Scania Cv Ab

Maria Södergren

Oskar Johansson

Fredrik Roos

Martin Evaldsson

Jörgen Hansson

Henrik Pettersson

A method for an economical cruise control and an economical cruise control which demands from a vehicle engine system a reference speed v, which may differ from a chosen set speed v. Adjustment of at least the set speed vis allowed when the reference speed vdiffers from the set speed v. 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.

Driver interaction pertaining to economical cruise control

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.

Method and module for controlling a vehicle's speed based on rules and/or costs

Described is a method for determining a reference value for a vehicle. The method includes: performing a number of simulation cycles Seach comprising simulation steps: making a first prediction of the vehicle's speed valong the determined horizon with a conventional cruise control; comparing, in a first comparison, the predicted vehicle speed vwith vand v, 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 vwith v, and vwhich 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 S; and controlling the vehicle according to the reference value.

Module and method pertaining to mode choice when determining reference values

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 Tthat retards the vehicle as compared with conventional cruise control, and a second prediction based on an engine torque Tthat 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.

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 vwhich may differ from a chosen set speed v. Adjustment of at least the set speed vis allowed if the reference speed vdiffers from the set speed v, which adjustment is based at least partly on a current speed vof 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 vis thus achieved.

Driver interaction pertaining to reference-speed-regulating cruise control

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.

Method and module for determining of at least one reference value

A system for handling errors in map data D. Information I related to map data Dis determined by a determination unit. An identification unit then identifies at least one error in the map data Don 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 D. A data providing unit can then at least partly disregard the map data Dincluding the error, when supplying map data D, so that the stored data D may instead be used in decision making. The risk of decisions being based on erroneous map data Dmay thus be minimized.

Handling of errors in map data

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.

Method and module for determining of at least one reference value for a vehicle control system

Described is a method for determining a reference value for a vehicle. The method includes: performing a number of simulation cycles Seach comprising simulation steps: making a first prediction of the vehicle's speed valong the determined horizon with a conventional cruise control; comparing, in a first comparison, the predicted vehicle speed vwith Vand V, 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 vwith v, and Vwhich 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 S; and controlling the vehicle according to the reference value.

Reference speed values for a vehicle's control system are determined by: determining, using map and location data, route segments, each with route characteristics; performing, simulation cycles, each comprising simulation steps of: predicting the speed when the set speed is imparted as the reference speed; comparing with first 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 is a value that depends on the result of said first comparison in the immediately preceding simulation cycle; comparing the second predicted vehicle speed with second lower and upper limit values, which delineate a range within which the speed is maintained, with an offset added if the vehicle is in a route segment with a steep hill; and determining the reference value based on the second comparison and/or the second predicted vehicle speed.

Method and module for determining of reference values for a vehicle control system

A method for determination of at least one reference value for controlling a vehicle's speed is described. The method may entail making a first prediction vand a second prediction vof a vehicle speed along a horizon, said first prediction based on an engine torque Twhich retards the vehicle as compared with a conventional cruise control, and said second prediction based on an engine torque Twhich accelerates the vehicle as compared with a conventional cruise control; comparing said respective first prediction vand second prediction vof the vehicle speed with a lower limit value vand/or an upper limit value vwhich delineate a range within which the vehicle's speed should be; and determining at least one reference value based on at least one of said respective comparisons and said first prediction vand second prediction vof the vehicle speed along the horizon.

A method and a system for determining a running resistance Ffor a vehicle. A model-based running resistance Fis estimated. Thereafter an energy change difference &#x394;Wbetween a model-based estimated energy change &#x394;Wand an actual energy change &#x394;Wis determined for the vehicle from a starting point to an end point of a distance S which is traveled by the vehicle. A braking force Fwhich is unknown to the model and which acts upon the vehicle over the distance S is also determined on the basis of the energy change difference &#x394;W. Thereafter the running resistance Fis determined to an adjusted value of the model-based estimate of the running resistance F, the adjustment being based on the braking force Fwhich is unknown to the model.

Determination of running resistance for a vehicle

A method for controlling a vehicle's speed by adopting a desired speed vfor the vehicle; determining a horizon for the intended itinerary made up of route segments, effecting the following during each of a number of simulation cycles (s) each comprising a number N of simulation steps conducted at a predetermined frequency f: first predicting the vehicle's speed valong the horizon with conventional cruise control when vis presented as reference speed, comparing the predicted vehicle speed vin a range vto v, making a second prediction of the vehicle's speed valong the horizon based on the vehicle's engine torque T; determining a reference value for how the vehicle's speed is to be influenced on the basis of at least one of the comparisons and the predicted vehicle speed v; controlling the vehicle by the reference value. A module for the foregoing controls a vehicle's speed.

Method and module for controlling a vehicle's speed

A system having a user interface which presents map data D. An analysis unit analyzes map data D, determining a quality Q for these map data Dwhich are to be presented. The determination is based on whether the respective map data Dare available and/or reliable. The quality Q is presented graphically by a presentation unit. The risk of wrong decisions being taken on the basis of deficient map data Dis reduced considerably, since the user can easily decide whether there are reliable map data or not.

Graphical user interface

A method for controlling a vehicle's speed includes adopting a desired speed vfor the vehicle; determining by means of map data and location data a horizon for the intended itinerary which is made up of route segments with at least one characteristic for each segment; effecting the following during each of a number of simulation cycles (s) each comprising a number N of simulation steps conducted at a predetermined frequency f: making a first prediction of the vehicle's speed valong the horizon with conventional cruise control when vis presented as reference speed, which prediction depends on the characteristics of said segment; comparing the predicted vehicle speed vwith vand v, which demarcate a range within which the vehicle's speed is intended to be; making a second prediction of the vehicle's speed valong the horizon when the vehicle's engine torque T is a value which depends on the result of said comparison in the latest preceding simulation cycle (s&#x2212;1); determining at least one reference value for how the vehicle's speed is to be influenced on the basis of at least one of said comparisons in that simulation cycle (s) and the predicted vehicle speed v; sending to a control system in the vehicle said at least one reference value with respect to which the vehicle is thereupon regulated. The invention comprises also a module for controlling a vehicle's speed.

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Segeltorp, Sweden

Maria Södergren