CN110121452B - 用于控制具有自动化离合器的车辆的滑行运行的方法 - Google Patents
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Abstract
本发明涉及一种用于控制具有自动化离合器的车辆的滑行运行的方法,在该方法中,在接入挡位的情况下,为了进入滑行运行而断开离合器以便分离内燃机和驱动系,并且为了退出滑行运行而接合离合器。在自动调节滑行运行的方法中,根据驾驶员行为自动确定进入或退出滑行运行。
Description
技术领域
本发明涉及一种用于控制具有自动化离合器的车辆的滑行运行的方法,在该方法中,在接入挡位的情况下,为了进入滑行运行断开离合器以便分离内燃机和驱动系,并且为了退出滑行运行接合离合器。
背景技术
用于具有自动化离合器装置的机动车的控制方法是已知的,在控制方法中使车辆进入滑行运行。滑行理解为在车辆的推力阶段中有针对性地分开离合器,在推力阶段中不操作作为燃料供给测量元件的油门踏板。在这种情况下,车辆滑行,其中或者断开驱动车辆的发动机,或者以空转转速运行。在滑行模式下,在接入挡位的情况下通过电子控制单元断开离合器,从而车辆滑行,对此没有由于发动机的制动作用而损失动能。
DE 10 2013 219 345 A1公开了一种用于控制机动车的驱动单元的方法,该机动车具有驾驶员辅助系统、滑行装置和回收装置。在此,根据由驾驶员辅助系统检测到的且表征车辆环境的变量并且根据机动车的车载电源的工作状态确定一下行驶状态的顺序和/或行驶状态的时间关系:滑行-回收-制动-推力切断。在此不利的是,仅以非常短的时间依次进行多个滑行过程。而驾驶员认为这是不舒适的。
发明内容
因此,本发明的目的是,提供一种用于控制车辆的滑行运行的方法,在该方法中没有因为滑行过程损害行驶舒适性。
根据本发明,该目的通过以下方式实现,即,根据驾驶员行为自动地确定进入和/或退出滑行运行。这具有的优点是,由于匹配了当前的行驶状况而顾及到了驾驶员期望,并因此没有由于滑行运行而不利地影响行驶舒适性。
有利地,根据预先给定的制动措施退出滑行运行。因为只是进行特定的用于退出滑行运行的制动措施,滑行运行的持续时间最大,这使得车辆的燃料消耗最小。因此,车辆可滑行更长的时间,因为没有通过动力系统抑制速度。
在一种实施方式中,预先给定的制动措施作为紧急制动。由此仅在紧急情况下中断车辆的滑行运行。
在替代方案中,在制动缸压力低于预先给定的压力阈值时进行预先给定的制动措施。低于压力阈值表示车辆可能有危险状况。在断开内燃机的情况下重复制动措施会导致,制动缸压力始终越来越低。因此在此立刻退出滑行,以便额外地通过动力系统制动车辆或可加载制动缸压力。
有利地,在切断内燃机的情况下,所有制动措施的总时长超过预先给定的时长时,进行预先给定的制动措施。
在一种实施方式中,通过驾驶操作确定车辆的当前行驶状况,其中,在车辆转弯并且当前的转弯曲率超过特定的曲率阈值时,中断进入滑行运行。因此在急转弯和/或弯度大的转弯时不允许滑行运行。
在一种变型方案中,通过车辆加速度确定车辆的当前行驶状况,其中,在当前的车辆加速度低于第一加速度阈值时进入滑行运行,而在当前的车辆加速度超过第二加速度阈值时退出滑行运行。因此只有在最佳的车辆加速度情况下并且在合适的驾驶操作下执行滑行运行,从而持续确保行驶舒适性或行驶安全性。
在一种实施方式中,由至少一个车轮转速确定车辆的当前车辆加速度,其中,在车辆上坡和/或下坡行驶时,基于由车轮转速确定的车辆加速度中断滑行运行。在负的车辆加速度过高时进入特别具有切断的内燃机的滑行运行是无效的且不舒服的,因为车辆必须再次快速加速,以便进入正常的行驶运行。与此相对,在正的车辆加速度过高时中断滑行运行,以防止危险情况。因此确保,在陡峭下坡道路的情况下或在陡峭上坡道路的情况下不会进行滑行运行。通过借助车轮转速来探测车辆加速度,可省去单独的加速度传感器,这简化了方法的实施并且降低了成本。
在一种实施方式中,在线地确定驾驶员行为。通过观察驾驶员行为仅在合适的交通状况下允许滑行。通过在线评估,调节驾驶员对滑行模式下的行驶情况或交通情况的反应。对此尤其考虑,驾驶员何时且以何种频率退出滑行运行。在该实施方式中,可取消对驾驶员特征的存储。
在特别简单的实施方式中,评估在经过的时间段中的驾驶员行为。
为了实现滑行运行的尽可能快速的匹配,将驾驶员行为与个性化的驾驶员特征相结合。在此,在通过存储的驾驶员特征告知车辆哪个驾驶员进行该行驶运行时,滑行特征优选可匹配不同的车辆驾驶员。
附图说明
本发明提供多种实施方式。其中的多个根据在附图中示出的图示进行详细阐述。其中示出:
图1示出了在制动过程中用于结束滑行过程的实施例,
图2示出了在预先给定加速时用于滑行过程的实施例,
图3示出了在合适的交通状况下用于滑行过程的实施例。
具体实施方式
在现代化的车辆中,在挂入挡位的情况下尤其在车辆行驶期间自动地断开离合器,这称为滑行。在此有额外选择,即,在滑行阶段中断开内燃机。滑行的目的是使内燃机与驱动系分离,以避免其拖曳力矩作为损耗力矩,这实现了燃料节省。
在附图中示出了用于优化自动进入滑行过程或自动退出滑行过程的各种实施例,其中,在车辆的行驶运行期间滑行过程特别有效。
在图1中示出了在制动时用于结束滑行过程的实施例。在此,图1a示出了在时间t上的车辆速度v。在此,曲线A示出了在滑行过程期间的轻松的制动过程,而曲线B示出了在连接驱动系时的制动过程。在这种情况下,滑行过程仅可通过预先给定的制动措施中断,例如在紧急制动时或在制动缸压力低的情况下,因为相比于在滑行过程期间的轻松制动情况,在连接驱动系的情况下车辆的速度更急速地降低。通过在滑行过程期间的轻松制动使得滑行过程的持续时间最大,由此同时使燃料消耗最小。通过在曲线A中看出的仅少量降低的车辆速度使得车辆能够缓慢行驶较长的路程。
图1b示出了在时间t上的燃料消耗KV,其中,曲线C示出了在内燃机空转时的燃料消耗,而在内燃机断开时没有燃料消耗,这例如发生在滑行期间。相比于在没有推力切断的情况使用车辆,在制动期间只要滑行运行是激活的,则没有燃料消耗。
在图2中示出了根据本发明的方法的实施方式,在其中仅在车辆最佳的加速度时进行滑行过程。在此示出了在路程s上的高度轮廓HP。在此用D表示的矩形显示原则上禁止滑行的区域。在此涉及与陡峭的道路上坡连接的陡峭的下坡行驶。为了防止在该区域中滑行,仅根据最佳的车辆加速度起动或结束滑行。即,仅在道路的高度轮廓有微小改变的区域中允许滑行。对此,根据车辆加速度得出高度轮廓HP。如果车辆加速度超过第一加速度阈值,则假设车辆处于陡峭的下坡道路区段上并因此出现不允许的车辆加速度。因此,仅在低于预先给定的第一加速度阈值时允许滑行。如果车辆处于陡峭上坡行驶,则仅在车辆位于其具有的加速度超过第二加速度阈值的区段上时才允许滑行。在低于第二加速度阈值的区域中假设,基于设定的滑行特征,车辆在上坡时变缓慢并因此不能靠自身的力达到顶部。在此,加速度值尤其通过车辆的车轮转速得出。基于该设计方案,根据驾驶员需要调节进入或退出滑行过程。
图3示出了根据本发明的方法的另一实施例,其中仅在合适的交通状况下允许滑行。为了探测合适的交通状况,通过驾驶员动作在线地辨别出行驶状况并且对其评估,其中,由经评估的驾驶员动作使滑行特征适配交通状况。在驾驶员动作的在线辨别中尤其确定,驾驶员已经退出滑行过程的频率。在图3a中在时间t上示出了车辆速度v。因为在此存在均匀的车辆速度v,可根据驾驶员行为简单调节滑行策略。
在图3b同样示出了在时间t上的车辆速度,其中,车辆速度有非常大的波动。在位于矩形F之前的区域E中,驾驶员尝试滑行。在该区域中的滑行过程非常短,这是违背当前的交通状况和/或驾驶员愿望的。为了可相应地调节滑行过程,观察在预先给定的x秒的时间段中的驾驶员行为。
基于以短暂时间频繁中断的滑行过程,在通过矩形F示出的区域中不允许滑行过程。只有在退出矩形F之后,在车辆速度又基本恒定的区域G中才允许进入滑行过程,因为在过去y秒中的驾驶员行为显示出基本均匀的走向。
Claims (8)
1.一种用于控制具有自动化离合器的车辆的滑行运行的方法,在所述方法中,在接入挡位的情况下,为了进入所述滑行运行而断开所述离合器,以便分离内燃机和驱动系,并且为了退出所述滑行运行而接合所述离合器,其特征在于,根据驾驶员行为自动地确定进入或退出所述滑行运行;
其中,通过车辆加速度确定所述车辆的行驶状况,其中,在当前的车辆加速度低于第一加速度阈值时进入所述滑行运行,在当前的车辆加速度超过第二加速度阈值时进入所述滑行运行;
其中,由至少一个车轮转速确定所述车辆的当前车辆加速度,其中,在所述车辆上坡和/或下坡行驶时,基于由所述车轮转速确定的车辆加速度中断所述滑行运行。
2.根据权利要求1所述的方法,其特征在于,根据预先给定的制动措施退出所述滑行运行。
3.根据权利要求2所述的方法,其特征在于,所述预先给定的制动措施作为紧急制动。
4.根据权利要求2所述的方法,其特征在于,在制动缸压力低于预先给定的压力阈值时或在切断所述内燃机的情况下所有制动措施的总时长超过预先给定的时长时,进行所述预先给定的制动措施。
5.根据权利要求1至4中任一项所述的方法,其特征在于,通过驾驶操作确定所述车辆的当前行驶状况,其中,在所述车辆转弯并且当前的转弯曲率超过特定的曲率阈值时,中断进入所述滑行运行。
6.根据权利要求1所述的方法,其特征在于,在线地确定所述驾驶员行为。
7.根据权利要求1所述的方法,其特征在于,评估在经过的时间段中的驾驶员行为。
8.根据权利要求6或7所述的方法,其特征在于,将所述驾驶员行为与个性化的驾驶员特征相结合。
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CN110920615A (zh) * | 2019-12-17 | 2020-03-27 | 浙江吉利汽车研究院有限公司 | 一种用于退出车辆航行功能的方法 |
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