SYSTEM FOR CONTROLLING ENGINE PRIMING FLUID FLOW

A system is provided for automatically shutting off the flow of diethyl ether to an internal combustion engine after the temperature of the engine cooling system has reached a predetermined point. The diethyl ether is used as a cold weather diesel engine starting aid and is injected in vapor form directly into the air intake manifold and into the engine cylinders for firing by the reduced auto-ignition temperature of diethyl ether with respect to diesel fuel. The engine shut-off temperature is in a range which indicates that the engine is sufficiently warmed-up to be self sustaining through use of its normal fuel. The system prevents unwarranted and harmful excessive use of the starting aid.