INTRODUCTION
Page 11
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Figure 3 — MP7 Left Side View — Low Cab Forward (LCF) Chassis
Exhaust Gas Recirculation — 2007
There are two configurations of the new EGR
system. For engines installed on conventional
chassis, the EGR mixer attaches to the inlet
manifold at the top front of the engine. For low
cab forward (LCF) chassis, the mixer attaches
toward the rear of the inlet manifold. The right
side views of the engines are nearly identical.
The left side views display the arrangement of
components that accommodate the two
configurations.
The new MP7 EGR system features a venturi with
Delta Pressure sensors. The MASS flow tube has
been replaced. The new combination is easy to
service.
Variable Geometry Turbocharger
The Holset Variable Geometry Turbocharger
(VGT) features fixed vanes with a sliding nozzle
ring. The nozzle position is infinitely variable
between open and closed. This design reacts
quickly to exhaust pressure and controls inlet
pressure more precisely. Reliability is enhanced
by having fewer moving parts. Its actuator and
bearing housing are water cooled and engine oil
lubricated for greater durability.
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