Method for the formation of a combustible fuel/air mixture
AssigneeDaimlerChrysler AG
InventorsDietmar Bertsch, Martin Bezner, Uwe Schaupp, Helmut Schorn, Jörg Sievert
Life of this patent
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Abstract
A method for the formation of a combustible fuel/air mixture in a combustion chamber of a direct-injection internal combustion engine with an injection nozzle, which has a closure body includes the steps of injecting at least two partial quantities of fuel into the combustion chamber and moving the closure body of the injection nozzle into its closed position after the injection of each of the partial quantities of fuel.
Claims17
A method for forming a combustible fuel/air mixture in a combustible chamber of a direct-injection internal combustion engine having an injection nozzle, the injection nozzle including a closure body, comprising the steps of:
- injecting in a single combustion cycle at least two partial quantities of fuel into the combustion chamber via the injection nozzle;
- and
- moving the closure body of the injection nozzle into a closed position after injecting each of the partial quantities of fuel.
A method for forming a combustible fuel/air mixture in a combustible chamber of a direct-injection internal combustion engine having an injection nozzle, the injection nozzle including a closure body, comprising the steps of:
- injecting at least two partial quantities of fuel into the combustion chamber via the injection nozzle;
- and
- moving the closure body of the injection nozzle into a closed position after the injection of each partial quantity of fuel, wherein a first partial quantity of fuel includes 70% to 99% of a total quantity of fuel, a second partial quantity of fuel being injected after the injection of the first partial quantity of fuel after one of 0.05 ms to 0.4 ms and 1° to 5° of crank angle, an injection cycle being completed between 50° and 5° of crank angle before a top dead center position.
A cylinder head for an internal combustion engine having a combustion chamber, comprising:
- a spark plug provided in the combustion chamber;
- an injection nozzle having a closure element;
- and
- an actuator configured to move the closure element;
- the cylinder head being configured to perform a method for forming a combustible fuel/air mixture in the combustion chamber, the method including the steps of:
- injecting in a single combustion cycle at least two partial quantities of fuel into the combustion chamber via the injection nozzle;
- and
- moving the closure element of the injection nozzle into a closed position after injecting each of the partial quantities of fuel;
- wherein a nozzle opening of the injection nozzle is disposed at a distance of 1 mm to 8 mm from a roof of the combustion chamber and at a distance of 10 mm to 15 mm from the spark plug, and wherein an injection pressure of the injection nozzle varies between one of 100 bar to 300 bar and 150 bar to 250 bar.
Dependencies are inferred from the claim text.