SE537711C2 - Security system and method in connection with a parking brake - Google Patents

Security system and method in connection with a parking brake Download PDF

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Publication number
SE537711C2
SE537711C2 SE1251465A SE1251465A SE537711C2 SE 537711 C2 SE537711 C2 SE 537711C2 SE 1251465 A SE1251465 A SE 1251465A SE 1251465 A SE1251465 A SE 1251465A SE 537711 C2 SE537711 C2 SE 537711C2
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SE
Sweden
Prior art keywords
vehicle
parking brake
control signal
safety system
signal
Prior art date
Application number
SE1251465A
Other languages
Swedish (sv)
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SE1251465A1 (en
Inventor
Jonas Ekerli
Johan Hesse
Håkan Jonsson
Tomas Björnelund
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Scania Cv Ab
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Publication date
Application filed by Scania Cv Ab filed Critical Scania Cv Ab
Priority to SE1251465A priority Critical patent/SE537711C2/en
Priority to PCT/SE2013/051425 priority patent/WO2014098717A1/en
Publication of SE1251465A1 publication Critical patent/SE1251465A1/en
Publication of SE537711C2 publication Critical patent/SE537711C2/en

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Classifications

    • 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
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
    • 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
    • B60K28/00—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
    • B60K28/10—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the vehicle 
    • B60K28/14—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the vehicle  responsive to accident or emergency, e.g. deceleration, tilt of vehicle
    • 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
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/683—Electrical control in fluid-pressure brake systems by electrically-controlled valves in pneumatic systems or parts thereof
    • 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
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
    • 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
    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • 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
    • 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

Abstract

Sammandrao Ett sakerhetssystem (2) fOr en elektroniskt aktiverbar och avaktiverbar parkeringsbroms (4) for ett fordon (5), varvid sakerhetssystemet (2) ãr anpassat att generera en fOrsta styrsignal (6) till namnda parkeringsbroms (4), varvid styrsignalen (6) innefattar styrinstruktioner avseende aktivering eller avaktivering av parkeringsbromsen. Sakerhetssystemet är anpassat att ta emot en nOdsignal (8) fran en (manuellt paverkbar) nOdbrytare (10) i fordonet, och en hastighetssignal (12) som innefattar information om fordonets nuvarande hastighet. Om en nodsignal (8) mottagits och om fordonets nuvarande hastighet är lagre an en forutbestamd hastighetstroskel VT genereras namnda fOrsta styrsignal (6) flied styrinstruktioner att aktivera parkeringsbromsen (4), och att sakerhetssystemet (2) är anpassat att generera en andra styrsignal (14) anpassad att inaktivera ett eller flera vasentliga system (16) i fordonet, exempelvis bryta strOmmen eller stanga av motorn, varvid namnda andra styrsignal genereras om parkeringsbromsen aktiverats av den fOrsta styrsignalen. An safety system (2) for an electronically activatable and deactivable parking brake (4) for a vehicle (5), the safety system (2) being adapted to generate a first control signal (6) to said parking brake (4), the control signal (6) includes control instructions for activating or deactivating the parking brake. The safety system is adapted to receive an emergency signal (8) from a (manually actuatable) emergency switch (10) in the vehicle, and a speed signal (12) which includes information about the current speed of the vehicle. If a node signal (8) is received and if the current speed of the vehicle is lower than a predetermined speed threshold VT, said first control signal (6) is generated by control instructions to activate the parking brake (4), and that the safety system (2) is adapted to generate a second control signal (14 ) adapted to deactivate one or more essential systems (16) in the vehicle, for example interrupting the power or switching off the engine, said second control signal being generated if the parking brake is activated by the first control signal.

Description

Titel Sakerhetssystem och metod i samband med en parkeringsbroms Uppfinningens omrade Foreliggande uppf inning avser ett sakerhetssystem och en metod enligt ingresserna fOr de oberoende patentkraven. Title Safety system and method in connection with a parking brake Field of the invention The present invention relates to a safety system and a method according to the preambles of the independent patent claims.

I synnerhet avser uppfinningen ett sakerhetssystem fOr elektroniskt aktiverbara och avaktiverbara parkeringsbromsar fOr fordon. In particular, the invention relates to a safety system for electronically activatable and deactivatable parking brakes for vehicles.

Bakgrund till uppfinnincen Elektroniskt styrda parkeringsbromsar fOr personbilar och lastbilar blir alit vanligare. Dessa fungerar generellt sã att parkeringsbromsspaken är ersatt med en liten strombrytare och exempelvis en elektromagnet alstrar kraf ten som kravs for att aktivera parkeringsbromsen. Elektromagneten kan dra i handbromsvajern, alternativt sitta direkt pa bromsoket. Pneumatiska parkeringsbromsar är vanligast fOr lastbilar. En kraftig skruvfjader pressar pa en tryckstang som pressar ut backarna i parkeringsbromsen (trumbroms). For att lossa bromsen forses en balg med tryckluft som orkar motverka fjaderns kraft. När bromsen skall appliceras slapper man Lit tryckluften ur balgen och fjadern laser cla bromsen. Med elektroniskt aktiverade parkeringsbromsar avses i fareliggande ansiikan parkeringsbromsar som pa nagot salt kan aktiveras via en signal med styrinstruktioner som paverkar till exempel en vajer, ett pneumatiskt system, ett hydrauliskt system, eller liknande, som i sin tur aktiverar eller avaktiverar parkeringsbromsen. Parkeringsbromsen kan naturligtvis utgiiras av andra typer av bromsar, exempelvis en skivbroms. Background of the Invention Electronically controlled parking brakes for cars and trucks are becoming more common. These generally work so that the parking brake lever is replaced with a small circuit breaker and, for example, an electromagnet generates the force required to activate the parking brake. The electromagnet can pull on the parking brake cable, or sit directly on the brake caliper. Pneumatic parking brakes are most common for trucks. A powerful coil spring presses on a push rod that pushes out the jaws in the parking brake (drum brake). To release the brake, a bellows is supplied with compressed air that can counteract the force of the spring. When the brake is to be applied, release the compressed air from the bellows and release the laser cla brake. Electronically activated parking brakes in dangerous applications refer to parking brakes that can be activated on some salt via a signal with control instructions that affect, for example, a wire, a pneumatic system, a hydraulic system, or the like, which in turn activates or deactivates the parking brake. The parking brake can of course be applied by other types of brakes, for example a disc brake.

Det finns ett flertal olika losningar dal- en parkeringsbroms aktiveras eller avaktiveras i beroende av om ett villkor är uppfyllt eller inte. Nedan ges ett antal exempel pa sadana losningar. 1 US-2010/0294583 beskriver hur det upptacks att foraren har druckit alkohol och hur fordonet darefter immobiliseras, till exempel genom aktivering av en parkeringsbroms. There are a number of different solutions - a parking brake is activated or deactivated depending on whether a condition is met or not. Below are a number of examples of such solutions. 1 US-2010/0294583 describes how it is discovered that the driver has drunk alcohol and how the vehicle is then immobilized, for example by activating a parking brake.

DE-102006049419 beskriver ett system dal- fOraridentifiering och kontroll av parkeringsbroms ãr sammankopplade sã att parkeringsbromsen ãr aktiverad sâ lange som kOrtillstand ej har medgivits. DE-102006049419 describes a system for driver identification and control of the parking brake are interconnected so that the parking brake is activated as long as the driving condition has not been granted.

Det är idag sdledes mojligt att elektroniskt aktivera och avaktivera en pneumatisk parkeringsbroms. Detta kan gOras av anvandaren (foraren) eller automatiskt av ett kontrollsystem om vissa logiska villkor uppfylls. Det finns ocksã mojlighet att forhindra lossning av en ansatt parkeringsbroms om logiska villkor inte är uppfyllda. I de dokument som diskuterades ovan har olika logiska villkor namnts. ldag finns det krav i flera lander att det ska gá, vid till exempel en nOdsituation, att med en nod brytare i fordonet sla av motorn och strom men. Today, it is thus possible to electronically activate and deactivate a pneumatic parking brake. This can be done by the user (driver) or automatically by a control system if certain logical conditions are met. It is also possible to prevent the release of an applied parking brake if logical conditions are not met. In the documents discussed above, various logical conditions have been mentioned. Today, there are requirements in several countries that it should be possible, in the event of an emergency situation, for example, to switch off the engine and power with a node switch in the vehicle.

I foljande patentdokument beskrivs olika lOsningar inriktade pa att automatiskt ansatta parkeringsbromsen om olika forutbestdmda villkor är uppfyllda. The following patent documents describe various solutions aimed at automatically applying the parking brake if various predetermined conditions are met.

I exempelvis US-2008/0191546 beskrivs ett automatiskt bromssystem for ett motorfordon som innefattar ett reglersystem anpassat att reglera bromssystemet hos fordonet. For example, US-2008/0191546 describes an automatic braking system for a motor vehicle which comprises a control system adapted to control the braking system of the vehicle.

US-4572319 beskriver ett parkeringsbromssystem vilket ansatter parkeringsbromsen automatiskt dâ motorn stangts ay. US-4572319 describes a parking brake system which applies the parking brake automatically when the engine is stopped ay.

US-2008/0149437 beskriver ett system for automatisk bromsning. Nth' ett fordon blivit stillastdende efter att fardbromsen anvands kommer parkeringsbromsen automatiskt att ansaltas. Parkeringsbromsen kan aven ansattas i de fall det uppkommit defekter pa fardbromsen. 2 US-2003/0090150 avser en bromsanordning som automatiskt ska kunna sla pa parkeringsbromsen om fordonet till exempel varit med om en kollision och foraren saledes inte sjdlv kan stoppa bilen om den borjar rulla. US-2008/0149437 describes one system for automatic braking. If a vehicle has come to a standstill after the service brake has been applied, the parking brake will be applied automatically. The parking brake can also be applied in cases where defects have occurred on the service brake. 2 US-2003/0090150 refers to a braking device which should be able to automatically apply the parking brake if, for example, the vehicle has been involved in a collision and the driver is thus unable to stop the car himself if it starts to roll.

I WO-2009/156833 beskrivs en metod fOr att automatiskt kunna ansatta en parkeringsbroms. Detta kan ske till exempel ndr fararen Idmnar sitt fordon eller när motorn är avstangd. Det är aven majligt att parkeringsbromsen anvdnds som ett komplement till fdrdbromsen i en nodsituation. WO-2009/156833 describes a method for automatically applying a parking brake. This can happen, for example, when the driver Idmnar his vehicle or when the engine is switched off. It is also possible for the parking brake to be used as a complement to the front brake in an emergency situation.

I en nodsituation cla en nodbrytare som är anordnad i fordonet aktiverats är det inte alltid sakert att foraren har mojlighet att spiv ansatta parkeringsbromsen for att sdkerstalla att fordonet inte borjar rulla. Detta kan ge upphov till en farlig situation eftersom fordonet dâ kan rulla ivag stramlost och med en avstangd motor eftersom fOraren genom att aktivera nadbrytaren brutit strammen i fordonet. In an emergency situation cla an emergency switch arranged in the vehicle is activated, it is not always certain that the driver has the opportunity to apply the parking brake to ensure that the vehicle does not start rolling. This can give rise to a dangerous situation because the vehicle can then roll away without tension and with a shut-off engine because the driver has broken the tension in the vehicle by activating the circuit breaker.

Ett annat scenario är att foraren aktiverar nodbrytaren och att strammen slas av, antingen direkt, om fordonet redan star stilla, eller, om fordonet fortfarande rullar dâ nodbrytaren aktiveras, sá slas strommen av dâ fordonet stannat och star stilla. I bada fall medfor detta att ovriga system i fordonet, exempelvis en elektriskt aktiverbar parkeringsbroms, slutar fungera eftersom stramforsorjningen brutits och dven om foraren forsaker bromsa fordonet med parkeringsbromsen fungerar den inte. Another scenario is that the driver activates the node switch and that the power is switched off, either immediately, if the vehicle is already stationary, or, if the vehicle is still rolling when the node switch is activated, the power is switched off when the vehicle has stopped and is stationary. In both cases, this means that other systems in the vehicle, for example an electrically activatable parking brake, stop working because the power supply has been broken and even if the driver tries to brake the vehicle with the parking brake, it does not work.

Syftet med foreliggande uppfinning är att forbdttra sdkerheten for fordon i samband med att en nodbrytare aktiveras. The object of the present invention is to improve the safety of vehicles in connection with the activation of a node switch.

Sammanfattning av uppfinningen Ovan ndmnda syfte astadkommes med uppfinningen definierad av de oberoende patentkraven. SUMMARY OF THE INVENTION The above object is achieved by the invention defined by the independent claims.

Foredragna utforingsformer anges av de beroende patentkraven. 3 Genom att implementera fOreliggande uppfinning astadkommes en utokad funktionalitet som ger kundnytta i form av komfort och okad sakerhet. Detta astadkommes, enligt uppfinningen, genom att parkeringsbromsen ansatts automatiskt da nOdbrytaren aktiverats och fordonets hastighet är lagre an en fOrutbestamd hastighetstrOskel och inte direkt i beroende av fOrarens aktiva handlingar. Da parkeringsbromsens ansatts sâ fOrblir fordonet bromsat aven exempelvis i samband med en utrymning av fordonet. Darefter inaktiveras ett eller flera vasentliga system for fordonet, exempelvis genom att bryta strommen i fordonet, stanga av motorn, eller liknande. Preferred embodiments are set out in the dependent claims. By implementing the present invention, an unmatched functionality is achieved that provides customer benefit in the form of comfort and increased security. This is achieved, according to the invention, by applying the parking brake automatically when the switch is activated and the speed of the vehicle is lower than a predetermined speed threshold and not directly dependent on the active actions of the driver. When the parking brake is applied, the vehicle remains braked, for example in connection with an evacuation of the vehicle. Thereafter, one or more essential systems for the vehicle are deactivated, for example by breaking the current in the vehicle, switching off the engine, or the like.

Kort ritningsbeskrivning Figur 1 är ett schematiskt blockdiagram som illustrerar fOreliggande uppfinning. Figur 2 ãr ett flOdesdiagram som illustrerar metoden enligt f6redragna utfOringsformer av fOreliggande uppfinning. Brief Description of the Drawings Figure 1 is a schematic block diagram illustrating the present invention. Figure 2 is a flow chart illustrating the method of preferred embodiments of the present invention.

Detaljerad beskrivning av foredragna utforingsformer av uppfinningen Foreliggande uppfinning kommer nu att beskrivas i detalj med hanvisning till figurerna. Detailed Description of Preferred Embodiments of the Invention The present invention will now be described in detail with reference to the figures.

Med hanvisning till figur 1 avser fOreliggande uppf inning ett sakerhetssystem 2 for en elektroniskt aktiverbar och avaktiverbar parkeringsbroms 4 for ett fordon 5, exempelvis en lastbil, en buss, eller en personbil. Referring to Figure 1, the present invention relates to a safety system 2 for an electronically activatable and deactivatable parking brake 4 for a vehicle 5, for example a truck, a bus, or a passenger car.

Med elektroniskt aktiverade parkeringsbromsar avses, som namnts ovan, i fOreliggande ansokan parkeringsbromsar som pa nagot satt kan aktiveras och avaktiveras via en signal med styrinstruktioner som paverkar till exempel en vajer, ett pneumatiskt system, ett hydrauliskt system, eller liknande, som i sin tur aktiverar eller avaktiverar parkeringsbromsen. FOrutom att signalen som aktiverar eller avaktiverar parkeringsbromsen kan genereras av sakerhetssystemet enligt fOreliggande uppfinning, ãr det aven mOjligt for fOraren att manuellt aktivera eller avaktivera parkeringsbromsen, exempelvis genom att trycka in en knapp, 4 Enligt uppfinningen är sakerhetssystemet 2 anpassat att generera en forsta styrsignal 6 till namnda parkeringsbroms 4, varvid styrsignalen 6 innefattar styrinstruktioner avseende aktivering eller avaktivering av parkeringsbromsen. Electronically activated parking brakes, as mentioned above, in the present application refer to parking brakes which in some way can be activated and deactivated via a signal with control instructions which affect, for example, a wire, a pneumatic system, a hydraulic system, or the like, which in turn activates or disables the parking brake. In addition to the signal which activates or deactivates the parking brake can be generated by the safety system according to the present invention, it is also possible for the driver to manually activate or deactivate the parking brake, for example by pressing a button. 4 According to the invention the safety system 2 is adapted to generate a first control signal 6 to said parking brake 4, the control signal 6 comprising control instructions regarding activation or deactivation of the parking brake.

FOretradesvis tolkas styrinstruktionerna som mottagits av parkeringsbromsen 4 av en styrenhet, eller tillhorande logik, i parkeringsbromsen 4 som styr parkeringsbromsen att aktiveras eller avaktiveras. Alternativt styrs parkeringsbromsen direkt av styrsignalerna. Preferably, the control instructions received by the parking brake 4 are interpreted by a control unit, or associated logic, in the parking brake 4 which controls the parking brake to be activated or deactivated. Alternatively, the parking brake is controlled directly by the control signals.

Sakerhetssystemet är anpassat att ta emot en nodsignal 8 som fortrddesvis genereras av en nodbrytare 10 i fordonet. NOdbrytaren kan vara manuellt paverkbar av foraren eller av flagon annan i fordonet. Den sitter foretradesvis Ian dtkomlig fOr foraren. Det kan finnas flera nOdbrytare placerade pa olika stallen i fordonet, vilket kan vara aktuellt om fordonet är en buss. Brytaren kan till exempel sitta under ett genomskinligt plastlock som falls at sidan om nOdbrytaren skall aktiveras. The security system is adapted to receive a node signal 8 which is preferably generated by a node switch 10 in the vehicle. The emergency switch can be manually actuated by the driver or by another flake in the vehicle. It is preferably accessible to the driver. There may be several emergency switches located in different places in the vehicle, which may be relevant if the vehicle is a bus. The switch can, for example, be located under a transparent plastic lid which falls on the side of the emergency switch to be activated.

Nodbrytaren kan aven vara automatiskt paverkbar och dâ avge en nOdsignal i beroende av en avkand handelse, till exempel en kraftig retardation eller en kollision. Enligt en annan variant kan nOdbrytaren vara kopplad till en akustisk sensor och kan dâ vara roststyrd, exempelvis om foraren ropar Mgt. The node switch can also be automatically actuated and then emit an emergency signal depending on a failed operation, for example a severe deceleration or a collision. According to another variant, the emergency switch can be connected to an acoustic sensor and can then be rust-controlled, for example if the driver shouts Mgt.

Enligt ett alternativ är nOdsignalen 8 anpassad att genereras av andra system i fordonet. Det kan exempelvis intraffa dá nagon av ett antal fordefinierade farliga situationer har intraffat eller hailer pa att intraffa, till exempel relaterat till fordonets hastighet. According to an alternative, the nOds signal 8 is adapted to be generated by other systems in the vehicle. This can occur, for example, when one of a number of predefined dangerous situations has occurred or is about to occur, for example related to the speed of the vehicle.

Sakerhetssystemet är vidare anpassat att ta emot en hastighetssignal 12 som innefattar information om fordonets nuvarande hastighet. Hastighetssignalen finns exempelvis tillganglig via fordonets databussystem. The security system is further adapted to receive a speed signal 12 which includes information about the current speed of the vehicle. The speed signal is available, for example, via the vehicle's data bus system.

Fordonets nuvarande hastighet jamfors i sakerhetssystemet med en forutbestamd hastighetstraskel VT och om en nodsignal 8 mottagits och om fordonets nuvarande hastighet är lagre an den farutbestamda hastighetstroskeln VT genereras namnda forsta styrsignal 6 med styrinstruktioner att aktivera parkeringsbromsen 4, dvs. parkeringsbromsen erhaller styrsignaler som innebar att den skall bromsa fordonet och liana det bromsat. Hastighetstraskeln VT är en lag hastighet, faretradesvis 8 km/h eller lagre. Den kan till exempel sattas till noll km/h, dvs. forst dâ fordonet star stilla sá aktiveras parkeringsbromsen om nacibrytaren aktiverats. The current speed of the vehicle is compared in the safety system with a predetermined speed threshold VT and if a node signal 8 is received and if the current speed of the vehicle is lower than the predetermined speed threshold VT, the first control signal 6 is generated with control instructions to activate the parking brake 4, ie. the parking brake receives control signals which meant that it must brake the vehicle and line it braked. The speed threshold VT is a low speed, dangerously 8 km / h or lower. It can, for example, be set to zero km / h, ie. only when the vehicle is stationary will the parking brake be activated if the naci switch is activated.

Sakerhetssystemet 2 är vidare anpassat att generera en andra styrsignal 14 anpassad att inaktivera ett eller flera vasentliga system 16 i fordonet, varvid namnda andra styrsignal genereras om parkeringsbromsen aktiverats av den forsta styrsignalen 6. Faretradesvis är sdkerhetssystemet 2 aven anpassat att ta emot en aterkopplingssignal f ran parkeringsbromsen som bekraftelse att den har aktiverats och är ansatt och utgor dá en forutsattning far att den andra styrsignalen 14 skall kunna genereras. The safety system 2 is further adapted to generate a second control signal 14 adapted to deactivate one or more essential systems 16 in the vehicle, said second control signal being generated if the parking brake is activated by the first control signal 6. Preferably, the safety system 2 is also adapted to receive a feedback signal from the parking brake as confirmation that it has been activated and is engaged and then constitutes a prerequisite for the second control signal 14 to be generated.

Med vasentliga system 16 for fordonet avses system som är viktiga att stanga av vid en nodsituation, exempelvis motorn, branslepumpar, kylsystem, elektriska matningssystem. Essential systems 16 for the vehicle refer to systems that are important to switch off in an emergency situation, for example the engine, fuel pumps, cooling systems, electrical supply systems.

Enligt en utfaringsform ãr den andra styrsignalen anpassad att bryta strammen i fordonet, vilket dä far till faljd att flertalet system i fordonet blir stramlasa. According to one embodiment, the second control signal is adapted to break the current in the vehicle, which then results in the majority of systems in the vehicle becoming unloaded.

Enligt en annan utforingsform är den andra styrsignalen anpassad att stanga av motorn i fordonet, exempelvis genom att bryta strommatningen till vissa delar av motorn, eller att strypa bransletillforseln till motorn. According to another embodiment, the second control signal is adapted to switch off the engine in the vehicle, for example by breaking the power supply to certain parts of the engine, or to restrict the supply of fuel to the engine.

For att bryta strammen i fordonet kan exempelvis den andra styrsignalen 14 vara anpassad att paverka en batterifranskiljare i fordonet sâ att strammatningen bryts till motorn och andra system i fordonet. Batterifranskiljaren ãr anordnad i anslutning till fordonets batterisystem och genom att bryta strammen nara 6 batterisystemet blir de fiesta av fordonets system stromlosa vilket ãr onskvart i en nadsituation, exempelvis am en brand utbrutit. To break the current in the vehicle, for example, the second control signal 14 may be adapted to actuate a battery disconnector in the vehicle so that the current supply to the engine and other systems in the vehicle is broken. The battery disconnector is arranged in connection with the vehicle's battery system and by breaking the current near the battery system, most of the vehicle's systems become without electricity, which is undesirable in an emergency situation, for example if a fire has broken out.

Enligt en utfOringsform galler att am sakerhetssystemet detekterar att ingen nOdsignal langre mottagits avges den fOrsta styrsignalen med styrinstruktioner att avaktivera parkeringsbromsen. Det viii saga, dá nOdbrytaren aterstalls sá avaktiveras parkeringsbromsen. According to one embodiment, the security system detects that no emergency signal has been received, the first control signal is issued with control instructions to deactivate the parking brake. The viii saga, when nOdbrytaren reset then the parking brake is deactivated.

Enligt en annan utforingsform gaiier att am sakerhetssystemet detekterar att ingen nOdsignal langre mottagits och att parkeringsbromsen manuellt avaktiverats avges den fOrsta styrsignalen med styrinstruktioner att avaktivera parkeringsbromsen. Det viii saga, da nodbrytaren aterstalls sa avaktiveras parkeringsbromsen under fOrutsattning att parkeringsbromsen manuellt avaktiverats. En variant pa denna utfOringsform staffer som ytterligare krav fOr att parkeringsbromsen skall kunna avaktiveras att am parkeringsbromsen skall kunna avaktiveras sa maste avaktiveringen begaras efter det att nodbrytaren aterstallts. According to another embodiment, the security system detects that no emergency signal has been received and that the parking brake has been manually deactivated, the first control signal is issued with control instructions to deactivate the parking brake. It viii saga, when the emergency switch is reset so the parking brake is deactivated on the condition that the parking brake is manually deactivated. A variant of this embodiment serves as an additional requirement for the parking brake to be deactivated so that the parking brake can be deactivated, so the deactivation must be requested after the emergency switch has been reset.

Foreliggande uppf inning innefattar aven en metod i ett sakerhetssystem for en elektroniskt aktiverbar och avaktiverbar parkeringsbroms for ett fordon. Metoden illustreras av flodesschemat i figur 2. The present invention also includes a method in a security system for an electronically activatable and deactivatable parking brake for a vehicle. The method is illustrated by the flow chart in Figure 2.

Aktiveringen eller avaktiveringen av parkeringsbromsen sker i beroende av en fOrsta styrsignal till parkeringsbromsen, och att styrsignalen innefattar styrinstruktioner avseende aktivering eller avaktivering av parkeringsbromsen. Sakerhetssystemet är anpassat att: - ta emot en nOdsignal fran en nodbrytare; - ta emot en hastighetssignal som innefattar information am fordonets nuvarande hastighet, och att metoden innefattar stegen att: - generera en fOrsta styrsignal med styrinstruktioner att aktivera parkeringsbromsen am en nOdsignal mottagits och am fordonets nuvarande hastighet är lagre an en fOrutbestarnd hastighetstrOskel, och att darefter: - generera en andra styrsignal anpassad att inaktivera vasentliga system i fordonet. 7 Med vasentliga system for fordonet avses system som är viktiga att stanga av vid en nodsituation, exempelvis motorn, branslepumpar, kylsystem, elektriska matningssystem. The activation or deactivation of the parking brake takes place in dependence on an initial control signal to the parking brake, and that the control signal includes control instructions regarding activation or deactivation of the parking brake. The security system is adapted to: - receive an node signal from a node switch; - receiving a speed signal comprising information at the current speed of the vehicle, and that the method comprises the steps of: - generating a first control signal with control instructions to activate the parking brake when an emergency signal is received and the current speed of the vehicle is lower than a predetermined speed threshold, and then: - generate a second control signal adapted to deactivate essential systems in the vehicle. 7 Essential systems for the vehicle refer to systems that are important to switch off in an emergency situation, for example the engine, fuel pumps, cooling systems, electrical supply systems.

Enligt en utfOringsform ãr den andra styrsignalen anpassad att bryta strOmmen i fordonet, vilket dâ far till fOljd att flertalet system i fordonet blir strOmlOsa. According to one embodiment, the second control signal is adapted to cut off the current in the vehicle, which then results in the majority of systems in the vehicle becoming currentless.

Enligt en annan utforingsform är den andra styrsignalen anpassad att stanga av motorn i fordonet, exempelvis genom att bryta strommatningen till vissa delar av motorn, eller att strypa bransletillforseln till motorn. According to another embodiment, the second control signal is adapted to switch off the engine in the vehicle, for example by breaking the power supply to certain parts of the engine, or to restrict the supply of fuel to the engine.

I figuren illustreras metoden genom att det kontrolleras om en nOdsignal mottagits, om sâ är fallet jamfOr nuvarande hastighet fOr fordonet med det forutbestamda hastighetstrOskelvardet VT och om nuvarande hastighet understiger VT aktiveras parkeringsbromsen och darefter bryts stromforsorjningen i fordonet. Hastighetstroskeln VT är en lag hastighet, foretradesvis 8 km/h eller lagre. Den kan till exempel sattas till noll km/h, dvs. forst dã fordonet star stilla sã aktiveras parkeringsbromsen om nodbrytaren aktiverats. The figure illustrates the method by checking if an emergency signal has been received, if so compared to the current speed of the vehicle with the predetermined speed threshold value VT and if the current speed is below VT, the parking brake is activated and then the power supply in the vehicle is interrupted. The speed threshold VT is a low speed, preferably 8 km / h or lower. It can, for example, be set to zero km / h, ie. only when the vehicle is stationary will the parking brake be activated if the emergency switch is activated.

Foretradesvis ãr den andra styrsignalen anpassad att paverka en batterifranskiljare i fordonet och darigenom bryta strOmmatningen till motorn och andra system i fordonet. Preferably, the second control signal is adapted to actuate a battery disconnector in the vehicle and thereby cut off the power supply to the engine and other systems in the vehicle.

Da sakerhetssystemet, enligt en utfOringsform, detekterar att ingen nOdsignal langre mottagits avges den forsta styrsignalen med styrinstruktioner att avaktivera parkeringsbromsen. Since the safety system, according to one embodiment, detects that no emergency signal has been received any longer, the first control signal is issued with control instructions to deactivate the parking brake.

Enligt en annan utfOringsform, dã sakerhetssystemet detekterar att ingen nOdsignal langre mottagits och att parkeringsbromsen manuellt avaktiverats avges den fOrsta styrsignalen med styrinstruktioner att avaktivera parkeringsbromsen. En variant pa denna utfOringsform staller som ytterligare krav 8 for att parkeringsbromsen skall kunna avaktiveras att om parkeringsbromsen skall kunna avaktiveras sâ maste avaktiveringen begaras efter det att n6dbrytaren aterstallts. According to another embodiment, when the safety system detects that no emergency signal has been received and that the parking brake has been manually deactivated, the first control signal is issued with control instructions to deactivate the parking brake. A variant of this embodiment poses as an additional requirement 8 for the parking brake to be deactivated, so that if the parking brake can be deactivated, the most deactivation must be requested after the emergency switch has been reset.

FOreliggande uppf inning avser aven datorprogramprodukt innefattande datorprograminstruktioner som ãr konfigurerade att utfora stegen enligt metoden som beskrivits ovan, när datorprograminstruktionerna kOrs pa ett datorsystem, clar datorprogramprodukten är lasbar av en dator. Datorprogrammet kan vara implementerat i exempelvis sakerhetssystemet som beskrivits ovan. Alternativt kan det ingd i ett overordnat reglersystem for fordonet. The present invention also relates to a computer program product comprising computer program instructions configured to perform the steps of the method described above, when the computer program instructions run on a computer system, the computer program product is readable by a computer. The computer program can be implemented in, for example, the security system described above. Alternatively, it can be part of an overall control system for the vehicle.

Foreliggande uppf inning är inte begransad till ovan-beskrivna foredragna utforingsformer. Olika alternativ, modifieringar och ekvivalenter kan anvandas. UtfOringsformerna ovan skall darfOr inte betraktas som begransande uppfinningens skyddsomfang vilket definieras av de bifogade patentkraven. 9 The present invention is not limited to the preferred embodiments described above. Various alternatives, modifications and equivalents can be used. The above embodiments are, therefore, not to be construed as limiting the scope of the invention as defined by the appended claims. 9

Claims (15)

Patentkrav 1. En metod i ett sakerhetssystem (2) for en elektroniskt aktiverbar och avaktiverbar parkeringsbroms (4) for ett fordon i beroende av en forsta styrsignal (6) till namnda parkeringsbroms, varvid styrsignalen innefattar styrinstruktioner avseende aktivering eller avaktivering av parkeringsbromsen, kannete ck n ad a v att sakerhetssystemet är anpassat att:A method in a security system (2) for an electronically activatable and deactivatable parking brake (4) for a vehicle depending on a first control signal (6) for said parking brake, the control signal comprising control instructions for activating or deactivating the parking brake, can ck n ad that the security system is adapted to: 1. ta emot en nOdsignal (8), foretradesvis Than en nOdbrytare (10); 2. ta emot en hastighetssignal (12) som innefattar information om fordonets nuvarande hastighet, och att metoden innefattar stegen att: - generera en forsta styrsignal med styrinstruktioner att aktivera parkeringsbromsen om en nodsignal mottag its och om fordonets nuvarande hastighet är lagre an en forutbestamd hastighetstroskel, och att darefter: 3. generera en andra styrsignal (14) anpassad att inaktivera ett eller flera vasentliga system (16) f6r fordonet och att sakerhetssystemet (16) vidare är anpassat att ta emot en aterkopplingssignal fran parkeringsbromsen som bekraftelse att den har aktiverats och är ansatt och utg6r da en forutsattning for att den andra styrsignalen skall kunna genereras.1. receive an nOdsignal (8), preferably than an nOdswitch (10); 2. receiving a speed signal (12) comprising information on the current speed of the vehicle, and that the method comprises the steps of: - generating a first control signal with control instructions to activate the parking brake if a node signal is received and if the current speed of the vehicle is lower than a predetermined speed threshold , and subsequently: 3. generating a second control signal (14) adapted to deactivate one or more essential systems (16) for the vehicle and that the safety system (16) is further adapted to receive a feedback signal from the parking brake as confirmation that it has been activated and is employed and then constitutes a prerequisite for the second control signal to be generated. 2. Metoden enligt krav 1, varvid namnda andra styrsignal (14) är 20 anpassad att bryta strommen i fordonet.The method of claim 1, wherein said second control signal (14) is adapted to break the current in the vehicle. 3. Metoden enligt krav 1 eller 2, varvid narrinda andra styrsignal är anpassad att stanga av fordonets motor.The method according to claim 1 or 2, wherein the second control signal is adapted to switch off the vehicle's engine. 4. Metoden enligt nagot av kraven 1-3, varvid namnda andra styrsignal är anpassad att paverka en batterifranskiljare i fordonet och darigenom bryta str6mmatningen till motorn och andra system i fordonet.The method according to any one of claims 1-3, wherein said second control signal is adapted to actuate a battery disconnector in the vehicle and thereby interrupt the power supply to the engine and other systems in the vehicle. 5. Metoden enligt nagot av kraven 1-4, varvid om sakerhetssystennet detekterar att ingen nodsignal langre mottagits avges namnda forsta styrsignal med styrinstruktioner att avaktivera parkeringsbromsen.The method according to any one of claims 1-4, wherein if the safety system detects that no node signal has been received any longer, said first control signal is issued with control instructions to deactivate the parking brake. 6. Metoden enligt nagot av kraven 1-4, varvid om sakerhetssystemet detekterar att ingen nodsignal langre mottagits och att parkeringsbromsen manuellt avaktiverats avges namnda forsta styrsignal med styrinstruktioner att avaktivera parkeringsbromsen.The method according to any one of claims 1-4, wherein if the safety system detects that no node signal has been received anymore and that the parking brake has been manually deactivated, said first control signal is given with control instructions to deactivate the parking brake. 7. Metoden enligt nagot av kraven 1-6, varvid namnda hastighetstroskel är 8 km/h.The method according to any one of claims 1-6, wherein said speed threshold is 8 km / h. 8. Ett sakerhetssystem (2) fOr en elektroniskt aktiverbar och avaktiverbar parkeringsbroms (4) for ett fordon (5), varvid sakerhetssystemet (2) är anpassat att generera en forsta styrsignal (6) till namnda parkeringsbroms (4), varvid styrsignalen (6) innefattar styrinstruktioner avseende aktivering eller avaktivering av parkeringsbromsen, kannetecknat av att sakerhetssystemet innefattar en styrenhet anpassad att ta emot en nodsignal (8), foretradesvis fran en n6dbrytare (10) i fordonet, och en hastighetssignal (12) som innefattar information om fordonets nuvarande hastighet, och om en nodsignal (8) nnottagits och om fordonets nuvarande hastighet är lagre an en forutbestannd hastighetstroskel VT genereras namnda f6rsta styrsignal (6) med styrinstruktioner att aktivera parkeringsbromsen (4), och att styrenheten hos sakerhetssystemet (2) är anpassad att generera en andra styrsignal (14) anpassad att inaktivera ett eller flera vasentliga system (16) for fordonet, varvid namnda andra styrsignal genereras om parkeringsbromsen aktiverats av den f6rsta styrsignalen och att sakerhetssystemet (2) vidare är anpassat att ta emot en aterkopplingssignal Than parkeringsbromsen (4) som bekraftelse att den har aktiverats och är ansatt och utgOr da en fOrutsattning fOr att den andra styrsignalen (14) skall kunna genereras.A safety system (2) for an electronically activatable and deactivatable parking brake (4) for a vehicle (5), the safety system (2) being adapted to generate a first control signal (6) to said parking brake (4), the control signal (6 ) includes control instructions for activating or deactivating the parking brake, characterized in that the safety system comprises a control unit adapted to receive a node signal (8), preferably from an emergency switch (10) in the vehicle, and a speed signal (12) containing information on the current speed of the vehicle , and if a node signal (8) has been received and if the current speed of the vehicle is lower than a predetermined speed threshold VT, said first control signal (6) is generated with control instructions to activate the parking brake (4), and that the control unit of the safety system (2) is adapted to generate a second control signal (14) adapted to deactivate one or more essential systems (16) for the vehicle, said second control system signal is generated if the parking brake is activated by the first control signal and that the safety system (2) is further adapted to receive a feedback signal than the parking brake (4) as confirmation that it has been activated and is applied and then constitutes a prerequisite for the second control signal (14) must be able to be generated. 9. Sakerhetssystennet enligt krav 8, varvid namnda andra styrsignal (14) är anpassad att bryta strom men i fordonet.The safety system according to claim 8, wherein said second control signal (14) is adapted to break current in the vehicle. 10. Sakerhetssystennet enligt krav 8 eller 9, varvid namnda andra 11 styrsignal (14) är anpassad att stanga av fordonets motor.The safety system according to claim 8 or 9, wherein said second control signal (14) is adapted to switch off the vehicle's engine. 11. Sakerhetssystemet enligt nagot av kraven 8-10, varvid namnda andra styrsignal (14) är anpassad att paverka en batterifranskiljare i fordonet och darigenom bryta strOmmatningen till motorn och andra system i fordonet.The safety system according to any one of claims 8-10, wherein said second control signal (14) is adapted to actuate a battery disconnector in the vehicle and thereby interrupt the power supply to the engine and other systems in the vehicle. 12. Sakerhetssystennet enligt nagot av kraven 8-11, varvid sakerhetssystemet är anpassad att, om sakerhetssystemet detekterar att ingen nOdsignal langre mottagits, avge namnda fOrsta styrsignal med styrinstruktioner att avaktivera parkeringsbromsen.The safety system according to any one of claims 8-11, wherein the safety system is adapted to, if the safety system detects that no emergency signal has been received any longer, emit said first control signal with control instructions to deactivate the parking brake. 13. Sakerhetssystennet enligt nagot av kraven 8-11, varvid sakerhetssystemet är anpassad att, om sakerhetssystemet detekterar att ingen nodsignal langre mottag its och att parkeringsbromsen man uellt avaktiverats, avge namnda forsta styrsignal med styrinstruktioner att avaktivera parkeringsbromsen.The safety system according to any one of claims 8-11, wherein the safety system is adapted to, if the safety system detects that no node signal has been received and that the parking brake has been deactivated, emits said first control signal with control instructions to deactivate the parking brake. 14. Sakerhetssystennet enligt nagot av kraven 8-13, varvid namnda hastighetstroskel är 8 km/h.The safety system according to any one of claims 8-13, wherein said speed threshold is 8 km / h. 15. Datorprogramprodukt innefattande datorprograminstruktioner som är konfigurerade att utfora stegen enligt metoden enligt nagot av kraven 1-7, nar datorprograminstruktionerna 'A computer program product comprising computer program instructions configured to perform the steps of the method according to any of claims 1-7, when the computer program instructions'
SE1251465A 2012-12-20 2012-12-20 Security system and method in connection with a parking brake SE537711C2 (en)

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US4572319A (en) * 1984-10-03 1986-02-25 Fail Safe Brake Corporation Automatic vehicle braking system
US6522246B1 (en) * 2000-07-13 2003-02-18 Joy A. Williams Motor vehicle emergency system
US20030090150A1 (en) * 2001-11-09 2003-05-15 Min Su Woo Braking device for vehicles
DE102004006374A1 (en) * 2004-02-09 2005-08-25 Volkswagen Ag Method and device for activating an electric parking brake
DE102005023665C5 (en) * 2005-05-23 2020-05-14 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Method for automatically braking a vehicle equipped with an electronically controlled braking device
DE102006049419A1 (en) * 2006-10-16 2008-04-17 Conti Temic Microelectronic Gmbh Motor vehicle, has common controller for controlling driving authorization system and electronically controllable parking brake system, where controller checks presence of driving authorization for controlling parking brake system
US20080191546A1 (en) * 2007-02-13 2008-08-14 Louis Gino Plantamura Automatic braking system for a motor vehicle
DE102008030511B4 (en) * 2008-06-27 2013-05-23 Agco Gmbh Brake system for a vehicle
DE102008063952A1 (en) * 2008-12-19 2010-06-24 Wabco Gmbh Method for operating a parking brake device, parking brake device, brake system for carrying out the method, brake system with this parking brake device and vehicle for carrying out the method or with this parking brake device or with this brake system
US8196694B2 (en) * 2009-05-21 2012-06-12 GM Global Technology Operations LLC Vehicle immobilizer methods and apparatus based on driver impairment

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