CN100420844C - System for preventing fuel leakage for LPI injector - Google Patents

System for preventing fuel leakage for LPI injector Download PDF

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Publication number
CN100420844C
CN100420844C CNB2005101302599A CN200510130259A CN100420844C CN 100420844 C CN100420844 C CN 100420844C CN B2005101302599 A CNB2005101302599 A CN B2005101302599A CN 200510130259 A CN200510130259 A CN 200510130259A CN 100420844 C CN100420844 C CN 100420844C
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China
Prior art keywords
cut
solenoid valve
gas
sparger
electromagnetic valve
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Expired - Fee Related
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CNB2005101302599A
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CN1924339A (en
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朴正男
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Hyundai Motor Co
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Hyundai Motor Co
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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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

Disclosed is a system for preventing fuel leakage for LPI injector, in the system, when the engine is stopped and the cut solenoid valve is closed, the LPG gas can be discharged to the outside for collecting, then the leak of LPG gas through a nozzle tip of the injector can be prevented. The system for preventing fuel leakage for LPI injector according to the present invention includes: an exhaust nipple leading to the outside is connectedly installed long on a gas holding part for holding LPG gas when a cut solenoid valve is closed in the injector, and a cutoff solenoid valve to open and close an exhaust hose while being controlled by an electronic control unit (ECU) is installed on the exhaust hose connected to the exhaust nipple. A collecting means adsorbing and storing LPG gas discharged through the cutoff solenoid valve is arranged at the rear of the cutoff solenoid valve.

Description

The system that prevents fuel leak that is used for the LPI sparger
Technical field
The present invention relates to a kind of system that in LPI (liquefied petroleum injection) vehicle, when motor stops, preventing the nozzle tip leakage of fuel process sparger by cut-off electromagnetic valve, and more specifically, the system that prevents fuel leakage that relates to a kind of LPI of being used for sparger, in this system, stop and cut-off electromagnetic valve when being in dissengaged positions when motor, be filled in LPG (liquefied petroleum gas (LPG)) gaseous emission in the gas storage portion of cut-off electromagnetic valve inside to outside collecting, thereby preventing that the nozzle tip of LPG gas by sparger from producing leaks.
Background technique
Usually, the LPG motor is equipped with a kind of system, and by high-pressure bottle, promptly LPG jar supplied fuel offers motor after vaporizing by mixer and Carburetor in this system.
Yet, several problems below the system of this employing mixer and Carburetor exists.Be difficult to accurately control system by ECU (electric control device), therefore piloting engine in the winter time has difficulties.And, power performance and fuel consumption rate level are lower, and idle instability can take place and cause stopping suddenly of engine start owing to the user does not observe maintenance period instruction, and this be by be included in LPG fuel in the relevant problem of tar caused.
A kind of LPI motor of handling and addressing the above problem has been proposed.
Typically, liquefied petroleum injection (LPI) motor is meant a kind of engine system, petrolift is installed in LPG high-pressure bottle inside in this system, so that pumping and be transported to the Carburetor by the supply of fuel pipeline under pressure from the LPG high-pressure bottle, the LPG fuel of liquid phase vaporizes, the high pressure LPG fuel of vaporizing in Carburetor then is ejected in the motor by sparger, and this is only different by vapor tension release fuel with existing LPG motor.
That is to say that the LPI motor adopts the injection method identical with the gasoline vehicle, and LPG fuel is directly injected in the firing chamber of motor by injector nozzle.For such LPI motor, under the accurate control of ECU, LPG fuel is provided in the firing chamber and does not use mixer and Carburetor by sparger, make the starting performance in fuel consumption rate and power performance and winter be improved, simultaneously and the relevant long-standing problem of original LPG vehicle, for example unsafty maintenance period etc., problem also was solved.
Simultaneously, Fig. 1 shows according to prior art, is applied to the cross-sectional view of the structure of the conventional sparger in the LPI motor.
With reference to figure 1, in the bottom of sparger 10 inside cut-off electromagnetic valve 13 is installed, be used for when motor stops, preventing the LPG gas leakage.
Cut-off electromagnetic valve 13 is used for cutting off the LPG gas by in intake manifold and the surge tank introducing firing chamber when motor stops, thereby can prevent the discharge of large quantity of exhaust gas when motor is restarted, therefore can satisfy the regulation of present ultra-low emission vehicle (ULEV) regulation or higher standard.
In Fig. 1, reference character 11 expressions are used for fuel is joined the oil-feed port of sparger 10, and reference character 12 representatives are used for fuel is injected into the nozzle tip of motor.
Cut-off electromagnetic valve 13 comprises the plunger valve parts 14 of the fuel channel that is used to open and close sparger 10 inside and be used to control the electromagnetic coil 15 of plunger valve parts 14 when energising.
Yet as mentioned above, cut-off electromagnetic valve 13 plays when motor stops blocking-up LPG fuel and leaks into effect in the firing chamber from the nozzle tip 12 of sparger 10.Yet under the situation about in fact stopping after engine start, the temperature of sparger and cut-off electromagnetic valve portion raises suddenly, so the cut-off electromagnetic valve pressure inside also increases.The result just is difficult to keep tightness in the seat portion of cut-off electromagnetic valve, thereby causes gas to leak in the firing chamber of motor from the nozzle tip 12 of sparger 10.
This gas leakage has damaged the starting performance of motor and has helped the increase of waste gas.
In addition,, need very strong electric power and the necessary size that increases electromagnetic coil, can cause the inconvenience of installing like this in order to control cut-off electromagnetic valve.
Below table 1 when showing motor and stopping the pressure in the cut-off electromagnetic valve portion of sparger increase.
Table 1
Figure C20051013025900041
Summary of the invention
Therefore, the problems referred to above that the present invention is devoted to handle and solves in the prior art to be occurred, and the object of the present invention is to provide a kind of system that prevents fuel leak of the LPI of being used for sparger, in this system, stop and cut-off electromagnetic valve when being in dissengaged positions when motor, be filled in LPG gaseous emission in the gas storage portion of cut-off electromagnetic valve inside to outside collecting, thereby preventing that the nozzle tip of LPG gas by sparger from producing leaks.
In order to realize above purpose, according to the system that prevents fuel leak that the invention provides a kind of LPI of being used for sparger, comprise: vent connection, when the cut-off electromagnetic valve of injector interior is in dissengaged positions, be connected in the gas storage portion of storage LPG gas of cut-off electromagnetic valve inside extensiblely, be in communication with the outside by this way; Cut off solenoid valve, install on the other end of the exhaust hose that at one end is connected, be suitable for opening/closing exhaust hose under the control of electric control device (ECU) with the far-end of vent connection; And gathering-device, be connected to the rear portion that cuts off solenoid valve by flexible pipe, be suitable for absorbing and storing the LPG gas that process is cut off solenoid valve and discharged from cut off solenoid valve.
Preferably, electric control device can be controlled and cut off solenoid valve and close when engine operation, and opens in motor (starting off) time that begins to stop.
In addition, preferably, gathering-device can comprise that inside accommodates the tank arrangement of active carbon, this tank arrangement one side is formed with relief opening and opposite side is formed with and is connected to the removing side outlet of removing on the control electromagnetic valve, and the gas that will absorb and be stored in tank arrangement when engine operation, under the control of electric control device when being used for opening is incorporated in the gas handling system.
Description of drawings
By below in conjunction with the detailed description of accompanying drawing to the preferred embodiments of the present invention, above and other objects of the present invention, feature and advantage will be more obvious, wherein:
Fig. 1 shows according to prior art, is applied to the cross-sectional view of the structure of the conventional sparger in the LPI motor;
Fig. 2 is the structural representation that shows according to the system that prevents fuel leak of the present invention, as to be used for the LPI sparger.
Embodiment
Referring now to accompanying drawing to a preferred embodiment of the present invention will be described in detail.
The present invention relates to a kind ofly in the LPI vehicle, when motor stops, preventing that by cut-off electromagnetic valve fuel from passing through the system that the nozzle tip of sparger leaks, and more specifically, the system that prevents fuel leak that relates to a kind of LPI of being used for sparger, in this system, stop and cut-off electromagnetic valve when being in dissengaged positions when motor, be filled in LPG gaseous emission in the gas storage portion of cut-off electromagnetic valve inside to outside collecting, thereby preventing that the nozzle tip of LPG gas by sparger from producing leaks.
Fig. 2 is the structural representation that shows according to the system that prevents fuel leak of the present invention, as to be used for the LPI sparger.
Below with reference to Fig. 2 to a preferred embodiment of the present invention will be described in detail.
At first, when the cut-off electromagnetic valve 13 in sparger 10 inside is in dissengaged positions, be connected in the gas storage portion 16 of storage LPG gas of cut-off electromagnetic valve 13 inside with the vent connection 21 of external communications extensiblely.At this moment, an end of exhaust hose 22 is connected on the far-end of vent connection.
Separate the other end that the cut-out solenoid valve 23 that is provided with is installed in exhaust hose 22, gathering-device 24 is connected to the rear portion that cuts off solenoid valve 23 by flexible pipe.
The signal opening/closing that cut-out solenoid valve 23 is suitable for providing according to electric control device (ECU) 30 is so that exhaust hose 22 opening/closings.
Gathering-device 24 is suitable for attracting and stores through cut-out solenoid valve 23 and from cutting off the fuel that solenoid valve is discharged.Gathering-device 24 is not limited to the tank arrangement with any definite structure, but a kind of tank arrangement enough for gathering-device, it can store the fuel of some simultaneously and provide it to gas handling system.Adopt the example of known high power capacity catcher (HC trap) as gathering-device.
Simultaneously, a side of jars 24 is formed with the relief opening similar to the typical tank device 25, and its opposite side is formed with removes side outlet 24, is connected to by flexible pipe 27 and removes on the control electromagnetic valve (below be called " PCSV ") 28.
In addition, PCSV 28 is connected to the gas handling system of motor, promptly on the surge tank, so that the gas that will absorb and be stored in when opening in the jar 24 is introduced in the gas handling system.
At this, the signal opening/closing that provides according to electric control device (ECU) 30 is provided PCSV 28.
Next, will be described in detail operation of the present invention.
At first, under the control of electric control device 30, cut off solenoid valve 23 and in engine operation, close, and when motor stops, opening.
At this moment, electric control device 30 begins during starts at motor, promptly produces when engine start and closes the control signal of cutting off solenoid valve 23, and begin parking period at motor, promptly produces when motor stops and opening the control signal of cutting off solenoid valve 23.That is to say, cut off solenoid valve 23 under the control of electric control device 30, begin starting/beginning vehicle stop state and close according to motor.
By this mode, when motor stops when cutting off solenoid valve 23 when opening, the vent connection 21 of LPG gas by sparger 10 is discharged to and cuts off in the solenoid valve and enter into jars 24, then on jars 24 active carbon particle surfaces that the LPG gas absorption is contained therein and therein, with gas storage then by relief opening 25 with gaseous emission in atmosphere.
In addition, when cut-out solenoid valve 23 cut out, electric control device 30 control PCSV 28 opened, so that under the effect of intake negative-pressure, the gas that is stored in the jar 24 are introduced gas handling system together with ambient atmos, promptly in the surge tank when engine start.
As mentioned above, the fuel leak system that prevents according to the LPI of being used for sparger of the present invention, when motor stops, the LPG gas that leaks by vent connection the gas storage portion of the cut-off electromagnetic valve in sparger absorbs simultaneously and is stored in the gathering-device, is incorporated into when engine operation in the gas handling system of motor then.Therefore, can prevent that LPG gas nozzle tip by sparger from the gas storage portion of cut-off electromagnetic valve from leaking.
By above-mentioned apparent, the fuel leak system that prevents of the LPI of being used for sparger of the present invention has favourable effect, the i.e. LPG gas that when motor stops, from the gas storage portion of the cut-off electromagnetic valve of sparger, leaking by vent connection, side by side absorb and be stored in the gathering-device, when engine operation, enter into the gas handling system of motor then, thereby can prevent that LPG gas nozzle tip by sparger from the gas storage portion of cut-off electromagnetic valve from leaking, and can make the exhaust gas discharging amount reduce to minimum simultaneously in the early stage of engine start.
And,,, promptly must increase the size of electromagnetic coil in order to operate cut-off electromagnetic valve so can thoroughly solve the problem that exists in the conventional art because the present invention can reduce the pressure in the gas storage portion of the cut-off electromagnetic valve in the sparger automatically.
Though invention has been described with reference to the embodiment of specific description, the present invention is not limited to described embodiment but is only limited by claim.Be appreciated that those skilled in the art can change or revises embodiment, and do not depart from the scope and spirit of the present invention.

Claims (2)

1. system that prevents fuel leak that is used for the liquefied petroleum injection sparger comprises:
Vent connection when the cut-off electromagnetic valve of injector interior is in dissengaged positions, is connected in the gas storage portion of sparger of storage liquid liquefied oil gas of cut-off electromagnetic valve inside, in this way with external communications extensiblely;
Cut off solenoid valve, install on the other end of the exhaust hose that at one end is connected, be suitable for opening/closing exhaust hose under the control of electric control device with the far-end of described vent connection; And
Gathering-device is connected to the rear portion of described cut-out solenoid valve by flexible pipe, and be suitable for absorbing and store liquefied petroleum gas (LPG) by cutting off solenoid valve and from cut off solenoid valve, discharging,
Wherein said electric control device control is cut off solenoid valve and is closed when engine operation, and opens when motor begins to stop.
2. the system as claimed in claim 1, wherein said gathering-device comprises jar, include active carbon in described jar, and a side of described jar is formed with relief opening, and described jar opposite side is formed with the removing side outlet that is connected on the removing control electromagnetic valve, when being used for when engine operation, under the control of described electric control device, opening, the gas that absorbs and be stored in described jar is introduced in the gas handling system.
CNB2005101302599A 2005-08-30 2005-12-12 System for preventing fuel leakage for LPI injector Expired - Fee Related CN100420844C (en)

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KR1020050080013A KR100656022B1 (en) 2005-08-30 2005-08-30 System for preventing fuel leak of lpi injector
KR1020050080013 2005-08-30
KR10-2005-0080013 2005-08-30

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CN100420844C true CN100420844C (en) 2008-09-24

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KR (1) KR100656022B1 (en)
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AU (1) AU2006201763B2 (en)
IT (1) ITMI20060793A1 (en)
NL (1) NL1031660C2 (en)

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Publication number Priority date Publication date Assignee Title
KR100785122B1 (en) * 2006-10-11 2007-12-11 현대자동차주식회사 Injector combined with liquefied petroleum injection cut-sol
KR100793999B1 (en) * 2006-10-26 2008-01-10 현대자동차주식회사 Injector optimized construction combined with liquefied petroleum injection cut-sol
JP4978559B2 (en) * 2008-05-20 2012-07-18 トヨタ自動車株式会社 Gas circulation engine

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KR20040041421A (en) * 2002-11-11 2004-05-17 현대자동차주식회사 Lpi system for protecting injector leakage
KR20040069605A (en) * 2003-01-30 2004-08-06 현대자동차주식회사 Fuel leak control device of lpi engine
KR20040087653A (en) * 2003-04-07 2004-10-15 현대자동차주식회사 Method of decreasing starting delay and hc for lpi vehicle
KR20040107684A (en) * 2003-06-09 2004-12-23 현대자동차주식회사 apparatus for protecting fuel return noise in bombe of liquefied petroleum gas injection vehicles
KR20040107683A (en) * 2003-06-09 2004-12-23 현대자동차주식회사 apparatus for removing vaporized fuel in injector of liquefied petroleum gas injection engine

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JP3431758B2 (en) * 1996-05-27 2003-07-28 愛三工業株式会社 Fuel emission prevention device for gaseous fuel engine
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KR20030016792A (en) * 2001-08-22 2003-03-03 주식회사 현대오토넷 A leakage prevention device of LPG and control method thereof
KR100444383B1 (en) * 2001-11-22 2004-08-16 (주)모토닉 Fuel leak prevention system for LPGvehicles and control method thereof
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Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040041421A (en) * 2002-11-11 2004-05-17 현대자동차주식회사 Lpi system for protecting injector leakage
KR20040069605A (en) * 2003-01-30 2004-08-06 현대자동차주식회사 Fuel leak control device of lpi engine
KR20040087653A (en) * 2003-04-07 2004-10-15 현대자동차주식회사 Method of decreasing starting delay and hc for lpi vehicle
KR20040107684A (en) * 2003-06-09 2004-12-23 현대자동차주식회사 apparatus for protecting fuel return noise in bombe of liquefied petroleum gas injection vehicles
KR20040107683A (en) * 2003-06-09 2004-12-23 현대자동차주식회사 apparatus for removing vaporized fuel in injector of liquefied petroleum gas injection engine

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AU2006201763A1 (en) 2007-03-15
KR100656022B1 (en) 2006-12-08
CN1924339A (en) 2007-03-07
NL1031660A1 (en) 2007-03-01
AU2006201763B2 (en) 2007-12-13
NL1031660C2 (en) 2011-01-25
ITMI20060793A1 (en) 2007-02-28
JP2007064197A (en) 2007-03-15

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