WO2016062189A1 - 一种双燃料汽车燃料供给控制方法及控制系统 - Google Patents

一种双燃料汽车燃料供给控制方法及控制系统 Download PDF

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Publication number
WO2016062189A1
WO2016062189A1 PCT/CN2015/091108 CN2015091108W WO2016062189A1 WO 2016062189 A1 WO2016062189 A1 WO 2016062189A1 CN 2015091108 W CN2015091108 W CN 2015091108W WO 2016062189 A1 WO2016062189 A1 WO 2016062189A1
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Prior art keywords
pressure sensor
pressure
control unit
fuel
electronic control
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PCT/CN2015/091108
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English (en)
French (fr)
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唐为义
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奇瑞汽车股份有限公司
芜湖普威技研有限公司
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Priority to US15/520,600 priority Critical patent/US20170306868A1/en
Publication of WO2016062189A1 publication Critical patent/WO2016062189A1/zh

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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
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • 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
    • F02D19/0602—Control of components of the fuel supply system
    • F02D19/0613—Switch-over from one fuel to another
    • F02D19/0615—Switch-over from one fuel to another being initiated by automatic means, e.g. based on engine or vehicle operating conditions
    • 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
    • F02D19/0623—Failure diagnosis or prevention; Safety measures; Testing
    • 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
    • F02D19/0626—Measuring or estimating parameters related to the fuel supply system
    • F02D19/0628—Determining the fuel pressure, temperature or flow, the fuel tank fill level or a valve position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
    • 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
    • F02D19/0639—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]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
    • F02D2041/223—Diagnosis of fuel pressure sensors
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the present invention relates to the field of vehicle control technologies, and in particular, to a dual fuel vehicle fuel supply control method and control system.
  • CNG Compressed Natural Gas
  • gasoline-CNG dual-fuel vehicles are gradually becoming more and more popular.
  • the existing gasoline-CNG dual fuel system usually determines the remaining amount of gas based on the cylinder high pressure sensor signal to inform the user to replenish the gas fuel in time, so the cylinder high pressure is used as the engine electronic control unit (English: Electronic Control Unit, Abbreviation: ECU)
  • ECU Electronic Control Unit
  • the condition for judging whether to perform oil and gas switching when the gas consumption is completed, that is, the control of exiting the CNG combustion mode is implemented according to the high pressure signal measured by the CNG cylinder high pressure sensor. When this signal is used as the exit judgment condition, it is often judged by a single value. Because the high-pressure pressure sensor has lower measurement accuracy when the gas pressure is lower, the fluctuation of the voltage signal will cause the output pressure signal to fluctuate.
  • ECU only passes Identify whether the high pressure signal meets the CNG combustion demand and automatically perform oil and gas switching.
  • the fluctuation of the high pressure signal may cause the engine to switch frequently when the CNG mode limit is exited. This not only seriously affects the user's driving. Feeling, but also brings hidden dangers for safe driving.
  • embodiments of the present invention provide a dual fuel vehicle fuel supply control method and control system.
  • the technical solution is as follows:
  • An aspect of an embodiment of the present invention provides a dual fuel vehicle fuel supply control method, including:
  • the electronic control unit detects the working state of the pressure sensor when the engine is in a gas state
  • the electronic control unit receives a pressure signal input by the pressure sensor, and the pressure signal is used to indicate a pressure value in a fuel gas cylinder;
  • the electronic control unit controls the engine to switch to the fuel state when the pressure value in the fuel gas cylinder continues to be less than or equal to the preset pressure value for a predetermined period of time or longer.
  • the detecting, by the electronic control unit, the working state of the pressure sensor includes:
  • the electronic control unit sends a diagnostic signal to the pressure sensor
  • the pressure sensor feeds back a detection signal to the electronic control unit according to the diagnostic signal, and the detection signal is used to indicate an operating state of the pressure sensor.
  • the method further includes:
  • the electronic control unit controls the alarm unit to issue a fault alarm.
  • the engine when the pressure value in the fuel gas cylinder is greater than a preset pressure value, or the pressure value in the fuel gas cylinder continues to be less than or equal to the preset pressure value for less than the preset time period, the engine remains in the gas In the state.
  • Another aspect of an embodiment of the present invention provides a dual fuel vehicle fuel supply control system including an electronic control unit and a pressure sensor, the electronic control unit for:
  • the engine is switched to the fuel state when the pressure value in the fuel gas cylinder continues to be less than or equal to the preset pressure value for a predetermined period of time or longer.
  • the pressure sensor is used to:
  • the dual fuel vehicle fuel supply control system further includes:
  • the alarm unit is configured to issue a fault alarm when the detection signal indicates that the pressure sensor is in an abnormal working state.
  • the dual fuel vehicle fuel supply control method and control system provided by the embodiment of the invention, when the engine is in a gas state, when the pressure sensor works normally, the electronic control unit receives the pressure signal input by the pressure sensor, if the pressure in the fuel gas cylinder If the value continues for less than or equal to the preset pressure value for more than or equal to the preset time period, it can be concluded that the fuel gas in the fuel gas cylinder has been difficult to meet the normal combustion demand, so that the engine can be effectively controlled to switch to the fuel state.
  • the fuel switching control can be accurately realized according to the gas remaining amount in the fuel gas cylinder, thereby avoiding the frequent switching of oil and gas caused by the signal fluctuation caused by the high pressure of the cylinder near the exiting limit point, and the lubricating oil is remarkably improved.
  • the user's driving experience and driving safety can be accurately realized according to the gas remaining amount in the fuel gas cylinder, thereby avoiding the frequent switching of oil and gas caused by the signal fluctuation caused by the high pressure of the cylinder near the exiting limit point, and the lubricating oil is remarkably improved.
  • FIG. 1 is a schematic flow chart of a fuel supply control method for a dual fuel vehicle according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram showing a determination process of a fuel supply control method for a dual fuel vehicle according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a dual fuel automobile fuel supply control system according to an embodiment of the present invention.
  • Embodiments of the present invention provide a dual fuel vehicle fuel supply control method, as shown in FIG. 1 , including:
  • Step 101 When the engine is in a gas state, the electronic control unit detects the working state of the pressure sensor.
  • Step 102 When the pressure sensor is working normally, the electronic control unit receives a pressure signal input by the pressure sensor, and the pressure signal is used to indicate a pressure value in the fuel gas cylinder.
  • Step 103 When the pressure value in the fuel gas cylinder continues to be less than or equal to the preset pressure value for more than or equal to the preset time length, the electronic control unit controls the engine to switch to the fuel state.
  • the dual fuel vehicle fuel supply control method when the engine is in a gas state, when the pressure sensor works normally, the electronic control unit receives the pressure signal input by the pressure sensor, if the pressure value in the fuel gas cylinder continues to be less than If the time equal to the preset pressure value is greater than or equal to the preset time length, it can be concluded that the fuel gas in the fuel gas cylinder has been difficult to meet the normal combustion demand, so that the engine can be effectively controlled to switch to the fuel state.
  • the fuel switching control can be accurately realized according to the gas remaining amount in the fuel gas cylinder, thereby avoiding the frequent switching of oil and gas caused by the signal fluctuation caused by the high pressure of the cylinder near the exiting limit point, and the lubricating oil is remarkably improved.
  • the user's driving experience and driving safety can be accurately realized according to the gas remaining amount in the fuel gas cylinder, thereby avoiding the frequent switching of oil and gas caused by the signal fluctuation caused by the high pressure of the cylinder near the exiting limit point, and the lubricating oil is remarkably improved.
  • the dual fuel refers to the gas (CNG) and the fuel, wherein the gas control and the fuel control may adopt a single electronic control unit ECU, that is, the fuel and the gas share an engine control unit, in the CNG. In the mode, all relevant signals of the gas system are involved in the ECU operation. Line processing.
  • the flow of the dual fuel vehicle fuel supply control method provided by the embodiment of the present invention can be as shown in FIG. 2 .
  • the ECU determines that the working state of the pressure sensor may specifically include:
  • the electronic control unit sends a diagnostic signal to the pressure sensor.
  • the working state of the pressure sensor may include a normal working state and an abnormal working state (also referred to as an abnormal working state). Therefore, the detecting signal may indicate that the working state of the pressure sensor is normal or indicates that the working state of the pressure sensor is abnormal. .
  • the detection signal received by the electronic control unit indicates that the pressure sensor is in a normal working state, the pressure sensor operates normally; when the detection signal received by the electronic control unit indicates that the pressure sensor is in an abnormal working state, the pressure sensor is not working normally, that is, the pressure sensor works.
  • the status is abnormal and corresponding troubleshooting is required.
  • the electronic control unit may control the alarm unit to issue a fault alarm.
  • the existing ECU usually has a component diagnostic function, so that the fuel cell pressure sensor body and the signal rationality can be diagnosed based on the component diagnostic function of the ECU to determine whether the signal output value is too high. Or too low and the signal is unreasonable to further determine whether the cylinder high pressure sensor is working properly. If the current cylinder high pressure sensor fails, the ECU can promptly report the associated fault code to remind the user to perform the sensor body or line troubleshooting in time to eliminate the fault.
  • the pressure signal acquired by the ECU is credible.
  • the preset pressure value compared with the pressure value in the fuel gas cylinder indicated by the pressure signal can be selected according to the actual situation. For example, it can be determined that the residual gas of the cylinder can not meet the normal combustion demand by referring to the working environment of the engine, the characteristics of the use characteristics of the cylinder, and the actual situation of the user, thereby determining the minimum limit, which may be a certain value ( For example, 0.1 MPa) may also be a numerical range (for example, 0.05-2.5 MPa), which is not limited by the embodiment of the present invention.
  • a delay function for comparing the pressure signals can be added in the ECU policy structure. Referring to the credible pressure signal obtained by the ECU, the pressure value recorded by the signal is compared with the lowest limit of the CNG mode when the pressure is too low, and the duration below the minimum limit is The comparison is made with the preset duration T.
  • the ECU If the pressure value in the fuel gas cylinder obtained by the ECU continues to be lower than the set value for more than or equal to T, the ECU considers that the condition for exiting the CNG mode is satisfied, and the ECU continues to perform the control function of switching to the gasoline; if the ECU acquires When the pressure value in the fuel gas cylinder continues to be lower than the set value for less than T, it remains in the gas state.
  • the calibration setting of the time T should be reasonably set according to the actual situation. It should not be too small or too large. If it is too small, there will still be frequent switching problems caused by pressure fluctuations; if it is too large, the actual cylinder pressure will be high. If the pressure is too low, it does not meet the current combustion demand, and the short-term jitter or flameout of the engine caused by the CNG mode has been used.
  • the dual fuel vehicle fuel supply control system provided by the embodiment of the present invention, as shown in FIG. 3, includes an electronic control unit 31 and a pressure sensor 32, wherein the electronic control unit 31 is configured to:
  • the operating state of the pressure sensor 32 is detected while the engine is in a gas state.
  • the engine is switched to the fuel state when the pressure value in the fuel gas cylinder continues to be less than or equal to the preset pressure value for a predetermined period of time or longer.
  • the dual fuel automobile fuel supply control system provided by the embodiment of the present invention, when the engine is in a gas state, when the pressure sensor works normally, the electronic control unit receives the pressure signal input by the pressure sensor, if the pressure value in the fuel gas cylinder continues to be less than If the time equal to the preset pressure value is greater than or equal to the preset time length, it can be concluded that the fuel gas in the fuel gas cylinder has been difficult to meet the normal combustion demand, so that the engine can be effectively controlled to switch to the fuel state.
  • the fuel switching control can be accurately realized according to the gas remaining amount in the fuel gas cylinder, thereby avoiding the frequent switching of oil and gas caused by the signal fluctuation caused by the high pressure of the cylinder near the exiting limit point, and the lubricating oil is remarkably improved.
  • the user's driving experience and driving safety can be accurately realized according to the gas remaining amount in the fuel gas cylinder, thereby avoiding the frequent switching of oil and gas caused by the signal fluctuation caused by the high pressure of the cylinder near the exiting limit point, and the lubricating oil is remarkably improved.
  • the pressure sensor 32 can be used to:
  • the diagnostic signal transmitted by the electronic control unit 31 is received.
  • the detection signal is fed back to the electronic control unit 31 based on the diagnostic signal, the detection signal being used to indicate the operating state of the pressure sensor 32.
  • the dual fuel vehicle fuel supply control system may further include:
  • the alarm unit 33 is configured to issue a fault alarm when the detection signal indicates that the pressure sensor 32 is abnormal.
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
  • the storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

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Abstract

本发明公开了一种双燃料汽车燃料供给控制方法及控制系统，属于车辆控制技术领域。方法包括：在发动机处于燃气状态下，电子控制单元检测压力传感器的工作状态；当所述压力传感器正常工作时，所述电子控制单元接收所述压力传感器输入的压力信号，所述压力信号用于表示燃料气瓶内的压力值；当所述燃料气瓶内的压力值持续小于等于预设压力值的时间大于等于预设时长时，所述电子控制单元控制所述发动机切换至燃油状态。该方法可以准确地根据燃料气瓶内的燃气余量实现燃料切换控制，从而能够避免在气瓶高压压力临近退出界限点出现的信号波动而导致的油气频繁切换现象。

Description

一种双燃料汽车燃料供给控制方法及控制系统
本申请要求于2014年10月23日提交中国专利局、申请号为201410572300.7、发明名称为“一种双燃料汽车燃料供给控制方法及控制系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及车辆控制技术领域，特别涉及一种双燃料汽车燃料供给控制方法及控制系统。
背景技术
压缩天然气(英文：Compressed Natural Gas，简称：CNG)作为一种洁净的能源，其与汽油燃料相比，使用天然气作为燃料的新能源汽车的尾气排放水平大幅度下降。且天然气以气态进入发动机，在发动机中与空气可以实现均匀混合，燃烧比较完全，因此可以提高热循环效率，加快燃烧速度，从而充分利用燃烧热能；同时CNG的辛烷值比汽油高，因而其抗爆性相对较高；此外，天然气的价格与汽油价格相比较为低廉稳定。综上，汽油-CNG双燃料汽车逐渐开始被越来越多的人所关注。
现有的汽油-CNG双燃料系统通常基于气瓶高压压力传感器信号判断燃气的剩余量，以告知使用者及时补充燃气燃料，因此将气瓶高压压力作为发动机电子控制单元(英文：Electronic Control Unit，简称：ECU)在燃气消耗完毕时判断是否进行油气切换的条件，即根据CNG气瓶高压压力传感器测得的高压压力信号来实施退出CNG燃烧模式的控制。而此信号在作为退出判断条件时，多采用一个单值的形式进行比较判断，由于高压压力传感器在燃气压力较低时的测量精度降低，电压信号的波动将导致输出的压力信号出现波动，而ECU仅通过 辨识该高压压力信号是否满足CNG燃烧需求自动执行油气切换，高压压力信号的波动极有可能引发在临近退出CNG模式限值时，发动机将出现油气频繁切换的现象，这不仅严重影响了用户的驾驶感受，同时也为安全行车带来了隐患。
发明内容
为了避免在气瓶高压压力临近退出界限点出现的信号波动而导致的油气频繁切换现象，本发明实施例提供了一种双燃料汽车燃料供给控制方法及控制系统。所述技术方案如下：
本发明实施例的一方面，提供了一种双燃料汽车燃料供给控制方法，包括：
在发动机处于燃气状态下，电子控制单元检测压力传感器的工作状态；
当所述压力传感器正常工作时，所述电子控制单元接收所述压力传感器输入的压力信号，所述压力信号用于表示燃料气瓶内的压力值；
当所述燃料气瓶内的压力值持续小于等于预设压力值的时间大于等于预设时长时，所述电子控制单元控制所述发动机切换至燃油状态。
具体的，所述电子控制单元检测压力传感器的工作状态包括：
所述电子控制单元向所述压力传感器发送诊断信号；
所述压力传感器根据所述诊断信号向所述电子控制单元反馈检测信号，所述检测信号用于指示所述压力传感器的工作状态。
此外，当所述检测信号指示所述压力传感器工作状态异常时，所述方法还包括：
所述电子控制单元控制报警单元发出故障报警。
进一步的，当所述燃料气瓶内的压力值大于预设压力值，或所述燃料气瓶内的压力值持续小于等于预设压力值的时间小于所述预设时长时，发动机保持在燃气状态下。
本发明实施例的另一方面，提供了一种双燃料汽车燃料供给控制系统，包括电子控制单元及压力传感器，所述电子控制单元用于：
在发动机处于燃气状态下，检测所述压力传感器的工作状态；
当所述压力传感器正常工作时，接收所述压力传感器输入的压力信号，所述压力信号用于表示燃料气瓶内的压力值；
当所述燃料气瓶内的压力值持续小于等于预设压力值的时间大于等于预设时长时，控制所述发动机切换至燃油状态。
具体的，所述压力传感器用于：
接收所述电子控制单元发送的诊断信号；
根据所述诊断信号向所述电子控制单元反馈检测信号，所述检测信号用于指示所述压力传感器的工作状态。
进一步的，所述双燃料汽车燃料供给控制系统还包括：
报警单元，用于当所述检测信号指示所述压力传感器工作状态异常时，发出故障报警。
本发明实施例提供的双燃料汽车燃料供给控制方法及控制系统，在发动机处于燃气状态下，当压力传感器正常工作时，电子控制单元通过接收压力传感器输入的压力信号，若燃料气瓶内的压力值持续小于等于预设压力值的时间大于等于预设时长，则可以断定燃料气瓶内的燃料气体已经难以满足正常的燃烧需求，从而可以有效地控制发动机切换至燃油状态。采用这样一种方法可以准确地根据燃料气瓶内的燃气余量实现燃料切换控制，从而能够避免在气瓶高压压力临近退出界限点出现的信号波动而导致的油气频繁切换现象，显著地提高了用户的驾驶感受与行车的安全性。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例提供的一种双燃料汽车燃料供给控制方法的流程示意图；
图2是本发明实施例提供的一种双燃料汽车燃料供给控制方法的判定流程示意图；
图3是本发明实施例提供的一种双燃料汽车燃料供给控制系统的结构示意图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明实施方式作进一步地详细描述。
本发明实施例提供了一种双燃料汽车燃料供给控制方法，如图1所示，包括：
步骤101、在发动机处于燃气状态下，电子控制单元检测压力传感器的工作状态。
步骤102、当压力传感器正常工作时，电子控制单元接收压力传感器输入的压力信号，该压力信号用于表示燃料气瓶内的压力值。
步骤103、当燃料气瓶内的压力值持续小于等于预设压力值的时间大于等于预设时长时，电子控制单元控制发动机切换至燃油状态。
本发明实施例提供的双燃料汽车燃料供给控制方法，在发动机处于燃气状态下，当压力传感器正常工作时，电子控制单元通过接收压力传感器输入的压力信号，若燃料气瓶内的压力值持续小于等于预设压力值的时间大于等于预设时长，则可以断定燃料气瓶内的燃料气体已经难以满足正常的燃烧需求，从而可以有效地控制发动机切换至燃油状态。采用这样一种方法可以准确地根据燃料气瓶内的燃气余量实现燃料切换控制，从而能够避免在气瓶高压压力临近退出界限点出现的信号波动而导致的油气频繁切换现象，显著地提高了用户的驾驶感受与行车的安全性。
需要说明的是，在本发明实施例中，双燃料是指燃气(CNG)与燃油，其中，燃气控制与燃油控制可以采用单一电子控制单元ECU，即燃油和燃气共用一个发动机控制单元，在CNG模式下，燃气系统的各相关信号均参与ECU运 行处理。
本发明实施例提供的双燃料汽车燃料供给控制方法的流程可以如图2所示。
其中，ECU判定压力传感器的工作状态具体可以包括：
电子控制单元向压力传感器发送诊断信号。
在本发明实施例中，压力传感器的工作状态可以包括正常工作状态和异常工作状态(也称非正常工作状态)两种，因此，检测信号可以指示压力传感器工作状态正常或者指示压力传感器工作状态异常。当电子控制单元接收到的检测信号指示压力传感器工作状态正常，说明压力传感器正常工作；当电子控制单元接收到的检测信号指示压力传感器工作状态异常，说明压力传感器非正常工作，也即压力传感器工作状态异常，需要进行相应的故障诊断。
进一步的，当检测信号指示所述压力传感器工作状态异常时，电子控制单元可以控制报警单元发出故障报警。
具体的，现有的ECU通常具备零部件诊断功能，因此可以基于ECU所具备的零部件诊断功能，对燃料气瓶压力传感器本体及信号的合理性进行诊断，以确定是否出现信号输出值过高或过低以及信号不合理现象，从而进一步判定气瓶高压压力传感器工作是否正常。若出现当前气瓶高压压力传感器故障，则ECU可及时报出相关联故障码，提醒使用者及时进行传感器本体或线路排查，排除故障。
在本发明实施例中，当ECU判定压力传感器正常工作时，ECU所获取到的压力信号可信。与压力信号所表示的燃料气瓶内的压力值相比较的预设压力值可以根据实际情况进行选定。例如，可以参照发动机各工作环境、钢瓶使用特性要求以及使用者的实际情况合理判断气瓶残余燃气不能够满足正常的燃烧需求，从而定出该最低限值，该最低值可以是一个确定数值(如0.1MPa)，也可以是一个数值范围(如0.05-2.5MPa)，本发明实施例对此并不做限定。
为了实现压力信号的延时比较，可以在ECU策略结构增加对压力信号比较的延时功能。参照ECU获取到的可信的压力信号，将该信号记录的压力值与压力过低退出CNG模式的最低限值进行比较，同时并将低于该最低限值的持续时 间与预设时长T相比较。若ECU获取到的燃料气瓶内的压力值持续低于设定值的时间大于等于T，则ECU认为满足退出CNG模式的条件，进而ECU继续执行切换到汽油的控制功能；若ECU获取到的燃料气瓶内的压力值持续低于设定值的时间小于T，则保持在燃气状态下。其中，该时间T的标定设定应根据实际情况合理设置，不可过小亦不可过大，过小，则仍然出现因压力波动导致的频繁切换问题；过大，则因此时实际的气瓶高压压力过低，确实不能满足当前燃烧需求，而一直采用CNG模式所引起的发动机短时抖动或熄火现象。
本发明实施例提供的双燃料汽车燃料供给控制系统，如图3所示，包括电子控制单元31及压力传感器32，其中，电子控制单元31用于：
在发动机处于燃气状态下，检测压力传感器32的工作状态。
当压力传感器32正常工作时，接收压力传感器32输入的压力信号，压力信号用于表示燃料气瓶内的压力值。
当燃料气瓶内的压力值持续小于等于预设压力值的时间大于等于预设时长时，控制发动机切换至燃油状态。
本发明实施例提供的双燃料汽车燃料供给控制系统，在发动机处于燃气状态下，当压力传感器正常工作时，电子控制单元通过接收压力传感器输入的压力信号，若燃料气瓶内的压力值持续小于等于预设压力值的时间大于等于预设时长，则可以断定燃料气瓶内的燃料气体已经难以满足正常的燃烧需求，从而可以有效地控制发动机切换至燃油状态。采用这样一种方法可以准确地根据燃料气瓶内的燃气余量实现燃料切换控制，从而能够避免在气瓶高压压力临近退出界限点出现的信号波动而导致的油气频繁切换现象，显著地提高了用户的驾驶感受与行车的安全性。
进一步的，压力传感器32可以用于：
接收电子控制单元31发送的诊断信号。
根据该诊断信号向电子控制单元31反馈检测信号，该检测信号用于指示压力传感器32的工作状态。
进一步的，如图3所示，双燃料汽车燃料供给控制系统还可以包括：
报警单元33，用于当检测信号指示压力传感器32状态异常时，发出故障报警。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成，也可以通过程序来指令相关的硬件完成，所述的程序可以存储于一种计算机可读存储介质中，上述提到的存储介质可以是只读存储器，磁盘或光盘等。
以上所述仅为本发明的较佳实施例，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (7)

  1. 一种双燃料汽车燃料供给控制方法，其特征在于，包括：
    在发动机处于燃气状态下，电子控制单元检测压力传感器的工作状态；
    当所述压力传感器正常工作时，所述电子控制单元接收所述压力传感器输入的压力信号，所述压力信号用于表示燃料气瓶内的压力值；
    当所述燃料气瓶内的压力值持续小于等于预设压力值的时间大于等于预设时长时，所述电子控制单元控制所述发动机切换至燃油状态。
  2. 根据权利要求1所述的双燃料汽车燃料供给控制方法，其特征在于，所述电子控制单元检测压力传感器的工作状态包括：
    所述电子控制单元向所述压力传感器发送诊断信号；
    所述压力传感器根据所述诊断信号向所述电子控制单元反馈检测信号，所述检测信号用于指示所述压力传感器的工作状态。
  3. 根据权利要求2所述的双燃料汽车燃料供给控制方法，其特征在于，当所述检测信号指示所述压力传感器工作状态异常时，所述方法还包括：
    所述电子控制单元控制报警单元发出故障报警。
  4. 根据权利要求2所述的双燃料汽车燃料供给控制方法，其特征在于，当所述燃料气瓶内的压力值大于预设压力值，或所述燃料气瓶内的压力值持续小于等于预设压力值的时间小于所述预设时长时，发动机保持在燃气状态下。
  5. 一种双燃料汽车燃料供给控制系统，包括电子控制单元及压力传感器，其特征在于，所述电子控制单元用于：
    在发动机处于燃气状态下，检测所述压力传感器的工作状态；
    当所述压力传感器正常工作时，接收所述压力传感器输入的压力信号，所述压力信号用于表示燃料气瓶内的压力值；
    当所述燃料气瓶内的压力值持续小于等于预设压力值的时间大于等于预设时长时，控制所述发动机切换至燃油状态。
  6. 根据权利要求5所述的双燃料汽车燃料供给控制系统，其特征在于，所述压力传感器用于：
    接收所述电子控制单元发送的诊断信号；
    根据所述诊断信号向所述电子控制单元反馈检测信号，所述检测信号用于指示所述压力传感器的工作状态。
  7. 根据权利要求6所述的双燃料汽车燃料供给控制系统，其特征在于，所述双燃料汽车燃料供给控制系统还包括：
    报警单元，用于当所述检测信号指示所述压力传感器工作状态异常时，发出故障报警。
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Publication number Priority date Publication date Assignee Title
CN104454185A (zh) * 2014-10-23 2015-03-25 奇瑞汽车股份有限公司 一种双燃料汽车燃料供给控制方法及控制系统
DE102016204761A1 (de) * 2016-03-22 2017-09-28 Bayerische Motoren Werke Aktiengesellschaft Verfahren, Vorrichtung und mobiles Anwendergerät zur Anpassung eines Energieverwertungsvorgangs eines Kraftfahrzeugs
DE102016206800A1 (de) * 2016-04-21 2017-10-26 Bayerische Motoren Werke Aktiengesellschaft Verfahren, Vorrichtung und mobiles Anwendergerät zur Anpassung einer Energieversorgung eines Antriebssystems eines Fahrzeugs
JP6819214B2 (ja) * 2016-10-26 2021-01-27 スズキ株式会社 エンジンの自動停止装置
CN109184930A (zh) * 2018-10-31 2019-01-11 奇瑞汽车股份有限公司 发动机系统燃料供给控制方法和装置、存储介质
CN110107411A (zh) * 2019-05-15 2019-08-09 吴家全 一种油气转换方法、装置、计算设备及汽车
CN111691995B (zh) * 2020-06-23 2022-05-03 奇瑞汽车股份有限公司 燃油蒸汽控制方法及装置
CN114383645A (zh) * 2020-10-16 2022-04-22 上海汽车集团股份有限公司 柴油机中电容式传感器的故障检测方法及相关设备
CN113074052B (zh) * 2021-05-07 2023-04-18 潍柴动力股份有限公司 一种混合动力车辆的燃气压力控制方法及混合动力车辆
CN114542331B (zh) * 2022-01-28 2023-06-09 无锡威孚高科技集团股份有限公司 双燃料喷射系统及车辆控制系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4838295A (en) * 1986-08-21 1989-06-13 Airsensors, Inc. System for controlling mass flow rates of two gases
CN102695865A (zh) * 2010-12-01 2012-09-26 丰田自动车株式会社 双燃料发动机的控制装置
CN102782291A (zh) * 2010-03-10 2012-11-14 丰田自动车株式会社 内燃机的异常检测装置
CN103958860A (zh) * 2011-11-30 2014-07-30 爱三工业株式会社 双燃料内燃机的燃料供给控制装置以及在双燃料内燃机中切换燃料的方法
CN104454185A (zh) * 2014-10-23 2015-03-25 奇瑞汽车股份有限公司 一种双燃料汽车燃料供给控制方法及控制系统

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004239114A (ja) * 2003-02-04 2004-08-26 Toyota Motor Corp バイフューエルエンジンの燃料供給制御装置および方法
JP4657140B2 (ja) * 2006-04-24 2011-03-23 日立オートモティブシステムズ株式会社 エンジンの燃料供給装置
CN101871403B (zh) * 2009-04-22 2014-04-02 通用汽车环球科技运作公司 在驱动状态期间压力传感器的诊断系统和方法
CN102635450B (zh) * 2012-04-26 2014-07-30 奇瑞汽车股份有限公司 一种汽车双燃料转换控制的方法和装置
KR101807008B1 (ko) * 2012-07-20 2017-12-08 현대자동차 주식회사 연속 가변 밸브 리프트 엔진의 제어 방법
CN103993965B (zh) * 2013-02-17 2017-08-04 西安友科电子科技有限公司 一种lpg/cng汽车双燃料电喷控制方法
CN103437892B (zh) * 2013-09-04 2016-03-09 阿特拉斯科普柯(南京)建筑矿山设备有限公司 发动机的启动方法和系统
CN203756343U (zh) * 2013-11-26 2014-08-06 北汽福田汽车股份有限公司 两用燃料车型电子控制系统及车辆

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4838295A (en) * 1986-08-21 1989-06-13 Airsensors, Inc. System for controlling mass flow rates of two gases
CN102782291A (zh) * 2010-03-10 2012-11-14 丰田自动车株式会社 内燃机的异常检测装置
CN102695865A (zh) * 2010-12-01 2012-09-26 丰田自动车株式会社 双燃料发动机的控制装置
CN103958860A (zh) * 2011-11-30 2014-07-30 爱三工业株式会社 双燃料内燃机的燃料供给控制装置以及在双燃料内燃机中切换燃料的方法
CN104454185A (zh) * 2014-10-23 2015-03-25 奇瑞汽车股份有限公司 一种双燃料汽车燃料供给控制方法及控制系统

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US20170306868A1 (en) 2017-10-26

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