Patent ID: 6113000
Filing Date: 2000-09-05
Classification: F02M

Abstract:
A hydraulically actuated fuel injector including:an injector body defining an actuation fluid inlet open to a first actuation fluid cavity, and a second actuation fluid cavity connected to said first actuation fluid cavity via a connection passage, and further defining at least one actuation fluid drain;a source of relatively high pressure actuation fluid connected to said actuation fluid inlet;a relatively low pressure reservoir connected to said at least one actuation fluid drain;a control valve attached to said injector body and being movable between a first position in which said second actuation fluid cavity is open to said first actuation fluid cavity, and a second position in which said second actuation fluid cavity is open to said at least one actuation fluid drain; andan intensifier piston movably mounted in said injector body and having a primary hydraulic surface exposed to fluid pressure in said first actuation fluid cavity and an opposing hydraulic surface exposed to fluid pressure in said second actuation fluid cavity.