CN111247022A - 用于可电动运行的机动车的具有行驶级选择装置的驱动控制*** - Google Patents
用于可电动运行的机动车的具有行驶级选择装置的驱动控制*** Download PDFInfo
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Abstract
本发明涉及一种用于可电动运行的机动车的驱动控制***,具有行驶级选择装置和电子控制单元,所述电子控制单元与所述行驶级选择装置连接并且被设计使得:在选择了第一备选自动行驶级时可预定相对高的不可任意选择的再生水平(优选最大可能的再生水平)并且爬行功能被解除,而在选择了第二备选自动行驶级时可预定至少一个恒定的再生水平或可预定巡航运行并且爬行功能被激活。
Description
技术领域
本发明涉及一种用于可电动运行的机动车的驱动控制***,该驱动控制***具有行驶级选择装置和电子加速踏板。
背景技术
电动车中所谓的具有电子加速踏板的“单踏板感觉(One-Pedal-Feeling)”在松开加速踏板时负责实现强烈的可自发计量的减速直至几乎进入静止状态,该“单踏板感觉”尤其是宝马(BMW)i3的一个特征。此外,日产(Nissan)宣布“日产Leaf”将具有类似于宝马i3(electrive.net,20.07.2017)的e踏板。
用于电动车制动的不同再生方法例如由DE 10 2010 004 846 A1、DE 10 2013 211 716 A1和DE 10 2005 058 829 A1已知。
发明内容
本发明基于如下任务,即,进一步改善对电驱动时的再生性能的调节。
按照本发明,该任务通过权利要求1的特征来解决。在从属权利要求中给出本发明的优选进一步扩展方案。
本发明涉及一种用于可电动运行的机动车的驱动控制***,该驱动控制***具有行驶级选择装置和电子控制单元,所述电子控制单元与所述行驶级选择装置连接并且被设计使得:在选择了第一备选自动行驶级时可预定相对高的不可任意选择的再生水平(优选最大可能的再生水平)并且爬行功能被解除,而在选择了第二备选自动行驶级时可预定至少一个固定的再生水平或可预定巡航运行(Segelbetreib)并且爬行功能被激活。
在本发明的一种进一步扩展方案中,在选择了第一备选自动行驶级时可选择至少一个相对高的再生水平,而在选择了第二备选自动行驶级时可选择至少一个相对低的再生水平,这样使得在第二备选自动功能中的再生水平始终等于或低于在第一备选自动功能中的再生水平。
用于选择第一备选自动行驶级或第二备选自动行驶级的行驶级选择装置优选为选择杆,该选择杆为此具有自主复位的转换按键或手动可逆的切换开关。
在选择了第一备选自动行驶级时,即使加速踏板和制动踏板未***作,在静止状态下车辆的滚动离开也优选始终被阻止。在存在可切换(亦即可手动激活和解除)的自动保持动能“Auto-H”时,当车辆从行驶运行转变到静止状态时,保持功能的切换状态被忽视。换言之,无论保持功能被激活还是保持功能被解除,在静止状态下车辆的滚动离开均被阻止。
在选择了第二备选自动行驶级时,即使加速踏板和制动踏板未***作,在静止状态下车辆的向后滚动也始终被阻止,然而前向滚动被允许。在存在上述提及的可切换的保持功能(Auto-H)时,即使加速踏板和制动踏板未***作,在静止状态下车辆的向后滚动也始终(亦即,无论保持功能被激活还是保持功能被解除)被阻止。然而,仅当保持功能(Auto-H)被解除时,向前滚动才被允许。
本发明基于下列构思:
用于能量回收的推进再生(Schubrekuperation)可以持久地设定或根据情形能设定为多个级。
在具有内燃发动机式驱动装置的车辆中,在松开加速踏板时同样存在减速,但比在上述提及的电动车中具有明显更小的减速。该减速在缓慢行驶时转变直至所谓的爬行速度,该爬行速度能够在不操作加速踏板的情况下实现以步行速度的行驶。特别是在调车和停车时,爬行功能是有利的。在此,例如在急停再走(Stop&Go)的交通中或在斜坡中,宝马的所谓自动保持功能有助于防止滚动。该功能相当于当车辆从行驶运行转变到静止状态时例如经由操作元件可切换的自动保持功能(Auto-H)。
单踏板感觉是习惯需要的。进一步利用制动踏板的需要是流行的。此外,虽然这在城市中是有利的,但是在高速上长途疲劳行驶时要保持油门踏板,以便防止强烈减速。
本发明的目标是,通过引入新的备选于在自动变速车辆中常见的行驶级“D”的可选的附加行驶级,在此在可电动行驶的车辆中称为“i”,将具有内燃发动机的车辆和具有单踏板感觉的电动车(例如宝马i3)的行驶方式的优点结合,并且让客户决定当前应该使用何种行驶方式。
在该新的行驶级(“i”)中,爬行功能基本上始终被解除并且再生水平高、优选最大并且不可任意选择。车辆在静止状态下的无意滚动离开通过始终激活的可靠的保持而被阻止。自动保持按键针对行驶级D被保留,以便在需要时手动禁止爬行功能。针对行驶级“D”中的再生设计,再生等级、必要时包括SRA(巡航再生助手)在内优选可以由驾驶员例如经由显示操作单元(例如宝马的iDrive)任意配置。驾驶员例如具有在SRA或优选的可多级调节的再生水平(例如高/中/低)之间的选择。利用SRA(例如利用相机、雷达和导航数据),车辆根据交通情况自动选择正确的推进减速。
术语“备选自动行驶级”不仅被理解为变速器自切换的行驶级,也被理解为具有固定传动比的行驶级。
本发明带来下列优点:
-客户多元价值
-电驱动装置中的多个驱动特征的组合
-驾驶员可以情况特定地在两种驱动特征之间进行转换
-再生水平可以灵活地调节
-简单的操作
-在没有制动操作的情况下在行驶级“i”中始终可靠的保持。
附图说明
本发明的实施例在附图中阐明并且在下面更详细地描述。其中:
图1在示意图中示出关于按照本发明的驱动***的主要元件的概览图,其中选择了第一行驶级,
图2在示意图中示出关于按照本发明的驱动***的主要元件的概览图,其中选择了第二行驶级和可选地可配置的再生水平,
图3在示意图中示出关于按照本发明的驱动***的主要元件的概览图,其中选择了第二行驶级和可选的SRA,
图4示出行驶级相关的功能从静止状态出发的可能变换的状态流程图。
具体实施方式
在图1至3中,示出用于可电动运行的机动车的驱动控制***,该驱动控制***具有电子控制单元2,该电子控制单元与行驶级选择杆1形式的行驶级选择装置、显示操作单元3和用于激活和解除以上提及的保持功能(Auto-H)的自动保持按键5连接。
电子控制单元2尤其是通过相应编程的软件模块4这样设计,使得原则上在随着加速踏板的松开而选择了第一备选自动行驶级“i”时设定相对高的(优选最大的)再生水平并且爬行功能被解除(图1),而在随着加速踏板的松开而选择了第二备选自动行驶级“D”时可预定至少一个可选择的固定的再生水平或可预定(尤其是自适应的)巡航运行并且爬行功能被激活(图2或图3)。优选地,在第二备选自动行驶级“D”中仅可以选择等于或小于在第一备选自动行驶级“i”中预定的再生水平的再生水平。
更确切地说,在控制单元2中的软件模块4根据在此以行驶级选择杆1形式的行驶级选择装置的按照预定切换策略(在此:R-N-“D”或备选地“i”)的信号并且根据显示操作单元3和/或自动保持按键5的信号,优选实施下列功能:
在选择了第一行驶级“i”(图1)时:
爬行功能始终被解除并且再生水平大于或等于在第二行驶级“D”中的最高再生水平。
在存在自动保持按键“Auto-H”时,与是否操作该按键无关地,在加速踏板被松开时,在静止状态下车辆的滚动离开始终被阻止。
在备选地选择了第二行驶级“D”(图2和图3)时:
爬行功能始终被激活并且再生水平最大与在第一行驶级“i”中的再生水平一样高。
自动保持按键“Auto-H”可以被保留。如果功能Auto-H例如经由该按键被激活,则车辆随着达到静止状态如常见的那样自动被保持以防向前和向后滚动。爬行功能然后被禁止。如果功能Auto-H例如经由该按键被解除或者该功能甚至不存在,则车辆随着达到静止状态仅自动被保持以防向后滚动。爬行功能未被禁止。
在选择了向后行驶级“R”时,该功能类似地进行:如果功能Auto-H例如经由该按键被解除或者该功能甚至不存在,则车辆随着达到静止状态仅自动被保持以防向前滚动。爬行功能未被禁止。
针对在行驶级“D”中的再生设计,再生等级、必要时包括SRA(巡航再生助手)在内优选可以由驾驶员例如经由显示操作单元3配置。驾驶员例如具有在巡航再生助手SRA(图3)或优选的可固定设定的再生水平(在此例如为高/中/低;图2)之间的选择。利用SRA(经由相机、雷达和导航数据),车辆根据交通情况自动选择正确的推进减速。
因此,本发明在电驱动的范围内要么涉及单踏板感觉(A),要么涉及具有自动变速器和Auto-H功能的内燃发动机式车辆的驾驶感觉(B):
A)
1.在松开加速踏板时强烈减速
2.没有爬行功能,减速直至静止状态或至少几乎直至静止状态
-没有Auto-H(必要时),始终可靠地保持在静止状态下,即使没有操作制动踏板
B)
1.在松开加速踏板时较小减速
2.爬行功能,减速直至爬行速度
-用于防止在静止状态下的滚动离开并且禁止爬行力矩的Auto-H,其中,在解除Auto-H时,仅阻止车辆相应地沿过去的行驶方向的反方向滚动离开。
在图4中示意性地示出用于阻止无意的滚动离开的功能转变。在此关注从中间状态Z1至Z3到静止状态(v=0)的转变(静止状态管理功能)。
中间状态Z1在功能上是配属于第二行驶级“D”的保持状态。中间状态Z2在功能上是配属于空挡位置“N”的保持状态。中间状态Z3在功能上是配属于倒挡“R”的保持状态。
如果在行驶级“i”下达到了静止状态(v=0)并且驾驶员此后在没有操作制动踏板的情况下以步骤100选择了行驶级“D”,则车辆首先出于安全原因保持在中间状态Z1下,直至加速踏板或制动踏板按照步骤101***作。此后,在行驶级D中爬行功能被激活。
如果在中间状态Z1下以接着的步骤102再次切换回到行驶级“i”,则在行驶级“i”中可以随着加速踏板的操作而继续行驶。
如果在行驶级“i”中达到了静止状态(v=0)并且驾驶员此后以步骤103选择了行驶级“N”,则车辆首先出于安全原因保持在中间状态Z2下,直至制动踏板按照步骤104***作。此后可以转变到常见的配属于行驶级“N”的运行。
(箭头105目前未设置)
如果在中间状态Z2中制动器被短暂踩下,则此后允许自由的滚动。
如果在行驶级“i”下达到了静止状态(v=0)并且驾驶员此后在没有操作制动踏板的情况下以步骤106选择了行驶级“R”,则车辆首先出于安全原因保持在中间状态Z3下,直至加速踏板或制动踏板按照步骤107***作。此后,在行驶级R中,爬行功能被激活。
如果在中间状态Z3下以接着的步骤108再次切换回到行驶级“i”,则在行驶级“i”中可以随着加速踏板的操作而继续行驶。
如果在中间状态Z1下以步骤109选择行驶级“N”,则转变到中间状态Z2。
如果在中间状态Z2下以步骤110选择行驶级“D”,则转变到中间状态Z1。
如果在中间状态Z1下以步骤111选择行驶级“R”,则转变到中间状态Z3。
如果在中间状态Z3下以步骤112选择行驶级“D”,则转变到中间状态Z1。
如果在中间状态Z2下以步骤113选择行驶级“R”,则转变到中间状态Z3。
如果在中间状态Z3下以步骤114选择行驶级“N”,则转变到中间状态Z2。
Claims (10)
1.用于可电动运行的机动车的驱动控制***,所述驱动控制***具有行驶级选择装置(1)和电子控制单元(2、4),所述电子控制单元与所述行驶级选择装置(1)连接并且被设计使得:在选择了第一备选自动行驶级(i)时能预定相对高的不可任意选择的再生水平并且爬行功能被解除,而在选择了第二备选自动行驶级(D)时能预定固定的再生水平或能预定巡航运行并且爬行功能被激活。
2.根据权利要求1所述的驱动控制***,其特征在于,用于选择所述第一备选自动行驶级(i)或所述第二备选自动行驶级(D)的行驶级选择装置(1)具有自主复位的转换按键或手动可逆的切换开关。
3.根据上述权利要求中任一项所述的驱动控制***,其特征在于,在选择了所述第一备选自动行驶级(i)时,即使加速踏板和制动踏板未***作,在静止状态下车辆的滚动离开也始终被阻止。
4.根据上述权利要求中任一项所述的驱动控制***,其特征在于,在选择了所述第二备选自动行驶级(D)时,即使加速踏板和制动踏板未***作,在静止状态下车辆的向后滚动也始终被阻止。
5.根据上述权利要求中任一项所述的驱动控制***,其特征在于,在选择了所述第二备选自动行驶级(D)时并且在存在用于可切换的自动保持功能(Auto-H)的操作元件(5)时,在达到静止状态时,与所述操作元件(5)的操作无关地,即使加速踏板和制动踏板未***作,在静止状态下车辆的向后滚动也被阻止,然而当所述保持功能(Auto-H)经由所述操作元件(5)被解除(关闭)时,向前滚动被允许。
6.根据上述权利要求中任一项所述的驱动控制***,其特征在于,在选择了向后行驶级(R)时并且在存在用于可切换的自动保持功能(Auto-H)的操作元件(5)时,在达到静止状态时,即使加速踏板和制动踏板未***作,在静止状态下车辆的向前滚动被阻止,然而当所述保持功能(Auto-H)经由所述操作元件(5)被解除(关闭)时,向后滚动被允许。
7.根据上述权利要求中任一项所述的驱动控制***,其特征在于,设有显示操作单元(3),通过该显示操作单元在选择了所述第二备选自动行驶级(D)时能确定期望的再生水平(高、中、低)。
8.根据上述权利要求中任一项所述的驱动控制***,其特征在于,设有显示操作单元(3),通过该显示操作单元能确定期望的再生水平(高、中、低),其中,在选择了所述第一备选自动行驶级(i)时再生水平至少等于在选择了所述第二备选自动行驶级(D)时能确定的最高再生水平。
9.根据上述权利要求中任一项所述的驱动控制***,其特征在于,通过相应设计所述控制单元(2、4),在离开所述第一备选自动行驶级(i)时在车辆静止期间(v=0)能激活用于阻止无意滚动离开的静止状态管理功能,通过所述静止状态管理功能仅在操作了制动踏板和/或行驶踏板之后才允许继续行驶。
10.一种软件功能模块(3),所述软件功能模块应用于用于实施按照上述权利要求中任一项所述的方法的电子控制单元(2)。
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