CN100412342C - Method for detecting disconnection of an on signal-transmitting line of an LPG switch - Google Patents

Method for detecting disconnection of an on signal-transmitting line of an LPG switch Download PDF

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Publication number
CN100412342C
CN100412342C CNB2006100789145A CN200610078914A CN100412342C CN 100412342 C CN100412342 C CN 100412342C CN B2006100789145 A CNB2006100789145 A CN B2006100789145A CN 200610078914 A CN200610078914 A CN 200610078914A CN 100412342 C CN100412342 C CN 100412342C
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CN
China
Prior art keywords
timer
time
lpg
lpg switch
liquefied petroleum
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Expired - Fee Related
Application number
CNB2006100789145A
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Chinese (zh)
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CN1924331A (en
Inventor
李禹稙
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Hyundai Motor Co
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Hyundai Motor Co
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Publication of CN1924331A publication Critical patent/CN1924331A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
    • 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
    • F02M21/0203—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
    • 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
    • F02D19/02—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 gaseous fuels
    • F02D19/025—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
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biomedical Technology (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Transmitters (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

The present invention relates to a method for detecting disconnection of an on signal-transmitting line of an LPG switch of the present invention, for distinguishing the turnoff in the practical operation (namely, 'turn-on' status). If the fuel is prevented being transmitted from the fuel bottle because of the practical operation of LPG switch, the engine will keep working till the fuel in the fuel pipe is exhausted. But, if the turnoff happens in the circuit (namely, turn-on signal transmission line), the engine will keep work till the ignition device is closed. Therefore, by these factors, we can make sure whether the turn-on signal transmission line or the LPG switch is turnoff.

Description

The detecting method that LPG switch connection signal transmssion line opens circuit
The related application of quoting
The application requires preference and the rights and interests of on August 30th, 2005 at the korean patent application 10-2005-0080173 of Korea S Department of Intellectual Property submission, and its full content is incorporated herein by reference.
Technical field
The present invention relates to the detecting method that a kind of LPG switch connection signal transmssion line opens circuit.More specifically, the present invention relates to the detecting method that a kind of LPG switch connection signal transmssion line opens circuit, it has from the practical operation of LPG switch (that is " connection " state) distinguishes the advantage that opens circuit.
Background technique
Usually, use the vehicle of liquefied petroleum gas (LPG) (LPG) to comprise the LPG switch, be used for when having an accident, prevent LPG from fuel tank (tube) to the motor supply.
Such LPG switching manipulation is as follows.As shown in fig. 1, if the driver presses LPG switch 10, owing to will be respectively cut off to the driving power supply 4 of closing solenoid valve 2a, cutting off solenoid valve 2b and petrolift supply, so petrolift stops, and closes solenoid valve 2a and cut off solenoid valve 2b and close.Close solenoid valve and cut off solenoid valve respectively with respect to propellant bottle and engine arrangement.In addition, close although cut off solenoid valve 2b, the fuel that remains near the fuel pipe of motor makes engine operation up to running out of gas.Then, catch fire and shut down owing to motor lacks fuel oil.
Therefore because fuel is supplied to motor unconsciously, after the LPG switching manipulation, when motor owing to fuel pipe in residual fuel oil when turning round, the fault diagnosis of fuel feedback control, petrolift and lambda sensor (O2 sensor) must stop.Thereby, in order to make ECU determine whether the LPG switch is operated, LPG switch 10 is arranged in the control wiring of petrolift relay 6, make the petrolift relay to close by interface box 20, in addition, provide operation signal transmission line A to be used for the LPG switch is linked to each other with interface box 20, thereby pass to ECU by its operation signal with the LPG switch.
But being difficult to determine to lack operation signal is that circuit diagram as shown in Figure 1 by the practical operation generation or the generation because the operation signal transmission line opens circuit of LPG switch.That is to say that ECU opens circuit the operation signal transmission line (that is open-circuit condition) and the practical operation identification of LPG switch becomes identical.As a result, under open-circuit condition, ECU carry out open loop control thereby ECU does not carry out feedback control, and this can make the fault diagnosis of petrolift and lambda sensor stop with its LPG switch that has been recognized as driver's operation.Yet fuel continues supply.Thereby, can produce the problem of excess exhaust gas discharging.
Above-mentionedly only be used to deepen understanding, so it may contain the information that is not formed in those of ordinary skills' known systems in this state to background of invention in the disclosed information of this background technique part.
Summary of the invention
The detecting method that provides a kind of LPG switch connection signal transmssion line to open circuit is provided in the present invention, and it has from the practical operation of LPG switch (that is " connection " state) distinguishes the advantage that opens circuit.A kind of be used to detect be installed in be used on the vehicle to prevent that the illustrative methods that LPG switch connection signal transmssion line that fuel is carried opens circuit from comprising: begin this method; When vehicle motor is in steady state operation, determine whether the LPG switch is operated; When the LPG switching manipulation, after the fault diagnosis of determining petrolift and lambda sensor stopped, whether ignition key closed: when ignition key was in " connection " state, whether function timer worked to determine motor; The time and the reference time of timer are compared; When time of timer during, after determining the situation that the connection signal transmission line opens circuit, add " 1 " to fault induction (error-sensing) counter greater than the reference time; Then, when within the predetermined time, when the fault sense counter added " 1 ", at the input fault code and after opening warning light, the replacement timer returned the beginning of this method then all the time.
In according to another embodiment of the invention, this method also comprises when the LPG switch does not operate and ignition key when being in " closing " state, behind the replacement timer, returns the beginning of this method.
In according to another embodiment of the invention, this method also comprises: when time of timer during less than the reference time, current rotating speed (RPM) and reference rotation velocity are compared, thereby determine whether motor shuts down; When current rotating speed during, turn back to and determine whether the LPG switch is operated greater than reference rotation velocity; And, behind the replacement timer, return the beginning of this method when current rotating speed during less than reference rotation velocity.
Description of drawings
Fig. 1 represents to be used to respond to the traditional circuit of LPG switching manipulation state.
Fig. 2 is a flow chart, and expression is used to detect the method that LPG switch connection signal transmssion line opens circuit according to an embodiment of the invention.
Embodiment
Describe one embodiment of the present of invention in detail below in conjunction with accompanying drawing.
Describe in detail according to an embodiment of the invention below in conjunction with Fig. 2, be used to detect the method that LPG switch connection signal transmssion line opens circuit.
Be used to detect the method that LPG switch connection signal transmssion line opens circuit according to an embodiment of the invention, identification is opened circuit from the practical operation (that is " connection " state) of LPG switch.If because the practical operation of LPG switch stops from the propellant bottle transfer the fuel, engine operation running out of gas in the fuel pipe then.But, be created in (that is, the connection signal transmission line) on the circuit if open circuit, then continuous firing is closed up to ignition mechanism.Therefore,, open circuit, or the LPG switch disconnects actually can determine connection signal transmission line (with reference to " A " among the figure 1) by these factors.
At first, as shown in Figure 2, in step S10, when engine operation was in normal state, electronic control unit (ECU) determined whether the LPG switch is operated.If LPG switch inoperation in step S20, then timer is reset, and this method is restarted.But in step 20-50, under the situation of LPG switching manipulation, after the fault diagnosis of petrolift and lambda sensor stopped, ECU determined whether ignition key closes.
In step S50, if ignition key is in " closing " state, then after timer was reset, this method was restarted.But, be under the situation of " unlatching " state at ignition key, in step S60, thereby whether the definite motor of ECU function timer shuts down.
In step S60, operate this timer, in step S70, ECU compares the time and the predetermined reference time of timer then.If the time of timer is in normal state greater than the reference time (about 5 minutes) and the work of motor, determines that then the connection signal transmission line of LPG switch disconnects, and in step S80, " 1 " is added on the fault sense counter.
In step S80,, then in step S90, be input to failure code among the ECU and the unlatching warning light if keep adding up the fault sense counter in the given time.Thereby replacement timer and this method are restarted.
In addition; in step S70; if the time of this timer is less than the reference time; that is, if motor in the reference time, shut down, then in step S100; ECU is with current rotating speed and reference rotation velocity (about 20rpm; that is to say, when ignition mechanism is connected) compare, thus determine whether motor shuts down.If determine current rotating speed greater than reference rotation velocity, then re-executes this method after whether definite LPG switch is operated.Under the definite situation of current rotating speed less than reference rotation velocity, then in step S110, determine engine shutdown, and the replacement timer, and restart this method.
As mentioned above, according to detecting the method that LPG switch connection signal transmssion line opens circuit, if when the connection signal of LPG switch inputs to ECU. motor was shut down in the reference time, and then ECU determines whether the operation of LPG switch is in normal state.But after past reference time, during normal engine operation, then ECU determines that the connection signal transmission line opens circuit.
According to detecting the method that LPG switch connection signal transmssion line opens circuit, whether the connection signal the transmission line whether operating switch that can determine LPG is in normal state or LPG switch opens circuit, thereby can prevent the excess exhaust gas discharging by connecting the open loop control of warning light and fuel.
Although the invention has been described in conjunction with an actual example embodiment, be appreciated that the present invention is not limited to disclosed embodiment.On the contrary, various spirit and improvement in the scope and the layouts of equal value that are included in hereinafter appended claim are contained in the present invention.

Claims (3)

1. one kind is used to detect and is installed in the method that is used on the vehicle to prevent that liquefied petroleum gas (LPG) switch connection signal transmssion line that fuel is carried from opening circuit, and comprising:
Begin described method;
When vehicle motor is in steady state operation, determine whether described liquefied petroleum air cock is operated;
When described liquefied petroleum gas (LPG) switching manipulation, after determining petrolift and being stopped by the fault diagnosis that lambda sensor carries out, whether ignition key closes;
When described ignition key was in " connection " state, whether function timer worked to detect described motor;
The time and the reference time of described timer are compared;
When time of described timer during, after determining the situation that the connection signal transmission line opens circuit, add " 1 " to the fault sense counter greater than the reference time; And
When within the predetermined time, when described fault sense counter added " 1 ", at the input fault code and after opening warning light, the described timer of resetting returned the beginning of described method then all the time.
2. method according to claim 1 also comprises when the liquefied petroleum air cock and not operating and ignition key when being in " closing " state, behind the described timer of resetting, returns the beginning with described method.
3. method according to claim 1 also comprises:
When time of described timer during, current rotating speed and reference rotation velocity are compared, thereby determine whether motor shuts down less than the reference time;
When described current rotating speed during, turn back to described definite liquefied petroleum air cock and whether operate greater than reference rotation velocity; And
When described current rotating speed during, behind the replacement timer, return the beginning of described method less than reference rotation velocity.
CNB2006100789145A 2005-08-30 2006-04-27 Method for detecting disconnection of an on signal-transmitting line of an LPG switch Expired - Fee Related CN100412342C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020050080173 2005-08-30
KR1020050080173A KR100716314B1 (en) 2005-08-30 2005-08-30 A method for detecting LPG switch line disconnection

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CN1924331A CN1924331A (en) 2007-03-07
CN100412342C true CN100412342C (en) 2008-08-20

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JP (1) JP4324602B2 (en)
KR (1) KR100716314B1 (en)
CN (1) CN100412342C (en)
AU (1) AU2006201753B2 (en)
IT (1) ITMI20060837A1 (en)
NL (1) NL1031695C2 (en)

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Publication number Priority date Publication date Assignee Title
CN101644199B (en) * 2009-09-02 2013-01-23 武汉理工大学 Method and device for simulating faults of zirconia-type oxygen sensor for electronic injection engine
US7769534B1 (en) * 2009-10-13 2010-08-03 Gm Global Technology Operations, Inc. Asymmetrical oxygen sensor diagnostic and degradation compensation systems
CN102390323B (en) * 2011-08-09 2013-11-06 联合汽车电子有限公司 Fault detection method for vehicle steering lamp
US9931956B2 (en) * 2015-12-30 2018-04-03 Thunder Power New Energy Vehicle Development Company Limited Battery management system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5247308A (en) * 1993-02-24 1993-09-21 The United States Of America As Represented By The Secretary Of The Army Detection and characterization of LPI signals
JPH11324749A (en) * 1998-05-08 1999-11-26 Aisan Ind Co Ltd Fuel supply control system for engine
KR20030031840A (en) * 2001-10-16 2003-04-23 아이상 고교 가부시키가이샤 Method of switching fuel in engine and apparatus thereof
JP2003217050A (en) * 2002-01-18 2003-07-31 Yazaki Corp Gas leakage alarm device
KR20040048126A (en) * 2002-12-02 2004-06-07 현대자동차주식회사 Starting control device of lpi engine and method thereof
KR20050026126A (en) * 2003-09-09 2005-03-15 현대자동차주식회사 Apparatus for engine start point indicate control on liquefied petroleum gas injection vehicle and method thereof

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004124710A (en) * 2002-09-30 2004-04-22 Nissan Diesel Motor Co Ltd Gas engine
KR100620416B1 (en) * 2004-03-04 2006-09-12 현대자동차주식회사 Fuel pump noise reducing apparatus in a LPI vehicle
KR100633402B1 (en) * 2004-03-17 2006-10-16 현대자동차주식회사 Self testing method of pump driver in LPI engine
KR100610074B1 (en) * 2004-04-29 2006-08-08 현대자동차주식회사 A system for diagnosis of LPI fuel pump
KR100610075B1 (en) * 2004-04-29 2006-08-08 현대자동차주식회사 A method for diagnosis of LPI fuel pump
KR100587867B1 (en) * 2004-10-20 2006-06-12 씨멘스 오토모티브 주식회사 apparatus and method For detecting error of Gasoline injection line of LPI car
KR100725698B1 (en) * 2006-02-22 2007-06-07 지멘스 오토모티브 주식회사 Method for detecting fuel shutdown valve of lpi car

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5247308A (en) * 1993-02-24 1993-09-21 The United States Of America As Represented By The Secretary Of The Army Detection and characterization of LPI signals
JPH11324749A (en) * 1998-05-08 1999-11-26 Aisan Ind Co Ltd Fuel supply control system for engine
KR20030031840A (en) * 2001-10-16 2003-04-23 아이상 고교 가부시키가이샤 Method of switching fuel in engine and apparatus thereof
JP2003217050A (en) * 2002-01-18 2003-07-31 Yazaki Corp Gas leakage alarm device
KR20040048126A (en) * 2002-12-02 2004-06-07 현대자동차주식회사 Starting control device of lpi engine and method thereof
KR20050026126A (en) * 2003-09-09 2005-03-15 현대자동차주식회사 Apparatus for engine start point indicate control on liquefied petroleum gas injection vehicle and method thereof

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JP4324602B2 (en) 2009-09-02
KR20070028665A (en) 2007-03-13
NL1031695C2 (en) 2008-09-29
JP2007064205A (en) 2007-03-15
CN1924331A (en) 2007-03-07
KR100716314B1 (en) 2007-05-11
NL1031695A1 (en) 2007-03-01
ITMI20060837A1 (en) 2007-02-28
AU2006201753A1 (en) 2007-03-15
AU2006201753B2 (en) 2008-02-14

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