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)