Fuel injector
AssigneePhinia Delphi Luxembourg Sarl
InventorMichael Peter Cooke
Life of this patent
Estimating the term…
Abstract
A fuel injector for delivering gaseous fuel to an internal combustion engine includes a nozzle body having a nozzle bore. A valve needle is disposed for axial movement within the nozzle bore and includes a valve head engageable with a valve seat to control gaseous fuel delivery through at least one outlet of the fuel injector. The fuel injector includes a first guide including a radially inner contact surface disposed for contacting the valve needle to radially align the valve head with the valve seat. The valve needle includes a first thinned portion that is flexible, so as to allow bending of the valve needle responsive to contact between the first guide and the valve needle
Claims18
A fuel injector for delivering gaseous fuel to an internal combustion engine, the fuel injector comprising:
- a nozzle body having a nozzle bore;
- a valve needle disposed for axial movement within the nozzle bore and including a valve head engageable with a valve seat to control gaseous fuel delivery through at least one outlet of the fuel injector;
- and
- wherein the valve needle comprises a first thinned portion, the first thinned portion being flexible so as to allow lateral bending of the valve needle responsive to compression of the valve head against the valve seat.
A fuel injector for delivering gaseous fuel to an internal combustion engine, the fuel injector comprising:
- a nozzle body having a nozzle bore;
- a valve needle disposed for axial movement within the nozzle bore and including a valve head engageable with a valve seat to control gaseous fuel delivery through at least one outlet of the fuel injector;
- a first guide comprising a radially inner contact surface disposed for contacting the valve needle to radially align the valve head with the valve seat;
- and
- a second guide axially spaced apart from the first guide, the second guide comprising a radially inner contact surface disposed for contacting the valve needle to radially align the valve needle with the nozzle bore;
- wherein the valve needle comprises a thinned portion that is disposed on a side of the second guide that is axially distal to the valve head, the thinned portion being flexible to allow bending of the valve needle responsive to forces imposed upon it during use.
Dependencies are inferred from the claim text.