On-vehicle water in fuel sensing system and related signal processing

A water in fuel sensing system comprising:

• a light source;
• a first light detector;
• a second light detector;
• and
• a sensor controller;
• wherein the sensor controller is in signal communication with the first light detector and the second light detector;
• wherein the sensor controller is configured to
• evaluate signals received from the first light detector and the second light detector, the signals comprising an absorbance peak;
• distinguish between air bubbles and water droplets based on a peak width of the absorbance peak received from the first light detector;
• record information regarding the water droplets;
• and
• generate an estimate of an amount of water in a fuel.

A water in fuel sensing system comprising:

• a first light source, wherein the first light source is configured to emit near-infrared light;
• a second light source, wherein the second light source is configured to emit light within the visible spectrum;
• a first light detector, wherein the first light detector is configured to detect light emitted from the first light source after it has passed through a fuel;
• a second light detector, wherein the second light detector is configured to detect light emitted from the second light source after it has passed through the fuel;
• and
• a sensor controller;
• wherein the sensor controller is in signal communication with the first light detector and the second light detector;
• wherein the sensor controller is configured to
• evaluate signals received from the first light detector and the second light detector, the signals comprising an absorbance peak;
• distinguish between air bubbles and water droplets based on a peak width of the absorbance peak received from the first light detector;
• record information regarding the water droplets;
• and
• generate an estimate of an amount of water in a fuel.