with means for adding fluids other than exhaust gas to the recirculation passage; with reformers

Full Title

Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems > Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories > with means for adding fluids other than exhaust gas to the recirculation passage; with reformers