INSTALLATION
MANUAL
© Scania CV AB 2018, Sweden
Periodic hydrocarbon evaporation for Stage IV/V/Tier 4f engines
01:07 Issue 17 en-GB 58
Engines without exhaust brake
If the engine is not equipped with an exhaust brake, the following occurs:
1. A warning indicating that the engine should be warmed up is sent via CAN from
the control unit to the coordinator.
2. If the engine is not warmed up and has been configured with engine shutdown,
the engine is switched off.
Engines with exhaust brake
1. DC09 and DC13.
2. DC16.
If the engine is equipped with an exhaust brake, the following occurs:
1. A warning indicating that the engine should be warmed up is sent via CAN from
the control unit to the coordinator.
2. A request for activation of periodic hydrocarbon evaporation, i.e. automatic in-
crease of the engine speed, is sent via CAN from the control unit to the coordi-
nator.
– The function is activated if a confirmation for allowed activation of the func-
tion is sent via CAN from the coordinator to the control unit. The engine speed
is raised and the exhaust gas temperature increases so that hydrocarbons are
evaporated. The raised engine speed is active for a maximum of 45 minutes.
The function is interrupted when the throttle is actuated or if the engine is un-
der load.
– If the activation request for the function is not confirmed, and the engine has
been configured with engine shutdown, the engine is switched off.
Conditions for when automatic hydrocarbon evaporation activation is allowed are
specified by the fitter. Below are some examples of conditions:
• Gearbox in neutral position to prevent the vehicle from moving.
• There are no active bodywork systems or power take-offs.
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