CN102383954A - 用于识别内燃机自主运行的方法及装置 - Google Patents
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Abstract
本发明涉及用于识别内燃机自主运行和/或起动/停止的方法,其中为了识别该自主运行对表征燃烧过程的内燃机(1)的参数、尤其压力变化或振动进行分析。
Description
技术领域
本发明涉及用于识别内燃机自主运行的方法,该内燃机借助一个起动辅助装置由其静止位置起动,本发明还涉及用于实施该方法的装置。
背景技术
机动车的内燃机不能够自主地开始其有效的运行。出于该原因在传统的机动车上内燃机由一个电驱动的起动机带动至运行。与起动机的操作同时地开始内燃机所需的燃烧混合物形成、燃烧、转速检测与燃料注入检测的过程。当内燃机的转速高于起动机的转速或当内燃机的转速超过一个确定的阈值时,则识别出内燃机的自主运行。如果内燃机开始了其独立的运行,则起动机将与内燃机脱耦。
在具有一个内燃机及一个电动机形式的两个驱动机的混合动力***中,内燃机可通过电动机或起动机来起动。借助这种混合驱动装置内燃机可以从机动车的静止位置开始起动。但在用电动机作为驱动装置的纯电动行驶期间也允许内燃机的起动。电动行驶到混合动力行驶之间的过渡-在该过渡时由电动机或起动机起动内燃机及然后机动车由电动机及内燃机来驱动-可如下地导入:使一个设置在内燃机与电动机之间的隔离离合器闭合及由电动机一直拖动内燃机起动,直到内燃机达到自主运行为止。
另一可能性在于:在内燃机与电动机之间的隔离离合器首先为打开。在机动车行驶期间隔离离合器以比例式离合器的形式滑动地或借助冲击式离合器或比例式离合器冲击地闭合。在所述情况下由内燃机的转速分析不能得到有关内燃机是否自主运行的结论,因为内燃机可被电动机拖动而一起运行。
发明内容
因此本发明的任务在于,对于内燃机的负载情况(例如由电动行驶过渡到混合动力行驶或具有再生要求的混合动力行驶)也能可靠地识别内燃机的自主运行。
根据本发明该任务将这样来解决:为了识别内燃机的自主运行对表征燃烧过程的参数、尤其压力变化和/或振动进行分析。这具有其优点,即可使用一个仅由内燃机的工作原理引起的信号。在此情况下不可能受到电动机的影响,因为考虑用这样的信号来判断内燃机的自主运行,该信号由内燃机中通过其主动运行引起的燃烧过程所产生。
在一个方案中对一个设置在内燃机上的爆震传感器的信号进行分析。使用爆震传感器来识别内燃机的自主运行在此情况下将动用本身已安装在内燃机上的传感器,该传感器检测由内燃机引起的内燃机壳体上的固体声振动。并且用于爆震传感器信号的相应的电子分析单元也已在机动车中存在,以致对于该方法的实施可取消附加的硬件形式的部件。仅是软件的改变允许对爆震传感器信号在内燃机的自主运行方面分析。
有利地将爆震传感器的信号与一个预给定的参考范围相比较及当爆震传感器的信号落在预给定的参考范围中时,则识别为内燃机的自主运行。通过参考范围的选择可保证:该信号仅可取这样的值,它们对于内燃机内的正常燃烧过程是典型的值。爆震传感器的过振动信号在这里将考虑是不可靠的,该过振动信号尤其通过燃烧产生,它不是通过火花塞的点火功能引起的及在内燃机中产生高的压力上升。
在一个构型中爆震传感器的信号在其振幅方面和/或在其频率方面被分析。因此使用振幅或频率来考察振动的特性,它们典型地表征信号的波形。在此情况下为了与爆震传感器的信号比较对于每个振幅或对于每个频率预给定了一个自身的参考范围,由此其振幅与一个振幅参考范围相比较及其频率与一个频率参考范围相比较。
在一个方案中发动机控制装置为了起动内燃机将一个信号输出给起动辅助装置及计算至少一个用于内燃机的、在内燃机上被调节的控制参数,其中测量被起动的内燃机的至少一个控制参数并当被测量的控制参数具有大于零的值时对爆震传感器的信号分析。通过该控制参数的附加分析可检验安装在内燃机上的致动器的功能,由此可确定内燃机是否真正处于自主运行中。
通过发动机控制装置调节及测量的控制参数尤其涉及内燃机的喷射和/或点火。借助这些控制参数在调节燃料注入的情况下可充分地控制内燃机内的燃烧过程。详细地,控制参数可作为喷射时间、点火时刻或应进行点火时的曲轴角度来构成。用于确定这些控制参数的方法被存储在发动机控制装置中及不必作附加的开发,由此节省了开发的时间。
在一个进一步构型中爆震传感器的信号在分析前被滤波。由此使该信号消除了噪音,以致可进行爆震传感器信号的精确分析。
有利地当内燃机的两个控制参数的一个值不等于零及至少一个被测量信号的值在相应的参考范围以外时则推断出内燃机中一个调节控制参数的致动器的故障。在此情况下将识别为内燃机的非自主运行。
在一个实施形式中当识别出内燃机的非自主运行时则限制或禁止内燃机和/或整个***的预给定工作状态。负载点移动与机动车的起动/停止功能关闭一样地属于这类工作状态。
在一个特别简单的方案中借助内燃机的自主运行来识别内燃机的起动或停止。
本发明的另一构型涉及用于识别内燃机自主运行的装置,该装置对一个起动辅助装置输出一个用于内燃机由其静止位置起动的信号。为了在内燃机起动后可靠地识别内燃机的自主运行,设有一个装置,它为了识别内燃机的自主运行对表征燃烧过程的参数、尤其压力变化或振动进行分析。由此仅考虑用这样的信号来识别内燃机的起动,该信号仅由内燃机中在燃烧过程期间产生及不受起动辅助装置的影响。
尤其在内燃机成功起动的情况下该装置由一个爆震传感器接收一个信号并分析。通过使用本身在内燃机上已存在的传感器可降低成本。
起动辅助装置有利地被构成起动机或混合动力机动车的电动机。由此根据本发明的方法既可使用在传统的机动车中也可使用在混合动力的机动车中。
本发明允许有很多的实施形式。以下借助附图中所示的视图来详细地描述其中的一个实施形式。
附图说明
图1:一个混合动力***的原理图,
图2:用于识别内燃机自主运行的一个流程图。
具体实施方式
图1中表示一个机动车中的混合动力驱动装置的原理图。一个内燃机1通过一个驱动轴2与一个电动机3连接。电动机3设置在机动车的传动路径的驱动轴2上。在内燃机1与电动机3之间设有一个隔离离合器4,该离合器在打开状态中仅允许机动车使用电动机3的纯电动行驶。电动机3被导至一个变速器5上,该变速器与一个差动装置6相邻接,机动车轮子8由该差动装置来驱动。
在电动机3与变速器5之间设有另一离合器9,当机动车由静止位置过渡到行驶状态时,该离合器用于机动车的起动及由机动车驾驶员来操作。此外在内燃机1上配置了一个爆震传感器10,该传感器与一个控制装置11相连接,该控制装置还连接到电动机3上。
混合动力机动车通常在机动车静止位置时用电动机3来起动,以致它首先为纯电驱动。在混合动力机动车上待调节的功率由驾驶员通过行对驶踏板的操作来预给定。如果电动机3输出的功率不再够用于满足行驶要求,则控制装置11将决定:应起动迄今处于静止位置中的内燃机1。在此时刻设置在内燃机1与电动机3之间的、也是与控制装置11相连接的隔离离合器4被闭合。在此情况下电动机3通过闭合的隔离离合器4将一个旋转运动传递到迄今仍处于静止位置的驱动轴2上,并由此传递到内燃机1上。同时电动机3的功率受控制装置11的要求而提高,由此电动机3也可相应地拖动内燃机1的载荷。此外控制装置11在该时刻计算用于喷射的控制参数,例如喷射阀的喷射时间及点火时刻或内燃机1的各个汽缸应进行点火的曲轴角度。
现在为了确定内燃机2是否也自主运行,将在控制装置11中起动一个控制流程,该控制流程被表示在图2中。在框100的信号处理中接收爆震传感器10的输出信号101并对其分析。该输出信号101在信号处理(框100)中通过合适的滤波器被这样地处理,即输出信号101被消除噪音及可导致分析信号109及110的形式的分析。在此情况下由爆震传感器10提供的输出信号101被区分为振幅分析信号109(框102)及频率分析信号110(框103)。视分析的形式而定既可考虑用框102的振幅分析信号109或框103的频率分析信号110也可用这两个信号类型来判断内燃机1的自主运行。
框102中所提供的振幅分析信号109或框103中所提供的频率分析信号110被导入一个信号分析的框104。在框104中的信号分析作为输入信号105接收关于在自主运行的内燃机1中测量出的喷射或点火的信息。该输入信号105表征内燃机1的状态及可为曲轴角度,点火时刻或喷射时间。
如果该输入信号105为一个大于零的值,则执行信号分析。在信号分析时将振幅分析信号109与一个振幅参考范围相比较及将频率分析信号110与一个频率参考范围相比较。如果由爆震传感器10提供的振幅106a或频率值106b位于相应的振幅参考范围或频率参考范围中,则归因于:内燃机1不仅自主地进行其运行,而且也工作在一个正确的工作状态中。
但如果在框104的信号分析中确定出:至少一个作为喷射或点火的输入参数来提供的输入信号105等于零,则在框107中执行一个诊断或过渡到一个错误处理。如果输入信号105不等于零,则振幅分析信号109和/或频率分析信号110被考虑用来诊断自主运行的内燃机(1)。如果振幅分析信号109和/或频率分析信号110处于相应的参考范围以外,则在框107中执行一个诊断或过渡到一个错误处理。在诊断结果中将不再执行一些工作状态如负载点移动和/或机动车的起动/停止功能。
基于根据本发明的方法不仅能可靠地查明内燃机的起动,而且可确定出内燃机的停止。在此情况下无需对内燃机1通过电动机3起动或由纯电动行驶过渡到混合动力工作的起动的不同模式作进一步明确的考察。其后果是分析逻辑可保持简单。基于爆震传感器10的信号可对于内燃机1的自主运行及停止作出精确的说明。
Claims (13)
1.用于识别内燃机自主运行的方法,该内燃机借助一个起动辅助装置(3)由其静止位置起动,其特征在于:为了识别该内燃机(1)的自主运行对表征燃烧过程的参数、尤其压力变化或振动进行分析。
2.根据权利要求1的方法,其特征在于:为了识别该自主运行对设置在该内燃机(1)上的爆震传感器(10)的信号(109,110)进行分析。
3.根据权利要求2的方法,其特征在于:将该爆震传感器(10)的信号(109,110)与一个预给定的参考范围相比较,当该爆震传感器(10)的信号(109,110)落在该预给定的参考范围中时,则识别为该内燃机(1)的自主运行。
4.根据权利要求2或3的方法,其特征在于:该爆震传感器(10)的信号(109,110)在其振幅(102)方面和/或在其频率(103)方面被分析。
5.根据权利要求1至4中任一项的方法,其特征在于:发动机控制装置(11)为了起动该内燃机(1)将一个信号输出给所述起动辅助装置(3)及计算用于该内燃机(1)的、在该内燃机(1)上被调节的至少一个控制参数,其中,测量被起动的内燃机(1)的该至少一个控制参数(105)并当被测量的该控制参数(105)具有大于零的值时对所述爆震传感器(10)的信号进行分析。
6.根据权利要求5的方法,其特征在于:所述控制参数(105)涉及所述内燃机(1)的喷射和/或点火。
7.根据以上权利要求中任一项的方法,其特征在于:所述爆震传感器(10)的信号在分析前被滤波。
8.根据以上权利要求中任一项的方法,其特征在于:当所述内燃机(1)的两个控制参数(105)的值不等于零及被测量的信号(109,110)的至少一个的值在相应的所述参考范围以外时推断出所述内燃机(1)中的调节所述控制参数的致动器的故障。
9.根据权利要求8的方法,其特征在于:当识别出所述内燃机(1)非自主运行时,限制或禁止所述内燃机(1)的和/或整个***的预给定的工作状态。
10.根据以上权利要求中任一项的方法,其特征在于:借助所述内燃机(1)的自主运行来识别所述内燃机(1)的起动或停止。
11.用于识别内燃机的自主运行的装置,该装置对起动辅助装置(3)输出用于所述内燃机(1)由其静止位置起动的信号,其特征在于:设有器件(11),该器件为了识别所述内燃机(1)的自主运行对表征燃烧过程的参数、尤其压力变化或振动进行分析。
12.根据权利要求11的装置,其特征在于:在所述内燃机(1)成功起动时该器件(11)由爆震传感器(10)接收信号。
13.根据权利要求12的装置,其特征在于:所述起动辅助装置被构成起动机或混合动力机动车的电动机(3)。
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DE102010039800A DE102010039800A1 (de) | 2010-08-26 | 2010-08-26 | Verfahren und Vorrichtung zur Erkennung des selbständigen Laufens eines Verbrennungsmotors |
DE102010039800.4 | 2010-08-26 |
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US9752949B2 (en) | 2014-12-31 | 2017-09-05 | General Electric Company | System and method for locating engine noise |
MY190211A (en) * | 2015-08-20 | 2022-04-05 | Nissan Motor | Vehicle traveling control method and vehicle traveling control device |
US10760543B2 (en) | 2017-07-12 | 2020-09-01 | Innio Jenbacher Gmbh & Co Og | System and method for valve event detection and control |
FR3075884B1 (fr) * | 2017-12-21 | 2021-02-19 | Continental Automotive France | Procede de detection d'arret physique de moteur |
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2011
- 2011-08-19 US US13/213,528 patent/US9038438B2/en not_active Expired - Fee Related
- 2011-08-26 JP JP2011184524A patent/JP2012047178A/ja active Pending
- 2011-08-26 CN CN2011102539893A patent/CN102383954A/zh active Pending
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US9038438B2 (en) | 2015-05-26 |
JP2012047178A (ja) | 2012-03-08 |
US20120047997A1 (en) | 2012-03-01 |
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