CN104696082A - 控制双燃料车辆安全的方法和系统 - Google Patents

控制双燃料车辆安全的方法和系统 Download PDF

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CN104696082A
CN104696082A CN201410214706.8A CN201410214706A CN104696082A CN 104696082 A CN104696082 A CN 104696082A CN 201410214706 A CN201410214706 A CN 201410214706A CN 104696082 A CN104696082 A CN 104696082A
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pressure
vaporizer
fuel vehicle
dual
airbag
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CN104696082B (zh
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徐有珍
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Hyundai Motor Co
Kia Corp
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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
    • F02D41/0025Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0027Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
    • 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
    • F02M21/00Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D19/00Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/02Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
    • F02D19/021Control of components of the fuel supply system
    • F02D19/022Control of components of the fuel supply system to adjust the fuel pressure, temperature or composition
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D19/00Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/02Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
    • F02D19/026Measuring or estimating parameters related to the fuel supply system
    • F02D19/027Determining the fuel pressure, temperature or volume flow, the fuel tank fill level or a valve position
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D19/00Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0602Control of components of the fuel supply system
    • F02D19/0613Switch-over from one fuel to another
    • F02D19/0615Switch-over from one fuel to another being initiated by automatic means, e.g. based on engine or vehicle operating conditions
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F02D19/06Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0623Failure diagnosis or prevention; Safety measures; Testing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D19/00Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0639Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
    • F02D19/0642Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
    • F02D19/0647Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being liquefied petroleum gas [LPG], liquefied natural gas [LNG], compressed natural gas [CNG] or dimethyl ether [DME]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D19/00Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/08Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
    • F02D19/10Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels peculiar to compression-ignition engines in which the main fuel is gaseous
    • 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
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/021Introducing corrections for particular conditions exterior to the engine
    • 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
    • F02D41/22Safety or indicating devices for abnormal conditions
    • 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
    • F02M21/00Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0293Safety devices; Fail-safe measures
    • 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
    • F02M21/00Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/06Apparatus for de-liquefying, e.g. by heating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D2200/00Input parameters for engine control
    • F02D2200/60Input parameters for engine control said parameters being related to the driver demands or status
    • F02D2200/602Pedal position
    • 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/021Introducing corrections for particular conditions exterior to the engine
    • F02D41/0215Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission
    • F02D41/0225Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission in relation with the gear ratio or shift lever position
    • 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
    • Y02T10/30Use of alternative fuels, e.g. biofuels
    • 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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  • Chemical Kinetics & Catalysis (AREA)
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  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

一种控制双燃料车辆安全的方法和系统,其在车辆发生事故时可以安全地控制双燃料车辆。该方法可以包括,检测汽化器的压力,该汽化器用来将作为双燃料车辆的一种燃料的液化石油气(LPG)减压并汽化,确定检测到的汽化器的压力是等于还是高于预先确定的高压力,确定检测到的汽化器的压力是等于还是低于预先确定的低压力,确定安全气囊是否充气,以及,如果检测到的压力等于或者高于预先确定的高压力、检测到的汽化器的压力等于或者低于预先确定的低压力和/或安全气囊已充气这三个条件中至少有一个被确定为真,则转换到使用汽油的汽油模式。

Description

控制双燃料车辆安全的方法和系统
相关申请的交叉引用
本申请要求2013年12月9日提交的韩国专利申请第10-2013-0152534号的优先权,该申请的全部内容结合于本文用于通过该引用的所有目的。
技术领域
本公开涉及控制双燃料车辆(bi-fuel vehicle)安全的方法和系统,其在车辆发生事故时可以安全地控制双燃料车辆。
背景技术
正如本领域技术人员所熟知的,使用双燃料车辆是出于燃料效率、燃料的经济效率、废气等等方面的考虑。例如,双燃料车辆可以使用液化石油气(LPG)以及汽油。
双燃料车辆可以根据驾驶员的选择或者用汽油或者用LPG行驶。当双燃料车辆用汽油行驶时,这被称为汽油模式,而当双燃料车辆用LPG行驶时,这被称为LPG模式。另外,双燃料车辆可以使用LPG和柴油、汽油和压缩天然气(CNG)或者CNG和柴油。
在双燃料车辆使用LPG和汽油的情况中,罐中的液化的LPG被汽化以在发动机中燃烧,所以双燃料车辆装备有汽化器(vaporizer)。汽化器一般会减小来自罐(bombe)的液化的LPG的压力,将其汽化为气态,然后将其供给至发动机。
LPG通常通过液化石油气喷射(LPGi)方法或者液化石油喷射(LPI)方法喷射入发动机,LPGI方法以及LPI方法对于本领域一般技术人员是熟知的,所以其详细的描述将被忽略。
但是,双燃料车辆汽化器的内部压力会由于事故、恶劣的环境等等因素过度地上升或下降,从而双燃料车辆可以成为安全危害,所以需要相应的安全措施。
公开于该背景技术部分的信息仅仅旨在加深对本发明的总体背景技术的理解,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
本公开的各方面涉及提供一种控制双燃料车辆安全的方法和系统,当双燃料车辆汽化器的内部压力由于事故或恶劣的环境过度地上升或下降时,该方法和系统可以安全地控制双燃料车辆。
本公开的各个方面提供了一种控制双燃料车辆安全的方法,包括:检测汽化器的压力,该汽化器用来将作为双燃料车辆的一种燃料的液化石油气(LPG)减压并汽化;确定检测到的汽化器的压力是等于还是高于预先确定的高压力;确定检测到的汽化器的压力是等于还是低于预先确定的低压力;确定安全气囊(airbag)是否充气;以及,如果检测到的压力等于或者高于预先确定的高压力、检测到的汽化器的压力等于或者低于预先确定的低压力或者安全气囊已充气这三个条件中至少一个被确定为真,则转换到汽油模式,该模式使用汽油。
该方法还包括在双燃料车辆转换到汽油模式时关闭用来供给LPG的关断阀门(shut-off valve)。
基于通过控制器局域网(CAN)通信的信号可以确定安全气囊是否充气。
所述方法可以进一步包括:在安全气囊充气后检测是否出现油门踏板(accelerator pedal)的使用;出现油门踏板的使用时转换到汽油模式;以及,没有出现油门踏板的使用时停止发动机。
所述方法可以进一步包括:将预先确定的高压力分为第一个高压力以及第二个高压力;当检测到的汽化器的压力等于或者高于第一个高压力时立即转换到汽油模式;当检测到的汽化器的压力等于或者高于第二个高压力并且出现油门踏板的使用时转换到汽油模式;当检测到的汽化器的压力等于或者高于第二个高压力并且没有出现油门踏板的使用时停止发动机。
LPG可以通过液化石油气喷射(LPGi)方法或者液化石油喷射(LPI)方法喷射到发动机。
本公开的各个方面提供了一种控制双燃料车辆安全的系统,包括:汽化器,其用来将LPG汽化到气态;压力传感器,其检测汽化器的压力;安全气囊模块,其在预先确定的冲击力施加到双燃料车辆时使安全气囊充气,并且在安全气囊已充气时产生并传递安全气囊充气信号;油门位置传感器(acceleration position sensor,APS),其检测油门踏板的位置;以及控制器,其选择燃料模式并且依据压力传感器的信号、安全气囊充气信号和APS的信号控制发动机的运行。控制器由程序控制,该程序包括一系列指令,该指令执行控制双燃料车辆安全的方法,该方法包括:检测汽化器的压力,该汽化器用以将作为双燃料车辆的一种燃料的液化石油气(LPG)减压并汽化;确定检测到的汽化器的压力是等于还是高于预先确定的高压力;确定检测到的汽化器的压力是等于还是低于预先确定的低压力;确定安全气囊是否充气;以及,如果检测到的压力等于或者高于预先确定的高压力、检测到的汽化器的压力等于或者低于预先确定的低压力或者安全气囊已充气这三个条件中至少有一个被确定为真,则转换到使用汽油的汽油模式。
安全气囊充气信号可以通过CAN通信传递到控制器。
根据本公开的实施方式,当使用LPG和汽油的双燃料车辆汽化器的内部压力由于事故、恶劣的环境或使用期限等因素而过度地上升或下降时,安全地控制双燃料车辆是可能的。
通过纳入本文的附图以及随后与附图一起用于说明本发明的某些原理的具体实施方式,本发明的方法和装置所具有的其它特征和优点将更为具体地变得清楚或得以阐明。
附图说明
图1为根据本公开的控制双燃料车辆安全的示意性的系统的结构的示意图。
图2为根据本公开的控制双燃料车辆安全的示意性的方法的流程图。
图3至图6为解释本公开的示意性系统和方法的图示。
具体实施方式
下面将详细说明本发明的不同实施方案,在附图中和以下的描述中示出了这些实施方案的实例。虽然本发明将与示例性实施方案相组合进行描述,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,而且覆盖可以被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、修改、等效形式以及其它实施方案。
除非明确地说明意思相反,否则词语“包括”以及例如“包括”的第三人称形式或者“包括”的现在分词形式将被理解为意指包括声明的元件,但不排除任何其他的元件。
图1为根据本公开的各种实施方式的双燃料车辆安全控制系统的结构的示意图。如图1所示,根据本公开的各种实施方式的系统依据双燃料车辆里安装的汽化器的压力的变化安全地控制使用LPG和汽油的双燃料车辆。
该系统包括:汽化器20,其用来将LPG汽化到气态;压力传感器22,其检测汽化器20的压力;安全气囊模块40,其在预先确定的冲击力施加到双燃料车辆时使安全气囊充气,并且在安全气囊已充气时产生并传递安全气囊充气信号;APS70,其检测油门踏板60的位置;关断阀门25,其关断正供给到发动机10的LPG;以及控制器100,其选择燃料模式并且依据压力传感器22的信号、安全气囊充气信号和APS70的信号控制发动机10的运行。
图1中,附图标记10指发动机,30指LPG罐,而50指汽油燃料箱。
本公开的各实施方式中的汽化器20、压力传感器22、安全气囊模块40、APS70以及关断阀门25对应于双燃料车辆中常用的那些部件。
控制器100可以包括一个或多个处理器或微处理器以及由程序控制的硬件,该程序包括一系列指令,该指令执行的是根据本公开的各种实施方式的控制双燃料车辆安全的方法,这些方法将在下文叙述。控制器100可以包括发动机控制单元(ECU)。某些实施方式中,控制器100可以被包括于ECU。
LPG可以通过LPGI方法或LPI方法喷射到发动机10。应用LPGI方法或LPI方法的车辆装备有LPG的喷射器以及LPG的燃料泵,其相似于或者相同于现有技术中的装置,所以其具体描述将被省略。
下文中,将参考所附附图详细描述根据本公开各种实施方式的控制双燃料车辆安全的方法。
图2为根据本公开的各种实施方式的控制双燃料车辆安全的方法的流程图。如图2所示,在步骤S100中控制器100通过压力传感器22检测汽化器20的压力,汽化器20使LPG减压并使其汽化,而LPG是双燃料车辆所使用的燃料中的一种。
控制器100可以通过压力传感器22以与现有技术相同的方法检测汽化器20的压力。控制器100不仅检测汽化器20的压力,还在步骤S200确定是否接收到了由安全气囊充气引发的信号。
安全气囊充气信号可以如图3所示配置。如图4所示,控制器100可以接收CAN信号形式的安全气囊充气信号。当控制器100接收如图4所示的CAN信号时,控制器100可以记录接收到的CAN信号的数量,如图5所示。图3到图5所示的信号处理可以对应于现有技术中的信号处理。
当控制器100接收到安全气囊充气信号时,控制器100在步骤S300将燃料模式转换到汽油模式,以预防LPG泄露的危险。当控制器100在步骤S300将燃料模式转换到汽油模式时,控制器100可以将关断阀门25关闭。
当控制器100在步骤S200接收到安全气囊充气信号时,可选择地,控制器100在步骤S210可以通过APS70确定油门踏板60是否正被使用。步骤S210中,当油门踏板60被使用时,控制器100确定驾驶员希望移动双燃料车辆以避免险情,所以控制器执行步骤S300。不然,控制器100确定驾驶员没有移动双燃料车辆的意愿,所以控制器100在步骤S400停止发动机的运行。当控制器100停止发动机10时,控制器100还将关断阀门25关闭。
在步骤S100,当检测汽化器20的压力时,控制器100在步骤S120中确定检测到的汽化器20的压力是等于还是高于预先确定的高压力。当检测到的汽化器20的压力低于预先确定的高压力时,控制器100在步骤S130中确定检测到的汽化器20的压力是等于还是低于预先确定的低压力。当检测到的汽化器20的压力等于或者低于预先确定的低压力时,这就是有可能将LPG供给到发动机10的情况,控制器100在步骤S300将燃料模式转换到汽油模式并且关闭LPG的关断阀门25。关于转换到汽油模式和/或关闭关断阀门,控制器100可以通过如图6所示的信号执行该过程。
在步骤S120,当检测到的汽化器20的压力等于或者高于预先确定的高压力时,这就是过度高压力状态,控制器100在步骤S300将燃料模式转换到汽油模式并且关闭关断阀门25。
同时,在步骤S120,当检测到的汽化器20的压力等于或者高于预先确定的高压力时,可选择地,控制器100在步骤S122可以确定检测到的压力是等于还是高于第二个高压力。该第二个高压力可以高于该预先确定的高压力。
在步骤S122,当检测到的压力等于或者高于第二个高压力时,这是发动机机舱(engine compartment)中泄露的LPG可以导致燃烧的险情,控制器100在步骤S124确定加油踏板是否被使用。
步骤S124中,当油门踏板被使用时,控制器100确定驾驶员希望移动双燃料车辆以避免险情,所以控制器执行步骤S300。否则,控制器100确定驾驶员没有移动双燃料车辆的意愿,所以控制器100在步骤S400停止发动机的运行。
相应地,根据本发明的示意性实施方式,当使用LPG和汽油的双燃料车辆的汽化器的内部压力由于事故、恶劣环境或使用期限而过度地上升或下降时,安全地控制双燃料车辆是可能的。
前面对本发明的具体示意性实施方式所呈现的描述是出于说明和描述的目的。前面的描述并不意在成为毫无遗漏的,也不意在把本发明限制为所公开的精确形式,显然,根据上述言论很多修改和变化都是可能的。选择示意性实施方式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意性实施方式及其各种替代形式和修改形式。本发明的范围意在由所附权利要求及其等价形式限定。

Claims (9)

1.一种控制双燃料车辆安全的方法,所述方法包括:
检测汽化器的压力,所述汽化器用来将作为双燃料车辆的一种燃料的液化石油气减压并汽化;
确定所述检测到的汽化器的压力是等于还是高于预先确定的高压力;
确定所述检测到的汽化器的压力是等于还是低于预先确定的低压力;
确定安全气囊是否已充气;以及
如果所述检测到的压力等于或者高于所述预先确定的高压力、所述检测到的汽化器的压力等于或者低于所述预先确定的低压力或者所述安全气囊已充气这三个条件中至少有一个被确定为真,则转换到汽油模式,所述汽油模式使用汽油。
2.根据权利要求1所述的控制双燃料车辆安全的方法,所述方法还包括:
在双燃料车辆转换到所述汽油模式时关闭用来供给液化石油气的关断阀门。
3.根据权利要求1所述的控制双燃料车辆安全的方法,其中,确定所述安全气囊是否已充气基于通过控制器局域网通信的信号进行。
4.根据权利要求2所述的控制双燃料车辆安全的方法,所述方法还包括:
在所述安全气囊充气后检测是否出现油门踏板的使用;
出现所述油门踏板的使用时转换到所述汽油模式;以及
没有出现所述油门踏板的使用时停止发动机。
5.根据权利要求4所述的控制双燃料车辆安全的方法,所述方法还包括:
将所述预先确定的高压力分为第一个高压力以及第二个高压力;
当所述检测到的汽化器的压力等于或者高于所述第一个高压力时立即转换到所述汽油模式;
当所述检测到的汽化器的压力等于或者高于所述第二个高压力并且出现所述油门踏板的使用时转换到所述汽油模式;
当所述检测到的汽化器的压力等于或者高于所述第二个高压力并且没有出现所述油门踏板的使用时停止所述发动机。
6.根据权利要求1所述的控制双燃料车辆安全的方法,其中,液化石油气可以通过液化石油气喷射方法或者液化石油喷射方法喷射到发动机。
7.一种控制双燃料车辆安全的系统,所述系统包括:
汽化器,所述汽化器用来将液化石油气汽化到气态;
压力传感器,所述压力传感器检测所述汽化器的压力;
安全气囊模块,所述安全气囊模块在预先确定的冲击力施加到双燃料车辆时使安全气囊充气,并且在所述安全气囊已充气时产生并传递安全气囊充气信号;
油门位置传感器,所述油门位置传感器检测油门踏板的位置;以及
控制器,所述控制器选择燃料模式并且依据所述压力传感器的信号、所述安全气囊充气信号以及所述油门位置传感器的信号控制发动机的运行;
其中所述控制器由程序控制,所述程序包括一系列指令,所述指令执行控制双燃料车辆安全的方法,所述方法包括:
检测所述汽化器的压力,所述汽化器用来将作为双燃料车辆的一种燃料的液化石油气减压并汽化;
确定所述检测到的汽化器的压力是等于还是高于预先确定的高压力;
确定所述检测到的汽化器的压力是等于还是低于预先确定的低压力;
确定所述安全气囊是否充气;以及
如果所述检测到的压力等于或者高于所述预先确定的高压力、所述检测到的汽化器的压力等于或者低于所述预先确定的低压力或者所述安全气囊已充气这三个条件中至少有一个被确定为真,则转换到汽油模式,所述汽油模式使用汽油。
8.根据权利要求7所述的控制双燃料车辆安全的系统,其中所述安全气囊充气信号通过控制器局域网通信传递到控制器。
9.根据权利要求7所述的控制双燃料车辆安全的方法,其中,液化石油气通过液化石油气喷射方法或者液化石油喷射方法喷射到所述发动机。
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