RING-PISTON 1051746 - Caterpillar

The information from the sensors enables the Electronic Control Module (ECM) to control the engine as efficiently as possible over a wide range of operating conditions.The sensors also enable the module to activate alarms, impending shutdowns, and shutdowns in response to abnormal operation. The functions of the sensors are described below.
Illustration 1 g01442416
Right side view
(1) Engine oil temperature sensor
(2) Pressure switch for the coolant pump (inlet)
(3) Pressure sensor for unfiltered oil
(4) Pressure sensor for filtered oil Engine oil temperature sensor (1) - An oil temperature sensor measures the engine oil temperature. A high oil temperature will activate an alarm or a shutdown. The trip points can be programmed with the Caterpillar Electronic Technician (Cat ET). To observe the output value of the sensor, use Cat ET to view the "Engine Oil Temperature" parameter.Pressure switch for the coolant pump (inlet) (2) - A pressure switch is located at the inlet for the engine jacket water. If the inlet pressure is too high, the switch will activate a shutdown. To observe the status of the switch, use the Caterpillar Electronic Technician (Cat ET) to view the "Engine Coolant Pump Pressure" parameter.Oil pressure sensors (3) and (4) - The engine oil pressure is measured before the oil filters (3) and after the oil filters (4). An alarm or a shutdown can be activated by any of the following occurrences: low filtered oil pressure, low oil filter differential pressure and high oil filter differential pressure. The trip point for the activation of a warning or a shutdown for oil filter differential pressure can be programmed with Cat ET. To observe the value of the output of the sensor, use Cat ET to view the "Engine Oil Pressure" or the "Unfiltered Engine Oil Pressure" parameter.
Illustration 2 g01442420
Typical front and left side
(5) Compressor discharge pressure sensor (if equipped with ASM)
(6) Air inlet pressure sensor (optional location)
(7) Detonation sensor Compressor discharge pressure sensor (5) - This sensor only applies to engines that are equipped with an Auxiliary Sensing Module (ASM). The sensor is located at the top of the duct between the compressor outlet and the inlet to the throttle. The ASM uses the signal from this sensor to rapidly respond to changes in engine load.Air inlet pressure sensor (6) - This sensor is connected to the inlet manifold. If the engine is equipped with an ASM, the sensor is located at the rear of the manifold. Otherwise, this sensor is located at the front of the manifold. The sensor monitors the absolute manifold pressure. This is the atmospheric pressure plus the gauge pressure. The information is used by the ECM to calculate the air flow. To observe the output value of the sensor, use Cat ET to view the "Inlet Manifold Air Pressure (abs)".Detonation sensors (7) - The detonation sensors monitor the engine for mechanical vibrations. Each sensor monitors two cylinders. The sensor produces a voltage signal that is proportional to the engine detonation. This information is processed by the ECM in order to determine detonation