Fuel conservation and emission reduction through novel waste heat recovery for internal combustion engines

► Variable oil pumps reduce the heat transfer between engine and oil by 50%. ► Exhaust gas/oil heat exchangers can reduce fuel usage by over 7%. ► NOx and CO emissions are also reduced by such systems. ► Water condensation contributes up to 50% of usable exhaust heating power. ► A simple external engine oil bypass can achieve similar benefits.