Multipositional lift rocker arm assembly
AssigneeFord Global Technologies, LLC
InventorsGordon William St John Sweetnam, Matthew Byrne Diggs
Life of this patent
Estimating the term…
Abstract
A multiple lift position rocker arm 307 is provided which includes a body 10 and a pivotally mounted lost motion arm 44. A latch 120 is connected on one end of the body to prevent pivotal movement of the arm 344 with respect to the body 10 in a first given angular direction. The latch 120 has a second position to allow the arm 344 to pivot relative to the body to activate a valve stem 18 in a second state of activation. Preferably a roller 356 is connected with the arm 344 and rollers 162 are connected with the body 10. Roller 356 makes contact with a cam lobe in the first state of activation of the rocker arm assembly 307. The rollers 162 make contact with a cam lobe when the rocker arm assembly is in a second state of activation.
Claims22
A multiple lift position engine rocker arm assembly comprising:
- a body engagable adjacent a first end with a valve stem, said body being engagable with a fulcrum adjacent an end opposite said first end;
- an arm pivotally connected to one of said ends of said body, said arm being spring biased into engagement with a cam lobe, said arm having an aperture therein;
- a latch connected on an end of said body generally opposite said arm pivotal connection to prevent angular movement of said arm with respect to said body in a first given angular direction to transmit movement of said arm by said cam to said body for a first state of activation of said valve stem, and said latch having a second position to allow said arm to pivot relative to said body to activate said valve stem in a second state of activation;
- a shaft connected with said body and extending into said arm aperture providing an angular stop for said arm;
- and
- a roller rotatably connected to said body for contacting a cam lobe in said second state of activation.
A multiple lift position engine rocker arm assembly comprising:
- a fork-shaped body engagable adjacent a first end with a valve stem, said body being engagable with a fulcrum adjacent an end opposite said first end;
- an arm pivotally connected to one of said ends of said body, said arm being spring-biased into engagement with a cam lobe, said arm having a roller rotatably connected thereto;
- a latch connected on the end of said body, generally opposite said arm pivotal connection with said body, said latch having a first position to prevent angular movement of said arm with respect to said body in a first given angular direction to transmit movement of said arm by said cam lobe to said body for a first state of activation of said valve stem, and said latch having a second position to allow said arm to pivot relative to said body to activate said valve stem in a second state of activation;
- and second and third rollers connected with said body and connected on coterminous shafts for contacting a cam lobe in said second state of activation, said second and third rollers being separated by said first roller.
A multiple lift position engine rocker arm assembly comprising:
- a body having forked lobes and being engagable adjacent a first end with a valve stem, said body being engagable with a fulcrum adjacent an end opposite said first end;
- a forked arm pivotally connected to one of said ends of said body between said lobes of said body, said arm being spring-biased into engagement with a cam lobe, said arm having aligned apertures through said lobes of said arm;
- a sleeve fitted within said aperture of said arm;
- a roller rotatably mounted on said sleeve between said lobes of said arm for providing rolling engagement with said cam lobe said arm has engagement with;
- a latch connected on an end of said body generally opposite said arm pivotal connection to prevent angular movement of said arm with respect to said body in a first given angular direction to transmit movement of said arm by said cam to said body for a first state of activation of said valve stem, and said latch having a second position to allow said arm to pivot relative to said body to actuate said valve stem in a second state of activation;
- a shaft connected with said lobes and extending into said arm aperture providing an angular stop for said arm;
- and
- rollers rotatably connected on said body for contacting a cam lobe in said second state of activation, said rollers being outboard of said body.
Dependencies are inferred from the claim text.