Fuel injection machine

Japanese Patent JP6234583

B2

The invention relates to a fuel injector for internal combustion engines for injecting fuel at high pressure, comprising a pressure chamber formed in an injector body, in which pressure chamber a nozzle needle is arranged in a longitudinally movable manner, which nozzle needle has a cone region tapered in a combustion chamber direction and a pin region having a constant diameter d23 at a combustion-chamber end of the nozzle needle. The injector body has a substantially conical nozzle needle seat, from which a first injection opening extends, and a blind hole, which adjoins the nozzle needle seat on the combustion chamber side. The blind hole has a cylindrical segment, which has the diameter d31, and a hole base, from which a second injection opening extends. The cone region of the nozzle needle interacts with the nozzle needle seat and thereby opens and closes the first injection opening and the second injection opening with respect to the pressure chamber. During a partial stroke of the nozzle needle, the first injection opening and the second injection opening are connected to each other by means of a throttle gap, which is formed in the blind hole between the pin region and the wall of the blind hole, and the throttle gap remains constant at least over the partial stroke of the nozzle needle.

Junderhauf Gehart
Koeninger Andreas

JP2016537197A

November 22, 2017

August 05, 2014

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Robert Bosch GmbH

F02M61/18; F02M45/08; F02M61/10

JP2002322957A
JP10281038A
JP2003049751A
JP54007020A
JP54111012A
JP63036662U
JP10141179A
JP11280610A
JP2000145586A
JP2005517122A
JP2006063951A

US5947389

Oba Reiji
Hajime Takahashi

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