CN113268836A - Structural topology conversion method from coaxial arrangement transmission configuration to parallel shaft arrangement - Google Patents
Structural topology conversion method from coaxial arrangement transmission configuration to parallel shaft arrangement Download PDFInfo
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Abstract
The invention discloses a structural topology conversion method from a coaxially arranged transmission configuration to a parallel shaft arrangement, which comprises the following steps: classifying and coding all component shafting in the coaxial arrangement transmission configuration scheme; defining a structural matrix G and a shifting element matrix H of the coaxially arranged transmission; and combining the two shafting sub-matrixes obtained by structural topology conversion with all the newly added fixed-shaft gear sets, and combining the two shafting sub-matrixes with the newly added fixed-shaft gear sets to obtain a shifting element matrix finally, namely the structural matrix and the shifting element matrix of the converted parallel-shaft arrangement transmission configuration scheme. The method can convert a coaxially-arranged transmission configuration scheme with any structural type into a transmission configuration scheme with parallel shafts on the premise of not changing gears or working modes of the transmission configuration scheme, and can be further expanded to a transmission configuration scheme with more than three shafts (including three shafts).
Description
Technical Field
The invention relates to the field of transmissions, in particular to a structural topology conversion method from a coaxially-arranged transmission configuration to a parallel-shaft arrangement.
Background
Electromotion is one of four revolution directions of the global automobile industry. A technical route diagram (2.0 version) of energy-saving and new energy automobiles plans that in 2035 years, a traditional energy passenger car realizes 100% hybrid movement. The multi-gear (mode) transmission is the most core part of a hybrid electric vehicle and is also an important technical way for further improving the dynamic property and the economical efficiency of a pure electric vehicle. The transmission system of the hybrid electric vehicle is provided with a plurality of power sources, 1-2 motors are additionally arranged to realize a plurality of working modes such as a pure electric mode and a hybrid mode besides an internal combustion engine, and a plurality of gears can be arranged in each working mode. The traditional multi-gear (mode) transmission system adopts coaxial arrangement, and the introduction of the motor makes the space arrangement difficult, especially the axial dimension. If a parallel shaft arrangement is employed, distributing multiple power sources, gear sets and shift elements among multiple parallel shafts, the axial dimension of the transmission assembly can be reduced. In the existing special hybrid transmission configuration scheme, the hybrid transmission configuration i-MMD developed by Honda, the hybrid transmission configuration Voltec developed by general companies and the hybrid transmission configuration EDU developed by Shanghai company continue the coaxial arrangement mode of the traditional transmission, all power sources are coaxially arranged, and the axial size is large. However, the series-parallel hybrid transmission configuration scheme G-MC developed by the broad-spectrum corporation was originally proposed to arrange the double motors in parallel, and when the yota corporation also develops the fourth-generation hybrid transmission THS IV, the configuration scheme that the coaxial arrangement type adopted in the former three-generation hybrid configuration scheme is abandoned and the double-motor parallel-shaft arrangement type is adopted, and the newly-released lemon hybrid in great wall is also adopted and the double-motor parallel-shaft arrangement type, so that the shorter axial dimension is obtained. It is seen that the parallel shaft arrangement has become a mainstream structure of the special transmission configuration for the hybrid electric vehicle. For the coaxial type transmission used by the traditional energy automobile, mature configuration schemes are integrated and optimized, related algorithms are provided, and more coaxial arrangement transmission configuration schemes are disclosed. For the configuration scheme of the special hybrid transmission, the existing few reserve schemes are available, and the few configuration schemes are in patent protection and technical monopoly. Therefore, it is important to provide a topology conversion method for changing the coaxial transmission configuration scheme into the parallel shaft transmission configuration scheme.
Disclosure of Invention
The invention aims to provide a topological conversion method of a transmission configuration scheme between coaxial arrangement and parallel shaft arrangement, which can convert the coaxially arranged transmission configuration scheme with any structural type into the parallel shaft arranged transmission configuration scheme on the premise of not changing the gear or working mode of the configuration scheme, and can be further expanded to the transmission configuration scheme with more than three shafts (including three shafts) according to the method.
In order to achieve the above object, the present invention provides a method for converting a coaxially arranged transmission configuration into a parallel shaft arranged structural topology, comprising the steps of:
the method comprises the following steps: classifying and coding all component shafting in the coaxial arrangement transmission configuration scheme;
step two: a structural matrix G and a shifting element matrix H defining a coaxially arranged transmission configuration scheme;
step three: screening two types of planet rows respectively comprising an input shaft and an output shaft from a structural matrix G of the coaxial arrangement transmission configuration scheme, wherein all shaft system sub-matrixes of the two types of planet rows are respectively marked as w1 and w2 and are formed by elements of corresponding columns of the screened planet rows in the structural matrix G;
step four: classifying the rest planet rows; firstly, judging the condition that the planet row has a common axis with two axis systems w1 and w2, and expanding the planet row into an axis system sub-matrix with the most common axis; if the number of the common shafts is the same, detecting the condition that the gear shifting elements connect the planet row with the shaft system, and expanding the planet row into the shaft system with the most connected gear shifting elements; once the number of the planet rows in one shafting reaches or even exceeds half of the number, the rest planet rows are expanded into the other shafting;
step five: detecting whether the two classified shafting have a common shaft, correcting the code of a shafting w1, and adding a design of a fixed-shaft gear set in the configuration of the transmission; if the common axis U exists, the code of the common axis U in the sub-matrix w2 is kept unchanged, the code of the common axis U in the sub-matrix w1 is replaced by P (= Seq + 1), and the maximum code Seq is updated to P; then, a pair of dead axle gear sets is added, the sun gear shaft code of the dead axle gear sets is U, the gear ring shaft code of the dead axle gear sets is P, and the planet carrier shaft code of the dead axle gear sets is 0; updating the change to two shafting and shift element matrices; if there are multiple common axes, repeat this step until all the common axis numbers are replaced;
step six: detecting whether the codes of the shafts at the two ends of the gear shifting element belong to the same shafting or not; if the two codes are not in the same axis system, selecting one code which is not input and is not output shaft code or the code with the least common shaft from the codes of the shafts at the two ends of the shifting element, replacing the code with P (= Seq + 1), and updating the maximum code Seq into P; then, a pair of fixed shaft gear sets is added, the sun gear shaft code of each fixed shaft gear set is U, the gear ring shaft code of each fixed shaft gear set is P, and the planet carrier shaft code of each fixed shaft gear set is 0, and the fixed shaft gear sets are used for connecting the original components and the shifting elements; updating the change to two shafting and shift element matrices; repeating this step until all shift elements are detected;
step seven: and combining the two shafting sub-matrixes finally obtained and all the newly added fixed-shaft gear sets, and combining the finally obtained shifting element matrixes, namely the structural matrix and the shifting element matrix of the parallel-shaft arrangement transmission configuration scheme.
Further, in the second step, the structural matrix G is:
wherein the content of the first and second substances,n St representing the code of the sun gear shaft of the t-th planet row,n At representing the coding of the ring gear shaft of the t-th planet carrier shaft,n Rt the code of the ring gear shaft of the t-th planetary row is indicated.
Further, in the second step, the shift element matrix H is:
wherein the content of the first and second substances,SE l1is shown aslCoding of an end shaft of a shift elementSE l2Is shown aslCoding of the other end shaft of the individual shifting elements.
The invention has the beneficial effects that:
1) the invention provides a topology conversion method from a coaxially-arranged transmission configuration to a parallel shaft arrangement, and a topology conversion method between two arrangement structures is not disclosed at present.
2) The technical scheme provided by the invention has universality and wider application range, and not only can be suitable for a special hybrid power transmission (also called a special hybrid transmission and a special hybrid transmission) of a hybrid electric vehicle, but also is suitable for a traditional coaxially-arranged multi-gear automatic transmission and a multi-gear automatic transmission of a pure electric vehicle.
3) For the configuration schemes of the special hybrid transmission structure, the existing few reserve schemes are available, and the few configuration schemes are in patent protection and technical monopoly. Thus, the present invention can be utilized to convert an existing coaxially arranged automatic transmission scheme of a conventional fuel powered vehicle into a parallel-axis arranged transmission configuration scheme.
Drawings
FIG. 1 is a schematic flow chart of a method for converting a coaxial transmission configuration to a parallel-axis transmission configuration.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The invention discloses a method for converting a coaxially-arranged transmission configuration into a parallel-shaft-arranged structural topology, which is shown in a figure 1.
The method comprises the following steps: all component shafting in the coaxial arrangement transmission configuration scheme is classified and encoded. The shafts of all components of the transmission are distinguished according to whether the shafts are connected with a shell, an input shaft, an output shaft, a motor, a brake (except the brake connected with the input shaft and the motor), or the shafts are connected with other conditions, and digital coding is sequentially carried out, wherein the rule is shown in table 1, x is the number of the motors, m is the number of the brakes, and Seq is the total number of the component shafts.
TABLE 1 classification of component shafting and its digital coding rules
Step two: a structural matrix G and a shifting element matrix H of the coaxially arranged transmission are defined.
The fixed-axis gears are unified into a planetary row in which the planetary carrier is a housing (shaft 0). Counting all the planetary rows of the gear mechanism of the transmission, which are labeled 1, 2, …, t in sequence, the structural matrix G of the transmission configuration scheme is:
where each column element represents the code for three basic elements of a certain planetary row, and each row element represents the code for the same type of element in a different planetary row, for example,n St representing the code of the sun gear shaft of the t-th planet row,n At representing the coding of the ring gear shaft of the t-th planet carrier shaft,n Rt the code of the ring gear shaft of the t-th planetary row is indicated. Any two rows of elements can be interchanged, or any two columns of elements can be interchanged, and the physical meaning of the structural matrix and the method are not influencedThe use of (1).
Each shifting element in the transmission can be defined in its structure by the coding of its two end shafts. The motor in the configuration scheme of the special hybrid transmission is equivalent to a brake, and is a gear shifting element with an end shaft as a shell. All the shifting elements of the transmission are counted, and are sequentially marked as 1, 2, …,lThen the shift element matrix H of this transmission configuration scheme is:
where each column of elements represents a code for a shaft connected to both ends of a certain shifting element, for example,SE l1is shown aslCoding of an end shaft of a shift elementSE l2Is shown aslThe other end shaft of each shifting element is coded, and the two shaft codes are not in sequence. Any two columns of elements can be interchanged without affecting the physical meaning of the shifting element matrix and the application of the method.
Step three: two types of planetary rows respectively comprising an input shaft and an output shaft are screened out from a structural matrix of a coaxial arrangement transmission configuration scheme, all shafting sub-matrixes of the two types of planetary rows are respectively marked as w1 and w2, and the two types of planetary rows are formed by elements of corresponding columns of the screened planetary rows in the structural matrix G.
Step four: the remaining planet rows are sorted. First, judging the planet row has a common axis with two axis systems w1 and w2, the planet row is expanded into the axis system sub-matrix with the most common axis. If the number of the common shafts is the same, the condition that the planetary row is connected with the shafting by the gear shifting elements is detected, and the planetary row is expanded into the shafting with the most connected gear shifting elements. Once the number of the planet rows in one shafting reaches or even exceeds half of the number, the rest planet rows are expanded into another shafting.
Step five: and detecting whether the two classified shafting have a common shaft, correcting the shafting w1 code, and adding a design of a fixed-shaft gear set in the transmission configuration. If the common axis U exists, the code of the common axis U in the sub-matrix w2 is kept unchanged, the code of the common axis U in the sub-matrix w1 is replaced by P (= Seq + 1), and then the maximum code Seq is also updated to P; then, a pair of fixed axis gear sets is added, with a sun gear shaft encoded as U, a ring gear shaft encoded as P, and a carrier shaft encoded as 0. This change is updated into both shafting and shift element matrices. If there are multiple common axes, the process is repeated until all the common axis numbers have been replaced.
Step six: and detecting whether the codes of the shafts at the two ends of the gear shifting element belong to the same shafting. If the two codes are not in the same shaft system, selecting one code which is not an input shaft code and is not an output shaft code or the code with the least common shaft from the codes of the shafts at the two ends of the shifting element, replacing the code with P (= Seq + 1), and then updating the maximum code Seq into P; then, a pair of fixed-axis gear sets with a sun gear shaft code of U, a ring gear shaft code of P and a planet carrier shaft code of 0 is added for connecting the original component and the shifting element. This change is updated into both shafting and shift element matrices. This step is repeated until all shifting elements have been detected.
Step seven: and combining the two shafting sub-matrixes finally obtained and all the newly added fixed-shaft gear sets, and combining the finally obtained shifting element matrix, namely the newly obtained structural matrix and the shifting element matrix of the parallel-shaft transmission configuration scheme, so that the structural topology conversion from the coaxial transmission configuration scheme to the parallel-shaft transmission configuration scheme is completed.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A method for converting a coaxially arranged transmission configuration to a parallel shaft arranged structural topology, comprising the steps of:
the method comprises the following steps: classifying and coding all component shafting in the coaxial arrangement transmission configuration scheme;
step two: a structural matrix G and a shifting element matrix H defining a coaxially arranged transmission configuration scheme;
step three: screening two types of planet rows respectively comprising an input shaft and an output shaft from a structural matrix G of the coaxial arrangement transmission configuration scheme, wherein all shaft system sub-matrixes of the two types of planet rows are respectively marked as w1 and w2 and are formed by elements of corresponding columns of the screened planet rows in the structural matrix G;
step four: classifying the rest planet rows; firstly, judging the condition that the planet row has a common axis with two axis systems w1 and w2, and expanding the planet row into an axis system sub-matrix with the most common axis; if the number of the common shafts is the same, detecting the condition that the gear shifting elements connect the planet row with the shaft system, and expanding the planet row into the shaft system with the most connected gear shifting elements; once the number of the planet rows in one shafting reaches or even exceeds half of the number, the rest planet rows are expanded into the other shafting;
step five: detecting whether the two classified shafting have a common shaft, correcting the code of a shafting w1, and adding a design of a fixed-shaft gear set in the configuration of the transmission; if the common axis U exists, the code of the common axis U in the sub-matrix w2 is kept unchanged, the code of the common axis U in the sub-matrix w1 is replaced by P (= Seq + 1), and then the maximum code Seq is updated to P; then, a pair of dead axle gear sets is added, the sun gear shaft code of the dead axle gear sets is U, the gear ring shaft code of the dead axle gear sets is P, and the planet carrier shaft code of the dead axle gear sets is 0; updating the change to two shafting and shift element matrices; if there are multiple common axes, repeat this step until all the common axis numbers are replaced;
step six: detecting whether the codes of the shafts at the two ends of the gear shifting element belong to the same shafting or not; if the two codes are not in the same axis system, selecting one code which is not an input shaft code and is not an output shaft code or the code with the least common shaft from the codes of the shafts at the two ends of the shifting element, replacing the code with P (= Seq + 1), and then updating the maximum code Seq into P; then, a pair of fixed shaft gear sets is added, the sun gear shaft code of each fixed shaft gear set is U, the gear ring shaft code of each fixed shaft gear set is P, and the planet carrier shaft code of each fixed shaft gear set is 0, and the fixed shaft gear sets are used for connecting the original components and the shifting elements; updating the change to two shafting and shift element matrices; repeating this step until all shift elements are detected;
step seven: and combining the two shafting sub-matrixes finally obtained and all the newly added fixed-shaft gear sets, and combining the finally obtained shifting element matrixes, namely the structural matrix and the shifting element matrix of the parallel-shaft arrangement transmission configuration scheme.
2. The method according to claim 1, wherein in the second step, the structural matrix G is:
wherein the content of the first and second substances,n St is shown astThe coding of the sun gear shafts of the individual planet rows,n At is shown astThe coding of the ring gear shaft of the individual planet carrier shaft,n Rt is shown astCoding of the ring gear shafts of the individual planet rows.
3. The method according to claim 1, characterized in that in step two, the shifting element matrix H is:
wherein the content of the first and second substances, SE l1is shown aslCoding of an end shaft of a shift elementSE l2Is shown aslCoding of the other end shaft of the individual shifting elements.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114970050A (en) * | 2022-07-26 | 2022-08-30 | 北京航空航天大学 | Matrix-based vehicle planetary transmission device configuration design method |
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| US20160017933A1 (en) * | 2014-07-16 | 2016-01-21 | Ford Global Technologies, Llc | Method of controlling a transmission having an impeller clutch |
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