Exhaust port control valve for two stroke engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorTatsuyuki Masuda
Life of this patent
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Abstract
A two cycle crankcase compression diesel engine having a supplemental exhaust port system that is formed in a straight line perpendicular to the cylinder bores and which intersects the main exhaust ports. An exhaust control valve arrangement is provided for controlling the flow through the supplemental exhaust ports to reduce the compression ratio under high load, high speed running conditions. The supplemental exhaust control valves comprise a plurality of individual valves each contained within a common bore extending through the cylinder and interconnected by connecting members that permit axial and circumferential misalignment so as to accommodate for distortion and avoid sticking of the valves.
Claims8
An exhaust control valve arrangement for an internal combustion engine having a cylinder block having a plurality of in line cylinder bores each receiving a respective piston, an exhaust port extending through said cylinder block from each of said cylinder bores for delivering exhaust gases to the atmosphere, a bore extending through said cylinder block adjacent said cylinder bores and intercepting each of said exhaust ports, a plurality of rotatable valve members received in said bore for controlling the flow through respective of said exhaust ports, and tongue and groove means for coupling said valve members for simultaneous rotation while permitting relative and free axial movement of said valve members for accommodating distortion in said cylinder block.
Dependencies are inferred from the claim text.