Charge Air Cooler; Turbocharger Compressor Inlet Temperature Sensor - Detroit Diesel Series 60 EGR Technician Manual

SERIES 60 EGR TECHNICIAN'S MANUAL
Figure 2-23 Enhanced EGR Air Mixer

Charge Air Cooler

The Charge air cooler (CAC) is mounted in front of the cooling system radiator which is
connected to the turbocharger and the intake manifold. Compressed air leaving the turbocharger
is directed through the CAC before it goes to the EGR air mixer to be mixed with EGR exhaust
gases entering the intake manifold.
Cooling is accomplished by incoming fresh air flowing past the tubes and fins of charge air
cooler. Compressed intake charge air flowing inside the CAC core transfers heat to the tubes and
fins where it is transferred to the outside air.
The CAC is used to the reduce temperature of the compressed air leaving the turbocharger before
entering the intake manifold allowing for a more dense charge of air to be delivered to engine.

Turbocharger Compressor Inlet Temperature Sensor

Turbocharger Compressor Inlet Temperature Senor (TCI) is a DDC part and is installed by the
truck manufacturer within piping between the air filter and turbocharger inlet. The TCI sensor
which is used to control EGR operation in high humidity and heat conditions that may cause
damage to the engine is monitored by DDEC. The ECM will log a fault code for one or more
functions of this sensor. Each sensor mode is supplied a 5 V reference signal by the ECM and
returns a voltage signal to the ECM relative to temperature and humidity. Return voltage from
the TCI sensor increases as atmospheric humidity increases and return voltage decreases as air
inlet temperature increases.
The TCI operating values during normal engine operation are 0.23-4.93 V.
2-23
All information subject to change without notice. (Rev. June 2005)
7SE60 0506 Copyright © 2005 DETROIT DIESEL CORPORATION