CN101054925A - Fuel supply system of LPI engine and method for forcibly returning fuel thereby - Google Patents
Fuel supply system of LPI engine and method for forcibly returning fuel thereby Download PDFInfo
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- CN101054925A CN101054925A CNA2006100769122A CN200610076912A CN101054925A CN 101054925 A CN101054925 A CN 101054925A CN A2006100769122 A CNA2006100769122 A CN A2006100769122A CN 200610076912 A CN200610076912 A CN 200610076912A CN 101054925 A CN101054925 A CN 101054925A
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- fuel
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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
- F02M21/0245—High pressure fuel supply systems; Rails; Pumps; Arrangement of valves
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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
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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
- F02D19/02—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
-
- 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
- F02D19/021—Control of components of the fuel supply system
- F02D19/022—Control of components of the fuel supply system to adjust the fuel pressure, temperature or composition
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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
- F02D19/02—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
- F02D19/026—Measuring or estimating parameters related to the fuel supply system
- F02D19/027—Determining the fuel pressure, temperature or volume flow, the fuel tank fill level or a valve position
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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
- F02M21/0203—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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/20—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines characterised by means for preventing vapour lock
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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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- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The invention involves in a fuel supply system of LPI engine and method for forcibly returning fuel thereby having an advantage of preventing fuel leakage caused by a temperature and pressure rise of the remaining fuel in a fuel supply line and a fuel return line when an ignition switch turns off. The present invention includes a bombe filled with the fuel, an engine compartment for burning the fuel, a fuel supply line for supplying the fuel, and a fuel return line for returning remaining fuel to the bombe after combustion, wherein the bombe has a fuel return pump for returning the remaining fuel in the fuel supply line and the fuel return line to the bombe when an engine stops.
Description
The cross-reference of related application
The application requires preference and the rights and interests to the korean patent application No.10-2006-0033083 of Korea S Department of Intellectual Property application on April 12nd, 2006, and the full content of above-mentioned application is incorporated into this with for referencial use.
Technical field
The present invention relates to the fuel system of LPI motor and force to return the method for fuel thus.Especially, the present invention relates to the fuel system of such LPI motor and force to return the method for fuel thus, its advantage that has is that the temperature and pressure of the residual fuel in supply of fuel pipeline and the fuel return pipeline when preventing that ignition switch from disconnecting raises and causes fuel leak.
Background technique
Usually, the LPI motor refers to petrolift and is installed in motor in the storage bottle (bombe), and by to the liquid LPG fuel of sparger supply, LPG fuel is injected in the motor by sparger.The LPI motor can satisfy exhaust to be regulated, and can solve the variety of issue of traditional LPG system, for example bad startup in winter and the degeneration of output power.
As shown in Figure 6, traditional LPI fuel system comprises the storage bottle 10 that has to the petrolift 12 of engine compartment 20 supply liquefied fuels, one end is connected to petrolift 12 and the other end and is connected to the supply of fuel pipeline 30 of engine compartment 20 and an end and is connected to the fuel return pipeline 40 that engine compartment 20 and the other end are connected to storage bottle 10.
So, one after the other be transported from petrolift 12 supplied fuel, and be injected into the firing chamber by supply of fuel pipeline 30 and sparger.Then, residual fuel turns back to storage bottle 10 by fuel return pipeline 40.
Therebetween, supply of fuel pipeline 30 has the stop valve 32 of when motor stops fuel shutoff supply and is used to measure the temperature transducer 34 of fuel temperature.
In addition, fuel return pipeline 40 has the pressure transducer 49 that is used to measure fuel pressure and is used for fuel pressure is remained on pressure regulator 48 in the prespecified range.
According to traditional fuel system, fuel may be retained near in the supply of fuel pipeline and fuel return pipeline of sparger when motor stops, and residual fuel may leak into the firing chamber when motor is cooled to room temperature.
Such fuel leak meeting causes the fuel concentration in the cylinder dense, many problems can take place make startup be delayed and the increase of HC air displacement.
In the disclosed above information of background technique part just to the understanding that strengthens background technique of the present invention, so it may comprise and not be formed on this state and be the information of the prior art known to the ordinary skill of related domain already.
Summary of the invention
The present invention attempts to provide a kind of fuel system of LPI motor and the method that fuel is returned in pressure thereof, and its advantage that has is by returning the rising that residual fuel in supply of fuel pipeline and the fuel return pipeline prevents motor fuel pressure.
In addition, the present invention has and prevents the advantage of fuel by injector leakage, regulates thereby satisfy the exhaust that strengthens.
The typical fuel supply system that is used for the LPI motor according to embodiments of the invention comprises: storage bottle (bombe), and it has the petrolift that is used for fuel supplying and the fuel that is used to force to return fuel returned pump; Engine compartment, it has a plurality of spargers that inject fuel; The supply of fuel pipeline, the one end is connected to petrolift and the other end is connected to engine compartment, and this supply of fuel pipeline has stop valve and temperature transducer; With the fuel return pipeline, the one end is connected to engine compartment and the other end and is branched into and forces return pipeline and normal return pipeline so that residual fuel is returned storage bottle, this fuel return pipeline has pressure transducer and pressure regulator, and the fuel of wherein forcing return pipeline to be connected to storage bottle returns pump.
Normal return pipeline can have stop valve, thereby cuts off normal return pipeline when fuel is forced to return.
Fuel returns pump and comprises: pump case; Motor, it is used for supplying energy with running shaft and pump fuel, and this motor is installed in the top of pump case; Axis cam, it is installed in the lower end of the axle of motor, and this axis cam rotates together with the axis; Plunger, it is used for rotatablely moving of axle is converted to reciprocating linear motion, and this plunger externally is connected to axis cam; With the diaphragm that is used for pump fuel, this diaphragm and plunger interlocking.
Be used for the upper end that fuel draining pipe that the lubricant oil supply tube of supplying lubricating oil and the fuel that is used for returning enters storage bottle can be connected to pump case.
Lubricant oil path around axle can be vertically formed middle part in motor, and is used for the whelk bolt that lubricant oil upwards promotes can be installed in the bottom of the outer periphery of axle, makes lubricant oil be pushed upwardly the upper end of motor and is disperseed.
The typical fuel supply system that is used for the LPI motor according to a second embodiment of the present invention comprises: storage bottle, and it has the petrolift that is used for fuel supplying and the fuel that is used to force to return fuel returned pump; Engine compartment, it has a plurality of spargers that inject fuel; The supply of fuel pipeline, the one end is connected to petrolift and the other end is connected to engine compartment, and this supply of fuel pipeline has stop valve and temperature transducer; With the fuel return pipeline, the one end is connected to engine compartment and the other end and is branched into and forces return pipeline and normal return pipeline so that residual fuel is returned storage bottle, this fuel return pipeline has pressure transducer and pressure regulator, the fuel of wherein forcing return pipeline to be connected to storage bottle returns pump and has stop valve, thereby opens the pressure return pipeline by opening stop valve when fuel is forced to return.
Fuel returns pump and comprises: pump case; Motor, it is used for supplying energy with running shaft and pump fuel, and this motor is installed in the top of pump case; Axis cam, it is installed in the lower end of the axle of motor, and this axis cam rotates together with the axis; Plunger, it is used for rotatablely moving of axle is converted to reciprocating linear motion, and this plunger externally is connected to axis cam; With the diaphragm that is used for pump fuel, this diaphragm and plunger interlocking.
Be used for the upper end that fuel draining pipe that the lubricant oil supply tube of supplying lubricating oil and the fuel that is used for returning enters storage bottle can be connected to pump case.
Lubricant oil path around axle can be vertically formed middle part in motor, and is used for the whelk bolt that lubricant oil upwards promotes can be installed in the bottom of the outer periphery of axle, makes lubricant oil be enhanced the upper end of motor and is disperseed.
Being used for of a third embodiment in accordance with the invention forces to return the supply of fuel pipeline that is retained in the LPI motor and the typical method of the fuel in the fuel return pipeline comprises: determine whether ignition switch is connected; If ignition switch is connected then is connected main relay and petrolift relay; Return fuel by normal return pipeline; Determine whether ignition switch disconnects; Comparison engine fuel pressure and reference pressure if ignition switch is opened; If motor fuel pressure is greater than reference pressure then force to return fuel by the operation that stop valve and fuel return pump; With disconnection main relay and petrolift relay.
The step of returning fuel by normal return pipeline comprises opening normal return pipeline and keeping fuel to return pump by opening installation stop valve thereon closes.
Returning the step that the operation of pump forces to return fuel by stop valve and fuel comprises: cut off normal return pipeline by closing stop valve mounted thereto; Return pump by connection fuel and force to return fuel; Comparison engine fuel pressure and reference pressure; If with motor fuel pressure less than reference pressure then open stop valve and disconnect fuel and return pump.
Open and close normal return pipeline and force the controlling method of return pipeline except forcing return pipeline to have stop valve and the operation by stop valve, the typical method that being used for of a fourth embodiment in accordance with the invention forces to return the fuel in the supply of fuel pipeline that is retained in the LPI motor and the fuel return pipeline is identical with the 3rd embodiment.Thereby, the difference with the 3rd embodiment will only be described hereinafter.
A fourth embodiment in accordance with the invention be used for force to return in the method for the supply of fuel pipeline that is retained in the LPI motor and the fuel in the fuel return pipeline, the step of returning fuel by normal return pipeline comprises by closing stop valve mounted thereto to be cut off and forces return pipeline and keep fuel to return pump to close.
In addition, returning the step that the operation of pump forces to return fuel by stop valve and fuel comprises: open the pressure return pipeline by opening installation stop valve thereon; Return pump by connection fuel and force to return fuel; Comparison engine fuel pressure and reference pressure; If with motor fuel pressure less than reference pressure then close stop valve and disconnect fuel and return pump.
Description of drawings
Fig. 1 is the schematic representation of the fuel system of LPI motor according to an exemplary embodiment of the present invention.
Fig. 2 is the cross-sectional view that the fuel of the fuel system that is used for the LPI motor according to an exemplary embodiment of the present invention returns pump.
Fig. 3 is the cross-sectional view that returns pump according to the fuel of the fuel system that is used for the LPI motor of another exemplary embodiments of the present invention.
Fig. 4 is the flow chart of method of fuel that is used to force to return the LPI motor according to an exemplary embodiment of the present invention.
Fig. 5 is the flow chart of method of fuel that is used to force to return the LPI motor according to another exemplary embodiments of the present invention.
Fig. 6 is the schematic representation of the fuel system of traditional LPI motor.
Embodiment
Hereinafter the exemplary embodiments of the fuel system of LPI motor of the present invention will be described with reference to the drawings specifically.
Fig. 1 is the schematic representation of the fuel system of LPI motor according to an exemplary embodiment of the present invention.
As shown in fig. 1, the typical fuel supply system of LPI motor comprises the storage bottle 10 that is full of fuel according to an embodiment of the invention, the engine compartment 20 that fuel burns therein, fuel is supplied to the supply of fuel pipeline 30 of engine compartment 20 and the fuel return pipeline 40 that the residual fuel after the burning is returned to storage bottle 10 therein therein.
Petrolift 12 and fuel return pump 14 and are installed in the storage bottle 10.Petrolift 12 pump fuel are so that supply fuel to engine compartment 20.Fuel returns pump 14 residual fuel in supply of fuel pipeline 30 and the fuel return pipeline 40 is turned back in the storage bottle 10 when motor stops.
As shown in Figure 2, fuel returns pump 14 and comprises pump case 52, is used for supplying energy so that force to return the motor 50 of fuel, is installed in the axis cam 54 on the axle 64 of motor 50, externally be connected to axis cam 54 plunger 56 and with the diaphragm 58 of plunger 56 interlockings.
Motor 50 is installed in the top of pump case 52.Axle 64 is installed in the motor 50.Axle 64 rotations and supplying energy are with pump fuel.
Therebetween, the lubricant oil path 68 around axle 64 is vertically formed in the middle part of motor 50.Be used for the whelk bolt 66 that lubricant oil upwards promotes is installed in the bottom of the outer periphery of axle 64.Be installed in axle on 64 66 rotations of whelk bolt and lubricant oil upwards promoted, thereby lubricant oil is disperseed.Then, the lubricant oil of dispersion flows through the outer periphery of motor 50 with cooling and lubricated motor 50.After this, lubricant oil descends and circulation.In addition, lubricant oil supply tube 60 is connected to lubricant oil path 68 with supplying lubricating oil.
Axis cam 54 is installed in axle 64 the lower end of motor 50 and prejudicially with axle 64 rotations.
Supply of fuel pipeline 30 is connected to petrolift 12 sparger of engine compartment 20 arriving sparger from the supply of fuel of storage bottle 10.Stop valve 32 and temperature transducer 34 are installed on the supply of fuel pipeline 30.The fuel that is fed to engine compartment 20 when motor stops to be cut off valve 32 and to cut off, and fuel temperature is measured by temperature transducer 34.Control supply of fuel of based on fuel temperature and power operation.
Being used for that the end that residual fuel returns the fuel return pipeline 40 of storage bottle 10 is connected to engine compartment 20 and the other end is branched into and forces return pipeline 42 and normal return pipeline 44.The fuel of forcing return pipeline 42 to be connected to storage bottle 10 returns pump 14.Residual fuel when motor stops in supply of fuel pipeline 30 and the fuel return pipeline 40 is forced to turn back to storage bottle 10 by forcing return pipeline 42.In addition, when engine operation in combustion process still the residual fuel of unburned be returned to storage bottle 10 by normal return pipeline 44, rather than return the operation of pump 14 by fuel.
In addition, as shown in Figure 2, normal return pipeline 44 has stop valve 46.When engine operation, stop valve 46 is opened and residual fuel turns back to storage bottle 10 by normal return pipeline 44.Yet, under the situation that causes the residual fuel in supply of fuel pipeline 30 and the fuel return pipeline 40 to be forced to return when motor stops owing to motor fuel pressure greater than predetermined pressure, the stop valve 46 on the normal return pipeline 44 is closed and residual fuel is returned to storage bottle 10 by forcing return pipeline 42.
Therebetween, as shown in Figure 3, stop valve 46 can be installed in to be forced on the return pipeline 42.In this case, stop valve 46 is closed and residual fuel turns back to storage bottle 10 by normal return pipeline 44 when engine operation.Yet, under the situation that when motor stops, causing the residual fuel in supply of fuel pipeline 30 and the fuel return pipeline 40 to be forced to return greater than predetermined pressure, force stop valve 46 on the return pipeline 42 to be opened and residual fuel is returned to storage bottle 10 by forcing return pipeline 42 owing to motor fuel pressure.
Therebetween, the typical fuel supply system of LPI motor is controlled by the electrical signal of ECU (not shown) according to an embodiment of the invention.Such controlling method is conspicuous for the person of ordinary skill of the art, therefore will no longer describe in further detail.
With reference to the accompanying drawings, the typical method that is used to according to an embodiment of the invention to force to return the fuel of LPI motor will be described in more detail below.
As shown in Figures 4 and 5, the typical method that is used to according to an embodiment of the invention to force to return the fuel of LPI motor starts from determining at step S100 whether ignition switch is connected.If ignition switch is connected, then connect main relay and petrolift relay at step S110ECU.Step S120 and S120 ' during when the motor proper functioning fuel be returned by normal return pipeline 44.
After this, determine at step S130ECU whether ignition switch disconnects, if ignition switch is connected, then fuel continues to return by normal return pipeline 44.If ignition switch disconnects, then at step S140ECU comparison engine fuel pressure and predetermined reference pressure.
In this case, if motor fuel pressure greater than reference pressure, is then forced to return by the operation that stop valve 46 and fuel return pump 14 at step S150 and S150 ' fuel.If motor fuel pressure is less than reference pressure, then fuel is not forced to return.
At last, be disconnected, and motor keeps stopping at step S160 main relay and petrolift relay.
Therebetween, return the step S120 of fuel and S120 ' and force to return the step S150 of fuel and S150 ' will be installed on the normal return pipeline 44 at stop valve 46 hereinafter and stop valve 46 is installed in the different situations of forcing on the return pipeline 42 and is described in detail by normal return pipeline 44 by the operation that fuel returns pump 14.
As shown in Figure 4, if stop valve 46 is installed on the normal return pipeline 44, at the step S120 that returns fuel by normal return pipeline 44, stop valve 46 stays open to open normal return pipeline 44.Then, fuel returns that pump 14 keeps disconnecting and residual fuel turns back to storage bottle 10 by normal return pipeline 44.
In addition, force to return the step S150 of fuel in the operation of returning pump 14 by fuel, the stop valve 46 that is installed on the normal return pipeline 44 at step S210 is closed to cut off normal return pipeline 44, returns pump 14 at step S220 fuel and is switched on so that fuel is forced to return storage bottle 10.
After this, compare with reference pressure once more at step S230 motor fuel pressure.If motor fuel pressure is greater than reference pressure, then fuel is forced to return by the operation that fuel returns pump 14.If motor fuel pressure is less than reference pressure, then is opened and fuel returns pump 14 and is disconnected, thereby do not force to return fuel at step S240 stop valve 46.
Yet, as shown in Figure 5,, forces on the return pipeline 42 by stop valve 46 if being installed in, and at the step S120 ' that returns fuel by normal return pipeline 44, be installed in the stop valve of forcing on the return pipeline 42 46 and be closed to cut off pressure return pipeline 42.Then, fuel returns pump 14 maintenance disconnections.
In addition, force to return the step S150 ' of fuel in the operation of returning pump 14 by fuel, be installed in the stop valve of forcing on the return pipeline 42 46 at step S210 ' and be opened, return pump 14 at step S220 ' fuel and be switched on so that fuel is forced to return storage bottle 10 to open pressure return pipeline 42.
After this, compare with reference pressure once more at step S230 ' motor fuel pressure.If motor fuel pressure is greater than reference pressure, then fuel is forced to return by the operation that fuel returns pump 14.If motor fuel pressure is less than reference pressure, then is disconnected and fuel returns pump 14 and is disconnected, thereby do not force to return fuel at step S240 ' stop valve 46.
Although the present invention is considered to feasible exemplary embodiments and is described in conjunction with current, be to be understood that the present invention is not limited to the disclosed embodiments, but opposite, want to contain various improvement and equivalent arrangements in the spirit and scope that are included in appended claim.
As mentioned above, according to the present invention, the residual fuel when motor stops in supply of fuel pipeline and the fuel return pipeline is returned.So, prevented the fuel pressure rising.
In addition, according to the present invention, prevented that fuel pressure from raising and the fuel leak that causes.The problem that startup is delayed and the HC air displacement increases is also solved.
Claims (11)
1. fuel system that is used for the LPI motor comprises:
Storage bottle, it has the petrolift that is used for fuel supplying and the fuel that is used to force to return fuel returned pump;
Engine compartment, it has a plurality of spargers that inject fuel;
The supply of fuel pipeline, the one end is connected to petrolift and the other end is connected to engine compartment, and this supply of fuel pipeline has stop valve and temperature transducer; With
Fuel return pipeline, one end are connected to engine compartment and the other end is branched into pressure return pipeline and normal return pipeline, and so that residual fuel is returned storage bottle, this fuel return pipeline has pressure transducer and pressure regulator,
Wherein this pressure return pipeline fuel of being connected to storage bottle returns pump.
2. according to the fuel system of claim 1, wherein said normal return pipeline has stop valve, thereby cuts off normal return pipeline when fuel is forced to return.
3. according to the fuel system of claim 1, wherein said pressure return pipeline has stop valve, thereby opens the pressure return pipeline by opening stop valve when fuel is forced to return.
4. according to the fuel system of claim 2 or 3, wherein said fuel returns pump and comprises:
Pump case;
Motor, it is used for supplying energy with running shaft and pump fuel, and this motor is installed in the top of pump case;
Axis cam, it is installed in the lower end of the axle of motor, and this axis cam rotates together with the axis;
Plunger, it is used for rotatablely moving of axle is converted to reciprocating linear motion, and this plunger externally is connected to axis cam; With
The diaphragm that is used for pump fuel, this diaphragm and plunger interlocking.
5. according to the fuel system of claim 4, the fuel draining pipe that the fuel that wherein is used for the lubricant oil supply tube of supplying lubricating oil and is used for returning enters storage bottle is connected to the upper end of pump case.
6. according to the fuel system of claim 5, wherein be vertically formed around the lubricant oil path of axle at the middle part of motor, and be used for the whelk bolt that lubricant oil upwards promotes is installed in the bottom of the outer periphery of axle, make lubricant oil be pushed upwardly the upper end of motor and disperseed.
7. one kind is used for forcing to return the supply of fuel pipeline that is retained in the LPI motor and the method for the fuel in the fuel return pipeline, comprising:
Determine whether ignition switch is connected;
If ignition switch is connected then is connected main relay and petrolift relay;
Return fuel by normal return pipeline;
Determine whether ignition switch disconnects;
Comparison engine fuel pressure and reference pressure if ignition switch disconnects;
If motor fuel pressure is greater than reference pressure then force to return fuel by the operation that stop valve and fuel return pump; With
Disconnect main relay and petrolift relay.
8. according to the method for claim 7, wherein the step of returning fuel by normal return pipeline comprises:
Open normal return pipeline by opening installation stop valve thereon; With
Keeping fuel to return pump disconnects.
9. method according to Claim 8, wherein return the step that the operation of pump forces to return fuel and comprise by stop valve and fuel:
Cut off normal return pipeline by closing stop valve mounted thereto;
Return pump by connection fuel and force to return fuel;
Comparison engine fuel pressure and reference pressure; With
If motor fuel pressure is less than reference pressure then open stop valve and disconnect fuel and return pump.
10. according to the method for claim 7, wherein the step of returning fuel by normal return pipeline comprises:
Cut off the pressure return pipeline by closing stop valve mounted thereto; With
Keeping fuel to return pump disconnects.
11., wherein return the step that the operation of pump forces to return fuel and comprise by stop valve and fuel according to the method for claim 10:
Open the pressure return pipeline by opening installation stop valve thereon;
Return pump by connection fuel and force to return fuel;
Comparison engine fuel pressure and reference pressure; With
If motor fuel pressure is less than reference pressure then close stop valve and disconnect fuel and return pump.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020060033083A KR100802930B1 (en) | 2006-04-12 | 2006-04-12 | Fuel supply system and method for forcibly returning fuel of lpi engine |
| KR1020060033083 | 2006-04-12 | ||
| KR10-2006-0033083 | 2006-04-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101054925A true CN101054925A (en) | 2007-10-17 |
| CN101054925B CN101054925B (en) | 2010-07-14 |
Family
ID=38658006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100769122A Expired - Fee Related CN101054925B (en) | 2006-04-12 | 2006-04-25 | Method for forcibly returning fuel in LPI engine pipeline |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP4324601B2 (en) |
| KR (1) | KR100802930B1 (en) |
| CN (1) | CN101054925B (en) |
| AU (1) | AU2006201760B2 (en) |
| IT (1) | ITMI20060791A1 (en) |
| NL (1) | NL1031682C2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101994603A (en) * | 2009-08-26 | 2011-03-30 | 现代自动车株式会社 | Fuel supplying system of LPI engine |
| CN101435394B (en) * | 2007-11-14 | 2012-07-25 | 现代自动车株式会社 | Device for preventing loss of lubricant in LPI pump |
| CN101559770B (en) * | 2008-04-14 | 2013-08-28 | 现代自动车株式会社 | Control method for fuel pump of an LPI hybrid vehicle |
| CN109210364A (en) * | 2017-06-30 | 2019-01-15 | 罗伯特·博世有限公司 | Storage bin for cryogenic media |
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| KR101360464B1 (en) * | 2008-08-25 | 2014-02-07 | 현대자동차주식회사 | Fuel system with preventing device of leaking fuel |
| NL2003791C2 (en) | 2009-11-12 | 2011-05-16 | Vialle Alternative Fuel Systems Bv | FUEL FEED SYSTEM AND HIGH PRESSURE PUMP FOR A COMBUSTION ENGINE. |
| KR101251048B1 (en) * | 2010-12-06 | 2013-04-05 | 기아자동차주식회사 | Liquefied-Petroleum-Injection System for vehicle |
| KR102159285B1 (en) * | 2014-08-21 | 2020-09-23 | 두산인프라코어 주식회사 | Apparatus and method for controlling a common rail system |
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| DE19611434B4 (en) * | 1995-05-31 | 2004-02-26 | AVL Gesellschaft für Verbrennungskraftmaschinen und Meßtechnik m.b.H. Prof. Dr. Dr.h.c. Hans List | Injection system for an internal combustion engine |
| JPH10227263A (en) | 1997-02-14 | 1998-08-25 | Kubota Corp | Fuel supply device of engine |
| FR2791093B1 (en) * | 1999-03-18 | 2001-05-04 | Inst Francais Du Petrole | PRESSURE LIQUID FUEL SUPPLY SYSTEM FOR AN INTERNAL COMBUSTION ENGINE |
| US6453877B1 (en) * | 2000-11-28 | 2002-09-24 | Outboard Marine Corporation | Fuel delivery system using two pressure regulators with a single electric fuel pump |
| KR100437084B1 (en) * | 2001-03-30 | 2004-06-23 | (주)모토닉 | Fuel supply apparatus of gas fuel automobile |
| KR100475803B1 (en) * | 2001-10-16 | 2005-03-10 | 현대자동차주식회사 | Remaining fuel collecting system |
| DE10212870A1 (en) * | 2002-03-22 | 2003-10-02 | Volkswagen Ag | Fuel supply system of IC engine with high pressure injection has valve fitted in HP pump leakage pipe |
| JP2003328858A (en) * | 2002-05-13 | 2003-11-19 | Nikki Co Ltd | Lpg injection supply device for engine |
| KR100534976B1 (en) * | 2002-09-13 | 2005-12-08 | 현대자동차주식회사 | a remove device and the method for the fuel gas leftover in LPG engine |
| KR20040054881A (en) * | 2002-12-18 | 2004-06-26 | 현대자동차주식회사 | fuel feeding system for an LPI engine |
| JP2005090232A (en) * | 2003-09-12 | 2005-04-07 | Hitachi Unisia Automotive Ltd | Fuel supply device of internal combustion engine |
| KR100692071B1 (en) * | 2004-10-08 | 2007-03-12 | 현대자동차주식회사 | Fuel system of the LPI engine |
| KR100516852B1 (en) | 2005-02-01 | 2005-09-23 | 주식회사 이원 | Leakage fuel recirculation device of lpli engine |
-
2006
- 2006-04-12 KR KR1020060033083A patent/KR100802930B1/en active IP Right Grant
- 2006-04-21 IT IT000791A patent/ITMI20060791A1/en unknown
- 2006-04-24 JP JP2006118747A patent/JP4324601B2/en not_active Expired - Fee Related
- 2006-04-25 CN CN2006100769122A patent/CN101054925B/en not_active Expired - Fee Related
- 2006-04-25 NL NL1031682A patent/NL1031682C2/en not_active IP Right Cessation
- 2006-04-27 AU AU2006201760A patent/AU2006201760B2/en not_active Ceased
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101435394B (en) * | 2007-11-14 | 2012-07-25 | 现代自动车株式会社 | Device for preventing loss of lubricant in LPI pump |
| CN101559770B (en) * | 2008-04-14 | 2013-08-28 | 现代自动车株式会社 | Control method for fuel pump of an LPI hybrid vehicle |
| CN101994603A (en) * | 2009-08-26 | 2011-03-30 | 现代自动车株式会社 | Fuel supplying system of LPI engine |
| CN109210364A (en) * | 2017-06-30 | 2019-01-15 | 罗伯特·博世有限公司 | Storage bin for cryogenic media |
Also Published As
| Publication number | Publication date |
|---|---|
| NL1031682A1 (en) | 2007-10-15 |
| AU2006201760B2 (en) | 2008-06-26 |
| KR20070101687A (en) | 2007-10-17 |
| ITMI20060791A1 (en) | 2007-10-13 |
| NL1031682C2 (en) | 2009-01-27 |
| JP4324601B2 (en) | 2009-09-02 |
| CN101054925B (en) | 2010-07-14 |
| KR100802930B1 (en) | 2008-02-14 |
| AU2006201760A1 (en) | 2007-11-01 |
| JP2007285285A (en) | 2007-11-01 |
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