the preset kerb weight according to vehicle to be designed
The upper limit value and lower limit value of the maximum power of engine corresponding with the preset kerb weight are taken, and chooses maximum power and is located at
Engine between the upper limit value and the lower limit value forms the first alternative engine set；Wherein, first envelope
It is to be carried out by the kerb weight of the existing vehicle to preconfigured at least two predefined types and the maximum power of engine
The envelope of fitting and acquisition.
Second set component units 20, for according to the preset kerb weight, obtained from the second envelope with it is described
The upper limit value and lower limit value of the peak torque of the corresponding engine of preset kerb weight, and choose peak torque and be located at the upper limit
Engine between value and lower limit value forms the second alternative engine set；Wherein, second envelope is by preparatory
The kerb weight of existing vehicle and the peak torque of engine of at least two predefined types of configuration are fitted and obtain
Envelope.
Third set component units 30, for obtaining while being located at the described first alternative engine set and described second standby
The engine in motivation set is published, the alternative engine set of third is formed.
Matching unit 40, for choosing the peak torque phase with each engine in the alternative engine set of the third
Matched gearbox forms gearbox set.
Simulation unit 50, for in the alternative engine set of the third each engine and with the Engine Matching
Gearbox set in each gearbox carry out simulation calculation, determine to meet predetermined power index and/or predetermined economy
Property index engine-gearbox combination, complete power assembly matching.
Preferably, also referring to Figure 11, the power assembly coalignment 100 further include:
First screening unit 60 is used for according to preset oil consumption limit-discharge curve, to the alternative engine set of the third
In engine screened, obtain the engine that characteristic operating point fuel consumption values meet the oil consumption limit-discharge curve requirement, and
The alternative engine set of the third is updated to meet the engine of the oil consumption limit-discharge curve requirement.
Preferably, the power assembly coalignment 100 further include:
Second screening unit 70 is alternatively sent out for being required according to the arrangement of the vehicle to be designed from the third
In motivation set, the engine for meeting the arrangement requirement is filtered out, and the alternative engine set of the third is updated
For the engine for meeting the arrangement requirement.
In conclusion power assembly coalignment 100 provided in an embodiment of the present invention, the first set component units 10
And second set component units 20 are according to the kerb weight and pre-generated the first envelope and second of the vehicle to be designed
Envelope is obtained in one timing of kerb weight, the value range of maximum power and peak torque, so as to quick
Alternative engine set needed for obtaining, hereafter the matching unit 40 obtains and the engine in the alternative engine set
Matched gearbox, finally by the simulation calculation of simulation unit 50, predetermined power index and/or predetermined economic index
Engine-gearbox combination, completes the matching of power assembly.Since the power assembly configuration that the embodiment of the present invention generates is root
It is obtained according to objective data, on the one hand, avoid when being configured by experience, the too strong disadvantage of subjectivity；On the other hand, also
Matched efficiency can be improved, shorten the time of research and development, so as to carry out timing and comprehensive prediction to vehicle market, increase
Competitiveness when vehicle lists.
Above disclosed is only a preferred embodiment of the present invention, cannot limit the power of the present invention with this certainly
Sharp range, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and weighs according to the present invention
Benefit requires made equivalent variations, still belongs to the scope covered by the invention.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
Claims (10)
1. a kind of power assembly matching process characterized by comprising
According to the preset kerb weight of vehicle to be designed, hair corresponding with the preset kerb weight is obtained from the first envelope
The upper limit value and lower limit value of the maximum power of motivation, and maximum power is chosen between the upper limit value and the lower limit value
Engine forms the first alternative engine set；Wherein, first envelope is by pre- to preconfigured at least two
The kerb weight of existing vehicle and the maximum power of engine for determining type are fitted and the envelope that obtains；
According to the preset kerb weight, engine corresponding with the preset kerb weight is obtained from the second envelope most
The upper limit value and lower limit value of large torque, and engine of the peak torque between the upper limit value and lower limit value is chosen, it forms
Second alternative engine set；Wherein, second envelope is by showing to preconfigured at least two predefined types
The peak torque of the kerb weight and engine that have vehicle is fitted and the envelope that obtains；
The engine for obtaining while being located in the described first alternative engine set and the second alternative engine set, composition
The alternative engine set of third；
The gearbox to match with the peak torque of each engine in the alternative engine set of the third is chosen, composition becomes
Fast case set；
To in the alternative engine set of the third each engine and with it is every in the gearbox set of the Engine Matching
A gearbox carries out simulation calculation, determines the engine-speed change for meeting predetermined power index and/or predetermined economic index
Power assembly matching is completed in case combination.
2. power assembly matching process according to claim 1, which is characterized in that
First envelope includes the upper limit line and lower limit line on the first coordinate system；The horizontal axis table of first coordinate system
Showing the kerb weight of vehicle, and is indicated with x-axis, the longitudinal axis of first coordinate system indicates the maximum power of the engine of vehicle,
And it is indicated with y-axis；
The then upper limit value of the maximum power of engine corresponding with the preset kerb weight are as follows: in the upper limit line, horizontal seat
It is designated as the value of the ordinate of the point of the preset kerb weight；
The lower limit value of the maximum power of engine corresponding with the preset kerb weight are as follows: in the lower limit line, abscissa
For the value of the ordinate of the point of the preset kerb weight.
3. power assembly matching process according to claim 1, which is characterized in that
Second envelope includes the upper limit line and lower limit line on the second coordinate system；The horizontal axis table of second coordinate system
Showing the kerb weight of vehicle, and is indicated with x-axis, the longitudinal axis of second coordinate system indicates the peak torque of the engine of vehicle,
And it is indicated with y-axis；
The then upper limit value of the peak torque of engine corresponding with the preset kerb weight are as follows: in the upper limit line, horizontal seat
It is designated as the value of the ordinate of the point of the preset kerb weight；
The lower limit value of the peak torque of engine corresponding with the preset kerb weight are as follows: in the lower limit line, abscissa
For the value of the ordinate of the point of the preset kerb weight.
4. power assembly matching process according to claim 1, which is characterized in that the peak torque phase with the engine
Matched gearbox meets the first matching condition: Tt >=0.95Te, wherein Tt is the peak torque of gearbox, and Te is engine
Peak torque.
5. power assembly matching process according to claim 4, which is characterized in that the peak torque phase with the engine
Matched gearbox also meets the second matching condition: Tt≤1.25Te.
6. according to claim 1 to power assembly matching process described in 5 any one, which is characterized in that choose with it is described
The gearbox that the peak torque of each engine in the alternative engine set of third matches, before forming gearbox set,
Further include:
According to preset oil consumption limit-discharge curve, the engine in the alternative engine set of the third is screened, is obtained
Characteristic operating point fuel consumption values meet the engine of the oil consumption limit-discharge curve requirement, and by the alternative engine collection of the third
Close the engine for being updated to meet the oil consumption limit-discharge curve requirement.
7. according to claim 1 to power assembly matching process described in 5 any one, which is characterized in that choose with it is described
The gearbox that the peak torque of each engine in the alternative engine set of third matches, before forming gearbox set,
Further include:
It is required according to the arrangement of the vehicle to be designed, from the alternative engine set of the third, filters out and meet institute
The engine of arrangement requirement is stated, and is updated to the alternative engine set of the third to meet the arrangement requirement
Engine.
8. a kind of power assembly coalignment characterized by comprising
First set component units, for the preset kerb weight according to vehicle to be designed, acquisition and institute from the first envelope
The upper limit value and lower limit value of the maximum power of the corresponding engine of preset kerb weight are stated, and chooses maximum power and is located on described
Engine between limit value and the lower limit value forms the first alternative engine set；Wherein, first envelope is to pass through
The kerb weight of existing vehicle and the maximum power of engine of preconfigured at least two predefined types are fitted and
The envelope of acquisition；
Second set component units, for according to the preset kerb weight, obtained from the second envelope with it is described preset whole
The upper limit value and lower limit value of the peak torque of the standby corresponding engine of quality, and choose peak torque and be located at the upper limit value under
Engine between limit value forms the second alternative engine set；Wherein, second envelope is by preconfigured
The kerb weight of existing vehicle and the peak torque of engine of at least two predefined types are fitted and the envelope that obtains；
Third set component units, for obtaining while alternatively starting positioned at the described first alternative engine set and described second
Engine in machine set forms the alternative engine set of third；
Matching unit, the peak torque for choosing with each engine in the third alternative engine set match
Gearbox forms gearbox set；
Simulation unit, for in the alternative engine set of the third each engine and with the speed change of the Engine Matching
Each gearbox in case set carries out simulation calculation, determines to meet predetermined power index and/or predetermined economic index
Engine-gearbox combination, complete power assembly matching.
9. power assembly coalignment according to claim 8, which is characterized in that further include:
First screening unit is used for according to preset oil consumption limit-discharge curve, to the hair in the alternative engine set of the third
Motivation is screened, and obtains the engine that characteristic operating point fuel consumption values meet the oil consumption limit-discharge curve requirement, and will be described
The alternative engine set of third is updated to meet the engine of the oil consumption limit-discharge curve requirement.
10. power assembly coalignment according to claim 8, which is characterized in that further include:
Second screening unit, for being required according to the arrangement of the vehicle to be designed, from the alternative engine collection of the third
In conjunction, the engine for meeting the arrangement requirement is filtered out, and the alternative engine set of the third is updated to meet
The engine that the arrangement requires.
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| CN111775694A (en) * | 2020-07-09 | 2020-10-16 | 中国重汽集团成都王牌商用车有限公司 | Matching method for gearbox of commercial vehicle |
| CN114063462A (en) * | 2020-07-31 | 2022-02-18 | 陕西重型汽车有限公司 | Power configuration development method and device meeting emission control of whole vehicle and electronic equipment |
| CN112009271A (en) * | 2020-08-19 | 2020-12-01 | 恒大新能源汽车投资控股集团有限公司 | Power distribution method and device for four-wheel drive electric vehicle |
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