US 12,241,442 B2
Fuel injection device
Alexander Fuchs, Adnet (AT); Christoph Eduard Kammerer, Linz (AT); Helmut Giessauf, Salzburg (AT); Martin Bernhaupt, Oberalm (AT); and Walter Walkner, Hallein (AT)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 18/260,689
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Dec. 27, 2021, PCT No. PCT/EP2021/087665
§ 371(c)(1), (2) Date Jul. 7, 2023,
PCT Pub. No. WO2022/148679, PCT Pub. Date Jul. 14, 2022.
Claims priority of application No. 10 2021 200 154.8 (DE), filed on Jan. 11, 2021.
Prior Publication US 2024/0117784 A1, Apr. 11, 2024
Int. Cl. F02M 63/02 (2006.01); F02M 37/00 (2006.01)
CPC F02M 63/0275 (2013.01) [F02M 37/0041 (2013.01); F02M 2200/28 (2013.01); F02M 2200/40 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A fuel injection device (100) for a compression-ignition engine, the fuel injection device comprising a first storage unit (20) configured to be supplied with fuel by at least one high-pressure pump (16), the first storage unit (20) being arranged inside the high pressure pump (16), a first connecting line (26) from the first storage unit (20) to a second storage unit (30), and a second connecting line (40) from the second storage unit (30) to a fuel injector (50), wherein a third storage unit (42) is arranged inside a housing (52) of the fuel injector (50), which third storage unit is arranged separately from a high pressure chamber (44), in which an injection element (46) is arranged in a manner so as to be moved by lifting, and wherein a storage volume of the third storage unit (42) is a volume, corresponding to a plurality of nominal injection amounts of the fuel injector (50),
wherein a first throttle device (36) restricting a flow rate is arranged between the first storage unit (20) and the second storage unit (30), and a second throttle device (38) restricting a flow rate is arranged between the second storage unit (30) and the third storage unit (42), and
wherein a flow restrictor (34) distinct from the first throttle device (36) is arranged upstream of the second storage unit (30).