Title:
筒内噴射式内燃機関
Document Type and Number:
Japanese Patent JP3611471
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To attain good lean-burning not depending on the engine speed at low and medium load driving even of a flat type piston in a spark ignition engine to inject fuel directly to a cylinder in an internal combustion engine. SOLUTION: An internal combustion engine is provided with an ignition plug 6 and a fuel injection valve 5 to inject fuel directly in a cylinder. A cylinder center axis is defined as Z axis, an axis crossing with the Z axis vertically and passing through a gravitational point of the cylinder and a point directly under the fuel ignition valve 5 is defined as X axis, and an axis passing through the gravitational point of the cylinder, which is perpendicular to the X axis and the Z axis is defined as Y axis. At that time, airflow turning around the center of the axis is formed in a cylinder 1. Injected fuel 16 is set so that the fuel injection quantity control can be carried out. In this case, air-fuel ratio becomes higher than stoichiometric air-fuel ratio under an atomization state where the spray angle perpendicular to the XZ plane becomes narrower than the spray angle parallel to the XZ plane in the low and medium load driving. Fuel is injected during the periods from the latter half of the intake stroke to the former half of the compression stroke.
Inventors:
Yusuke Kihara
Yoshihiro Sukegawa
Takuya Ishiga
Takuya Shiraishi
Yoshihiro Sukegawa
Takuya Ishiga
Takuya Shiraishi
Application Number:
JP2001399A
Publication Date:
January 19, 2005
Filing Date:
January 28, 1999
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
F02B23/10; F02B31/00; F02D41/02; F02D41/04; F02M51/00; F02M61/14; F02M61/18; F02B75/12; (IPC1-7): F02B23/10; F02B31/00; F02D41/02; F02D41/04; F02M51/00; F02M61/14; F02M61/18
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Attorney, Agent or Firm:
Katsuo Ogawa
Akio Takahashi
Kyosuke Tanaka
Akio Takahashi
Kyosuke Tanaka