초록 ▼

An actuator assembly that uses a fluctuating operational pressure generated by an injector oil pump to actuate an EGR valve is disclosed. The operational pressure is used to operate the actuator assembly without being adversely affected by the fluctuating nature of the operational pressure. The actu

An actuator assembly that uses a fluctuating operational pressure generated by an injector oil pump to actuate an EGR valve is disclosed. The operational pressure is used to operate the actuator assembly without being adversely affected by the fluctuating nature of the operational pressure. The actuator assembly includes an actuator housing defining a chamber and an actuator oil inlet. The actuator oil inlet is in fluid communication with the pump outlet. The actuator assembly further includes a slider located within the chamber. The slider is positionable between a first slider position and a second slider position. The slider isolates the actuator oil inlet from the chamber when the slider is located in the first slider position. The actuator oil inlet is in fluid communication with the chamber when the slider is located in the second slider position. The actuator assembly still further includes a movement assembly for moving the slider between a first slider position and a second slider position. The fluctuating operational pressure moves the actuator piston from the first piston position to the second piston position when the slider is located in the second slider position. A method of actuating a valve in an engine assembly is also disclosed.

대표청구항 ▼

[ What is claimed is:] [1.] An engine assembly which includes (1) an injector oil pump having a pump outlet, said injector oil pump generating an operational pressure at said pump outlet, (2) a fuel injector having an injector oil inlet, and an injector piston, wherein (i) said injector oil inlet is

[ What is claimed is:] [1.] An engine assembly which includes (1) an injector oil pump having a pump outlet, said injector oil pump generating an operational pressure at said pump outlet, (2) a fuel injector having an injector oil inlet, and an injector piston, wherein (i) said injector oil inlet is in fluid communication with said pump outlet of said injector oil pump, (ii) operational pressure at said injector oil inlet acts on said injector piston so as to move said injector piston from (A) a low pressure position in which fuel is prevented from being advanced out of said fuel injector, to (B) a high pressure position in which fuel is advanced out of said fuel injector, and (3) an actuator assembly, said actuator assembly comprising:an actuator housing defining a chamber and an actuator oil inlet, said actuator oil inlet being in fluid communication with said pump outlet,a slider located within said chamber, said slider being positionable between a first slider position and a second slider position, wherein (1) said slider isolates said actuator oil inlet from said chamber when said slider is located in said first slider position, and (2) said actuator oil inlet is in fluid communication with said chamber when said slider is located in said second slider position;a movement assembly for moving said slider between a first slider position and a second slider position;an actuator piston located within said chamber, said actuator piston being movable between a first piston position and a second piston position; andwherein said operational oil pressure moves said actuator piston from said first piston position to said second piston position when said slider is located in said second slider position.