User Manual

Chapter 13
BOSCH HDI EDC 15C2 INJECTION SYSTEM AND PARTICLE FILTER
127
Operation:
FUEL ADDITIVE FUNCTION:
ENGINE STATIONARY
FUEL ADDITIVE FUNCTION:
ENGINE RUNNING
Engine off Non zero vehicle speed
Memorising of the fuel level "n1" Zero vehicle speed
Opening of the fuel filler cap Opening of the fuel filler cap
Memorising of the fuel filler cap open Memorising of the fuel level "n1"
Closing of the fuel filler cap Closing of the fuel filler cap or non zero
vehicle speed
Starting of the engine Acquisition of the fuel level "n2" -
checking of the position of the fuel filler
cap
Acquisition of the fuel level "n2" - checking
of the position of the fuel filler cap
Case 1: n2 > n1 and fuel filler cap cycle (*) -> fuel additive function - normal operation
Case 2: n2 > n1 and fuel filler cap cycle faulty or no cycle -> fuel additive function -
fuel filler cap faulty
Case 3: n2 = n1 and fuel filler cap cycle -> fuel additive equal to pumping limit (7
litres)
Case 4: n2 = n1 and fuel filler cap cycle faulty or no cycle -> nothing - normal
operation
(*) fuel filler cap cycle:
• opening of the fuel filler cap,
• closing of the fuel filler cap.
The fuel filler cap cycle is effective if the time interval between opening and
closing is greater than 5 seconds.
B - TOTAL AMOUNT OF ADDITIVE INJECTED
Every time additive is added, the additive ECU memorises the amount of
additive injected.
This value is added to the previously injected values to give a value representing
the total amount of additive injected since the beginning of the particle filter's life.
This value is sent to the injection ECU which uses it as the basis for controlling
the clogging level of the particle filter with cerine.
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