WO2002081896A1 - Appareil d'alimentation en carburant gazeux - Google Patents

Appareil d'alimentation en carburant gazeux Download PDF

Info

Publication number
WO2002081896A1
WO2002081896A1 PCT/JP2002/000481 JP0200481W WO02081896A1 WO 2002081896 A1 WO2002081896 A1 WO 2002081896A1 JP 0200481 W JP0200481 W JP 0200481W WO 02081896 A1 WO02081896 A1 WO 02081896A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
vaporizer
lpg
cooling water
liquid
Prior art date
Application number
PCT/JP2002/000481
Other languages
English (en)
Japanese (ja)
Inventor
Noboru Sakamoto
Hiromitsu Matsumoto
Original Assignee
Yamaha Hatsudoki Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yamaha Hatsudoki Kabushiki Kaisha filed Critical Yamaha Hatsudoki Kabushiki Kaisha
Publication of WO2002081896A1 publication Critical patent/WO2002081896A1/fr

Links

Classifications

    • 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
    • F02M21/06—Apparatus for de-liquefying, e.g. by heating
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0209—Hydrocarbon fuels, e.g. methane or acetylene
    • F02M21/0212—Hydrocarbon fuels, e.g. methane or acetylene comprising at least 3 C-Atoms, e.g. liquefied petroleum gas [LPG], propane or butane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • 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
    • F02M21/0239—Pressure or flow regulators therefor
    • 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
    • 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

Definitions

  • the present invention relates to a gas fuel supply device configured to vaporize LFG fuel in a fuel tank into a gaseous fuel by a vaporizer and supply the gaseous fuel to an internal combustion engine, and more particularly, to the presence or absence of liquid LPG fuel flowing into the vaporizer.
  • the present invention relates to an arrangement structure of a fuel level detector for detecting a fuel level.
  • LPG such as propane or butane
  • a gas fuel supply device that vaporizes LPG fuel in the fuel tank with a vaporizer and supplies it to the engine.
  • a vaporizer of this type is generally configured to promote the vaporization of LFG fuel by introducing engine cooling water.
  • the LPG fuel flowing into the vaporizer may be supplied to the engine in a state of a liquid fuel. In order to prevent such liquid fuel from flowing into the engine, it is effective to detect the liquid level of the LPG fuel in the vaporizer and control the fuel supply.
  • the present invention has been made in view of the above circumstances, and has as its object to provide a gas fuel supply device that can prevent LPG fuel flowing into a vaporizer from being supplied to an engine in a state of a liquid fuel. Disclosure of the invention
  • the invention according to claim 1 is a gas fuel supply device in which LFG fuel in a fuel tank is vaporized by a vaporizer into gaseous fuel and supplied to an internal combustion engine. It is characterized by a fuel level sensor that detects the presence or absence of liquid LPG fuel flowing into the paralyzer.
  • the invention according to claim 2 is a gas fuel supply device in which the LPG fuel in the fuel tank is vaporized by a vaporizer into gaseous fuel and supplied to the internal combustion engine, wherein the temperature of the LPG fuel in the vaporizer is Fuel temperature control means for controlling the temperature of the LFG fuel so that it does not become higher than a predetermined value is provided.
  • the invention according to claim 3 is characterized in that, in claim 1, the fuel level sensor is disposed so as to be obliquely upward with the sensing unit side higher than the liquid level in the paralyzer.
  • a fourth aspect of the present invention is characterized in that, in the third aspect, the vaporizer is provided with a fuel avoiding rib for preventing the liquid LFG fuel from directly touching the sensing portion.
  • the invention according to claim 5 is characterized in that, in claim 1 or 2, a plurality of dispersion promoting ribs for promoting dispersion of the liquid LPG fuel are formed in a radial shape in the base pariser. .
  • FIG. 1 is a front view of a vaporizer constituting a part of a gas fuel supply device according to an embodiment of the present invention
  • FIG. 2 is a right side view of the vaporizer
  • FIG. Fig. 4 is a front view of the vaporizer (a cross-sectional view taken along the line 11 I-1U in Fig. 2).
  • FIG. 1 is a front view of a vaporizer constituting a part of a gas fuel supply device according to an embodiment of the present invention
  • FIG. 2 is a right side view of the vaporizer
  • FIG. Fig. 4 is a front view of the vaporizer (a cross-sectional view taken along the line 11 I-1U in Fig. 2).
  • FIG. 1 is a front view of a vaporizer constituting a part of a gas fuel supply device according to an embodiment of the present invention
  • FIG. 2 is a right side view of the vaporizer
  • FIG. Fig. 4 is a front view of the vaporizer (a cross-
  • FIG. 5 is a rear view of the vaporizer (shown along the line VV in FIG. 2), and FIG. 6 is a cross-sectional view of the vaporizer on which the fuel level sensor is mounted.
  • Fig. 7 is a sectional side view of the vaporizer (a sectional view taken along the line VII-VII in Fig. 3).
  • Fig. 7 is a sectional view of the fuel level.
  • FIG. 9 is a fuel detection operation diagram of the fuel level sensor
  • FIG. 9 is a fuel detection operation diagram of the fuel level sensor
  • FIG. 1 to 10 are diagrams for explaining a gas fuel supply device according to an embodiment of the present invention.
  • FIG. 2 is a front view and a side view of a vaporizer provided in the gas fuel supply device.
  • Fig. 3 is a front view of the vaporizer facing (II-III line in Fig. 2)
  • Fig. 4 is a cross-sectional front view of the vaporizer (IV-IV cross section in Fig. 2)
  • Fig. 5 Back view of the vaporizer V-V line of Fig. 2)
  • Fig. 6 is a cross-sectional view of the vaporizer equipped with the fuel level sensor (VI-VI cross-sectional view of Fig. 4).
  • Fig. 7 is a cross-sectional side view of the vaporizer (a cross-sectional view taken along the line VI-VI in Fig. 3).
  • Figs. 8 and 9 are explanatory diagrams of the fuel detection operation of the fuel level sensor.
  • FIG. 8 and 9 are explanatory diagrams
  • reference numeral 1 denotes a gas fuel supply device, which is configured to vaporize LFG fuel filled in a fuel tank 2 into gaseous fuel and supply the gaseous fuel to each fuel injection valve 4 of an engine 3. It is.
  • the engine 3 is a water-cooled four-cycle four-cylinder engine, and the fuel injection valve 4 is mounted on each cylinder.
  • Each fuel injection valve 4 is connected to a common delivery pipe 5.
  • An upstream end 6 a of a fuel supply pipe 6 is inserted into the fuel tank 2, and a downstream end 6 b of the fuel supply pipe 6 is connected to the delivery pipe 5.
  • a fuel pump 7 is disposed in the fuel tank 2, and a discharge port 7 a of the fuel pump 7 is provided upstream of the fuel supply pipe 6 with a check valve 10 for preventing reverse flow of fuel interposed therebetween. End 6a is connected.
  • a relief pipe 9 having a relief valve 8 is connected to the upstream end 6 a of the fuel supply pipe 6.
  • the relief pressure of the relief valve 8 is set to be equal to or smaller than the fuel pressure set value on the outlet side of the pressure setter 16 described later.
  • the fuel supply pipe 6 is provided with a manual valve 11 in order from the upstream side, a solenoid valve 12 for shutting off fuel supply in an emergency, and a fuel filter 13 for filtering fuel.
  • a pressure setter 16 having a vaporizer 15 for vaporizing LPG fuel into gaseous fuel and a surge tank section 16a for storing gaseous fuel is provided downstream of the fuel filter 13 of the fuel supply pipe 6. Have been.
  • the volume of the surge tank 16a is set to 3 to 7.5% of the total stroke volume of the engine 3.
  • the pressure setting device 16 adjusts the gaseous fuel in the surge tank 16a to a set pressure.
  • the set pressure is, for example, in the range of 0.2 to 0.45 Mpa. It is set to a value and supplied to each of the fuel injection valves 4 at the set pressure (fuel injection pressure). .
  • the gas fuel supply device 1 has an ECU (not shown). This ECU controls the injection timing, injection amount, ignition coil ignition timing, and the like of each fuel injection valve 4 according to the operating state of the engine 3.
  • the ECU is provided on the outlet side of the fuel tank pressure sensor 17 provided on the fuel tank 2, the fuel level sensor 18 provided on the vaporizer 15, and the pressure setting device 16.
  • Each detected value from the gaseous fuel pressure sensor 19 is inputted, and the fuel pump 7, the solenoid valve 9, the throttle valve and the like are operated based on these detected values. Drive control.
  • the fuel pump 7 is driven.
  • the operation of the fuel pump 7 is stopped even if is less than the set value. That is, after the engine is started, the fuel level sensor 18 is not detecting fuel, and the gas fuel pressure at the outlet of the pressure setter 16 is lower than a set value (for example, 0.4 Mpa).
  • a set value for example, 0.4 Mpa.
  • the fuel pump 7 is stopped. Also, even if the LPG fuel is below the predetermined level, the fuel pump 7 is stopped when the gaseous fuel pressure is above the set value. As a result, excessive fuel supply by the fuel pump 7 can be avoided, the fuel injection pressure can be secured, and the outflow of LPG fuel can be prevented.
  • the vaporizer 15 introduces the cooling water A of the engine 3 into a water jacket 22 formed in a housing 20 and a vaporizer chamber 2 as shown in FIGS.
  • the LPG fuel B from the fuel tank 2 is supplied into 1 to vaporize it into gaseous fuel, and has the following structure in detail.
  • the housing 20 has a front and rear split structure in which a housing block 20b is hermetically bolted to a housing body 20a.
  • the vaporizer chamber 21 is formed in the center of the housing body 20a so as to form a cylindrical shape, and the water jacket 2 is formed so as to surround the outer peripheral surface and the back surface of the vaporizer chamber 21. 2 are formed.
  • the vaporizer room 21 and the water jacket 22 are airtightly closed by the above-mentioned housing block 20b and the water jacket cover 24.
  • the rear end face of the housing block 2 O b is closed airtightly by the lid plate 23. Is blocked.
  • a fuel inlet 25 that opens to the left is formed in the upper part of the left wall of the housing block 20b.
  • the fuel inlet 25 is formed in the upper part of the left wall of the housing body 20a in the same direction as the fuel inlet 25.
  • An open fuel outlet 26 is formed.
  • the fuel inlet 25 is connected to the downstream side of the fuel filter 13, and the fuel outlet 26 is connected to the upstream side of a fuel supply pipe 6.
  • a fuel introduction passage 30 communicating with the lower surface portion 21a of the vaporizer chamber 21 is formed obliquely downward at a lower portion of the housing body 20a.
  • the fuel inlet 25 communicates with the fuel introduction passage 30 via a fuel passage (not shown) formed in the housing block 2 Ob (see FIGS. 3, 4, and 7).
  • a scattered fuel avoiding rib 31 having a rectangular cross section with the upper surface 21b.
  • the vaporizer chamber 21 communicates with the fuel outlet 26 through a rectangular tubular fuel outflow passage 3 formed by the scattered fuel avoiding rib 31.
  • a plurality of dispersion promoting ribs 35 are formed in the vaporizer chamber 21.
  • Each of the dispersion promoting ribs 35 is formed so as to have a radial upward shape as a whole such that the lower end thereof is directed to the discharge port of the fuel introduction passage 30.
  • the fuel B flowing into the vaporizer chamber 21 from the fuel introduction passage 30 is radially dispersed and diffused by the respective dispersion promoting ribs 35, thereby promoting vaporization.
  • the vaporized fuel flows to the fuel outlet 26 through the fuel outlet passage 32 (see FIG. 4).
  • a pair of left and right fuel avoidance ribs 36, 36 are formed on the lower surface 21a of the vaporizer chamber 21 so as to expand leftward and rightward and extend upward.
  • the fuel introduction passage 30 is open between the left and right fuel avoiding ribs 36, and the upper end of each fuel avoiding rib 36 is close to the inner peripheral wall of the gas barrier chamber 21. This prevents the liquid fuel scattered in the vaporizer chamber 21 from directly falling on the sensing portion 18b of the fuel level sensor 18 described later.
  • a cooling water inlet 38 that opens downward is connected to the right side wall of the housing body 20a, and the cooling water inlet 38 is connected to the water inlet 22a of the data jacket 22. Communicating. Further, a cooling water outlet 39 that opens to the left is connected to the lower portion of the left side wall portion, and the cooling water outlet 39 communicates with the water outlet 22 b of the water jacket 22.
  • a cooling water passage 40 which communicates the cooling water outlet 39 with the outlet 22b, and a cooling water passage 40 is provided in the cooling water passage 40.
  • Tat valve (fuel temperature control means) 41 is provided.
  • the thermostat valve 41 always opens and closes a passage opening 40 a communicating with a drain port 22 b of the cooling water passage 40, and constantly biases a valve body 42 to a closed position by a spring 44. It has a schematic structure in which it is driven forward and backward by temperature-sensitive operating elements 43 such as bimetals and thermocouples.
  • the thermostat valve 41 opens the passage opening 40a by the valve body 42 until the temperature of the cooling water from the engine 3 reaches 30 to 40 ° C. Thus, the passage opening 40a is closed.
  • 40 b is a bypass passage that constantly communicates the drain port 2 b and the cooling water passage 40, and a small amount of cooling water always flows.
  • the cooling water A introduced into the water jacket 22 promotes the vaporization of the LFG fuel B flowing into the vaporizer chamber 21.
  • the thermostat valve 41 closes.
  • the temperature of the LPG fuel in the vaporizer chamber 21 is controlled by the thermostat valve 41 so as not to exceed a predetermined value, so that the volume change of the LPG fuel vaporized in the vaporizer chamber 21
  • the ratio can be suppressed. That is, in maintaining the air-fuel ratio within a certain range, it is not necessary to largely correct the amount of fuel to be injected, so that the amount of injected fuel can be easily corrected and the accuracy of the fuel correction can be improved. Can be improved.
  • the water jacket 22 has a vaporizer chamber 2 as shown in FIGS. 1 includes an outer peripheral water jacket 46 surrounding the outer peripheral surface and a rear water jacket 47 covering the rear surface of the gas analyzer chamber 21.
  • the rear water jacket 47 is divided into right and left by partition ribs 48 when viewed from the rear as shown in FIG.
  • the water outlet 22a is located at the lower end of the left water jacket 47b, and the water outlet 22b is located at the lower end of the right water jacket 47a.
  • the drain b is adjacent to the partition rib 48.
  • a pair of guide ribs 50 and 49 extending along partition ribs 48 are formed on the left and right monitor jackets 47b and 47a.
  • the cooling water A flowing into the left jacket 47 b from the water outlet 22 a rises between the guide ribs 50 and the communication passage 5 formed at the upper end of the partition rib 48. From 1 flows into the water jacket 47a on the right side, and then descends between the guide ribs 49 and is discharged from the drain port 22b. In this way, the entire area of the left and right water jackets 47b, 47a can be distributed evenly.
  • the outer peripheral water jacket 46 is divided into left and right sides by a partition wall 48 when viewed from the rear, the left water jacket 46 b communicates with the water inlet 22 a, and the right water jacket The jacket 46a communicates with the drain 22b.
  • the cooling water A flowing into the left jacket 46 b from the water outlet 22 a flows into the right water jacket 46 a from the communication passage 51, and is discharged from the drain 22 b. It is. In this way, the entire area of the left and right outer jackets 46b and 46a can be distributed evenly.
  • the left side wall of the housing body 20a is formed with a through hole 20c that communicates with the lower surface 21a of the vaporizer chamber 21.
  • the fuel level sensor described above is formed in the through hole 20c. 18 is inserted and screwed.
  • the fuel level sensor 18 is of an optical type. As shown in FIGS. 8 and 9, a conical sensing portion 18b is attached to the tip of the sensor body 18a, and The light-emitting portion 18c and the light-receiving portion 18d are arranged in the main body 18a. Since the optical fuel level sensor 18 has no electrical contact, stable detection accuracy can be obtained.
  • the fuel level sensor is not limited to the optical type, but may be an electric type or a float type.
  • the sensing section 18b when the sensing section 18b is in the air, light emitted from the light emitting section 18c is reflected by the sensing section 18b and is incident on the light receiving section 18d. Also, when the fuel reaches the sensing portion 18b, the light from the light emitting portion 18c has the property of transmitting the fuel, and thereby the presence or absence of the liquid fuel is detected. .
  • the fuel level sensor 18 is arranged so that its axis C is obliquely upward with respect to the liquid level (horizontal plane) D. Specifically, the sensing unit 18b is arranged so as to be obliquely upward with an inclination angle ⁇ of about 5 degrees. The upper part of the sensing portion 18b is covered with the fuel avoidance lip 36. The liquid fuel scattered in the vaporizer chamber 21 returns to the lower surface 21a through the upper surface of the fuel avoidance rib 36 and the inner peripheral surface of the vaporizer chamber 21. There is almost no direct impact on the sensing part 18 b of the bell sensor 18.
  • the engine cooling water A is supplied to the outer water jacket 46 and the rear water jacket 47 through the cooling water inlet 38 and the water inlet 22a, and flows through the water jackets 46 and 47. From the outlet 1 b to the cooling water outlet 39.
  • the LFG fuel B flowing in from the fuel inlet 25 flows into the vaporizer chamber 21 through the fuel introduction passage 30 and is radially dispersed and diffused by the dispersion promoting ribs 35 to promote vaporization.
  • the gasified fuel flows out of the fuel outlet 26 through the fuel outlet passage 32 and is supplied to the pressure regulator 16.
  • the liquid fuel B scattered in the vaporizer chamber 2 1 is used to avoid the upper surface of the fuel avoidance rib 36 and the vaporizer chamber 2 1. It returns to the lower surface part 21a along the inner peripheral surface of. Then, when the liquid level D of the liquid fuel B reaches a height higher than the sensing portion 18b of the fuel level sensor 18, a fuel detection signal is output. Also, when the liquid level D drops below the sensor 18b due to the vaporization of the liquid fuel accumulated in the lower surface 21a, the fuel detection signal is released.
  • the liquid fuel a attached to the upper surface portion (the portion shown by oblique lines in FIG. 8) of the sensor body 18a is It flows down the left side of the figure along the slope of 18a, and it does not drop down to the sensing 3 ⁇ 45 18b side, and the liquid fuel does not cover the sensing part 18b.
  • the fuel level sensor 18 is disposed so that the sensor main body 18a is obliquely upward with respect to the fuel level D of the fuel. Liquid fuel adhering to the sensor does not flow to the sensing portion 18b side, and malfunction can be prevented.
  • the sensing part 18b of the fuel level sensor 18 is covered with the fuel avoiding rib 36, even if the LPG fuel flowing into the vaporizer chamber 21 scatters, it does not directly fall on the sensing part 18b. Therefore, malfunction can be prevented from this point.
  • dispersion promoting ribs 35 are formed in the vaporizer chamber 21 in a radial shape, the dispersion promoting ribs 35 promote the dispersion and diffusion of the fuel, thereby accelerating the vaporization of the fuel. be able to.
  • the water jackets 46 and 4.7 are formed on the outer peripheral portion and the rear side portion of the vaporizer chamber 21, and the water jackets 46 and 47 are formed on the left and right by partition ribs 48.
  • the cooling water A supplied to each of the right water jackets 46 b and 47 b flows efficiently to the entire area by flowing the cooling water A to the left overnight jackets 46 a and 47 a. And the fuel vaporization can be further promoted.
  • the cooling water inlet 22a and outlet 22b are arranged close to the lower end of the partition rib 48, the inlet and outlet 22a and 22b can have a compact structure. You.
  • the inclination angle 0 of the fuel level sensor 18 is set to about 5 degrees, but the present invention is not limited to this, and the inclination angle may be further increased. In some cases, it is also possible to dispose the sensing section almost directly above. The point is that the tilt angle is set so that the liquid fuel adhering to the sensor body does not drop onto the sensing part.
  • the liquid LPG fuel flowing into the vaporizer reaches a certain level or more without being vaporized and remaining in a liquid state. Then, the state is sensed by the fuel level sensor. For example, the supply of the liquid LPG fuel into the vaporizer chamber is temporarily stopped so that the liquid LPG fuel level does not become higher than a certain level. It can be prevented from being supplied to the engine as it is. As a result, variations in the air-fuel ratio and an increase in unburned exhaust gas can be prevented.
  • the fuel temperature control means for controlling the temperature of the LPG fuel in the vaporizer is provided so that the temperature of the LPG fuel in the vaporizer does not become higher than a predetermined value.
  • a predetermined value it is possible to suppress the volume change rate of the fuel, that is, to maintain the air-fuel ratio within a certain range, it is not necessary to largely correct the amount of fuel to be injected, and to easily correct the amount of injected fuel. And the accuracy of the fuel correction can be improved.
  • the fuel level sensor is disposed so as to be inclined obliquely upward with the sensing unit side being high, so that the liquid fuel attached to the surface of the fuel level sensor flows to the opposite side of the sensing unit, and It is almost impossible for fuel to droop on the sensing part and cover the surface, preventing malfunction.
  • the fuel avoiding rib prevents the LPG fuel flowing into the vaporizer chamber from directly touching the sensor, so that the liquid fuel scattered in the vaporizer chamber hardly falls on the sensor. This also prevents malfunction.
  • the dispersion and diffusion of the fuel are promoted by each dispersion promoting rib, and the vaporization of the fuel is accelerated. Can be.
  • the cooling water flowing through one of the water jackets is caused to flow to the other water jacket to thereby cool the water jacket.
  • Water can be efficiently circulated, and fuel can be vaporized reliably. Since the cooling water inlet and outlet are arranged close to each other, the inlet and outlet can be made compact.

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)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

Cette invention se rapporte à un appareil d'alimentation en carburant gazeux, qui sert à vaporiser du carburant GPL (B) dans un réservoir de carburant (2) via un vaporisateur (15) et à alimenter ainsi un moteur à combustion interne. Dans cet appareil, un capteur de niveau de carburant (18) destiné à détecter la présence de carburant GPL liquide (B) s'écoulant dans le vaporisateur (15) est disposé de telle sorte que sa partie de détection (18b) soit orientée obliquement vers le haut à partir du niveau du liquide (D).
PCT/JP2002/000481 2001-04-04 2002-01-23 Appareil d'alimentation en carburant gazeux WO2002081896A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001105962A JP2002303212A (ja) 2001-04-04 2001-04-04 ガス燃料供給装置
JP2001-105962 2001-04-04

Publications (1)

Publication Number Publication Date
WO2002081896A1 true WO2002081896A1 (fr) 2002-10-17

Family

ID=18958559

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/000481 WO2002081896A1 (fr) 2001-04-04 2002-01-23 Appareil d'alimentation en carburant gazeux

Country Status (3)

Country Link
JP (1) JP2002303212A (fr)
CN (1) CN1462336A (fr)
WO (1) WO2002081896A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008019819A (ja) * 2006-07-14 2008-01-31 Nikki Co Ltd ガス燃料エンジンのベーパライザ
WO2011040207A1 (fr) * 2009-09-30 2011-04-07 株式会社ケーヒン Dispositif de chauffage de carburant gpl et soupape de réduction de pression pour carburant gpl
KR101333606B1 (ko) 2007-05-09 2013-11-27 가부시키가이샤 닛키 가스 엔진의 베이퍼라이저

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4494200B2 (ja) * 2004-12-28 2010-06-30 トヨタ自動車株式会社 加圧ポンプ付き高圧流体容器構造
FR2913252B1 (fr) * 2007-03-01 2009-04-17 Gurtner Sa Sa Dispositif de vaporisation et de detente d'un gaz de petrole liquefie pour moteur a combustion interne, notamment de vehicule automobile
US20110091286A1 (en) * 2009-10-15 2011-04-21 Van Atta Colby F Scuba diving trim and position control device and method of use
WO2013058718A2 (fr) * 2011-10-18 2013-04-25 G - 1 d.o.o. Dispositif de préparation de gaz de pétrole liquéfié destiné à être dosé dans un moteur à combustion interne
JP5875062B2 (ja) * 2011-11-01 2016-03-02 株式会社ケーヒン Ｌｐｇ燃料用減圧弁
CN105673260A (zh) * 2016-03-29 2016-06-15 成都科力夫科技有限公司 一种用于双燃料汽车的供气方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53108104A (en) * 1977-03-03 1978-09-20 Toyota Motor Corp Device for gasification of luquefied petroleum gas fuel
JPS55117057A (en) * 1979-03-02 1980-09-09 Nissan Motor Co Ltd Carburetion accelerating device for liquefied gas engine
JPH02119962U (fr) * 1989-03-14 1990-09-27
JPH0893570A (ja) * 1994-09-28 1996-04-09 Nissan Diesel Motor Co Ltd ガスエンジンのレギュレータの保温装置
JPH08303304A (ja) * 1995-05-01 1996-11-19 Aisan Ind Co Ltd Ｌｐｇ燃料加熱装置
JPH11236855A (ja) * 1998-02-20 1999-08-31 Mitsubishi Heavy Ind Ltd 液体燃料の気化装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53108104A (en) * 1977-03-03 1978-09-20 Toyota Motor Corp Device for gasification of luquefied petroleum gas fuel
JPS55117057A (en) * 1979-03-02 1980-09-09 Nissan Motor Co Ltd Carburetion accelerating device for liquefied gas engine
JPH02119962U (fr) * 1989-03-14 1990-09-27
JPH0893570A (ja) * 1994-09-28 1996-04-09 Nissan Diesel Motor Co Ltd ガスエンジンのレギュレータの保温装置
JPH08303304A (ja) * 1995-05-01 1996-11-19 Aisan Ind Co Ltd Ｌｐｇ燃料加熱装置
JPH11236855A (ja) * 1998-02-20 1999-08-31 Mitsubishi Heavy Ind Ltd 液体燃料の気化装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008019819A (ja) * 2006-07-14 2008-01-31 Nikki Co Ltd ガス燃料エンジンのベーパライザ
KR101333606B1 (ko) 2007-05-09 2013-11-27 가부시키가이샤 닛키 가스 엔진의 베이퍼라이저
WO2011040207A1 (fr) * 2009-09-30 2011-04-07 株式会社ケーヒン Dispositif de chauffage de carburant gpl et soupape de réduction de pression pour carburant gpl
KR101307034B1 (ko) * 2009-09-30 2013-09-11 가부시키가이샤게힌 Ｌｐｇ 연료용 가열 장치 및 ｌｐｇ 연료용 감압 밸브

Also Published As

Publication number Publication date
CN1462336A (zh) 2003-12-17
JP2002303212A (ja) 2002-10-18

Similar Documents

Publication Publication Date Title
US8151779B1 (en) Control device of an internal combustion engine
KR20160045598A (ko) 증발 연료 퍼지 시스템
ES2287848T3 (es) Sistema de alimentaci0n de combustible.
ES2240188T3 (es) Valvula de recirculacion de retorno de combustible y eliminacion de aire.
WO2009107598A1 (fr) Dispositif de mesure de pression de vapeur de carburant
WO2002081896A1 (fr) Appareil d'alimentation en carburant gazeux
US5284121A (en) Internal combustion engine with evaporated fuel purge system
MXPA05010716A (es) Sistema de detección de fallas y control de calentamiento capilar y metodología para un sistema de alimentación de combustible de un motor de combustión interna.
US6029629A (en) Constant fuel-pump-inlet pressure system
US7114491B2 (en) Fuel supply apparatus and vapor separator in outboard engine
SE514161C2 (sv) Sätt och anordning för övervakning och styrning av en med pulsförbränning arbetande värmegenerator
US11085407B2 (en) Fuel supply module and control system
CA2215653C (fr) Dispositif d'alimentation de moteur en carburant
WO2000065221A1 (fr) Dispositif injecteur de propane destine a un moteur diesel
KR900008427B1 (ko) 석유 연소기의 연료 공급장치
WO2002050418A1 (fr) Alimentation en gaz d'un moteur a combustion interne
KR100898204B1 (ko) 엘피아이 연료압력 레귤레이터의 가변제어 방법 및 장치
JP4872969B2 (ja) 燃料タンク装置
EP1752706B1 (fr) Système de générateur de vapeur à chauffage direct
NL2000123C2 (nl) Stelsel voor het injecteren van vloeibare damp.
JP4459119B2 (ja) ガスエンジン用燃料供給装置
RU2315192C2 (ru) Предохранительное устройство для промывочной системы для инжекторов на жидком топливе в газовых турбинах
US6601573B1 (en) Method for detecting failure of a pump assembly in a pump module
JPS62165571A (ja) 燃料噴射装置用圧力制御構造
JP2002323398A (ja) ガス漏洩検知装置及びそのガス漏洩検知装置を備えた液化ガス供給装置

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CN US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 028014189

Country of ref document: CN

122 Ep: pct application non-entry in european phase