Fuel system control

A method of controlling an evaporative emissions control system associated with a fuel tank for a vehicle, the evaporative emissions control system including at least one vent valve configured to selectively open and close a vent, a fuel level sensor configured to sense a fuel level in the fuel tank, a pressure sensor configured to sense a pressure in the fuel tank, and an accelerometer configured to measure an acceleration of the vehicle, the method comprising:

• providing a cam driven tank venting control assembly having a rotary actuator that rotates a cam assembly based on operating conditions, the cam assembly having a first cam having a first cam profile configured to open and close a first vent valve of the at least one vent valve;
• determining if the vehicle is not moving based on a signal from the accelerometer sensor;
• determining if a fuel level in the fuel tank is increasing based on a first signal from the fuel level sensor;
• determining if a pressure in the fuel tank is increasing based on a signal from the pressure sensor;
• determining a refueling event is occurring if it is determined the fuel level is increasing, the pressure in the fuel tank is increasing, and the vehicle is not moving;
• and
• opening the at least one vent valve in response to determining the refueling event is occurring, wherein the opening comprises actuating the rotary actuator.

A method of controlling an evaporative emissions control system associated with a fuel tank for a vehicle, the evaporative emissions control system including at least one vent valve configured to selectively open and close a vent, a fuel level sensor configured to sense a fuel level in the fuel tank, a pressure sensor configured to sense a pressure in the fuel tank, and an accelerometer configured to measure an acceleration of the vehicle, the method comprising:

• providing a first vent valve configured to selectively open and close a first vent;
• providing a second vent valve configured to selectively open and close a second vent;
• determining if a fuel level in the fuel tank is increasing based on a first signal from the fuel level sensor;
• determine if a pressure in the fuel tank is increasing based on a second signal from the pressure sensor;
• determine if the vehicle is not moving based on a third signal from the accelerometer;
• determine a refueling event is occurring if the first signal indicates the fuel level is increasing, the second signal indicates pressure in the fuel tank is increasing, and the third signal indicates the vehicle is not moving;
• and
• opening at least one of the first and second vent valves based on determining the refueling event is occurring.