초록 ▼

An internal combustion engine includes hydraulically-controlled cylinder deactivation and has an engine block with a plurality of cylinders formed therein. At least one-half of the cylinders are deactivatable by collapsible lifters. An individual hydraulic circuit module is positioned adjacent each

An internal combustion engine includes hydraulically-controlled cylinder deactivation and has an engine block with a plurality of cylinders formed therein. At least one-half of the cylinders are deactivatable by collapsible lifters. An individual hydraulic circuit module is positioned adjacent each deactivatable cylinder. Each hydraulic circuit module includes a valve and is configured to receive a supply of oil from the engine block and to selectively provide pressurized oil to the respective collapsible lifters for cylinder deactivation. A solid cover plate is positioned adjacent each cylinder which is not deactivatable.

대표청구항 ▼

An internal combustion engine includes hydraulically-controlled cylinder deactivation and has an engine block with a plurality of cylinders formed therein. At least one-half of the cylinders are deactivatable by collapsible lifters. An individual hydraulic circuit module is positioned adjacent each

An internal combustion engine includes hydraulically-controlled cylinder deactivation and has an engine block with a plurality of cylinders formed therein. At least one-half of the cylinders are deactivatable by collapsible lifters. An individual hydraulic circuit module is positioned adjacent each deactivatable cylinder. Each hydraulic circuit module includes a valve and is configured to receive a supply of oil from the engine block and to selectively provide pressurized oil to the respective collapsible lifters for cylinder deactivation. A solid cover plate is positioned adjacent each cylinder which is not deactivatable. f spaced chokes are evenly spaced within said control portion. 4. The apparatus according to claim 2 wherein each of said plurality of chokes includes a longitudinal opening formed therethrough for passage of the main core flow. 5. The apparatus according to claim 1 wherein a circumferential choke within the control portion generates a turbulent free shear layer downstream thereof. 6. The apparatus according to claim 2 wherein said plurality of circumferential chokes generate sequentially reduced turbulent free shear layers in a direction toward said launch tube. 7. The apparatus according to claim 2 wherein said plurality of circumferential chokes are connected by at least one longitudinal rib member. 8. The apparatus according to claim 7 wherein said at least one longitudinal rib member is integrally connected to said plurality of circumferential chokes. 9. The apparatus according to claim 8 wherein said at least one longitudinal rib member and said plurality of circumferential chokes are formed as a one-piece construction. 10. The apparatus according to claim 9 wherein a plurality of longitudinal rib members are formed as a one-piece construction with said plurality of circumferential chokes. 11. The apparatus according to claim 10 wherein said plurality of longitudinal rib members are spaced from each other around said plurality of circumferential chokes. 12. A fluid pressure control apparatus comprising: an elongated housing having an opening at a first end thereof, an opening at a second end thereof, an inner peripheral surface and a fluid flow passageway therethrough; and a plurality of choke members fixed to the inner peripheral surface of said housing, each said plurality of choke members being spaced from an adjacent choke member and projecting into the fluid flow passageway of said longitudinal housing for interrupting at least a portion of the fluid flow therethrough; said plurality of choke members sequentially produce a reduced turbulent free shear fluid layer within said elongated housing. 13. The apparatus according to claim 12 wherein said plurality of spaced chokes are evenly spaced within said housing. 14. The apparatus according to claim 12 wherein a single one of said plurality of circumferential chokes generates a turbulent free shear layer downstream thereof. 15. The apparatus according to claim 12 wherein said plurality of circumferential chokes are connected by at least one longitudinal rib member. 16. The apparatus according to claim 12 wherein said at least one longitudinal rib member is integrally connected to said plurality of circumferential chokes. 17. The apparatus according to claim 16 wherein said at least one longitudinal rib member and said plurality of circumferential chokes are formed as a one-piece construction. 18. The apparatus according to claim 17 wherein a plurality of longitudinal rib members are formed as a one-piece construction with said plurality of circumferential chokes. 19. The apparatus according to claim 18 wherein said plurality of longitudinal rib members are spaced from each other around said plurality of circumferential chokes. 20. A fluid pressure control apparatus comprising: an elongated housing having an opening at a first end thereof, an opening at a second end thereof, an inner peripheral surface and a fluid flow passageway therethrough; a plurality of choke members fixed to the inner peripheral surface of said housing, each said plurality of choke members being spaced from an adjacent choke member and projecting into the fluid flow passageway of said longitudinal housing for interrupting at least a portion of the fluid flow therethrough and serially reducing fluid momentum of a flow in the fluid flow passageway; and at least one longitudinal rib member connecting said plurality of choke members, said at least one longitudinal rib member and said plurality of choke members being formed of a one-piece construction. 21. The apparatus according to claim