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US 2022/0205373 A1Published application
Exhaust valve opening system
AssigneeCummins Inc.
InventorDixon Malcolm Correa
Life of this patent
Estimating the term…
Abstract
An exhaust valve opening apparatus such as for an engine compression braking system includes a rocker shaft for supplying control fluid to an controllable valve and for distributing the control fluid to a primary and second piston arrangement that selectively opens an exhaust valve in response to the control fluid being pressurized.
Claims27
An exhaust valve opening apparatus, comprising:
- an elongated rocker shaft including at least one longitudinally extending flow path connectable to a control fluid supply and to a controllable valve that is operable to pressurize the control fluid supplied by said rocker shaft to open at least one exhaust valve.
An exhaust valve opening apparatus, comprising:
- a rocker shaft in fluid communication with a control fluid supply;
- and
- a housing assembly including a housing around said rocker shaft, a controllable valve in fluid communication with said rocker shaft to receive control fluid from said rocker shaft, a check valve in fluid communication with said controllable valve to receive pressurized control fluid from said controllable valve, and primary and secondary pistons in fluid communication with said check valve to receive pressurized control fluid from said check valve, wherein motion imparted to said primary piston by a cam lobe is transferred to said secondary piston to displace an exhaust valve.
An exhaust valve opening apparatus, comprising:
- a rocker shaft in fluid communication with a control fluid supply;
- a first housing assembly including a first housing around said rocker shaft, a controllable valve in fluid communication with said rocker shaft to receive control fluid from said rocker shaft, a first check valve in fluid communication with said controllable valve to receive pressurized control fluid from said controllable valve, and first primary and secondary pistons in fluid communication with said first check valve to receive pressurized control fluid from said check valve, wherein motion imparted to said first primary piston by a first cam is transferred to said first secondary piston to displace a first exhaust valve;
- and
- a second housing assembly including a second housing around said rocker shaft that is spaced from said first housing along said rocker shaft, a second check valve in fluid communication with said controllable valve to receive pressurized control fluid from said controllable valve through said rocker shaft, and second primary and secondary pistons in fluid communication with said second check valve to receive pressurized control fluid from said second check valve, wherein motion imparted to said second primary piston by a second cam is transferred to said second secondary piston to displace a second exhaust valve.
1 more element
An exhaust valve opening apparatus, comprising:
- a housing assembly including a housing positionable around a rocker shaft, a controllable valve supported on said housing, a check valve supported on said housing, a primary piston supported on said housing, and a secondary piston supported on said housing, a first flow path defined by said housing that connects an outlet of said controllable valve to an inlet of said check valve and a second flow path defined by said housing that connects an outlet of said check valve to said primary and secondary pistons.
Dependencies are inferred from the claim text.