The ULPower engine designers have given a lot of thought to the question of where and if, to build in redundancy. In general, it is either impossible or impractical to duplicate the functions of most of a piston engine's mechanical or electric components. Since reliability carries such importance in aircraft engines, components which are specifically designed for the engine are given large factors of safety whenever possible to reduce the risk of failure to the minimum.
UL Power engines have incorporated dual spark plugs on each cylinderhead.
As the ULPower engine uses a multipoint fuel injection system, we could argue that fuel injection has some form of redundancy. Each injector provides fuel to one cylinder. So if, for any reason a fuel injector would fail, the engine would continue to run on the remaining three cylinders. Although the engine would have a significant power loss, the aircraft will still be able to continue flying while in search of an airport for a precautionary landing.
Standard engines are equipped with a single ECU. For mission critical applications or by personal choice you can run the ULPower Aero Engine with TWO ECUs – at the same time. This is called the dual ECU option and offers ‘ECU redundancy’.
On a dual ECU installation, there are two of each sensor and two physically separeated ECUs. (you can choose to install one on the FWF side and one in the cockpit)
The two ECUs are both “on” but work in ‘Active Standby’. The advantage of the active standby system is that one ECU automatically takes over the entire engine management in the highly unlikely event of the other ECU failing