Warming-up apparatus for internal combustion engine

Claim 1

In an internal combustion engine having an intake manifold, a water pump adapted to circulate and recirculate a coolant through a cooling circuit, a cooling fan and a carburetor with a throttle valve, a warming-up system comprising, in combination, a source of d.c. voltage supply, a coolant temperature responsive switch associated with the engine and electrically connected to said source of d.c. voltage supply, said coolant temperature responsive switch being closed when the temperature of the coolant in the cooling circuit is below a predetermined level, a relay switch electrically connected through said coolant temperature responsive switch to said source of d.c. voltage supply, said relay switch being closed when said coolant temperature responsive switch is closed, an electro-magnetic clutch electrically connected to said relay switch and engaged when said relay switch is closed for stopping operations of said cooling fan and said water pump, a timer relay electrically connected to said coolant temperature responsive switch, an ignition timing change-over device comprising a retarding breaker contact assembly connected through said timer relay to an ignition coil and an advancing breaker contact assembly directly connected to said ignition coil, said timer relay being closed to actuate said retarding breaker contact assembly to retard ignition timing when said coolant temperature responsive switch is closed; and a throttle opening device responsive to the temperature of the coolant, said throttle opening device increasing the opening degree of said throttle valve when the temperature of the coolant is below said predetermined level.