Apparatus for heating an intake manifold in an internal combustion engine

摘要

Apparatus for heating an intake manifold in an internal combustion engine comprising a heating chamber for heating an intake manifold, arranged below a riser portion of the latter and communicated with the inside of an exhaust reactor; a by-pass for the exhaust gas provided in the reactor, the upstream end thereof opening into said heating chamber and the downstream end opening into a passage connecting the inside of the reactor to an exhaust pipe; and control valve means provided in said passage adjacent to the downstream end of the by-pass to alternatively divert the flow route of the exhaust gas.