VALVE GP-PUMP CONTROL 2278307 - Caterpillar

Ether Injection System
Note: This system is an optional feature.The ECM automatically injects ether into the air inlet manifold when the following conditions are met:
The engine rpm is between 50 and 400 rpm.
The jacket water coolant temperature is less than 21 °C (70 °F).The duration of ether injection varies linearly with the jacket water coolant temperature. The duration of ether injection varies within the following range:
15 seconds at the maximum temperature of 21 °C (70 °F)
130 seconds at the minimum temperature of −40 °C (−40 °F)The longest duration of ether injection is 130 seconds even if the jacket water coolant temperature is less than −40 °C (−40 °F). A switch enables the operator to inject ether manually. This process can occur when the following conditions are met:
The switch for ether injection is in the manual position.
The engine rpm is more than 50 rpm.
The jacket water coolant temperature is less than 21 °C (70 °F).Air Shutoff
Note: This shutoff is an optional feature.The air shutoff uses a plate that rotates on a shaft in order to shut off inlet air to the aftercooler. The engine stops because of the restricted air supply to the combustion chamber. The air shutoff only actuates for the following conditions:
The Emergency Stop button is pressed.
An overspeed shutdown occurs.Cold Cylinder Cutout
Note: This cutout is an optional feature.The Cold Cylinder Cutout strategy is used so that the ECM may perform the following functions:
Reduce the white smoke for cold starting.
Minimize the duration of advanced timing (cold mode).
Reduce the use of ether injection.The ECM automatically turns off one electronic unit injector at a time during the following occurrences:
Cold start-up
Extended time at low idleThe ECM monitors the change of the fuel rack in order to determine if a cylinder is firing. If the cylinder is firing, the ECM activates the electronic unit injector. If the cylinder is not firing, the electronic unit injector remains deactivated. This configuration reduces white smoke.The following conditions must be met in order to activate the Cold Cylinder Cutout strategy:
The Cold Cylinder Cutout parameter is programmed to "ENABLE".
The engine rpm is equal to high idle rpm or less than high idle rpm.
The fuel rack is less than 13 mm (.5 inch).
The jacket water coolant temperature is less than 63 °C (145 °F).The Cold Cylinder Cutout strategy is activated under either of the following conditions:
Ten seconds after the engine reaches the low idle rpm
Three seconds after ether injection is completedThe following conditions will deactivate the Cold Cylinder Cutout strategy:
The Cold Cylinder Cutout parameter is programmed to "DISABLED".
The jacket water coolant temperature is more than 70 °C (158 °F).
The ET service tool is used for the cold cylinder cutout test.
The ether injection system is used.
The coolant temperature sensor has failed.
If the engine speed varies more than 50 rpm from the start of the Cold Cylinder Cutout, the Cold Cylinder Cutout deactivates for 3 seconds. A new engine speed is established when the Cold Cylinder Cutout reactivates.
If the engine rpm exceeds the high idle rpm, the Cold Cylinder Cutout deactivates