Exhaust gas temperature indicator for a gas turbine engine

An exhaust gas temperature indicator for detecting, storing and displaying an overtemperature event occurring during operation of a gas turbine engine, comprising:

• a temperature input for receiving a temperature signal from a sensor associated with the gas turbine engine;
• a control device coupled to said temperature input for comparing a sensed exhaust gas temperature represented by said temperature signal with a predetermined temperature limit, and for generating overtemperature data when said sensed temperature exceeds said predetermined temperature limit;
• a storage device coupled to said control device for storing said overtemperature data;
• a display device coupled to said control device and controlled by said control device in accordance with said overtemperature data stored by said storage device to display said stored overtemperature data;
• a first switch coupled to said control device, said first switch when actuated causing said display device to display said stored overtemperature data, and causing said control device to record an acknowledgement that the data has been displayed;
• and
• an indicator coupled to said control device for indicating a presence of unacknowledged overtemperature data in said storage device, said control device being operative to disable said indicator when no unacknowledged overtemperature event data remains in said storage device.

An exhaust gas temperature indicator for monitoring the peak temperature value occurring during operation of a gas turbine engine, comprising:

• a temperature input for receiving a temperature signal from a sensor associated with the gas turbine engine;
• a control device coupled to said temperature input;
• and
• a storage device coupled to said control device for storing a peak temperature value under the control of said control device;
• said control device being operative to compare a sensed exhaust gas temperature represented by said temperature signal with a predetermined minimum operating temperature, to monitor the peak temperature value represented by said temperature signal after said sensed exhaust gas temperature exceeds said predetermined minimum operating temperature, and to cause said storage device to store said peak temperature value.

An exhaust gas temperature indicator for displaying exhaust gas temperatures occurring during operation of a gas turbine engine, comprising:

• a temperature input for receiving a temperature signal from a sensor associated with the gas turbine engine;
• a control device coupled to said temperature input for monitoring a sensed exhaust gas temperature represented by said temperature signal, and for generating data to be stored when said sensed temperature meets a predetermined condition;
• a storage device coupled to said control device for storing said data;
• a switch coupled to said control device;
• a character display coupled to and controlled by said control device for displaying character information, said control device being operative to cause said character display to normally display a numerical indication of the current exhaust gas temperature represented by said temperature signal, and said control device being operative in response to actuation of said switch and to said data stored in said storage device to cause said character display to display character information derived from the data stored in said storage device;
• and
• an analog display coupled to said control device for providing a continuous analog display of the current exhaust gas temperature represented by said temperature signal.

An exhaust gas temperature indicator for providing indications of overtemperature conditions occurring during operation of a gas turbine engine, comprising:

• a temperature input for receiving a temperature signal from a sensor associated with the gas turbine engine;
• a control device coupled to said temperature input for monitoring a sensed exhaust gas temperature represented by said temperature signal, and for comparing said sensed temperature with a predetermined caution level temperature and a predetermined warning level temperature, respectively, said warning level temperature being higher than said caution level temperature;
• a display device coupled to and controlled by said control device for providing a quantitative indication of the current exhaust gas temperature represented by said temperature signal;
• an overtemperature caution indicator coupled to and controlled by said control device for indicating a current exhaust gas temperature in excess of said predetermined caution level temperature;
• and
• an overtemperature warning indicator coupled to and controlled by said control device for indicating a current exhaust gas temperature in excess of said predetermined warning level temperature.

A method for detecting, storing and displaying exhaust gas overtemperature events occurring during operation of a gas turbine engine, comprising the steps of:

• receiving a temperature signal from a sensor associated with the gas turbine engine;
• comparing a sensed exhaust gas temperature represented by said temperature signal with a predetermined temperature limit;
• generating data representing a discrete overtemperature event for each instance in which said sensed temperature exceeds said predetermined temperature limit;
• storing overtemperature event data relating to a plurality of discrete overtemperature events occurring at different times;
• recalling said overtemperature event data;
• and
• utilizing said recalled overtemperature event data to control a display of character information corresponding to each of said discrete overtemperature events;
• wherein the displayed character information relating to each of said discrete overtemperature events includes a numerical display of the peak temperature attained during said overtemperature event.

A method for detecting, storing and displaying exhaust gas overtemperature events occurring during operation of a gas turbine engine, comprising the steps of:

• receiving a temperature signal from a sensor associated with the gas turbine engine;
• comparing a sensed exhaust gas temperature represented by said temperature signal with a predetermined temperature limit;
• generating data representing a discrete overtemperature event for each instance in which said sensed temperature exceeds said predetermined temperature limit;
• storing overtemperature event data relating to a plurality of discrete overtemperature events occurring at different times;
• recalling said overtemperature event data;
• and
• utilizing said recalled overtemperature event data to control a display of character information corresponding to each of said discrete overtemperature events;
• wherein the displayed character information relating to each of said discrete overtemperature events includes a numerical display of the duration of said overtemperature event.

A method for detecting, storing and displaying exhaust gas overtemperature events occurring during the operation of a gas turbine engine, comprising the steps of:

• receiving a temperature signal from a sensor associated with a gas turbine engine;
• comparing a sensed exhaust gas temperature represented by said temperature signal with a predetermined temperature limit;
• generating data representing a discrete overtemperature event for each instance in which said sensed temperature exceeds said predetermined temperature limit;
• storing overtemperature event data relating to a plurality of discrete overtemperature events occurring at different times;
• recalling said overtemperature event data;
• and
• utilizing said recalled overtemperature event data to control a display of character information corresponding to each of said discrete overtemperature events;
• wherein the step of comparing said sensed temperature with a predetermined temperature limit comprises comparing said sensed temperature with a plurality of predetermined temperature limits corresponding to different temperature zones, and wherein the displayed character information relating to each of said discrete overtemperature events includes the temperature zone of said overtemperature event.

A method for detecting, storing and displaying exhaust gas overtemperature events occurring during operation of a gas turbine engine, comprising the steps of:

• receiving a temperature signal from a sensor associated with the gas turbine engine;
• comparing a sensed exhaust gas temperature represented by said temperature signal with a predetermined temperature limit;
• generating data representing a discrete overtemperature event for each instance in which said sensed temperature exceeds said predetermined temperature limit;
• storing overtemperature event data relating to a plurality of discrete overtemperature events occurring at different times;
• recalling said overtemperature event data;
• utilizing said recalled overtemperature event data to control a display of character information corresponding to each of said discrete overtemperature events;
• and
• recording an acknowledgement of the overtemperature event information for which the corresponding character information has been displayed by said character display.

A method for detecting, storing and displaying exhaust gas overtemperature events occurring during operation of a gas turbine engine, comprising the steps of:

• receiving a temperature signal from a sensor associated with the gas turbine engine;
• comparing a sensed exhaust gas temperature represented by said temperature signal with a predetermined temperature limit;
• generating data representing a discrete overtemperature event for each instance in which said sensed temperature exceeds said predetermined temperature limit;
• storing overtemperature event data relating to a plurality of discrete overtemperature events occurring at different times;
• recalling said overtemperature event data;
• and
• utilizing said recalled overtemperature event data to control a display of character information corresponding to each of said discrete overtemperature events;
• wherein the step of displaying said character information comprises the steps of:
• during a first time interval, displaying a first overtemperature parameter relating to a discrete overtemperature event;
• and
• during a second time interval, displaying a second overtemperature parameter relating to the same discrete overtemperature event.

A method for generating, storing and displaying exhaust gas temperature data during operation of a gas turbine engine, comprising the steps of:

• receiving a temperature signal from a sensor associated with the gas turbine engine;
• comparing a sensed exhaust gas temperature represented by said temperature signal with a predetermined temperature limit;
• generating overtemperature data when said sensed temperature exceeds said predetermined temperature limit;
• storing said overtemperature data;
• producing an indication signifying that said overtemperature data has been stored;
• receiving a display command;
• in response to said display command, recalling said overtemperature data and utilizing said recalled overtemperature data to control a display of said data;
• and
• disabling said indication upon recall and display of said overtemperature data.

A method for monitoring the peak exhaust gas temperature value occurring during operation of a gas turbine engine, comprising the steps of:

• receiving a temperature signal from a sensor associated with the gas turbine engine;
• comparing a sensed exhaust gas temperature represented by said temperature signal with a predetermined minimum operating temperature;
• in response to said comparison step indicating that said sensed exhaust gas temperature exceeds said predetermined minimum operating temperature, monitoring the peak temperature value represented by said temperature signal;
• and
• storing said peak temperature value.

A method for generating, storing and displaying exhaust gas temperature data during operation of a gas turbine engine, comprising the steps of:

• receiving a temperature signal from a sensor associated with the gas turbine engine;
• providing a first display of the current exhaust gas temperature represented by said temperature signal;
• generating data to be stored when said sensed temperature meets a predetermined condition;
• storing said data;
• receiving a display command;
• recalling said stored data in response to said display command;
• utilizing said recalled data to provide a second display of said recalled data concurrently with said first display of the current exhaust gas temperature.

A method for providing indications of exhaust gas overtemperature conditions occurring during operation of a gas turbine engine, comprising the steps of:

• receiving a temperature signal from a sensor associated with the gas turbine engine;
• comparing a sensed exhaust gas temperature represented by said temperature signal with a predetermined caution level temperature and a predetermined warning level temperature, respectively, said warning level temperature being higher than said caution level temperature;
• providing a first indication in response to said comparison step indicating that the sensed exhaust gas temperature exceeds said predetermined caution level temperature;
• and
• providing a second indication in response to said comparison step indicating that the sensed exhaust gas temperature exceeds said predetermined warning level temperature.