JP7268626B2 - ハイブリッド車両の駆動システム - Google Patents
ハイブリッド車両の駆動システム Download PDFInfo
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- JP7268626B2 JP7268626B2 JP2020042891A JP2020042891A JP7268626B2 JP 7268626 B2 JP7268626 B2 JP 7268626B2 JP 2020042891 A JP2020042891 A JP 2020042891A JP 2020042891 A JP2020042891 A JP 2020042891A JP 7268626 B2 JP7268626 B2 JP 7268626B2
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- voltage
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- determination
- engine
- switch
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0061—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electrical machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/48—Parallel type
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- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/50—Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
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- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
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- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
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- H—ELECTRICITY
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- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering using capacitors as storage or buffering devices
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- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
-
- 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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
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Description
図1には、本実施形態の駆動システム50を搭載するハイブリッド車両10が図示されている。ハイブリッド車両10のハイブリッドシステムは、車両の動力源としてエンジン11及びモータジェネレータ20を備えている。エンジン11は、補機としてスタータモータ12を有している。スタータモータ12は、車載の低圧バッテリ54からの給電によって駆動する。エンジン11の出力軸13が、クラッチ15を介してモータジェネレータ20と連結されるようになっている。エンジン11やモータジェネレータ20の出力トルクは、自動変速機25及びディファレンシャル30を介して複数の駆動輪35に伝達される。自動変速機25は、モータジェネレータ20に連結されているトルクコンバータ26と、トルクコンバータ26とディファレンシャル30との間に配置されている変速装置27とを備えている。変速装置27は、有段式の変速装置であってもよいし、無段式の変速装置であってもよい。
駆動システム50は、駆動回路60と制御装置80とを備えている。駆動回路60は、車載の高圧バッテリ52の直流電圧である高圧直流電圧VBを交流電圧に変換してモータジェネレータ20に出力することによってモータジェネレータ20を駆動させるインバータ70を備えている。高圧バッテリ52の正極とインバータ70とは正側電力ライン61によって接続されているとともに、高圧バッテリ52の負極とインバータ70とは負側電力ライン62によって接続されている。負側電力ライン62は、メイン負側電力ライン63と、サブ負側電力ライン64とを含んでいる。メイン負側電力ライン63の第1端は高圧バッテリ52に接続されているとともに、メイン負側電力ライン63の第2端はインバータ70に接続されている。サブ負側電力ライン64の第1端はメイン負側電力ライン63に接続されている。また、メイン負側電力ライン63のうち、サブ負側電力ライン64の第1端との接続部分とインバータとの間の部分に、サブ負側電力ライン64の第2端が接続されている。そして、サブ負側電力ライン64には、抵抗64aが設けられている。
本処理ルーチンにおいて、ステップS31では、ソーク時間TMskが判定時間TMskTh以上であるか否かの判定が行われる。ソーク時間TMskとは、前回に運転スイッチ41がオフにされた際に実行された電圧低下処理の終了時点からの経過時間である。前回に運転スイッチ41がオフにされた際に実行された電圧低下処理は、第1電圧低下処理であってもよいし、第2電圧低下処理であってもよい。
本実施形態では、ソーク時間TMskが判定時間TMskTh以上であること、及び、上記電圧減少量が判定減少量ΔVHThよりも大きいことの少なくとも一方が成立しているときには、前回の電圧低下処理の終了時点よりもコンデンサ電圧VHが低下しているとの判定がなされる。一方、ソーク時間TMskが判定時間TMskTh以上であること、及び、上記電圧減少量が判定減少量ΔVHThよりも大きいことの何れもが成立していないときには、前回の電圧低下処理の終了時点よりもコンデンサ電圧VHが低下しているとの判定がなされない。よって、本実施形態では、ステップS31,S32が、運転スイッチ41がオフからオンにされた場合、前回の電圧低下処理の終了時点よりもコンデンサ電圧VHが減少しているか否かを判定する「電圧減少判定処理」に該当する。また、ステップS31,S32で構成される電圧減少判定処理が、運転スイッチ41がオフからオンにされた場合、駆動回路60をチェックする「始動時チェック処理」の一例である。
モータジェネレータ20に異常が発生していると診断されている状況下で運転者による操作によって運転スイッチ41がオフにされた場合、第1電圧低下処理が実行される(S22~S24)。第1電圧低下処理では、DCDCコンバータ72の駆動によってコンデンサ67が放電される。コンデンサ電圧VHが第1終了判定電圧VHTh1以下になると、第1電圧低下処理が終了される(S24:YES)。その結果、ハイブリッドシステムの駆動が停止される。
(条件1)電圧減少判定処理によって前回の電圧低下処理の終了時点よりもコンデンサ電圧VHが減少しているとの判定がなされたこと。
(条件2)リレー異常判定処理によってコンデンサ電圧VHが上昇するとの判定がなされなかったこと。
(条件3)プリチャージ処理の実行時間TMbが判定実行時間TMbThを経過するまでの間に、プリチャージ処理の実行に起因するコンデンサ電圧VHの上昇量が判定上昇量ΔVHTh3以上であること、及び、高圧直流電圧VBとコンデンサ電圧VHとの差が判定差ΔVB以下になることの何れもが成立したこと。
・プリチャージ処理の実行に起因するコンデンサ電圧VHの上昇量が判定上昇量ΔVHTh3以上であること、及び、高圧直流電圧VBとコンデンサ電圧VHとの差が判定差ΔVB以下になることのうちの少なくとも一方が成立した場合には、システムメインリレー65が正常であると判断し、プリチャージ処理を終了させてエンジン11の運転を許可してもよい。
(a)制御装置80は、コンピュータプログラムに従って各種処理を実行する一つ以上のプロセッサを備えている。プロセッサは、CPU並びに、RAM及びROMなどのメモリを含んでいる。メモリは、処理をCPUに実行させるように構成されたプログラムコード又は指令を格納している。メモリ、すなわちコンピュータ可読媒体は、汎用又は専用のコンピュータでアクセスできるあらゆる利用可能な媒体を含んでいる。
(b)制御装置80は、各種処理を実行する一つ以上の専用のハードウェア回路を備えている。専用のハードウェア回路としては、例えば、特定用途向け集積回路、すなわちASIC又はFPGAを挙げることができる。ASICとは「Application Specific Integrated Circuit」の略記であり、FPGAとは「Field Programmable Gate Array」の略記である。
(c)制御装置80は、各種処理の一部をコンピュータプログラムに従って実行するプロセッサと、各種処理のうち残りの処理を実行する専用のハードウェア回路とを備えている。
11…エンジン
12…スタータモータ
13…出力軸
15…クラッチ
20…モータジェネレータ
41…運転スイッチ
50…駆動システム
52…高圧バッテリ
54…低圧バッテリ
60…駆動回路
61…正側電力ライン
62…負側電力ライン
65…システムメインリレー
65B,65G,65P…スイッチ
67…コンデンサ
68…放電抵抗
70…インバータ
72…DCDCコンバータ
80…制御装置
101…電圧センサ
Claims (6)
- 車両の動力源としてエンジン及びモータを備えるハイブリッド車両に適用され、
高圧バッテリに接続されている駆動回路と、前記エンジン及び前記モータを制御する制御装置と、を備え、
前記駆動回路は、
前記高圧バッテリの直流電圧を交流電圧に変換して前記モータに出力することによって当該モータを駆動させるインバータと、
前記高圧バッテリの正極と前記インバータとを接続する電力ラインである正側電力ラインと、
前記高圧バッテリの負極と前記インバータとを接続する電力ラインである負側電力ラインと、
前記正側電力ラインに配置されている第1スイッチ、及び、前記負側電力ラインに配置されている第2スイッチを有するシステムメインリレーと、
前記高圧バッテリから前記インバータへの電力供給経路における前記システムメインリレーと当該インバータとの間に配置されており、前記正側電力ラインに第1端が接続されているとともに前記負側電力ラインに第2端が接続されているコンデンサと、
前記コンデンサに対して並列に配置されている放電抵抗と、
前記コンデンサの電圧をコンデンサ電圧として検出する電圧センサと、
前記正側電力ラインにおける前記第1スイッチと前記インバータとの間の部分、及び、前記負側電力ラインにおける前記第2スイッチと前記インバータとの間の部分の双方に接続されている電動装置と、を備え、
前記制御装置は、
前記モータに異常が発生しているか否かを診断するモータ異常診断処理と、
前記モータ異常診断処理によって前記モータに異常が発生していると診断されている状況下で前記ハイブリッド車両の運転スイッチがオンからオフにされたときに、前記コンデンサ電圧が規定電圧以下になるまで前記電動装置を駆動させる電圧低下処理と、
前記運転スイッチがオフからオンにされた場合、前記駆動回路をチェックする始動時チェック処理と、
前記エンジンを始動させるエンジン始動処理と、を実行するようになっており、
前記始動時チェック処理は、前回の前記電圧低下処理の終了時点よりも前記コンデンサ電圧が減少しているか否かを判定する電圧減少判定処理を含み、
前記制御装置は、前記電圧減少判定処理によって前回の前記電圧低下処理の終了時点よりも前記コンデンサ電圧が減少しているとの判定がなされたことを条件に、前記エンジン始動処理を実行する
ハイブリッド車両の駆動システム。 - 前記制御装置は、前記電圧減少判定処理において、前回の前記電圧低下処理の終了時点からの経過時間が判定時間以上であるときに、前回の前記電圧低下処理の終了時点よりも前記コンデンサ電圧が減少しているとの判定をなす
請求項1に記載のハイブリッド車両の駆動システム。 - 前記制御装置は、前記電圧減少判定処理において、前回の前記電圧低下処理の終了時点からの前記コンデンサ電圧の減少量である電圧減少量が判定減少量以上であるときに、前回の前記電圧低下処理の終了時点よりも前記コンデンサ電圧が減少しているとの判定をなす
請求項2に記載のハイブリッド車両の駆動システム。 - 前記制御装置は、前記第1スイッチ及び前記第2スイッチの双方をオン状態にすることによって前記コンデンサ電圧を上昇させるプリチャージ処理を実行するようになっており、
前記始動時チェック処理は、前記第1スイッチ及び前記第2スイッチのうちの一方のスイッチのみをオンにし、この状態で前記コンデンサ電圧が上昇するか否かを判定するリレー異常判定処理を含み、
前記制御装置は、
前記電圧減少判定処理によって前回の前記電圧低下処理の終了時点よりも前記コンデンサ電圧が減少しているとの判定をなしたときに、前記リレー異常判定処理を実行し、
当該リレー異常判定処理によって前記コンデンサ電圧が上昇するとの判定がなされなかったことを条件に、前記プリチャージ処理と前記エンジン始動処理とを実行する
請求項3に記載のハイブリッド車両の駆動システム。 - 前記制御装置は、
前記プリチャージ処理の実行時間が判定実行時間を経過するまでの間に、前記プリチャージ処理の実行に起因する前記コンデンサ電圧の上昇量が判定上昇量以上であること、及び、前記高圧バッテリの直流電圧と前記コンデンサ電圧との差が判定差以下になることの双方が成立したときには、前記プリチャージ処理を終了し、且つ前記エンジンの運転を許容する一方、
前記プリチャージ処理の実行時間が前記判定実行時間を経過しても、前記プリチャージ処理の実行に起因する前記コンデンサ電圧の上昇量が前記判定上昇量以上であること、及び、前記高圧バッテリの直流電圧と前記コンデンサ電圧との差が前記判定差以下になることの少なくとも一方が成立しないときには、前記プリチャージ処理を終了し、且つ前記エンジンの運転を禁止する
請求項4に記載のハイブリッド車両の駆動システム。 - 前記ハイブリッド車両は、前記エンジンの出力軸と前記モータとがクラッチを介して連結されるものであり、
前記電動装置は、前記高圧バッテリの直流電圧を降圧させて低圧バッテリに入力させるDCDCコンバータであり、
前記制御装置は、前記エンジン始動処理において、前記低圧バッテリからの給電によってスタータモータを駆動させることによって前記エンジンを始動させる
請求項1~請求項5のうち何れか一項に記載のハイブリッド車両の駆動システム。
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| JP2017040246A (ja) | 2015-08-21 | 2017-02-23 | 株式会社デンソー | 車両の制御装置 |
| JP2017043274A (ja) | 2015-08-28 | 2017-03-02 | コベルコ建機株式会社 | ハイブリッド建設機械 |
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| CN113386733B (zh) | 2024-02-20 |
| US11541756B2 (en) | 2023-01-03 |
| CN113386733A (zh) | 2021-09-14 |
| US20210284028A1 (en) | 2021-09-16 |
| JP2021142881A (ja) | 2021-09-24 |
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