Patent ID: 6892700

Claim:
A marine engine control system for controlling both warm and cold starting and running conditions by simultaneously varying the ignition timing, fuel injection, and idle speed control valve, said control system comprising: an engine temperature sensor; an engine speed sensor; a fuel injector; an ignition system; an idle speed control; a programmed electronic control unit responsively coupled to said engine temperature sensor, said engine speed sensor operatively coupled to said fuel injector, said ignition system, and said idle speed control valve, said electronic control unit automatically providing a warm-start mode and a cold-start mode, said cold-start mode automatically controlling said fuel injectors to reduce the flow of fuel after starting along a first predetermined curve with time, and said warm-start mode automatically controlling said fuel injectors after starting along a second predetermined curve with time, said second curve having a greater rate of change after starting than said first curve, said cold-start mode automatically controlling said ignition system according to a predetermined ignition curve, said idle speed control valve being automatically controlled by maintaining the idle speed of said engine at a predetermined value.