JP2008248877A - 内燃機関の失火判定装置および失火判定方法並びに車両 - Google Patents
内燃機関の失火判定装置および失火判定方法並びに車両 Download PDFInfo
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- JP2008248877A JP2008248877A JP2007138714A JP2007138714A JP2008248877A JP 2008248877 A JP2008248877 A JP 2008248877A JP 2007138714 A JP2007138714 A JP 2007138714A JP 2007138714 A JP2007138714 A JP 2007138714A JP 2008248877 A JP2008248877 A JP 2008248877A
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Abstract
【解決手段】モータ回転数Nm1(CA),Nm2(CA)により計算されるダンパの後段側のダンパ後段回転数Nd(CA)とエンジン回転数Ne(CA)とを用いて共振影響成分Nde(CA)を計算し(S210〜S240)、エンジン回転数Ne(CA)から共振影響成分Nde(CA)を減じて判定用回転数Nj(CA)を計算する(S250)。そして、判定用回転数Nj(CA)を用いてエンジンの失火を判定する。これにより、ダンパのねじれに基づく共振が生じていてもエンジンの失火をより精度良く判定することができる。
【選択図】図4
Description
出力軸がねじれ要素を介して後段の後段軸に接続された複数気筒の内燃機関の失火を判定する内燃機関の失火判定装置であって、
前記出力軸の回転数である出力軸回転数を検出する出力軸回転数検出手段と、
前記後段軸の回転数である後段軸回転数を検出する後段軸回転数検出手段と、
前記検出された出力軸回転数と前記検出された後段軸回転数とに基づいて前記ねじれ要素のねじれに基づく共振が前記出力軸の回転数に影響を及ぼす共振影響成分を演算する共振影響成分演算手段と、
前記検出された出力軸回転数から前記演算された共振影響成分を減じて得られる検出用回転数に基づいて前記内燃機関の失火を判定する失火判定手段と、
を備えることを要旨とする。
出力軸がねじれ要素を介して後段軸に接続された複数気筒の内燃機関と、
前記内燃機関の失火を判定する上述のいずれかの態様の本発明の内燃機関の失火判定装置、即ち、基本的には、出力軸がねじれ要素を介して後段の後段軸側に接続された複数気筒の内燃機関の失火を判定する内燃機関の失火判定装置であって、前記出力軸の回転数である出力軸回転数を検出する出力軸回転数検出手段と、前記後段軸の回転数である後段軸回転数を検出する後段軸回転数検出手段と、前記検出された出力軸回転数と前記検出された後段軸回転数とに基づいて前記ねじれ要素のねじれに基づく共振が前記出力軸の回転数に影響を及ぼす共振影響成分を演算する共振影響成分演算手段と、前記検出された出力軸回転数から前記演算された共振影響成分を減じて得られる検出用回転数に基づいて前記内燃機関の失火を判定する失火判定手段と、を備える本発明の内燃機関の失火判定装置と、
を備えることを要旨とする。
出力軸がねじれ要素を介して後段の後段軸に接続された複数気筒の内燃機関の失火を判定する内燃機関の失火判定方法であって、
前記出力軸の回転数である出力軸回転数と前記後段軸の回転数である後段軸回転数とに基づいて前記ねじれ要素のねじれに基づく共振が前記出力軸の回転数に影響を及ぼす共振影響成分を演算すると共に前記出力軸回転数から前記演算した共振影響成分を減じて得られる検出用回転数に基づいて前記内燃機関の失火を判定する、
ことを特徴とする。
Nden(CA)=(K/J)・∫θd(CA) dt (3)
k・θd=J・dω/dt(CA) (5)
クランク角毎にデータにより行なうものとしてもよい。例えば、共振の周波数がクランク角720度の周波数であるときに、処理をクランク角10度毎のデータを用いて行なう場合には式(6)の[k-24]を[k-72]とすればよく、処理をクランク角5度毎のデータを用いて行なう場合には式(6)の[k-24]を[k-144]とすればよい。
G[z]=1/[NSM-(NSM-1)z-24] (7)
y[k]=0.963y[k-1]+(7/8)y[k-24]-(7/8)・0.963y[k-25]+(0.982/8)u[k-1] (8)
G[z]=0.982(1-z-1)/(8-8・0.963z-1-7z-24+7・0.963z-25) (9)
Claims (23)
- 出力軸がねじれ要素を介して後段の後段軸に接続された複数気筒の内燃機関の失火を判定する内燃機関の失火判定装置であって、
前記出力軸の回転数である出力軸回転数を検出する出力軸回転数検出手段と、
前記後段軸の回転数である後段軸回転数を検出する後段軸回転数検出手段と、
前記検出された出力軸回転数と前記検出された後段軸回転数とに基づいて前記ねじれ要素のねじれに基づく共振が前記出力軸の回転数に影響を及ぼす共振影響成分を演算する共振影響成分演算手段と、
前記検出された出力軸回転数から前記演算された共振影響成分を減じて得られる検出用回転数に基づいて前記内燃機関の失火を判定する失火判定手段と、
を備える内燃機関の失火判定装置。 - 前記共振影響成分演算手段は、前記検出された出力軸回転数と前記検出された後段軸回転数とにより前記ねじれ要素のねじれ角を演算すると共に該演算したねじれ角と前記ねじれ要素のバネ定数と前記ねじれ要素より前記内燃機関側の慣性モーメントとに基づいて前記共振影響成分を演算する手段である請求項1記載の内燃機関の失火判定装置。
- 前記共振影響成分演算手段は、前記検出された出力軸回転数から前記検出された後段軸回転数を減じた値の積分計算に基づいて前記ねじれ角を演算し、前記バネ定数と前記慣性モーメントとの定数関係値に前記ねじれ角を乗じたものの積分計算に基づいて前記共振影響成分を演算する手段である請求項2記載の内燃機関の失火判定装置。
- 請求項3記載の内燃機関の失火判定装置は、
前記定数関係値を学習する関係値学習手段を備え、
前記共振影響成分演算手段は、前記関係値学習手段により学習された前記定数関係値を用いて前記共振影響成分を演算する手段である
内燃機関の失火判定装置。 - 前記関係値学習手段は、前記検出された出力軸回転数に基づいて演算される前記出力軸の回転角加速度と前記検出された出力軸回転数と前記検出された後段軸回転数とにより演算される前記ねじれ角とに基づいて前記定数関係値を学習する手段である請求項4記載の内燃機関の失火判定装置。
- 請求項5記載の内燃機関の失火判定装置であって、
前記定数関係値は、前記バネ定数を前記慣性モーメントで除した値であり、
前記関係値学習手段は、前記出力軸の回転角加速度を前記ねじれ角で除した値として前記定数関係値を学習する手段である
内燃機関の失火判定装置。 - 前記関係値学習手段は、前記内燃機関のいずれかの1気筒に対する燃焼噴射量を減じて該気筒の空燃比を他の気筒より大きくした該内燃機関の運転状態である1気筒リーン運転状態を伴って前記定数関係値を学習する手段である請求項4ないし6いずれか記載の内燃機関の失火判定装置。
- 前記共振影響成分演算手段は、前記定数関係値に前記ねじれ角を乗じたものを積分計算して得られるバネ力成分に対して前記検出された出力軸回転数に対応するゲインおよび位相を反映させて前記共振影響成分を演算する手段である請求項3ないし7いずれか記載の内燃機関の失火判定装置。
- 請求項8記載の内燃機関の失火判定装置であって、
前記ゲインは、前記内燃機関の一気筒が失火しているときの失火の周波数をf、前記ねじれ要素の減衰項における定数をC、前記ねじれ要素のバネ定数をKとしたときに、{1+(2πf)2・(C/K)2}1/2、により計算される値であり、
前記位相は、tan-1(2πf・C/K)、により計算される値である、
内燃機関の失火判定装置。 - 前記失火の周波数は、前記出力軸の2回転に対して1回の割合の周波数である請求項9記載の内燃機関の失火判定装置。
- 前記バネ定数は、前記定数関係値に前記ねじれ要素より前記内燃機関側の慣性モーメントの初期値を乗じて得られる値である請求項9または10記載の内燃機関の失火判定装置。
- 前記共振影響成分演算手段は、前記検出された出力軸回転数と前記検出された後段軸回転数とに基づいて演算される成分に共振の周波数については減衰せずに該共振の周波数以外の帯域については減衰するフィルタ処理を施して前記共振影響成分を演算する手段である請求項1ないし11いずれか記載の内燃機関の失火判定装置。
- 前記フィルタ処理は、ハイパスフィルタを用いた処理である請求項12記載の内燃機関の失火判定装置。
- 前記フィルタ処理は、前記共振の周波数の倍数次周波数成分をゲイン=1,位相=0で残す櫛歯状のフィルタを用いた処理である請求項12記載の内燃機関の失火判定装置。
- 出力軸がねじれ要素を介して後段の後段軸に接続された複数気筒の内燃機関と、
前記内燃機関の失火を判定する請求項1ないし14いずれか記載の内燃機関の失火判定装置と、
を備える車両。 - 請求項15記載の車両であって、
前記ねじれ要素より後段の前記後段軸側に動力を出力可能な電動機を備え、
前記後段軸回転数検出手段は、前記電動機の回転数である電動機回転数を検出する手段を兼ねてなり、該検出した電動機回転数を換算することにより前記後段軸回転数を検出する手段である
車両。 - 請求項15または16記載の車両であって、
前記後段軸と車軸側とに接続され、電力と動力の入出力を伴って前記後段軸と前記車軸側とに動力を入出力する電力動力入出力手段を備え、
前記電動機は、前記車軸側に動力を出力可能に接続され、
前記後段軸回転数検出手段は、前記電力動力入出力手段の駆動状態を検出する手段を兼ねてなり、前記検出した電動機回転数と前記検出した駆動状態とに基づく演算により前記後段軸回転数を検出する手段である
車両。 - 出力軸がねじれ要素を介して後段の後段軸に接続された複数気筒の内燃機関の失火を判定する内燃機関の失火判定方法であって、
前記出力軸の回転数である出力軸回転数と前記後段軸の回転数である後段軸回転数とに基づいて前記ねじれ要素のねじれに基づく共振が前記出力軸の回転数に影響を及ぼす共振影響成分を演算すると共に前記出力軸回転数から前記演算した共振影響成分を減じて得られる検出用回転数に基づいて前記内燃機関の失火を判定する、
ことを特徴とする内燃機関の失火判定方法。 - 前記共振影響成分は、前記出力軸回転数から前記後段軸回転数を減じた値の積分計算に基づいて前記ねじれ要素のねじれ角を演算し、前記ねじれ要素のバネ定数と前記ねじれ要素より前記内燃機関側の慣性モーメントとの定数関係値に前記ねじれ角を乗じたものの積分計算に基づいて前記共振影響成分を演算されることを特徴とする請求項18記載の内燃機関の失火判定方法。
- 前記内燃機関のいずれかの1気筒に対する燃焼噴射量を減じて該気筒の空燃比を他の気筒より大きくした該内燃機関の運転状態である1気筒リーン運転状態を伴って、前記出力軸回転数に基づいて演算される前記出力軸の回転角加速度を前記出力軸回転数と前記後段軸回転数とにより演算される前記ねじれ角で除した値として前記定数関係値を学習し、該学習した定数関係値を用いて前記共振影響成分を演算することを特徴とする請求項19記載の内燃機関の失火判定方法。
- 前記定数関係値に前記ねじれ角を乗じたものを積分計算して得られるバネ力成分に対して前記検出された出力軸回転数に対応するゲインおよび位相を反映させて前記共振影響成分を演算することを特徴とする請求項19または20記載の内燃機関の失火判定方法。
- 前記出力軸回転数と前記後段軸回転数とに基づいて演算される成分に共振の周波数については減衰しないハイパスフィルタを用いたフィルタ処理を施して前記共振影響成分を演算することを特徴とする請求項18ないし21いずれか記載の内燃機関の失火判定方法。
- 前記出力軸回転数と前記後段軸回転数とに基づいて演算される成分に前記共振の周波数の倍数次周波数成分をゲイン=1,位相=0で残す櫛歯状のフィルタを用いたフィルタ処理を施して前記共振影響成分を演算することを特徴とする請求項18ないし21いずれか記載の内燃機関の失火判定方法。
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- 2007-05-25 JP JP2007138714A patent/JP4345847B2/ja active Active
- 2007-06-21 EP EP07767316.8A patent/EP2058501B1/en not_active Expired - Fee Related
- 2007-06-21 US US12/373,994 patent/US8001832B2/en not_active Expired - Fee Related
- 2007-06-21 WO PCT/JP2007/062489 patent/WO2008026365A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
---|---|
EP2058501A1 (en) | 2009-05-13 |
JP4345847B2 (ja) | 2009-10-14 |
WO2008026365A1 (fr) | 2008-03-06 |
EP2058501A4 (en) | 2014-08-27 |
US8001832B2 (en) | 2011-08-23 |
EP2058501B1 (en) | 2019-06-19 |
US20090308145A1 (en) | 2009-12-17 |
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