VALVE (Exhaust) 1W1819 - Caterpillar

The cold start strategy helps to provide the following features:
Improved cold starting capability
Decreased deep cycling of the battery
White smoke cleanup
Shorter warm up period
Extended engine lifeThis engine is equipped with an Ether Injection System to provide improved cold starting capability. There are two possible modes of operation for the Ether Injection System. In the Automatic Mode, operation of the system is controlled by the Electronic Control Module (ECM). In the Manual Mode, operation of the Ether Injection System is controlled by the operator. For more information, refer to this Operation and Maintenance Manual, "Cold Weather Starting".The timing advance is adjusted during cranking in order to promote fast starting of the engine. The ECM applies a specific engine timing that will promote quick starting in any ambient condition. As the engine speed increases toward low idle speed the engine timing is readjusted. The engine timing control is then passed to the timing circuit that best fits the conditions that are present.Cold Mode operation provides the engine with an elevated engine idle speed that is used to provide a shorter warm up period. White smoke is controlled during Cold Mode by limiting the amount of fuel that is delivered to the cylinder. The engine will operate in Cold Mode until a predetermined coolant temperature or a predetermined time is achieved.