CN106904166A - 用于操作机动车辆的方法 - Google Patents
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Abstract
本发明涉及一种用于操作机动车辆(2)的方法,其中‑确定机动车辆(2)的状态参数(ZP),‑评估该状态参数(ZP)从而确定机动车辆(2)的惯性滑行距离(FD),以及‑评估至少确定的惯性滑行距离(FD),从而产生变化操作模式的信号(B)。
Description
技术领域
本发明涉及用于操作机动车辆的方法。
背景技术
现代机动车辆的传动系——如第二代轻混合动力驱动器或具有电致动离合器(也称作电动离合器)的传动系——容许发动机在机动车辆惯性滑行阶段期间分离以及潜在地关闭,从而以这种方式不会以牵引力的形式损失机动车辆的动能。与发动机仅在机动车辆处于静止时才关闭的停止-启动系统的情况不同,其容许发动机在机动车辆惯性滑行的较早的时间关闭,例如到达红色交通灯时。然而,为了有效利用机动车辆的这种操作模式——该模式也被称作滑行——需要与惯性滑行距离相关的信息,即,预测机动车辆在滑行时能够覆盖的距离。
因此,存在对于呈现尽可能高效地产生向滑行操作模式的变化——即尽可能多地节省燃料并且因此也降低排放——的方式的需求。
发明内容
本发明的目的通过用于操作机动车辆的方法来实现,其中:
-确定机动车辆的状态参数,
-评估该状态参数从而确定机动车辆的惯性滑行距离,以及
-评估至少确定的惯性滑行距离,从而产生变化操作模式的信号。
确定机动车辆的状态参数容许直接或间接确定动能或它的动量,其限定在分离和潜在地关闭发动机之后车辆能够覆盖的最大惯性滑行距离,同时将能量损失纳入考量。换言之,确定机动车辆的状态参数容许预测在分离和潜在地关闭发动机之后车辆的潜在惯性滑行距离。根据该惯性滑行距离,然后产生变化操作模式的信号,从而从发动机运行的常规操作模式变化到发动机不运行的滑行操作模式。可以如通过光学和/或声学方式使第一机动车辆的驾驶员注意该变化操作模式的信号,或变化操作模式的信号自动地产生这样的变化。确定或预测的惯性滑行距离可以与阈值比较,并且响应于例如超出该阈值,那么机动车辆可以以滑行模式操作。在该情况下,该阈值可以是固定值或根据行驶情况确定,例如根据车辆速度。因此,仅在通过分离和关闭发动机实际节省燃料的情况下发生以滑行模式操作。因此,滑行模式操作特别有效地发生,即以这种方式节省燃料以及因此降低排放。
根据一个实施例,状态参数包含第一机动车辆的位置和/或速度和/或加速度和/或车辆重量和/或轮胎压力和/或制动压力和/或空气阻力。可以利用对应传感器来确定它们,例如转速计、加速度传感器以及其它传感器。可以利用廉价的加速度传感器尤其容易地测量加速度,加速度值之后例如一次或二次数值积分,从而确定车辆的速度和/或位置值或其变量表示。状态参数不仅用于确定在特定时间的行驶动态的状态,也用于作出关于行驶动态状态在特定时间会如何变化的预测,例如由于驾驶员使第一机动车辆加速或制动时。因此,为变化到滑行模式的决策提供改进的数据库。
根据进一步的实施例,确定和评估环境参数以确定惯性滑行距离。因此,进一步扩展关于变化到滑行模式的决策的数据库。
根据进一步的实施例,环境参数包含空气温度和/或风速和方向和/或道路的坡度。可以利用机动车辆的外部温度传感器测量如空气温度的环境数据或可以从数据源将例如风速和方向无线传输到机动车辆,或可以利用机动车辆的倾角计测量道路坡度或从机动车辆的导航系统中读取道路坡度。
根据进一步的实施例,在确定惯性滑行距离时将安全距离纳入考量。这使行驶至距离第二机动车辆太近最小化,并且因此最小化后端碰撞的风险。
根据进一步的实施例,确定在行驶方向上行驶在第一机动车辆前方的第二车辆的数据。所确定的在前方行驶的第二机动车辆的数据限定最大可行惯性滑行长度,也就是说,根据交通状况第一机动车辆通过滑行能够覆盖的距离。这容许甚至更有效地实现变化到滑行模式。
根据一个实施例,确定的数据包含与第二机动车辆的距离和/或第二机动车辆的位置和/或第二机动车辆的速度和/或第二机动车辆的加速度。这些数据不仅可以用于确立在特定时间与第二机动车辆的距离,也可以用于作出关于距离值在惯性滑行期间如何变化的预测,例如由于第二机动车辆被加速或制动。以这种方式,为了决定变化到滑行模式而提供改进的数据库。
根据进一步的实施例,通过第一车辆的前部传感器系统确定该确定的数据。因此,不考虑通信连接,确定的数据是可用的。可选地,这样的数据可以另外或可选地也从如交通监测系统无线地或通过C2C的通信方式传输到第一机动车辆。
根据进一步的实施例,前部传感器系统具有距离报警雷达和/或前部摄像机。这些部件可以例如分配给第一机动车辆的驾驶员辅助系统,例如交叉口交通辅助。因此回到第一机动车辆已经存在的部件也是可行的。
本发明也包括机动车辆以及也包括评估装置,该机动车辆包含用于确定惯性滑行距离以及用于评估至少惯性滑行距离和用于产生改变操作模式的信号的评估装置。
附图说明
现在根据附图说明本发明,附图中:
图1示出了交通情形,以及
图2示出了机动车辆的示例性实施例的示意性表示,该机动车辆被设计用于实施根据本发明的方法。
具体实施方式
首先参照图1。
图1示出了交通情形,其中第一机动车辆2沿行驶方向F在第二机动车辆4之后。在特定的时间,第二机动车辆4降低它的车速,例如由于接近红色交通灯或交通阻塞的末端。
在当前的示例性实施例中,第一机动车辆2具有轻混合动力驱动器或包含电子离合器的传动系,其在第一机动车辆2的惯性滑行阶段期间各自容许发动机分离并且潜在地关闭,从而不会以牵引力形式损失第一机动车辆2的动力能量。在这里可以将轻混合动力驱动器理解为意思是电动驱动辅助发动机以增加动力的传动系。而且,在再生制动系统中可以部分回收制动能量。
因此,第一机动车辆2被设计用于在常规操作模式和滑行模式之间变化,从而以这种方式在惯性滑行阶段期间以滑行模式通过分离和另外关闭发动机来节省燃料。为了仅在实际有意义——即产生燃料节约——的任何时候实施在这两个操作模式之间的变化,需要确定惯性滑行距离FD,该惯性滑行距离潜在地被减少安全距离SD,也就是说第一机动车辆2可以以滑行模式滑行的距离。
为了这个目的而设置评估装置8,在图2中示意性地表示了评估装置8并且评估装置8产生变化操作模式的信号B,从而从发动机运行的常规操作模式变化到发动机不运行的滑行操作模式。如当前的示例性实施例,可以例如通过光学和/或声学装置使变化操作模式的信号B引起第一机动车辆2的驾驶员的注意,或变化操作模式的信号B自动产生这样的变化。
在当前的示例性实施例中,评估装置8被连接到第一机动车辆2的前部传感器系统6,从而从前部传感器系统6向评估装置8传输数据D。
前部传感器系统6被设计用于确定第二车辆4的数据D,在行驶方向F上第二车辆4在第一机动车辆2前方行驶。在当前示例性实施例中,确定的数据D是与第二机动车辆4的距离以及第二机动车辆4的位置和速度以及加速度。在当前的示例性实施例中,第一车辆2的前部传感器系统6包含距离报警雷达和/或前部摄像机。
而且,在当前的示例性实施例中,评估装置8被设计用于读取状态参数ZP的数值,利用第一机动车辆2的传感器已经确定该状态参数值和/或已经存储该状态参数值。在当前的示例性实施例中,状态参照ZP包含第一机动车辆2的位置和速度以及加速度。在当前的示例性实施例中,状态参照ZP也包含第一机动车辆2的车辆重量和轮胎压力以及同样的制动压力和空气阻力。
而且,在当前的示例性实施例中,评估装置8被设置用于读取以及评估环境参数UP。在当前的示例性实施例中,环境参数UP包含温度和风速以及方向和道路的坡度。通过第一机动车辆2的外部温度传感器测量空气温度,风速和方向从如天气站的数据源无线传输到第一机动车辆2。另一方面,通过第一机动车辆2的倾角计测量或从第一机动车辆2的导航系统中读出行驶方向F上的道路坡度。
最后,在当前示例性实施例中,评估装置8被设计为在确定惯性滑行距离FD时将安全距离SD纳入考量,从而以这种方式最小化后端碰撞的风险。
为了实施这里所述的工作,在当前示例性实施例中,评估装置8包含硬件和/或软件部件。
在操作期间,评估装置8读取确定的数据D、环境参数UP和状态参照ZP,并且评估这些参数从而确定惯性滑行距离FD,惯性滑行距离被减少安全距离SD。
在当前的示例性实施例中,可以利用加速度传感器确定第一机动车辆2沿行驶方向F的加速度A,并与第一机动车辆2的质量或惯性M的值、空气阻力WL以及前进阻力WR一起地评估加速度A,从而确定惯性滑行距离FD,惯性滑行距离FD被减少安全距离SD。在该情况下,可以连续确定和更新这些数值,或通过计算机辅助模型连续确定这些数值。
为了确定被减少安全距离SD的惯性滑行距离FD,可以实施例如双重数值积分,该积分中不仅考虑第一机动车辆2的加速度A,也考虑质量或惯性M、空气阻力WL以及前进阻力WR:
FD-SD=∫∫1/M(A-WL-WR)dt2
所确定的惯性滑行距离FD与预定阈值S比较。如果所确定的惯性滑行距离FD超过阈值S,那么产生变化操作模式的信号。可以以这种方式确保仅在实际节省燃料的情况下实施分离和关闭发动机。
附图标记列表
2 第一机动车辆
4 第二机动车辆
6 前部传感器系统
8 评估装置
B 变化操作模式的信号
D 确定的数据
F 行驶方向
FD 惯性滑行距离
S 阈值
SD 安全距离
UP 环境参数
ZP 状态参数
Claims (11)
1.一种用于操作机动车辆(2)的方法,其中:
-确定所述机动车辆(2)的状态参数(ZP),
-评估所述状态参数(ZP),从而确定所述机动车辆(2)的惯性滑行距离(FD),以及
-评估至少所述确定的惯性滑行距离(FD),从而产生变化操作模式的信号(B)。
2.根据权利要求1所述的方法,
其中,
所述状态参数(ZP)包含所述第一机动车辆(2)的位置和/或速度和/或加速度和/或车辆重量和/或轮胎压力和/或制动压力和/或空气阻力。
3.根据权利要求1或2所述的方法,
其中,
确定并且评估环境参数(UP)以确定所述惯性滑行距离(FD)。
4.根据权利要求3所述的方法,
其中,
所述环境参数(UP)包含空气温度和/或风速和风向。
5.根据任一上述权利要求所述的方法,
其中,
在确定所述惯性滑行距离(FD)时将安全距离(SD)纳入考量。
6.根据任一上述权利要求所述的方法,
其中,
确定第二车辆(4)的数据(D),所述第二车辆(4)在行驶方向(F)上在所述第一机动车辆(2)的前方行驶。
7.根据权利要求6所述的方法,
其中,
确定的数据(D)包含与所述第二机动车辆(4)的距离和/或所述第二机动车辆(4)的位置和/或所述第二机动车辆(4)的速度和/或所述第二机动车辆(4)的加速度。
8.根据权利要求6或7所述的方法,
其中,
利用所述第一车辆(2)的前部传感器系统(6)确定所述确定的数据(D)。
9.根据权利要求8所述的方法,
其中,
所述前部传感器系统(6)包含距离报警雷达和/或前部摄像机。
10.一种包含评估装置(8)的机动车辆(2),所述评估装置(8)用于确定和评估至少一个惯性滑行距离(FD)以产生变化操作模式的信号(B)。
11.一种如权利要求9所述的用于确定惯性滑行距离(FD)并且评估至少一个所述惯性滑行距离(FD)以产生变化操作模式的信号(B)的评估装置(8)。
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US10451022B2 (en) | 2016-11-02 | 2019-10-22 | Paccar Inc | Intermittent restart for automatic engine stop start system |
US10690103B2 (en) | 2017-09-26 | 2020-06-23 | Paccar Inc | Systems and methods for using an electric motor in predictive and automatic engine stop-start systems |
US10487762B2 (en) | 2017-09-26 | 2019-11-26 | Paccar Inc | Systems and methods for predictive and automatic engine stop-start control |
US10883566B2 (en) | 2018-05-09 | 2021-01-05 | Paccar Inc | Systems and methods for reducing noise, vibration and/or harshness associated with cylinder deactivation in internal combustion engines |
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