Scania Cv Ab

Björn Johansson

Zoltan Kardos

Erik Höckerdal

Ola Blom

Fredrik Roos

Anders Larsson

Magnus Pettersson

Oscar Flärdh

Björn Westerberg

Per Sahlholm

Henrik Svärd

Frank Mohr

Carl Svärd

Erik Holma

Thomas TIMRÉN

Carl SVÄRD

Henrik SVÄRD

A method for determining a reference control profile for a vehicle, including determining (A) a plurality of control profiles for the vehicle () based on topographic information for one and the same future route segment and selecting (A) one of the plurality of control profiles as a reference control profile, the selection (A) being based on a tradeoff criterion considering resource consumption and drivability of the plurality of control profiles. The disclosure also relates to a control arrangement () for determining a reference control profile for a vehicle () and a vehicle comprising the control arrangement ().

Method and a control arrangement for determining a control profile for a vehicle

A method (and a system that executes the method) for control of at least one sectional ammonia coverage degree profile NHfor at least one SCR catalyst included in an exhaust gas treatment system, the method includes determining at least one ammonia sectional coverage degree profile NHfor the at least one SCR catalyst based on a flow F, a temperature T and a composition C of the exhaust stream upstream of the at least one SCR catalyst. The method also includes comparing the at least one sectional ammonia coverage NHwith at least one sectional reference profile for an ammonia coverage degree NHfor the at least one SCR catalyst. The method further includes controlling, based on the comparison, at least one of a concentration of nitrogen oxides Cin the exhaust stream to be output from the combustion engine and a dosage of a reductant including ammonia NH3 to be injected into the exhaust stream upstream of the at least one SCR catalyst.

Method and system for controlling an ammonia coverage degree profile

The invention relates to a method for controlling a waste heat recovery system associated with a combustion engine of a vehicle, the waste heat recovery system comprising a working fluid circuit; at least one evaporator; an expander; a condenser; a reservoir for a working fluid and a pump arranged to pump the working fluid through the circuit, wherein the at least one evaporator is arranged for heat exchange between the working fluid and a heat source, and wherein the waste heat recovery system further comprises a cooling circuit arranged in connection to the condenser. The method comprises the steps of: predicting a shutdown of a combustion engine associated with the system; determining if a predetermined requirement is fulfilled; and if so reducing the temperature in the waste heat recovery system prior to combustion engine shutdown.

Method for controlling a waste heat recovery system and such a waste heat recovery system

The invention relates to a method for controlling the temperature of a waste heat recovery system associated with a combustion engine, the waste heat recovery system comprising a working fluid circuit; at least one evaporator; an expander; a condenser and a pump arranged to pump the working fluid through the circuit, wherein the at least one evaporator is arranged for heat exchange between the working fluid and a heat source associated with the combustion engine, wherein the condenser of the waste heat recovery system is connected to a cooling system. The method comprises the steps of: determining if a combustion engine associated with the waste heat recovery system is about to be shut down; and controlling the temperature in the waste heat recovery system based on whether the combustion engine is about to be shut down or not.

Method for controlling the temperature of a waste heat recovery system and such a waste heat recovery system

A method and a system for detection of torque deviations of an engine () in a vehicle (). A measurement () is made of actual measured values Drelated to a behavior of at least one parameter which is related to an actual torque Mdelivered by the engine (). This actual torque Mis delivered here by the engine () in consequence of a torque Mdemanded from the engine (). A comparison () is then made of the actual measured values Dwhich are related to the behavior of the at least one parameter with previously determined measured values Dof correspondingly at least one respective parameter related to the actual torque M. The previously determined measured values Dwill here have been determined during normal operation of the vehicle (). Detection is then made of whether the actual measured actual torque Mdeviates from the demanded torque M. The detection is based here on the comparison of the actual measured values Dwith the previously determined measured values D.

Method and system for detection of torque deviations of an engine in a vehicle

The present invention relates to a method and a system for adaptation of a vehicle's performance. This system comprises a receiving device arranged to receive a request that a driver of the vehicle wishes to use a temporary performance mode. The system also comprises a first initiation device arranged to initiate a use of a preparation mode based on the driver's request, where the vehicle, during such preparation mode, prepares the vehicle to use an increased fraction of the power, generated by the engine in the vehicle, for the propulsion of the vehicle. The system also comprises a second initiation device arranged to initiate a use of the temporary performance mode, wherein such temporary performance mode uses the increased fraction of the power generated, released by the preparation mode, to provide a temporary performance boost for at least one feature relating to the propulsion of the vehicle.

Method and system for adapting performance

A method to monitor an operating characteristic in a combustion engine: creating a monitoring matrix divided into a number of sections for storage of information, wherein each section is associated with specific intervals of engine speed &#x3c9; and torque requested from the engine T. When the engine is used during an operational time window with a pre-determined duration, measuring or estimating an operating characteristic and associating the characteristic with the monitoring matrix's respective section, associated with the current engine speed and the torque requested. For each section in the monitoring matrix, calculating at least one statistical parameter describing the operating characteristic associated with this section during the current operational time window; storing the statistical parameter(s) in the respective section. At the end of the operational time window, storing information in the monitoring matrix in an individual storage matrix associated with the operational time window, wherein the monitoring matrix is emptied of information.

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Älvsjö, Sweden

Björn Johansson