초록

An internal combustion piston engine having a plurality of intake valves and a plurality of exhaust valves per cylinder employs apparatus for disabling the operation of at least one exhaust valve upon decrease in speed of the engine below a predetermined level.

대표청구항 ▼

An internal combustion engine having a cylinder and a piston slidable in the cylinder, comprising at least one intake passage in communication with the cylinder, each said intake passage having an intake valve for controlling communication with the cylinder; a plurality of exhaust passages in commun

An internal combustion engine having a cylinder and a piston slidable in the cylinder, comprising at least one intake passage in communication with the cylinder, each said intake passage having an intake valve for controlling communication with the cylinder; a plurality of exhaust passages in communication with the cylinder, each said exhaust passage having an exhaust valve for controlling communication with the cylinder; and means for opening and closing said intake and exhaust valves, said means including disabling means for maintaining less than all said exhaust valves in a closed position through a complete exhaust cycle in response to an operating condition of the engine.