Essential reading:SPINČIĆ, A., PRITCHARD, B, An English Textbook For Marine
Engineers 2, Pomorski fakultet, Rijeka 2009.LUZER, J., SPINČIĆ, A., Gramatička vježbenica engleskog
jezika za pomorce, Pomorski fakultet, Rijeka 2003.
Tomislav Skračić, MA
Undergraduate English Course for
MARINE ENGINEERS4th Semester
LESSON 10
AIR AND EXHAUST SYSTEMSAND TURBOCHARGERS
Lesson 10Lesson 10Air and Exhaust Systems and TurbochargersAir and Exhaust Systems and Turbochargers
KEY WORDS
turbocharger (n.) - turbopuhaloturbocharging (n.) - prednabijanjenozzle ring - prsten sapniceannular form - prstenast oblikoutlet casing - dimnjakdiminish in thickness - čija se debljina smanjujeimpeller (n.) - impelerdiffuser (n.) - razdjelnik, difuzorstationary blade - statorska (nepomična) lopaticaimpart (v.) - predati, prenijeticharge air cooler = intercooler - rashladnik zrakaexhaust gas boiler = economiser - kotao za ispušne plinove
1. GENERAL
The power of any diesel engine is determined by the amount of fuel burnt in each cylinder per cycle and the speed at which it can run.
The quantity of air provided by turbocharging is so great that the amount of fuel burnt per cylinder is not limited on this account but because of the temperature that can be withstood by exhaust valves, cylinder heads and pistons.
Diesel fuel requires about 14.5 times its own mass of air for its complete combustion.
2. TURBOCHARGER FUNCTIONS
a) Pressure charging
b) Scavenging
The more oxygen during the engine compression stroke, the larger the amount of fuel to be ignited and therefore an increased engine output developed.
3. TURBOCHARGER DEFINITION
Turbocharger is a turbine driven air compressor powered by exhaust gases from the internal combustion engine.
4. OPERATION
exhaust gases (waste gases)
3. TURBOCHARGER DEFINITION
Turbocharger is a turbine driven air compressor powered by exhaust gases from the internal combustion engine.
4. OPERATION
exhaust gases (waste gases)
turbine (turbine wheel)
Turbine wheelTurbine wheel
Turbine wheelTurbine wheel
3. TURBOCHARGER DEFINITION
Turbocharger is a turbine driven air compressor powered by exhaust gases from the internal combustion engine.
4. OPERATION
exhaust gases (waste gases)
turbine (turbine wheel)
centrifugal compressor (compressor; air compressor)
3. TURBOCHARGER DEFINITION
Turbocharger is a turbine driven air compressor powered by exhaust gases from the internal combustion engine.
4. OPERATION
exhaust gases (waste gases)
turbine (turbine wheel)
centrifugal compressor (compressor; air compressor)
intercooler (charge air cooler)