JP2008286132A - Fuel supply method and device for marine internal combustion engine - Google Patents

Fuel supply method and device for marine internal combustion engine Download PDF

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JP2008286132A
JP2008286132A JP2007133094A JP2007133094A JP2008286132A JP 2008286132 A JP2008286132 A JP 2008286132A JP 2007133094 A JP2007133094 A JP 2007133094A JP 2007133094 A JP2007133094 A JP 2007133094A JP 2008286132 A JP2008286132 A JP 2008286132A
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fuel
fuel tank
tank
extracted
level
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JP4893466B2 (en
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Yoshiyuki Saito
吉之 齋藤
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IHI Corp
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IHI Corp
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Priority to KR1020097023508A priority patent/KR101067267B1/en
Priority to CN2008800164466A priority patent/CN101678887B/en
Priority to EP08738590.2A priority patent/EP2157014A4/en
Priority to MYPI20094845 priority patent/MY151142A/en
Priority to PCT/JP2008/000984 priority patent/WO2008142826A1/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/14—Use of propulsion power plant or units on vessels the vessels being motor-driven relating to internal-combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/16—Use of propulsion power plant or units on vessels the vessels being motor-driven relating to gas turbines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
    • F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
    • 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
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0064—Layout or arrangement of systems for feeding fuel for engines being fed with multiple fuels or fuels having special properties, e.g. bio-fuels; varying the fuel composition
    • 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
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/007—Layout or arrangement of systems for feeding fuel characterised by its use in vehicles, in stationary plants or in small engines, e.g. hand held tools
    • 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
    • F02M37/0076—Details of the fuel feeding system related to the fuel tank
    • F02M37/0088—Multiple separate fuel tanks or tanks being at least partially partitioned

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel supply method and device for a marine internal combustion engine capable of avoiding a great quantity of hard particle from entering an engine and preventing seizure of a piston ring against a cylinder liner. <P>SOLUTION: Fuel is taken out from fuel tanks 1, 2, 3 in an order by outputting change over signal 4a to a channel change over means 4 of a fuel supply line 5 from a controller 9 based on detection signal 6a, 7a, 8a from level detectors 6, 7, 8. When fuel level of the fuel tank 1 (or 2) from which fuel is taken out reduces to a set value or lower based on detection signal 6a (or 7a) from the level detector 6 (or 7), take-out of fuel from the next fuel tank 2 (or 3) is started. At least fuel from the fuel tank 1 (or 2) and fuel from the next fuel tank 2 (or 3) are mixed to enable supply into each cylinder 11 of an engine 10 under a condition where hard particle concentration in the fuel is reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、舶用内燃機関の燃料供給方法及び装置に関するものである。   The present invention relates to a fuel supply method and apparatus for a marine internal combustion engine.

一般に、舶用内燃機関においては、燃料タンク内に貯留された燃料を燃料ポンプにより圧送し、燃料噴射弁を介してエンジンの各気筒内に供給するようになっている。   Generally, in a marine internal combustion engine, fuel stored in a fuel tank is pumped by a fuel pump and supplied into each cylinder of the engine via a fuel injection valve.

尚、舶用内燃機関の燃料供給に関する一般的技術水準を示すものとしては、例えば、特許文献１がある。
特開２００４−３０８５２８号公報 In addition, there exists patent document 1 as what shows the general technical level regarding the fuel supply of a ship internal combustion engine, for example.
JP 2004-308528 A

しかしながら、燃料中には、該燃料の改質用触媒として利用されたアルミナやシリカ等のセラミックス系の硬質粒子が含まれているため、燃料タンク内に貯留された燃料が減少した際に、該燃料を燃料タンクの底部から抜き出すと、該燃料タンクの底部に沈殿した高濃度の硬質粒子も燃料と一緒に抜き出される形となり、該硬質粒子は燃料清浄機やフィルタでは除去しきれず、エンジンに大量に入り込み、シリンダライナに対するピストンリングの焼付きが生じるという欠点を有していた。   However, since the fuel contains ceramic hard particles such as alumina and silica that are used as a catalyst for reforming the fuel, when the fuel stored in the fuel tank decreases, the fuel When fuel is extracted from the bottom of the fuel tank, high-concentration hard particles that have settled at the bottom of the fuel tank are also extracted together with the fuel, and the hard particles cannot be completely removed by a fuel purifier or a filter. There was a drawback that the piston ring seized into the cylinder liner due to a large amount of penetration.

本発明は、斯かる実情に鑑み、硬質粒子がエンジンに大量に入り込むことを回避し得、シリンダライナに対するピストンリングの焼付きを防止し得る舶用内燃機関の燃料供給方法及び装置を提供しようとするものである。   In view of such circumstances, the present invention intends to provide a fuel supply method and apparatus for a marine internal combustion engine that can prevent a large amount of hard particles from entering the engine and prevent seizure of the piston ring against the cylinder liner. Is.

本発明は、燃料タンク内に貯留された燃料を底部から抜き出して燃料ポンプにより圧送し、燃料噴射弁を介してエンジンの各気筒内に供給する舶用内燃機関の燃料供給方法において、
燃料が満たされた複数の燃料タンクを備え、各燃料タンクから順次燃料の抜き出しを行うようにし、抜き出しが行われている燃料タンクの燃料レベルが設定値以下に減少した際、前記燃料レベルが設定値以下に減少した燃料タンクから抜き出される燃料と前記次の燃料タンクから抜き出される燃料とを少なくとも混ぜ、燃料中に含まれる硬質粒子濃度を低下させた状態でエンジンの各気筒内に供給することを特徴とする舶用内燃機関の燃料供給方法にかかるものである。 The present invention relates to a fuel supply method for a marine internal combustion engine, in which fuel stored in a fuel tank is extracted from the bottom, pumped by a fuel pump, and supplied to each cylinder of the engine via a fuel injection valve.
Provided with a plurality of fuel tanks filled with fuel, fuel is sequentially extracted from each fuel tank, and the fuel level is set when the fuel level of the fuel tank being extracted decreases below the set value. At least the fuel extracted from the fuel tank reduced to a value below the fuel extracted from the next fuel tank is mixed and supplied to each cylinder of the engine in a state where the concentration of hard particles contained in the fuel is reduced. The present invention relates to a fuel supply method for a marine internal combustion engine.

前述の如く構成すると、燃料が満たされた複数の燃料タンクから順次燃料の抜き出しが行われ、抜き出しが行われている燃料タンクの燃料レベルが設定値以下に減少した際には、前記燃料レベルが設定値以下に減少した燃料タンクから抜き出される燃料と前記次の燃料タンクから抜き出される燃料とが少なくとも混ぜられ、燃料中に含まれる硬質粒子濃度を低下させた状態でエンジンの各気筒内に燃料の供給が行われる。   When configured as described above, fuel is sequentially extracted from a plurality of fuel tanks filled with fuel, and when the fuel level of the fuel tank from which the fuel is being extracted decreases below a set value, the fuel level is reduced. The fuel extracted from the fuel tank reduced to a set value or less and the fuel extracted from the next fuel tank are mixed at least, and the concentration of hard particles contained in the fuel is reduced in each cylinder of the engine. Fuel is supplied.

この結果、硬質粒子がエンジンに大量に入り込むことがなくなり、シリンダライナに対するピストンリングの焼付きが生じなくなる。   As a result, hard particles do not enter the engine in large quantities, and seizure of the piston ring against the cylinder liner does not occur.

前記舶用内燃機関の燃料供給方法においては、前記燃料レベルが設定値以下に減少した燃料タンクから抜き出される燃料を次の燃料タンクの上部に導入しつつ、該次の燃料タンクの底部から燃料を抜き出すようにすることができる。   In the fuel supply method for a marine internal combustion engine, the fuel extracted from the fuel tank whose fuel level has decreased below a set value is introduced into the upper part of the next fuel tank, and the fuel is supplied from the bottom of the next fuel tank. Can be extracted.

前記舶用内燃機関の燃料供給方法においては、前記燃料レベルが設定値以下に減少した燃料タンクと、次の燃料タンクとから一定時間間隔で交互に燃料を抜き出し、該燃料を下流側に配置されるセットリングタンクで混ぜるようにすることもできる。   In the fuel supply method for a marine internal combustion engine, fuel is alternately extracted at a predetermined time interval from a fuel tank whose fuel level has decreased below a set value and the next fuel tank, and the fuel is disposed downstream. It can also be mixed in a settling tank.

前記舶用内燃機関の燃料供給方法においては、前記燃料レベルが設定値以下に減少した燃料タンクと、次の燃料タンクとから同時に燃料を抜き出すようにしても良い。   In the fuel supply method for a marine internal combustion engine, fuel may be extracted simultaneously from a fuel tank whose fuel level has decreased below a set value and a next fuel tank.

前記舶用内燃機関の燃料供給方法においては、前記燃料レベルが設定値以下に減少した燃料タンクから抜き出される燃料を次の燃料タンクの上部に導入した後、該次の燃料タンクの底部から燃料を抜き出すようにすることもできる。   In the fuel supply method for a marine internal combustion engine, after the fuel extracted from the fuel tank whose fuel level has decreased below a set value is introduced into the upper part of the next fuel tank, the fuel is supplied from the bottom of the next fuel tank. It can also be extracted.

一方、本発明は、燃料タンク内に貯留された燃料を底部から抜き出して燃料ポンプにより圧送し、燃料噴射弁を介してエンジンの各気筒内に供給する舶用内燃機関の燃料供給装置において、
燃料が満たされた複数の燃料タンクと、
該各燃料タンクから順次燃料を抜き出し可能となるよう流路切換手段が配設された燃料供給ラインと、
前記各燃料タンクの燃料レベルを検出するレベル検出器と、
前記各燃料タンクから順次燃料の抜き出しを行い、抜き出しが行われている燃料タンクの燃料レベルが前記レベル検出器からの検出信号に基づいて設定値以下に減少した際、前記燃料レベルが設定値以下に減少した燃料タンクから抜き出される燃料と前記次の燃料タンクから抜き出される燃料とを少なくとも混ぜ、燃料中に含まれる硬質粒子濃度を低下させた状態でエンジンの各気筒内に供給可能となるよう前記燃料供給ラインの流路切換手段に切換信号を出力する制御器と
を備えたことを特徴とする舶用内燃機関の燃料供給装置にかかるものである。 On the other hand, the present invention is a fuel supply device for a marine internal combustion engine that extracts fuel stored in a fuel tank from the bottom, pumps it with a fuel pump, and supplies the fuel into each cylinder of the engine via a fuel injection valve.
A plurality of fuel tanks filled with fuel;
A fuel supply line provided with flow path switching means so that fuel can be sequentially extracted from each fuel tank;
A level detector for detecting the fuel level of each fuel tank;
The fuel is sequentially extracted from each fuel tank, and when the fuel level of the fuel tank from which the fuel is being extracted is reduced below a set value based on a detection signal from the level detector, the fuel level is below the set value. At least the fuel extracted from the fuel tank that has been reduced to the next fuel tank and the fuel extracted from the next fuel tank can be mixed and supplied to each cylinder of the engine in a state where the concentration of hard particles contained in the fuel is reduced. And a controller that outputs a switching signal to the flow path switching means of the fuel supply line.

該舶用内燃機関の燃料供給装置の場合、燃料が満たされた複数の燃料タンクから燃料供給ラインを経て順次燃料が抜き出され、レベル検出器によって前記燃料タンクの燃料レベルが検出され、前記抜き出しが行われている燃料タンクの燃料レベルが前記レベル検出器からの検出信号に基づいて設定値以下に減少した際には、制御器から前記燃料供給ラインの流路切換手段に切換信号が出力され、前記燃料レベルが設定値以下に減少した燃料タンクから抜き出される燃料と前記次の燃料タンクから抜き出される燃料とが少なくとも混ぜられ、燃料中に含まれる硬質粒子濃度を低下させた状態でエンジンの各気筒内に燃料の供給が行われる。   In the case of the fuel supply device for a marine internal combustion engine, fuel is sequentially extracted from a plurality of fuel tanks filled with fuel through a fuel supply line, the fuel level of the fuel tank is detected by a level detector, and the extraction is performed. When the fuel level of the fuel tank being performed decreases below the set value based on the detection signal from the level detector, a switching signal is output from the controller to the flow path switching means of the fuel supply line, The fuel withdrawn from the fuel tank whose fuel level has decreased below a set value and the fuel withdrawn from the next fuel tank are mixed at least, and the hard particle concentration contained in the fuel is lowered to reduce the concentration of the engine. Fuel is supplied into each cylinder.

この結果、硬質粒子がエンジンに大量に入り込むことがなくなり、シリンダライナに対するピストンリングの焼付きが生じなくなる。   As a result, hard particles do not enter the engine in large quantities, and seizure of the piston ring against the cylinder liner does not occur.

前記舶用内燃機関の燃料供給装置においては、前記燃料供給ラインを、
前記各燃料タンクの底部と燃料ポンプとをつなぐ抜出ラインと、
該抜出ラインから分岐して設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクの燃料を次の燃料タンクの上部へ導入するための迂回ラインと
から構成すると共に、
前記流路切換手段を、
前記抜出ラインと迂回ラインとの分岐部に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクの燃料を抜出ライン側から迂回ライン側へ導くよう切換可能な三方弁と、
前記迂回ライン途中に設けられ且つ前記三方弁の切換により抜出ライン側から迂回ライン側へ導かれる燃料を次の燃料タンクの上部へ圧送するための補助ポンプと、
該補助ポンプより下流側における迂回ライン途中に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクの燃料を次の燃料タンクへ導入するよう切換可能な混合切換弁と、
前記燃料タンクのうち最後に燃料が抜き出される燃料タンクの底部に接続した抜出ライン途中に設けられ且つ該燃料タンクから最後に燃料が抜き出される際に開かれる抜出弁と
から構成することができる。 In the fuel supply device for a marine internal combustion engine, the fuel supply line is
An extraction line connecting the bottom of each fuel tank and the fuel pump;
A detour line for branching from the extraction line and for introducing the fuel in the fuel tank whose fuel level is reduced below a set value to the upper part of the next fuel tank,
The flow path switching means,
A three-way valve provided at a branch portion between the extraction line and the bypass line and switchable to guide the fuel in the fuel tank whose fuel level is reduced below a set value from the extraction line side to the bypass line side;
An auxiliary pump that is provided in the middle of the bypass line and that pumps fuel guided from the extraction line side to the bypass line side by switching the three-way valve to the upper part of the next fuel tank;
A mixing switching valve which is provided in the middle of a bypass line downstream of the auxiliary pump and which can be switched so as to introduce the fuel of the fuel tank whose fuel level is reduced below a set value into the next fuel tank;
An extraction valve provided in the middle of the extraction line connected to the bottom of the fuel tank from which fuel is finally extracted from the fuel tank and opened when fuel is finally extracted from the fuel tank; Can do.

前記舶用内燃機関の燃料供給装置においては、前記燃料供給ラインを、
前記各燃料タンクの底部と燃料ポンプとをつなぐ抜出ラインから構成すると共に、
前記流路切換手段を、
前記各燃料タンクの底部に接続した抜出ライン途中に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクと次の燃料タンクとから一定時間間隔で交互に燃料を抜き出し、該燃料を下流側に配置されるセットリングタンクで混ぜるよう開閉制御される抜出弁から構成することもできる。 In the fuel supply device for a marine internal combustion engine, the fuel supply line is
Comprising a withdrawal line connecting the bottom of each fuel tank and the fuel pump;
The flow path switching means,
The fuel is alternately extracted at regular time intervals from the fuel tank and the next fuel tank which are provided in the middle of the extraction line connected to the bottom of each fuel tank and whose fuel level has decreased below a set value, and the fuel is taken downstream. It can also be constituted by an extraction valve which is controlled to be opened and closed so as to be mixed in a settling tank arranged on the side.

前記舶用内燃機関の燃料供給装置においては、前記燃料供給ラインを、
前記各燃料タンクの底部と燃料ポンプとをつなぐ抜出ラインから構成すると共に、
前記流路切換手段を、
前記各燃料タンクの底部に接続した抜出ライン途中に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクと次の燃料タンクとから同時に燃料を抜き出すよう開閉制御される抜出弁から構成しても良い。 In the fuel supply device for a marine internal combustion engine, the fuel supply line is
Comprising a withdrawal line connecting the bottom of each fuel tank and the fuel pump;
The flow path switching means,
It comprises a withdrawal valve provided in the middle of the withdrawal line connected to the bottom of each fuel tank and controlled to be opened and closed so that fuel is withdrawn from the next fuel tank at the same time as the fuel level is reduced below a set value. You may do it.

前記舶用内燃機関の燃料供給装置においては、前記燃料供給ラインを、
前記各燃料タンクの底部と燃料ポンプとをつなぐ抜出ラインと、
該抜出ラインの燃料ポンプより下流側から分岐して設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクの燃料を次の燃料タンクの上部へ導入するための迂回ラインと
から構成すると共に、
前記流路切換手段を、
前記各燃料タンクの底部に接続した抜出ライン途中に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクから燃料を抜き出した後、次の燃料タンクの底部から燃料を抜き出すよう開閉制御される抜出弁と、
前記抜出ラインと迂回ラインとの分岐部に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクの燃料を抜出ライン側から迂回ライン側へ導くよう切換可能な三方弁と、
該三方弁より下流側における迂回ライン途中に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクの燃料を次の燃料タンクの上部へ導入した後、次の燃料タンクの底部から抜き出される燃料を同じ燃料タンクの上部へ導入するよう切換可能な混合切換弁と
から構成することもできる。 In the fuel supply device for a marine internal combustion engine, the fuel supply line is
An extraction line connecting the bottom of each fuel tank and the fuel pump;
And a detour line for branching from the downstream side of the fuel pump of the extraction line and for introducing the fuel in the fuel tank whose fuel level is reduced below a set value to the upper part of the next fuel tank. ,
The flow path switching means,
Opening / closing control is performed so that fuel is extracted from the fuel tank provided in the extraction line connected to the bottom of each fuel tank and whose fuel level has decreased below a set value, and then extracted from the bottom of the next fuel tank. An extraction valve,
A three-way valve provided at a branch portion between the extraction line and the bypass line and switchable to guide the fuel in the fuel tank whose fuel level is reduced below a set value from the extraction line side to the bypass line side;
The fuel in the fuel tank provided in the detour line on the downstream side of the three-way valve and having the fuel level decreased below the set value is introduced into the upper part of the next fuel tank, and then extracted from the bottom of the next fuel tank. It can also consist of a mixing switching valve that can be switched to introduce fuel into the upper part of the same fuel tank.

本発明の舶用内燃機関の燃料供給方法及び装置によれば、硬質粒子がエンジンに大量に入り込むことを回避し得、シリンダライナに対するピストンリングの焼付きを防止し得るという優れた効果を奏し得る。   According to the fuel supply method and apparatus for a marine internal combustion engine of the present invention, it is possible to avoid a large amount of hard particles from entering the engine, and to obtain an excellent effect of preventing seizure of the piston ring against the cylinder liner.

以下、本発明の実施の形態を添付図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the accompanying drawings.

図１は本発明を実施する形態の第一例であって、燃料が満たされた複数（図１の例では三個）の燃料タンク１，２，３を設置し、該各燃料タンク１，２，３の底部に、順次燃料を抜き出し可能となるよう流路切換手段４が配設された燃料供給ライン５を接続すると共に、前記各燃料タンク１，２，３に、燃料レベルを検出するレベル検出器６，７，８を設け、該レベル検出器６，７，８からの検出信号６ａ，７ａ，８ａに基づいて制御器９から前記燃料供給ライン５の流路切換手段４に切換信号４ａを出力することにより、前記各燃料タンク１，２，３から順次燃料の抜き出しを行い、抜き出しが行われている燃料タンク１（又は２）の燃料レベルが前記レベル検出器６（又は７）からの検出信号６ａ（又は７ａ）に基づいて設定値以下に減少した際、次の燃料タンク２（又は３）からの燃料の抜き出しを開始し、前記燃料レベルが設定値以下に減少した燃料タンク１（又は２）から抜き出される燃料と前記次の燃料タンク２（又は３）から抜き出される燃料とを少なくとも混ぜ、燃料中に含まれる硬質粒子濃度を低下させた状態でエンジン１０の各気筒１１内に供給可能となるようよう構成したものである。   FIG. 1 is a first example of an embodiment of the present invention. A plurality of (three in the example of FIG. 1) fuel tanks 1, 2, and 3 filled with fuel are installed. Connected to the bottoms of the fuel tanks 2 and 3 are fuel supply lines 5 provided with flow path switching means 4 so that the fuel can be sequentially extracted, and the fuel levels of the fuel tanks 1, 2 and 3 are detected. Level detectors 6, 7, 8 are provided, and a switching signal is sent from the controller 9 to the flow path switching means 4 of the fuel supply line 5 based on the detection signals 6 a, 7 a, 8 a from the level detectors 6, 7, 8. By outputting 4a, fuel is sequentially extracted from each of the fuel tanks 1, 2, and 3, and the fuel level of the fuel tank 1 (or 2) from which the fuel is being extracted is detected by the level detector 6 (or 7). Based on the detection signal 6a (or 7a) from In this case, the extraction of the fuel from the next fuel tank 2 (or 3) is started, the fuel extracted from the fuel tank 1 (or 2) whose fuel level has decreased below a set value and the next fuel tank 2 The fuel extracted from (or 3) is mixed at least so that it can be supplied into each cylinder 11 of the engine 10 in a state in which the concentration of hard particles contained in the fuel is reduced.

本図示例の場合、前記燃料供給ライン５は、前記各燃料タンク１，２，３の底部と燃料ポンプ１２とをつなぐ抜出ライン１３と、該抜出ライン１３から分岐して設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンク１（又は２）の燃料を次の燃料タンク２（又は３）の上部へ導入するための迂回ライン１４とから構成してある。   In the case of the illustrated example, the fuel supply line 5 is provided with an extraction line 13 that connects the bottom of each of the fuel tanks 1, 2, 3 and the fuel pump 12, a branch from the extraction line 13, and the A detour line 14 is provided for introducing the fuel in the fuel tank 1 (or 2) whose fuel level has decreased below the set value to the upper part of the next fuel tank 2 (or 3).

又、前記流路切換手段４は、前記抜出ライン１３と迂回ライン１４との分岐部に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンク１（又は２）の燃料を抜出ライン１３側から迂回ライン１４側へ導くよう切換可能な三方弁１５（又は１６）と、前記迂回ライン１４途中に設けられ且つ前記三方弁１５（又は１６）の切換により抜出ライン１３側から迂回ライン１４側へ導かれる燃料を次の燃料タンク１，２，３の上部へ圧送するための補助ポンプ１８と、該補助ポンプ１８より下流側における迂回ライン１４途中に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンク１（又は２）の燃料を次の燃料タンク２（又は３）へ導入するよう切換可能な混合切換弁１９，２０と、前記燃料タンク１，２，３のうち最後（図１の例では三番目）に燃料が抜き出される燃料タンク３の底部に接続した抜出ライン１３途中に設けられ且つ該燃料タンク３から最後に燃料が抜き出される際に開かれる抜出弁１７とから構成してある。   The flow path switching means 4 is provided at a branch portion between the extraction line 13 and the detour line 14 and extracts the fuel from the fuel tank 1 (or 2) in which the fuel level has decreased below a set value. A three-way valve 15 (or 16) that can be switched to lead to the detour line 14 side from the 13 side, and a detour line that is provided in the middle of the detour line 14 and is switched from the extraction line 13 side by switching the three-way valve 15 (or 16). The auxiliary pump 18 for pumping the fuel guided to the 14 side to the upper part of the next fuel tank 1, 2, 3, and provided in the detour line 14 on the downstream side of the auxiliary pump 18, and the fuel level is a set value Mixing changeover valves 19 and 20 that can be switched to introduce the fuel of the fuel tank 1 (or 2) reduced below into the next fuel tank 2 (or 3) and the last of the fuel tanks 1, 2 and 3 ( Figure In the example of FIG. 3, an extraction valve 17 provided in the middle of the extraction line 13 connected to the bottom of the fuel tank 3 from which fuel is extracted and opened when the fuel is finally extracted from the fuel tank 3, It is composed of

因みに、前記切換信号４ａは、前記三方弁１５を切り換える切換信号１５ａと、前記三方弁１６を切り換える切換信号１６ａと、前記抜出弁１７を開閉する切換信号１７ａと、前記補助ポンプ１８をオン・オフする切換信号１８ａと、前記混合切換弁１９を開閉する切換信号１９ａと、前記混合切換弁２０を開閉する切換信号２０ａとを有している。   Incidentally, the switching signal 4a includes a switching signal 15a for switching the three-way valve 15, a switching signal 16a for switching the three-way valve 16, a switching signal 17a for opening and closing the extraction valve 17, and an on / off of the auxiliary pump 18. A switching signal 18a for turning off, a switching signal 19a for opening and closing the mixing switching valve 19, and a switching signal 20a for opening and closing the mixing switching valve 20 are provided.

尚、図１中、２１は前記燃料ポンプ１２より下流側における抜出ライン１３途中に設けられたセットリングタンク、２２はセットリングタンク２１内の燃料を圧送するための供給ポンプ、２３は供給ポンプ２２によって圧送される燃料をエンジン１０の気筒１１内に噴射するための燃料噴射弁である。   In FIG. 1, 21 is a settling tank provided in the middle of the extraction line 13 on the downstream side of the fuel pump 12, 22 is a supply pump for pumping fuel in the settling tank 21, and 23 is a supply pump. This is a fuel injection valve for injecting the fuel pumped by 22 into the cylinder 11 of the engine 10.

又、船舶の航行中は燃料の補充が行えないため、前記燃料タンク１，２，３のトータル容量は、一回の航行距離を充分にカバーできる容量とし、最後に燃料が抜き出される燃料タンク３の燃料レベルが設定値以下に減少する前に燃料を補充するものとしてある。   In addition, since the fuel cannot be replenished during the navigation of the ship, the total capacity of the fuel tanks 1, 2 and 3 is set to a capacity that can sufficiently cover a single navigation distance, and the fuel tank from which the fuel is finally extracted. It is assumed that the fuel is replenished before the fuel level of 3 decreases below the set value.

次に、上記図示例の作用を説明する。   Next, the operation of the illustrated example will be described.

本図示例の場合、燃料が満たされた複数の燃料タンク１，２，３のうち先ず、燃料タンク１から燃料供給ライン５の抜出ライン１３を経て燃料が抜き出され、燃料ポンプ１２によりセットリングタンク２１へ圧送され、該セットリングタンク２１内に一旦貯留された燃料が供給ポンプ２２により燃料噴射弁２３へ圧送され、該燃料噴射弁２３からエンジン１０の各気筒１１内に噴射される。   In the case of the illustrated example, the fuel is first extracted from the fuel tank 1 through the extraction line 13 of the fuel supply line 5 among the plurality of fuel tanks 1, 2, 3 filled with fuel and set by the fuel pump 12. The fuel that has been pumped to the ring tank 21 and once stored in the set ring tank 21 is pumped to the fuel injection valve 23 by the supply pump 22 and is injected from the fuel injection valve 23 into each cylinder 11 of the engine 10.

このとき、三方弁１５は制御器９からの切換信号１５ａにより抜出ライン１３側に切り換えられており、三方弁１６は制御器９からの切換信号１６ａにより閉じられ、抜出弁１７は制御器９からの切換信号１７ａにより閉じられ、補助ポンプ１８は制御器９からの切換信号１８ａによりオフの状態とされ、混合切換弁１９は制御器９からの切換信号１９ａにより閉じられ、混合切換弁２０は制御器９からの切換信号２０ａにより閉じられている。   At this time, the three-way valve 15 is switched to the extraction line 13 side by the switching signal 15a from the controller 9, the three-way valve 16 is closed by the switching signal 16a from the controller 9, and the extraction valve 17 is switched to the controller. 9 is closed by the switching signal 17a from the controller 9, the auxiliary pump 18 is turned off by the switching signal 18a from the controller 9, the mixing switching valve 19 is closed by the switching signal 19a from the controller 9, and the mixing switching valve 20 Is closed by a switching signal 20a from the controller 9.

前記燃料タンク１の燃料レベルがレベル検出器６によって検出され、前記抜き出しが行われている燃料タンク１の燃料レベルが前記レベル検出器６からの検出信号６ａに基づいて図１の仮想線で示す如く設定値以下に減少した際には、前記三方弁１５は制御器９からの切換信号１５ａにより抜出ライン１３側から迂回ライン１４側に切り換えられると共に、三方弁１６は制御器９からの切換信号１６ａにより抜出ライン１３側に切り換えられ、補助ポンプ１８は制御器９からの切換信号１８ａによりオンの状態とされ、混合切換弁１９は制御器９からの切換信号１９ａにより開かれ、これにより、次の燃料タンク２からの燃料の抜出ライン１３への抜き出しが開始されつつ、前記燃料レベルが設定値以下に減少した燃料タンク１から抜き出される燃料は、前記オンの状態とされた補助ポンプ１８の作動により迂回ライン１４側へ吸い上げられ、前記開かれた混合切換弁１９を介して次の燃料タンク２の上部へ導入され、該次の燃料タンク２内に貯留された燃料と混ぜられ、底部に高濃度の硬質粒子が沈殿していない燃料タンク２内の燃料が燃料ポンプ１２とセットリングタンク２１と供給ポンプ２２と燃料噴射弁２３とを経てエンジン１０の各気筒１１内に供給される。   The fuel level of the fuel tank 1 is detected by a level detector 6, and the fuel level of the fuel tank 1 being extracted is indicated by a virtual line in FIG. 1 based on a detection signal 6 a from the level detector 6. When the value decreases below the set value as described above, the three-way valve 15 is switched from the extraction line 13 side to the bypass line 14 side by a switching signal 15a from the controller 9, and the three-way valve 16 is switched from the controller 9. The auxiliary pump 18 is turned on by the switching signal 18a from the controller 9, and the mixing switching valve 19 is opened by the switching signal 19a from the controller 9, thereby being switched to the extraction line 13 side by the signal 16a. The fuel is extracted from the fuel tank 1 in which the fuel level is reduced to a set value or less while the extraction of the fuel from the next fuel tank 2 to the extraction line 13 is started. The fuel is sucked up to the detour line 14 side by the operation of the auxiliary pump 18 which is turned on, introduced into the upper portion of the next fuel tank 2 through the opened mixing switching valve 19, and the next The fuel stored in the fuel tank 2 is mixed with the fuel, and the fuel in the fuel tank 2 in which high-concentration hard particles are not precipitated at the bottom is the fuel pump 12, the set ring tank 21, the supply pump 22, and the fuel injection valve 23. After that, it is supplied into each cylinder 11 of the engine 10.

この結果、硬質粒子がエンジン１０に大量に入り込むことがなくなり、シリンダライナに対するピストンリングの焼付きが生じなくなる。   As a result, hard particles do not enter the engine 10 in large quantities, and seizure of the piston ring against the cylinder liner does not occur.

尚、前記燃料タンク１が空になった場合には、前記三方弁１５は制御器９からの切換信号１５ａにより閉じられると共に、補助ポンプ１８は制御器９からの切換信号１８ａによりオフの状態とされ、混合切換弁１９は制御器９からの切換信号１９ａにより閉じられ、前記燃料タンク２の底部からの燃料の抜き出しが継続して行われる。   When the fuel tank 1 becomes empty, the three-way valve 15 is closed by a switching signal 15a from the controller 9, and the auxiliary pump 18 is turned off by a switching signal 18a from the controller 9. The mixing switching valve 19 is closed by the switching signal 19a from the controller 9, and the fuel is continuously extracted from the bottom of the fuel tank 2.

この後、前記燃料タンク２の燃料レベルがレベル検出器７によって検出され、前記抜き出しが行われている燃料タンク２の燃料レベルが前記レベル検出器７からの検出信号７ａに基づいて設定値以下に減少した際には、前記三方弁１６は制御器９からの切換信号１６ａにより抜出ライン１３側から迂回ライン１４側に切り換えられると共に、抜出弁１７は制御器９からの切換信号１７ａにより開かれ、補助ポンプ１８は制御器９からの切換信号１８ａにより再度オンの状態とされ、混合切換弁２０は制御器９からの切換信号２０ａにより開かれ、これにより、次の燃料タンク３からの燃料の抜出ライン１３への抜き出しが開始されつつ、前記燃料レベルが設定値以下に減少した燃料タンク２から抜き出される燃料は、前記オンの状態とされた補助ポンプ１８の作動により迂回ライン１４側へ吸い上げられ、前記開かれた混合切換弁２０を介して次の燃料タンク３の上部へ導入され、該次の燃料タンク２内に貯留された燃料と混ぜられ、底部に高濃度の硬質粒子が沈殿していない燃料タンク３内の燃料が燃料ポンプ１２とセットリングタンク２１と供給ポンプ２２と燃料噴射弁２３とを経てエンジン１０の各気筒１１内に供給されるため、硬質粒子がエンジン１０に大量に入り込んでシリンダライナに対するピストンリングの焼付きが生じる心配はない。   Thereafter, the fuel level of the fuel tank 2 is detected by the level detector 7, and the fuel level of the fuel tank 2 from which the fuel tank 2 has been withdrawn is set below the set value based on the detection signal 7a from the level detector 7. When it decreases, the three-way valve 16 is switched from the extraction line 13 side to the detour line 14 side by a switching signal 16a from the controller 9, and the extraction valve 17 is opened by a switching signal 17a from the controller 9. The auxiliary pump 18 is turned on again by the switching signal 18a from the controller 9, and the mixing switching valve 20 is opened by the switching signal 20a from the controller 9, so that the fuel from the next fuel tank 3 is supplied. The fuel extracted from the fuel tank 2 whose fuel level has decreased to a set value or less while the extraction to the extraction line 13 is started is in the on state. It is sucked up to the bypass line 14 side by the operation of the auxiliary pump 18, introduced into the upper part of the next fuel tank 3 through the opened mixing switching valve 20, and mixed with the fuel stored in the next fuel tank 2. The fuel in the fuel tank 3 in which hard particles of high concentration are not precipitated at the bottom is supplied into each cylinder 11 of the engine 10 through the fuel pump 12, the settling tank 21, the supply pump 22, and the fuel injection valve 23. Therefore, there is no concern that hard particles will enter the engine 10 in large quantities and seizure of the piston ring against the cylinder liner will occur.

尚、前記最後に燃料が抜き出される燃料タンク３の燃料レベルが設定値以下に減少する前に燃料は補充され、以下、前述と同様の作動が繰り返される形となる。   The fuel is replenished before the fuel level of the fuel tank 3 from which the fuel is finally extracted is reduced below the set value, and thereafter, the same operation as described above is repeated.

こうして、硬質粒子がエンジン１０に大量に入り込むことを回避し得、シリンダライナに対するピストンリングの焼付きを防止し得る。   Thus, a large amount of hard particles can be prevented from entering the engine 10, and seizure of the piston ring against the cylinder liner can be prevented.

図２は本発明を実施する形態の第二例であって、図中、図１と同一の符号を付した部分は同一物を表わしており、基本的な構成は図１に示すものと同様であるが、本図示例の特徴とするところは、図２に示す如く、前記燃料供給ライン５を、前記各燃料タンク１，２，３の底部と燃料ポンプ１２とをつなぐ抜出ライン１３から構成すると共に、前記流路切換手段４を、前記各燃料タンク１，２，３の底部に接続した抜出ライン１３途中に設けられた抜出弁１５´，１６´，１７から構成し、該抜出弁１５´，１６´，１７をレベル検出器６，７，８からの検出信号６ａ，７ａ，８ａに基づいて制御器９から出力される切換信号１５ａ´，１６ａ´，１７ａにより開閉制御し、前記燃料レベルが設定値以下に減少した燃料タンク１（又は２）と次の燃料タンク２（又は３）とから一定時間間隔で交互に燃料を抜き出し、該燃料を下流側に配置されるセットリングタンク２１で混ぜるようにした点にある。   FIG. 2 is a second example of an embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same components, and the basic configuration is the same as that shown in FIG. However, the feature of the illustrated example is that the fuel supply line 5 is connected to the bottom of each of the fuel tanks 1, 2, 3 and the fuel pump 12 as shown in FIG. The flow path switching means 4 is composed of extraction valves 15 ′, 16 ′, 17 provided in the middle of the extraction line 13 connected to the bottoms of the fuel tanks 1, 2, 3, Open / close control of the extraction valves 15 ', 16', 17 by switching signals 15a ', 16a', 17a output from the controller 9 based on the detection signals 6a, 7a, 8a from the level detectors 6, 7, 8 And the fuel tank 1 (or 2) in which the fuel level has decreased below the set value and Charge tank 2 (or 3) and the withdrawal of fuel alternately at predetermined time intervals from lies in that as mixing in settling tank 21 arranged the fuel to the downstream side.

図２に示す例の場合、燃料が満たされた複数の燃料タンク１，２，３のうち先ず、燃料タンク１から燃料供給ライン５の抜出ライン１３を経て燃料が抜き出され、燃料ポンプ１２によりセットリングタンク２１へ圧送され、該セットリングタンク２１内に一旦貯留された燃料が供給ポンプ２２により燃料噴射弁２３へ圧送され、該燃料噴射弁２３からエンジン１０の各気筒１１内に噴射される。   In the case of the example shown in FIG. 2, the fuel is first extracted from the fuel tank 1 through the extraction line 13 of the fuel supply line 5 among the fuel tanks 1, 2, 3 filled with fuel, and the fuel pump 12. The fuel once pumped to the set ring tank 21 and once stored in the set ring tank 21 is pumped to the fuel injection valve 23 by the supply pump 22 and injected from the fuel injection valve 23 into each cylinder 11 of the engine 10. The

このとき、抜出弁１５´は制御器９からの切換信号１５ａ´により開かれており、抜出弁１６´は制御器９からの切換信号１６ａ´により閉じられ、抜出弁１７は制御器９からの切換信号１７ａにより閉じられている。   At this time, the extraction valve 15 'is opened by a switching signal 15a' from the controller 9, the extraction valve 16 'is closed by a switching signal 16a' from the controller 9, and the extraction valve 17 is controlled by the controller. 9 is closed by a switching signal 17a from 9.

前記燃料タンク１の燃料レベルがレベル検出器６によって検出され、前記抜き出しが行われている燃料タンク１の燃料レベルがレベル検出器６からの検出信号６ａに基づいて図２の仮想線で示す如く設定値以下に減少した際には、前記抜出弁１５´，１６´は制御器９からの切換信号１５ａ´，１６ａ´により一定時間間隔で交互に開閉され、前記燃料レベルが設定値以下に減少した燃料タンク１と次の燃料タンク２とから一定時間間隔で交互に燃料が抜き出され、該燃料が下流側に配置されるセットリングタンク２１で混ぜられ、該セットリングタンク２１から硬質粒子濃度を低下させた燃料が供給ポンプ２２と燃料噴射弁２３とを経てエンジン１０の各気筒１１内に供給される。   The fuel level of the fuel tank 1 is detected by a level detector 6, and the fuel level of the fuel tank 1 that has been withdrawn is indicated by the phantom line in FIG. 2 based on the detection signal 6a from the level detector 6. When the pressure drops below the set value, the extraction valves 15 'and 16' are alternately opened and closed at regular time intervals by the switching signals 15a 'and 16a' from the controller 9, so that the fuel level falls below the set value. Fuel is withdrawn alternately from the reduced fuel tank 1 and the next fuel tank 2 at regular time intervals, and the fuel is mixed in the settling tank 21 arranged on the downstream side. The fuel whose concentration has been reduced is supplied into each cylinder 11 of the engine 10 through the supply pump 22 and the fuel injection valve 23.

この結果、硬質粒子がエンジン１０に大量に入り込むことがなくなり、シリンダライナに対するピストンリングの焼付きが生じなくなる。   As a result, hard particles do not enter the engine 10 in large quantities, and seizure of the piston ring against the cylinder liner does not occur.

尚、前記燃料タンク１が空になった場合には、前記抜出弁１５´は制御器９からの切換信号１５ａ´により閉じられると共に、前記抜出弁１６´は制御器９からの切換信号１６ａ´により開状態に保持され、前記燃料タンク２の底部から単独で燃料の抜き出しが継続して行われる。   When the fuel tank 1 is empty, the extraction valve 15 'is closed by a switching signal 15a' from the controller 9, and the extraction valve 16 'is switched from the controller 9. The fuel tank 2 is held in an open state by 16 a ′, and fuel is continuously extracted from the bottom of the fuel tank 2 alone.

この後、前記燃料タンク２の燃料レベルがレベル検出器７によって検出され、前記抜き出しが行われている燃料タンク２の燃料レベルが前記レベル検出器７からの検出信号７ａに基づいて設定値以下に減少した際には、前記抜出弁１６´，１７は制御器９からの切換信号１６ａ´，１７により一定時間間隔で交互に開閉され、前記燃料レベルが設定値以下に減少した燃料タンク２と次の燃料タンク３とから一定時間間隔で交互に燃料が抜き出され、該燃料が下流側に配置されるセットリングタンク２１で混ぜられ、該セットリングタンク２１から硬質粒子濃度を低下させた燃料が供給ポンプ２２と燃料噴射弁２３とを経てエンジン１０の各気筒１１内に供給されるため、硬質粒子がエンジン１０に大量に入り込んでシリンダライナに対するピストンリングの焼付きが生じる心配はない。   Thereafter, the fuel level of the fuel tank 2 is detected by the level detector 7, and the fuel level of the fuel tank 2 from which the fuel tank 2 has been withdrawn is set below the set value based on the detection signal 7a from the level detector 7. When it decreases, the extraction valves 16 'and 17 are alternately opened and closed at regular time intervals by the switching signals 16a' and 17 from the controller 9, and the fuel tank 2 having the fuel level reduced below the set value. Fuel withdrawn alternately from the next fuel tank 3 at regular time intervals, mixed with the settling tank 21 disposed downstream, and reduced in hard particle concentration from the settling tank 21 Is supplied to each cylinder 11 of the engine 10 through the supply pump 22 and the fuel injection valve 23, so that a large amount of hard particles enter the engine 10 and the piston for the cylinder liner is removed. There is no concern about the tonling seizure.

尚、前記最後に燃料が抜き出される燃料タンク３の燃料レベルが設定値以下に減少する前に燃料は補充され、以下、前述と同様の作動が繰り返される形となる。   The fuel is replenished before the fuel level of the fuel tank 3 from which the fuel is finally extracted is reduced below the set value, and thereafter, the same operation as described above is repeated.

こうして、図２に示す例の場合も、図１に示す例の場合と同様、硬質粒子がエンジン１０に大量に入り込むことを回避し得、シリンダライナに対するピストンリングの焼付きを防止し得る。   Thus, in the case of the example shown in FIG. 2, as in the case of the example shown in FIG. 1, it is possible to avoid a large amount of hard particles from entering the engine 10 and to prevent seizure of the piston ring against the cylinder liner.

一方、図２に示すものと同様の装置構成を用いて、前記抜出弁１５´，１６´，１７をレベル検出器６，７，８からの検出信号６ａ，７ａ，８ａに基づいて制御器９から出力される切換信号１５ａ´，１６ａ´，１７ａにより開閉制御し、前記燃料レベルが設定値以下に減少した燃料タンク１（又は２）と次の燃料タンク２（又は３）とから同時に燃料を抜き出すようにすることもできる。   On the other hand, using the same device configuration as that shown in FIG. 2, the extraction valves 15 ', 16', 17 are controlled based on the detection signals 6a, 7a, 8a from the level detectors 6, 7, 8. Open / close control is performed by switching signals 15a ′, 16a ′, and 17a output from 9, and fuel is simultaneously supplied from the fuel tank 1 (or 2) and the next fuel tank 2 (or 3) in which the fuel level has decreased below a set value. Can also be extracted.

この場合も、燃料が満たされた複数の燃料タンク１，２，３のうち先ず、燃料タンク１から燃料供給ライン５の抜出ライン１３を経て燃料が抜き出され、燃料ポンプ１２によりセットリングタンク２１へ圧送され、該セットリングタンク２１内に一旦貯留された燃料が供給ポンプ２２により燃料噴射弁２３へ圧送され、該燃料噴射弁２３からエンジン１０の各気筒１１内に噴射される。   Also in this case, the fuel is first extracted from the fuel tank 1 through the extraction line 13 of the fuel supply line 5 among the plurality of fuel tanks 1, 2, 3 filled with fuel, and the settling tank is then discharged by the fuel pump 12. The fuel that has been pumped to 21 and once stored in the settling tank 21 is pumped to the fuel injection valve 23 by the supply pump 22, and injected from the fuel injection valve 23 into each cylinder 11 of the engine 10.

このとき、抜出弁１５´は制御器９からの切換信号１５ａ´により開かれており、抜出弁１６´は制御器９からの切換信号１６ａ´により閉じられ、抜出弁１７は制御器９からの切換信号１７ａにより閉じられている。   At this time, the extraction valve 15 'is opened by a switching signal 15a' from the controller 9, the extraction valve 16 'is closed by a switching signal 16a' from the controller 9, and the extraction valve 17 is controlled by the controller. 9 is closed by a switching signal 17a from 9.

前記燃料タンク１の燃料レベルがレベル検出器６によって検出され、前記抜き出しが行われている燃料タンク１の燃料レベルがレベル検出器６からの検出信号６ａに基づいて図２の仮想線で示す如く設定値以下に減少した際には、前記開かれている抜出弁１５´に加え、抜出弁１６´が制御器９からの切換信号１６ａ´により同時に開かれ、前記燃料レベルが設定値以下に減少した燃料タンク１と次の燃料タンク２とから同時に燃料が抜き出され、硬質粒子濃度を低下させた燃料が燃料ポンプ１２とセットリングタンク２１と供給ポンプ２２と燃料噴射弁２３とを経てエンジン１０の各気筒１１内に供給される。   The fuel level of the fuel tank 1 is detected by a level detector 6, and the fuel level of the fuel tank 1 that has been withdrawn is indicated by the phantom line in FIG. 2 based on the detection signal 6a from the level detector 6. When the pressure drops below a set value, in addition to the open extraction valve 15 ', the extraction valve 16' is simultaneously opened by a switching signal 16a 'from the controller 9, and the fuel level is below the set value. Fuel is withdrawn simultaneously from the fuel tank 1 and the next fuel tank 2 that have been reduced to the same level, and the fuel whose hard particle concentration has been lowered passes through the fuel pump 12, the settling tank 21, the supply pump 22, and the fuel injection valve 23. It is supplied into each cylinder 11 of the engine 10.

この結果、硬質粒子がエンジン１０に大量に入り込むことがなくなり、シリンダライナに対するピストンリングの焼付きが生じなくなる。   As a result, hard particles do not enter the engine 10 in large quantities, and seizure of the piston ring against the cylinder liner does not occur.

尚、前記燃料タンク１が空になった場合には、前記抜出弁１５´は制御器９からの切換信号１５ａ´により閉じられると共に、前記抜出弁１６´は制御器９からの切換信号１６ａ´により開状態に保持され、前記燃料タンク２の底部から単独で燃料の抜き出しが継続して行われる。   When the fuel tank 1 is empty, the extraction valve 15 'is closed by a switching signal 15a' from the controller 9, and the extraction valve 16 'is switched from the controller 9. The fuel tank 2 is held in an open state by 16 a ′, and fuel is continuously extracted from the bottom of the fuel tank 2 alone.

この後、前記燃料タンク２の燃料レベルがレベル検出器７によって検出され、前記抜き出しが行われている燃料タンク２の燃料レベルが前記レベル検出器７からの検出信号７ａに基づいて設定値以下に減少した際には、前記開かれている抜出弁１６´に加え、抜出弁１７が制御器９からの切換信号１７ａにより同時に開かれ、前記燃料レベルが設定値以下に減少した燃料タンク２と次の燃料タンク３とから同時に燃料が抜き出され、硬質粒子濃度を低下させた燃料が燃料ポンプ１２とセットリングタンク２１と供給ポンプ２２と燃料噴射弁２３とを経てエンジン１０の各気筒１１内に供給されるため、硬質粒子がエンジン１０に大量に入り込んでシリンダライナに対するピストンリングの焼付きが生じる心配はない。   Thereafter, the fuel level of the fuel tank 2 is detected by the level detector 7, and the fuel level of the fuel tank 2 from which the fuel tank 2 has been withdrawn is set below the set value based on the detection signal 7a from the level detector 7. When the fuel tank 2 is decreased, the fuel valve 2 is opened simultaneously with the switching signal 17a from the controller 9 in addition to the opened extraction valve 16 ', and the fuel level is reduced below the set value. And the next fuel tank 3, fuel is extracted at the same time, and the fuel with reduced hard particle concentration passes through the fuel pump 12, the settling tank 21, the supply pump 22, and the fuel injection valve 23, and each cylinder 11 of the engine 10. Therefore, there is no fear that hard particles will enter the engine 10 and the piston ring will seize against the cylinder liner.

尚、前記最後に燃料が抜き出される燃料タンク３の燃料レベルが設定値以下に減少する前に燃料は補充され、以下、前述と同様の作動が繰り返される形となる。   The fuel is replenished before the fuel level of the fuel tank 3 from which the fuel is finally extracted is reduced below the set value, and thereafter, the same operation as described above is repeated.

こうして、図２に示すものと同様の装置構成を用いて制御のみを変えた例の場合も、図１に示す例の場合と同様、硬質粒子がエンジン１０に大量に入り込むことを回避し得、シリンダライナに対するピストンリングの焼付きを防止し得る。   Thus, even in the case of the example in which only the control is changed using the same apparatus configuration as shown in FIG. 2, it is possible to avoid a large amount of hard particles entering the engine 10 as in the case of the example shown in FIG. Seizure of the piston ring against the cylinder liner can be prevented.

図３は本発明を実施する形態の第三例であって、図中、図１及び図２と同一の符号を付した部分は同一物を表わしており、基本的な構成は図１に示すものと同様であるが、本図示例の特徴とするところは、図３に示す如く、前記燃料供給ライン５を、前記各燃料タンク１，２，３の底部と燃料ポンプ１２とをつなぐ抜出ライン１３と、該抜出ライン１３の燃料ポンプ１２より下流側から分岐して設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンク１（又は２）の燃料を次の燃料タンク２（又は３）の上部へ導入するための迂回ライン１４とから構成すると共に、前記流路切換手段４を、前記各燃料タンク１，２，３の底部に接続した抜出ライン１３途中に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンク１（又は２）から燃料を抜き出した後、次の燃料タンク２（又は３）の底部から燃料を抜き出すよう開閉制御される抜出弁１５´，１６´，１７と、前記抜出ライン１３と迂回ライン１４との分岐部に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンク１（又は２）の燃料を抜出ライン１３側から迂回ライン１４側へ導くよう切換可能な三方弁２４と、該三方弁２４より下流側における迂回ライン１４途中に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンク１（又は２）の燃料を次の燃料タンク２（又は３）の上部へ導入した後、次の燃料タンク２（又は３）の底部から抜き出される燃料を同じ燃料タンク２（又は３）の上部へ導入するよう切換可能な混合切換弁１９，２０とから構成し、前記抜出弁１５´，１６´，１７、三方弁２４及び混合切換弁１９，２０をレベル検出器６，７，８からの検出信号６ａ，７ａ，８ａに基づいて制御器９から出力される切換信号１５ａ´，１６ａ´，１７ａ，２４ａ，１９ａ，２０ａにより開閉制御し、前記燃料レベルが設定値以下に減少した燃料タンク１（又は２）から抜き出される燃料を次の燃料タンク２（又は３）の上部に導入した後、該次の燃料タンク２（又は３）の底部から燃料を抜き出すようにした点にある。   FIG. 3 is a third example of an embodiment of the present invention. In the figure, the same reference numerals as those in FIGS. 1 and 2 denote the same components, and the basic configuration is shown in FIG. As shown in FIG. 3, the fuel supply line 5 is connected to the bottom of each of the fuel tanks 1, 2, 3 and the fuel pump 12, as shown in FIG. The fuel in the fuel tank 1 (or 2), which is provided by branching from the downstream side of the line 13 and the fuel pump 12 of the extraction line 13 and whose fuel level is reduced below the set value, is transferred to the next fuel tank 2 (or 3) and a bypass line 14 for introduction into the upper part, and the flow path switching means 4 is provided in the middle of the extraction line 13 connected to the bottom of each of the fuel tanks 1, 2, 3 and Fuel tank 1 (or the fuel level has decreased below the set value (or ), And the extraction valves 15 ′, 16 ′, 17 which are controlled to be opened and closed so as to extract the fuel from the bottom of the next fuel tank 2 (or 3), the extraction line 13 and the bypass line 14, A three-way valve 24 that is switchable to guide the fuel in the fuel tank 1 (or 2) having a fuel level reduced to a set value or less from the extraction line 13 side to the detour line 14 side. After introducing the fuel of the fuel tank 1 (or 2), which is provided in the middle of the bypass line 14 on the downstream side of the valve 24 and whose fuel level is reduced below the set value, into the upper part of the next fuel tank 2 (or 3), It is composed of a mixing switching valve 19, 20 that can be switched to introduce the fuel extracted from the bottom of the next fuel tank 2 (or 3) into the upper part of the same fuel tank 2 (or 3). ', 16', 17, Switching signals 15a ', 16a', 17a, 24a, which are output from the controller 9 based on the detection signals 6a, 7a, 8a from the level detectors 6, 7, 8 for the three-way valve 24 and the mixing switching valves 19, 20 19a and 20a are used to control opening and closing, and after the fuel extracted from the fuel tank 1 (or 2) whose fuel level has decreased below the set value is introduced into the upper portion of the next fuel tank 2 (or 3), the next The fuel is extracted from the bottom of the fuel tank 2 (or 3).

図３に示す例の場合、燃料が満たされた複数の燃料タンク１，２，３のうち先ず、燃料タンク１から燃料供給ライン５の抜出ライン１３を経て燃料が抜き出され、燃料ポンプ１２によりセットリングタンク２１へ圧送され、該セットリングタンク２１内に一旦貯留された燃料が供給ポンプ２２により燃料噴射弁２３へ圧送され、該燃料噴射弁２３からエンジン１０の各気筒１１内に噴射される。   In the case of the example shown in FIG. 3, the fuel is first extracted from the fuel tank 1 through the extraction line 13 of the fuel supply line 5 out of the plurality of fuel tanks 1, 2, 3 filled with fuel. The fuel once pumped to the set ring tank 21 and once stored in the set ring tank 21 is pumped to the fuel injection valve 23 by the supply pump 22 and injected from the fuel injection valve 23 into each cylinder 11 of the engine 10. The

このとき、抜出弁１５´は制御器９からの切換信号１５ａ´により開かれており、抜出弁１６´は制御器９からの切換信号１６ａ´により閉じられ、抜出弁１７は制御器９からの切換信号１７ａにより閉じられ、三方弁２４は制御器９からの切換信号２４ａにより燃料を迂回ライン１４側ではなくセットリングタンク２１へ導く側に切り換えられており、混合切換弁１９は制御器９からの切換信号１９ａにより閉じられ、混合切換弁２０は制御器９からの切換信号２０ａにより閉じられている。   At this time, the extraction valve 15 'is opened by a switching signal 15a' from the controller 9, the extraction valve 16 'is closed by a switching signal 16a' from the controller 9, and the extraction valve 17 is controlled by the controller. 9 is closed by the switching signal 17a from the controller 9, and the three-way valve 24 is switched by the switching signal 24a from the controller 9 to the side for guiding the fuel to the settling tank 21 instead of the bypass line 14, and the mixing switching valve 19 is controlled. The mixing switching valve 20 is closed by a switching signal 20a from the controller 9, and the mixing switching valve 20 is closed by a switching signal 20a from the controller 9.

前記燃料タンク１の燃料レベルがレベル検出器６によって検出され、前記抜き出しが行われている燃料タンク１の燃料レベルがレベル検出器６からの検出信号６ａに基づいて図３の仮想線で示す如く設定値以下に減少した際には、前記三方弁２４が制御器９からの切換信号２４ａにより迂回ライン１４側に切り換えられると共に、前記混合切換弁１９が制御器９からの切換信号１９ａにより開かれ、これにより、前記燃料レベルが設定値以下に減少した燃料タンク１から抜き出される燃料は、前記燃料ポンプ１２の作動により前記三方弁２４を経て迂回ライン１４側へ迂回し、前記開かれた混合切換弁１９を介して次の燃料タンク２の上部へ導入され、該次の燃料タンク２内に貯留された燃料と混ぜられる。   The fuel level of the fuel tank 1 is detected by a level detector 6, and the fuel level of the fuel tank 1 that has been withdrawn is indicated by a virtual line in FIG. 3 based on a detection signal 6a from the level detector 6. When it decreases below the set value, the three-way valve 24 is switched to the bypass line 14 side by the switching signal 24a from the controller 9, and the mixing switching valve 19 is opened by the switching signal 19a from the controller 9. Thus, the fuel extracted from the fuel tank 1 whose fuel level has decreased below a set value is diverted to the detour line 14 side via the three-way valve 24 by the operation of the fuel pump 12, and the open mixing is performed. The fuel is introduced into the upper part of the next fuel tank 2 through the switching valve 19 and mixed with the fuel stored in the next fuel tank 2.

前記燃料タンク１が空になると、前記抜出弁１５´が制御器９からの切換信号１５ａ´により閉じられ、前記抜出弁１６´が制御器９からの切換信号１６ａ´により開かれ、底部に高濃度の硬質粒子が沈殿していない燃料タンク２内の燃料が一旦、前記燃料ポンプ１２の作動により前記三方弁２４を経て迂回ライン１４側へ迂回し、前記開かれた混合切換弁１９を介して燃料タンク２の上部へ導入され、これにより、前記燃料供給ライン５の抜出ライン１３に残存する硬質粒子濃度の高い燃料が硬質粒子濃度の低い燃料によって置換される形となる。   When the fuel tank 1 is emptied, the extraction valve 15 'is closed by a switching signal 15a' from the controller 9, and the extraction valve 16 'is opened by a switching signal 16a' from the controller 9. The fuel in the fuel tank 2 in which high-concentration hard particles are not precipitated is once detoured to the detour line 14 side through the three-way valve 24 by the operation of the fuel pump 12, and the opened mixing switching valve 19 is opened. Thus, the fuel with a high hard particle concentration remaining in the extraction line 13 of the fuel supply line 5 is replaced with the fuel with a low hard particle concentration.

前記燃料供給ライン５の抜出ライン１３に残存する硬質粒子濃度の高い燃料が硬質粒子濃度の低い燃料によって置換された後、前記三方弁２４が制御器９からの切換信号２４ａにより再度切り換えられると共に、前記混合切換弁１９が制御器９からの切換信号１９ａにより閉じられ、前記次の燃料タンク２からの燃料が燃料ポンプ１２と三方弁２４とセットリングタンク２１と供給ポンプ２２と燃料噴射弁２３とを経てエンジン１０の各気筒１１内に供給される。   After the high hard particle concentration fuel remaining in the extraction line 13 of the fuel supply line 5 is replaced by the low hard particle concentration fuel, the three-way valve 24 is switched again by a switching signal 24a from the controller 9. The mixing switching valve 19 is closed by a switching signal 19a from the controller 9, and the fuel from the next fuel tank 2 is supplied to the fuel pump 12, the three-way valve 24, the settling tank 21, the supply pump 22, and the fuel injection valve 23. And then supplied into each cylinder 11 of the engine 10.

この結果、硬質粒子がエンジン１０に大量に入り込むことがなくなり、シリンダライナに対するピストンリングの焼付きが生じなくなる。   As a result, hard particles do not enter the engine 10 in large quantities, and seizure of the piston ring against the cylinder liner does not occur.

この後、前記燃料タンク２の燃料レベルがレベル検出器７によって検出され、前記抜き出しが行われている燃料タンク２の燃料レベルが前記レベル検出器７からの検出信号７ａに基づいて設定値以下に減少した際には、前記三方弁２４が制御器９からの切換信号２４ａにより迂回ライン１４側に切り換えられると共に、前記混合切換弁２０が制御器９からの切換信号２０ａにより開かれ、これにより、前記燃料レベルが設定値以下に減少した燃料タンク２から抜き出される燃料は、前記燃料ポンプ１２の作動により前記三方弁２４を経て迂回ライン１４側へ迂回し、前記開かれた混合切換弁２０を介して次の燃料タンク３の上部へ導入され、該次の燃料タンク３内に貯留された燃料と混ぜられる。   Thereafter, the fuel level of the fuel tank 2 is detected by the level detector 7, and the fuel level of the fuel tank 2 from which the fuel tank 2 has been withdrawn is set below the set value based on the detection signal 7a from the level detector 7. When decreasing, the three-way valve 24 is switched to the bypass line 14 side by the switching signal 24a from the controller 9, and the mixing switching valve 20 is opened by the switching signal 20a from the controller 9, thereby The fuel withdrawn from the fuel tank 2 whose fuel level has decreased below a set value is diverted to the detour line 14 side via the three-way valve 24 by the operation of the fuel pump 12, and the opened mixed switching valve 20 Then, it is introduced into the upper part of the next fuel tank 3 and mixed with the fuel stored in the next fuel tank 3.

前記燃料タンク２が空になると、前記抜出弁１６´が制御器９からの切換信号１６ａ´により閉じられ、前記抜出弁１７が制御器９からの切換信号１７ａにより開かれ、底部に高濃度の硬質粒子が沈殿していない燃料タンク３内の燃料が一旦、前記燃料ポンプ１２の作動により前記三方弁２４を経て迂回ライン１４側へ迂回し、前記開かれた混合切換弁２０を介して燃料タンク３の上部へ導入され、これにより、前記燃料供給ライン５の抜出ライン１３に残存する硬質粒子濃度の高い燃料が硬質粒子濃度の低い燃料によって置換される形となる。   When the fuel tank 2 is emptied, the extraction valve 16 'is closed by a switching signal 16a' from the controller 9, and the extraction valve 17 is opened by a switching signal 17a from the controller 9. The fuel in the fuel tank 3 in which the hard particles of the concentration are not precipitated is once detoured to the detour line 14 side through the three-way valve 24 by the operation of the fuel pump 12, and via the opened mixing switching valve 20 The fuel is introduced into the upper part of the fuel tank 3, whereby the high hard particle concentration fuel remaining in the extraction line 13 of the fuel supply line 5 is replaced with the low hard particle concentration fuel.

前記燃料供給ライン５の抜出ライン１３に残存する硬質粒子濃度の高い燃料が硬質粒子濃度の低い燃料によって置換された後、前記三方弁２４が制御器９からの切換信号２４ａにより再度切り換えられると共に、前記混合切換弁２０が制御器９からの切換信号２０ａにより閉じられ、前記次の燃料タンク３からの燃料が燃料ポンプ１２と三方弁２４とセットリングタンク２１と供給ポンプ２２と燃料噴射弁２３とを経てエンジン１０の各気筒１１内に供給されるため、硬質粒子がエンジン１０に大量に入り込んでシリンダライナに対するピストンリングの焼付きが生じる心配はない。   After the high hard particle concentration fuel remaining in the extraction line 13 of the fuel supply line 5 is replaced by the low hard particle concentration fuel, the three-way valve 24 is switched again by a switching signal 24a from the controller 9. The mixing switching valve 20 is closed by a switching signal 20a from the controller 9, and the fuel from the next fuel tank 3 is supplied to the fuel pump 12, the three-way valve 24, the settling tank 21, the supply pump 22, and the fuel injection valve 23. Thus, there is no concern that hard particles will enter the engine 10 in large quantities and seize the piston ring against the cylinder liner.

尚、前記最後に燃料が抜き出される燃料タンク３の燃料レベルが設定値以下に減少する前に燃料は補充され、以下、前述と同様の作動が繰り返される形となる。   The fuel is replenished before the fuel level of the fuel tank 3 from which the fuel is finally extracted is reduced below the set value, and thereafter, the same operation as described above is repeated.

こうして、図３に示す例の場合も、図１及び図２に示す例の場合と同様、硬質粒子がエンジン１０に大量に入り込むことを回避し得、シリンダライナに対するピストンリングの焼付きを防止し得る。   Thus, in the case of the example shown in FIG. 3 as well, as in the case of the examples shown in FIGS. 1 and 2, it is possible to avoid a large amount of hard particles from entering the engine 10 and to prevent seizure of the piston ring against the cylinder liner. obtain.

更に、図３に示す例の場合、迂回ライン１４を燃料ポンプ１２の下流側から前記燃料タンク２，３へ延ばしているため、図１に示す例の場合に比べ、前記燃料タンク１，２から戻しの配管を出さなくて良くなる。   Further, in the case of the example shown in FIG. 3, the bypass line 14 extends from the downstream side of the fuel pump 12 to the fuel tanks 2 and 3. There is no need to put out return piping.

尚、本発明の舶用内燃機関の燃料供給方法及び装置は、上述の図示例にのみ限定されるものではなく、燃料タンクの個数は三個に限らず、複数であれば二個或いは四個以上とすることも可能であること等、その他、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。   The fuel supply method and apparatus for a marine internal combustion engine according to the present invention is not limited to the illustrated example described above, and the number of fuel tanks is not limited to three, and two or four or more as long as there are a plurality of fuel tanks. Of course, various modifications can be made without departing from the scope of the present invention.

本発明を実施する形態の第一例を示す全体概要構成図である。1 is an overall schematic configuration diagram showing a first example of an embodiment for carrying out the present invention. 本発明を実施する形態の第二例を示す全体概要構成図である。It is a whole schematic block diagram which shows the 2nd example of embodiment which implements this invention. 本発明を実施する形態の第三例を示す全体概要構成図である。It is a whole schematic block diagram which shows the 3rd example of embodiment which implements this invention.

符号の説明Explanation of symbols

１ 燃料タンク
２ 燃料タンク
３ 燃料タンク
４ 流路切換手段
４ａ 切換信号
５ 燃料供給ライン
６ レベル検出器
６ａ 検出信号
７ レベル検出器
７ａ 検出信号
９ 制御器
１０ エンジン
１１ 気筒
１２ 燃料ポンプ
１３ 抜出ライン
１４ 迂回ライン
１５ 三方弁
１５´ 抜出弁
１５ａ 切換信号
１６ 三方弁
１６´ 抜出弁
１６ａ 切換信号
１７ 抜出弁
１７ａ 切換信号
１８ 補助ポンプ
１８ａ 切換信号
１９ 混合切換弁
１９ａ 切換信号
２０ 混合切換弁
２０ａ 切換信号
２１ セットリングタンク
２２ 供給ポンプ
２３ 燃料噴射弁
２４ 三方弁 DESCRIPTION OF SYMBOLS 1 Fuel tank 2 Fuel tank 3 Fuel tank 4 Flow path switching means 4a Switching signal 5 Fuel supply line 6 Level detector 6a Detection signal 7 Level detector 7a Detection signal 9 Controller 10 Engine 11 Cylinder 12 Fuel pump 13 Extraction line 14 Detour line 15 Three-way valve 15 'Extraction valve 15a Switching signal 16 Three-way valve 16' Extraction valve 16a Switching signal 17 Extraction valve 17a Switching signal 18 Auxiliary pump 18a Switching signal 19 Mixing switching valve 19a Switching signal 20 Mixing switching valve 20a Switching Signal 21 Settling tank 22 Supply pump 23 Fuel injection valve 24 Three-way valve

Claims (10)

燃料タンク内に貯留された燃料を底部から抜き出して燃料ポンプにより圧送し、燃料噴射弁を介してエンジンの各気筒内に供給する舶用内燃機関の燃料供給方法において、
燃料が満たされた複数の燃料タンクを備え、各燃料タンクから順次燃料の抜き出しを行うようにし、抜き出しが行われている燃料タンクの燃料レベルが設定値以下に減少した際、前記燃料レベルが設定値以下に減少した燃料タンクから抜き出される燃料と前記次の燃料タンクから抜き出される燃料とを少なくとも混ぜ、燃料中に含まれる硬質粒子濃度を低下させた状態でエンジンの各気筒内に供給することを特徴とする舶用内燃機関の燃料供給方法。 In the fuel supply method for a marine internal combustion engine, the fuel stored in the fuel tank is extracted from the bottom, pumped by a fuel pump, and supplied to each cylinder of the engine via a fuel injection valve.
Provided with a plurality of fuel tanks filled with fuel, fuel is sequentially extracted from each fuel tank, and the fuel level is set when the fuel level of the fuel tank being extracted decreases below the set value. At least the fuel extracted from the fuel tank reduced to a value below the fuel extracted from the next fuel tank is mixed and supplied to each cylinder of the engine in a state where the concentration of hard particles contained in the fuel is reduced. A fuel supply method for a marine internal combustion engine. 前記燃料レベルが設定値以下に減少した燃料タンクから抜き出される燃料を次の燃料タンクの上部に導入しつつ、該次の燃料タンクの底部から燃料を抜き出すようにした請求項１記載の舶用内燃機関の燃料供給方法。   2. A marine internal combustion engine as set forth in claim 1, wherein the fuel extracted from the fuel tank whose fuel level has decreased below a set value is introduced into the upper portion of the next fuel tank, and the fuel is extracted from the bottom of the next fuel tank. Engine fuel supply method. 前記燃料レベルが設定値以下に減少した燃料タンクと、次の燃料タンクとから一定時間間隔で交互に燃料を抜き出し、該燃料を下流側に配置されるセットリングタンクで混ぜるようにした請求項１記載の舶用内燃機関の燃料供給方法。   2. A fuel tank having the fuel level reduced below a set value and a next fuel tank are alternately withdrawn at regular time intervals, and the fuel is mixed in a settling tank disposed downstream. A fuel supply method for a marine internal combustion engine. 前記燃料レベルが設定値以下に減少した燃料タンクと、次の燃料タンクとから同時に燃料を抜き出すようにした請求項１記載の舶用内燃機関の燃料供給方法。   2. A fuel supply method for a marine internal combustion engine according to claim 1, wherein fuel is withdrawn simultaneously from a fuel tank whose fuel level has decreased to a set value or less and a next fuel tank. 前記燃料レベルが設定値以下に減少した燃料タンクから抜き出される燃料を次の燃料タンクの上部に導入した後、該次の燃料タンクの底部から燃料を抜き出すようにした請求項１記載の舶用内燃機関の燃料供給方法。   2. A marine internal combustion engine as set forth in claim 1, wherein the fuel extracted from the fuel tank whose fuel level has decreased below a set value is introduced into the upper part of the next fuel tank, and then the fuel is extracted from the bottom of the next fuel tank. Engine fuel supply method. 燃料タンク内に貯留された燃料を底部から抜き出して燃料ポンプにより圧送し、燃料噴射弁を介してエンジンの各気筒内に供給する舶用内燃機関の燃料供給装置において、
燃料が満たされた複数の燃料タンクと、
該各燃料タンクから順次燃料を抜き出し可能となるよう流路切換手段が配設された燃料供給ラインと、
前記各燃料タンクの燃料レベルを検出するレベル検出器と、
前記各燃料タンクから順次燃料の抜き出しを行い、抜き出しが行われている燃料タンクの燃料レベルが前記レベル検出器からの検出信号に基づいて設定値以下に減少した際、前記燃料レベルが設定値以下に減少した燃料タンクから抜き出される燃料と前記次の燃料タンクから抜き出される燃料とを少なくとも混ぜ、燃料中に含まれる硬質粒子濃度を低下させた状態でエンジンの各気筒内に供給可能となるよう前記燃料供給ラインの流路切換手段に切換信号を出力する制御器と
を備えたことを特徴とする舶用内燃機関の燃料供給装置。 In the fuel supply device for a marine internal combustion engine, the fuel stored in the fuel tank is extracted from the bottom, pumped by a fuel pump, and supplied to each cylinder of the engine via a fuel injection valve.
A plurality of fuel tanks filled with fuel;
A fuel supply line provided with flow path switching means so that fuel can be sequentially extracted from each fuel tank;
A level detector for detecting the fuel level of each fuel tank;
The fuel is sequentially extracted from each fuel tank, and when the fuel level of the fuel tank from which the fuel is being extracted decreases below the set value based on the detection signal from the level detector, the fuel level is below the set value. The fuel extracted from the reduced fuel tank and the fuel extracted from the next fuel tank are mixed at least, and can be supplied into each cylinder of the engine in a state where the concentration of hard particles contained in the fuel is reduced. And a controller for outputting a switching signal to the flow path switching means of the fuel supply line. 前記燃料供給ラインを、
前記各燃料タンクの底部と燃料ポンプとをつなぐ抜出ラインと、
該抜出ラインから分岐して設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクの燃料を次の燃料タンクの上部へ導入するための迂回ラインと
から構成すると共に、
前記流路切換手段を、
前記抜出ラインと迂回ラインとの分岐部に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクの燃料を抜出ライン側から迂回ライン側へ導くよう切換可能な三方弁と、
前記迂回ライン途中に設けられ且つ前記三方弁の切換により抜出ライン側から迂回ライン側へ導かれる燃料を次の燃料タンクの上部へ圧送するための補助ポンプと、
該補助ポンプより下流側における迂回ライン途中に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクの燃料を次の燃料タンクへ導入するよう切換可能な混合切換弁と、
前記燃料タンクのうち最後に燃料が抜き出される燃料タンクの底部に接続した抜出ライン途中に設けられ且つ該燃料タンクから最後に燃料が抜き出される際に開かれる抜出弁と
から構成した請求項６記載の舶用内燃機関の燃料供給装置。 The fuel supply line;
An extraction line connecting the bottom of each fuel tank and the fuel pump;
A detour line for branching from the extraction line and for introducing the fuel in the fuel tank whose fuel level is reduced below a set value to the upper part of the next fuel tank,
The flow path switching means,
A three-way valve provided at a branch portion between the extraction line and the bypass line and switchable to guide the fuel in the fuel tank whose fuel level is reduced below a set value from the extraction line side to the bypass line side;
An auxiliary pump that is provided in the middle of the bypass line and that pumps fuel guided from the extraction line side to the bypass line side by switching the three-way valve to the upper part of the next fuel tank;
A mixing switching valve which is provided in the middle of a bypass line downstream of the auxiliary pump and which can be switched so as to introduce the fuel of the fuel tank whose fuel level is reduced below a set value into the next fuel tank;
An extraction valve provided in the middle of an extraction line connected to the bottom of the fuel tank from which fuel is finally extracted from the fuel tank and opened when fuel is finally extracted from the fuel tank. Item 7. A fuel supply device for a marine internal combustion engine according to Item 6. 前記燃料供給ラインを、
前記各燃料タンクの底部と燃料ポンプとをつなぐ抜出ラインから構成すると共に、
前記流路切換手段を、
前記各燃料タンクの底部に接続した抜出ライン途中に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクと次の燃料タンクとから一定時間間隔で交互に燃料を抜き出し、該燃料を下流側に配置されるセットリングタンクで混ぜるよう開閉制御される抜出弁から構成した請求項６記載の舶用内燃機関の燃料供給装置。 The fuel supply line;
Comprising a withdrawal line connecting the bottom of each fuel tank and the fuel pump;
The flow path switching means,
The fuel is alternately extracted at regular time intervals from the fuel tank and the next fuel tank which are provided in the middle of the extraction line connected to the bottom of each fuel tank and whose fuel level has decreased below a set value. The fuel supply device for a marine internal combustion engine according to claim 6, wherein the fuel supply device is constituted by an extraction valve that is controlled to be opened and closed so as to be mixed in a settling tank disposed on the side. 前記燃料供給ラインを、
前記各燃料タンクの底部と燃料ポンプとをつなぐ抜出ラインから構成すると共に、
前記流路切換手段を、
前記各燃料タンクの底部に接続した抜出ライン途中に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクと次の燃料タンクとから同時に燃料を抜き出すよう開閉制御される抜出弁から構成した請求項６記載の舶用内燃機関の燃料供給装置。 The fuel supply line;
Comprising a withdrawal line connecting the bottom of each fuel tank and the fuel pump;
The flow path switching means,
It comprises a withdrawal valve provided in the middle of the withdrawal line connected to the bottom of each fuel tank and controlled to be opened and closed so that fuel is withdrawn from the next fuel tank at the same time as the fuel level is reduced below a set value. The fuel supply device for a marine internal combustion engine according to claim 6. 前記燃料供給ラインを、
前記各燃料タンクの底部と燃料ポンプとをつなぐ抜出ラインと、
該抜出ラインの燃料ポンプより下流側から分岐して設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクの燃料を次の燃料タンクの上部へ導入するための迂回ラインと
から構成すると共に、
前記流路切換手段を、
前記各燃料タンクの底部に接続した抜出ライン途中に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクから燃料を抜き出した後、次の燃料タンクの底部から燃料を抜き出すよう開閉制御される抜出弁と、
前記抜出ラインと迂回ラインとの分岐部に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクの燃料を抜出ライン側から迂回ライン側へ導くよう切換可能な三方弁と、
該三方弁より下流側における迂回ライン途中に設けられ且つ前記燃料レベルが設定値以下に減少した燃料タンクの燃料を次の燃料タンクの上部へ導入した後、次の燃料タンクの底部から抜き出される燃料を同じ燃料タンクの上部へ導入するよう切換可能な混合切換弁と
から構成した請求項６記載の舶用内燃機関の燃料供給装置。 The fuel supply line;
An extraction line connecting the bottom of each fuel tank and the fuel pump;
And a detour line for branching from the downstream side of the fuel pump of the extraction line and for introducing the fuel in the fuel tank whose fuel level is reduced below a set value to the upper part of the next fuel tank. ,
The flow path switching means,
Opening / closing control is performed so that fuel is extracted from the fuel tank provided in the extraction line connected to the bottom of each fuel tank and whose fuel level has decreased below a set value, and then extracted from the bottom of the next fuel tank. An extraction valve,
A three-way valve provided at a branch portion between the extraction line and the bypass line and switchable to guide the fuel in the fuel tank whose fuel level is reduced below a set value from the extraction line side to the bypass line side;
The fuel in the fuel tank provided in the detour line on the downstream side of the three-way valve and having the fuel level decreased below the set value is introduced into the upper part of the next fuel tank, and then extracted from the bottom of the next fuel tank. The fuel supply device for a marine internal combustion engine according to claim 6, further comprising a mixing switching valve that can be switched so as to introduce fuel into an upper portion of the same fuel tank.
JP2007133094A 2007-05-18 2007-05-18 Fuel supply method and apparatus for marine internal combustion engine Expired - Fee Related JP4893466B2 (en)

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JP2007133094A JP4893466B2 (en) 2007-05-18 2007-05-18 Fuel supply method and apparatus for marine internal combustion engine
KR1020097023508A KR101067267B1 (en) 2007-05-18 2008-04-15 Method and apparatus for supplying fuel to marine internal combustion engine
CN2008800164466A CN101678887B (en) 2007-05-18 2008-04-15 Fuel supply method and device for internal combustion marine engine
EP08738590.2A EP2157014A4 (en) 2007-05-18 2008-04-15 Fuel supply method and device for internal combustion marine engine
MYPI20094845 MY151142A (en) 2007-05-18 2008-04-15 Method and apparatus for supplying fuel to marine internal combustion engine
PCT/JP2008/000984 WO2008142826A1 (en) 2007-05-18 2008-04-15 Fuel supply method and device for internal combustion marine engine

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