EP2670643A1 - Method for determination of a braking location for regenerative braking of a vehicle, a device, a brake system and a vehicle - Google Patents
Method for determination of a braking location for regenerative braking of a vehicle, a device, a brake system and a vehicleInfo
- Publication number
- EP2670643A1 EP2670643A1 EP12742293.9A EP12742293A EP2670643A1 EP 2670643 A1 EP2670643 A1 EP 2670643A1 EP 12742293 A EP12742293 A EP 12742293A EP 2670643 A1 EP2670643 A1 EP 2670643A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- braking
- vehicle
- location
- distance
- time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 239000003981 vehicle Substances 0.000 claims description 133
- 238000004364 calculation method Methods 0.000 claims description 11
- 230000036962 time dependent Effects 0.000 claims description 10
- 230000036961 partial effect Effects 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 4
- 230000003993 interaction Effects 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000000875 corresponding effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/10—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels by utilising wheel movement for accumulating energy, e.g. driving air compressors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
- B60T7/22—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger initiated by contact of vehicle, e.g. bumper, with an external object, e.g. another vehicle, or by means of contactless obstacle detectors mounted on the vehicle
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- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
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- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
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- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/18—Conjoint control of vehicle sub-units of different type or different function including control of braking systems
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- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/12—Controlling the power contribution of each of the prime movers to meet required power demand using control strategies taking into account route information
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- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/13—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
- B60W20/14—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion in conjunction with braking regeneration
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- B60W30/18—Propelling the vehicle
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- B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/46—Series type
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- B60W2050/0026—Lookup tables or parameter maps
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- B60W2530/16—Driving resistance
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- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
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- B60W2555/00—Input parameters relating to exterior conditions, not covered by groups B60W2552/00, B60W2554/00
- B60W2555/60—Traffic rules, e.g. speed limits or right of way
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
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- B60W2556/00—Input parameters relating to data
- B60W2556/45—External transmission of data to or from the vehicle
- B60W2556/50—External transmission of data to or from the vehicle of positioning data, e.g. GPS [Global Positioning System] data
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2720/00—Output or target parameters relating to overall vehicle dynamics
- B60W2720/10—Longitudinal speed
- B60W2720/106—Longitudinal acceleration
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- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2300/00—Purposes or special features of road vehicle drive control systems
- B60Y2300/89—Repartition of braking force, e.g. friction braking versus regenerative braking
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
Definitions
- the present invention relates to a method for determination of a braking location for regenerative braking of a vehicle to a known stop location, said regenerative braking being effected with a braking force which comprises a regenerative force component F e created by a regenerative brake system of the vehicle.
- the present invention relates also to a device for determination of the braking location, a brake system for regenerative braking and a vehicle which is provided with either the device or the brake system.
- Vehicles with means for regenerative braking are adapted to recovering energy during regenerative braking with F e .
- This entails the vehicle's kinetic energy being used to charge an energy store of the veh icle instead of going to waste in the form of heat in a brake device of the veh icle.
- the stored kinetic energy is intended to be reused by discharge from the energy store during subsequent acceleration of the vehicle.
- the energy consumption of vehicles which use regenerative braking is thus reduced as compared with those in which the kinetic energy arising during braking goes to waste.
- the means for regenerative braking converts for example the kinetic energy to electrical energy, hydrau lic energy, pneumatic energy etc. , and the energy store is adapted to storing corresponding converted energy.
- Regenerative braking is for example used in vehicles such as cars, trains, trucks etc. wh ich have an electric motor adapted to using electrical energy during acceleration and to regeneratively reusing the vehicle's kinetic energy which arises during its braking .
- the electric motor thus has the function both of an electric motor and an electrical generator.
- Hybrid vehicles with two or more prime movers powered by different energy sources also usually have means for regenerative braking , e.g . one or more electric motors.
- the vehicle is also provided with non-regenerative means for braking it, e.g . wheel brakes etc.
- a brake system of the vehicle which comprises the means for regenerative braking and the means for non-regenerative braking is adapted to providing a combined braking force.
- a problem with vehicles according to the state of the art is that a driver of the vehicle without assistance has difficulty in braking it in an optimum way with regard to recovering kinetic energy and driving on time. If the braking distance for braking the vehicle to the stop location is shorter than the means for regenerative braking is able to provide, energy will go to waste in the means for non-regenerative braking . The wear on the means for non-regenerative braking will also increase as compared with if the braking is on ly effected by the means for regenerative braking . Conversely, if the braking distance for braking the vehicle to the stop location is longer than the means for regenerative braking needs for regenerative braking , its braking will take more time than necessary.
- GB2460528 A refers to a system for regenerative braking of an electric vehicle.
- the regenerative braking begins when the vehicle passes over an electrical coil.
- a problem with this system is that the braking takes place between predetermined braking and stop locations.
- US201 0/0042304 A1 refers to a method for controlling the power flow in a vehicle on the basis of the probability of braking when the vehicle is in motion .
- the object of the present invention is to propose a method for solving the problems of the state of the art.
- a first object of the invention is a method for helping the driver in braking the vehicle by regenerative braking .
- a second object of the invention is to help the driver so that the braking of a vehicle takes place in an optimum way with regard to recovering kinetic energy, to driving on time and to comfort.
- the invention relates also to a device according to claim 1 3 for applying the method , a brake system accord ing to claim 14 and a vehicle according to claim 1 5.
- the determination of the braking distance between the vehicle's momentary location and the stop location is for example based on their respective coordinates and a specific length scale between the coordinates.
- the information about the vehicle's momentary location is conveyed by a position ing system.
- the vehicle's stop location arises from stop locations along the vehicle's route which are each predetermined or conveyed during the veh icle's journey.
- the vehicle's momentary speed is provided by a speedometer of the vehicle.
- the veh icle's braking distance depends on the momentary speed and F e .
- the determination of the length of said braking d istance is mainly based on the magnitude of F e and the veh icle's momentary speed .
- the braking distance is thereby optimised with regard to recovery of kinetic energy, with less significance attached to other parameters which affect the braking .
- the method comprises setting said braking locations so that the braking distance for regenerative braking is minimised .
- the braking location is thus indicated so that as short a braking distance as possible is achieved , which is advantageous with regard to the vehicle's progress along its itinerary.
- the determination of said braking location is done dynamically by setting the braking distance on the basis of the veh icle's momentary speed .
- This dynamic setting means that the braking location is determined continuously when the vehicle is in motion . The braking location is therefore not a fixed point along the vehicle's route.
- the method comprises increasing the braking distance by a distance representing a reaction distance which the veh icle travels during a reaction time for effecting braking to the braking location.
- the method comprises:
- the regenerative braking commences upon receipt of the signal that said braking location has been reached . This results in automatic braking of the veh icle as soon as the location for regenerative braking to the stop location is reached .
- the driver has the alternatives of rejecting or confirming the thus available automatic braking .
- the braking is effected on the basis of a further force component F r created by interaction between the surroundings and the vehicle whereby the determination of the braking distance is also based on F r .
- F r depends on interaction between the surround ings and the vehicle, e.g . braking force from road gradient, rolling resistance, air resistance, power train losses etc.
- the braking distance When braking uphill in the vehicle's direction of movement to the stop location the braking distance will be shorter than where there is no gradient. Conversely, when braking downhill in the vehicle's direction of movement to the stop location the braking distance will be longer than where there is no grad ient.
- the braking distance may thus be lengthened or shortened in consideration of F r .
- the method comprises determination of F r with respect to time, F r (t), so the determination of the braking distance is based on F r (t).
- the method comprises determination of F e with respect to time, F e (t), so the determination of the braking distance is based on F e (t).
- F e (t) depends on characteristics of the regenerative means. For example, the regenerative means results in F e being different at different speeds of the vehicle, so the determination of F e (t) depends on the vehicle's momentary speed .
- the method comprises setting a number of stop locations which are predetermined along a route for the veh icle.
- stop locations are stopping places for the vehicle, e.g . bus stops, unloading places etc.
- the stop locations comprise stopping places along a route for the veh icle, and the method comprises their activation when the veh icle is in motion .
- the stop locations are activated by a passenger on board the vehicle or by a signal from a person at the stop location, or information is received about traffic lights, compulsory stops, etc.
- the vehicle's momentary speed is determined by a GPS receiver. According to an embodiment of the invention, the vehicle's momentary speed is determined by information from location markers along its itinerary or dead reckoning from either a starting location or a location marker for its progress along the itinerary.
- determination of the braking distance for said regenerative braking of the vehicle to said stop locations is based on a specific braking force. This makes it possible to brake the veh icle in such a way as to achieve desired comfort.
- the determination of the braking distance is based on a calcu lation process and/or tabulated values.
- the tabulated values are predetermined on the basis of a number of different momentary speeds of the veh icle and F e , preferably also on the basis of F r .
- the determination of the braking distance is based on an iterative calculation process comprising the following steps:
- t n denotes the current period of time
- t n-1 any applicable preced ing period of time during which the information about s(t n ) is saved
- s(t n- 1 ) is a time-dependent distance component
- v(t n- 1 ) a time-dependent speed component
- m the vehicle's weight
- F e (t n ) a time-dependent of F e
- F r (t n ) a time- dependent of F r
- the braking distance is determined by the iterative method steps and is then compared with the distance between the vehicle's momentary location and the stop location. The number of iterations depends on T and the magnitude of the vehicle's momentary speed .
- the method comprises memorisation of stop locations along a route, for use during a su bsequent journey along the route.
- the memorisation is for example done by stop locations being saved during journeys along a route, for use during subsequent journeys along it.
- the stop locations comprise information about traffic lights, compulsory stops, etc. or information from an adaptive cru ise control .
- the determination of the braking distance depends also on rolling resistance, kinetic energy, weight, expected road gradients, etc.
- Figure 1 depicts a power train for a vehicle according to an embodiment of the invention.
- Figure 2 is a flowchart of a method for activation of regenerative braking of a vehicle accord ing to the invention.
- Figures 3a and 3b are each a flowchart of a method for determining the braking distance for regenerative braking of a vehicle according to an embodiment of the invention .
- Figure 1 depicts a power train for a veh icle 1 which interacts with the method accord ing to the invention.
- the vehicle 1 comprises a first prime mover 3 and a second prime mover 5 which are preferably powered by d ifferent energy sources.
- the first prime mover 3 is a combustion engine powered by, for example, petrol or d iesel fuel
- the second prime mover is an electric motor 5.
- the vehicle 1 is provided with a first energy store 7, a second energy store 9 and a generator 1 1 .
- the first energy store 7 is adapted to su pplying energy to the first prime mover 3 and is for example a fuel tan k.
- the first prime mover 3 is connected to the generator 1 1 , which generates electricity and uses it to charge the second energy store 9, which is for example an electrical battery.
- the case here described is that of a series hybrid but the invention may also be implemented with a parallel hybrid or complex hybrid .
- the vehicle 1 is provided with a regenerative means 20 for braking of the vehicle.
- the regenerative means is the same as the second prime mover 5.
- the regenerative means is adapted to braking the vehicle with a regenerative force component F e , whi le energy is converted to a form appropriate to charging the second energy store 9.
- the regenerative means 20 is preferably an electric motor wh ich serves as a prime mover when the vehicle 1 is accelerated and as a generator when the veh icle is braked regeneratively.
- the vehicle 1 comprises also one or more non-regenerative means 22 for braking the veh icle, comprising a brake means which exerts a braking action on the vehicle while at the same time evolving heat.
- the non- regenerative means 22 for braking the vehicle 1 comprise wheel brakes of the vehicle.
- the vehicle is adapted to being braked both by the regenerative means 20 and by the non-regenerative means 22.
- the vehicle is thus adapted to being provided with sufficient braking force for the braking irrespective of whether or not the regenerative means 20 is able to provide it.
- the vehicle 1 has also a brake system 30 which comprises a device 40 for determining a braking location for regenerative braking of the vehicle.
- the device comprises calculation means 42, e.g . a logic unit, a computer processor etc. , adapted to receiving information for the determination of the braking location and to doing the determination of the braking location.
- the brake system comprises for example various types of known brake systems which may be provided with antispin , ABS etc.
- the device 40 comprises indicating means 44 adapted to provid ing a signal that the braking location for regenerative braking of the vehicle 1 has been reached .
- the device 40 is adapted to providing a signal to the regenerative means 20 to start regenerative braking of the vehicle with F e .
- Figure 2 is a flowchart of a method for activation of regenerative braking of a vehicle 1 accord ing to the invention.
- the method is adapted to being applied regu larly, e.g . ten times per second .
- the method beg ins with a step 210 in which information is received about a momentary speed and location of the veh icle, and a stop location to which it is desired to be braked . Th is is followed at a step 220 by determination of the distance between the momentary location and the stop location.
- the momentary location of the vehicle 1 is preferably received from a position ing system, e.g . a GPS receiver.
- the vehicle's momentary speed is received from a speedometer fitted permanently to the vehicle.
- the stop location for the veh icle 1 is determined by predetermined stopping points along the route, e.g . stopping places, unloading places, stop signs etc.
- the stop location for the vehicle is determined by being activated when the vehicle is in motion , e.g . by a passenger operating a stop signal or receipt of information about traffic lights, compulsory stops, etc.
- the information about stop locations for the vehicle is provided by a traffic flow system whereby stop locations are continuously determined along the itinerary.
- the braking d istance for regenerative braking to the stop location is determined on the basis of the veh icle's momentary speed , F e (t n ), F r (t n ) and the vehicle's weight m.
- the braking distance is increased by a distance which represents how far the vehicle will travel during a characteristic reaction time before the driver commences the regenerative braking .
- the determination of the braking distance between the momentary location and the stop location, and the determination of the braking distance, are followed by a step 250 of investigating whether the vehicle is within the braking distance for its regenerative braking .
- method steps 210 to 240 described above are repeated .
- the method is repeated continuously during operation of the veh icle until it is within the braking distance for regenerative braking .
- a signal is generated at a step 260 for the driver to initiate its regenerative braking to the stop location. After generating the signal, the method starts again from the beginning .
- the signal causes the brake system 30 to initiate the veh icle's regenerative braking .
- the vehicle's braking thus takes place automatically.
- the braking distance is determined by iterative calcu lation according to either of Figures 3a and 3b.
- the determination is based on tabulated values which are determined on the basis of a number of different momentary speeds of the veh icle and F e , preferably also on the basis of F r .
- the tabulated values are for example stored in a database, making it possible to determine the braking d istance quickly. Using tabulated values reduces the processing load as compared with determination by iterative calcu lation .
- Figures 3a and 3b each depict a flowchart of a method for determination of the braking distance for regenerative braking of a vehicle according to an embodiment of the invention.
- a counter n is set to zero and a time parameter t n is set to zero upon receipt of information about the momentary speed .
- a step length T is set to a specific value.
- the step length is used to increment t n during the determination of the braking distance.
- a small step length results in accurate determination at the cost of many iteration steps.
- a large step length involves a smaller number of iterations compared with using a small step length , but at the cost of less accuracy of determination of the braking distance.
- the step length has therefore to be set according to how quickly the calculation means 42 is able to perform iteration steps.
- a determination of the time dependent of F e viz. F e (t n )
- F e (t n ) depends mainly on the vehicle's momentary speed .
- a determination of a partial distance s(t n ) is done for each period of time from t n to t n + T.
- a step 340 the determination of s(t) is followed by initiating a subsequent period of time by incrementing n by 1 and setting t n to t n + T.
- step 360 there is investigation whether v(t n ) for the subsequent period of time exceeds a specific value. If it does, the method is repeated from step 320 on the basis of v(t n ) for that period .
- v(t n ) for the su bsequent period of time is equal to or below a specific value
- s(t n ) is summated for that period , and the braking distance is set to the aggregate of s(t n ) as a step 370. Thereafter the iterative calculation method is repeated .
- step 322 determination of the time dependent of F r , viz. F r (t n ).
- the determination of F r (t n ) is based on interaction between the surroundings and the vehicle. For example, F r (t n ) depends on conditions in the surround ings, e.g . road gradient, bend radius, rolling resistance, air resistance and the veh icle's momentary speed .
- the calculation method for the regenerative braking is based on the physical relationship
- Resolving the above relationsh ip entails discretising the equations, e.g . by using the Euler method backwards, resu lting in the expression according to claim 12 steps b) and d) .
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Human Computer Interaction (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1150074A SE535591C2 (en) | 2011-02-03 | 2011-02-03 | Method for determining a braking position for a regenerative braking of a vehicle, device, braking system and vehicle |
PCT/SE2012/050091 WO2012105896A1 (en) | 2011-02-03 | 2012-01-31 | Method for determination of a braking location for regenerative braking of a vehicle, a device, a brake system and a vehicle |
Publications (2)
Publication Number | Publication Date |
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EP2670643A1 true EP2670643A1 (en) | 2013-12-11 |
EP2670643A4 EP2670643A4 (en) | 2018-01-17 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP12742293.9A Withdrawn EP2670643A4 (en) | 2011-02-03 | 2012-01-31 | Method for determination of a braking location for regenerative braking of a vehicle, a device, a brake system and a vehicle |
Country Status (3)
Country | Link |
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EP (1) | EP2670643A4 (en) |
SE (1) | SE535591C2 (en) |
WO (1) | WO2012105896A1 (en) |
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WO2013191621A1 (en) * | 2012-06-19 | 2013-12-27 | Scania Cv Ab | Method and system for velocity adaptation during forward travel of a motor vehicle |
FR3012781B1 (en) * | 2013-11-05 | 2015-11-20 | Renault Sas | METHOD AND SYSTEM FOR CONTROLLING RECOVERY BRAKING OF AN ELECTRIC OR HYBRID MOTOR VEHICLE |
US10281926B2 (en) | 2017-01-23 | 2019-05-07 | Bendix Commercial Vehicle Systems Llc | Apparatus and method for controlling vehicles in a platoon |
DE102020126673A1 (en) * | 2020-10-12 | 2022-04-14 | Bayerische Motoren Werke Aktiengesellschaft | Vehicle guidance system and method for outputting information relating to a signaling unit |
Family Cites Families (8)
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NZ334228A (en) * | 1996-08-13 | 2001-02-23 | Paul Freda | Displaying predicted bus arrival times at bus stops, GPS system on bus transmits bus position to central processor |
CN1615498A (en) * | 2002-01-09 | 2005-05-11 | 克劳斯·瑞普 | Method for signalling a stop request at a request stop |
JP4702086B2 (en) | 2006-02-15 | 2011-06-15 | トヨタ自動車株式会社 | Vehicle driving support device |
JP4985176B2 (en) * | 2007-07-24 | 2012-07-25 | 日産自動車株式会社 | Intersection passing support device and intersection passing support method |
JP4723612B2 (en) | 2008-06-03 | 2011-07-13 | 株式会社日立製作所 | Electric vehicle control apparatus having fixed position automatic stop control means |
US8073605B2 (en) | 2008-08-13 | 2011-12-06 | GM Global Technology Operations LLC | Method of managing power flow in a vehicle |
DE102009014352B4 (en) | 2009-03-21 | 2024-03-21 | Mercedes-Benz Group AG | Method for using momentum by rolling out |
JP2011024353A (en) * | 2009-07-16 | 2011-02-03 | Aisin Aw Co Ltd | Guidance device, guidance method, and guidance program |
-
2011
- 2011-02-03 SE SE1150074A patent/SE535591C2/en not_active IP Right Cessation
-
2012
- 2012-01-31 WO PCT/SE2012/050091 patent/WO2012105896A1/en active Application Filing
- 2012-01-31 EP EP12742293.9A patent/EP2670643A4/en not_active Withdrawn
Non-Patent Citations (1)
Title |
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See references of WO2012105896A1 * |
Also Published As
Publication number | Publication date |
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EP2670643A4 (en) | 2018-01-17 |
WO2012105896A1 (en) | 2012-08-09 |
SE1150074A1 (en) | 2012-08-04 |
SE535591C2 (en) | 2012-10-09 |
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