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45
The ECM monitors driving style and selects a suitable time to
employ regeneration. Cars driven a lot at idling speed and low
load will attempt to regenerate earlier than cars driven more with
higher load and speed. For regeneration to take place, a
prolonged high exhaust temperature must be obtained.
In the event of the car being driven in such a way that
regeneration is not possible, i.e., frequent short journeys, a
diagnostic trouble code will eventually be registered in addition to
the DPF light and “Check Engine” indicators displaying. A service
regeneration can be requested in the workshop using the
diagnostic tool.
DPF regeneration is used to clear PM (Particulate Matter) from the
DPF filter through continuous combustion oxidation mode (such as
high-temperature heating combustion, fuel additive or catalyst
reduce PM ignition combustion) to stabilize the filter performance.
DPF regeneration may be performed in the following cases:
The exhaust back pressure sensor is replaced.
The PM trap is removed or replaced.
The fuel additive nozzle is removed or replaced.
The catalytic oxidizer is removed or replaced.
The DPF regeneration MIL is on and maintenance is performed.
The DPF regeneration control module is replaced.
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