SYSTEMS AND METHODS FOR ELECTRONICALLY CONTROLLING FUEL-TO-AIR RATIO FOR AN INTERNAL COMBUSTION ENGINE

摘要

Systems and methods for electronically controlling the fuel-to-air ratio of a fuel mixture supplied to an internal combustion engines are disclosed. In one aspect, electronic control systems and methods are provided that determine and automatically move a choke valve in accordance with a first ramp having a first characteristic that is dependent on engine temperature and ambient air temperature. In another aspect, an integrated ignition and electronic auto-choke module is provided. In yet another aspect, electronic control systems and methods are provided that dynamically control a movement characteristic of a choke valve using a feedback loop.

主权项

1. A method of controlling a choke valve of an internal combustion engine using an electronic system comprising, in operable cooperation, a controller, a first temperature sensor configured to measure a first temperature indicative of engine temperature, a second temperature sensor configured to measure a second temperature indicative of ambient air temperature, and an actuator configured to move the choke valve, the method comprising:
a) determining, with the controller, a starting position for the choke valve that is dependent on the first temperature; b) performing a first choke opening stage that comprises moving, with the actuator, the choke valve from an initial position to the starting position; c) determining, with the controller, a first ramp for opening the choke valve, wherein a first characteristic of the first ramp is dependent on the first and second temperatures; and d) subsequent to completion of the first choke opening stage, performing a second choke opening stage that comprises moving, with the actuator, the choke valve toward a fully-open position in accordance with the first ramp.