Auxiliary apparatus for hot-starting internal combustion engine

Claim 1

An auxiliary apparatus for hot-starting an engine comprising: an intake manifold, said manifold having an opening in one end thereof and being directly connected to an intake port opening into a cylinder at the other end thereof; an intake pipe opening into said intake manifold, at an intermediate portion thereof between and spaced from said ends thereof; a secondary air injection nozzle having one end extending through said opening in said one end of said manifold and terminating in the space between said intake pipe and said one end of said manifold whereby said nozzle will not interfere with intake flow from said intake pipe; an air pump for supplying pressurized secondary air to said secondary air injection nozzle; a secondary air supply conduit for fluidly communicating said air pump and said secondary air injection nozzle; an electromagnetic valve comprising: a body having an opening in one end thereof, the other end of said nozzle being in direct fluid communication with said opening in said body; a valve means disposed between said secondary air supply conduit and said secondary air injection nozle for opening and closing fluid communication between said conduit and said nozzle through said opening in said body, and a solenoid coil for actuating said valve means; and means for operating said solenoid coil to actuate said valve means only when the temperature of the intake passage exceeds a predetermined level and only at the time of cranking the engine, said operating means comprising: an input circuit for said solenoid coil, a thermoswitch electrically connected to said input circuit, and a starter motor switch electrically connected to said input circuit in series with the thermoswitch.