CN102472203B - Method for starting DME engine - Google Patents
Method for starting DME engine Download PDFInfo
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- CN102472203B CN102472203B CN201080032642XA CN201080032642A CN102472203B CN 102472203 B CN102472203 B CN 102472203B CN 201080032642X A CN201080032642X A CN 201080032642XA CN 201080032642 A CN201080032642 A CN 201080032642A CN 102472203 B CN102472203 B CN 102472203B
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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
- F02M21/08—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for non-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
- 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
- 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
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
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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
- F02D41/003—Adding fuel vapours, e.g. drawn from engine fuel reservoir
- F02D41/0032—Controlling the purging of the canister as a function of the engine operating conditions
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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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
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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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
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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
- 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
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0287—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers characterised by the transition from liquid to gaseous phase ; Injection in liquid phase; Cooling and low temperature storage
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0803—Circuits or control means specially adapted for starting of engines characterised by means for initiating engine start or stop
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0606—Fuel temperature
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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
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/20—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for cooling
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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
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- 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)
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
- Fuel-Injection Apparatus (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
A method for starting a DME engine is provided with a cooler starting step at which fuel coolers (51, 52) for cooling a fuel in a supply line (10) and a return line (20) are operated; a line opening step at which the supply line (10) is opened; a pump starting step at which a high pressure pump (4) is operated after the line opening step; a purge step at which the supply line (10) is opened to the atmosphere after the pump starting step until a pressure difference between a third pressure sensor (PS-3) and a second pressure sensor (PS-2) is above a predetermined pressure difference and the pressure at a forth pressure sensor (PS-4) is above a predetermined pressure; a temperature drop waiting step at which the process waits until the temperature of the fuel detected by a fourth temperature sensor (64) is lower than a predetermined temperature, after the cooler starting step; and a starter operating step at which a starter for the engine (2) is operated after the completion of the purge step and the temperature drop waiting step.
Description
Technical field
The present invention relates to the starting method of the DME motor in a kind of fuel supply system that comprises fuel circuit, wherein, in above-mentioned fuel circuit, utilize supply pump that the DME fuel in the fuel container is supplied to the DME motor via supplying pipe.
Background technique
Known have a fuel supply system that DME (dimethyl ether) fuel is supplied to the DME motor.Fuel supply system comprises the fuel circuit that utilizes supply pump the DME fuel in the fuel container to be supplied to the DME motor via supplying pipe.Above-mentioned fuel circuit constitutes and can make fuel cycle, and the fuel that is supplied to motor is back in fuel container or the supplying pipe.
In the past, the starting of the DME motor in the fuel supply system was undertaken by following mode.At first, supply with priming of pump.By this, the circulation of beginning fuel in fuel circuit.Then, confirm whether the pressure in the supplying pipe reaches authorized pressure.Do not reach at pressure under the situation of authorized pressure, for example carry out blowing out supplying pipe manually.Then, make engine start.
In patent documentation 1, an example of the starting method of DME motor is disclosed.The fuel supplying device of patent documentation 1 at fuel container to being provided with a plurality of supply pumps between the motor.In patent documentation 1, before engine start, control so that the pressure of each supply pump reaches goal pressure.Goal pressure is the above value of saturation vapour pressure of DME, is to make DME must become the value of liquid.Goal pressure can be determined based on the chart of the relation of the expression temperature of DME and vapor tension.Therefore, the control gear of patent documentation 1 detects the pressure at the temperature of DME and each supply pump inlet side place, and the output of setting each supply pump is to reach the pressure more than the vapor tension corresponding with temperature.Consequently, can prevent from the DME that is supplied with by each supply pump, having sneaked into bubble (DME steam).Then, after the pressure of all supply pumps all reaches goal pressure, the control gear ato unit.
Patent documentation 1: the Japan Patent spy opens the 2005-98260 communique
Summary of the invention
Invent technical problem to be solved
Under engine stop-state, DME is blown out by the fuel-injection pump from motor and/or DME is gone out clearly from fuel circuit.Consequently, in fuel circuit, can enter air, with the DME that replaces in fuel circuit, going out clearly.
When engine start, the supply pump starting.At this moment, the air in the fuel circuit can make supply pump air pocket (cavitation) occur.Air pocket can hinder the driving of supply pump.Consequently, the pressure of DME can't correctly rise.That is to say, exist air can hinder the starting of motor in the fuel circuit.On the other hand, even if the technology of patent documentation 1 can prevent the DME vaporization that Yin Wendu rises and causes, can not remove the air that has entered in the fuel circuit.
Therefore, the invention provides a kind of starting method that can not only prevent that before the DME engine start DME vaporization from can also remove the DME motor of the air that enters in the fuel circuit.
The technological scheme that the technical solution problem adopts
One aspect of the present invention is to provide the starting method of the DME motor in a kind of fuel supply system that comprises fuel circuit, wherein, in above-mentioned fuel circuit, utilize supply pump that the DME fuel in the fuel container is supplied to the DME motor via supplying pipe, it is characterized in that, comprise: cooler starting operation in this cooler starting operation, makes the fuel cooler starting of above-mentioned fuel being cooled off at least a portion of above-mentioned fuel circuit; Pipe is opened operation, opens in the operation at this pipe, opens above-mentioned supplying pipe; Pump starting operation, this pump starting operation makes above-mentioned supply pump starting after aforementioned tube is opened operation; Blow out operation, this blows out operation after said pump starting operation, above-mentioned supplying pipe is communicated with, until the outlet side of above-mentioned supply pump and the pressure difference between the inlet side reaches more than the authorized pressure difference and the pressure of above-mentioned supply pump outlet side reaches more than the authorized pressure with atmosphere; Temperature reduces the standby operation, reduces in the standby operation in this temperature, carries out standby after above-mentioned cooler starting operation, till the not enough set point of temperature of the temperature of the above-mentioned fuel at the assigned position place in above-mentioned fuel circuit; And starter starting operation, this starter starting operation makes the starter starting of above-mentioned DME motor finishing above-mentioned blowing out after operation and said temperature reduce the standby operation.
In the starting method of the DME of first aspect present invention motor, comparatively it is desirable to, can adopt structure (a)～(c).
(a): above-mentioned each operation is started operation, pipe by cooler and is opened operation, pump starting operation, above-mentionedly blows out the order that operation, said temperature reduce standby operation and above-mentioned starter starting operation and carry out.
(b): blow out in the operation above-mentioned, the pressure of above-mentioned supply pump outlet side is detected with the position near above-mentioned DME motor in the position near above-mentioned supply pump, be used for and pressure difference that the afore mentioned rules pressure difference compares be the pressure of above-mentioned supply pump inlet side with near the pressure difference between the pressure of the position of above-mentioned supply pump, the above-mentioned pressure that is used for comparing with afore mentioned rules pressure is the pressure of the position of close above-mentioned DME motor.
(c): above-mentioned fuel circuit comprises makes above-mentioned fuel be back to the reflow pipe of above-mentioned fuel container from above-mentioned DME motor, and above-mentioned fuel circulates between above-mentioned DME motor and above-mentioned fuel container.
The invention effect
The present invention can not only prevent that DME from vaporizing before the DME engine start, can also remove the air that enters in the fuel circuit before the DME engine start.
Description of drawings
Fig. 1 is the schematic representation of expression fuel supply system.
Fig. 2 is the flow chart of the starting method of expression DME motor.
Embodiment
Fig. 1 is the schematic representation of expression fuel supply system and DME supply source 100.Fuel supply system is motor 2 to be supplied with the system of DME fuel.DME supply source 100 is supplied to DME fuel the fuel container 3 of fuel supply system.
Fuel supply system comprises for the fuel circuit 1 of supplying with fuel.Fuel circuit 1 comprises motor 2, fuel container 3, high-pressure service pump 4.
Fuel circuit 1 comprises: supplying pipe 10, and this supplying pipe 10 is supplied to motor 2 with fuel from fuel container 3; Reflow pipe 20, this reflow pipe 20 makes fuel be back to fuel container 3 from motor 2; And bypass tube 30, this bypass tube 30 is connected supplying pipe 10 with reflow pipe 20.Supplying pipe 10 is made of the first sub-supplying pipe 11, the second sub-supplying pipe 12, the 3rd sub-supplying pipe 13, the 4th sub-supplying pipe 14.Reflow pipe 20 is made of the first sub-reflow pipe 21, the second sub-reflow pipe 22, the 3rd sub-reflow pipe 23, the 4th sub-reflow pipe 24.Bypass tube 30 is made of the first sub-bypass tube 31 and the second sub-bypass tube 32.
Fuel circuit 1 also comprises three discharge pipes 71,72 and 73 and anti-fistulae 80.First discharge pipe 71, second discharge pipe 72 and the 3rd discharge pipe 73 are that the gas in the fuel circuit 1 is discarded to pipe in the atmosphere.First discharge pipe 71 is communicated with atmosphere.Second discharge pipe 72 is confluxed in the downstream side part of conflux portion 1c place and first discharge pipe 71.The 3rd discharge pipe 73 is confluxed in the downstream side part of conflux portion 1d place and second discharge pipe 72.Anti-fistulae 80 is that the fuel recovery that will spill from the each several part in the fuel circuit 1 is to the pipe of fuel container 3.
High-pressure service pump (supply pump) 4 is configured between the first sub-supplying pipe 11 and the second sub-supplying pipe 12.Motor 2 is configured between the 4th sub-supplying pipe 14 and the first sub-reflow pipe 21.Fuel container 3 is configured between the 4th sub-reflow pipe 24 and the first sub-supplying pipe 11.
Furcation 1a is the joint of supplying pipe 10 and bypass tube 30.The 2nd sub-supplying pipe 12 is branched into the 3rd sub-supplying pipe 13 and the first sub-bypass tube 31 at furcation 1a place.The portion 1b of confluxing is the joint of reflow pipe 20 and bypass tube 30.The second sub-bypass tube 32 and the 3rd sub-reflow pipe 23 conflux at conflux portion 1b place and the 4th sub-reflow pipe 24.
Fuel circuit 1 comprises two solenoid valve CV-1, CV-2.The first solenoid valve CV-1 is configured between the 3rd sub-supplying pipe 13 and the 4th sub-supplying pipe 14.The second solenoid valve CV-2 is configured between the first sub-reflow pipe 21 and the second sub-reflow pipe 22.
Fuel circuit 1 comprises two pressure-regulating valves 41,42.First pressure-regulating valve 41 is configured between the first sub-bypass tube 31 and the second sub-bypass tube 32.Second pressure-regulating valve 42 is configured between the second sub-reflow pipe 22 and the 3rd sub-reflow pipe 23.Two pressure-regulating valves 41, the 42nd arrange for the pressure of the fuel that will be supplied to motor 2 keeps certain.Pressure between high-pressure service pump 4 and two pressure-regulating valves 41,42 the upstream side is retained high pressure.Be low pressure between two pressure-regulating valves 41,42 downstream side and the high-pressure service pump 4.In the present embodiment, high pressure is 1.6MPa, and low pressure is 0.6MPa.
Fuel circuit 1 comprises two one-way valves 43,44.One-way valve 43 is configured between the 4th sub-reflow pipe 24 and the fuel container 3.One-way valve 44 is configured between anti-fistulae 80 and the fuel container 3.One-way valve 43,44 can prevent that fuel from flowing backward to pipe 24,80 from fuel container 3.
For blowing out (Japanese: パ one ジ), fuel circuit 1 comprises two solenoid valve RV-1, RV-2 and two cut-off valves 91,92.The first solenoid valve RV-1 is configured between the 1d of portion on second discharge pipe 72 at the 1c of portion and confluxing of confluxing.The second solenoid valve RV-2 is configured on first discharge pipe 71 at the upstream side of the 1c of portion that confluxes.First cut-off valve 91 is configured between the 4th sub-supplying pipe 14 and second discharge pipe 72.Second cut-off valve 92 is configured between the first sub-reflow pipe 21 and the 3rd sub-discharge pipe 73.
In case the gas of opening in the first solenoid valve RV-1 and first cut-off valve, 91, the four sub-supplying pipes 14 will be released in the atmosphere via second discharge pipe 72.In case the gas of opening in the first solenoid valve RV-1 and second cut-off valve, 92, the first sub-reflow pipes 21 will be released in the atmosphere via the 3rd discharge pipe 73.In case open the second solenoid valve RV-2, the gas in the fuel container 3 will be released in the atmosphere via first discharge pipe 71.
The each several part of fuel supply system in fuel circuit 1 is provided with six pressure transducer PS-2, PS-3, PS-4, PS-5, PS-6, the PS-7 that the pressure to fuel detects.The second pressure transducer PS-2 detects the pressure of the fuel in the first sub-supplying pipe 11.At this, the pressure of the fuel in the first sub-supplying pipe 11 equals the pressure of the fuel in the fuel container 3.The 3rd pressure transducer PS-3 detects the pressure of the fuel in the second upstream supplying pipe 12.The 4th pressure transducer PS-4 detects the pressure of the fuel in the 4th sub-supplying pipe 14.The 5th pressure transducer PS-5 detects the pressure of the fuel in the second sub-reflow pipe 22.The 6th pressure transducer PS-6 detects the pressure of the fuel in the 4th sub-reflow pipe 24.The 7th pressure transducer PS-7 detects the pressure of the fuel in the anti-fistulae 80.
Fuel supply system comprises two fuel cooler 51,52 of cooling off for to the fuel in the fuel circuit 1.Fuel cooler 51, the 52nd, cooling unit (device that refrigeration agent is cooled off).Fuel in 51 pairs of supplying pipes of first fuel cooler 10 cools off.The heat exchanger 51a of first fuel cooler 51 is configured in the second sub-supplying pipe 12.Fuel in 52 pairs of reflow pipes of second fuel cooler 20 cools off.The heat exchanger 52a of second fuel cooler 52 is configured in the 4th sub-reflow pipe 24.
The each several part of fuel supply system in fuel circuit 1 comprises eight temperature transducers 61～68 that the temperature to fuel detects.The temperature of the fuel in 61 pairs of first sub-supplying pipes 11 of first temperature transducer detects.The temperature to the fuel in the upstream side of first heat exchanger 51 and downstream side detects at the second sub-supplying pipe, 12 places for second temperature transducer 62 and three-temperature sensor 63.The terminal part of 64 pairs of supplying pipes 10 of the 4th temperature transducer is that the temperature of fuel of the ingress of motor 2 detects.The front end of 65 pairs of reflow pipes 20 of the 5th temperature transducer is that the temperature of fuel in the outlet port of motor 2 detects.The temperature to the fuel in the upstream side of second heat exchanger 52 and downstream side detects at the 4th sub-reflow pipe 24 places for the 6th temperature transducer 66 and the 7th temperature transducer 67.The temperature of the fuel in 68 pairs of anti-fistulaes 80 of the 8th temperature transducer detects.
Fuel supply system comprises control gear 6.Control gear 6 can be controlled motor 2, high-pressure service pump 4 and fuel cooler 51,52 driving.The aperture of two solenoid valve CV-1, CV-2 can be kept or change to control gear 6.Control gear 6 can be confirmed by six pressure transducer PS-2～PS-7 and eight detection information that temperature transducer 61～68 obtains.
Roughly action when fuel supply system is driven describes.In fuel supply system, under the work of high-pressure service pump 4, the fuel in the fuel container 3 is supplied to motor 2 via supplying pipe 10.Be supplied to the fuel of motor 2 through after the motor 2, be back in the fuel container 3 via reflow pipe 20.In addition, a part that is supplied in the fuel of supplying pipe 10 is back in the fuel container 3 via bypass tube 30 and reflow pipe 20, and without motor 2.Fuel is cooled off by first fuel cooler 51 in supplying pipe 10, and is cooled off by second fuel cooler 52 in reflow pipe 20.Owing to there is bypass tube 30, therefore, increase through fuel cooler 51,52 flow fuel.Therefore, can easily cool off fuel.
With reference to Fig. 2, the starting method of the motor 2 in the fuel supply system is described.Fig. 2 is the flow chart of the starting method of expression DME motor 2.Control gear 6 is according to the flow performing engine start control of Fig. 2.Engine start control comprises each operation of aftermentioned.
Under the halted state of motor 2, just in the zero hour of engine start control, with four solenoid valve CV-1, CV-2, RV-1 and RV-2 and two cut-off valves 91,92 Close Alls.In addition, also stop motor 2, high-pressure service pump 4 and two fuel cooler 51,52 driving.
Fuel supply system comprises be used to piloting engine 2 enable switch.In step S1, be pressed in case detect enable switch, control gear 6 just begins engine start control.
In step S2, control gear 6 makes two fuel cooler 51,52 startings.The processing of step S2 is cooler starting operation.
In step S3, control gear 6 is opened two solenoid valve CV-1, CV-2.Consequently, fuel is in the state that can flow in supplying pipe 10 and reflow pipe 20.The processing of step S3 is that pipe is opened operation.
In step S4, control gear 6 makes high-pressure service pump (supply pump) 4 startings.Consequently, fuel begins to flow in fuel circuit 1.The processing of step S4 is supply pump starting operation.
In step S5, control gear 6 was waited for first standby time of regulation before carrying out next step S6.First standby time for example is configured to the time till high-pressure service pump 4 reaches stable rotation.In the present embodiment, first standby time is 5 seconds.
Step S6 to the processing of step S12 be for carrying out the operation that blows out that gas blows out.The processing that blows out in the operation is the circular treatment of repeated execution of steps S6 to S12 under rated condition.The result of determination of above-mentioned circular treatment in step S6 and step S7 finishes when being "Yes".When the result of determination of any one is "No" in step S6 and step S7, repeat circular treatment.
In step S6, whether the outlet side of 6 pairs of high-pressure service pumps 4 of control gear and the pressure difference between the inlet side are to judge more than the authorized pressure difference.Control gear 6 can be based on the pressure of being held high-pressure service pump 4 inlet sides by the detected detection information of the second pressure transducer PS-2.Control gear 6 can be based on the pressure of being held high-pressure service pump 4 outlet sides by the detected detection information of the 3rd pressure transducer PS-3.The pressure that above-mentioned pressure difference can deduct inlet side by the pressure with outlet side obtains.Therefore, control gear 6 can be held the outlet side of high-pressure service pump 4 and the pressure difference between the inlet side.The authorized pressure difference is configured to the index be used to the working state of knowing high-pressure service pump 4.That is to say that the pressure difference in high-pressure service pump 4 is during greater than the authorized pressure difference, high-pressure service pump 4 is worked suitably.In the present embodiment, the authorized pressure difference for example is 0.3MPa.
Be authorized pressure poor (0.3MPa) when above in the pressure difference of high-pressure service pump 4, control gear 6 makes to handle and moves to step S7.When the pressure difference deficiency authorized pressure difference of high-pressure service pump 4, control gear 6 makes to handle and moves to step S8.
In step S7, whether the pressure of 6 pairs of high-pressure service pump 4 outlet sides of control gear is to judge more than the authorized pressure.Control gear 6 can be based on the pressure of being held high-pressure service pump 4 outlet sides by the detected detection information of the 4th pressure transducer PS-4.Authorized pressure is configured to the index be used to the pressure of knowing the fuel that is supplied to motor 2.That is to say that the pressure of high-pressure service pump 4 outlet sides is during greater than authorized pressure, the pressure that is supplied to the fuel of motor 2 is suitable.In the present embodiment, authorized pressure for example is 1.5MPa.In addition, comparatively it is desirable to, the pressure of the outlet side among the step S7 is the pressure near the position of motor 2.Therefore, in step S7, use the checkout value of the 4th pressure transducer PS-4 to replace the checkout value of the 3rd pressure transducer PS-3 that in step S6, uses.
Be authorized pressure (1.5MPa) when above at the pressure of outlet side, control gear 6 makes to handle and moves to step S13.That is to say that control gear 6 finishes the circular treatment of step S6 to S12.When the underpressure authorized pressure of outlet side, control gear 6 makes to handle and moves to step S8.
In step S8, control gear 6 is opened the first solenoid valve RV-1 and cut-off valve 91,92.Consequently, the gas (air and DME steam) in supplying pipe 10 and the reflow pipe 20 is blown to atmosphere.
In step S9, control gear 6 was waited for second standby time of regulation before carrying out next step S10.Second standby time is set to the time of bleeding.In the present embodiment, second standby time is 1 second.During second standby time, carry out blowing out of gas.
In step S10, control gear 6 cuts out the first solenoid valve RV-1 and cut-off valve 91,92.Consequently, finish blowing out of gas.
In step S11, control gear 6 was waited for the 3rd standby time of regulation before carrying out next step S10.The 3rd standby time is configured to make after execution blows out the fuel in the fuel circuit 1 to stablize the required time.In the present embodiment, the 3rd standby time is 40 seconds.
In step S12, control gear 6 judges whether the pressure at first endurance inner high voltage pump 4 outlet sides of regulation continues to surpass authorized pressure.First endurance was set to the index be used to the degree of stability of knowing high-pressure service pump 4 drivings.In the present embodiment, first endurance was 40 seconds.
When the checkout value of the 4th pressure transducer PS-4 in first endurance (40 seconds) continued to surpass 1.5MPa, control gear 6 made to handle and moves to step S6.On the contrary, when the checkout value of the 4th pressure transducer PS-4 in first endurance can not continue to surpass 1.5MPa, control gear 6 was judged as and makes a mistake, and engine start control is finished.
The processing of step S13 to S15 is to reduce the standby operation for waiting for until fuel-cooled temperature.The processing that temperature reduces in the standby operation is the circular treatment of repeated execution of steps S13 to S15 under rated condition.Above-mentioned circular treatment finishes during for "Yes" in the result of determination of step S13.When the result of determination of step S13 is "No", repeat circular treatment.
In step S13, the temperature of the fuel of the ingress of 6 pairs of motors 2 of control gear whether judge by not enough set point of temperature.Control gear 6 can be held the temperature of the fuel of motor 2 ingress based on the detection information that is obtained by the 4th temperature transducer 64.Set point of temperature is configured to be used to the index of knowing fuel cooler 51,52 working state.In the present embodiment, set point of temperature is 30 ℃.
When the not enough set point of temperature of temperature (30 ℃) of motor entrance, control gear 6 makes to handle and moves to step S16.Be set point of temperature when above in the temperature of motor entrance, control gear 6 makes to handle and moves to step S14.
In step S14, control gear 6 was waited for the 4th standby time of regulation before carrying out next step S15.It is the not enough required sufficient time of set point of temperature of temperature that makes fuel that the 4th standby time is configured to when fuel cooler 51,52 proper functioning.In the present embodiment, the 4th standby time is 3 minutes.
In step S15, whether the temperature of 6 pairs of fuel in second endurance of regulation of control gear continues not enough set point of temperature is judged.Second endurance was set to be used to the index of knowing fuel cooler 51,52 degrees of stability that drive.In the present embodiment, second endurance was 5 minutes.
When the checkout value of the 4th temperature transducer 64 in second endurance (5 minutes) continued 30 ℃ of less thaies, control gear 6 made to handle and moves to step S13.On the contrary, when the checkout value of the 4th temperature transducer 64 in second endurance can not continue 30 ℃ of less thaies, control gear 6 was judged as and makes a mistake, and engine start control is finished.
In step S16, control gear 6 makes the starter starting of motor 2.That is to say, carry out the starting of motor 2.
Then, in step S17, control gear 6 finishes engine start control.
In the present embodiment, have following effect and effect., do not make engine start, and gas (air and DME steam) is blown out than authorized pressure difference hour and/or at the pressure ratio authorized pressure of motor 2 entrances hour in the outlet side of high-pressure service pump 4 and the pressure difference between the inlet side.Therefore, the present embodiment air that can will enter in the fuel circuit 1 before making motor 2 starting is removed.Therefore, present embodiment can be avoided making high-pressure service pump 4 such unfavorable condition of can't correctly working in the fuel circuit 1 because air enters.
In addition, when the temperature of motor 2 entrances was higher than set point of temperature, motor 2 was inoperative.Therefore, present embodiment can prevent the vaporization before motor 2 startings of DME fuel.Therefore, present embodiment can be avoided making the unfavorable condition that high-pressure service pump 4 can not correctly work or the unfavorable condition that motor 2 can not be started rightly because of the DME steam in the fuel circuit 1.
The present invention can adopt following variation.
In the present embodiment, each operation in the engine start control is opened operation, (3) pump starting operation, (4) by (1) cooler starting operation, (2) pipe and is blown out the order that operation, (5) temperature reduce standby operation and (6) starter starting operation and carry out.At this, as long as the execution sequence of each operation meets the following conditions.(2) pipe is opened operation, (3) pump starting operation and (5) and is blown out operation and need carry out by the order of (2) (3) (4).(1) cooler starting operation, (5) temperature reduction standby operation need be carried out by the order of (1), (5).But the operation group of (2), (3) and (4) is not limited with the execution sequence of the operation group of (1) and (5).For example, also can after (3) pump starting operation, carry out (1) cooler starting operation.Or, also can carry out (4) side by side in overlapping mode of time of implementation and blow out operation and (5) temperature reduction standby operation.
In the present embodiment, the pressure of high-pressure service pump 4 outlet sides is to detect near the position of high-pressure service pump 4 with near the position of motor 2.The 3rd pressure transducer PS-3 is positioned at comparison near the position of high-pressure service pump 4, and the 4th pressure transducer PS-4 is positioned at comparison near the position of motor 2.In blowing out operation (step S5), be used for and pressure difference that the authorized pressure difference compares is pressure difference between the pressure of pressure and the position of close high-pressure service pump 4 of high-pressure service pump 4 inlet sides.Blow out in the operation (step S6) above-mentioned, the pressure that is used for comparing with afore mentioned rules pressure is the pressure near the position of motor 2.The pressure of high-pressure service pump 4 outlet sides can be not yet at two diverse location places as mentioned above but detect at the same position place.
In the present embodiment, reduce in the standby operation (step S7) in temperature, the temperature of the fuel in the fuel circuit 1 that is used for comparing with set point of temperature is used the temperature near the position of motor 2.64 pairs of temperature near the position of motor 2 of the 4th temperature transducer detect.Be used for the temperature of the fuel that compares with set point of temperature so long as the temperature at the assigned position place in the fuel circuit 1 get final product, be not limited to the temperature of the position of close motor 2.
In the present embodiment, fuel circuit 1 comprises supplying pipe 10, reflow pipe 20 and bypass tube 30.Therefore, a part of fuel circulates in motor 2 and fuel container 3, and other fuel circulates in fuel container 3 without motor 2.The loop 1 that acts as a fuel is not limited to said structure.Fuel circuit also can be the structure that does not comprise bypass tube 30.In fuel circuit, also can be or not fuel container 3 places and midway confluxing at supplying pipe 10 from the reflow pipe of motor 2.
(symbol description)
1 fuel circuit
The 2DME motor
3 fuel containers
4 high-pressure service pumps (supply pump)
10 supplying pipes
20 reflow pipes
51 first fuel cooler
52 second fuel cooler
64 the 4th temperature transducers 64 (sensor that the temperature near the position of motor is detected)
71 first discharge pipes
72 second discharge pipes
73 the 3rd discharge pipes
80 anti-fistulaes
PS-2 second pressure transducer (sensor that the pressure of supply pump inlet side is detected)
PS-3 the 3rd pressure transducer (sensor that the pressure near the position of supply pump is detected at the outlet side of supply pump)
PS-4 the 4th pressure transducer (sensor that the pressure near the position of motor is detected at the outlet side of supply pump)
Claims (4)
1. the starting method of the DME motor in the fuel supply system that comprises fuel circuit wherein, in described fuel circuit, utilizes supply pump that the DME fuel in the fuel container is supplied to the DME motor via supplying pipe, it is characterized in that, comprising:
Cooler starting operation in this cooler starting operation, makes the fuel cooler starting of described fuel being cooled off at least a portion of described fuel circuit;
Pipe is opened operation, opens in the operation at this pipe, opens described supplying pipe;
Pump starting operation, this pump starting operation makes described supply pump starting after described pipe is opened operation;
Blow out operation, this blows out operation after described pump starting operation, described supplying pipe is communicated with, until the outlet side of described supply pump and the pressure difference between the inlet side reaches more than the authorized pressure difference and the pressure of described supply pump outlet side reaches more than the authorized pressure with atmosphere;
Temperature reduces the standby operation, and this temperature reduces the standby operation and carry out standby after described cooler starting operation, till the not enough set point of temperature of the temperature of the described fuel at the assigned position place in described fuel circuit; And
Starter starting operation, this starter starting operation makes the starter starting of described DME motor finishing described blowing out after operation and described temperature reduce the standby operation.
2. the starting method of DME motor as claimed in claim 1 is characterized in that,
Described each operation is started operation, pipe by cooler and is opened operation, pump starting operation, describedly blows out the order that operation, described temperature reduce standby operation and described starter starting operation and carry out.
3. the starting method of DME motor as claimed in claim 1 is characterized in that,
Blow out in the operation described, the pressure of the outlet side of described supply pump is detected with the position near described DME motor in the position near described supply pump,
Be used for and pressure difference that described authorized pressure difference compares is pressure difference between the pressure of pressure and the position of close described supply pump of inlet side of described supply pump,
The described pressure that is used for comparing with described authorized pressure is the pressure near the position of described DME motor.
4. the starting method of DME motor as claimed in claim 1 is characterized in that,
Described fuel circuit comprises makes described fuel be back to the reflow pipe of described fuel container from described DME motor,
Described fuel circulates between described DME motor and described fuel container.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009167932A JP5259514B2 (en) | 2009-07-16 | 2009-07-16 | How to start the DME engine |
| JP2009-167932 | 2009-07-16 | ||
| PCT/JP2010/061965 WO2011007827A1 (en) | 2009-07-16 | 2010-07-15 | Method for starting dme engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102472203A CN102472203A (en) | 2012-05-23 |
| CN102472203B true CN102472203B (en) | 2013-08-14 |
Family
ID=43449436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080032642XA Active CN102472203B (en) | 2009-07-16 | 2010-07-15 | Method for starting DME engine |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5259514B2 (en) |
| KR (1) | KR101333392B1 (en) |
| CN (1) | CN102472203B (en) |
| WO (1) | WO2011007827A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6333703B2 (en) * | 2014-11-04 | 2018-05-30 | 愛三工業株式会社 | Liquefied gas fuel supply device |
| JP2016098717A (en) * | 2014-11-20 | 2016-05-30 | いすゞ自動車株式会社 | Fuel supply device for dimethyl ether vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037978A (en) * | 2006-03-16 | 2007-09-19 | 现代自动车株式会社 | Liquefied petroleum gas injection (lpi) system, and method for preventing gas leakage and poor starting performance using the same |
| JP2007263064A (en) * | 2006-03-29 | 2007-10-11 | Isuzu Motors Ltd | Dimethyl ether engine-mounted vehicle |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0281947A (en) * | 1988-09-17 | 1990-03-22 | Daihatsu Motor Co Ltd | Fuel pump control method |
| JP2000110683A (en) * | 1998-10-09 | 2000-04-18 | Nkk Corp | Diesel engine for low boiling point fuel |
| JP2000127902A (en) | 1998-10-26 | 2000-05-09 | Matsushita Electric Works Ltd | Engine starting system and engine device equipped therewith |
| JP2002276473A (en) * | 2001-03-22 | 2002-09-25 | Isuzu Motors Ltd | Fuel supply system for dimethyl ether engine |
| JP3932190B2 (en) * | 2002-05-16 | 2007-06-20 | ボッシュ株式会社 | DME fuel supply system for diesel engine |
| JP4168893B2 (en) * | 2003-09-26 | 2008-10-22 | いすゞ自動車株式会社 | Fuel supply device |
-
2009
- 2009-07-16 JP JP2009167932A patent/JP5259514B2/en not_active Expired - Fee Related
-
2010
- 2010-07-15 CN CN201080032642XA patent/CN102472203B/en active Active
- 2010-07-15 WO PCT/JP2010/061965 patent/WO2011007827A1/en active Application Filing
- 2010-07-15 KR KR1020117031160A patent/KR101333392B1/en active IP Right Grant
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037978A (en) * | 2006-03-16 | 2007-09-19 | 现代自动车株式会社 | Liquefied petroleum gas injection (lpi) system, and method for preventing gas leakage and poor starting performance using the same |
| JP2007263064A (en) * | 2006-03-29 | 2007-10-11 | Isuzu Motors Ltd | Dimethyl ether engine-mounted vehicle |
Non-Patent Citations (5)
| Title |
|---|
| JP平2-81947A 1990.03.22 |
| JP特开2000-110683A 2000.04.18 |
| JP特开2002-276473A 2002.09.25 |
| JP特开2005-98260A 2005.04.14 |
| JP特开2007263064A 2007.10.11 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20120024861A (en) | 2012-03-14 |
| CN102472203A (en) | 2012-05-23 |
| KR101333392B1 (en) | 2013-11-28 |
| JP2011021557A (en) | 2011-02-03 |
| JP5259514B2 (en) | 2013-08-07 |
| WO2011007827A1 (en) | 2011-01-20 |
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Address after: Osaka, Japan Patentee after: Yangma Power Technology Co., Ltd Address before: Osaka Japan Patentee before: YANMAR Co.,Ltd. |