• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    method of operation for a hybrid drive of a vehicle and vehicle, especially commercial vehicle. the invention relates to an operating method for a hybrid drive of a motor vehicle, especially a range-extender vehicle or a plug-in hybrid vehicle, which can be operated with various modes of operation. the invention especially concerns an operating method for selecting optimal operating modes of the hybrid drive along a driving route. the method of operation comprises the steps of dividing a driving route into a sequence of track segments; determine at least one objective variable predicted for each of the hybrid drive operating modes on each road segment along the driving route; determine an ideal route for the driving route, where a route is a sequence of operating modes along the driving route, such that each road segment is assigned an operating mode and the ideal route is the one that has an ideal value for at least one objective variable.
    公开号:BR102014014713B1
    申请号:R102014014713-6
    申请日:2014-06-16
    公开日:2022-01-11
    发明作者:Andreas Geser；Dr. Stefan Kerschl；Götz Von Esebeck
    申请人:Man Truck & Bus Ag；
    IPC主号:
    专利说明:

    [0001] The invention concerns a method of operation for a hybrid drive of a motor vehicle, especially a range-extender vehicle or a plug-in hybrid vehicle, which can be operated with various modes of operation. The invention especially concerns an operating method for selecting optimal operating modes of the hybrid drive along a driving route.
    [0002] So-called plug-in hybrid vehicles and range-externer vehicles are currently being strongly developed. These vehicles have at least two energy converters, usually an internal combustion engine and an electrical machine (Emachine), as well as two energy accumulators, often a fuel tank and an energy accumulator for electrical energy, such as a battery. The energy accumulator for electrical energy can be charged via the power grid. Vehicles of this nature can be driven for longer distances with electric power alone or in a hybrid way, therefore, in different driving modes. Typical driving modes are purely electric operation, in which traction energy is provided exclusively by the battery and is converted by the electric machine. Another operating mode is hybrid operation, in which the vehicle is mainly operated by the internal combustion engine - powered by the fuel tank - and the electric motor and battery contribute to increasing efficiency through different hybrid functions, such as recovery, change in load point, etc. Another possible mode of operation is, for example, to charge the battery via the internal combustion engine.
    [0003] One difficulty consists in having to choose the operating modes in the driving operation, in such a way that a better optimal operation is possible along the entire driving path. The most optimal possible driving operation could be one that generates, for example, minimum driving costs, that minimizes CO2 emissions and/or that enables driving as long as possible in electric mode or electric driving in certain regions, for example, in inland cities. Generally, the driver cannot choose the operating modes optimally, in order to achieve the aforementioned objectives, since the necessary information is not available to him or it would be too complex for him to process it.
    [0004] From document DE 198 31 487 C1, a method for operating a serial hybrid drive is known, which takes into account short, medium and long-term influences of traffic information on the operating strategy, in order to make the ideal mode of operation of the hybrid vehicle. It is suggested to determine a preferred drive type or power source based on a performance profile for individual segments. However, the disadvantage of the method described is that considering the road segments in isolation does not make it possible to determine the ideal sequence of operating modes for the entire profile of a driving route, since the type of drive with the best apparent performance profile for a specific segment, taking into account the entire profile of the driving segment, does not necessarily represent the ideal choice for this segment of road.
    [0005] A task of the invention is to provide a method of operation for a hybrid drive of a motor vehicle, which drive can be operated with various modes of operation, with the method avoiding the disadvantages of conventional methods of operation. The method of operation must in particular enable a selection of optimal operating modes of the hybrid drive along a driving route.
    [0006] These tasks are respectively solved by means of an operation method for a hybrid drive with the characteristics of the main claim. Advantageous embodiments and applications of the invention are the subject of the dependent claims and will be explained in more detail in the following description, with partial reference to the figures.
    [0007] According to the invention, an operating method is suggested for a hybrid drive of a vehicle, which drive can be operated with various modes of operation to drive the vehicle in the forward direction. A particularly outstanding use of the operating method according to the invention concerns a hybrid drive of a plug-in hybrid vehicle or a range-extender vehicle, where the method according to the invention, however, does not is limited to these types of hybrid vehicles, but can be used in any type of hybrid vehicle, which can be operated with various modes of operation. The method comprises the following steps: dividing a driving route into a sequence of lane segments ; determining at least one predicted objective variable for each of the various modes of operation of the hybrid drive on each road segment along the driving route; and determine an optimal path for the driving route.
    [0008] In this case, a route is understood to be a sequence of operating modes along the driving route, in such a way that each road segment is assigned one of several operating modes. In other words, a route is indicated in which purely electric driving, hybrid drive or battery charging via the internal combustion engine can be used successively along the driving route. The ideal path is one that has an ideal value for at least one objective variable. To determine the value of the objective variable of a route, especially the ideal route, the individual values of the objective variable for all the road segments along the route are preferably added. When comparing all courses related to the objective variable, that course has the ideal value for the objective variable, which has a maximum or minimum value for the objective variable.
    [0009] The use according to the invention, that is, dividing a predetermined driving route into different routes, in such a way that all possible sequences of operating mode are considered, in order to arrive, from the beginning , to the destination along the driving route, makes it possible to determine, by considering the entire profile of the driving route, the best possible sequence of operating modes for the predetermined objective variable.
    [0010] In this sense, through the pre-indication of a desired objective variable, the determination of the ideal modes of operation along the conduction route can be adjusted to the desired ideal target. A preferred example of an objective variable is driving-related costs, where the ideal route is the one whose operating mode sequence has the lowest driving-related costs for the driving route. Under this modality, the estimated driving costs for each operating mode are calculated or forecast for each road segment along the driving route. In this way, for each possible path, that is, sequence of operating modes to the . During the driving segment, a general estimate of the driving cost is calculated or, across all possible routes, the one in which the vehicle arrives at its destination at the optimal cost is selected. The current price of electrical energy required for this objective variable is provided or updated, when necessary, per kilowatt hour and the price of fuel is provided in advance per liter, for example, by introducing a correspondingly user-configured or automated navigation system. by remotely checking the data, which is provided by a server.
    [0011] With the present invention it is also possible, however, to optimize the selection of the different operating modes along the driving route according to other criteria and by specifying another objective variable. According to another variant, vehicle emissions, especially CO2 emissions, can be pre-indicated and therefore optimised. Other possible objective variables are loss of battery life and/or a period of time that is electrically driven along the route. The last one is an example for an objective variable, where the ideal path is the one that has a maximum value for the objective variable.
    [0012] According to a particularly preferred embodiment, the objective variable is a multidimensional objective variable, that is, the estimated values for several correspondingly different objective variables are determined for each of the hybrid drive operating modes and in each track segment along the driving route. According to this modality, the ideal path is then determined by means of a multi-criteria optimization (pareto-optimization), based on several objective variables. In other words, several sub-goals can be determined, e.g. optimizing driving costs, optimizing CO2 emissions and minimizing battery life depletion, and through weighting factors can be combined. into a common objective function, which is then optimized using conventional Pareto-optimization techniques to solve multicriteria path optimization problems.
    [0013] According to another aspect of the invention, the determination of an objective variable or several objective variables occurs depending on variables related to consumption. In order to improve prediction accuracy, variables can also be predicted for individual road segments.
    [0014] The determination of an objective variable can occur depending on a driving speed profile along the driving route, since the energy consumption or the objective variables mentioned above for the respective drive types essentially depend on the speed driving along the route. The driving speed profile can be predicted depending on a type of route, the speed limitation along a route segment and/or depending on a topographical profile, e.g. the slope or slope of a route segment . According to these variants, the operating method determines the estimated driving speed of the vehicle on each road segment.
    [0015] Another possibility for carrying out the invention provides to consider, additionally, the expected speed of a traffic flow in the individual road segments, using current or historical traffic related data, in order to continuously improve the speed profile prediction of driving along the driving route.
    [0016] Approaches for determining the estimated driving speed on a road segment along a pre-established driving route, as described above, are known from the prior art of navigation devices and do not need to be described. in more detail.
    [0017] Other variants specific to the vehicle and/or specific to the physical conditions surrounding the vehicle, which influence the objective variables, are considered. Examples for this are vehicle mass, drive train temperature, battery temperature, outside temperature and/or inside temperature. In this way, the energy demand for heating and the air conditioning system or other auxiliary consumptions can, for example, be determined depending on the external and internal temperature of the vehicle. The estimated energy demand required for auxiliary consumption along the driving route is no longer available as energy for the electric machine to drive in the forward direction of the vehicle. According to these modalities, such variables specific to the vehicle and/or specific to the environment surrounding the vehicle are predicted for the individual road segments, that is, they are estimated. As a result, the accuracy of determining optimal operating modes can be continuously improved.
    [0018] According to a preferred modality, the determination of at least one objective variable occurs depending on at least one mandatory condition. In this way, for example, a specific mode of operation can be pre-specified for one or more road segments, for example, if you are driving through a region along the driving route and through which you must drive in electric mode. (the so-called “Zero Emission Zone”). According to another advantageous variant of this embodiment, a determined threshold value, below which a battery charge state must be at the end of the driving route, can also be pre-estimated. As a result, it can be ensured, for example, that the battery is sufficiently discharged while driving, in order to be able to recharge it with regenerative electrical current after the journey or in order to positively influence the aging of the battery. A determined threshold value can also be pre-estimated, below which a battery charge state should be at the end of the driving route. As a result, electrical operation can be guaranteed when driving again, if there is no charging point at the end of the driving route and if the destination is in a Zero Emission Zone.
    [0019] Another advantageous modality provides that the determination of at least one objective variable occurs depending on external charging possibilities for the batteries along the driving route. In the case of an advantageous variant of this modality, stopping points along the ideal route for coupling regenerative electrical current are established and suggested to the conductor.
    [0020] In order to continuously improve the accuracy of determining the ideal sequence of operating modes, it is advantageous, after driving the vehicle through a road segment, to replace at least one objective variable predicted by the concrete value (current value) for the track segments already traveled and carry out the determination of the ideal route again. According to this variant, the predicted and relevant variables in terms of consumption for the road segments already traveled can be replaced by the concrete values (current values) for this variable, in order to calculate the concrete values of the objective variables.
    [0021] Another aspect of the invention concerns a vehicle, especially a commercial vehicle, with a hybrid drive, which is operated with a method according to the aspects described above.
    [0022] Other features and advantages of the invention will be described below with reference to the attached Figures, which show:
    [0023] Figure 1 is a flowchart of an operation method for selecting ideal modes of operation of the hybrid drive according to a modality;
    [0024] Figure 2 schematically, the distribution of roads into road segments and the calculation of objective variables according to each road segment for a single route;
    [0025] Figure 3 the calculation of expected objective variables and consumption variables using characterization maps; and
    [0026] Figure 4 schematically, the selection of an ideal path to determine an ideal sequence of operating modes.
    [0027] Figure 1 describes, by way of example, a possible flowchart for a method of operating a hybrid drive of a motor vehicle for selecting the operating modes along a driving route.
    [0028] In step S10, the driving destination is pre-specified, for example, by means of a user instruction on a navigation device.
    [0029] Therefore, in step S20 the driving route is calculated in a conventional way by means of a navigation device known from the state of the art.
    [0030] In step S30, the calculated driving route is divided into individual road segments. The length of the individual track segments can in principle be freely selected, being automatically chosen advantageously depending on the route. The distribution occurs, in this case, according to criteria, for example, which constitute the road segments with similar demands. One possibility is to divide the driving route according to segment types along the route, i.e. according to freeways, rural roads, urban roads, etc., so that a road segment, for example, starts or ends , then when a via type starts or ends. Alternatively or additionally, a distribution into road segments with different prescribed maximum speeds along the driving route can be selected. Information of this nature can be extracted from the cartographic data used in conventional navigation devices. Other criteria are advantageously considered when distributing the driving route in road segments, such as, for example, the presence of environmental protection zones or Zero Emission Zones, so that the pre-specification of mandatory conditions, which require a particular mode of operation, is facilitated.
    [0031] Basically, it is established that the calculation accuracy and the time required for calculation increase the shorter the individual road segments along the route are selected, so that the division into individual road segments is finally shown , as a compromise due to calculation time and predictability accuracy.
    [0032] The division into individual road segments is illustrated in the upper segment of Figure 2. In the greatly simplified representation, a driving route 2 is only subdivided into four individual road segments 3 as variable lengths, where in each road segment 3 is worth a different speed limit 9.
    [0033] After the distribution of the driving route 2 into individual road segments 3, in step S40 of Figure 1, the determination of the objective variable/variables for each road segment and operating mode occurs. This is illustrated in the lower segment of Figure 2.
    [0034] The hybrid drive unit has different operating modes 1 - here in the example, of course, three selectable operating modes 1 - for driving the vehicle in the forward direction: a first hybrid mode, in which the vehicle is essentially operated by the engine internal combustion engine powered by the fuel tank and the electric motor and battery contribute to increased efficiency through different hybrid functions such as e.g. recovery, load point change etc., a second purely electric mode, in which the traction energy is provided exclusively by the battery and is converted by the electric machine (machine E); and a “charge” mode, in which the battery is charged via the internal combustion engine.
    [0035] In the present modality, driving costs are optimized as objective variables. Driving costs per lane segment result from energy consumption 4 per lane segment 3, multiplied by the price per unit of energy. In the simplified representation of Figure 2, only the energy consumption is represented in l/km or kWh/100 km as an intermediate result.
    [0036] The values shown by way of example in the table of Figure 2 make it clear that, as a rule, the predicted values for energy consumption do not differ only for each operating mode, but are also predicted for a pre-defined operating mode. -estimated for each road segment. In this case, the expected energy consumption 4 does not only depend on the expected speed profile 9 within each lane segment 3, but also on other additional influencing factors. For this reason, other objective variables relevant to consumption are preferably considered in order to increase accuracy. These comprise, for example, different segment data, such as, for example, the type of segment (motorway, rural road, etc.) or topographical data of the segment, such as, for example, inclines and slopes. Additionally, information regarding the speed of traffic flow can still be considered. Furthermore, variables specific to speed or specific to the environment surrounding the car can be considered when calculating the objective variable/variables. These comprise, for example, the vehicle mass, the external temperature, the internal temperature, the drive train and battery temperature, the front surface and the air resistance coefficient.
    [0037] In this sense, the determination of the variable(s)/objective variables 7, as shown schematically in Figure 3, occurs based on lines or also on maps of characteristic values 11 stored, through which a corresponding value of the objective variables is assigned, for each operating mode 1, to the relevant variables in terms of consumption 10, for example, to the segment data, to the variable/variables specific to the vehicle and specific to the environment that surround the vehicle. According to a simple example, such feature maps could contain typical energy consumption values for certain road segments, a journey in a time zone 30 with a vehicle with mass equal to xx, for example, corresponds to yy kWh/ 100km in pure electric operation or to zz l/100km in hybrid operation.
    [0038] Depending on the objective variables 4 used according to the respective modality of the method of operation according to the invention, it is determined in advance which specific variables relevant to consumption 10 are used to calculate the expected objective variables 7. The functional context between these consumption-relevant variables 10 and the objective variables to be determined 7 is then stored in a vehicular store based on maps/feature lines 11, which were experimentally determined in advance, for example.
    [0039] As further illustrated in Figure 3, other variables relevant to consumption 10a, which are used to predict the objective variable/variables 7 for each road segment and for each operating mode 1, they can also be predicted, in an intermediate step, by means of corresponding feature maps/lines 11. These can, for example, be the battery charge state, cabin temperature or drive train temperature. As a result, the predictability accuracy for the objective variable(s) 7 can be further improved. For this purpose, external and additional charging possibilities can be considered, for example when estimating the battery's state of charge. These feature maps can be continuously improved, where consumption results in the drive operation are assumed for certain lanes in feature map 11. This corresponds to a self-learning procedure.
    [0040] In step S50, finally the total driving costs 7 resulting from consumption for the individual road segments are calculated for all routes. This is represented in Figure 4. Figure 4 shows all possible routes 5 along a predetermined driving route 2, where a route 5 is a sequence of operating modes 1 along driving route 2, from so that one of the operating modes 1 is assigned to each track segment 3. In the present embodiment with 3 different operating modes, this results in 3 options for a possible operating mode for each track segment.
    [0041] With increasing number of track segments, this results in a split growing tree structure in order to combinatorially map all possible sequences of operating modes 1 as a respective route 5. Depending on the selected operating mode 1, As a result, different energy consumption 4 and battery charge states arise, which are predicted for each track segment 3 depending on the operating mode 1.
    [0042] For each of these individual routes 5 an integer value of the objective variables 7 for the driving route 2 can be calculated as the sum of the objective variables 4 for each individual lane segment 3. The ideal route 6 is the one with extreme value for the objective variables 7. According to the simple example shown in Figure 4 with only one of the objective variables, with driving costs, the ideal route 6 is the one with the lowest value 8 for driving costs. The ideal path 6 is represented in Figure 4 with a thick dashed line. Optimization, however, preferably occurs through a multi-criteria optimization, as described above, using several objective variables. Optionally, a recommendation can be made to the driver to use an external charging possibility on the driving route.
    [0043] In step S60, the operating method establishes the respective operating mode according to the calculated sequence of operating modes of the ideal route for each road segment. In step S70, a continuous check is carried out if the driving destination has been reached. If yes, the operating method for selecting operating modes is terminated. If not, the intermediate results predicted for the lane 3 segments already traveled by the vehicle are replaced by concrete variables for the lane 3 segments already traveled by the vehicle. For this, the objective variables for the road segments already traveled are calculated based on the concrete consumption variables. For the road segments already covered, the predicted objective variables are replaced by the concrete objective variables. Finally, the operating method returns to step S50, in order to perform, based on these updated objective variables, a new optimization calculation to determine the ideal path.
    [0044] Although the invention has been described with reference to certain modalities, a plurality of variants and derivations is possible, which make use of inventive ideas and, for this reason, are within the scope of protection. In particular, the number of operating modes, number and selection of consumption-relevant variables, by means of which at least one objective variable is predicted, can be adjusted to the vehicle's sensor system and to the desired calculation accuracy, depending on the consumption data available. Therefore, the invention should not be limited to the embodiment determined herein; on the contrary, the invention must comprise all the embodiments that are within the scope of the appended claims. LIST OF REFERENCE NUMBERS Operating mode / Hybrid drive Driving route 3 Track segment 4 Energy consumption 5 Route 6 Ideal route 7 Value for expected objective variables, eg driving costs 8 Ideal value for expected objective variables, eg , optimal driving costs 9 Speed limits 10 Variables relevant to consumption 10a Expected variables relevant to consumption 11 Maps/characteristic lines
    权利要求:
    Claims (12)
    [0001]
    1. Method of operation for a hybrid drive of a vehicle, especially a range-extender vehicle or a plug-in hybrid vehicle, which can be operated with various modes of operation (1) for driving the vehicle in the frontal, comprising the following steps: (a) dividing a driving route (2) into a sequence of track segments (3); (b) determining at least one predicted objective variable (4) for each of the operating modes (1) of the hybrid drive on each track segment (3) along the driving path (2); (c) determining an ideal path (6) for the driving route (2), wherein a path (5) is a sequence of operating modes (1) along the driving route (2), such that each road segment (3) is assigned an operating mode (1) and the ideal route (6) is one that has an ideal value (8) for at least one objective variable (4), characterized by the fact that the at least one objective variable is determined as a function of at least one consumption-related variable (10, 10a), comprising a vehicle-specific variable and/or a vehicle-environment-specific variable, wherein the at least one variable (10 ) vehicle environment-specific or vehicle-specific includes: vehicle mass, drive train temperature, battery temperature, outside temperature and/or an internal temperature.
    [0002]
    2. Method according to claim 1, characterized - by the fact that several objective variables for each of the operating modes (1) of the hybrid drive are determined in each track segment (3) along the driving route ( 2) and - in which the ideal path (6) is determined through a multicriteria optimization process, based on several objective variables.
    [0003]
    3. Method according to claim 1 or 2, characterized in that driving costs (7), energy consumption, vehicle emissions, loss of battery life and/or period of time in which the vehicle is driven by means of the electric motor are determined as to at least one objective variable or several objective variables.
    [0004]
    4. Method, according to any one of the preceding claims, characterized in that the determination of at least one objective variable occurs depending on a limitation, in which the limitation comprises: the pre-specification of a certain mode of operation for one or more road segments; and/or the pre-specification of a determined threshold value that a battery charge state must or must not exceed at the end of the driving route.
    [0005]
    5. Method according to any of the preceding claims, characterized in that the vehicle is a range-extender vehicle or a plug-in hybrid vehicle and that the determination of at least one objective variable occurs depending on external possibilities charge for the battery along the driving route.
    [0006]
    6. Method according to any of the preceding claims, characterized in that the determination of at least one objective variable occurs depending on at least one variable related to consumption (10, 10a), namely a driving speed profile.
    [0007]
    7. Method, according to any of the preceding claims, characterized in that at least one variable related to consumption (10a) is provided for the track segments.
    [0008]
    8. Method according to claim 7, characterized in that the predicted driving speed profile is determined depending on a type of road, a speed delimitation (9), a topographic profile of the carriageway and /or a speed of a traffic flow.
    [0009]
    Method according to any one of the preceding claims, characterized by the step in which, after having traversed one or more road segments (3), the real value for the at least one objective variable is determined for the one or more for the various road segments already traveled, and the determination of the ideal route is carried out again.
    [0010]
    10. Method, according to any one of the preceding claims, characterized in that the various modes of operation comprise: purely electrical operation, in which the traction energy is provided exclusively by the battery; a hybrid drive, in which the vehicle is predominantly operated using the internal combustion engine and fuel as energy sources and the electric motor contributes to increased efficiency; and charge the battery through the internal combustion engine.
    [0011]
    Method according to any one of the previous claims 5 to 9, characterized by calculating and reproducing the breakpoints along the ideal route for coupling regenerative current by means of external battery charging at the calculated breakpoints.
    [0012]
    12. Vehicle, especially commercial vehicle, characterized in that it has a hybrid drive, which is operated with a method according to the preceding claims.
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    法律状态:
    2016-02-10| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|
    2018-11-06| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-02-27| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-11-09| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2022-01-11| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 16/06/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102013016569.5|2013-10-04|
    DE102013016569.5A|DE102013016569A1|2013-10-04|2013-10-04|Operating method for a hybrid drive, in particular for selecting optimal operating modes of the hybrid drive along a route|
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