Exhaust Gas Temperature (EGT), is the single most important factor to the long-term life of your internal combustion diesel engine.
If EGT values increase to dangerous levels then engine failure is imminent. That is why the ARMAX ECU utilizes a closed loop sensor feedback system to constantly monitor the vehicles exhaust gas temperature allowing for instant response.
When abnormally high EGT values are reported by the EGT sensor, mounted in the vehicles exhaust system, the ECU decreases the amount of fuel injected into the engine. This reduction allows the EGT to return to safe operating levels reducing load on the engine.
Once this has occurred the ECU will then gradually increase the amount of fuel injected, allowing the engine to return to full power in a controlled manor.
Adversely, if the EGT value is too cold (low engine temperatures), the ARMAX ECU progressively adds power as the operating temperature of the vehicle increases.
Another feature of the total EGT protection system is the ARMAX ECU carries out a number of plausibility checks, this system ensures the closed loop exhaust temperature feedback system is always precise in its reporting.
If a check falls outside the allowable tolerance the unit simply reduces the power level and protects the engine.
This feature is unique to the Safari ARMAX ECU providing total peace of mind.
The ARMAX ECU also calculates the engine cooling system temperature, this is important as a large percent of engine wear occurs when the engine is cold. Accordingly, the ARMAX ECU doesn't apply any additional power whilst the engine is cold i.e. on start up. As the engine warms up the ARMAX ECU progressively increases its influence, once full operating temperature is achieved the unit will perform to its full potential.