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JP2000297645A Expired / Lapsed JP ⏱️ 0.0 years remaining

Direct injection diesel engine

Assignee: Nissan Motor Co Ltd
•
Filing: 1999-04-16
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Granted: —
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Expires: 2019-04-16
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Abstract

Abstract Translated from Japanese (57)【要約】 【課題】機関の熱効率を高めつつ、排気性能を向上させ る。 【解決手段】ピストン3、シリンダ2、シリンダヘッド 5とにより燃焼室6を画成し、この燃焼室6に直接的に 燃料噴射する燃料噴射ノズル12を備えた直噴式ディー ゼルエンジンである。そして、ピストン3の頂面に浅い キャビティ4を形成し、燃焼室6に臨んでシリンダ軸線 と略同軸的に配置した燃料噴射ノズル12からの燃料噴 霧の開き角を大きく、このましくは150゜以上に設定 する。これにより、燃焼室内の縦方向平均速度を小さく する一方で、燃料噴霧の到達距離を確保し、微粒化を図 り、燃費と排気性能を向上させられる。 (57) [Abstract] [PROBLEMS] To improve exhaust performance while improving thermal efficiency of an engine. A direct injection diesel engine includes a combustion chamber (6) defined by a piston (3), a cylinder (2), and a cylinder head (5), and a fuel injection nozzle (12) for directly injecting fuel into the combustion chamber (6). Then, a shallow cavity 4 is formed on the top surface of the piston 3, and the opening angle of the fuel spray from the fuel injection nozzle 12 facing the combustion chamber 6 and arranged substantially coaxially with the cylinder axis is increased. Set above. As a result, while reducing the average longitudinal velocity in the combustion chamber, the reaching distance of the fuel spray is ensured, atomization is achieved, and fuel efficiency and exhaust performance can be improved.

Inventors

  • 👤 Hiroshi Ogawa
  • 👤 弘志 小川
  • 👤 Shuji Kimura
  • 👤 修二 木村

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-01 18:50
CPC Classifications
F; F02; F02B; F02B2275/00; F02B2275/14; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12

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