LINER-CYLINDER BLOCK 3221126 - Caterpillar

Illustration 1 g01394637
Left side and rear views of a typical G3408 or G3412 Engine
(1) Detonation sensor
(2) Speed sensor
Illustration 2 g01394638
Right side and front of a typical G3408 or G3412 Engine
(3) Nitrous oxide sensor or oxygen sensor
(1) Detonation sensor
(4) Inlet manifold pressure sensor
(5) Speed/timing sensor
Illustration 3 g01394803
Partial view of the top of a typical G3408 or G3412 Engine
(6) Inlet manifold temperature sensor The sensors provide signals to the control module. The control module uses the signals in order to provide the signals to the transformers at the appropriate time. (1) Detonation sensors Detonation sensors produce voltage signals that are proportional to the level of detonation. The control module uses the signals from the detonation sensors in order to determine the level of detonation. To eliminate detonation, the control module will retard the ignition timing. (2) Speed sensor The engine speed sensor provides a signal to the electronic ignition system that indicates the speed of the engine. The electronic ignition system uses the signal in order to govern the speed of the engine. The speed sensor (magnetic pickup) is installed in the left side of flywheel housing. (3) Nitrous oxide sensor (if equipped) The nitrous oxide sensor is located in the outlet for the exhaust system. The sensor monitors the amount of nitrous oxide in the exhaust. If the level of nitrous oxide is greater than the level that is programmed into the engine control module (ECM), the ECM will adjust the engine so that the level is acceptable. (3) Oxygen sensor (if equipped) The oxygen sensor is located in the outlet for the exhaust system. The oxygen sensor monitors the amount of oxygen in the exhaust. (4) Inlet manifold pressure sensor The control module uses the signal from the inlet manifold pressure sensor in order to determine the engine load. (5) Speed/timing sensor The speed/timing sensor provides information to the control module about the position of the crankshaft and the engine rpm. The control module uses the information in order to determine the ignition timing. (6) Inlet manifold temperature sensor The inlet manifold temperature sensor provides a signal to the EIS that indicates the temperature of the air/fuel mixture in the inlet manifold. The EIS uses the information in order to control the air/fuel ratio.