System and method for measuring quality of fuel

A method for determining quality of fuel in an engine, the method comprising:

• determining, by a controller, whether the engine is running in a steady state condition based on one or more engine operating parameters;
• identifying, by the controller, a measurement window based on a pressure of the fuel at an inlet to a fuel quality measuring unit disposed between a fuel admission valve and an intake manifold of the engine, an Intake Manifold Pressure (IMP), and determining whether the engine is running in the steady state condition, wherein the measurement window is indicative of a time duration when a value of at least one calibration parameter is within a predefined range of calibration points for the at least one calibration parameter;
• controlling, by the controller, an opening and a closing of a first valve, a second valve, and a fuel metering valve of the engine during the measurement window, based on a predefined control map, the opening and the closing being controlled to capture the fuel between the first valve and the second valve, wherein the first valve is fluidly coupled to the fuel admission valve and the second valve is fluidly coupled to the intake manifold;
• and
• determining, by the controller, the quality of fuel captured between the first valve and the second valve based on one or more values detected by a quality measurement sensor of the fuel quality measuring unit disposed between the first valve and the second valve.

A system for measuring quality of fuel in an engine, the system comprising:

• a fuel quality measuring unit disposed between a fuel admission valve and an intake manifold of the engine, the fuel quality measuring unit comprising a first valve fluidly coupled to the fuel admission valve, a second valve fluidly coupled to the intake manifold, and a quality measurement sensor disposed between the first valve and the second valve;
• and
• a controller in communication with the fuel quality measuring unit, the controller being configured to:
• receive an input being indicative of an attempt to quick-start the engine;
• open the first valve and the second valve for receiving the fuel from the fuel admission valve based on the input for quick-starting of the engine;
• close the first valve and the second valve, once the engine is quick-started, for capturing the fuel between the first valve and the second valve;
• and
• determine the quality of the fuel captured between the first valve and the second valve based on one or more values detected by the quality measurement sensor.