CN107524530A - 用于控制空气控制阀的方法 - Google Patents

用于控制空气控制阀的方法 Download PDF

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CN107524530A
CN107524530A CN201611139813.4A CN201611139813A CN107524530A CN 107524530 A CN107524530 A CN 107524530A CN 201611139813 A CN201611139813 A CN 201611139813A CN 107524530 A CN107524530 A CN 107524530A
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pressure
valve
inlet manifold
air shut
acv
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金钟求
李星学
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Hyundai Motor Co
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/0002Controlling intake air
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047Controlling exhaust gas recirculation [EGR]
    • F02D41/005Controlling exhaust gas recirculation [EGR] according to engine operating conditions
    • F02D41/0055Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00Control of flow
    • G05D7/06Control of flow characterised by the use of electric means
    • G05D7/0617Control of flow characterised by the use of electric means specially adapted for fluid materials
    • G05D7/0629Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
    • G05D7/0635Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00Electrical control of exhaust gas treating apparatus
    • F01N9/002Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047Controlling exhaust gas recirculation [EGR]
    • F02D41/005Controlling exhaust gas recirculation [EGR] according to engine operating conditions
    • F02D41/0052Feedback control of engine parameters, e.g. for control of air/fuel ratio or intake air amount
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D9/00Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10242Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10255Arrangements of valves; Multi-way valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10373Sensors for intake systems
    • F02M35/1038Sensors for intake systems for temperature or pressure
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00Control of fluid pressure
    • G05D16/20Control of fluid pressure characterised by the use of electric means
    • G05D16/2006Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2013Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2430/00Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
    • F01N2430/06Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by varying fuel-air ratio, e.g. by enriching fuel-air mixture
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06Parameters used for exhaust control or diagnosing
    • F01N2900/16Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
    • F01N2900/1602Temperature of exhaust gas apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D9/00Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F02D2009/0201Arrangements; Control features; Details thereof
    • F02D2009/0228Manifold pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D2200/00Input parameters for engine control
    • F02D2200/02Input parameters for engine control the parameters being related to the engine
    • F02D2200/04Engine intake system parameters
    • F02D2200/0406Intake manifold pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D2200/00Input parameters for engine control
    • F02D2200/02Input parameters for engine control the parameters being related to the engine
    • F02D2200/08Exhaust gas treatment apparatus parameters
    • F02D2200/0802Temperature of the exhaust gas treatment apparatus
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/40Engine management systems

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  • Processes For Solid Components From Exhaust (AREA)

Abstract

本发明提供一种用于控制空气控制阀的方法,以提高排放气体的温度升高速率并防止过量的机油损耗,该方法可以包括:关闭步骤,其在排放气体后处理设备需要再生时利用控制器来关闭空气控制阀;以及调节步骤,其根据进气歧管中的压力为正压或负压而利用控制器来打开或关闭空气控制阀。

Description

用于控制空气控制阀的方法
技术领域
本发明涉及用于控制空气控制阀(Air Control valve,ACV)以提高排放气体的温度升高速率并且避免过量机油损耗的方法。
背景技术
排放气体的温度应该达到预定水平以用于DPF再生,并且因此,需要减少新流入的空气的量以便快速地提高排放气体的温度。
当通过关闭ACV以最小化流入的新的空气的量来增大燃料-空气比时,排放气体的温度可以由于已燃烧的燃料的量的增多而迅速升高。
这种ACV(空气控制阀)在车辆受到正常驱动时打开,因而使进气歧管和燃烧室中的压力维持为正压状态。
然而,当ACV关闭以再生DPF时,在进气歧管和燃烧室中产生负压。
也即,压力以与在燃烧室中活塞环刮除机油所沿的方向相反的方向产生,因而暴露且留存在燃烧室中的机油的量增加,并且因此机油损耗增加。
公开于该本发明背景技术部分的信息仅仅旨在加深对本发明的一般背景技术的理解,而不应当被视为承认或以任何形式暗示该信息构成已为本领域技术人员所公知的现有技术。
发明内容
本发明的各个方面致力于提供一种控制ACV以提高排放气体的温度升高速率并防止过量机油损耗的方法。
本发明的各个方面致力于提供一种控制ACV(空气控制阀)的方法,所述方法包括:关闭步骤,其在排放气体后处理设备需要再生时利用控制器关闭ACV;以及调节步骤,其根据进气歧管中的压力为正压或负压而利用控制器来打开或关闭ACV。
调节步骤可以包括关闭调节步骤,所述关闭调节步骤在进气歧管中的压力为正压时将ACV关闭预定的量。
调节步骤可以包括:负压确定步骤,其在进气歧管中的压力为负压时将进气歧管中的压力和参考压力进行比较;以及作为负压确定步骤的结果,当进气歧管中的压力为参考压力或更小时,将ACV打开预定的量。
所述方法可以进一步包括关闭调节步骤,作为负压确定步骤的结果,所述关闭调节步骤在发现进气歧管中的压力高于参考压力时,将ACV关闭预定的量。
所述方法可以进一步包括完全打开步骤:在调节步骤之后,当排放气体后处理设备的前端处的温度高于参考温度时,完全打开ACV。
可以通过空气流量传感器(Air Mass Flow,AMF)来检测进气歧管中的压力。
根据本发明,ACV根据进气歧管的压力状态而关闭或打开,由此提高用于DPF再生的排放气体的温度升高速率,并且减少在燃烧室中留存的机油的量。因此,避免过量机油损耗。
本发明的方法和装置具有其它的特性和优点,这些特性和优点从并入本文中的附图和随后的具体实施方案中将是显而易见的,或者将在并入本文中的附图和随后的具体实施方案中进行详细陈述,这些附图和具体实施方案共同用于解释本发明的特定原理。
附图说明
图1是示出根据本发明的示例性实施方案的控制ACV的过程的流程图;以及
图2为显示根据本发明的示例性实施方案的用于控制ACV的系统的配置的图。
应当了解,所附附图并不必须是按比例绘制的,其呈现了某种程度上经过简化的说明本发明的基本原理的各个特征。本文所公开的本发明的具体设计特征包括例如具体尺寸、方向、位置和外形将部分地由具体所要应用和使用的环境来确定。在这些图中,贯穿附图的多幅图,相同的附图标记指代本发明的相同或等同的部分。
具体实施方式
下面将详细说明本发明的各个实施方案,其示例将在附图中示出并且在下文进行描述。虽然本发明与示例性实施方案相结合进行描述,但是应当了解,本说明书并非旨在将本发明限制为那些示例性实施方案。相反,本发明旨在不但覆盖这些示例性实施方案,而且覆盖可以包括在由所附权利要求所限定的本发明的精神和范围之内的各种替换形式、修改形式、等效形式以及其它实施方案。下面将参考附图对本发明的示例性实施方案进行详细描述。
本发明的控制ACV的方法可以包括关闭步骤和调节步骤。
参考图1和图2,具体而言,在关闭步骤中,当排放气体后处理设备需要再生时,可以通过控制器7而将ACV(空气控制阀)控制为部分地关闭。
例如,排放气体后处理设备可以是柴油机微粒过滤器(DPF),而当DPF需要再生时,ACV 1(其是打开的)被控制为根据预定打开程度Ci而部分关闭。此外,可以执行后喷射控制。
ACV阀的预定打开程度Ci可以是40-60%。
此外,在调节步骤,可以根据进气歧管3中的压力是正压或负压而通过控制器7将ACV 1控制为打开或关闭。
也即,ACV 1设置在中冷器和进气歧管3之间来调节新的空气的流入量,并且不仅燃料空气比取决于ACV 1的打开程度,而且进气歧管3中的压力也取决于ACV 1的打开程度。
因此,当进气歧管3中的压力为正压时,少量的机油留存并暴露在燃烧室中,所以通过执行控制以关闭ACV 1,排放气体的温度升高速率增加。
此外,当进气歧管3中的压力为负压时,相对大量的机油留存并暴露在燃烧室中,并且因此通过执行控制来打开ACV 1而避免机油损耗的增加。
具体而言,当进气歧管3中的压力为正压时,能够将ACV阀1关闭预定的量。
例如,在根据对DPF再生的需求而将ACV 1的打开程度设定为50%之后,当确定进气歧管3中的压力为正压时,控制ACV 1以将其关闭预定的量(5%-10%)。因此,能够在不增加机油损耗的情况下迅速地提高排放气体的温度上升速率。
可以通过能够测量和估算压力的传感器(优选为设置在进气管线中的空气流量(Air Mass Flow,AMF)传感器5)来检测进气歧管3中的压力。
也即,能够通过AMF传感器5基于流速(流量)来获得有关温度变化的校准数据,并且根据该数据来估算和检测进气歧管3中的压力。
此外,当进气歧管3中的压力为负压时,将进气歧管3中的压力与参考压力进行比较,然后,当作为比较的结果发现进气歧管中的压力为参考压力或更小时,可以将ACV阀1打开预定的量。
参考压力可以是可能会影响机油损耗的量的负压,并且可以根据发动机而不同地设置。
例如,在根据对DPF再生的需求而将ACV 1的打开程度控制为50%之后,当确定进气歧管3中的压力为负压时,再次将当前压力与参考压力进行比较。作为比较的结果,在当前压力低于参考压力时,将ACV 1打开预定的量(0.5-10%)。因此,能够避免机油损耗的增加。
然而,当作为比较进气歧管3中的压力与参考压力的结果发现进气歧管3中的压力高于参考压力时,可以将ACV 1关闭预定的量。
也即,即使进气歧管3中的压力为负压,当其不在影响机油损耗的水平时,将ACV 1关闭预定的量(0.5-10%)。因此,能够在不增加机油损耗的情况下迅速地提高排放气体的温度升高速率。
此外,本发明还进一步包括完全打开步骤:在调节步骤之后,当排放气体后处理设备的前端处的温度高于参考温度时,完全打开ACV 1。
该参考温度可以为适合于DPF再生的最小温度,并且可以通过在DPF前端处的温度传感器9来测量。
也即,当DPF前端处的温度高于参考温度时,完全打开ACV 1。然而,当DPF前端处的温度等于或低于参考温度时,再次根据进气歧管3中的压力来控制ACV 1的打开程度。
下文描述了根据本发明的示例性实施方案的ACV 1的控制的流程。
参考图1,当存在对DPF再生的需要时,执行后喷射控制,并且将已打开的ACV 1关闭50%(S10)。
之后,确定进气歧管3中的压力为正压或负压(S20),并且随后,当作为确定的结果发现压力是正压时,将ACV 1关闭1%。
另一方面。当作为确定的结果发现其为负压时,将当前压力与参考压力进行比较(S40)。
作为比较的结果,当发现当前压力为参考压力或更小时,将ACV阀1打开1%(S50)。另一方面,当发现当前压力高于参考压力时,将ACV阀1关闭1%(S30)。
之后,确定DPF前端处的温度是否高于参考温度(S60),并且当作为确定的结果发现温度已升高为高于参考温度时,完全打开ACV阀1(S70)。
另一方面,当作为确定的结果发现温度为参考温度或更低时,过程返回至步骤S20,并且再次控制ACV 1。
如上所述,根据本发明的示例性实施方案,ACV 1根据进气歧管3的压力状态而关闭或打开,由此提高用于DPF再生的排放气体的温度升高速率,并且减少了在燃烧室中留存的机油的量。因此,避免过量机油损耗。
为了便于解释以及在所附权利要求中进行精确限定,术语“上部”、“下部”、“内部”、“外部”、“上”、“下”、“向上”、“向下”、“前面”、“后部”、“后面”、“内部”、“外部”、“向内地”、“向外地”、“内部的”、“外部的”、“向前”以及“向后”被用于参考附图中所显示的特征的位置来描述示例性实施方案的这些特征。
前面对本发明具体示例性实施方案所呈现的描述是出于说明和描述的目的。前面的描述并不想要成为毫无遗漏的,也不是想要把本发明限制为所公开的精确形式,显然,根据上述教导很多改变和变化都是可能的。选择示例性实施方案并进行描述是为了解释本发明的特定原理及其实际应用,从而使得本领域的其它技术人员能够实现并利用本发明的各种示例性实施方案及其各种选择形式和修改形式。本发明的范围意在由所附权利要求书及其等效形式所限定。

Claims (6)

1.一种控制空气控制阀的方法,所述方法包括:
关闭步骤,其在排放气体后处理设备需要再生时利用控制器来关闭空气控制阀;
调节步骤,其根据进气歧管中的压力为正压或负压而利用控制器来打开或关闭空气控制阀。
2.根据权利要求1所述的控制空气控制阀的方法,其中,调节步骤包括关闭调节步骤,所述关闭调节步骤在进气歧管中的压力为正压时将空气控制阀关闭预定的量。
3.根据权利要求1所述的控制空气控制阀的方法,其中,所述调节步骤包括:
负压确定步骤,其在进气歧管中的压力为负压时将进气歧管中的压力与预定压力进行比较;以及
作为负压确定步骤的结果,当发现进气歧管中的压力为预定压力或更小时,将空气控制阀打开预定的量。
4.根据权利要求3所述的控制空气控制阀的方法,进一步包括关闭调节步骤,作为负压确定步骤的结果,所述关闭调节步骤在发现进气歧管中的压力高于预定压力时,将空气控制阀关闭预定的量。
5.根据权利要求1所述的控制空气控制阀的方法,进一步包括完全打开步骤:在调节步骤之后,当排放气体后处理设备的前端处的温度高于参考温度时,完全打开空气控制阀。
6.根据权利要求1所述的控制空气控制阀的方法,其中通过空气流量传感器来检测进气歧管中的压力。
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