System and program product for controlling exhaust gas temperature of engine system

A program product stored on a computer readable storage medium, the program product operative to control an operational temperature of an exhaust gas yielded from an engine system to a turbocharger system when executed, the exhaust gas being output from the engine in an exhaust line which is received at an input of a turbine component of the turbocharger system, the computer readable storage medium comprising program code for:

• reading the temperature of the exhaust gas from a temperature sensor positioned within the turbocharger system;
• determining if the measured first temperature of the exhaust gas is less than a minimum temperature value or greater than a maximum temperature value, the minimum temperature value and maximum temperature values defining a temperature safety window of the system;
• calculating an engine speed of an engine of the engine system;
• if the measured first temperature of the exhaust gas is determined to be less than the minimum temperature value of the temperature safety window or greater than the maximum temperature value of the temperature safety window, adjusting a first speed setpoint of the engine by the calculated engine speed to produce a second speed setpoint of the engine;
• changing the operational speed of the engine by based on the second speed setpoint of the engine that results in the operational temperature of the exhaust gas in the exhaust line being altered so that when a second temperature of the exhaust gas is measured by the sensor at a later time period of operation of the system after the step of changing the operational speed, the measured second temperature of the exhaust gas is determined to be less than the maximum temperature value of the temperature safety window and greater than the minimum temperature value of the temperature safety window such that the operational temperature of the exhaust gas is controlled.

A system comprising:

• an engine system;
• a turbocharger system in fluid communication with the engine system, the turbocharger system including:
• a turbine component configured to receive an exhaust gas from the engine system, the exhaust gas being output from the engine system in an exhaust line which is received at an input of the turbine component;
• a rotatable shaft coupled to the turbine component;
• a compressor component coupled to the rotatable shaft, wherein the compressor component is configured to deliver a compressed air stream to the engine system;
• a controller configured to adjust an engine system speed based on the temperature of the exhaust gas being outside of a temperature safety window;
• and
• a sensor disposed in the exhaust line being in communication with the controller, the sensor being configured to measure a first temperature and a second temperature of the exhaust gas disposed in the exhaust line;
• the system operating according to the following method:
• measuring the first temperature of the exhaust gas by the sensor,
• determining via the controller if the measured first temperature of the exhaust gas is less than a minimum temperature value or greater than a maximum temperature value, the minimum temperature value and maximum temperature values defining a temperature safety window of the system;
• calculating an engine speed of the engine system via the controller;
• if the measured first temperature of the exhaust gas is determined to be less than the minimum temperature value of the temperature safety window or greater than the maximum temperature value of the temperature safety window, adjusting a first speed setpoint of the engine system by the calculated engine speed via the controller to produce a second speed setpoint of the engine system;
• changing the operational speed of the engine system by the controller based on the second speed setpoint of the engine system that results in the operational temperature of the exhaust gas in the exhaust line being altered so that when a second temperature of the exhaust gas is measured by the sensor at a later time period of operation of the system after the step of changing the operational speed, the measured second temperature of the exhaust gas is determined by the controller to be less than the maximum temperature value of the temperature safety window and greater than the minimum temperature value of the temperature safety window such that the operational temperature of the exhaust gas is controlled.