SSP 336 The Catalytic Coated Diesel Particulate Filter - Volkspage

Design and function
The injection cams
On diesel engines with unit injector technology and diesel particulate filter, the contour of the injection cam has
been modified for the extended injection period.
Compared to an engine without diesel particulate filter, the injection cam is designed so the downwards motion of
the pump plunger is longer. In this way, there is enough stroke available to allow extended injection at a later stage.
Rocker roller
finger
Ball head pins
Injection cams
Pump plunger
Plunger spring
S336_216
Contour of cam on diesel engines with unit injector system and no diesel particulate filter
Contour of cam on diesel engines with unit injector system and diesel particulate filter
Please refer to setting specifications in workshop manual when installing unit injector.
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