Abstract:
A system and a method for a vehicle platoon that comprises at least one lead vehicle and one additional vehicle, each of which has a positioning unit and a unit for wireless communication. The system comprises a profile unit configured to determine a profile for at least one vehicle in the vehicle platoon with the aid of positional data and map data for a road ahead, which profile contains at least one property of the road ahead. The system comprises also an analysis unit that is configured to determine at least one actual property of the road ahead, to determine correctional data β based on the at least one actual property of the road ahead and the at least one property of the profile whereby the actual property and the at least one property of the profile concern essentially the same property and to pass the correctional data β to at least one vehicle fk in the vehicle platoon.
Abstract:
A method in a steering fault detection system for detection of a steering fault of a vehicle, the vehicle comprises a active driver steering support (ADSS) system adapted to assist steering the vehicle at least in dependence of one environmental signal, e.g. a camera signal, and to generate a steering assist control signal to a steering servo system of the vehicle (step A), wherein said steering assist control signal includes one or many steering assist control values. The method comprises: B - applying said steering assist control signal to said steering fault detection system; C - analysing said steering assist control values in relation to predetermined ideal steering assist control values, and D - generating an indication signal in dependence of said analysis, wherein said indication signal includes steering fault information.
Abstract:
A system for regulation of vehicles in a vehicle train which are adapted to communicating via wireless communication. The system comprises a processor unit adapted to receiving wirelessly from vehicles in the train data which comprise vehicle parameters for the vehicles and identification data which indicate the vehicle or vehicles from which said parameters come, to estimating one or more states for at least one vehicle k i+1 in the train on the basis of at least a model of the vehicle and said parameters received, to calculating for said estimated states one or more check values which indicate how reliable the estimation of the state or states is, depending on the transmission of the wireless data signals, to determining a distance d between a vehicle k i behind and vehicle k i+1 in the train on the basis of said check value or values and generating a control signal which indicates said distance d, and to sending said control signal to a control unit of vehicle k i , which vehicle is then regulated so that the distance d i i+1 between the two vehicles and k i+1 substantially becomes d.
Abstract:
The invention relates to a system in the context of a vehicle train which comprises at least two vehicles adapted to communicating via wireless communication. The system comprises a processor unit adapted to receiving wirelessly from at least the more forward of the two vehicles data which comprise at least one vehicle parameter for the vehicle. The processor unit is further adapted to receiving data from a detector unit on board the rear vehicle, which detector unit is adapted to measuring a relative vehicle parameter between the forward vehicle and the rear vehicle. The processor unit is then adapted to estimating a vehicle state for the forward vehicle on the basis of at least a model of the vehicle and said vehicle parameters, and to generating a state signal which indicates said estimated vehicle state. The invention comprises also a method in the context of vehicle trains.
Abstract:
The present invention relates to a method for determining speed set-point values v ref for a vehicle's control systems. The method comprises the steps of: determining a horizon by means of position data and map data of an itinerary made up of route segments with at least one characteristic for each segment; calculating threshold values for said at least one characteristic of segments according to one or more vehicle-specific values, which threshold values serve as boundaries for assigning segments to various categories; comparing said at least one characteristic of each segment with the calculated threshold values and placing each segment within the horizon in a category according to the results of the comparisons; calculating set-point values for the vehicle's control systems across the horizon according to rules pertaining to the categories in which segments within the horizon are placed; and when any characteristic in segments within the horizon indicates a hindrance, the following steps are performed: - calculating the vehicle's retardation on the supposition that the brakes are not used according to said rules pertaining to the segment categories; - determining a start position within the horizon for commencement of retardation of the vehicle according to its calculated retardation in order to achieve a lowering of the set-point speed v ref to a maximum speed required by the hindrance at the location of the hindrance; adapting the speed set-point values v ref within the horizon according to said start position and retardation of the vehicle and regulating the vehicle's speed according to the speed set- values v ref . The invention comprises also a module adapted to determining set-point values for a control system in the vehicle.
Abstract:
A module for determining speed set-point values v ref for a vehicle's control systems, comprising an input unit adapted to input, e.g. by the vehicle's driver, of a reference speed v set which is the speed desired by the driver for the vehicle. The module comprises - a horizon unit adapted to 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 adapted to calculating v ref across the horizon according to rules pertaining to categories in which segments within the horizon are placed, so that v ref is within a range bounded by v min and v max , where v min ≤ v set ≤ v max . The processor unit is further adapted to 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 v ref .
Abstract:
A system and a method to organise a vehicle platoon. The system comprises a processor unit that is configured to determine a ratio bx for a vehicle f x that wishes to become a member of the vehicle platoon, which ratio describes the relationship between the maximum engine power of the vehicle f x and the mass of the vehicle, or the relationship between the maximum engine torque of the vehicle f x and the mass of the vehicle, to compare the ratio bx with at least one other ratio bk for a vehicle f k in the vehicle platoon, which ratio describes the relationship between the maximum engine power of the vehicle f k and the mass of the vehicle, or the relationship between the maximum engine torque of the vehicle f k and the mass of the vehicle, and to determine a location for the vehicle f x in the vehicle platoon based on the result of the comparison. The system is further configured to generate a location signal that indicates the location of the vehicle f x and to transmit the location signal to an indicator unit in the vehicle f x , whereby the location of the vehicle f x is designated for the driver of the vehicle f x .
Abstract:
A control unit and a method to control a vehicle f k in a vehicle platoon. The method comprises: receiving at least one vehicle parameter φ that describes a property of the vehicle f k-1 that lies immediately in front of the vehicle f k in the vehicle platoon; determining data β about the surroundings, which data describe a property of the surroundings of the vehicles; predicting a behaviour for the vehicle f k-1 in front, based on the vehicle parameter φ that describes a property of the vehicle f k-1 and the data β about the surroundings, and determining a driving strategy for the vehicle f k based on the predicted behaviour of the vehicle f k-1 in front; after which the vehicle f k is controlled according to the driving strategy.
Abstract:
A system (4) to control a vehicle platoon that comprises at least one lead vehicle and one additional vehicle, each of which has a positioning unit (1) and a unit (2) for wireless communication, and a method to control a vehicle platoon. The system and method comprise to: - determine a common position-based driving strategy adapted to be applied for all vehicles in the vehicle platoon along a road horizon for the road ahead of the vehicle platoon, wherein the driving strategy comprises a driving profile comprising target values b, and associated positions p,, and to - pass the driving strategy to all vehicles in the vehicle platoon, after which the vehicles in the vehicle platoon are control according to the driving strategy, wherein the said target values are applied for each one of the vehicles at each position associated with a target value.
Abstract:
The invention relates to a thermal electric generator system (TEG system) (1) for extracting electricity from a waste heat medium (2) in a waste heat line (3) in a vehicle, which system (1) comprises a TEG unit (4) comprising: one or more thermal electric generator layers (TEG layers) (6) adapted to converting thermal energy to electricity and situated directly against the waste heat line (3), and an energy storage module (5) adapted to storing thermal energy and situated upstream of the TEG layer directly against the waste heat line (3), whereby thermal energy from the waste heat medium (2) is stored in the energy storage module (5). The TEG system (1) further comprises a bypass unit (8) comprising a bypass line (9) connected to the waste heat line (3) via an adjustable valve device (10) so that all or parts of the waste heat medium (2) can be led past the TEG unit (4) in the bypass line (9); and a valve control unit adapted to adjusting the valve device (10) when predetermined conditions are fulfilled, which valve control unit is adapted to adjusting the valve device (10) when vehicle signals such as, for example, brake signals or acceleration control signals indicate that the vehicle is being braked or accelerated.