• 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:
    The present invention relates to a method for managing the drive system of a hybrid vehicle comprising a heat engine and an electric machine with energy storage means, the vehicle having information on the topology of a section of road future downhill method in which a prediction of a vehicle power requirement is made based on at least the degree of slope of said section, wherein a prediction of the operating mode of the drive system is also performed; operation being selected from at least one of: - a freewheeling descent, - a descent assisted by the drive system, preferably by the electric machine only, - a braked descent by energy recovery, and in which the level of energy in the storage system is adapted before arrival on the stretch according to these forecasts.
    公开号:FR3028236A1
    申请号:FR1460789
    申请日:2014-11-07
    公开日:2016-05-13
    发明作者:Lionel Arnaiz
    申请人:Valeo Systemes de Controle Moteur SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates to the management of a drive system of a hybrid vehicle comprising a heat engine and an electric machine with an energy storage means. It is known to use information related to the topology of the road traveled by the vehicle, seeking to use the relief of the latter as a potential source of energy recovery. The known energy management strategies adapt the energy level in the storage means to optimize recovery during slope situations. However, a downhill road situation is seen in these strategies as a potential source of energy only if the slope is relatively large. WO 2014/058383 discloses a method in which the expected speed on a future road section is calculated using a geolocation system, so as to determine if the future slope will result in regenerative braking. There is a need for further improvement. the management processes of the drive system of a hybrid vehicle, to further reduce fuel consumption. The invention responds to it by a method of managing the drive system of a hybrid vehicle comprising a heat engine and an electric machine with energy storage means, the vehicle having information on the topology of a vehicle. section of future road downhill, wherein a prediction of a vehicle power requirement is made according to the degree of slope of said section and the speed limitation of said section, wherein a prediction of the operating mode of the the drive is also carried out, this operating mode being chosen from at least: - a freewheeling descent, - a descent assisted by the drive system, preferably by the electric machine only, - a braked descent by recovery of energy, and in which the energy level in the storage system is adapted before arrival on the section according to these forecasts. Thanks to the invention, the drive system can operate in an optimized manner, including for situations of slope where the slope remains relatively low. Preferably, the energy storage means is electrochemical. In an exemplary implementation of the method, the intended mode of operation is a braked descent by energy recovery, and the energy level in the storage means is modified before arrival on the section so that at the end of the section, the energy level in the storage means is higher than at the arrival on the section, and preferably the energy level in the storage means at the end of the segment reaches its upper limit. The energy level in the storage means can also be increased before arrival on said section. For example, the energy level in the storage means is increased before starting the descent so that the energy storage means can provide all the energy necessary to maintain the authorized speed limit for the vehicle during the entire descent, the mode of operation then preferably being driven by the electric motor alone.
    [0002] The prediction of the power requirement is preferably determined also from the knowledge of the authorized speed limit for the vehicle on said section. Preferably, it is sought to ensure that the energy level in the storage means varies between minimum and maximum limits when the vehicle travels said section. Topology information may be received from a location system, including GPS, and / or from other vehicles. The vehicle can maintain a constant speed as it travels through the future section of road, and forecasts can be made on that basis. The invention further relates to a drive system equipped with a calculation means arranged for implementing the method according to the invention as defined above. The subject of the invention is also a hybrid vehicle equipped with a drive system according to the invention. The invention can be better understood on reading the detailed description that follows, of an example of non-limiting implementation. of the latter, and on examining the appended drawing, in which: FIG. 1 is an example of an algorithm that can be implemented in a method for managing the drive system according to the invention; FIG. 2 represents examples of evolution of the power requirement as a function of the vehicle speed and the slope, and FIGS. 3 and 4 illustrate the evolution of the energy in the storage means over time and according to altitude of the vehicle, for two examples of road topologies. The invention applies to a hybrid vehicle comprising a drive system 10, also called "powertrain" in English, this drive system comprising a heat engine and an electric machine with a means of storing energy. The heat engine delivers a torque that can be used to drive the wheels of the vehicle, through a suitable transmission. This engine is for example an internal combustion engine such as a diesel or gasoline engine, or an engine operating with other fuels, liquid or gaseous, such as ethanol or hydrogen, for example. The electric motor may be a motor capable of reversibly operating as an electric generator.
    [0003] The storage means may be electrochemical and / or inertia, preferably being electrochemical such as a battery or one or more supercapacitors. The vehicle comprises information means making it possible to have the topology of the road to come. These means comprise for example a receiver 12 of geolocation data, such as a GPS receiver. The geolocation data allows to know the position of the vehicle in real time and, by querying a source of mapping data, the topology of the road ahead including the presence of slopes, and the degree of slopes. The mapping data source can be embedded.
    [0004] The topology data may also come from other sensors 14, particularly in the case of an interactive road network where the vehicles exchange data with each other, in particular by crossing each other. The mapping data source can also provide information on the possible presence of a speed limit that would cause the driver to slow down. The vehicle comprises calculation means 40 such as an electronic circuit for managing the operation of the drive system 10, which determines in a step 20 on the algorithm of FIG. 1, from at least topology information and authorized speed limit, the power to be provided to travel the next section of road downhill. Calculations can be made under different assumptions and in particular under the assumption that the speed of the vehicle is kept equal to the authorized speed limit, especially when the traffic is fluid. It can be seen in FIG. 2 that the power requirement is all the higher as the speed of the vehicle is high. The need for power is negative over a certain range of speeds which is all the more extensive as the slope is strong. If the power requirement P, given the slope and the speed, is greater than a threshold x2, the energy recovery is not possible and the drive system must remain motor, preferably using the motor electric (electric mode) as a driving source, if the energy level in the storage means allows it, or failing that the engine (hybrid mode). The calculation means 40 determine the commands to be addressed to the drive system 10 according to this situation 30. In particular, they may require operation in electric or hybrid mode, during the descent.
    [0005] If the power requirement P is less than a threshold x1, then the slope can be used to regenerate the energy storage means and the drive system 10 is controlled according to this situation 50. The calculation means can impose to the drive system operation in recovery mode.
    [0006] If the power requirement P is between the two, that is to say x1 P x2, then the drive system 10 is controlled according to this situation 60 to disconnect the wheels and allow the vehicle to evolve into freewheel. The downhill section may possibly be broken down into several portions of different slopes, during which the operating mode changes.
    [0007] Depending on the identified power requirement and operating mode selected, a target energy level to be achieved is also determined, for example the energy level required for the vehicle to maintain the expected pace on the downhill stretch of road . From the difference between the energy level required and the current energy level, it is possible to begin to adjust the energy level in the upstream storage means under favorable conditions in terms of engine efficiency. thermal and / or to achieve a fuel economy, so that the level in it is optimal at the moment the vehicle begins its descent. For example, we will describe with reference to Figure 3 the case where the vehicle will travel a descent 70 of low slope, from a horizontal section 71. After evaluating the need for power to travel the section 70 downhill, given the speed of the intended vehicle, it determines the high energy level N, that must have the storage means to allow it, by discharging its energy to a low level Ng, to provide the necessary power to overcome the friction of the air and allow the vehicle to maintain its speed. The high level N, can correspond to the high limit of the energy storage and the low level Ng to the low speed. At the moment when the high energy level N, is determined, the current level of energy in the storage means is Nc, with N, <Ni.
    [0008] It is therefore necessary to store more energy, which begins to make the vehicle from moment to arrive at energy level N, at the beginning of the descent, at time t,> to. Once the descent has been traveled at time t2, the energy reserve that has reached its low level Ng in the storage means can again be reconstituted, the operating mode passing for example from the hybrid mode between to and ti, to electrical mode between t, and t2, then again to hybrid mode from t2. In the example of FIG. 4, the slope is sufficiently high for the power requirement to be negative. In this case, the energy level in the storage means can be decreased from to before arrival on the section. sloping to ti, operating in electric mode. The energy level in the storage means can reach at the instant ti the low limit or a level such that at the outlet of descent the storage means has filled up with energy and reaches the upper limit. During the descent, between t, and t2 the drive system operates in recovery mode, the recovered energy being stored in the storage means.
    [0009] The invention is not limited to the example which has just been described. This may include the need for power and / or the level of energy to be stored before going downhill, other parameters such as the driver's driving habits, which may help to correct the expected speed. for the vehicle to a value other than the authorized limit.
    [0010] The phrase "with one" should be understood as synonymous with "comprising at least one".
    权利要求:
    Claims (11)
    [0001]
    REVENDICATIONS1. A method of managing the drive system of a hybrid vehicle comprising a heat engine and an electric machine with energy storage means, the vehicle having information on the topology of a future section of road downhill, method wherein a prediction of a power requirement of the vehicle is made based on at least the degree of slope of said section, wherein a prediction of the operating mode of the drive system is also performed, which mode of operation is selected at least among: - a freewheeling descent, - a descent assisted by the drive system, preferably by the electric machine only, - a braked descent by energy recovery, and in which the energy level in the system of storage is adapted before arrival on the stretch according to these forecasts.
    [0002]
    2. Method according to claim 1, the energy storage means being electrochemical.
    [0003]
    3. Method according to claim 1 or 2, wherein when the expected operating mode is a braked lowering by energy recovery, the energy level in the storage means is changed before the arrival on the section, such so that at the end of the section, the energy level in the storage means is higher than at the arrival on the section, and preferably the energy level in the storage means at the end of the section reaches its peak. height limit.
    [0004]
    4. Method according to one of claims 1 and 2, the energy level in the storage means being increased before arrival on said section.
    [0005]
    5. Method according to claim 4, the energy level in the storage means being increased before starting the descent so that the energy storage means can provide all the energy necessary to maintain the speed limit. authorized for the vehicle during the entire descent, the mode of operation being preferably the drive by the electric motor alone.
    [0006]
    6. Method according to any one of claims 1 to 5, the power requirement prediction being determined from also knowledge of the authorized speed limit for the vehicle on said section.
    [0007]
    The method according to any one of claims 1 to 6, wherein the energy level in the storage means varies between minimum and maximum limits as the vehicle travels through said section.
    [0008]
    8. Method according to any one of the preceding claims, the information on the topology being received by the vehicle through a geolocation system, including GPS, and / or from other vehicles.
    [0009]
    The method of any one of claims 1 to 8, wherein the vehicle maintains a constant speed as it travels the future section of road.
    [0010]
    10. Drive system equipped with a calculating means (40) arranged for implementing the method as defined in any one of claims 1 to 9.
    [0011]
    11. Hybrid vehicle equipped with a drive system as defined in claim 10.
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    US20170313298A1|2017-11-02|
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    US10086822B2|2018-10-02|
    CN107074238B|2019-11-19|
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    FR3028236B1|2016-12-16|
    引用文献:
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    WO2013167149A1|2012-05-08|2013-11-14|Volvo Lastvagnar Ab|Energy management system and fuel saving method for a hybrid electric vehicle|
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    CN113942517A|2020-07-15|2022-01-18|厦门雅迅网络股份有限公司|Hydraulic hybrid vehicle power control method, terminal device and storage medium|
    CN111806510B|2020-07-24|2021-09-10|中车青岛四方机车车辆股份有限公司|Rail vehicle brake control method and system and rail vehicle|
    CN112622872A|2020-12-28|2021-04-09|潍柴动力股份有限公司|Energy recovery control method and device|
    法律状态:
    2015-11-30| PLFP| Fee payment|Year of fee payment: 2 |
    2016-05-13| PLSC| Publication of the preliminary search report|Effective date: 20160513 |
    2016-11-30| PLFP| Fee payment|Year of fee payment: 3 |
    2017-11-30| PLFP| Fee payment|Year of fee payment: 4 |
    2019-11-29| PLFP| Fee payment|Year of fee payment: 6 |
    2020-11-30| PLFP| Fee payment|Year of fee payment: 7 |
    2021-11-30| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1460789A|FR3028236B1|2014-11-07|2014-11-07|ENGINE CONTROL SYSTEM|FR1460789A| FR3028236B1|2014-11-07|2014-11-07|ENGINE CONTROL SYSTEM|
    CN201580060356.7A| CN107074238B|2014-11-07|2015-11-05|Engine control system|
    JP2017523979A| JP2017534522A|2014-11-07|2015-11-05|Engine control system|
    US15/523,579| US10086822B2|2014-11-07|2015-11-05|Engine control system|
    EP15804883.5A| EP3215406B1|2014-11-07|2015-11-05|Hybrid vehicle control method|
    PCT/FR2015/052994| WO2016071642A1|2014-11-07|2015-11-05|Engine control system|
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