Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 13
The oil pressure sensor measures engine oil pressure in kPa. Oil pressure is
used for engine protection whereby if insufficient oil pressure is measured for
a given speed, an event for low oil pressure would be raised.
2.1.6 Air System
The engine air system contains the following electronic components.
o Intake Manifold Temperature Sensor
o Intake Manifold Pressure Sensor
o Turbocharger Wastegate Regulator
The intake manifold pressure sensor measures the air pressure inside the
intake manifold, after the turbo and NRS mixer. There are two sensor options
dependent upon the choice of rating. The pressure sensor is used in a
number of engine management control strategies contained within the engine
ECM. The intake manifold temperature sensor measures the temperature of
the mixed air inside the inlet manifold. The sensor measurement range is –40
to 150°C
The regulator valve controls the pressure in the intake manifold to a value that
is determined by the ECM. The wastegate regulator provides the interface
between the ECM and the mechanical system that regulates intake manifold
pressure to the desired value that is determined by the engine software.
2.1.7 Emissions System Assist Devices
The 1204 and 1206 Tier 4 Final product range are fitted with exhaust back
pressure valve that are used to provide engine exhaust temperature
management for a number of engine control strategies including
Aftertreatment regeneration. The exhaust back pressure valve is designed to
be used during engine operation as required without causing any engine
performance impact.
The DPF product range also uses a post injection HC dosing event to aid
SCR system cleaning during engine operation. Use of this strategy is fully
automatic and requires no operator intervention.
2.2 Aftertreatment System Sensor & Actuator Details
2.2.1 PM Capture Devices
The Tier 4 Final product range use both in cylinder PM (Particulate Matter)
reduction methods and additional PM capture (DPF) exhaust system
components. For low power 1204F ratings all PM management is made in
cylinder removing the need for an engine DPF. Ratings above 110kW are
supplied with a Diesel Particulate Filter (along with a DOC & SCR system) to
meet the Tier 4 Final PM reduction targets.
All Diesel Particulate Filter technology used by the 1204F to 1206F product
range uses Low Temperature regeneration methods to remove the soot build
up within the filter.