Systems and methods for controlling a dosing module

An exhaust aftertreatment system comprising:

• a pressure sensor comprising:
• a sensing element configured to provide a pressure voltage based on a pressure of treatment fluid in a downstream dosing module,
• a first signal conditioner electrically coupled to the sensing element and configured to receive the pressure voltage from the sensing element and output a pressure signal, and
• a second signal conditioner electrically coupled to the sensing element and configured to receive the pressure voltage from the sensing element, determine a trim calibration value based on a trim calibration function and the pressure voltage, and output a trimmed pressure signal, wherein the trimmed pressure signal is determined based on the pressure voltage and the trim calibration value;
• and
• a controller electrically coupled to the pressure sensor, the controller configured to:
• receive the pressure signal and the trimmed pressure signal from the pressure sensor,
• determine a pressure measurement based on the pressure signal,
• determine a first injection amount based on the pressure measurement,
• cause an upstream injector of an upstream dosing module to inject the treatment fluid according to the first injection amount,
• determine a trimmed pressure measurement based on the trimmed pressure signal,
• determine a second injection amount based on the trimmed pressure measurement, and
• cause a downstream injector of the downstream dosing module to inject the treatment fluid according to the second injection amount.

A controller for an exhaust aftertreatment system, the controller configured to:

• receive a pressure signal from a pressure sensor, the pressure sensor configured to provide the pressure signal based on a pressure voltage that is based on a pressure of treatment fluid in a downstream dosing module;
• determine a pressure measurement based on the pressure signal;
• determine a first injection amount based on the pressure measurement;
• cause an upstream injector of an upstream dosing module to inject the treatment fluid according to the first injection amount,
• receive the pressure voltage from the pressure sensor;
• determine a trim calibration value based on a trim calibration function and the pressure voltage;
• determine a second injection amount based on the pressure measurement and the trim calibration value;
• and
• cause a downstream injector of the downstream dosing module to inject the treatment fluid according to the second injection amount.