JP2014109198A - 天然ガスエンジン及び天然ガスエンジンの運転方法 - Google Patents
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Abstract
【解決手段】天然ガス燃料Cを吸気系通路12に噴射し、着火源の軽油燃料fをシリンダ内に噴射して、天然ガス燃料Cの着火に際して火花点火システムを使用しないで、シリンダ内に噴射した軽油燃料fの圧縮着火により天然ガス燃料Cを燃焼させる天然ガスエンジン10において、吸気行程中のシリンダ内に排気ガスGを導入する排気導入機構を備えて構成する。
【選択図】図1
Description
11 エンジン本体
12 吸気通路(吸気系通路)
13 排気通路(排気系通路)
13a バイパス通路
14 EGR通路
15 ターボ式過給器(ターボチャージャ)
16 インタークーラー
17 吸気シャッタ(吸気スロットル)
18 排気ガス浄化装置(後処理装置)
18d 小型の連続再生式DPF
19 EGRクーラー
20 EGR弁
30 天然ガス供給システム
31 天然ガスタンク(CNGタンク)
35 CNG噴射インジェクタ(天然ガス燃料噴射装置)
41 λセンサ(空気過剰率センサ)
42 排気シャッタ(排気絞り弁)
43 排気流路切替弁
51 制御装置(ECU)
52 アクセルセンサ
53 エンジン回転速度センサ
61 シリンダヘッド
62 点火プラグ
65 吸気系通路
67 排気系通路
68 排気バルブ
69 軽油燃料インジェクタ(軽油燃料噴射装置)
70 シリンダ
A 吸入空気
C 天然ガス燃料
f 軽油燃料
G 排気ガス
Ge EGRガス
λ 空気過剰率
Claims (6)
- 天然ガス燃料を吸気系通路に噴射し、着火源の軽油燃料をシリンダ内に噴射して、天然ガス燃料の着火に際して火花点火システムを使用しないで、シリンダ内に噴射した軽油燃料の圧縮着火により天然ガス燃料を燃焼させる天然ガスエンジンにおいて、 吸気行程中のシリンダ内に排気ガスを導入する排気導入機構を備えて構成したことを特徴とする天然ガスエンジン。
- シリンダ内に噴射する軽油燃料の量を、エンジンの全運転領域で、アイドル運転用の軽油燃料量とし、エンジン出力の増減は、天然ガス燃料の量の増減で行うように構成されたことを特徴とする請求項1に記載の天然ガスエンジン。
- 前記排気導入機構の作動を行う運転状態において、前記吸気系通路に設けられた吸気シャッタによる吸気絞り制御を併用するように構成されたことを特徴とする請求項1又は2に記載の天然ガスエンジン。
- 前記排気導入機構の作動を行う運転状態において、排気系通路に設けられた排気シャッタによる排気絞り制御を併用するように構成されたことを特徴とする請求項1〜3のいずれか1項に記載の天然ガスエンジン。
- 天然ガス燃料を吸気系通路に噴射し、着火源の軽油燃料をシリンダ内に噴射して、天然ガス燃料の着火に際して火花点火システムを使用しないで、シリンダ内に噴射した軽油燃料の圧縮着火により天然ガス燃料を燃焼させると共に、吸気行程中のシリンダ内に排気ガスを導入する排気導入機構を備えて構成された天然ガスエンジンの運転方法において、
シリンダ内に噴射する軽油燃料の量を、該天然ガスエンジンの全運転領域で、アイドル運転用の軽油燃料量とし、エンジン出力の増減は、天然ガス燃料の量の増減で行うことを特徴とする天然ガスエンジンの運転方法。 - 前記排気導入機構の作動を行う運転状態において、前記吸気系通路に設けられた吸気シャッタによる吸気絞り制御と、排気系通路に設けられた排気シャッタによる排気絞り制御を併用する制御を行うことを特徴とする請求項5に記載の天然ガスエンジンの運転方法。
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JP2012262543A JP6089639B2 (ja) | 2012-11-30 | 2012-11-30 | 天然ガスエンジン及び天然ガスエンジンの運転方法 |
PCT/JP2013/080278 WO2014084023A1 (ja) | 2012-11-30 | 2013-11-08 | 天然ガスエンジン及び天然ガスエンジンの運転方法 |
EP13858625.0A EP2927462A4 (en) | 2012-11-30 | 2013-11-08 | NATURAL GAS ENGINE AND OPERATING METHOD FOR NATURAL GAS ENGINE |
US14/646,963 US9677465B2 (en) | 2012-11-30 | 2013-11-08 | Natural gas engine and operation method for natural gas engine |
CN201380061749.0A CN104870784A (zh) | 2012-11-30 | 2013-11-08 | 天然气发动机以及天然气发动机的运转方法 |
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WO2017069120A1 (ja) * | 2015-10-19 | 2017-04-27 | いすゞ自動車株式会社 | 天然ガスエンジン及び天然ガスエンジンの遮熱方法 |
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JP2017008900A (ja) * | 2015-06-26 | 2017-01-12 | いすゞ自動車株式会社 | 天然ガスエンジン及び天然ガスエンジンの運転方法 |
WO2017069120A1 (ja) * | 2015-10-19 | 2017-04-27 | いすゞ自動車株式会社 | 天然ガスエンジン及び天然ガスエンジンの遮熱方法 |
JP2017078337A (ja) * | 2015-10-19 | 2017-04-27 | いすゞ自動車株式会社 | 天然ガスエンジン及び天然ガスエンジンの遮熱方法 |
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EP2927462A4 (en) | 2016-08-17 |
EP2927462A1 (en) | 2015-10-07 |
WO2014084023A1 (ja) | 2014-06-05 |
CN104870784A (zh) | 2015-08-26 |
JP6089639B2 (ja) | 2017-03-08 |
US20150300247A1 (en) | 2015-10-22 |
US9677465B2 (en) | 2017-06-13 |
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