JP2005337119A - エンジンの燃料配管構造 - Google Patents
エンジンの燃料配管構造 Download PDFInfo
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Abstract
この発明は、高圧燃料噴射システムの蓄圧管の構造において、耐圧性を高めつつも、コストの増加を防ぐことができるエンジンの燃料配管構造を提供することを目的とする。
【解決手段】
本蓄圧管1は、内部に蓄圧燃料通路21を設けた内筒部材2、その内筒部材2の外側に配置した外筒部材3、右端部に螺合固定したプレッシャーセンサ4、左端部に螺合固定したプレッシャーレギュレータ5、貫通固定した4つの噴射弁用コネクタ6…、同様に貫通固定した2つのインレットコネクタ7,7、及び、内筒部材2と外筒部材3の間の密封室8に封入した封入液体9で構成している。
【選択図】 図1
Description
この実施態様によるエンジンの燃料配管構造は、燃料供給ポンプから供給される燃料を蓄圧し、燃料噴射弁に高圧燃料を供給する蓄圧管1を備えたエンジンの燃料配管構造であって、前記蓄圧管1を、内部に蓄圧燃料通路21を設けた内筒部材2と、該内筒部材2の径方向の変形を許容するように所定間隔を空けて内筒部材2の外側に配置した外筒部材3と、該内筒部材2と該外筒部材3の両端部に固定され、内筒部材2の外周面と外筒部材3の内周面と共に密封室8を画成するプレッシャーセンサ4及びプレッシャーレギュレータ5と、該密封室8に密封した略常圧の封入液体9とで構成したものである。
この発明の封止部材は、実施態様のプレッシャーセンサ4及びプレッシャーレギュレータ5に対応し、
発明の略常圧の液体は、実施態様の封入液体9に対応するも、
この発明は、前述の実施態様の構成のみに限定されるものではなく、様々なエンジンの燃料配管構造に適用する実施態様を含むものである。
2…内筒部材
3…外筒部材
4…プレッシャーセンサ(封止部材)
5…プレッシャーレギュレータ(封止部材)
8…密封室
9…封入液体(液体)
Claims (5)
- 燃料供給ポンプから供給される燃料を蓄圧し、燃料噴射弁に高圧燃料を供給する蓄圧管を備えたエンジンの燃料配管構造であって、
前記蓄圧管を、内部に蓄圧燃料通路を設けた内筒部材と、
該内筒部材の径方向の変形を許容するように所定間隔を空けて内筒部材の外側に配置した外筒部材と、
該内筒部材と該外筒部材の両端部に固定され、内筒部材の外周面と外筒部材の内周面と共に密封室を画成する封止部材と、
該密封室に密封した略常圧の液体とで構成した
エンジンの燃料配管構造。 - 前記燃料ポンプ又は燃料噴射弁に接続されるコネクタを、前記蓄圧燃料通路と連通するように、前記内筒部材及び前記外筒部材に貫通配置し、
該内筒部材に対して螺合固定で固定し、
該外筒部材に対して溶接固定で固定した
請求項1記載のエンジンの燃料配管構造。 - 前記封止部材の少なくとも一方を、圧力調整部材、又は圧力検出部材で構成した
請求項1又は2記載のエンジンの燃料配管構造。 - 前記蓄圧管に固定される複数のコネクタの固定部を、全て内筒部材及び外筒部材の同一側面に設定し、
前記内筒部材及び外筒部材を、押出パイプ材又は引抜パイプ材で形成した
請求項1〜3記載のエンジンの燃料配管構造。 - 前記内筒部材の外周部の一側面に、径方向に突出した肉厚部を形成し、
該肉厚部に、前記コネクタの固定を行う固定部を設定した
請求項4記載のエンジンの燃料配管構造。
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