US 5,960,766 A · Method of operating an internal combustion engine

Abstract

The invention relates to a method of operating an internal combustion engine and to an internal combustion engine respectively. In accordance with the method of operating an internal combustion engine in accordance with the invention fuel is injected into a combustion chamber so that it is reflected by a piston, as a result of which charge stratification occurs in the combustion chamber. Fresh air is inducted slightly throttled or not throttled at all into the combustion chamber irrespective of the loading condition of the internal combustion engine so that the exhaust gases from the previous working stroke are completely swept from the combustion chamber. The output of the internal combustion engine is generated substantially via the injected amount of fuel.Dueto the method in accordance with the invention charge stratification is caused in which burning of the fuel/air mixture is ideal. The internal combustion engine in accordance with the invention thus features smooth running for ideal emission values.

Claims31

Dependent claims

A method of operating an internal combustion engine including at least one cylinder (2) in which a piston (3) is movably arranged, said cylinder (2) being closed off by a cylinder head (4) and a combustion chamber (5) being defined by an inner surface area (6) of said cylinder (2), an inner surface area (7) of said cylinder head (4) and a piston crown (8) of said piston (3), comprising the steps of:

incorporating in the piston crown (8) a bowl (17) arranged in a region in which injected fuel impinges on the bottom (8) of the bowl (17);
defining the bowl (17) by a defining wall (19) so that the injected fuel is reflected decelerated by the bowl (17) and atomized;
inducting fresh air into the cylinder slightly throttled or non-throttled so that exhaust gases from the previous working stroke are totally swept from the combustion chamber (5);
and
injecting fuel directly into the combustion chamber (5) so that the injected fuel is reflected by the piston crown (8).

2 more elements

incorporating in the piston crown (8) a bowl (73) arranged in a region in which injected fuel impinges on the bottom (74) of the bowl (73);
arranging in the cylinder head an injector nozzle (14) and a spark plug (12);
sloping the bottom (74) of the bowl (73) down in the direction of the spark plug (12);
defining the bowl (73) by a defining wall (75);
configuring the transition between the bowl bottom (74) and the defining wall (75) rounded so that fuel injected in the bowl (73) is reflected along the bowl bottom (73) and the defining wall (75) and non-decelerated back into the combustion chamber (5) as a secondary jet of fuel (16b);
inducting fresh air into the cylinder (2) slightly throttled or non throttled so that exhaust gases from the previous working stroke are totally swept from the combustion chamber (5);
and
injecting fuel directly into the combustion chamber (5) so that the injected fuel is reflected by the piston crown (8).

5 more elements

Dependencies are inferred from the claim text.

Method of operating an internal combustion engine

Life of this patent

Method of operating an internal combustion engine

Life of this patent

Abstract

Claims31