Jenbacher: Documentation [PDF]

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5.1.1



Jenbacher



DESCRIPTION



Documentation



1.



General: _______________________________________________________2



2.



Engine principle: ________________________________________________2



3.



Crankcase:_____________________________________________________2



4.



Oil pan:________________________________________________________2



5.



Cylinder liners: _________________________________________________2



6.



Cylinder heads: _________________________________________________3



7.



Crankshaft: ____________________________________________________4



8.



Connecting rod: ________________________________________________4



9.



Vibration damper: _______________________________________________5



10.



Main and big-end bearing shells: __________________________________5



11.



Pistons: _______________________________________________________6



12.



Gear train: _____________________________________________________7



13.



Timing gear:____________________________________________________8



14.



Exhaust gas turbocharger: _______________________________________9



15.



Engine oil pump: _______________________________________________10



16.



Engine cooling water pump: _____________________________________11



17.



Starter: _______________________________________________________11



18.



Air-gas mixer: _________________________________________________11



Keyword:



Doreen Power Generation 3/3



Unit no.:



J E963



Module type :



JGS 620 GS-N.L



Version:



E01



Issued:



Doku./schartner



Checked:



Dokumentation



5_1_1___B_J620E_EN.doc



Index:



d



EN



Module no.: 564243 1-8 Engine no.: 564244 1/564245 1/564246 1/564247 1/564248 1/564249 1/564250 1/564251 1 Date: 2004-07 Page - No.: 1 / 11



5.1.1



Jenbacher



DESCRIPTION



Documentation



1.



General: The GE JENBACHER GAS ENGINE works on the 4-stroke principle and is a water-cooled 20 cylinder Vengine (60°) with an exhaust gas turbocharger for pressure charging of the intake mixture.



2.



Engine principle: GE Jenbacher gas engines use the LEANOX method, which is a further development of the lean-mix engine principle. Here the engine is supplied with a mixture of gas and a surplus of air to minimise emissions already at the combustion stage in the engine.



3.



Crankcase: The crankcase is a special casting and features side crankcase covers that provide easy access during assembly/disassembly. The flywheel-sided gear train is sealed off by the gearbox, and the vibration damper-sided geartrain by the crankcase cover.



4.



Oil pan: The oil pan is made out of welded steel plate and closes off the bottom of the crankcase.



5.



Cylinder liners: The cylinder liners are wet and can be exchanged individually. They are spun cast and are inserted into the cylinder block from above. As they heat up they are free to expand downwards. The water room and the crankcase are separated by O-rings on the outside of the cylinder liners.



Scraper ring



Cylinder head gasket



O-Ring Water room



Engine oil duct (Piston cooling nozzle) Crankcase



Keyword:



Doreen Power Generation 3/3



Unit no.:



J E963



Module type :



JGS 620 GS-N.L



Version:



E01



Issued:



Doku./schartner



Checked:



Dokumentation



5_1_1___B_J620E_EN.doc



Index:



d



EN



Module no.: 564243 1-8 Engine no.: 564244 1/564245 1/564246 1/564247 1/564248 1/564249 1/564250 1/564251 1 Date: 2004-07 Page - No.: 2 / 11



5.1.1



Jenbacher



DESCRIPTION



Documentation



Cylinder heads: The water-cooled cylinder heads can be exchanged separately and are equipped with two intake and two exhaust valves, a precombustion chamber with a precombustion chamber gas valve and one spark plug on each cylinder. The intake and exhaust valves feature a valve rotation device (Rotocaps). The pressed valve seat rings can be renewed.



Rotocap



Valve spring



Valve guide



Mixture



Exhaust



Water room



Exhaust valve



Intake valve



Valve seat



Precombustion chamber gas valve



Spark plug



Exhaust Mixture



6.



Precombustion chamber



Water room



Keyword:



Doreen Power Generation 3/3



Unit no.:



J E963



Module type :



JGS 620 GS-N.L



Version:



E01



Issued:



Doku./schartner



Checked:



Dokumentation



5_1_1___B_J620E_EN.doc



Index:



d



EN



Module no.: 564243 1-8 Engine no.: 564244 1/564245 1/564246 1/564247 1/564248 1/564249 1/564250 1/564251 1 Date: 2004-07 Page - No.: 3 / 11



5.1.1



Jenbacher



DESCRIPTION



Documentation



7.



Crankshaft: The drop-forged crankshaft runs on eleven bearings, is statically and dynamically balanced and has bolted-on counterweights. All bearing journals have been surface hardened and fine polished. One of the main bearings is designed as a guide bearing and takes the axial forces exerted by the crankshaft. The crankshaft main bearings are lubricated via oil ducts in the crankcase. A balanced flywheel with starter pinion is mounted on one end of the crankshaft, and at the other end a vibration damper is fitted. Connecting rod bearing



Oil ducts



Crankshaft toothed gear



8.



Main bearing



Counterweight



Connecting rod: The connecting rods are drop-forged and quenched and tempered. They are separated diagonally across the big-end and have serrated joins. The cross-section is designed as an I-profile to provide maximum stability of the connecting rods. The big-end bearing shells are replaceable plain bearings. The small end bushings are pressed in. The big-end bearings are lubricated via oil ducts in the crankshaft. The gudgeon pins are supplied with oil from the piston cooling nozzles.



Keyword:



Doreen Power Generation 3/3



Unit no.:



J E963



Module type :



JGS 620 GS-N.L



Version:



E01



Issued:



Doku./schartner



Checked:



Dokumentation



5_1_1___B_J620E_EN.doc



Index:



d



EN



Module no.: 564243 1-8 Engine no.: 564244 1/564245 1/564246 1/564247 1/564248 1/564249 1/564250 1/564251 1 Date: 2004-07 Page - No.: 4 / 11



5.1.1



Jenbacher



DESCRIPTION



Documentation



9.



Vibration damper: A viscous damper is used to reduce rotational vibrations on the crankshaft. This viscous damper consists of a completely sealed housing into which a flywheel is mounted. The cavities between housing and flywheel are filled with silicone oil.



Flywheel Cavities Housing



10. Main and big-end bearing shells: Two-part, replaceable crankshaft main bearings and big-end bearings. Sputter bearing Big end bearing: upper bearing shell lower bearing shell Main bearing: upper bearing shell lower bearing shell



3-material bearing



X X X X



Keyword:



Doreen Power Generation 3/3



Unit no.:



J E963



Module type :



JGS 620 GS-N.L



Version:



E01



Issued:



Doku./schartner



Checked:



Dokumentation



5_1_1___B_J620E_EN.doc



Index:



d



EN



Grooved bearing



Module no.: 564243 1-8 Engine no.: 564244 1/564245 1/564246 1/564247 1/564248 1/564249 1/564250 1/564251 1 Date: 2004-07 Page - No.: 5 / 11



5.1.1



Jenbacher



DESCRIPTION



Documentation



11. Pistons: The light metal alloy pistons feature a cooling duct and are equipped with a plain compression ring, taper face compression ring and oil-control ring with expander. Cooling oil is supplied via fixed spray nozzles mounted in the crankcase.



Oil control ring with expander Plain compression ring Cooling oil duct



Taper face compression rings



Piston



Gudgeon pin



Injection nozzle



Keyword:



Doreen Power Generation 3/3



Unit no.:



J E963



Module type :



JGS 620 GS-N.L



Version:



E01



Issued:



Doku./schartner



Checked:



Dokumentation



5_1_1___B_J620E_EN.doc



Index:



d



EN



Module no.: 564243 1-8 Engine no.: 564244 1/564245 1/564246 1/564247 1/564248 1/564249 1/564250 1/564251 1 Date: 2004-07 Page - No.: 6 / 11



5.1.1



Jenbacher



DESCRIPTION



Documentation



12. Gear train: The gear train at the flywheel side provides drive for the camshaft and the engine oil pump. The crankshaft toothed gear, the intermediate gears and the camshaft timing gear all have timing marks to ensure that the timing is correctly adjusted. Gear train (flywheel-sided):



Camshaft timing gear



Intermediate gear



Driving gear of engine oil pump Crankshaft toothed gear



Keyword:



Doreen Power Generation 3/3



Unit no.:



J E963



Module type :



JGS 620 GS-N.L



Version:



E01



Issued:



Doku./schartner



Checked:



Dokumentation



5_1_1___B_J620E_EN.doc



Index:



d



EN



Module no.: 564243 1-8 Engine no.: 564244 1/564245 1/564246 1/564247 1/564248 1/564249 1/564250 1/564251 1 Date: 2004-07 Page - No.: 7 / 11



5.1.1



Jenbacher



DESCRIPTION



Documentation



13. Timing gear: The camshaft runs on eleven bearings in replaceable bushings, and is driven by the crankshaft via intermediate gears. The rocker arms on the intake and exhaust valves are operated by the camshaft by means of tappets and push rods. An adjustment bolt on each rocker arm is used for accurate adjustment of the tappet clearance. Pressurised oil is used to lubricate the tappets and the rocker arm mountings, whereby the oil is supplied to each rocker arm through a bore in the push rod. The other moving parts in the cylinder head are lubricated by the spray oil emerging at the rocker arm mountings.



Adjustment bolt (tappet clearance)



Valve stems Rocker arm bracket



Exhaust valves



Rocker arm (intkae)



Rocker arm (exhaust)



Push rods Adjustment bolt



Keyword:



Doreen Power Generation 3/3



Unit no.:



J E963



Module type :



JGS 620 GS-N.L



Version:



E01



Issued:



Doku./schartner



Checked:



Dokumentation



5_1_1___B_J620E_EN.doc



Index:



d



EN



Module no.: 564243 1-8 Engine no.: 564244 1/564245 1/564246 1/564247 1/564248 1/564249 1/564250 1/564251 1 Date: 2004-07 Page - No.: 8 / 11



5.1.1



Jenbacher



DESCRIPTION



Documentation



14. Exhaust gas turbocharger: The exhaust gases entering the turbine housing drive the turbine wheel, and therefore also the compressor impeller which sits on the same shaft as the turbine wheel. The compressor impeller sucks air-gas mixture from the air-gas mixer and passes it on under pressure via the mixture cooler (mixture/water heat exchanger) and the throttle valve to the intake chamber of the engine. The exhaust gas turbocharger is lubricated by the engine lubricating system.



Mixture



Exhaust gas



Plain bearing



Turbine wheel



Compressor impeller



Mixture



Engine oil



Engine oil



Exhaust gas



Keyword:



Doreen Power Generation 3/3



Unit no.:



J E963



Module type :



JGS 620 GS-N.L



Version:



E01



Issued:



Doku./schartner



Checked:



Dokumentation



5_1_1___B_J620E_EN.doc



Index:



d



EN



Module no.: 564243 1-8 Engine no.: 564244 1/564245 1/564246 1/564247 1/564248 1/564249 1/564250 1/564251 1 Date: 2004-07 Page - No.: 9 / 11



5.1.1



Jenbacher



DESCRIPTION



Documentation



15. Engine oil pump: GE Jenbacher engines are equipped with a forced feed lubrication system. A mechanical gear pump is used as the engine oil pump.



Driving gear



O-ring



Oil pump gear wheel



Control oil Motoröl Engine oil



Engine oil



(from the oil pan)



(to the oil cooler)



Keyword:



Doreen Power Generation 3/3



Unit no.:



J E963



Module type :



JGS 620 GS-N.L



Version:



E01



Issued:



Doku./schartner



Checked:



Dokumentation



5_1_1___B_J620E_EN.doc



Index:



d



EN



Module no.: 564243 1-8 Engine no.: 564244 1/564245 1/564246 1/564247 1/564248 1/564249 1/564250 1/564251 1 Date: 2004-07 Page - No.: 10 / 11



5.1.1



Jenbacher



DESCRIPTION



Documentation



16. Engine cooling water pump: The cooling water is pumped around the closed engine cooling system by means of a elecrtical pump.



17. Starter: A co-axial type electric starter motor is used.



18. Air-gas mixer: In the air-gas mixer, a propellant is added to the intake air via a variable gas aperture in order to create a burnable air-gas mixture. The size of the gas aperture is increased/decreased by a servomotor, as a result of which the amount of gas and hence the air ratio λ can be varied. The air-gas mixer is part of the LEANOX control system. actual air charge supplied for combustion stoichiometrically required air charge



Gas



Air ratio λ =



Air



Mixture



Servomotor



Gas aperture



Keyword:



Doreen Power Generation 3/3



Unit no.:



J E963



Module type :



JGS 620 GS-N.L



Version:



E01



Issued:



Doku./schartner



Checked:



Dokumentation



5_1_1___B_J620E_EN.doc



Index:



d



EN



Module no.: 564243 1-8 Engine no.: 564244 1/564245 1/564246 1/564247 1/564248 1/564249 1/564250 1/564251 1 Date: 2004-07 Page - No.: 11 / 11