Patent ID: 6039012
Filing Date: 2000-03-21
Classification: F02B,F02D,F05C,Y02T

Abstract:
A two-cycle, crankcase compression, internal combustion engine comprised of a cylinder block defining a cylinder bore, a cylinder head fixed at one end of said cylinder block enclosing one end of said cylinder bore, a crankcase member fixed at the other end of said cylinder block and closing the other end of said cylinder bore and forming a crankcase chamber therewith, a piston reciprocating in said cylinder bore, a crankshaft rotatably journaled in said crankcase chamber and driven by said piston, said piston, said cylinder bore, and said cylinder head forming a combustion chamber, at least one scavenge port formed in a wall of said cylinder bore for transferring an air charge compressed in said crankcase chamber to said combustion chamber, reciprocating motion of said piston opening and closing said scavenge port, an exhaust port in said cylinder bore opened and closed by the reciprocation of said piston and for discharging exhaust gases from said combustion chamber, a fuel injector for injecting fuel directly into said combustion chamber, an exhaust system for discharging exhaust gases from said exhaust port to the atmosphere, an exhaust control valve for controlling the effective cross-sectional area of said exhaust system, a starter for starting said engine, means for sensing at least one running condition of said engine, control means for operating said exhaust control valve for controlling the effective cross-sectional area of said exhaust system in response to said one sensed engine running condition, means for sensing the starting of said engine by said starter, and means for modifying the effective position of said exhaust control valve in the event of the sensing of said starting of said engine.