Range Rover P38
12
ENGINE
NEW RANGE ROVER
6
DESCRIPTION AND OPERATION
Intercooler
To lower the temperature of the charge air, and
therefore increase its density, an intercooler is fitted
between the turbocharger and the charge air collector.
Charge air collector
The charge air collector is bolted to the cylinder head
and consists of a manifold having a single inlet and six
individual outlets, one to each cylinder. Intake charge
air pressure and charge air temperature sensors
mounted on the collector are linked to the control unit
of the DDE system. The air temperature sensor has a
black connector and is fitted at the front of the air
collector. The pressure sensor is a small, black plastic
sensor mounted on the fuel filter bracket. It is
connected to the air collector through a tube.
Operation
When the engine is running, exhaust gas impinges on
the turbine vanes of the turbocharger causing the
turbine to rotate. The rotor shaft transmits drive from
the turbine to the inlet centrifugal compressor. Air is
drawn into the compressor from the air cleaner and
compressed air is discharged to the charge air
collector via the intercooler.
Charge air pressure is regulated by operation of the
by-pass plate.
1. By-pass plate actuator
2. Charge air pressure sensor
3. Intake air (charge air) temperature sensor
4. DDE system control unit