Heat-exchange arrangements between the air intake and exhaust gas passages, e.g. by means of contact between the passages

Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture > for heating > combustion-air or fuel-air mixture > by hot gases, e.g. by mixing cold and hot air > the gases being exhaust gases > Heat-exchange arrangements between the air intake and exhaust gas passages, e.g. by means of contact between the passages

Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture (carburettors with heating, cooling or thermal insulating means for combustion-air, fuel or fuel-air mixture F02M15/00; apparatus for de-liquefying non-liquid fuels by heating F02M21/06; apparatus having heating means for non-gaseous fuels with low melting point F02M21/10; apparatus characterised by adding hot secondary air to fuel-air mixture F02M23/14; fuel-injection apparatus characterised by having heating, cooling or thermally insulating means F02M53/00) > for heating ( for purifying liquid fuel F02M37/30) > combustion-air or fuel-air mixture (electrically F02M31/12; by using heat from working cylinders or cylinder heads F02M31/14; heating of combustion-air as an engine starting aid F02N7/04) > by hot gases, e.g. by mixing cold and hot air > the gases being exhaust gases > Heat-exchange arrangements between the air intake and exhaust gas passages, e.g. by means of contact between the passages