Exhaust valve throttling mechanism for two-stroke engine

Patent · Tue Aug 30 04:00:00 EDT 1988

OSTI ID:6629534

Riese, S B

This patent describes in a two-stroke engine, an engine block having in-line cylinders, piston means disposed for reciprocal movement in each cylinder, each cylinder including exhaust port means disposed to be closed by the piston means, the block including a passage intersecting each of the exhaust port means, and exhaust port throttling means including a shaft journalled for rotation within the passage, valve members disposed in spaced relation on the shaft, each valve member disposed in registry with one of the exhaust port means, each valve member being movable between a closed position where the valve member substantially closes off the respective exhaust port means and an open position, and operating means for rotating the shaft in accordance with a variation in engine speed to move the valve members from the closed position at low throttle speed to the open position at high throttle speed. The valve members when in the closed position at low speed act to restrict the propagation of pressure waves to the cylinders.

• Assignee: Brunswick Corp., Skokie, IL
• Patent Number(s): US 4766854
• OSTI ID: 6629534
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CONTROL EQUIPMENT
CYLINDERS
DESIGN
ENGINES
EQUIPMENT
EXHAUST SYSTEMS
FLOW REGULATORS
FLUID MECHANICS
HEAT ENGINES
HYDRAULICS
INTERNAL COMBUSTION ENGINES
MECHANICS
OPERATION
PISTONS
VALVES
VELOCITY