CN111852609B - 操作火花点火内燃发动机或按火花点火模式操作的双燃料内燃发动机的方法和控制单元 - Google Patents
操作火花点火内燃发动机或按火花点火模式操作的双燃料内燃发动机的方法和控制单元 Download PDFInfo
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Abstract
一种用于操作火花点火内燃发动机(1)或按火花点火操作模式操作的双燃料内燃发动机(1)的方法,其中,经由油路(3)向待操作的内燃发动机(1)供应润滑油,其中,检测当前在油路(3)中使用的用于润滑的润滑油的总碱值的测量值和/或氧化的测量值,其中,取决于所确立的总碱值的测量值和/或取决于所确立的氧化的测量值,来确定油路(3)的更换油量,其中,从油路(3)中去除当前使用的润滑油达到对应于更换油量的程度,其中,将新的润滑油供应到油路(3)达到对应于更换油量的程度。
Description
技术领域
本发明涉及用于操作火花点火内燃发动机或按火花点火模式操作的双燃料内燃发动机的方法。此外,本发明涉及用于操作火花点火内燃发动机或按火花点火模式操作的双燃料内燃发动机的控制单元。
特别地,在此呈现的本发明涉及所谓的大型发动机或大型内燃发动机的范围,其气缸所具有的活塞直径大于140mm,特别是大于175mm。此类大型内燃发动机例如是船舶发动机。
背景技术
在操作期间,必须用润滑油对内燃发动机进行润滑。在该过程中,润滑油经受与操作有关的老化。润滑油的老化可能会导致润滑油失去润滑效果,并且出现内燃发动机的损坏。必须避免这种情况。
在所谓的大型发动机领域中,通常,一部分润滑油进入气缸的燃烧室,在此它与待燃烧的燃料一起燃烧。这种与操作有关的润滑油消耗得到补偿,这是因为不时地向润滑油路供应新鲜的润滑油,即,特别是当在气缸的区域中已燃烧掉太多润滑油时。
通过在气缸的区域中消耗或燃烧润滑油以及补充新的润滑油以弥补该油消耗,得以在常规的大型内燃发动机中多半保持润滑油的足够的润滑效果,使得没有必要对内燃发动机执行全面换油。全面换油将涉及重大支出。
然而,在气缸的区域中燃烧润滑油导致高的废气排放。随着排放法规越来越严格,必须避免在气缸的区域中燃烧润滑油。在这种情况下,减少在常规的大型内燃发动机中实施的对燃烧掉的润滑油的补充。因此,在其中在气缸的区域中燃烧尽可能少的润滑油以改善废气排放的内燃发动机中,有必要执行全面换油,特别是当润滑油的老化已进展过度时。这是昂贵的。
因此,在此类较新型的内燃发动机(其中在气缸的区域中仅在轻微的程度上燃烧润滑油)中,也需要能够在不全面换油的情况下完成。
发明内容
从此出发,本发明是基于以下目的:创造新型的用于操作火花点火内燃发动机或按火花点火操作模式操作的双燃料内燃发动机的方法和控制单元。
该目的通过用于操作火花点火内燃发动机或按火花点火操作模式操作的双燃料内燃发动机的方法来解决。
根据本发明,检测当前在油路中使用的用于润滑的润滑油的总碱值(total basenumber)的测量值或氧化的测量值。取决于总碱值的测量值和/或取决于氧化的测量值,来确定油路的更换油量。从油路中去除当前使用的润滑油达到确定的更换油量的程度。此外,将新的润滑油供应到油路达到对应于确定的更换油量的程度。对于在此呈现的本发明,首次提出通过测量来检测所使用的润滑油的总碱值(TBN)和/或氧化。取决于相应的检测到的测量值,来确定内燃发动机的更换油量。然后,从油路中特定地去除润滑油达到更换油量的程度,其中,将新的润滑油供应到润滑油路达到相同的程度。通过这样,于是能够使润滑油消耗再生,而对废气排放没有影响。从油路中去除的润滑油被收集在收集箱中,并且能够随后被处理掉或进一步使用。因此,即使在其中由于设计而在气缸的区域中燃烧很少的润滑油的内燃发动机中,也能够省除全面换油。
根据本发明的另外的发展,检测当前在油路中使用的用于润滑的润滑油的总碱值的测量值和氧化的测量值,其中,取决于所确定的总碱值的测量值以及取决于所确定的氧化的测量值,来确定油路的更换油量。取决于两个测量值(即,既取决于润滑油的总碱值又取决于润滑油的氧化)来确立更换油量是特别优选的,以便有利地确定火花点火内燃发动机或按火花点火模式操作的双燃料内燃发动机的更换油量。
根据本发明的另外的发展,根据特性图或根据特性曲线,取决于所确立的总碱值的测量值和/或取决于所确立的氧化的测量值,来确定油路的更换油量。能够特别容易地实现根据特性图或特性曲线来确定更换油量。能够对于总碱值的测量值和/或氧化的测量值的不同支持点来存储更换油量,其中,如果需要,能够在各个测量值之间实施内插。
限定了用于操作火花点火内燃发动机或按火花点火操作模式操作的双燃料内燃发动机的控制单元。
附图说明
从以下描述获得本发明的优选的另外的发展。本发明的示例性实施例通过附图更详细地解释而不限于此。附图中示出:
图1:内燃发动机的图。
具体实施方式
本发明涉及用于操作火花点火内燃发动机或按火花点火操作模式操作的双燃料内燃发动机的方法和控制单元。
图1示出了内燃发动机1的高度示意化图,该内燃发动机包括多个气缸2和油路3。油路3用于特别地向内燃发动机1的气缸2供应润滑油,其中,润滑油经由推进件(advance)4被供应到内燃发动机1的气缸2并且经由回流件(return)5从其中排出。
根据在此呈现的本发明,提出了检测当前在油路3中使用的用于润滑的润滑油的总碱值(TBN)的测量值和/或氧化的测量值。借助于第一传感器6来检测当前在油路3中使用的用于润滑的润滑油的总碱值的测量值。借助于第二传感器7来检测当前在油路3中使用的用于润滑的润滑油的氧化的测量值。
传感器6和7在油路中的布置是任意的。两个传感器6和7也能够被组合成一个单元。
取决于所确立的总碱值的测量值和/或取决于所确立的氧化的测量值,来确定油路3的更换油量。为此,两个传感器6、7将它们各自的测量值传输到控制单元12,该控制单元取决于总碱值的测量值和/或取决于氧化的测量值来确定油路3的更换油量。
根据本发明,从油路3中去除当前使用的润滑油达到对应于确定的更换油量的程度,此外,将新的润滑油供应到油路3达到对应于确定的更换油量的程度。控制单元12确定控制变量,根据这些控制变量来实施该油更换。
因此,图1示出了第一阀8,该第一阀能够直接或间接地由控制单元12控制(经受另外的控制单元的中间连接),以便从油路3中去除润滑油达到对应于确定的更换油量的程度并将该润滑油收集在收集箱10中。此外,图1示出了另外的阀9,该阀同样能够受到源于控制单元12的控制,以便向油路3供应在存储箱11中备妥的新的润滑油。
对于本发明,因此提出,取决于当前在油路3中使用的用于润滑的润滑油的总碱值的测量值和/或取决于氧化的测量值来从油路3中去除限定的油量,并将其更换成新的润滑油,即达到根据相应的测量值所确立的更换油量的程度。
以这种方式,能够在气缸2的区域中再现油消耗。能够连续地供应限定的更换油量的新油,以便维持润滑油的润滑油特性并使对内燃发动机1的全面换油呈现为多余。
优先地,取决于特性图或特性曲线,进行取决于所确立的总碱值的测量值和/或取决于所确立的氧化的测量值来确定油路的更换油量。特性图或特性曲线存储在控制单元12中。对于测量值的不同支持点,存储更换油量。能够在各个支持点之间执行内插或外推。
该方法被采用于火花点火内燃发动机或按火花点火操作模式操作的双燃料内燃发动机。特别地,取决于两个测量值(即,既取决于润滑油的总碱值又取决于润滑油的氧化)来确定更换油量。对于火花点火内燃发动机或按火花点火操作模式操作的双燃料发动机,该程序是特别优选的。
此外,本发明涉及用于实施该方法的控制单元12。该控制单元被配备为在控制侧上实施上文所描述的方法。为此,控制单元12包括数据接口以便与实施根据本发明的方法所涉及的组件交换数据,特别是与传感器6和7以及阀8和9交换数据。此外,作为硬件侧上的组件,控制单元12包括用于数据处理的处理器和用于数据存储的存储器。此外,控制单元12在软件侧上包括器件,所述器件是用于实施根据本发明的方法的程序模块。
控制单元12从相应的传感器6、7接收相应的测量值,这些测量值优先地为来自传感器6的总碱值的测量值以及来自传感器7的氧化的测量值。取决于相应的测量值,控制单元12确定更换油量。取决于更换油量,控制单元12发出控制信号,根据该控制信号进行油更换,因此,根据该油更换,从油路3中去除当前使用的润滑油并且将新的润滑油供应到油路3。
特别地,本发明涉及所谓的大型发动机或大型内燃发动机的领域,其气缸的所具有的活塞直径大于140mm,特别是大于175mm。此类大型内燃发动机例如是船用发动机。在本发明中,这些被体现为火花点火内燃发动机或体现为按火花点火操作模式操作的双燃料内燃发动机。作为燃料,此类内燃发动机燃烧诸如天然气之类的气态燃料或诸如甲醇之类的液态燃料。燃烧气态燃料的内燃发动机也称为燃气发动机。
附图标记列表
1 内燃发动机
2 气缸
3 油路
4 推进件
5 回流件
6 传感器
7 传感器
8 阀
9 阀
10 收集箱
11 存储箱
12 控制单元
Claims (6)
1.一种用于操作火花点火内燃发动机(1)或按火花点火操作模式操作的双燃料内燃发动机(1)的方法,
其中,经由油路(3)向待操作的所述内燃发动机(1)供应润滑油,
其中,检测当前在所述油路(3)中使用的用于润滑的所述润滑油的总碱值的测量值和氧化的测量值,
其中,取决于所确立的总碱值的测量值和取决于所确定的氧化的测量值,来确定所述油路(3)的更换油量,
其中,打开第一阀(8)并从所述油路(3)中去除当前使用的润滑油达到对应于所述更换油量的程度,
其中,打开第二阀(9)并将新的润滑油施加到所述油路(3)达到对应于所述更换油量的程度,
其中,根据特性图或特性曲线,取决于所确立的总碱值的测量值和取决于所确立的氧化的测量值,来确定所述油路(3)的更换油量。
2.根据权利要求1所述的方法,其特征在于,
检测当前在所述油路(3)中使用的用于润滑的所述润滑油的所述总碱值的测量值和所述氧化的测量值,
取决于所确立的总碱值的测量值以及取决于所确立的氧化的测量值,来确定所述油路(3)的所述更换油量。
3.根据权利要求1或2所述的方法,其特征在于,借助于第一传感器(6)来检测当前在所述油路(3)中使用的用于润滑的所述润滑油的所述总碱值的测量值。
4.根据权利要求1或2所述的方法,其特征在于,借助于第二传感器(7)来检测当前在所述油路(3)中使用的用于润滑的所述润滑油的所述氧化的测量值。
5.一种用于操作火花点火内燃发动机(1)或按火花点火操作模式操作的双燃料内燃发动机(1)的控制单元(12),
其中,所述控制单元(12)从传感器(6)接收当前用于对所述内燃发动机进行润滑的润滑油的总碱值的测量值和从传感器(7)接收所述润滑油的氧化的测量值,
其中,所述控制单元(12)取决于所述总碱值的测量值和取决于所述氧化的测量值来确定更换油量,
其中,所述控制单元(12)发出控制信号,根据所述控制信号,打开第一阀(8)并能够从油路中去除当前使用的润滑油达到对应于确定的可去除的更换油量的程度,其中,所述控制单元(12)发出控制信号,根据所述控制信号,打开第二阀(9)并能够将新的润滑油供应到所述油路达到对应于所述确定的更换油量的程度,
其中,根据特性图或特性曲线,取决于所确立的总碱值的测量值和取决于所确立的氧化的测量值,来确定所述油路(3)的更换油量。
6.根据权利要求5所述的控制单元,其特征在于,所述控制单元被配备为在控制侧上实施根据权利要求1至4中任一项所述的方法。
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US5749339A (en) * | 1996-02-28 | 1998-05-12 | Cummins Engine Company, Inc. | Electronically controlled continuous lubricating oil replacement system |
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US6408812B1 (en) * | 2000-09-19 | 2002-06-25 | The Lubrizol Corporation | Method of operating spark-ignition four-stroke internal combustion engine |
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US6920779B2 (en) * | 2002-11-15 | 2005-07-26 | International Truck Intellectual Property Company, Llc | Method of estimating engine lubricant condition |
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