Abstract: A deactivating rocker arm can include an outer arm extending between a first end and a second end. The outer arm can have a first outer side arm and a second outer side arm. The first and second outer side arms can define outer pivot axle apertures and axle slots. The inner arm can be disposed between the first and second outer side arms. The inner arm can have a first inner side arm and a second inner side arm. The first and second inner side arms can define bearing apertures. A bearing can be mounted in the bearing apertures of the inner arm and the axle slots of the outer arm. The axle slots can be configured to permit lost motion movement of the bearing. A first biasing member can be disposed on the second end of the outer arm and in biasing contact with the bearing.

Abstract: A deactivating rocker arm can include an outer arm extending between a first end and a second end. The outer arm can have a first outer side arm and a second outer side arm. The first and second outer side arms can define outer pivot axle apertures and axle slots. The inner arm can be disposed between the first and second outer side arms. The inner arm can have a first inner side arm and a second inner side arm. The first and second inner side arms can define bearing apertures. A bearing can be mounted in the bearing apertures of the inner arm and the axle slots of the outer arm. The axle slots can be configured to permit lost motion movement of the bearing. A first biasing member can be disposed on the second end of the outer arm and in biasing contact with the bearing.

Abstract: A deactivating rocker arm can include an outer arm extending between a first end and a second end. The outer arm can have a first outer side arm and a second outer side arm. The first and second outer side arms can define outer pivot axle apertures and axle slots. The inner arm can be disposed between the first and second outer side arms. The inner arm can have a first inner side arm and a second inner side arm. The first and second inner side arms can define bearing apertures. A bearing can be mounted in the bearing apertures of the inner arm and the axle slots of the outer arm. The axle slots can be configured to permit lost motion movement of the bearing. A first biasing member can be disposed on the second end of the outer arm and in biasing contact with the bearing.

Abstract: A deactivating rocker arm can include an outer arm extending between a first end and a second end. The outer arm can have a first outer side arm and a second outer side arm. The first and second outer side arms can define outer pivot axle apertures and axle slots. The inner arm can be disposed between the first and second outer side arms. The inner arm can have a first inner side arm and a second inner side arm. The first and second inner side arms can define bearing apertures. A bearing can be mounted in the bearing apertures of the inner arm and the axle slots of the outer arm. The axle slots can be configured to permit lost motion movement of the bearing. A first biasing member can be disposed on the second end of the outer arm and in biasing contact with the bearing.

Abstract: A deactivating rocker arm can include an outer arm extending between a first end and a second end. The outer arm can have a first outer side arm and a second outer side arm. The first and second outer side arms can define outer pivot axle apertures and axle slots. The inner arm can be disposed between the first and second outer side arms. The inner arm can have a first inner side arm and a second inner side arm. The first and second inner side arms can define bearing apertures. A bearing can be mounted in the bearing apertures of the inner arm and the axle slots of the outer arm. The axle slots can be configured to permit lost motion movement of the bearing. A first biasing member can be disposed on the second end of the outer arm and in biasing contact with the bearing.

Abstract: A deactivating rocker arm can include an outer arm extending between a first end and a second end. The outer arm can have a first outer side arm and a second outer side arm. The first and second outer side arms can define outer pivot axle apertures and axle slots. The inner arm can be disposed between the first and second outer side arms. The inner arm can have a first inner side arm and a second inner side arm. The first and second inner side arms can define bearing apertures. A bearing can be mounted in the bearing apertures of the inner arm and the axle slots of the outer arm. The axle slots can be configured to permit lost motion movement of the bearing. A first biasing member can be disposed on the second end of the outer arm and in biasing contact with the bearing.

Abstract: A deactivating rocker arm for use with a cam having at least one no-lift safety lobe is provided. Safety lobe contacting surfaces on the rocker arm are configured for contact with safety lobes during abnormal operation of the rocker arm. When the rocker arm is deactivated, the safety lobe contacting surfaces may come into contact with safety lobes when excessive pump-up of a lash adjuster brings the rocker arm undesirably close to the rotating cam. This contact limits the range of motion of the rocker arm during certain instances of abnormal operation, promoting more effective transition between deactivated and activated states and preventing damaging contact between the rocker arm and the cam lobe.

Abstract: A deactivating rocker arm for use with a cam having at least one no-lift safety lobe is provided. Safety lobe contacting surfaces on the rocker arm are configured for contact with safety lobes during abnormal operation of the rocker arm. When the rocker arm is deactivated, the safety lobe contacting surfaces may come into contact with safety lobes when excessive pump-up of a lash adjuster brings the rocker arm undesirably close to the rotating cam. This contact limits the range of motion of the rocker arm during certain instances of abnormal operation, promoting more effective transition between deactivated and activated states and preventing damaging contact between the rocker arm and the cam lobe.

Abstract: A deactivating rocker arm for use with a cam having at least one no-lift safety lobe is provided. Safety lobe contacting surfaces on the rocker arm are configured for contact with safety lobes during abnormal operation of the rocker arm. When the rocker arm is deactivated, the safety lobe contacting surfaces may come into contact with safety lobes when excessive pump-up of a lash adjuster brings the rocker arm undesirably close to the rotating cam. This contact limits the range of motion of the rocker arm during certain instances of abnormal operation, promoting more effective transition between deactivated and activated states and preventing damaging contact between the rocker arm and the cam lobe.

Abstract: A deactivating rocker arm for use with a cam having at least one no-lift safety lobe is provided. Safety lobe contacting surfaces on the rocker arm are configured for contact with safety lobes during abnormal operation of the rocker arm. When the rocker arm is deactivated, the safety lobe contacting surfaces may come into contact with safety lobes when excessive pump-up of a lash adjuster brings the rocker arm undesirably close to the rotating cam. This contact limits the range of motion of the rocker arm during certain instances of abnormal operation, promoting more effective transition between deactivated and activated states and preventing damaging contact between the rocker arm and the cam lobe.

Abstract: A rocker arm assembly includes first and second rocker arms defining a pivot location. The first rocker arm includes, toward a first axial end thereof adjacent the pivot location, a fulcrum surface and, toward a second axial end thereof, a latch assembly including a latch member moveable between latched and unlatched conditions relative to a latch surface defined by an adjacent portion of the second rocker arm. The latch assembly further including a spring biasing the latch member toward one of the latched and unlatched conditions, and a pressure chamber operable to bias the latch member toward the other of the latched and unlatched conditions. The first rocker arm further includes a fluid passage having a first end in open fluid communication with the fulcrum surface and a second end in open fluid communication with the pressure chamber of the latch assembly.

Abstract: A tappet assembly includes a first follower engaging a cam lobe profile, and a second follower engaging an engine poppet valve. A latch member is operable to fix the first follower in an extended position, to provide a high lift condition. The first and second followers define first and second stop surfaces, respectively, such that when the latch member is retracted, the lift portion engages the first follower and moves it toward the poppet valve until the stop surfaces engage, and thereafter, further downward movement of the first follower moves the second follower to provide a low lift. One benefit of this feature is to prevent accumulation of unburned fuel in a port fuel injection type of gasoline engine.

Abstract: A valve control system including a camshaft having first and second cam profiles, the valve control system comprising a rocker arm assembly (11) including a first rocker arm (13) having a first cam follower (15) in engagement with the first cam profile, and a second rocker arm (17) having a second cam follower (23,25) in engagement with the second cam profile. The engine includes a fulcrum location (P) operable to provide a source of pressurized fluid, and the first rocker arm includes a latch member (47) moveable between latched (FIG. 6) and unlatched conditions. The latch member is biased toward the latched condition by a fluid pressure in a chamber (51), and the first rocker arm defines a fluid passage (55) having a first end (57) in open fluid communication with the pressure source, and a second end (59) in open fluid communication with the pressure chamber (51).

Abstract: A valve deactivation assembly (21) comprises part of the valve gear train for an internal combustion engine, and is disposed in a bore (55) defined by the A engine block (11B). The assembly (21) includes a latching mechanism (67) shiftable, in response to control fluid pressure, between latched and unlatched conditions. The assembly (21) includes an outer body member (53), having an outer cylindrical surface (53S), reciprocable within said the bore (55), the outer body member including a lower terminal portion (55L). The outer body member defines an annular sealing groove (75) which remains aligned within the bore (55), between the lower terminal portion (55L) and a passage (72) communicating control fluid pressure the latching mechanism (67), as the outer body member reciprocates. There is also a fluid passage (77) disposed to communicate a source (79) of low pressure to the annular groove (75), to thereby form a barrier to block the migration of air to the control pressure passage (72).

Abstract: A valve actuation sub-assembly for an internal combustion engine, the sub-assembly being adapted for attachment to an engine block (11B) and including a conventional roller follower (21) and a deactivating roller follower (47). The sub-assembly comprises a follower guide member (71) defining a first guide receptacle (81) for receiving an upper portion (87) of the conventional roller follower (21), and a second guide receptacle (83) for receiving an upper portion (93) of the deactivating roller follower (47). In accordance with the invention, neither upper portion (87,93) will be received within the guide receptacle (81,83) intended for the other upper portion, thus preventing assembly errors, wherein one roller follower type is installed in a location on the engine intended for the other roller follower type.

Abstract: A compression release engine brake assembly adapted for use with an internal combustion engine, and an exhaust valve (29) operable to open in a normal exhaust lift event (FIG. 9) and in a brake lift event (FIG. 15). The engine includes an exhaust valve actuating mechanism (23,31,37) for imparting reciprocal movement to said exhaust valve (29) in response to rotation of a cam shaft (11) including a cam profile (13), a normal lift portion (17) and a brake lift portion (19). The assembly includes a lost motion device (75) moveable between a normal lost motion condition (FIG. 4) and an actuated condition (FIG. 14) in response to movement of an input member (91). An energy storage spring (117) is operable, after being compressed to an energy storage condition (FIG. 12) to be able to bias the input member (91) toward a second position, effecting the actuated condition of the lost motion device (75).

Abstract: The invention is a valve deactivator assembly (15) for use in connection with a valve train of an internal combustion engine. In application, a pre-selected number of the engine cylinders would each be equipped with a deactivator connected to its intake engine valve. Upon driver selection or predetermined road conditions, sufficient lost motion would be introduced into the valve train so that the valve would remain closed and the cylinder deactivated as the engine is in operation. The deactivator has in its inner body (19) a latch assembly that is in a latched condition for normal operation of the valve train. When it is desired to retain the valve in the closed position and deactivate a cylinder, the latch assembly is caused to be moved to the unlatched condition by increase in the pressure of the engine oil. When the latch assembly is unlatched, significant lost motion is introduced into the valve train causing the valve to remain closed and the cylinder is deactivated.

Abstract: The invention is a valve deactivator assembly (15) for use in connection with a valve train of an internal combustion engine. In application, a pre-selected number of the engine cylinders would each be equipped with a deactivator connected to its intake engine valve. Upon driver selection or predetermined road conditions, sufficient lost motion would be introduced into the valve train so that the valve would remain closed and the cylinder deactivated as the engine is in operation. The deactivator has in its inner body (19) a latch assembly that is in a latched condition for normal operation of the valve train. When it is desired to retain the valve in the closed position and deactivate a cylinder, the latch assembly is caused to be moved to the unlatched condition by increase in the pressure of the engine oil. When the latch assembly is unlatched, significant lost motion is introduced into the valve train causing the valve to remain closed and the cylinder is deactivated.

Abstract: A valve deactivator assembly (49a) for an internal combustion engine of the type having valve means (29), drive means (13) for providing cyclical motion for opening and closing the valve means (29) in timed relationship to the events in a combustion chamber (30), and valve gear (21,23) operative in response to the cyclical motion to effect cyclical opening and closing of the valves (29). The valve deactivator assembly (49a) comprises part of the valve gear (21,23) and is disposed in series relationship between the drive means (13) and said valves (29). The valve deactivator assembly (49a) includes an outer body member (53) disposed for engagement with the drive means (13) and for cyclical motion therewith. There is an inner body member (61) disposed within the outer body member (53) and reciprocable relative thereto, the inner body member (61) having an upper end portion (93) disposed external to the outer body member (53) when the members (53,61) are in a latched condition.

Abstract: 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).