XC70 AWD L6-3.2L VIN 98 B6324S (2009)
Function (Continued)
Controlling the adaptive cruise control
See Design and Function, Forward Sensing Module (FSM).
City Safety (only XC60)
City Safety is a function that helps the driver in case of high collision risk at speeds below 30 km/h, by preventing or minimizing the effects of collisions
by reducing the speed. The Engine control module (ECM) can, on request, perform torque limitation.
For a further information about the function, see Design and Function, Closing velocity module (CVM).
Engine Drag Control (EDC) (only XC60)
Engine Drag Control (EDC) is a function that is part of the DSTC function. The function ensures that the vehicle speed is not greater than the speed of
the driven wheels. i.e. if the vehicle loses traction on the surface. The Engine control module (ECM) can increase the wheel torque on request so that the
vehicle regains traction.
For a further information about the function, see Design and Function, Brake control module (BCM).
Fuel trim
Overview
Fuel trim reduces exhaust emissions. Fuel trim reduces nitrous oxides (NOx), carbon monoxide (CO) and hydrocarbon (HC) emissions.
Theoretically, if the correct amount of oxygen is added during combustion, fuel can be converted to water (H2O) and carbon dioxide (CO2). Emissions
would then be completely safe.
In practice considerable amounts of hydro-carbons (HC) and varying amounts of carbon monoxide (CO) and carbon dioxide (CO2) remain.
Due to the high temperature and pressure, nitrous oxides such as NO and NO2 are also formed. The common designation for these gases is nitrous
oxides NOx.
