A kind of driving charge control method of parallel hybrid electric
Technical field
The application relates to hybrid vehicle charging control field, particularly a kind of driving charge control method of parallel hybrid electric.
Background technology
The parallel connection motor vehicle driven by mixed power as the SOC of its battery (Stage of Charge, state-of-charge) when being lower than preset threshold, will charge with certain torque or power, and SOC is maintained in the reasonable range.When SOC was low, if vehicle is in driving condition, the outputting power of driving engine not only will satisfy the driving demand, also will carry out charging to a certain degree to battery, otherwise SOC is low excessively, can't satisfy the power-assisted demand.
Existing hybrid vehicle charging strategy; Utilize engine speed to demarcate the charging torque; Control method is fairly simple; But engine efficiency and dynamo efficiency are not taken into full account into the tactful influence of charging, certain negative effect is all arranged for the reasonableness of process of charging and the efficient of hybrid power system.For the better charging torque of control hybrid vehicle when driving, improve the reasonableness and the hybrid power system efficient of process of charging, the protection electrokinetic cell needs charge control method better.
Summary of the invention
The application's technical matters to be solved provides a kind of charge control method; Come to control better the charging torque of hybrid vehicle when driving; Improve the reasonableness and the hybrid power system efficient of process of charging, under the prerequisite of guaranteeing cell safety, car load dynamic property, to reduce fuel oil consumption.
A kind of driving charge control method of parallel hybrid electric, this method comprises:
Obtain driving engine and the electrical generator expectation economy generating torque interval value under current rotating speed separately respectively;
Calculate the difference of target SOC (Stage of Charge, state-of-charge) and current SOC, obtain the cooresponding minimum generating torque interval value of factor of proportionality and said SOC difference;
According to said driving engine and electrical generator the expectation economy generating torque interval value under the current rotating speed separately and said minimum generating torque interval value obtain the comprehensive electric generating torque on dividing value and floor value, and calculate the last dividing value of said comprehensive electric generating torque and the difference between the floor value;
According to the torque of finally being charged of the last dividing value of said factor of proportionality, said comprehensive electric generating torque floor value and said comprehensive electric generating torque and floor value difference;
Charge with said final charging torque and to make said SOC be controlled in the preset range.
Said method, preferably, said acquisition generating torque interval value comprises last dividing value and the floor value that obtains generating torque interval.
Said method, preferably, the expectation economy generating torque interval value under the current rotating speed of said acquisition driving engine comprises:
Obtain dividing value and floor value in demand torque and the economic torque under the current rotating speed of driving engine of chaufeur respectively;
The economic torque upper bound value that said demand torque is deducted under the current rotating speed of said driving engine obtains the interval floor value of expectation economy generating torque under the current rotating speed of driving engine, and the interval floor value of economic torque that said demand torque is deducted under the current rotating speed of said driving engine obtains the interval last dividing value of expectation economy generating torque under the current rotating speed of driving engine;
Obtain the economic torque interval value of expectation under the current rotating speed of said driving engine.
Said method, preferably, dividing value and floor value comprise in the economic torque under the current rotating speed of said acquisition driving engine:
Demarcate the relation of dividing value in the economic torque of engine speed and driving engine and the relation of engine speed and the economic torque floor value of driving engine in advance;
Obtain the last dividing value of the economic torque under the present engine rotating speed according to the relation of dividing value in current engine speed and said engine speed and the economic torque of driving engine; Obtain the floor value of the economic torque under the present engine rotating speed according to the relation of current engine speed and said engine speed and the economic torque floor value of driving engine.
Said method, preferably, the expectation economy generating torque interval value under the current rotating speed of said acquisition electrical generator comprises:
Demarcate the relation of dividing value in the economic torque of generator speed and electrical generator and the relation of generator speed and the economic torque floor value of electrical generator in advance;
Relation based on dividing value in current generator speed and said generator speed and the economic torque of generator obtains dividing value in the expectation economy generating torque under the current generator speed; Relation based on current generator speed and said generator speed and the economic torque floor value of generator obtains the expectation economy generating torque floor value under the current generator speed;
Obtain the interval value of the expectation economy generating torque under the said current generator speed.
Said method, preferably, the cooresponding minimum generating torque interval value of said SOC difference comprises:
Demarcate the relation of dividing value in SOC difference and the minimum generating torque and the relation of SOC difference and the minimum torque floor value of generating electricity in advance;
The relation of dividing value obtains dividing value in the minimum generating torque under the current SOC difference in the difference of based target SOC and current SOC and said SOC difference and the minimum generating torque; The relation of the difference of based target SOC and current SOC and said SOC difference and minimum generating torque floor value obtains the minimum generating torque floor value under the current SOC difference;
Obtain the cooresponding minimum generating torque interval value of said SOC difference.
Said method, preferably, the last dividing value and the floor value of the torque of said acquisition comprehensive electric generating comprise:
Select in the economic torque of expectation under the current rotating speed of said driving engine in the economic torque of expectation under dividing value, the current rotating speed of said electrical generator that the smaller value in the dividing value is a dividing value in the said comprehensive electric generating torque on the dividing value and the cooresponding minimum generating torque of said SOC difference;
Selecting the higher value in the cooresponding minimum generating torque floor value of the economic torque floor value of expectation, the economic torque floor value of expectation under the current rotating speed of said electrical generator and said SOC difference under the current rotating speed of said driving engine is said comprehensive electric generating torque floor value.
Said method, preferably, said factor of proportionality is according to the relation acquisition of the difference of target SOC and current SOC and SOC difference of demarcating in advance and factor of proportionality.
Said method, preferably, the torque of finally being charged of said difference according to dividing value and floor value in said factor of proportionality, said comprehensive electric generating torque floor value and the said comprehensive electric generating torque comprises:
Said final charging torque is the summation of the above comprehensive electric generating torque floor value of MAD of difference and the said factor of proportionality of dividing value and floor value in the said comprehensive electric generating torque.
The present invention also provides a kind of driving battery charge controller of parallel hybrid electric, comprising:
Be connected with automobile current generator, driving engine, electrokinetic cell, obtain the data acquisition module of current generator speed, final charging torque that the present engine rotating speed is relevant with current SOC numerical value;
Be connected with said data acquisition module, receive the said final charging torque that data acquisition module sends, and charge based on said final charging torque and to make said SOC be controlled at the control Executive Module in the preset range.
Said apparatus, preferably, said data acquisition module comprises:
Obtain first of current generator speed, present engine rotating speed and current SOC and obtain submodule;
Be connected with the said submodule that obtains; Receive and saidly obtain the data that submodule sends, and calculate obtain that the expectation economy generating torque down of the current rotating speed of driving engine is interval, the expectation economy generating torque down of the current rotating speed of electrical generator is interval, target SOC and cooresponding factor of proportionality of current SOC difference and cooresponding minimum thereof second of the torque interval of generating electricity obtains submodule;
Obtain submodule and be connected with said second, receive said second and obtain submodule and calculate the data that obtain, and compare to calculate and obtain the 3rd of final generating torque and obtain submodule.
Beneficial effect of the present invention is; Considered the factors such as SOC of engine efficiency, dynamo efficiency, current electrokinetic cell fully, and its data are put into the calculating of final charging torque, the charging torque of final output makes driving engine and the electrical generator be operated in the higher zone of efficient; Thereby better control the charging torque of hybrid vehicle when driving; Improve the reasonableness and the hybrid vehicle efficient of process of charging, protect electrokinetic cell, improved the economy of motor vehicle driven by mixed power.
Certainly, arbitrary product of embodiment of the present invention might not reach above-described all advantages simultaneously.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the application embodiment; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiment of the application, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the diagram of circuit of the driving charge control method embodiment one of a kind of parallel hybrid electric provided by the invention;
Fig. 2 is for obtaining a kind of diagram of circuit of the expectation economy generating torque interval value under driving engine and the current rotating speed of electrical generator respectively among the driving charge control method embodiment two of a kind of parallel hybrid electric provided by the invention;
Fig. 3 is for obtaining the another kind of diagram of circuit of the expectation economy generating torque interval value under driving engine and the current rotating speed of electrical generator respectively among the driving charge control method embodiment two of a kind of parallel hybrid electric provided by the invention;
Fig. 4 is for obtaining the diagram of circuit of dividing value and floor value on the economic torque interval under the current rotating speed of driving engine among the driving charge control method embodiment two of a kind of parallel hybrid electric provided by the invention;
Fig. 5 is for obtaining the diagram of circuit of the economic torque interval value under the current rotating speed of electrical generator among the driving charge control method embodiment two of a kind of parallel hybrid electric provided by the invention;
Fig. 6 is for obtaining the diagram of circuit of the cooresponding minimum generating torque interval value of said SOC difference among the driving charge control method embodiment two of a kind of parallel hybrid electric provided by the invention;
Fig. 7 is the structural representation of the driving battery charge controller embodiment three of a kind of parallel hybrid electric provided by the invention;
Fig. 8 is the structural representation of the driving battery charge controller embodiment four of a kind of parallel hybrid electric provided by the invention.
The specific embodiment
To combine the accompanying drawing among the application embodiment below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the application's part embodiment, rather than whole embodiment.Based on the embodiment among the application, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the application's protection.
Embodiment one
When the information such as state of vehicle control device identification vehicle power battery SOC, judge current vehicle and get into while driving behind the electrically-charged mode of operation, as shown in Figure 1, the charge control method of the embodiment of the invention one comprises:
Step 101: obtain driving engine and the electrical generator expectation economy generating torque interval value under current rotating speed separately respectively;
Step 102: calculate the difference of target SOC (Stage of Charge, state-of-charge) and current SOC, obtain the cooresponding minimum generating torque interval value of factor of proportionality and said SOC difference;
Step 103: according to said driving engine and electrical generator the expectation economy generating torque interval value under the current rotating speed separately and said minimum generating torque interval value obtain the comprehensive electric generating torque on dividing value and floor value, and calculate the last dividing value of said comprehensive electric generating torque and the difference between the floor value;
Step 104: according to the torque of finally being charged of the last dividing value of said factor of proportionality, said comprehensive electric generating torque floor value and said comprehensive electric generating torque and floor value difference;
Step 105: charging with said final charging torque makes said SOC be controlled in the preset range.
Wherein, said acquisition generating torque interval value comprises last dividing value and the floor value that obtains generating torque interval.
In sum; A kind of driving charge control method embodiment one beneficial effect provided by the invention is; Considered factors such as engine efficiency, dynamo efficiency and SOC fully, and its data are put into the calculating of charging torque, the charging torque of final output makes driving engine and electrical generator be operated in the higher zone of efficient; The better charging torque of control hybrid vehicle when driving; Improve the reasonableness and the hybrid vehicle efficient of process of charging, protect electrokinetic cell, improved the economy of motor vehicle driven by mixed power.
Embodiment two
Information such as state when vehicle control device identification vehicle power battery SOC; Judging current vehicle gets into while driving behind the electrically-charged mode of operation; As shown in Figure 1; The charge control method of the embodiment of the invention two is based on to be set up on the basis of embodiment one, and wherein, step 101 as shown in Figure 2 comprises:
Step 201: obtain dividing value and floor value in demand torque and the economic torque under the current rotating speed of driving engine of chaufeur respectively; Wherein, Look into the demand torque that three-dimensional table obtains said chaufeur according to current throttle opening and engine speed, said three-dimensional table is obtained by rating test;
Step 202: the economic torque upper bound value that said demand torque is deducted under the current rotating speed of said driving engine obtains the interval floor value of expectation economy generating torque under the current rotating speed of driving engine, and the interval floor value of economic torque that said demand torque is deducted under the current rotating speed of said driving engine obtains the interval last dividing value of expectation economy generating torque under the current rotating speed of driving engine;
Step 203: obtain the economic torque interval value of expectation under the current rotating speed of said driving engine;
Step 204:, obtain the interval value of the expectation economy generating torque under the current generator speed according to current generator speed.
Wherein, step 201-step 203 can with step 204 replacing order, promptly can first execution in step 204, as shown in Figure 3.
With reference to shown in Figure 4, dividing value and floor value comprise in the economic torque under the current rotating speed of the said acquisition driving engine of step 202:
Step 401: demarcate the relation of dividing value in the economic torque of engine speed and driving engine and the relation of engine speed and the economic torque floor value of driving engine in advance;
Step 402: the last dividing value that obtains the economic torque under the present engine rotating speed according to the relation of dividing value in current engine speed and said engine speed and the economic torque of driving engine; Obtain the floor value of the economic torque under the present engine rotating speed according to the relation of current engine speed and said engine speed and the economic torque floor value of driving engine.
With reference to shown in Figure 5, the expectation economy generating torque interval value under the current rotating speed of the said acquisition electrical generator of step 204 comprises:
Step 501: demarcate the relation of dividing value in the economic torque of generator speed and electrical generator and the relation of generator speed and the economic torque floor value of electrical generator in advance;
Step 502: the relation based on dividing value in current generator speed and said generator speed and the economic torque of generator obtains dividing value in the expectation economy generating torque under the current generator speed; Relation based on current generator speed and said generator speed and the economic torque floor value of generator obtains the expectation economy generating torque floor value under the current generator speed;
Step 503: the interval value that obtains the expectation economy generating torque under the said current generator speed.
In the embodiment of the invention two, with reference to shown in Figure 6, the cooresponding minimum generating torque interval value of the said SOC difference in the step 102 comprises:
Step 601: step is demarcated the relation of dividing value in SOC difference and the minimum generating torque and the relation of SOC difference and the minimum torque floor value of generating electricity in advance;
Step 602: the relation according to dividing value in the difference of target SOC and current SOC and said SOC difference and the minimum generating torque obtains dividing value in the minimum generating torque under the current SOC difference; Obtain the minimum generating torque floor value under the current SOC difference according to the difference of target SOC and current SOC and the relation of said SOC difference and minimum generating torque floor value;
Step 603: obtain the cooresponding minimum generating torque interval value of said SOC difference.
Factor of proportionality in the step 102 comprises:
Said factor of proportionality is according to the relation acquisition of the difference of target SOC and current SOC and SOC difference of demarcating in advance and factor of proportionality.
And dividing value is for selecting in dividing value in the economic torque of expectation down of the current rotating speed of said driving engine, the economic torque of expectation down of the current rotating speed of said electrical generator the smaller value in the dividing value on the dividing value and the cooresponding minimum generating torque of said SOC difference in the torque of comprehensive electric generating described in the step 103, and the floor value of said comprehensive electric generating torque is the higher value in the torque floor value that generates electricity of the economic torque floor value of expectation and the cooresponding minimum of said SOC difference under the economic torque floor value of the expectation under the current rotating speed of said driving engine, the current rotating speed of said electrical generator.
The value of final charging torque described in the step 104 is the summation of the above comprehensive electric generating torque floor value of MAD of difference and the said factor of proportionality of dividing value and floor value in the said comprehensive electric generating torque.
In sum; A kind of driving charge control method embodiment two beneficial effects provided by the invention are; Engine efficiency, dynamo efficiency and factors such as target SOC and current SOC are considered in the charging control, and its data are incorporated in the calculating of said final charging torque that the charging torque of final output makes driving engine and electrical generator be operated in the higher zone of efficient; The better charging torque of control hybrid vehicle when driving; Improve the reasonableness and the hybrid vehicle efficient of process of charging, protect electrokinetic cell, improved the economy of motor vehicle driven by mixed power.
Embodiment three
As shown in Figure 7, the invention provides a kind of driving battery charge controller embodiment three of parallel hybrid electric, be applicable to driving charge control method provided by the invention, comprise data acquisition module 701 and control and executive module 702, wherein:
Data acquisition module 701 is connected with automobile current generator, driving engine, electrokinetic cell, obtains current generator speed, final charging torque that the present engine rotating speed is relevant with current SOC numerical value;
Control Executive Module 702 is connected with said data acquisition module, receives the said final charging torque of data acquisition module transmission, and charges based on said final charging torque and to make said SOC be controlled in the preset range.
Can know through the foregoing description; Driving battery charge controller embodiment three provided by the invention; Be used for parallel hybrid electric, can factor data values such as engine efficiency, dynamo efficiency, current SOC and target SOC be incorporated in the calculating of final charging torque through data acquisition module 701, and vehicle is charged according to said final charging torque through control and executive module 702 SOC is controlled in the preset range through this device embodiment; Thereby control the charging torque of hybrid vehicle when driving better; Improve the reasonableness and the hybrid vehicle efficient of process of charging, protection electrokinetic cell, the economy of raising motor vehicle driven by mixed power.
Embodiment four
As shown in Figure 8; The driving battery charge controller embodiment four that the invention provides a kind of parallel hybrid electric is based on the embodiment of the invention three; Comprise data acquisition module 701 and control and executive module 702; Wherein control and executive module 702 is with consistent described in the embodiment three, and data acquisition module 701 comprises that first obtains submodule 711, second and obtain submodule 712 and the 3rd and obtain submodule 713, wherein:
First obtains submodule 711 obtains current generator speed, present engine rotating speed and current electrokinetic cell SOC;
Second obtains submodule 712 is connected with the said submodule that obtains; Receive the said data of obtaining the submodule transmission, and calculate expectation economy generating torque interval, expectation economy generating torque interval, target SOC and the cooresponding factor of proportionality of current SOC difference under the current rotating speed of electrical generator and the cooresponding minimum generating torque interval thereof that obtains under the current rotating speed of driving engine;
The 3rd obtains submodule 713 and said second obtains submodule and is connected, and receives said second and obtains submodule and calculate the data that obtain, and compare to calculate and obtain final generating torque.
Can know through the foregoing description; Driving battery charge controller embodiment four provided by the invention; Be used for parallel hybrid electric; Can obtain submodule through first in the data acquisition module through this device embodiment and obtain data such as current generator speed, engine speed and current SOC, obtain through second that submodule calculate to obtain factor of proportionality and the cooresponding minimum generating torque of SOC difference is interval, and send the data to the 3rd and obtain finally the generate electricity calculating of torque of submodule; Thus factor data values such as engine efficiency, dynamo efficiency, current SOC and target SOC are incorporated in the calculating of final charging torque; And vehicle is charged according to said final charging torque through control and executive module SOC is controlled in the preset range, thereby control the charging torque of hybrid vehicle when driving better, improve the reasonableness and the hybrid vehicle efficient of process of charging; The protection electrokinetic cell, the economy of raising motor vehicle driven by mixed power.Charge with final charging torque and to make SOC maintain in the preset range.
More than a kind of driving charge control method provided by the present invention and device are described in detail; Used specific case herein the application's principle and embodiment are set forth, the explanation of above embodiment just is used to help to understand the application's method and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to the application's thought, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as the restriction to the application.