Patent ID: 6189494
Filing Date: 2001-02-20
Classification: F02D,Y02T

Abstract:
An exhaust timing control apparatus for a two-cycle engine having a piston, a cylinder, a cylinder block, an exhaust port, comprising:a valve accommodating section obliquely provided in said cylinder block;a control valve inserted into said valve accommodating section and slidably moving forward and backward along a sliding surface having a cavity therein for changing an exhaust timing of said engine;a resonance chamber provided in the vicinity of said valve accommodating section;a valve drive unit mounted on said cylinder block for driving said control valve in the forward and backward direction; anda pressure passage provided in said cylinder block for introducing a combustion pressure in said cylinder into said valve drive unit;wherein said cavity communicates between said exhaust port and said resonance chamber when said control valve moves forward, and said valve drive unit drives said control valve based on said combustion pressure.