CN111801259A - 用于计算机动车辆的车轮处的最小扭矩的系统以及用于使用这样的计算系统来确定脚从加速器上抬起的时刻的系统 - Google Patents
用于计算机动车辆的车轮处的最小扭矩的系统以及用于使用这样的计算系统来确定脚从加速器上抬起的时刻的系统 Download PDFInfo
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Abstract
本发明涉及一种用于计算机动车辆的车轮处的最小扭矩的系统,该机动车辆配备有至少一个发动机温度传感器(12a)和至少一个变速箱油温度传感器(12b)、至少一个交流发电机功率传感器(11a)和至少一个空调系统功率传感器(11b)、以及至少一个驾驶辅助计算机(14);·该计算系统包括:·用于根据该车辆行驶的坡度和来自该驾驶辅助计算机(14)的车辆速度来确定所接合的挡位的确定装置(2);·用于根据该所接合的挡位来确定该传动系的输入轴的转速与输出轴的转速之比的装置(3);·用于根据该车辆速度来计算该输出轴的转速的计算装置(4);·用于根据该比率和该输出轴的转速来计算该输入轴的转速的计算装置(5);·用于根据交流发电机的功率、空调空气压缩机的功率、发动机的温度、变速箱油的温度、该所接合的挡位和该输入轴的转速来计算该发动机的抵抗扭矩和变速箱的阻力的计算装置(6);以及·用于根据该发动机的抵抗扭矩、该变速箱的阻力和航行模式的状态来计算该最小扭矩的计算装置(7)。
Description
技术领域
本发明的技术领域是控制机动车辆的动力传动系,并且更具体地是控制这样的车辆的车轮处的扭矩。
背景技术
在以下方面存在问题:根据车辆的当前状态并且根据源自导航系统的关于行程的信息,在抬起脚时提供车辆减速,以便到达目标位置和目标速度。
为了解决这个问题,需要预测性地确定当脚从加速器踏板上抬起时,由于机动车辆中的动力传动系而导致的车轮处的最小扭矩。
从现有技术中,已知文献US 8855844 B2和文献US 8606459 B2。然而,这些文献不能解决该技术问题。
发明内容
本发明的主题是一种用于计算机动车辆的车轮处的最小扭矩的系统,该车辆配备有至少一个发动机温度传感器、至少一个变速箱油温传感器、至少一个交流发电机功率传感器、至少一个空调系统功率传感器、至少一个驾驶辅助计算机。
该计算系统包括:
用于根据该车辆行驶的坡度和来自该驾驶辅助计算机的车辆速度来确定所接合的挡位的装置,
用于根据该所接合的挡位来确定该传动系的输入轴的转速与输出轴的转速之比的装置,
用于根据该车辆速度来计算该输出轴的转速的装置,
用于根据该比率和该输出轴的转速来计算该输入轴的转速的装置,
用于根据交流发电机的功率、空调空气压缩机的功率、发动机的温度、变速箱油的温度、该所接合的挡位和该输入轴的转速来计算该发动机的抵抗扭矩和变速箱的阻力的装置,以及
用于根据该发动机的抵抗扭矩、该变速箱的阻力和航行模式的状态来计算该最小扭矩的装置。
本发明的另一个主题是一种用于确定脚从机动车辆的加速器上抬起的时刻的系统,该机动车辆配备有如上所述的用于计算车轮处的最小扭矩的系统,
该车辆还配备有至少一个发动机温度传感器、至少一个变速箱油温传感器、至少一个交流发电机功率传感器、至少一个空调系统功率传感器、导航系统以及加速器踏板传感器,
该确定系统包括:
被配置为根据来自该导航系统的数据来确定该车辆要行驶的路径上的事件的发生的计算装置,
被配置为确定距事件和距事件上游的坡度的距离的计算装置,
被配置为确定越过事件时的必要速度的计算装置,以及
被配置为根据该最小扭矩值、该距事件和距事件上游的坡度的距离来确定脚从该加速器上抬起的时刻的计算装置,
用于计算该车轮处的最小扭矩的该系统被配置为根据该事件发生时的速度和坡度、发动机的温度和变速箱油的温度、交流发电机的功率、空调压缩机的功率、以及加速器踏板的下压状态来确定该车轮处的最小扭矩。
被配置为确定该距事件和距事件上游的坡度的距离的该计算装置还被配置为确定与坡度矢量相关联的、该车辆的速度矢量,
用于计算该最小扭矩的该系统随后能够确定该车轮处的最小扭矩的矢量,其中,每个值均与该车辆的速度矢量的值和该坡度矢量的值相关联。
用于计算该最小扭矩的该系统可以被配置为周期性地确定根据该发动机的温度、该变速箱油的温度、该交流发电机的功率、该空调压缩机的功率、以及该加速器踏板的下压状态中的至少一项的趋势而重新更新的最小扭矩值的矢量。
被配置为确定脚从该加速器上抬起的时刻的该计算装置还可以被配置为通过对该车轮处的最小扭矩的矢量的值进行插值来确定该车轮处的最小扭矩值。
该车辆可以包括人机界面,其中,被配置为确定脚从该加速器上抬起的时刻的该计算装置还被配置为:还根据所确定的脚从该加速器上抬起的时刻来确定指示是否必须在该人机界面上显示抬脚指示的布尔值。
因此,对驾驶员的脚抬起的时刻进行优化以针对在道路上检测到的事件而产生最佳减速会使得可以避免由于过早抬起脚而需要恢复加速或者由于过晚抬起脚而大量使用制动器的情况。
优点包括驾驶舒适度提高、燃料消耗降低、电能再生时间增加以及对制动器的使用减少。
通过估算车轮处的抵抗扭矩GMP、并通过将此信息添加到可从导航获得的信息和与车辆运行阻力相关联的信息,可以确定最佳减速并且提醒驾驶员抬起脚的最佳时刻。
附图说明
通过阅读单纯作为非限定性示例并参考附图所给出的以下说明将明了本发明的其他目标、特征和优点,在附图中:
-图1展示了用于计算车轮处的最小扭矩的系统的主要元件,以及
-图2展示了用于通知机动车辆的驾驶员、使得可以根据行程事件指示抬起脚的时刻的系统的主要元件。
具体实施方式
在车辆的常规使用中,通常会观察在未踩下制动器(“滑行”)的情况下车辆的减速阶段。驾驶员试图以比通过使用制动器更灵活的方式减速以达到目标速度,并且更经常地是为了在行程的给定时刻,即,车辆到达给定的行程事件(弯道、爬升、环形交叉路口、收费站等)的时刻获得此目标速度。为此,驾驶员将他或她的脚从加速器踏板上抬起。这可能导致两种情况。
在第一种情况下,脚的抬起导致向动力传动系的燃料供应减少,以便降低消耗(和CO2产生)并生成发动机制动。
在第二种情况下,脚的抬起导致进入自由滑行模式(或“航行”模式),也称为怠速/停止,其目的是使车辆更加稳定、最大程度地利用车辆的惯性、避免驾驶员再次加速,并且因此也降低了消耗。只有在车辆配备了该模式并且仅当满足启用条件时才能进入航行模式。
如果使用来自嵌入式导航系统的信息来了解车辆行程中即将发生的行程事件,并结合对抵抗车辆前进的力(空气动力、抵抗扭矩GMP等)的估算,则可以向驾驶员建议从加速器上抬起脚的最佳时刻,以便以目标速度到达下一个行程事件。
因此,有必要确定建议驾驶员抬起脚的时刻。这样的建议可以显示在车辆的人机界面上,特别是以指示灯的形式。
为此,有必要关于车辆的瞬时位置以及关于即将发生的事件的位置来预测性地计算车辆的减速,以便然后确定建议驾驶员抬起脚的时刻。
然后确定抵抗车辆沿行程前进的力(例如,空气摩擦力和道路摩擦力、尤其是包括地形的贡献)的趋势。
第一抵抗力是由于动力传动系GMP而在车轮处产生的最小扭矩Cmin。此力根据航行模式的状态(表示为state_sailing)、车辆的速度Vs、平均坡度%slope、所接合的挡位(表示为gear)、以及附件的能量消耗Pacc而变化到第一程度。
Cmin→f(state_sailing,Vs,%slope,gear,Pacc)(等式1)
更具体地,最小扭矩Cmin是以下五个扭矩的组合:附件扭矩(C_acc)、发动机扭矩(C_mot)、离合器扭矩(C_emb)、变速箱扭矩(C_bv)和动力轴扭矩(C_pont)。
因此,有必要瞬时且预测性地确定这些扭矩中的每一个,以便最佳地预测车辆的减速,并因此正确地提醒驾驶员。
最小扭矩Cmin的计算是基于关于速度(即由速度矢量组成的车辆速度Vs)的多项信息进行的。
此关于速度的信息包括例如速度值,例如100km、50km或10km。
因此,当速度将改变时,可以对最小扭矩值Cprim进行预计。
这对于平均坡度同样适用。
如图1所示,用于计算最小扭矩Cmin的系统1包括:用于根据车辆行驶的坡度%slope和车辆速度Vs来确定所接合的挡位(表示为gear)的装置2、以及用于根据所接合的挡位gear来确定传动系的输入轴的转速与输出轴的转速之比(表示为ratio_prim_sec)的装置3。
用于计算最小扭矩的系统1还包括:用于根据车辆速度Vs来计算输出轴的转速Nsec的装置4、以及用于根据比率ratio_prim_sec和输出轴的转速Nsec来计算输入轴的转速Nprim的装置5。
标记为6的计算装置根据交流发电机的功率P_alt、空调压缩机的功率P_ac、发动机的温度TCO、变速箱油的温度TGB、所接合的挡位gear、以及输入轴的转速Nprim(其例如根据旋转系统Nsec和变速箱的齿轮减速比来获得)来确定发动机的抵抗扭矩C_mot和变速箱的阻力C_gb(与扭矩一致)。
变速箱的齿轮减速比(其对应于将要接合的挡位)是从包含针对给定速度和给定坡度而常规选择的传动比信息的表中获得的。
然后,计算装置7根据发动机的抵抗扭矩C_mot、变速箱的阻力C_gb和航行模式的状态state_sailing来确定最小扭矩C_min。
当停用航行模式时,最小扭矩C_min等于发动机的抵抗扭矩C_mot。
当启用航行模式时,最小扭矩C_min等于发动机的抵抗扭矩C_mot与变速箱的阻力C_gb之和。
关于由驾驶辅助计算机ADAS(“advanced driver assistance system(先进驾驶员辅助系统)”的缩写)选择的速度以及关于车辆前方的平均坡度来进行预测。
以想知道最小扭矩Cmin在50km/h的速度和5%的正坡度下将取什么值为例。
为此,驾驶辅助计算机ADAS将关于坡度%slope和速度Vs的信息传输到用于计算最小扭矩的系统1,该系统根据预定的映射从该信息推断出所接合的挡位(表示为gear)。
然后,根据嵌入的映射从所接合的挡位推断出发动机扭矩C_mot和变速箱的阻力C_gb,并且扭矩C_acc、C_bv和C_pont尤其取决于交流发电机的功率P_alt、空调压缩机的功率P_ac、发动机的温度TCO、变速箱油的温度TGB、所接合的挡位gear以及输入轴的转速Nprim。
在已知扭矩C_mot和变速箱的阻力C_gb以及航行模式的状态的情况下,可以确定最小扭矩C_min。
图2展示了用于通知机动车辆的驾驶员、使得可以根据行程事件指示抬起脚的时刻的系统的主要元件。
用于计算最小扭矩的系统1根据以下各项来确定最小扭矩Cmin:来自驾驶辅助计算机ADAS 14的速度Vs和坡度%slope的值、来自温度传感器12a的发动机的温度TCO和来自温度传感器12b的变速箱油的温度TGB、来自温度传感器11a的交流发电机的功率P_alt和来自温度传感器11b的空调压缩机的功率P_ac、以及来自航行控制装置的航行模式的状态state_sailing(该状态取决于由加速器踏板传感器16确定的加速器踏板的下压状态)。
驾驶辅助计算机14根据来自导航系统13的导航信息来确定速度Vs和坡度%slope的值。导航信息应该理解为特别是指距下一事件的距离和海拔差。
在一个实施例中,驾驶辅助计算机14将与坡度矢量%slope相关联的车辆速度矢量Vs传输到用于计算最小扭矩的系统1。用于计算最小扭矩的系统1传输返回最小扭矩的矢量,其中每个值均与车辆速度矢量Vs的值和坡度矢量%slope的值相关联。
该计算是实时进行的,使得最小扭矩值的矢量是根据对用于计算最小扭矩的系统1的输入的趋势而不是速度矢量Vs或坡度矢量%slope的趋势来重新更新。
驾驶辅助计算机14然后可以通过内插可用值来确定扭矩值。
驾驶辅助计算机14还确定旨在用于人机界面15的布尔值Acc_off_disp,该布尔值指示是否应该显示抬脚指示。布尔值Acc_off_disp是根据最小扭矩C_min、到行程中下一事件的距离和接近速度来确定的。
Claims (6)
1.一种用于计算机动车辆的车轮处的最小扭矩的系统,
该车辆配备有至少一个发动机温度传感器(12a)、至少一个变速箱油温传感器(12b)、至少一个交流发电机功率传感器(11a)、至少一个空调系统功率传感器(11b)、至少一个驾驶辅助计算机(14),
其特征在于,该系统包括:
用于根据该车辆行驶的坡度和来自该驾驶辅助计算机(14)的车辆速度来确定所接合的挡位的装置(2),
用于根据该所接合的挡位来确定该传动系的输入轴的转速与输出轴的转速之比的装置(3),
用于根据该车辆速度来计算该输出轴的转速的装置(4),
用于根据该比率和该输出轴的转速来计算该输入轴的转速的装置(5),
用于根据交流发电机的功率、空调空气压缩机的功率、发动机的温度、变速箱油的温度、该所接合的挡位和该输入轴的转速来计算该发动机的抵抗扭矩和变速箱的阻力的装置(6),以及
用于根据该发动机的抵抗扭矩、该变速箱的阻力和航行模式的状态来计算该最小扭矩的装置(7)。
2.一种用于确定脚从机动车辆的加速器上抬起的时刻的系统,该机动车辆配备有如权利要求1所述的用于计算车轮处的最小扭矩的系统(1),
该车辆还配备有至少一个发动机温度传感器(12a)、至少一个变速箱油温传感器(12b)、至少一个交流发电机功率传感器(11a)、至少一个空调系统功率传感器(11b)、导航系统(13)以及加速器踏板传感器(16),
该确定系统包括:
被配置为根据来自该导航系统的数据来确定该车辆要行驶的路径上的事件的发生的计算装置,
被配置为确定距事件和距事件上游的坡度的距离的计算装置,
被配置为确定越过事件时的必要速度的计算装置,以及
被配置为根据该最小扭矩值、该距事件和距事件上游的坡度的距离来确定脚从该加速器上抬起的时刻的计算装置,
用于计算该车轮处的最小扭矩的该系统(1)被配置为根据该事件发生时的速度和坡度、发动机的温度和变速箱油的温度、交流发电机的功率、空调压缩机的功率、以及加速器踏板的下压状态来确定该车轮处的最小扭矩。
3.如权利要求2所述的确定系统,其中,被配置为确定该距事件和距事件上游的坡度的距离的该计算装置被配置为确定与坡度矢量相关联的、该车辆的速度矢量,
用于计算该最小扭矩的该系统(1)随后能够确定该车轮处的最小扭矩的矢量,其中,每个值均与该车辆的速度矢量的值和该坡度矢量的值相关联。
4.如权利要求3所述的确定系统,其中,用于计算该最小扭矩的该系统(1)被配置为周期性地确定根据该发动机的温度、该变速箱油的温度、该交流发电机的功率、该空调压缩机的功率、以及该加速器踏板的下压状态中的至少一项的趋势而重新更新的最小扭矩值的矢量。
5.如权利要求3或4中任一项所述的确定系统,其中,被配置为确定脚从该加速器上抬起的时刻的该计算装置还被配置为通过对该车轮处的最小扭矩的矢量的值进行插值来确定该车轮处的最小扭矩值。
6.如权利要求3或4中任一项所述的确定系统,其中,该车辆包括该车辆的人机界面(15),其中,被配置为确定脚从该加速器上抬起的时刻的该计算装置还被配置为:还根据所确定的脚从该加速器上抬起的时刻来确定指示是否必须在该人机界面(15)上显示抬脚指示的布尔值。
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JP7465212B2 (ja) | 2024-04-10 |
JP2021507845A (ja) | 2021-02-25 |
KR102577788B1 (ko) | 2023-09-13 |
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WO2019121422A1 (fr) | 2019-06-27 |
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FR3075958B1 (fr) | 2019-11-22 |
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