초록 ▼

A valve deactivator assembly (47) especially for use with a push rod (23) type of valve gear train, the deactivator assembly (47) preferably comprising a roller follower, engaging the engine cam (19). The deactivator includes an outer body (53), driven by the cam (19), and an inner body (61) which t

A valve deactivator assembly (47) especially for use with a push rod (23) type of valve gear train, the deactivator assembly (47) preferably comprising a roller follower, engaging the engine cam (19). The deactivator includes an outer body (53), driven by the cam (19), and an inner body (61) which transmits cyclical motion to the push rod (23), when the body members are latched (FIG. 2). The inner body member (61) defines a latch chamber (93), oriented radially, and aligned therewith is a circular opening (97) defined by the outer body member (53). A compression spring (107) biases a latch member (99) toward the latched condition (FIG. 2). An end surface (111) of the latch member (99) is in communication with an engine oil passage (P), and a relatively higher pressure in the passage biases the latch member (99) toward an unlatched condition (FIG. 3), in opposition to the compression spring (107). As a result of the invention, valve deactivation may be provided in a roller follower without substantial engine redesign or substantial increase in the overall size of the roller follower.

대표청구항 ▼

[What is claimed is:] [1.](a) an outer body member defining a longitudinal axis, and disposed for engagement with said drive means and for said cyclical motion therewith;(b) an inner body member disposed within said outer body member and reciprocable relative thereto, said inner body member includin

[What is claimed is:] [1.](a) an outer body member defining a longitudinal axis, and disposed for engagement with said drive means and for said cyclical motion therewith;(b) an inner body member disposed within said outer body member and reciprocable relative thereto, said inner body member including means operable to transmit said cyclical motion to the remainder of said valve gear means when said outer and inner body members are in a latched condition, said outer body member being generally cylindrical and hollow, and said inner body member being generally cylindrical and hollow, said outer and said inner body members defining therebetween a generally annular chamber;(c) a latch assembly wholly disposed within said inner body member when said outer and inner body members are in an unlatched condition, said latch assembly including a radially moveable latch member and means biasing said latch member toward said latched condition; and(d) a source of pressurized fluid operably associated with said latch assembly and operable to bias said latch member toward said unlatched condition said outer body member defining a first fluid port adapted for communication with said source of pressurized fluid, said first fluid port being in relatively unrestricted fluid communication with said generally annular chamber.