Daimler Chrysler Ag

Daimler-benz Ag

Immanuel Kutschera

Jorg Abthoff

Ludwig Fricker

Michael Kramer

Manfred Fortnagel

Michael Kuhn

Hartmut Engels

Ulrich Engel

Martin Mutterer

Claus Mumm

Bernward Vethacke

A cylinder head for internal combustion engines, particularly diesel engines with direct fuel injection, which has two inlet valves per cylinder each including spin-inducing means for producing spin flow about the longitudinal axis of the associated cylinder. Having regard to the direction of spin, the leading inlet valve is provided with an eccentric, crescent-shaped chamfer facing in the general direction of spin flow, and the trailing inlet valve includes flow blocking means for preventing combustion air from exiting the trailing inlet valve in a direction opposite to the direction of spin flow.

Cylinder head for internal combustion engines

The invention relates to a direct fuel injection method for a diesel engine in which a preset quantity of fuel is introduced into a combustion space via a fuel injection nozzle in a preinjection and in a main injection which is separate from the preinjection. To achieve a short ignition delay with lowest possible specific fuel consumption during this process, the beginning of the preinjection occurs within the range of 10.degree.-16.degree. or of 20.degree.-30.degree. crank angle before top dead center, depending on speed, and the beginning of the main injection occurs within the range of 2.degree. after top dead center to 15.degree. before top dead center, the interval between the end of the preinjection and the beginning of the main injection being within the range of 3.degree. to 14.degree. or of 3.degree. to 26.degree. crank angle before top dead center and the preinjection quantity is 10% to 20% or 1% to 5% of the quantity of fuel preset in each case, depending on load.

Direct fuel injection method for a diesel engine

Growing community of inventors

Stuttgart, Germany

Immanuel Kutschera