CN107618361A - 双燃料车辆的lpg储罐冷却系统 - Google Patents
双燃料车辆的lpg储罐冷却系统 Download PDFInfo
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- CN107618361A CN107618361A CN201611237623.6A CN201611237623A CN107618361A CN 107618361 A CN107618361 A CN 107618361A CN 201611237623 A CN201611237623 A CN 201611237623A CN 107618361 A CN107618361 A CN 107618361A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0221—Fuel storage reservoirs, e.g. cryogenic tanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/03006—Gas tanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
- B60K15/03519—Valve arrangements in the vent line
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- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling 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
- F02D19/0639—Controlling 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
- F02D19/0642—Controlling 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
- F02D19/0647—Controlling 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]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling 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
- F02D19/08—Controlling 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
- F02D19/081—Adjusting the fuel composition or mixing ratio; Transitioning from one fuel to the other
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- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0209—Hydrocarbon fuels, e.g. methane or acetylene
- F02M21/0212—Hydrocarbon fuels, e.g. methane or acetylene comprising at least 3 C-Atoms, e.g. liquefied petroleum gas [LPG], propane or butane
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
- F02M21/0242—Shut-off valves; Check valves; Safety valves; Pressure relief valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
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- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
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- F17C13/00—Details of vessels or of the filling or discharging of vessels
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- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/002—Details of vessels or of the filling or discharging of vessels for vessels under pressure
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- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
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- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03256—Fuel tanks characterised by special valves, the mounting thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03328—Arrangements or special measures related to fuel tanks or fuel handling
- B60K2015/03447—Arrangements or special measures related to fuel tanks or fuel handling for improving the sealing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
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- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
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Abstract
本发明提供一种使用汽油和LPG的双燃料车辆的LPG储罐冷却系统。LPG储罐冷却系统被配置为利用汽油箱中的汽油的温度低于LPG储罐中的LPG的温度的事实,通过将来自汽油箱的一些汽油供给到LPG储罐中来冷却LPG储罐的内部并降低LPG的蒸气压,因此即使在外部温度非常高例如在炎热季节中的情况下,也可以容易地为LPG储罐再加LPG。
Description
技术领域
本公开涉及一种双燃料车辆的LPG储罐(bombe)冷却系统。
背景技术
使用汽油和LPG的双燃料车辆配备有分开设置的汽油供给系统和LPG供给系统。
如图1所示,为双燃料车辆的LPG储罐加LPG的过程包括以下步骤:操作LPG加气站的加气泵2;作为操作加气泵2的结果,从LPG加气站的LPG存储空间1向加气枪3供给LPG;以及利用加气枪3的LPG加气压力来为车辆的LPG储罐加LPG。
本部分公开的内容旨在提供本发明的背景。申请人注意到,本部分可能包含本申请之前的可用信息。但是,通过提供本部分,申请人不承认包含在本部分中的任何信息构成现有技术。
发明内容
本发明的一个方面提供一种使用汽油和LPG的双燃料车辆的LPG储罐冷却系统,该系统能够利用汽油箱中的汽油的温度低于LPG储罐中的LPG的温度的事实,通过从汽油箱向LPG储罐中供给一些汽油来冷却LPG储罐的内部并降低LPG的蒸气压,因此即使在外部温度非常高例如在炎热季节中的情况下,也可以容易地为LPG储罐再加LPG。
本发明的另一方面提供一种双燃料车辆的LPG储罐冷却系统,该系统包括:辅助室,其安装在双燃料车辆的LPG储罐中;第一燃料分支线路,其从汽油供给线路分叉,该第一燃料分支线路连接在汽油箱和发动机之间并与辅助室连接;第二燃料分支线路,其从LPG供给线路分叉,该第二燃料分支线路连接在安装于LPG储罐中的LPI泵和发动机之间并与辅助室连接;第一电磁阀,其安装在第一燃料分支线路中;第二电磁阀,其安装在第二燃料分支线路中;以及控制器,用于执行控制,使得第一电磁阀和第二电磁阀基于LPG储罐中的压力打开或关闭。
在一个实施例中,辅助室可以包括位于形成在LPG储罐中的安装孔上的凸缘部分、从凸缘部分延伸到LPG储罐中的热交换室以及附接到凸缘部分所位于的LPG储罐中的安装孔的密封盖。
在另一个实施例中,热交换室可以在其远端部分处设置有用于允许LPG从热交换室流入LPG储罐的止回阀。
在又一个实施例中,辅助室可以由具有高传热速率的铝材料制成。
在另一个实施例中,辅助室可以在其入口处设置有用于将汽油喷射到热交换室中的喷嘴。
在另一个实施例中,第一燃料分支线路可以在其第一电磁阀和辅助室之间的一点处设置有用于测量供给到辅助室的汽油量的流量计。
在进一步的实施例中,LPG储罐可以在其中具有分隔壁,该分隔壁用于将LPG储罐的内部分隔成其中设置有辅助室的空间和其中设置有LPI泵的空间,并且用于防止汽油被直接供给到LPI泵。
在另一个进一步的实施例中,控制器可以基于来自安装在LPG储罐中的LPG计量器的LPG剩余量的测量信号来控制第一电磁阀打开的时间量,以便确定供给到辅助室的汽油量。
在另一个进一步的实施例中,当在第一电磁阀关闭的状态下操作LPI泵时,控制器可以执行控制使得第二电磁阀打开预定的时间段,因此,从LPG储罐向发动机供给的一部分LPG将被供给到辅助室,并且此时,控制器可以执行控制使得LPI泵在最大运行水平下被操作预定的时间段。
在又一个进一步的实施例中,可以使用安装在LPG供给线路和LPG返回线路中的调节器中的压力传感器来测量LPG储罐中的压力。
本发明的进一步方面提供一种双燃料车辆,其包括:双燃料发动机,其被配置为基于包括汽油和LPG(液化丙烷气体或液化石油气)的两种或更多种燃料运行;汽油箱,其容纳有汽油并通过汽油供给线路与发动机连接;LPG箱,其容纳有LPG并且通过LPG供给线路与发动机连接;热交换器,其设置在LPG箱中,热交换器包括容器,该容器通过从汽油供给线路分支的汽油分支线路与汽油箱连接并且通过从LPG供给线路分支的LPG分支线路与LPG箱进一步连接,热交换器包括止回阀;汽油阀,其设置在汽油分支线路上并被配置为控制汽油朝向热交换器的容器的流动;LPG阀,其设置在LPG分支线路上并被配置为控制LPG朝向热交换器的容器的流动;以及控制器,其包括一个或多个处理器并被配置为基于LPG箱的压力来控制汽油阀和LPG阀,使得一部分汽油被传输到容器,同时将汽油供给到发动机用以燃烧,随后,汽油或LPG在一段时间内都不被传输到容器,以使容器中的汽油与容纳在LPG箱中的LPG进行热交换;并且随后,当LPG被供给到发动机用以燃烧时,一部分LPG被传输到容器中,在该容器中,一部分LPG与容纳在容器中的汽油混合,从而增加容器中的压力并使得汽油和LPG的混合物通过止回阀释放到LPG箱。本发明的其它方面和实施例将在下文讨论。
应当理解,本文所使用的术语“车辆”或“车辆的”或其他类似术语包括例如包含运动型多用途车辆(SUV)、公共汽车、卡车、各种商务车辆的乘用汽车、包含各种船艇和轮船的船舶以及飞行器等一般的机动车辆,并且包括混合动力车辆、电动车辆、插电式混合动力电动车辆、氢动力车辆以及其它替代燃料(例如,源自除石油以外的资源的燃料)车辆。如在此所涉及的,混合动力车辆是具有两个或更多个动力源的车辆,例如汽油动力和电动力车辆。
本发明的上述特征和其它特征将在下文讨论。
附图说明
现在将参照在附图中示出的本发明的某些实施例来详细描述本发明的上述特征和其它特征,这些附图仅作为示例在下文给出并因此不限制本发明,其中:
图1是示出为双燃料车辆加LPG的过程的示意图;
图2是示出汽油箱和LPG储罐被设置在双燃料车辆中的状态的示意图;
图3是示出根据本发明的实施例的双燃料车辆的LPG储罐冷却系统的构造的视图;
图4是示出根据本发明的实施例的LPG储罐冷却系统的辅助室的透视图;
图5是示出根据本发明的实施例的LPG储罐冷却系统的辅助室安装在LPG储罐中的状态的透视图;
图6是示出根据本发明的实施例的LPG储罐冷却系统的构造的视图,其中喷嘴安装到辅助室的入口;
图7是示出根据本发明的实施例的LPG储罐冷却系统的构造的视图,其中流量计安装到辅助室的入口并且分隔壁安装在LPG储罐中;
图8是示出根据本发明的实施例的LPG储罐冷却系统的操作的流程图;以及
图9至图11是示出根据本发明的实施例的LPG储罐冷却系统的操作的视图。
应当理解到,附图不一定按比例绘制,其呈现了说明本发明的基本原理的各种特征的某种程度的简化表示。本文中公开的包括例如特定尺寸、方向、位置和形状的本发明的特定设计特征将部分地由特定的预期应用和使用环境来确定。
在附图中,贯穿多个附图的相同的附图标记表示本发明的相同或等同的部件。
具体实施方式
在下文中将详细参照本发明的各种实施例,这些实施例的示例在附图中示出并在下文中描述。尽管将结合实施例描述本发明,但是应理解,本描述不旨在将本发明限于那些实施例。相反,本发明旨在不仅覆盖实施例,而且覆盖可以包括在由所附权利要求限定的本发明的精神和范围内的各种替代、修改、等同物和其他实施例。
使用汽油和LPG的双燃料车辆配备有分开设置的汽油供给系统和LPG供给系统。
在双燃料车辆的燃料供给系统中,在外部温度非常高例如在炎热季节中的情况下,车辆的LPG储罐中的压力可能高于LPG加气压力,导致不可能加LPG。
在车辆的LPG储罐中的压力高于LPG加气压力的情况下,安装在LPG储罐的LPG注射口中的溢流阀的止回阀打不开,导致不可能通过加气枪为LPG储罐加LPG。
例如,当炎热季节中的大气温度为大约40℃或更高时,车辆的LPG储罐中的压力变得比加气枪中的LPG加气压力(例如16.3巴=8.3巴(LPG加气站的LPG存储空间中的压力)+8.0巴(操作加气泵而产生的LPG泵送压力))更高(例如16.5巴)。因此,安装在LPG储罐的LPG注射口中的溢流阀的止回阀打不开,导致不可能通过加气枪为LPG储罐加LPG。
参照图2,在实施例中,汽油箱10和LPG储罐或LPG箱20被安装到双燃料车辆的底盘以使得彼此平行。在双燃料车辆的布局中,LPG储罐20和废气排放管线12之间的距离比汽油箱10和废气排放管线12之间的距离更短。因此,汽油箱10比LPG储罐20受热源的影响小。
因此,汽油箱10中的汽油的温度保持低于LPG储罐20(其也可以称为LPG容器或LPG箱)中的LPG的温度。
此外,从汽油箱供给到发动机的汽油燃烧但不返回到汽油箱,然而,从LPG储罐供给到发动机的LPG的未燃烧的部分返回到LPG储罐。
由于LPG在LPG的温度通过发动机中的燃烧的热而升高的状态下从发动机返回到LPG储罐,所以LPG储罐中的温度升高。
因此,LPG储罐中的温度变得高于汽油箱中的温度。此外,在外部温度非常高例如炎热季节中的情况下,LPG储罐中的温度进一步升高,并且LPG储罐中的压力也同时增大。如果LPG储罐中的压力变得高于LPG加气压力,则不可能再加LPG。
考虑到汽油箱中的汽油的温度低于LPG储罐中的LPG的温度,为了降低LPG储罐中的压力,汽油箱中的一些汽油被供给到LPG储罐中,以使用所供给的汽油来冷却LPG储罐的内部并降低LPG的蒸气压。
在下文中,将描述根据本发明的实施例的双燃料车辆的LPG储罐冷却系统的构造。
图3是示出根据本发明的实施例的双燃料车辆的LPG储罐冷却系统的构造的视图。在图3中,参考标记10表示用于储存汽油的汽油箱,参考标记20表示用于储存LPG的LPG储罐。
汽油箱10和LPG储罐20与单个发动机30连接,以便分别向发动机30供给汽油和LPG。
特别地,汽油箱10通过汽油供给线路11与发动机30连接,并且LPG储罐20通过LPG供给线路21与发动机30连接。
LPG储罐20也通过LPG返回线路22与发动机30连接。具有压力传感器23的调节器24安装在LPG供给线路21和LPG返回线路22中。
当来自LPG储罐20的LPG通过LPG供给线路21供给到发动机30并且未燃烧的LPG通过LPG返回线路22返回到LPG储罐20时,调节器24控制LPG的流量并且感测LPG的压力。
特别地,当来自LPG储罐或LPG箱20的LPG通过LPG供给线路21供给到发动机30时,包括在调节器24中的压力传感器23感测通过调节器24的LPG的压力,并且将感测的压力作为指示LPG储罐20中的压力的信号传输到控制器(ECU)50。
根据本发明的实施例,LPG储罐20设置有用于储存来自汽油箱10的汽油的辅助室40。辅助室40中的汽油与LPG储罐的内部空间和LPG储罐中的LPG进行热交换,以冷却LPG储罐和LPG储罐中的LPG。
参照图4和图5,辅助室40包括凸缘部分42和热交换室44,凸缘部分42以阶梯形式位于形成在LPG储罐20中的安装孔25上,热交换室44从凸缘部分42延伸到LPG储罐中。辅助室40优选地可以由具有高传热速率的铝材料制成。
更优选地,为了确保适于LPG储罐20的内部容积的足够的热交换面积,热交换室44可以形成为各种形状,例如直管、Z形管等。
另外,止回阀46安装到辅助室40的热交换室44的远端部分,以允许LPG从热交换室44只流入LPG储罐20。
当辅助室40安装在LPG储罐20中时,热交换室44通过LPG储罐20中的安装孔25插入到LPG储罐20中,使得凸缘部分42位于安装孔25的外周缘,密封盖48与凸缘部分42紧密接触,并且螺栓从密封盖48通过凸缘部分42紧固到LPG储罐20。
从汽油供给线路11分叉的第一燃料分支线路13通过密封盖48,并且第一燃料分支线路13的远端部分与辅助室40可连通地连接。
特别地,从在汽油箱10和发动机30之间连接的汽油供给线路11分叉的第一燃料分支线路13穿过密封盖48,并且与辅助室40可连通地连接。
第一燃料分支线路13设置有第一电磁阀14,该第一电磁阀响应于来自控制器50的控制信号打开或关闭,以允许或中断汽油从汽油箱10流入辅助室40。
另外,第二燃料分支线路26从连接在安装在LPG储罐20中的LPI泵27和发动机30之间的LPG供给线路21分叉,并且还与辅助室40可连通地连接。
第二燃料分支线路26还设置有第二电磁阀28,该第二电磁阀响应于来自控制器50的控制信号打开或关闭,以允许或中断一些LPG从LPG储罐20流入辅助室40。
如图6所示,作为能够在较短时间量内将固定量的汽油从第一燃料分支线路26喷射到热交换室44中的一种喷射泵的喷嘴45安装在辅助室40的入口。
如图7所示,用于测量供给到辅助室40的汽油量并将测量结果传输到控制器50的流量计43进一步安装在连接在第一电磁阀14和辅助室40之间的第一燃料分支线路13中。
用于测量LPG储罐20中的LPG剩余量的LPG计量器29安装在LPG储罐20中,并且由LPG计量器29测量的LPG剩余量作为指示LPG剩余量的信号被传输到控制器50。
在确定从压力传感器23接收的LPG储罐20中的压力等于或高于参考压力时,控制器50执行控制,使得第一电磁阀14打开。另外,控制器50基于从LPG计量器29接收的作为信号的LPG储罐20中的LPG剩余量来控制第一电磁阀14打开的时间量。
来自汽油箱10的汽油通过第一电磁阀14供给到辅助室40的热交换室44,并且与LPG储罐的内部空间和LPG储罐中的LPG进行热交换。因此,LPG储罐的内部被冷却。因此,LPG储罐中的温度降低,并且LPG的蒸气压也降低。
由于LPG储罐20的内部被冷却并且LPG的蒸气压降低,所以LPG储罐20中的压力变得低于参考值。因此,可以容易地为LPG储罐20再加LPG。
同时,当在第一电磁阀14关闭的状态下操作LPI泵27时,控制器50执行控制,使得第二电磁阀28打开预定的时间段,因此,从LPG储罐20供给到发动机30的一些LPG被供给到辅助室40的热交换室44并且与汽油混合。
此时,控制器50执行控制,使得LPI泵27在最大运行水平下操作预定的时间段,使得LPG与汽油快速混合。
因此,LPG容易地与辅助室40的热交换室44中的汽油混合,并且辅助室40中的压力通过LPI泵的增压力而增加,LPI泵在最大运行水平下执行泵送。安装在热交换室44的下端的止回阀46被打开,并且热交换室44中的汽油和LPG全部排放到LPG储罐20中。
因此,辅助室40的热交换室44变空。在LPG储罐中的压力未降低至参考压力以下的状态下,可以重复执行上述为辅助室40加汽油的过程,以冷却LPG储罐的内部。
当汽油与LPG混合时,由于汽油的温度低于LPG的温度,所以汽油降低了LPG的蒸气压。
汽油和LPG是包括C和H的化合物(汽油和LPG仅在C原子和H原子的数量方面彼此不同)。因此,当汽油与LPG混合时,使混合物燃烧没有任何问题。然而,为了符合相关规定,控制器50可以控制第一电磁阀打开的时间量,使得供给到辅助室中的汽油量小于LPG量的10%。
如图7所示,分隔壁18安装在LPG储罐20中,以将LPG储罐20的内部分隔成其中设置有辅助室的空间和其中设置有LPI泵的空间。分隔壁18防止汽油被直接供给到LPI泵。
在下文中,将描述具有上述构造的根据本发明的实施例的LPG储罐冷却系统的操作。
图8是示出根据本发明的实施例的LPG储罐冷却系统的操作的流程图,图9至图11是示出根据本发明的实施例的LPG储罐冷却系统的操作的视图。
首先,感测LPG储罐20中的压力。
特别地,使用压力传感器23感测LPG储罐20中的压力,并且将感测到的压力作为信号传输到控制器50。
随后,控制器50将LPG储罐20中的压力与上参考值(例如11巴)进行比较(S101)。
当LPG储罐20中的压力低于上参考值(例如11bar)时,控制器50执行控制,使得第一电磁阀14关闭(S102)。
由于第一电磁阀14关闭,汽油箱10中的汽油仅供给到发动机。在实施例中,汽油箱10中的汽油不供给到安装在LPG储罐20中的辅助室40。
当LPG储罐20中的压力高于上参考值(例如11bar)时,控制器50执行控制,使得第一电磁阀14打开(S103)。
因此,如图9所示,来自汽油箱10的汽油被供给到发动机,并且同时一些汽油通过第一电磁阀14并被供给到辅助室40的热交换室44(S104)。
辅助室40的热交换室44中的汽油与LPG储罐的内部空间和LPG储罐中的LPG进行热交换。因此,LPG储罐的内部被冷却。因此,LPG储罐的温度和LPG的温度降低,并且LPG的蒸气压也降低。
由于LPG储罐20的内部被冷却并且LPG的蒸气压降低,所以LPG储罐20中的压力变得低于参考值(例如11巴)。因此,可以容易地为LPG储罐20再加LPG。
此时,控制器50将第一电磁阀14打开的时间量与参考时间(例如,将汽油供给到辅助室的热交换室中的时间,约5秒)进行比较(S105)。在确定第一电磁阀14打开的时间量超过参考时间时,控制器50立即执行控制,使得第一电磁阀14关闭(S106)。
在步骤S106之后,当通过对LPI泵27的操作来将LPG储罐20中的LPG供给到发动机30时,控制器50执行控制,使得第二电磁阀28打开(S107)。
因此,如图10所示,从LPG储罐20供给到发动机30的一些LPG被供给到辅助室40的热交换室44,并与汽油混合。
如果供给到辅助室40的热交换室44中的LPG与汽油混合,那么由于汽油的温度低于LPG的温度,所以通过与汽油的热交换,LPG的蒸气压进一步降低。此外,LPG储罐的温度和LPG的温度进一步降低,因此,可以容易地为LPG储罐20再加LPG。
此时,为了向热交换室44快速供给LPG以与汽油混合,控制器50执行控制,使得LPI泵27以最大运行水平泵送LPG(S108)。
随后,控制器50将LPI泵27在最大运行水平下操作的时间量与参考时间(例如10秒)进行比较(S109)。在确定LPI泵27在最大运行水平下操作的时间量超过参考时间时,控制器50执行控制,使得LPI泵27在最大运行水平下的操作被解除。这是因为LPG储罐中的压力已经下降到低于参考压力的值(例如8至10巴)。
将由LPI泵27在最大运行水平下的操作所产生的压力施加到其中混合LPG和汽油的辅助室40的热交换室44中。因此,热交换室44内的压力增加得比LPG储罐20内的压力高。因此,安装在热交换室44的下端部的止回阀46打开。
因此,如图11所示,辅助室40的热交换室44中的汽油和LPG都通过打开的止回阀46排放到LPG储罐20中,并且辅助室40的热交换室44变空。
在LPG储罐20中的压力未降低至参考压力以下的状态下,可以重复执行上述为辅助室40加汽油的过程,以便冷却LPG储罐的内部。
如上所述,在外部温度非常高例如在炎热季节的情况下,使用温度低于LPG的温度的汽油来冷却LPG储罐的内部,并降低LPG的蒸气压。因此,可以减小LPG储罐中的压力,使得可以容易地为LPG储罐再加LPG。
在实施例中,参照图1至图11,双燃料车辆包括双燃料发动机30、汽油箱10、LPG箱20以及安装在LPG箱20中的热交换器40。双燃料发动机30能够基于两种或多种燃料运行,这些燃料是汽油燃料和LPG(液化丙烷气体或液化石油气)。汽油箱10容纳有汽油并且通过汽油供给线路11与发动机30连接,而LPG箱20容纳有LPG并且通过LPG供给线路21与发动机30连接。热交换器40设置在LPG箱中,并且包括通过从汽油供给线路11分支的汽油分支线路13与汽油箱10连接的容器。该容器通过从LPG供给线路21分支的LPG分支线路26与LPG箱20进一步连接。热交换器40包括止回阀46。
双燃料车辆进一步包括汽油阀14和LPG阀28。汽油阀14设置在汽油分支线路13上,并且控制汽油燃料朝热交换器40的容器的流动。LPG阀28设置在LPG分支线路26上,并且控制LPG朝热交换器40的容器的流动。车辆进一步包括控制器,该控制器包括一个或多个处理器。
控制器50基于LPG储罐20的压力控制汽油阀14和LPG阀28。在控制器50的控制下,打开汽油阀14,同时关闭LPG阀28,使得一部分汽油燃料被传输到热交换器40的容器,同时将汽油燃料供给到发动机30用以燃烧。随后,汽油阀14和LPG阀28关闭,使得汽油燃料和LPG在一个时间段期间不被传输到容器,以使容纳在容器40的容器中的汽油燃料与LPG箱20中容纳的LPG进行热交换。随后,当LPG供给到发动机30用以燃烧时,LPG阀28打开,同时汽油阀14关闭,使得一部分LPG被传输到热交换器的容器,其中该一部分LPG与容纳在该容器中的汽油混合。供给LPG增加热交换器40的容器中的压力,因此使得热交换器40的容器中的汽油和LPG的混合物通过止回阀46释放到LPG储罐20。在实施例中,在向热交换器40供给LPG时,不向热交换器40供给汽油燃料。进一步地,在向热交换器40供给汽油燃料时,不向热交换器40供给LPG。
从以上描述中显而易见,本发明的实施例具有以下效果。
第一,利用在汽油箱中汽油的温度低于在LPG储罐中LPG的温度的事实,通过将来自汽油箱的一些汽油供给到LPG储罐中的辅助室中,可以冷却LPG储罐的内部并且同时降低LPG储罐中的压力。
第二,利用通过将供给到LPG储罐中的辅助室的一些汽油与LPG混合产生的汽油的冷却效果,可以降低LPG的蒸气压。因此,可以进一步降低LPG储罐中的压力。
总之,在外部温度非常高例如在炎热季节的情况下,利用温度低于LPG温度的汽油来冷却LPG储罐的内部并降低LPG的蒸气压。因此,可以减小LPG储罐中的压力,使得可以容易地为LPG储罐再加LPG。
已经参照本发明的实施例详细地描述了本发明。然而,本领域的技术人员将理解,可以对这些实施例做出改变,而不脱离本发明的原理和精神,本发明的范围由所附权利要求及其等同物限定。
Claims (11)
1.一种双燃料车辆的LPG储罐冷却系统,其包括:
辅助室,其安装在所述双燃料车辆的LPG储罐中;
第一燃料分支线路,其从连接汽油箱和发动机的汽油供给线路分叉,所述第一燃料分支线路与所述辅助室连接;
第二燃料分支线路,其从连接安装在所述LPG储罐中的LPI泵和所述发动机的LPG供给线路分叉,所述第二燃料分支线路与所述辅助室连接;
第一阀,其安装在所述第一燃料分支线路中;
第二阀,其安装在所述第二燃料分支线路中;以及
控制器,其被配置为控制所述第一阀和所述第二阀,使得所述第一阀和所述第二阀基于所述LPG储罐中的压力打开或关闭。
2.根据权利要求1所述的LPG储罐冷却系统,其中所述辅助室包括:
凸缘部分,其位于形成在所述LPG储罐中的安装孔上;
热交换室,其从所述凸缘部分延伸到所述LPG储罐中;以及
密封盖,其附接到所述凸缘部分所位于的所述LPG储罐中的安装孔。
3.根据权利要求2所述的LPG储罐冷却系统,其中所述热交换室在所述热交换室的远端部分处设置有用于允许LPG从所述热交换室流入所述LPG储罐的止回阀。
4.根据权利要求2所述的LPG储罐冷却系统,其中所述辅助室由具有高传热速率的铝材料制成。
5.根据权利要求1所述的LPG储罐冷却系统,其中所述辅助室在所述辅助室的入口处设置有用于将汽油喷射到热交换室中的喷嘴。
6.根据权利要求1所述的LPG储罐冷却系统,其中所述第一燃料分支线路在所述第一燃料分支线路的第一阀和辅助室之间的一点处设置有用于测量供给到所述辅助室的汽油量的流量计。
7.根据权利要求1所述的LPG储罐冷却系统,其中所述LPG储罐在其中具有分隔壁,所述分隔壁用于将所述LPG储罐的内部分隔成其中设置有所述辅助室的空间和其中设置有所述LPI泵的空间,并且用于防止汽油被直接供给到所述LPI泵。
8.根据权利要求1所述的LPG储罐冷却系统,其中所述控制器基于来自安装在所述LPG储罐中的LPG计量器的LPG剩余量的测量信号来控制所述第一阀打开的时间量,以便确定供给到所述辅助室的汽油量。
9.根据权利要求1所述的LPG储罐冷却系统,其中当在所述第一阀关闭的状态下操作所述LPI泵时,所述控制器执行控制,使得所述第二阀打开预定的时间段,因此从所述LPG储罐向发动机供给的一部分LPG被供给到所述辅助室。
10.根据权利要求9所述的LPG储罐冷却系统,其中所述控制器执行控制,使得所述LPI泵在最大运行水平下被操作预定的时间段。
11.根据权利要求1所述的LPG储罐冷却系统,其中使用安装在LPG供给线路和LPG返回线路中的调节器的压力传感器来测量所述LPG储罐中的压力。
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CN107618361B (zh) | 2021-08-31 |
US20180017021A1 (en) | 2018-01-18 |
KR101745270B1 (ko) | 2017-06-08 |
US10344713B2 (en) | 2019-07-09 |
DE102016226316A1 (de) | 2018-01-18 |
DE102016226316B4 (de) | 2023-06-22 |
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