Low noise valve train

Details Low noise valve train Low noise valve train

F - Mech Eng,Light,Heat,Weapons

01

L

123/192

F01L 1/04 (2006.01) F01L 1/18 (2006.01)

Patent

CA 1309624

LOW NOISE VALVE TRAIN Abstract of the Disclosure A low noise valve train for actuating poppet valves in an internal combustion engines includes a camshaft cam profile including a preopening bluff ramp to compress the valve train prior to opening each valve with its opening ramp and a post closing bluff ramp to quickly release compression of the valve train after closing of each valve with its closing ramp together with opening and closing ramps yielding low velocity opening and closing of the valves. The result is a combination of valve train pre and post compression to obtain low opening and closing velocities for the valves while avoiding extended operation with the valve train compressed by the action of the associated bluff ramps.

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