Injection system for an internal combustion engine
AssigneeAVL Gesellschaft fur Verbrennungskraftmaschinen und Messtechnik m.b.H.
InventorsHerwig Ofner, Peter Herzog
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Abstract
To provide an injection system for an internal combustion engine operating on self-igniting liquefied gas as a fuel, and to minimize cavitation and related problems of fuel delivery as well as wear, the fuel tank is configured as a low-pressure storage tank which is connected to a pressure control unit maintaining a constant interior pressure at a level above that of the vapor pressure of the liquefied gas, preferably at 6 to 30 bar, approximately, and further the injection system is configured as a leakage-free system.
Claims10
Injection system for an internal combustion engine operating on self-igniting liquefied gas as a fuel, comprising an injection unit per cylinder for direct injection of the fuel into a combustion chamber, a fuel tank, a fuel delivery device for drawing fuel comprising self-igniting liquefied gas from said fuel tank and delivering said fuel to said injection unit, said fuel tank being configured as a low-pressure storage tank, and a pressure control unit connected to said storage tank for maintaining a constant interior pressure within said storage tank at a level above the vapor pressure of said liquefied gas, said pressure control unit including a gas pumping unit which is connected to an interior of said storage tank via at least one check valve, and wherein the injection system is leakage-free.
Dependencies are inferred from the claim text.