F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
123/140
F02M 51/06 (2006.01) F02M 61/10 (2006.01) F02M 61/16 (2006.01) F02M 61/18 (2006.01) F02B 3/06 (2006.01)
Patent
CA 1199242
ABSTRACT A fuel injection valve for a diesel engine comprises a fuel delivery nozzle body (14) formed with a central bore (16), a fuel spray orifice (21) co-axial with said bore (16), a frusto-conical valve seat (20) co-axial with, and tapering inwards towards said orifice (20), and a fuel supply passage (25) that supplies fuel to said valve seat (20) and orifice (21); and a needle member (15) that is slidably received in said bore (16) and has a cylindrical end portion (17) of reduced diameter terminating in a conical tip (18) that co- operates with said valve seat (20) to open and close said orifice (21): characterised in that said nozzle body (14) is formed with a chamber (16') that communicates with said fuel supply passage (25) and into which a shoulder portion (15') of the needle member (15) projects so that pressurisation of the fuel moves the needle member (15) axially to disengage its conical end from the valve seat (20), and in that the nozzle body (14) is formed with a plurality of fuel supply passages (27) that extend tangentially of, and open into, a cylindrical portion (19) of said central bore (16) adjacent to the wider end of the valve seat (20) and in which said cylindrical end portion (17) of the needle member (15) slides to open said passages (21) as the needle member (15) moves axially to disengage the valve seat (20).
440876
Bacon David M.
Shaw Richard T.
Gowling Lafleur Henderson Llp
Perkins Engines Group Limited
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