초록 ▼

This invention relates to a novel hydraulically actuated fuel injector for an internal combustion engine. More particularly, the application pertains to a hydraulically actuated gaseous injector for injecting main fuel and optional pilot fuel into an internal combustion engine at different times at

This invention relates to a novel hydraulically actuated fuel injector for an internal combustion engine. More particularly, the application pertains to a hydraulically actuated gaseous injector for injecting main fuel and optional pilot fuel into an internal combustion engine at different times at controlled pressure. A hydraulically actuated fuel injector for a piston displacement engine comprising: (a) an injector which is actuated by an actuator means and injects fuel into the engine at predetermined times; (b) a means for introducing hydraulic oil into said injector; (c) means for pressurizing said hydraulic oil; (d) means for opening a fuel inlet means and injecting the fuel into the engine upon the pressure of the hydraulic oil reaching a predetermined level; and (e) a means for preventing the pressure of the hydraulic oil from rising above the predetermined level.

대표청구항 ▼

[ What is claimed is:] [1.] A hydraulically actuated fuel injection apparatus for injecting a high pressure compressible main fuel into an internal combustion engine, said apparatus comprising:(a) an injector housing defining a valve chamber with an injector nozzle at an end proximate to a combustio

[ What is claimed is:] [1.] A hydraulically actuated fuel injection apparatus for injecting a high pressure compressible main fuel into an internal combustion engine, said apparatus comprising:(a) an injector housing defining a valve chamber with an injector nozzle at an end proximate to a combustion chamber, said injector nozzle having at least one opening into the combustion chamber;(b) a displaceable injection valve within said valve chamber and biased by a spring into seating against a valve seat formed in the valve chamber;(c) a first port for introducing the main fuel into the valve chamber;(d) a second port for introducing a hydraulic fluid into the valve chamber;e) an actuator mechanism for generating a rising hydraulic pressure pulse in the hydraulic fluid to displace the injection valve in a direction opposite to the flow of main fuel upon the hydraulic fluid reaching a predetermined pressure level, thereby injecting the main fuel into the combustion chamber;(f) a pressure limiting device located within the injector housing for relieving the pressure of the hydraulic fluid upon the pressure reaching a predetermined level.