Muffler and fuel saving device for internal combustion diesel engine

An improved muffler and energy saving device for diesel engines comprising a housing having an inlet passageway for admitting gases into the interior of the housing and an outlet passageway for discharging gases from the housing, an alcove, near the entrance of the housing, to capture unburned components from the exhaust stream which are returned to the air induction manifold of the engine. Baffles disposed within the housing break up the exhaust pulses to reduce sound emission while permitting the free flow of exhaust gases between the inlet and outlet ports of the muffler. The muffler creates negligible internal back pressure due to the large passageways provided and is therefore not subject to the problems associated with plugging or clogging.