In a successful engine start, what happens to the Exhaust Gas Temperature (EGT)?

During a successful engine start, the Exhaust Gas Temperature (EGT) rises due to the initial combustion of fuel and the subsequent increase in engine power. When the engine ignites, fuel is injected into the combustion chamber, where it mixes with air and ignites. This process generates a significant amount of heat, which is reflected in the EGT.

As the engine starts and reaches operational speeds, the combustion process stabilizes, leading to a consistent rise in temperature. This increase in EGT is also an important parameter for monitoring engine performance and health. An abnormal rise or drop in EGT during startup can indicate a problem, such as improper fuel-air mixture, engine malfunction, or issues with the ignition system.

Understanding the behavior of EGT during start-up is crucial for operators and technicians, as it not only indicates successful ignition but also helps ensure that the engine operates within safe temperature limits during the entire start-up phase.