Vehicle calibration using data collected during normal operating conditions

A calibration system for a vehicle, the vehicle including an engine control module that stores a calibration table defining a plurality of fuel-injector settings each corresponding to a combination of a range of engine speeds and a range of values indicative of throttle position, and operates the vehicle in an closed-loop mode that adjusts the fuel-injector setting from the calibration table based on an air-to-fuel ratio detected by a sensor, the calibration system comprising:

• a vehicle communication interface module that is selectively connectable to the engine control module, the vehicle communication interface module including
• a housing that is selectively attachable to the vehicle and that, when attached to the vehicle, is supported by the vehicle without restricting normal operation of the vehicle, and
• a first computer-readable memory that stores the data received from the engine control module including a plurality of adjusted fuel-injector settings and a corresponding combination of engine speed and a value indicative of throttle position for each of the plurality of adjusted fuel-injector settings;
• and
• a calibration computer system that is selectively connectable to the engine control module and the vehicle communication interface module, the calibration computer system including
• a processor, and
• a second computer-readable memory storing instructions that, when executed by the processor, cause the calibration computer system to
• receive data stored on the first computer-readable memory of the vehicle communication interface module,
• determine a number of adjusted fuel-injector settings stored on the first computer-readable memory corresponding to a first combination of engine speed and the value indicative of throttle position,
• when the number of adjusted fuel-injector settings corresponding to the first combination is greater than a threshold, generate an updated calibration table entry based on the adjusted fuel-injector settings corresponding to the first combination, and
• transmit an updated calibration table, including the updated calibration table entry, to the engine control module when the engine control module is connected to the calibration computer system.