• 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 invention relates to a method for controlling (1) an energy equivalence factor (K) of a motor vehicle comprising a heat engine and at least one electric motor powered by an electric accumulator, the method comprising a step of estimating (2) a value (Kcalc) of said energy equivalence factor (K) proportional to a predetermined maximum value (Kmax) when said difference (σ) is less than said threshold value (εsoe ', -εsoe), or proportional to a predetermined minimum value (Kmin) when said difference (σ) is greater than said threshold value (εsoe '-εsoe).
    公开号:FR3038081A1
    申请号:FR1555874
    申请日:2015-06-25
    公开日:2016-12-30
    发明作者:Abdelmalek Maloum
    申请人:Renault SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a method for controlling an energy equivalence factor for a hybrid motor vehicle. The present invention relates to the management of distribution of energy flows in a hybrid powertrain of a motor vehicle. More specifically, its purpose is to determine an energy equivalence factor representing the weighting applied between the input of energy of thermal origin and the energy input of electrical origin, to minimize on a point of operation the overall energy consumption of a hybrid powertrain of a motor vehicle, of the type comprising a heat engine and at least one electric motor powered by a battery.
    [0002] A powertrain of a motor vehicle with a propulsion or a hybrid traction comprises a heat engine and one or more electrical machines, powered by at least one battery on board the vehicle. Hybrid powertrain control systems are designed to manage the operation and timing of different engines depending on driving conditions, to minimize fuel consumption and minimize particulate pollutant emissions. We talk about the management of thermal and electrical energy flows, in particular to designate the control strategy implemented in the control system in order to optimize the power distribution between thermal energy flows and energy flows. electric. The principle used to choose the best operating point is to minimize the sum of the thermal consumption and the electrical consumption by weighting the energy of electrical origin by a weighting or equivalence factor.
    [0003] This factor weights the electrical energy with the thermal energy, that is to say it gives the amount of fuel needed to recharge a certain amount of electrical energy stored in the battery or, with a 3038081 2 inverse reasoning, the amount of fuel that can be saved by using a certain amount of energy from the battery. The patent application FR2988674, filed by the applicant, which discloses a method for controlling an equivalence factor 5 implementing a proportional-integral control command, also called PI regulation, is known in particular. However, such a PI control command needs to function optimally from a prior knowledge of the regulated system as well as its dynamics. From a technical point of view, this is the proportional-integral gain calibration step 10 of the PI regulator. This calibration step is relatively long and must be performed before the implementation of the control method. In addition, this calibration is relatively complex, particularly with respect to the calibration of the proportional gain, since the dynamics of the system is, by definition, unknown at the time of calibration. In addition, the calibration of the proportional gain can not compensate for disturbances not taken into account, in particular the energy power consumed by the auxiliary elements of the motor vehicle, for example the on-board multimedia system, the air-conditioning of the motor vehicle, the computers, etc. As a result, the calibration step is long and must be performed each time the control command is applied to a different vehicle model. This makes this control method relatively expensive to adapt to different motor vehicle models. Also, there is a need for a method of controlling an energy equivalence factor that is simpler to adapt to different motor vehicle models. A method of controlling an energetic equivalence factor corresponding to a weighting value applied between a thermal energy input and a power supply of electrical origin is proposed to minimize an operating point. the overall energy consumption of a hybrid powertrain for a motor vehicle 3038081 3 comprising a heat engine and at least one electric motor powered by an electric accumulator. The method comprises a step of estimating a value of said energy equivalence factor as a function of the difference between an instantaneous value of the energy state of the electric accumulator and a target value of the state of energy. energy of the electric accumulator. The estimation step comprises: a step of comparing said difference with at least one positive threshold value and at least one negative threshold value, and a step of calculating the estimated value of the energy equivalence factor. said estimated value being: o proportional to a predetermined maximum value when said difference is smaller than said negative threshold value, or o proportional to a predetermined minimum value when said difference is greater than said positive threshold value, or o function of said difference, said negative and positive threshold values, and predetermined minimum and maximum values when said difference is between the negative threshold value and the positive threshold value.
    [0004] Thus, the estimation step is independent of the system parameters, in particular the driving conditions and the dynamic parameters of the motor vehicle. In other words, the process is robust. In addition, the system is adaptive, since the estimation step takes into account the difference, also called the error, between an instantaneous value of the energy state of the electric accumulator and a value target of the state of energy of the electric accumulator before evaluating an estimated value of the energy equivalence factor. In other words, we look at the system to be controlled before acting. In this way, this method is relatively simple to adapt to different motor vehicles. It can also be used without it being necessary to know the running conditions of the motor vehicle. By the step of comparing said difference with at least one positive threshold value and at least one negative threshold value, it is possible to control the energy equivalence factor in the charging and discharging modes of the accumulator. electric. Indeed, the sign of the difference is, in general, a function of the operating mode of the electric accumulator at the time of execution of the method.
    [0005] When said difference is between the negative threshold value and the positive threshold value, the estimated value of the energy equivalence factor can be checked when the error is between the two threshold values; in other words, when the error is small. Thus, the system is stabilized so as to optimize the overall energy performance of the vehicle. Moreover, this control method makes it possible to obtain relatively high response times with respect to proportional-integral control commands. Advantageously and in a nonlimiting manner, said positive and negative threshold values are opposite. Thus, it is possible to optimize the operation of the method, in particular its speed of execution, by making comparisons on the absolute values of the threshold values. Advantageously and in a nonlimiting manner, the control method comprises an integration step when said estimated value of the equivalence factor is between the negative and positive threshold values, said integration step defining an integrated term intended to be added to said estimated value. In particular the integrated term may be a function of the difference, also called error.
    [0006] In particular, the integrated term may be proportional to a value of the integral of the error. Thus, it is possible to smooth the variations of the energy equivalence factor, especially when the difference between the instantaneous value of the energy state of the electric accumulator and the target value of the energy state of the accumulator. electric is relatively weak. Advantageously and in a nonlimiting manner, the control method may comprise a step of limiting said estimated value of the energy equivalence factor during which said estimated value is limited by limits defined by said predetermined minimum value and by said predetermined maximum value. It is understood that we speak here of the estimated value, whether or not it has been summed, and thus modified, by an integrated term as described above.
    [0007] Thus, a good motor vehicle operation can be ensured by ensuring that the energy equivalency factor is always within acceptable energy equivalency factor operating limits. For this limitation step, it is also possible to speak of a saturation step of the estimated value of the energy equivalence factor.
    [0008] In particular, it is possible to limit the risks of deterioration or premature wear of the electric accumulator. The invention also relates to a device for controlling an energy equivalence factor corresponding to a weighting value applied between a supply of energy of thermal origin and a supply of energy 15 of electrical origin, to minimize on a operating point the overall energy consumption of a hybrid powertrain for a motor vehicle comprising a heat engine and at least one electric motor powered by an electric accumulator, said device comprising: means for receiving an instantaneous value of state of energy of the electric accumulator, for example a sensor of the electric accumulator, or a processor, a DSP, or a microcontroller implementing an operating model of the electric accumulator, and a transmission bus data from the sensor, or any other suitable means, - means for calculating a difference between said instantaneous value of the state of energy of the electric accumulator and a target value of the state of energy of the electric accumulator, for example a processor, a DSP, a microcontroller, or any other suitable means, means for comparing said difference with at least one positive threshold value and at least one negative threshold value, for example a processor, a DSP, a microcontroller, or any other suitable means, identical or not to the means for calculating the difference, 3038081 6 means for calculating an estimated value of the energy equivalence factor, for example a processor, a DSP, a microcontroller, or any other suitable means, identical or not to the means for calculating the difference and / or means for comparing the difference with the Minus one threshold value, said estimated value being: o proportional to a predetermined maximum value when said difference is smaller than said negative threshold value, or o proportional at a predetermined minimum value when said difference is greater than said positive threshold value, or 10 o depending on said difference, said negative and positive threshold values, and predetermined minimum and maximum values when said difference is between the threshold value negative and the positive threshold value. The invention also relates to a motor vehicle comprising a device 15 for controlling an energy equivalence factor as described above. Other features and advantages of the invention will emerge on reading the following description of a particular embodiment of the invention, given by way of non-limiting indication, with reference to the single figure which represents a block diagram of a control method of an energy equivalence factor according to an embodiment of the invention. With reference to the single FIGURE, the control method 1 providing control of the energy equivalence factor of a hybrid motor vehicle includes a step 2 of estimating a value Kcalc of the energy equivalence factor K. L estimation step 2 firstly comprises a first error calculating step a, in which the value of the difference a, also commonly known as error a, is calculated between the instantaneous value soe of the state of energy of the electric accumulator and the target value soe "f of the energy state of the electric accumulator The calculation 5 of the error a is carried out by the subtraction soe-soe" fde the value instantaneous soe of the energy state by the target value soe f The error may be a positive or negative value.
    [0009] From a general point of view, the error a is negative when the target value soeref is low, for example between 0% and 10% of the maximum value of the energy state of the electric accumulator. In this case, the control will aim to discharge the electric accumulator, and thus to promote the consumption of the electrical energy. On the contrary, the error a is positive when the target value soeref is large, for example between 90% and 100% of the maximum value of the energy state of the electric accumulator. In this case, the control will aim at recharging the electric accumulator.
    [0010] After the error calculation step 5, a comparison step 6 is made between the error a and two threshold values Esoe, -Esoe. Here, the error a is compared with two threshold values, a value Esoe positive threshold, and Esoe negative threshold value Both threshold values are opposite. In other words, the two threshold values Esoe, Esoe are equal in absolute value. According to one alternative, the two threshold values can have different absolute values. Preferentially, the threshold values Esoe, -Esoe are in absolute values close to zero, for example between 0 and 1.
    [0011] The comparison step 6 distinguishes three cases: - If the error a is less than the negative threshold value - Esoe; - If the error a is greater than the positive threshold value Esoe; - If the error a is between the negative threshold value-Esoe and the positive threshold value Esoe.
    [0012] According to the result of the comparison step 6, a calculation step 7 is then made of the estimated value Kcalc of the energy equivalence factor K. If the error a is less than the negative threshold value E Estimated value Kcalc is determined by the following calculation: Kcalc = Kmax (1a Where: 3038081 8 Kmax is a maximum acceptable value of the equivalence factor, and a is a predetermined value, greater than 1. The value a is a pre-calibrated value, and constant If the error a is greater than the positive threshold value F -soe, the estimated value 5 Kcalc is determined by the following calculation: Kcalc = Kmin ce In which: Knnn is a minimum acceptable value The maximum values Kmax and minimum Knnn of the acceptable energy equivalence factor are predetermined as a function of the electric accumulator, ie these values are operating constants of the energy accumulator. If the error a is between the negative threshold value -soe and the positive threshold value F -soe, the estimated value Kcalc is determined by the following calculation: Kcalc = (cr + Esoe) Kmi According to an alternative, the error a may be compared with a single threshold value F -soe, for example a value close to zero, less than or greater than zero, or equal to zero. In this alternative, the comparison 6 and calculation 7 steps will be similar to those previously described for two threshold values, with the difference that the comparison 6 will only take into account the cases where the error a is greater or less than the threshold value. Esoe single threshold value - and the calculation step 7 will then only consider the first two calculations (1) and (2) described above, simply by replacing the negative and positive values by the single threshold value, the third calculation (3) being adapted only when two threshold values are taken into account. Thus, the estimated value Kcalc of the energy equivalence factor is obtained by a robust estimation step 2. (2) 3038081 9 In other words, it is estimated a value of the energy equivalence factor regardless of the running conditions of the motor vehicle, or the physical parameters of the motor vehicle. This estimation step 2 is accordingly relatively simple to adapt to different systems and does not require complex and expensive calibration to operate. In addition, the estimation step 2 is adaptive. Indeed, during this step, the error is estimated before evaluating the estimated value Kcalc. In other words, our process looks at the system before acting.
    [0013] In this way, a Kcalc value of the energy equivalence factor can be estimated in a robust and adaptive manner. After estimating the value Kcalc of the energy equivalence factor K, during the estimation step 2, an integration step 3 is carried out. During the integration step 3, an integrated term 8 is determined. in function of the error a: if the error a is between the negative threshold value --soe and the positive threshold value E -soel the integrated term 8 is a function of a predefined gain kiG. In other words, the integrated term 8 corresponds, after Laplace transform, to the function lp kiGo-; and 20 - if the error a is less than the negative threshold value -Esoe or if the error a is greater than the positive threshold value E -soel the integrated term 8 is equal to zero. After determining the integrated term 8, it is added to the estimated value Kcalc during a summing step 9 of the integration step 3, as a function of the value of the error a, as described herein. -above. The integration step 3 makes it possible to smooth the variation of the energy equivalence factor K when the instantaneous value soe of the energy state of the electric accumulator is relatively close to the target energy state soeref. At the end of the integration step, a smoothed value Kcalc of the estimated value Kcalc is obtained. Indeed, the positive threshold values E -soe and negative -Esoe are values relatively close to zero, defining thresholds between which error 3038081 is considered low. It is then sought to stabilize the variations of the energy equivalence factor K, in order to optimize the overall energy consumption. After the integration step 3, there is proceeded to a limitation step 4, during which it is checked that the smoothed value Kcnic is between the maximum values Kmax and minimum Knnn of the acceptable energy equivalence factor. If the smoothed value Kanc falls outside these limits, it is reduced to the nearest maximum or minimum value. In other words, saturation 4 of the smoothed values Kanc is carried out in order to keep them between the maximum values Kmax and minimum Knnn of the acceptable energy equivalence factor. This ensures proper operation of the system at each time of operation, in particular so as not to cause risk of damage to the electric accumulator.
    [0014] The value obtained after the limiting step 4 corresponds to the value of the energy equivalence factor K controlled by the method. The invention is not limited to the embodiment described. In particular, the integration step 3 and the limitation step 4 are optional steps, which may or may not be present, independently of one another, of the control method 1 implemented. 25
    权利要求:
    Claims (6)
    [0001]
    REVENDICATIONS1. A method of controlling (1) an energy equivalence factor (K) corresponding to a weighting value applied between a thermal energy input and a power supply of electrical origin, to minimize on a point of operation the overall energy consumption of a hybrid powertrain for a motor vehicle comprising a heat engine and at least one electric motor powered by an electric accumulator, the method comprising a step of estimating (2) a value (Kcalc ' ) of said energy equivalence factor (K) as a function of the difference (a) between an instantaneous value (soe) of the energy state of the electric accumulator and a target value (soeref) of the state of energy of the electric accumulator, characterized in that the estimation step (2) comprises: - a step of comparing (6) said difference (a) with at least one positive threshold value (Esoe / 1) and minus a value of s negative eil (Esoe), and - a calculation step (7) of the estimated value (Kcalc ') of the energy equivalence factor (K), said estimated value (Kcalc) being: o proportional to a predetermined maximum value (Kmax ) when said difference (a) is smaller than said negative threshold value (-E o proportionnl "or a predetermined minimum value (Knnn) when said difference (a) is greater than said positive threshold value E lo function (Esoe) where said difference (a), said negative (-Esoe) and positive threshold values (Esoen 1) and predetermined minimum and maximum values (Kmin, Kmax) when said difference (a) is between the negative threshold value (- positive threshold (Esoe).
    [0002]
    2. Control method (1) according to claim 1, characterized in that said positive threshold values' Esoe / and negative (-Esoe) are opposite. Esoe) and the value of 3038081 12
    [0003]
    3. control method (1) according to any one of claims 1 or 2, characterized in that it comprises an integration step (3) when said estimated value (Kcalc) of the equivalence factor (K) is between the 5 negative threshold values (-Esoe, - and positive Esoen said integration step (3) - defining an integrated term (8) to be added to said estimated value (Kcalc)
    [0004]
    4. Control method (1) according to any one of claims 1 to 3, lo characterized in that it comprises a step of limiting (4) said estimated value (Kcalc) of the energy equivalence factor (K) in which said estimated value (Kcalc) is limited by limits defined by said predetermined minimum value (Kmin) and by said predetermined maximum value (Kmax). 15
    [0005]
    5. Control device of an energy equivalence factor (K) corresponding to a weighting value applied between a supply of energy of thermal origin and a power supply of electrical origin, to minimize on a point of operation the overall energy consumption of a hybrid powertrain for a motor vehicle comprising a heat engine and at least one electric motor powered by an electric accumulator, said device comprising: means for receiving an instantaneous value (soe) of the energy state of the electric accumulator; means for calculating a difference (a) between said instantaneous value (soe) of the energy state of the electric accumulator and a target value (soeref) of the state of energy of the electric accumulator - means for comparing said difference (a) with at least one positive threshold value lEsoe, 1 and at least one negative threshold value. ), and - means for calculating an estimated value (Kcalc) of the energy equivalence factor (K), said estimated value (Kcalc) being: o proportional to a predetermined maximum value (Kmax) when said difference ( a) is smaller than said negative threshold value (-Esoe), or o proportional to a predetermined minimum value (Knnn) when said difference (a) is greater than said positive threshold value (Esoe), or o function of said difference (a), said negative (-Esoe) and positive (Esoe) threshold values, and predetermined minimum and maximum values (Knnn, Kmax) when said difference (a) is between the negative threshold value (- Esoe) and the positive threshold value ('Esoe) -
    [0006]
    A motor vehicle comprising a control device of an energy equivalence factor (K) according to claim 5.
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    法律状态:
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    2016-12-30| PLSC| Publication of the preliminary search report|Effective date: 20161230 |
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    优先权:
    申请号 | 申请日 | 专利标题
    FR1555874A|FR3038081B1|2015-06-25|2015-06-25|METHOD FOR CONTROLLING AN ENERGY EQUIVALENCE FACTOR FOR A HYBRID AUTOMOBILE VEHICLE|
    FR1555874|2015-06-25|FR1555874A| FR3038081B1|2015-06-25|2015-06-25|METHOD FOR CONTROLLING AN ENERGY EQUIVALENCE FACTOR FOR A HYBRID AUTOMOBILE VEHICLE|
    PCT/FR2016/051500| WO2016207528A1|2015-06-25|2016-06-20|Method for controlling an energy equivalence factor for a hybrid motor vehicle|
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    US15/738,633| US10576961B2|2015-06-25|2016-06-20|Method for controlling an energy equivalence factor for a hybrid motor vehicle|
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    CN201680046543.4A| CN107850876B|2015-06-25|2016-06-20|Method for controlling the energy equivalence factor of a hybrid motor vehicle|
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