http://hu.wikipedia.org/wiki/Bels%C5%91_%C3%A9g%C3%A9s%C5%B1_motor
http://image.streetrodderweb.com/f/35161140/1012sr_02_o+general_motors_performance_parts_E_ROD_motor_program+E_ROD_LS3.jpg
http://www.iz-hera.si/img/gui/vss/strojnistvo.jpg
http://upload.wikimedia.org/wikipedia/commons/a/a6/4-Stroke-Engine.gif
http://upload.wikimedia.org/wikipedia/commons/5/52/Arbeitsweise_Zweitakt.gif
http://upload.wikimedia.org/wikipedia/commons/8/89/Diesel_Engine_%284_cycle_running%29.gif
http://www.frcomoto.si/image/cache/data/BATI/BAT%20ANVADL!-500x500.gif
http://www.mobisux.com/album/data/500/44377gred.jpg
http://www.frcomoto.si/image/cache/data/motobike/svecica%20F100%20Bosna%20(399%20x%20471)-500x500.jpg
http://www.tunap.com/assets/images/Bereiche/Automotive/Ventil-ohne-Verschleiss.gif
http://www.tnet-autoalkatresz.hu/userfiles/Image/Foto_bravadob.jpg
http://www.gearsandstuff.com/images/gear_types/spur_gear.jpg