Patent ID: 7258107
Filing Date: 2007-08-21
Classification: F02B,F02D,Y02T

Abstract:
1. A two-cycle engine comprising a throttle; a cylinder having an exhaust port and an intake port, the intake port in fluid communication with the throttle; a fuel injector in fluid communication with the cylinder; a temperature sensor coupled to the exhaust port of the cylinder to measure exhaust gases; a piston slidably mounted in the cylinder; a rotatable crankshaft for outputting motion of the piston; a piston rod connecting the piston to the crankshaft; and a control unit electrically coupled to the fuel injector and the temperature sensor, the control unit operable during normal operating conditions and during low temperature operating conditions to identify a temperature range among a plurality of temperature ranges that corresponds to the output from the temperature sensor, the control unit further configured to activate the fuel injector to deliver a fuel charge to the cylinder and to activate the fuel injector based on an injection size map corresponding to the identified temperature range in which a size of the fuel charge varies with operating speed of the piston and throttle position.