METHOD AND SYSTEM FOR CONTROL OF TEMPERATURE OF AN EXHAUST AFTERTREATMENT SYSTEM

摘要

A system for control of temperature for a vehicle exhaust treatment system comprising a first determination unit arranged for determination of a temperature for the exhaust treatment system, and a simulation unit arranged for simulation of a future velocity profile, based on information relating to a road section. A second determination unit arranged for determination, based on a future velocity profile, of whether a simulated active brake process due to an over-speed for the vehicle will occur within the road section. A utilization unit is arranged for utilization, if the at least one temperature for the exhaust treatment system is below a minimum temperature threshold value, and if the simulated active brake process is simulated to occur within the road section, of an engine fitted auxiliary brake, which is fitted in connection with an exhaust stream from an engine in the vehicle, where the utilization is initiated before over-speed occurs.

主权项

1. A method for control of at least one temperature Texhaust for an exhaust treatment system in a vehicle, said method comprising;
determining at least one temperature Texhaust for said exhaust treatment system; simulating at least one future velocity profile vsim for an actual vehicle speed vact within a road section ahead of said vehicle, wherein said simulation is based on information relating to said road section; determining, based on said at least one future velocity profile vsim, whether a simulated active brake process brakesim because of an over-speed for said vehicle will occur within said road section; and using, if said at least one temperature Texhaust for said exhaust treatment system is below a minimum temperature threshold value Tmin, and if said simulated active brake process brakesim is simulated to occur within said road section, at least one engine fitted auxiliary brake, fitted in connection with an exhaust stream from an engine in said vehicle, wherein said use of said at least one engine fitted auxiliary brake is initiated before said vehicle reaches a position where said over-speed occurs.