CN109927558B - 用于控制制动***的方法以及用于实施该方法的制动*** - Google Patents
用于控制制动***的方法以及用于实施该方法的制动*** Download PDFInfo
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Abstract
本发明涉及一种用于控制制动***以在机动车的第一车桥和第二车桥之间设定总制动力矩分配的方法以及一种用于实施该方法的制动***,其中该制动***包括摩擦制动设备(20‑1)和再生式制动设备(20‑2),该制动***具有总制动力矩(MB,Ges),该总制动力矩包括摩擦制动设备(20‑1)的摩擦制动力矩分量和再生式制动设备(20‑2)的再生制动力矩分量,在要求制动的情况下该总制动力矩根据可预定的制动力矩比例W1/W2被分配到第一车桥(A1)和第二车桥(A2)上,所述摩擦制动设备(20‑1)的摩擦制动力矩分量(MB,Reib)根据恒定的摩擦制动力矩分配B1/B2被分配到车桥(A1、A2)上。本发明的特征在于,为一个车桥(A1、A2)确定最小再生力矩(MB,Rek,Min),在这个车桥(A1、A2)上提供该最小再生力矩以及对于所有行驶状况都保持将该最小再生力矩作为再生制动力矩分量设定在这个车桥(A1、A2)上。
Description
技术领域
本发明涉及一种用于控制制动***以在机动车的第一车桥和第二车桥之间调节总制动力矩分配的方法以及一种用于实施该方法的制动***。所述制动***包括摩擦制动设备和再生式制动设备,所述制动***具有总制动力矩,该总制动力矩包括摩擦制动设备的摩擦制动力矩分量和再生式制动设备的再生制动力矩分量,在要求制动的情况下,根据可预定的制动力矩比例W1/W2将该总制动力矩分配到第一车桥和第二车桥上,所述摩擦制动设备的摩擦制动力矩分量通过恒定的摩擦制动力矩分配比例B1/B2被分配到第一车桥和第二车桥上。
背景技术
由产生摩擦制动力矩分量的摩擦制动设备和产生再生制动力矩分量的再生式制动设备产生总制动力矩的机动车以及用于控制在机动车的车桥之间设定期望的总制动力矩分配的制动***的相应方法是充分已知的。对此仅举例参阅文献DE 10 2015 106 746A1。
在此已知了在面临不稳定威胁的行驶状况时再生制动力矩分量降至零,即总制动力矩于是仅由摩擦制动设备产生,从而为例如ABS***提供更多操作空间。在此证明为不利的是,由于再生制动力矩分量降至零,结果无再生制动力矩分量被提供用于设定总制动力矩分配。
发明内容
本发明的任务是,提出一种用于控制设定总制动力矩分配的制动***的方法,利用该方法即使在面临不稳定威胁的情况下也使要分配至车桥上的总制动力矩具有再生制动力矩分量。
该任务通过一种具有以下特征的用于控制制动***以在机动车的第一车桥和第二车桥之间调节总制动力矩分配的方法解决。所述制动***包括摩擦制动设备和再生式制动设备,所述制动***具有总制动力矩,该总制动力矩包括摩擦制动设备的摩擦制动力矩分量和再生式制动设备的再生制动力矩分量,在要求制动的情况下,根据可预定的制动力矩比例W1/W2将该总制动力矩分配到第一车桥和第二车桥上,所述摩擦制动设备的摩擦制动力矩分量通过恒定的摩擦制动力矩分配比例B1/B2被分配到第一车桥和第二车桥上。
按已知的方式,由产生摩擦制动力矩分量的摩擦制动设备和产生再生制动力矩分量的再生式制动设备提供总制动力矩,总制动力矩在要求制动的情况下被以可预定的制动力矩比例W1/W2分配至机动车的车桥,其中为摩擦制动力矩分量在车桥上的分配规定恒定的摩擦制动力矩分配B1/B2。
根据本发明在此提出,如果B1≠W1,为一个车桥确定最小再生力矩,在该确定的车桥上提供该最小再生力矩,且对于所有行驶状况都保持将该最小再生力矩作为再生制动力矩分量设定在所确定的车桥上。
通过根据本发明的方法在此以有利方式确保,即使在面临不稳定威胁的行驶状况中也在考虑到再生制动力矩分量的情况下实现总制动力矩在机动车车桥上的分配。
就是说,根据本发明确保了,根据预先规定的或期望的制动力矩比例W1/W2分配到车桥上的总制动力矩分配一直具有再生制动力矩分量。
为此,根据本方法首先确定要为之提供最小再生力矩的车桥且为该车桥计算最小再生力矩。然后为这两个车桥确定余下的剩余摩擦力矩并且在考虑到要在确定的车桥上提供的最小再生力矩的情况下提供期望的总制动力矩分配。
在此如果W1<B1,则确定应在第二车桥A2上提供最小再生力矩MB,Rek,Min,以及根据下式确定该最小再生力矩MB,Rek,Min:
根据下式计算用于所述两个车桥的余下的剩余摩擦力矩MB,Reib,rest:
根据如下等式得出要在第二车桥A2上提供的剩余力矩分量MB,Reib,A2:
MB,Reib,A2=MB,Reib,rest*B2
根据如下等式得出要在第一车桥A1上提供的剩余摩擦力矩MB,Reib,A1:
MB,Reib,A1=MB,Reib,rest*B1。
如果W1>B1,则确定应在第一车桥上A1提供最小再生力矩MB,Rek,Min。在此情况下,根据下式确定要在第一车桥上A1提供的最小再生力矩MB,Rek,Min:
根据下式确定用于两个车桥的余下的剩余摩擦力矩MB,Reib.Rest:
根据如下等式得出要在第一车桥上A1提供的剩余摩擦力矩MB,Reib,A1和要在第二车桥上提供的剩余摩擦力矩MB,Reib,A2:
MB,Reib,A1=MB,Reib,rest*B1
以及
MB,Reib,A2=MB,Reib,rest*B2。
仅为了完整起见要指出的是,上面等式中B1、B2、W1以及W2的值要作为百分数值使用。也就是说,如果分配B1/B2或比例W1/W2未表示为百分数值,则应进行换算。
示例1
如果W1/W2=1/1
以及
例2
如果B1/B2=60/40
以及
本发明的任务还在于提供一种实施所述方法的制动***。
该任务的解决方案由具有以下特征的制动***得出。
根据本发明的制动***包括摩擦制动设备、再生式制动设备以及调控单元,该调控单元驱控摩擦制动设备和再生式制动设备,以便在要求制动的情况下以期望的制动力矩比例W1/W2提供总制动力矩分配。调控单元在此还被布置成,确定要在一个车桥上提供的最小再生力矩以及确定余下的剩余摩擦力矩,在要求制动的情况下在考虑到要在车桥上提供的最小再生力矩的情况下来提供以期望的制动力矩比例W1/W2设置的总制动力矩分配,其中对于所有行驶状况都保持将最小再生力矩作为再生制动力矩分量设定在一个车桥上。
提供根据本发明的制动***在此以有利的方式确保:根据预先规定的或期望的制动力矩比例W1/W2分配在车桥上的总制动力矩分配一直具有再生制动力矩分量。
本发明的其他优点和应用可能性由下述说明以及附图所示实施例得出。
附图说明
附图示出:
图1示出用于阐明所述方法的机动车的示意图,该方法用于控制在机动车的第一和第二车桥之间设定总制动力矩分配的制动***。
具体实施方式
图1在示意图中示出了整体以附图标记10表示的机动车。前桥、下面被称作第一车桥以附图标记A1表示,后桥、下面被称作第二车桥以附图标记A2表示。
第一车桥A1的车轮12、14以及第二车桥A2的车轮16、18分别——在此仅示意性示出地——被配设有摩擦制动设备20-1以及再生式制动设备20-2。机动车的全部的、可由摩擦制动设备20-1和再生式制动设备20-2产生的总制动力矩MB,Ges在此的值是:MB,Ges=1000Nm。
已知地,在此摩擦制动设备20-1的摩擦制动力矩分量以预先规定为固定的、恒定的摩擦力矩比例B1/B2的方式被分配至第一车桥A1和第二车桥A2。在此该摩擦力矩比例的值是:B1/B2=60%/40%=0.6/0.4。
通过调控单元22能够这样驱控这两个制动设备20-1、20-2,即总制动力矩以可预定的、即期望的制动力矩比例W1/W2分配在所述第一车桥A1和第二车桥A2上。在此所期望的制动力矩比例W1/W2=50%/50%=0.5/0.5。
根据本发明在此提出,提供期望的制动力矩比例W1/W2=0.5/0.5时,则在一个车桥上提供最小再生力矩MB,Rek,Min,对于所有行驶状况都保持将该最小再生力矩作为再生制动力矩分量设定在该车桥上。
根据本方法为此首先确定,在哪个车桥上要提供最小再生力矩MB,Rek,Min。
这通过比较W1和B1的值来实现。根据本方法,在此当W1<B1时应在第二车桥A2上提供最小再生力矩MB,Rek,Min,反之,当W1>B1时,应在第一车桥A1上提供最小再生力矩MB,Rek,Min。
由于——如所述那样——摩擦力矩比例B1/B2=0.6/0.4并且所述期望的制动力矩比例W1/W2=0.5/0.5,所以在此W1<B1且因此应在第二车桥A2上提供最小再生力矩MB,Rek,Min。
根据下式计算最小再生力矩MB,Rek,Min:
在此得出MB,Rek,Min=167Nm。
在接下来步骤中,根据本方法为这两个车桥计算余下的剩余摩擦力矩MB,Reib.Rest。
这使用下式:
在此得出MB,Reib.Rest=833Nm。
接下来计算还要在第二车桥A2上提供的剩余摩擦力矩MB,Reib,A2和在第一车桥A1上提供的剩余摩擦力矩MB,Reib,A1。
这在此适用下式:
MB,Reib,A2=MB,Reib,rest*B2
以及
MB,Reib,A1=MB,Reib,rest*B1
得出值MB,Reib,A2=333Nm以及MB,Reib,A1=500Nm。
利用调控单元22在此在要求制动的情况下相应驱控摩擦制动设备20-1和再生式制动设备20-2,使得在第二车桥A2上提供最小再生力矩MB,Rek,Min=167Nm和摩擦力矩MB,Reib,A2=333Nm,在第一车桥A1上提供摩擦力矩MB,Reib,A1=500Nm来作为制动力矩。
Claims (5)
1.一种用于控制制动***以在机动车的第一车桥(A1)和第二车桥(A2)之间设定总制动力矩分配的方法,其中所述制动***包括摩擦制动设备(20-1)和再生式制动设备(20-2),所述制动***具有总制动力矩MB,Ges,该总制动力矩MB,Ges包括摩擦制动设备(20-1)的摩擦制动力矩分量和再生式制动设备(20-2)的再生制动力矩分量,在要求制动的情况下,根据可预定的制动力矩比例W1/W2将该总制动力矩MB,Ges分配到第一车桥(A1)和第二车桥(A2)上,所述摩擦制动设备(20-1)的摩擦制动力矩分量(MB,Reib)通过恒定的摩擦制动力矩分配比例B1/B2被分配到第一车桥(A1)和第二车桥(A2)上,
其特征在于,
如果B1≠W1,则对于一个车桥而言确定最小再生力矩MB,Rek,Min,在这个车桥(A1、A2)上提供该最小再生力矩MB,Rek,Min,并且对于所有行驶状况都保持将该最小再生力矩MB,Rek,Min作为再生制动力矩分量设定在这个车桥(A1、A2)上。
2.根据权利要求1所述的方法,
其特征在于,
确定要为之提供最小再生力矩MB,Rek,Min的车桥(A1、A2),计算最小再生力矩MB,Rek,Min和余下的剩余摩擦力矩MB,Reib,rest,在考虑到要在所确定的车桥(A1、A2)上提供的最小再生力矩MB,Rek,Min的情况下提供期望的总制动力矩分配。
5.一种用于实施根据权利要求1至4中任一项所述的方法的制动***,包括摩擦制动设备(20-1)、再生式制动设备(20-2)以及用于以期望的制动力矩比例W1/W2在机动车的车桥(A1、A2)之间设定总制动力矩分配的调控单元(22),其中所述调控单元(22)被布置成,计算要在一个车桥(A1、A2)上提供的最小再生力矩MB,Rek,Min和余下的剩余摩擦力矩MB,Reib,rest,在考虑到要在该车桥(A1、A2)上提供的最小再生力矩MB,Rek,Min的情况下提供要以期望的制动力矩比例W1/W2来设置的总制动力矩分配,其中对于所有行驶状况都保持将该最小再生力矩MB,Rek,Min作为再生制动力矩分量设定在一个车桥(A1、A2)上。
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