JP2018091255A - 密閉タンクシステム - Google Patents
密閉タンクシステム Download PDFInfo
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- JP2018091255A JP2018091255A JP2016236267A JP2016236267A JP2018091255A JP 2018091255 A JP2018091255 A JP 2018091255A JP 2016236267 A JP2016236267 A JP 2016236267A JP 2016236267 A JP2016236267 A JP 2016236267A JP 2018091255 A JP2018091255 A JP 2018091255A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
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- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/04—Tank inlets
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
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- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
- B60K15/03504—Fuel tanks characterised by venting means adapted to avoid loss of fuel or fuel vapour, e.g. with vapour recovery systems
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- B60—VEHICLES IN GENERAL
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- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
- B60K15/03519—Valve arrangements in the vent line
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/04—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring fuels, lubricants or mixed fuels and lubricants
- B67D7/0476—Vapour recovery systems
- B67D7/0478—Vapour recovery systems constructional features or components
- B67D7/048—Vapour flow control means, e.g. valves, pumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/04—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring fuels, lubricants or mixed fuels and lubricants
- B67D7/0476—Vapour recovery systems
- B67D7/0478—Vapour recovery systems constructional features or components
- B67D7/0492—Vapour storing means, e.g. dedicated ullage spaces, separate tanks
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- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/0809—Judging failure of purge control system
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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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/0836—Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold
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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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/089—Layout of the fuel vapour installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
- F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/0319—Fuel tanks with electronic systems, e.g. for controlling fuelling or venting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/0321—Fuel tanks characterised by special sensors, the mounting thereof
- B60K2015/03217—Fuel level sensors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03256—Fuel tanks characterised by special valves, the mounting thereof
- B60K2015/03289—Float valves; Floats therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
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- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03256—Fuel tanks characterised by special valves, the mounting thereof
- B60K2015/03302—Electromagnetic valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
- B60K15/03504—Fuel tanks characterised by venting means adapted to avoid loss of fuel or fuel vapour, e.g. with vapour recovery systems
- B60K2015/03514—Fuel tanks characterised by venting means adapted to avoid loss of fuel or fuel vapour, e.g. with vapour recovery systems with vapor recovery means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
- B60K2015/03542—Mounting of the venting means
- B60K2015/03552—Mounting of the venting means the venting means are integrated into the fuel filler pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
- B60K2015/03561—Venting means working at specific times
- B60K2015/03571—Venting during driving
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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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M2025/0845—Electromagnetic valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M2025/0863—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir with means dealing with condensed fuel or water, e.g. having a liquid trap
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7287—Liquid level responsive or maintaining systems
- Y10T137/7297—With second diverse control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
Description
これについて説明する。継ぎ足し給油が行われると、燃料液面は満タン液位を超える満タン超液位に達する。すると、満タン規制弁は、燃料に接液した状態になる。このとき、密閉弁の開放制御が行われると、満タン規制弁の弁部を境とする上流側(燃料タンク内の高圧側)及び下流側(連通路の低圧側)の間で差圧が生じる。すると、この差圧により満タン規制弁内の燃料液面が上昇する。このとき、フロートの動きによって満タン規制弁の弁部は閉じようとする。ところが、フロートの動きに先行して、前記差圧により燃料が下流側(連通路の低圧側)に吸い出されてしまう。
その結果、継ぎ足し給油により燃料液面が満タン超液位に達している状態で、密閉弁の開放制御が行われた際に、液状の燃料が密閉弁を通してキャニスタにまで到達してしまうおそれがあったのである。
はじめに、本発明の実施形態に係る密閉タンクシステム11の概要について、駆動源としてエンジン(内燃機関:不図示)及び電動機(不図示)を備える不図示のハイブリッド車両(以下、「車両」と省略する。)に適用した例をあげて、図面を参照して説明する。
なお、以下に示す図面において、同一の部材または相当する部材間には同一の参照符号を付するものとする。また、部材のサイズ及び形状は、説明の便宜のため、変形または誇張して模式的に表す場合がある。
本発明の実施形態に係る密閉タンクシステム11は、図1に示すように、燃料タンク13と、キャニスタ15と、密閉タンクシステム11の統括制御を行うECU(Electronic Control Unit)17と、を備える。
また、燃料タンク13には、燃料タンク13とキャニスタ15との間を連通接続する蒸発燃料排出通路(本発明の「連通路」に相当する。)37が設けられている。
次に、ECU17周辺のブロック構成について、図2を参照して説明する。図2は、ECU17周辺のブロック構成図である。
本発明の制御部として機能するECU17は、車両後部の荷室に設けられている。ECU17には、図1及び図2に示すように、入力系として、前記の燃料残量センサ36及びタンク内圧センサ43、タコメータ51、並びに、傾斜角センサ53がそれぞれ接続されている。タコメータ51は、エンジン回転速度を検出する機能を有する。傾斜角センサ53は、水平面に対する自車両の傾斜角を検出する機能を有する。タコメータ51により検出されたエンジン回転速度、傾斜角センサ53により検出された自車両の傾斜角Atankの情報は、ECU17へと送られる。
なお、自車両の傾斜角Atankがゼロ(水平)の際に燃料に接液していた満タン規制弁39が、燃料に接液しなくなる事象が起こるのは、自車両(燃料タンク13)の傾斜方向が、その傾斜時に燃料液面に対して満タン規制弁39が離れる方向(図4、図5の例では、燃料タンク13の傾斜方向は反時計回り方向)である。そのため、傾斜角閾値Atank_thを設定するに際しては、燃料タンク13の天板13aのうち中央部Ctrに対する満タン規制弁39の取付位置に係るオフセットの向きを考慮する。
また、傾斜角閾値Atank_thは、燃料タンク13の天板13aのうち中央部Ctrに対する満タン規制弁39の取付位置に係るオフセット長L(図4参照)が長くなるほど小さくなる。つまり、傾斜角閾値Atank_thは、オフセット長Lに対して逆相関の関係にある。
次に、本発明の実施形態に係る密閉タンクシステム11の動作について、図3〜図5を参照して説明する。
図3は、本発明の実施形態に係る密閉タンクシステム11が実行する密閉弁開閉制御の処理の流れを表すフローチャート図である。図4、図5は、密閉タンクシステム11の動作説明に供する図である。
要するに、制御部65は、エンジンの作動中であってタンク内圧Ptankがタンク内圧閾値Ptank_thを超えている場合であっても、満タン規制弁39が燃料に接液している場合には、密閉弁45を開放すると満タン規制弁39を通して液状の燃料が蒸発燃料排出通路37の方に吸い出されて密閉弁45を通してキャニスタ15に到達するおそれがあるとみなして、密閉弁45の開放を禁止する制御を行う。
次に、本発明の実施形態に係る密閉タンクシステム11の作用効果について説明する。
本発明の実施形態に係る第1の観点(請求項1に対応)に基づく密閉タンクシステム11は、車両に搭載されたエンジン(内燃機関)に供給する燃料を貯留する燃料タンク13と、燃料タンク13に蒸発燃料排出通路(連通路)37を介して接続され、燃料タンク13で生じた蒸発燃料を吸着するキャニスタ15と、燃料タンク13の室内であって蒸発燃料排出通路37に介在するように設けられ、燃料液面が所定の満タン液位RA_fullに達するとフロート41が燃料に浮くことで蒸発燃料排出通路37を閉止する動作を行う満タン規制弁39と、蒸発燃料排出通路37のうち燃料タンク13からみて満タン規制弁39の下流側に設けられ、蒸発燃料排出通路37を開放又は閉止する動作を行う密閉弁45と、燃料タンク13に貯留された燃料残量RAを検出する燃料残量センサ(燃料残量検出部)36と、密閉弁45を開放又は閉止させる制御を行う制御部65と、を備える。
第1の観点に基づく密閉タンクシステム11では、制御部65は、エンジンの作動中に燃料残量センサ36により検出された燃料残量RAが所定の燃料残量閾値RA_thを超える場合に、密閉弁45を開放させる制御を禁止する。
以上説明した複数の実施形態は、本発明の具現化の例を示したものである。したがって、これらによって本発明の技術的範囲が限定的に解釈されることがあってはならない。本発明はその要旨またはその主要な特徴から逸脱することなく、様々な形態で実施することができるからである。
13 燃料タンク
15 キャニスタ
36 燃料残量センサ(燃料残量検出部)
37 蒸発燃料排出通路(連通路)
39 満タン規制弁
41 満タン規制弁のフロート
45 密閉弁
53 傾斜角センサ(傾斜角検出部)
63 判定部
65 制御部
Claims (3)
- 車両に搭載された内燃機関に供給する燃料を貯留する燃料タンクと、
前記燃料タンクに連通路を介して接続され、該燃料タンクで生じた蒸発燃料を吸着するキャニスタと、
前記燃料タンクの室内であって前記連通路に介在するように設けられ、燃料液面が所定の満タン液位に達するとフロートが燃料に浮くことで該連通路を閉止する動作を行う満タン規制弁と、
前記連通路のうち前記燃料タンクからみて前記満タン規制弁の下流側に設けられ、該連通路を開放又は閉止する動作を行う密閉弁と、
前記燃料タンクに貯留された燃料残量を検出する燃料残量検出部と、
前記密閉弁を開放又は閉止させる制御を行う制御部と、を備え、
前記制御部は、前記内燃機関の作動中に前記燃料残量検出部により検出された燃料残量が所定の閾値を超える場合に、前記密閉弁を開放させる制御を禁止する
ことを特徴とする密閉タンクシステム。 - 請求項1に記載の密閉タンクシステムであって、
前記満タン規制弁は、前記燃料タンクを平面から視た中央部に対してオフセットして配設されており、
前記満タン規制弁が燃料に接液しているか否かを判定する判定部をさらに備え、
前記制御部は、前記内燃機関の作動中に前記燃料残量検出部により検出された燃料残量が所定の閾値を超える場合であっても、前記判定部により前記満タン規制弁が燃料に接液していない旨の判定が下された場合、前記密閉弁を開放させる制御を行う
ことを特徴とする密閉タンクシステム。 - 請求項2に記載の密閉タンクシステムであって、
前記車両の傾斜角を検出する傾斜角検出部をさらに備え、
前記判定部は、前記傾斜角検出部により検出された前記車両の傾斜角が所定の閾値以下の場合に、前記満タン規制弁が燃料に接液していない旨の判定を下す
ことを特徴とする密閉タンクシステム。
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