Fuel injection devices
AssigneeTdc Products B.V.
InventorTjeerd Sijtse Ijsselstein
Life of this patent
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Abstract
An improved fuel injection device for internal combustion engines comprising a slidable (pilot) valve instead of a needle valve principle. The valve does not comprise a seat, so, even in the case of a spring-loaded embodiment of the valve there is no risk of hammering of the valve on a seat with the pertaining generation of noise. The improved fuel injector allows a larger nozzle diameter and, therefore, a larger number of nozzle holes, if required or deemed useful. For rotating embodiments of the fuel injector, the valve or at least its spring, in the case of a spring-loaded embodiment of the valve, can be located in the static section of the rotating fuel injector, thus eliminating the balancing problem of prior art rotating fuel injectors which comprise a spring in the rotating section.
Claims17
An injection device for the injection of a fuel into a combustion chamber of an internal combustion engine, wherein the device comprises a sleeve and a valve, and wherein the valve is configured slidable in an axial direction in the sleeve, wherein the sleeve comprises a number of stacked rows of nozzle holes, wherein the number of rows of nozzle holes is selected in the range of 3-10, wherein each row comprises an array of nozzle holes along a circumference of the sleeve, wherein the device is configured to control the number of rows of nozzle holes through which fuel may enter the combustion chamber by axially positioning the valve, wherein the device is configured for controlling a number of nozzle holes through which fuel may enter the combustion chamber dependent on a power demand, wherein the nozzle holes have a diameter selected equal to or less than 50 μm.
Dependencies are inferred from the claim text.