Abstract: A method for running a vehicle (100) that includes a combustion engine (101) which can selectively be connected to a driveshaft (104, 105). When the vehicle (100) is in motion and is approaching a downgrade, determining whether the engine (101) can be disconnected from the driveshaft (104, 105) for at least a first period of time (T1), and disconnecting the driveshaft (104, 105) for at least the first period of time (T1); and the engine (101) also is switched off for the first period (T1). A system that performs the method and a vehicle that performs it are disclosed.

Abstract: A method for an economical cruise control and an economical cruise control which demands from a vehicle engine system a reference speed vref, which may differ from a chosen set speed vset. Adjustment of at least the set speed vset is allowed when the reference speed vref differs from the set speed vset. The adjustment is based at least partly on input from a user of the economical cruise control. A user of the economical cruise control is thus provided with an increased feeling of control over the vehicle's speed.

Abstract: A method and a system for controlling a cruise control and a transmission in a vehicle over the course of a road section, wherein prior to the road section, the vehicle has applied coasting and utilizes the cruise control. A reference speed vref utilized in the cruise control during the coasting is lowered to a lowest permitted speed vmin defined for the road section if the lowering is deemed applicable. A comparison of a drive force Fdd requested from an engine system in the vehicle with a threshold value Flim for the drive force is also carried out. The coasting is then suspended if the requested drive force Fdd exceeds the threshold value Flim for the drive force.

Abstract: A method and a system for choosing a transmission mode in a vehicle over the course of a road section, wherein the vehicle has applied coasting prior to this road section and wherein a highest permitted speed vmax is defined for the road section, below which an actual speed for the vehicle should be kept. A simulation of a future speed profile vsim_Gear for a possible gear position for a gearbox in the vehicle is conducted on the basis of a road slope obtained from map data in combination with vehicle positioning information and wherein the simulation simulates, when the road section lies ahead of the vehicle, an actual speed for the vehicle over the course of the road section. Next, an evaluation is carried out of whether a suspension of the coasting in favor of the possible gear position is recommended, wherein the possible gear position is deemed recommendable if a highest value vsim_Gear_max for the future speed profile exceeds the highest permitted speed vmax.

Abstract: A method for controlling a vehicle's speed, including: acquiring a set speed; determining, using using map and location data, a horizon made of route segments, each with a route characteristic; performing simulation cycles, each including: predicting the speed according to a conventional cruise control, which first prediction depends on the route characteristic; comparing the first predicted speed with lower and upper limit values, which define an engine torque for use in the next simulation cycle; making a second prediction of the speed when the engine torque depends on the comparison in the immediately preceding simulation cycle; comparing, as a second comparison, the second predicted speed with second lower and upper limit values, which delineate a speed range within which the speed is maintained; determining, based on the second comparison and/or the second predicted speed in this simulation cycle, a reference value for use by a vehicle control system.

Abstract: A system for governing a reference speed vref_dhsc for a downhill speed control system in a vehicle in connection with a downhill gradient. A simulation unit simulates at least one future speed profile vsim for an actual vehicle speed over a section of road in front of the vehicle, based on topographic information. An establishing unit establishes whether the reference speed vref_dhsc is to be allocated an increased reference speed vref_dhsc_schwung. This establishing is based on a comparison of the simulated future speed profile vsim with a permitted magnitude of the increased reference speed vref_dhsc_schwung and/or with an infringement speed vsl. An allocation unit allocates the value of the increased reference speed vref_dhsc_schwung to the reference speed vref_dhsc if this has been established.

Abstract: A method for running of a vehicle having a combustion engine which can selectively be connected to a driveshaft (104, 105) for propulsion of the vehicle, the vehicle can be run in a first mode (M1) with the engine connected to the driveshaft (104, 105) and in which fuel supply to the engine is substantially shut off, in a second mode (M2) with the engine disconnected from the driveshaft (104, 105) and a third mode like the first mode, but with the fuel supply not cut off. On a downgrade, determining whether running in the first mode (M1) will result in a speed increase, and then running in the second mode (M2) if running it in the first mode (M1) would cause a speed increase.

Abstract: Described is a method for determining a reference value for a vehicle. The method includes: performing a number of simulation cycles Sj each comprising simulation steps: making a first prediction of the vehicle's speed vpred_cc along the determined horizon with a conventional cruise control; comparing, in a first comparison, the predicted vehicle speed vpred_cc with vlim1 and vlim2, which define a motor torque used in a subsequent simulation cycle; making a second prediction of the speed when the engine torque is a value that depends on the result of said comparison in the latest preceding simulation cycle; comparing, in a second comparison, the predicted vehicle speed vpred_Tnew with vmin, and vmax1 which demarcate a range within which the speed is maintained; determining the reference value based on the second comparison and/or the second predicted speed in that simulation cycle Sj; and controlling the vehicle according to the reference value.

Abstract: A reference value for controlling a vehicle's speed is obtained by: receiving a choice from two selectable driving modes, each driving mode having a unique set of settings that influence the calculation of the reference value; making a first prediction, based on an engine torque Tret that retards the vehicle as compared with conventional cruise control, and a second prediction based on an engine torque Tacc that accelerates the vehicle as compared with conventional cruise control; comparing the first and second predictions with a lower limit value and/or an upper limit value, which delineate a speed range within which the speed should be; and determining the reference value based on the mode choice and on at least one of the comparisons and said first prediction and second prediction of the speed along the horizon, such that the reference value is within the speed range.

Abstract: A method and a system for choosing a transmission mode in a vehicle over the course of a road section, in which a simulation of at least one future speed profile vsim for the road section ahead of the vehicle is conducted on the basis of a road slope for the road section. A time period Tappl is determined on the basis of the at least one simulated future speed profile vsim, which ensures that a lower transmission mode is chosen before a lowest permitted speed vmin defined for the road section and/or a set speed vset for a speed control is reached. During the determined time period Tappl, the transmission mode which is utilized when the simulation is made is applicable for the vehicle. After this, it is evaluated whether a lower transmission mode than the currently used transmission mode shall be chosen. A lower transmission mode shall be chosen if the time period Tappl for which the current transmission mode is applicable is shorter than a first threshold period Tlim.

Abstract: A method for operation of a reference-speed-regulating cruise control and a reference-speed-regulating cruise control which demands from a vehicle engine system a reference speed vref which may differ from a chosen set speed vset. Adjustment of at least the set speed vset is allowed if the reference speed vref differs from the set speed vset, which adjustment is based at least partly on a current speed vpres of the vehicle and on input from a user of the reference-speed-regulating cruise control. Quick and simple user-controlled adjustment of the set speed vset is thus achieved.

Abstract: At least one reference value is determined for controlling a vehicle's speed by a method that includes predicting, in a first prediction, a first speed based an engine torque that retards the vehicle as compared with a conventional cruise control along a horizon, and, in a second prediction, a second speed based on an engine torque that accelerates the vehicle as compared with the conventional cruise control; comparing the first and second speeds with a lower limit value and/or an upper limit value which delineate a speed range within which speed is maintained, with an offset added to said lower and/or upper limit values if the vehicle is in a route segment that includes a steep hill; and determining the at least one reference value based on the respective comparisons and the first and second predicted speeds.

Abstract: A method and a system for choosing a transmission mode in a vehicle over the course of a road section, wherein the vehicle has applied coasting prior to this road section and wherein a highest permitted speed vmax is defined for the road section, below which an actual speed for the vehicle should be kept. A simulation of a future speed profile vsim—Gear for a possible gear position for a gearbox in the vehicle is conducted on the basis of a road slope obtained from map data in combination with vehicle positioning information and wherein the simulation simulates, when the road section lies ahead of the vehicle, an actual speed for the vehicle over the course of the road section. Next, an evaluation is carried out of whether a suspension of the coasting in favor of the possible gear position is recommended, wherein the possible gear position is deemed recommendable if a highest value vsim—Gear—max for the future speed profile exceeds the highest permitted speed vmax.

Abstract: A method for running a vehicle (100) that includes a combustion engine (101) which can selectively be connected to a driveshaft (104, 105) to deliver driving force to the driveshaft (104, 105) for propulsion of the vehicle (100). When the vehicle (100) is in motion, determining whether the vehicle (100) is approaching a downgrade and, when it is approaching the downgrade, disconnecting the engine (101) from the driveshaft (104, 105) before the vehicle (100) reaches the downgrade. Also a system and a vehicle are disclosed.

Abstract: A system for handling errors in map data Dmap. Information I related to map data Dmap is determined by a determination unit. An identification unit then identifies at least one error in the map data Dmap on the basis of the information I determined. Thereafter a storage unit stores data D related to the at least one error identified in map data Dmap. A data providing unit can then at least partly disregard the map data Dmap including the error, when supplying map data Dmap, so that the stored data D may instead be used in decision making. The risk of decisions being based on erroneous map data Dmap may thus be minimized.

Abstract: A method for determining a reference value for controlling a vehicle's speed by a vehicle control system is described. The method includes: making a first prediction and a second prediction of the speed along a horizon, the first prediction based on an engine torque that retards the vehicle as compared with a conventional cruise control, and the second prediction based on an engine torque that accelerates the vehicle as compared with the conventional cruise control; comparing the first prediction and second prediction, respectively, with a lower limit value and/or an upper limit value, which delineate a speed range within which the speed is to be maintained; and determining the reference value based on at least one of the respective comparisons and the first prediction and second prediction so that the set speed is within the speed range bounded by the lower and upper limit values.

Abstract: A method and a system for choosing a transmission mode in a vehicle over the course of a road section, in which a simulation of at least one future speed profile vsim for the road section ahead of the vehicle is conducted on the basis of a road slope for the road section. A time period Tappl is determined on the basis of the at least one simulated future speed profile vsim, which ensures that a lower transmission mode is chosen before a lowest permitted speed vmin defined for the road section and/or a set speed vset for a speed control is reached. During the determined time period Tappl, the transmission mode which is utilized when the simulation is made is applicable for the vehicle. After this, it is evaluated whether a lower transmission mode than the currently used transmission mode shall be chosen. A lower transmission mode shall be chosen if the time period Tappl for which the current transmission mode is applicable is shorter than a first threshold period Tlim.

Abstract: A method and a system for controlling a cruise control and a transmission in a vehicle over the course of a road section, wherein prior to the road section, the vehicle has applied coasting and utilizes the cruise control. A reference speed vref utilized in the cruise control during the coasting is lowered to a lowest permitted speed vmin defined for the road section if the lowering is deemed applicable. A comparison of a drive force Fdd requested from an engine system in the vehicle with a threshold value Flim for the drive force is also carried out. The coasting is then suspended if the requested drive force Fdd exceeds the threshold value Flim for the drive force.

Abstract: Described is a method for determining a reference value for a vehicle. The method includes: performing a number of simulation cycles Sj each comprising simulation steps: making a first prediction of the vehicle's speed vpred—cc along the determined horizon with a conventional cruise control; comparing, in a first comparison, the predicted vehicle speed vpred—cc with Vlim1 and Vlim2, which define a motor torque used in a subsequent simulation cycle; making a second prediction of the speed when the engine torque is a value that depends on the result of said comparison in the latest preceding simulation cycle; comparing, in a second comparison, the predicted vehicle speed vpred—Tnew with vmin, and Vmax1 which demarcate a range within which the speed is maintained; determining the reference value based on the second comparison and/or the second predicted speed in that simulation cycle Sj; and controlling the vehicle according to the reference value.

Abstract: A module for determining speed set-point values vref for a vehicle's control systems includes an input unit configured for input, e.g. by the vehicle's driver, of a reference speed vset which is the speed desired by the driver for the vehicle. A horizon unit is configured for determining a horizon by means of received position data and map data of an itinerary made up of route segments with at least one characteristic for each segment. A processor unit is configured for calculating vref across the horizon according to rules pertaining to categories in which segments within the horizon are placed, so that vref is within a range bounded by vmin, and vmax, where vmin?vset?vmax. The processor unit is further configured for determining a control signal with control parameters for the vehicle's automatic gear change control unit, based on one or more vehicle-specific values and a calculated speed set-point value vref.