MODERNIZACIJA MOTORA V – 46TK UGRADNJOM SUVREMENOG SUSTAVA UBRIZGAVANJA

Tenk M84A je najvažnije oklopno sredstvo u OSRH. Ovaj tenk koristi 12-cilindarski Diesel motor V-46-TK koji razvija snagu od 735 kW. Jedan od načina povećanja pokretljivosti je povećanje snage motora. Danas je uobičajeno da tenkovski motori imaju snago od 1100 kW. Pri toj snazi motora, tenk M84A bi imao specifičnu snagu od 26,2 kW/t što je bolje od najsuvremenijeg tenka današnjice, ruske Armate (22,8 kW/t). Povećanje snage motora se najčešće ostvaruje povećanjem gustoće energije koja ulazi u moto, konkretnije povećanjem mase zraka (sustav prednabijanja većeg kapaciteta) i povećanja mase goriva. Kako bi se osiguralo i učinkovito izgaranje što ujedno znači i manja potrošnja goriva te veća autonomija vozila, potrebno je imati sustav ubrizgavanja koji može ostvariti velike tlakove ubrizgavanja, samim time i dobro miješanje goriva sa zrakom. Suvremeni sustavi koji omogućuju precizno upravljanje količinom brizganog goriva i tlakom ubrizgavanja su Common Rail sustavi. Motor V-46-TK ima izravni sustav ubrizgavanja koji je moguće zamijeniti modernijim Common Rail sustavom što bi podiglo snagu motora na 1100 kW, smanjilo buku te zagađenje okoliša. Najvažnije komponente sustava ubrizgavanja su: visokotlačna pumpa, brizgaljke, cjevovodi itd. Kako bi modernizacija bila uspješna nužno je navedene dijelove adekvatno zamijeniti. Jednostavnim analitičkim proračunom se može doći do potrebnih vrijednosti masenog i volumnog protoka te snage po cilindru koji pokazuju da su visokotlačna pumpa LP11.2 i brizgaljka LI1 proizvođača Liebherr najprikladniji za ugradnju u motor V-46-TK tenka M84A.Tank M84A is one of the most used armored vehicles in the Croatian army. It uses a 12- cylinder Diesel engine V46-TK which develops a power of 735 kW. One of the ways of increasing mobility of M84A tank is increasing its engine power. Today, it is common for tank engines to have a power of 1100 kW. At that engine power, the M84A tank would have a specific power of 26,2 kW/t which is better than the most modern present tank, the Russian Armata (22.8 kW/t). The increase in engine power is often achieved by increasing the density of energy entering the engine, more specifically by increasing the mass of air charging system with higher capacity) and increasing the mass of fuel. In order to ensure efficient combustion, which also means lower fuel consumption and greater vehicle autonomy, it is necessary to have an injection system that can achieve high injection pressures, and thus good mixing of fuel and air. Modern systems that enable precise control of the amount of fuel injected and injection pressure are Common Rail systems. The V46-TK engine has a direct injection system which could be replaced by modern Common Rail system that would reise engine power to 1100 kW and would reduce noise and enviromental pollution. The most important components of fuel supply system are: high-pressurepump, injectors, pipelines, etc. To make the modernization successful, it is necessary to adequately replace these parts. A math calculation would result in certain values of mass and volume flow and power per cylinder. The calculation shows that the LP11.2 high – pressure pump and LI1 injectors from Liebherr are the most suitable ones for instalationin V-46TK engineof M84A tank