ULPOWER UL350 Operating Manual

Also see for UL260: Operating manual

ULPOWER UL350 Operating Manual Manual pdf 10 page image

Operating Manual ULPOWER UL260,UL350,UL390,UL520M0310: OM 260 - 520A01 Revision No: 00 Date: 2019-04-01 Page: 8 of 22Description of systemsLubricant systemThe high volume oil pump, with integrated pressure release valve, takes up oil through a coarsefilter on the oil pick up tube which is located in the wet oil sump.An impressive amount of pressurized oil is pumped through the oil cooler (optional) and oil filterbefore it enters the main oil gallery where it lubricates the essential parts of the engine. Excessiveoil accumulates back into the sump.Fuel systemFuel from the tanks is guided through a coarse filter before reaching the electrical fuel pump. Thishigh volume fuel pump (120l/h) creates a pressurized fuel flow and pumps fuel through a fuel finefilter towards the injectors and the integrated fuel pressure regulator. Afterwards excessive fuel isreturned to the fuel tank.Electronic Engine Management systemAll ULPower engines are equipped with an electronic injection and ignition system.The ECU controls the mixture and timing from start-up to shut-down. As a result, in the cockpit,there is no choke, no primer, no carb heat, and no mixture; just a single lever – the throttle;The ECU automatically sets the fuel mixture and ignition timing (multiple times per second!). It willeven fine tune the fuel flow to compensate for changes in barometric pressure as well as inlet airtemperature in the inlet manifold/airbox.With timing corrections to avoid detonation and a built-in rev-limiter (3,300rpm on most engines)the ECU not only ensures the most efficient power to fuel consumption at any given operatingcondition, but it also brings extra safety.Note: Since the engine is managed electronically and a current is needed to generate the sparksand operate the fuel pump, the engine cannot run without a working electrical system.The UL 260 / UL350 engine and fuel pump use maximum 15 Amps (12V DC) to operateThe UL 390 / UL520 engine and fuel pump use maximum 21 Amps (12V DC) to operateNote: The UL260/UL350 engine comes with an integrated AC generator with externalrectifier/regulator that can supply up to 30 Amps. The UL390/UL520 generator can supplyup to 50 amps This should be sufficient to charge the battery while the engine is operatingand other electrical aircraft systems are in use.Cooling systemAll engines are air and oil cooled. Installing the ram air ducts that come with the engine, ismandatory. See installation manual for more info on this subjectThe installation of an oil cooler is mandatory as the oil is not only used to lubricate but also to coolthe engine. See installation manual for more info on this subject.