User Manual

Chapter 10

BOSCH HDI EDC 15C2 INJECTION SYSTEM AND PARTICLE FILTER

VI - DIFFERENTIAL PRESSURE SENSOR (1341)

A - ROLE

The sensor permanently measures the pressure difference of the exhaust gases,

between the inlet and the outlet of the particle filter, to determine the status of the

filter (clogging problems or damage to filter).

B - DESCRIPTION

SDI019D

REF

g - HI: Particle filter upstream information input (diameter 4.32 mm)

h - REF: Particle filter downstream information input (diameter 4.32 mm)

j - White marking

k - Electrical connector

l - Membrane

The sensor comprises the following components:

• electronics for amplifying the signal,

• a sealed membrane.

The membrane is subject to the following pressures:

• the inlet pressure of the particle filter (upstream),

• the outlet pressure of the particle filter (downstream).

The sensor provides a voltage proportional to the pressure differential measured

by the membrane (pressure differential = upstream pressure - downstream

pressure).

IMPORTANT: Do not invert the upstream and downstream information pipes

(malfunction of the filtration system). Management of the particle

filter depends on this information.

cardiagn.com