WABCO TAILGUARD - Variant: Autonomous Braking Via a Prepared Interface for Tailguard

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Toenableancillaryautonomousbrakingactions,theadditionalvalvesfamiliarfromtheABSbrakingsystemare
installed.Thereareonlytwomaindifferences:
 Here,theoutputtedbrakingpressureisnotforwardedtoanLSVregulatorbecauseitstaskistakenoverbytheaxis
modulator.Instead,thebrakingpressureisfedtothecontrolinputofanadditionallyinstalledrelayvalve.Thetask
ofthisvalveistoshortentheresponsetimeoftheautonomousbrake.
 TheoutputpressureoftherelayvalvethenreachestheTristopcylindersoftherearaxleviathetwolikewise
additionallyinstalledtwo-wayvalves(7).
5.3 Variant: Autonomous braking via a prepared interface for
TailGUARD™
To avoid any accidents, observe the following safety instructions for
vehicles with braking intervention through TailGUARD:
 Vehicles with a prepared interface for TailGUARD: TailGUARD may not
brakeifthevehicle’sEBSsystemhasafault.
Withthisvariant,separatevalvesdonothavetobeinstalledbecausetheautonomousbrakingactionsareeffected
usingtheexistingEBSservicebrakesystemofthetowingvehicle.
Dependingontheinterfacetothetowingvehicle,theopticalindicationscanbeshownonthedisplayonthevehicle's
instrumentpanel.Hardwarecanalsobeinstalledinthedriver'scabbythevehiclemanufacturerfortheacoustic
signalling.Otherwise,aTrailerRemoteControlcanbeusedhereaswellforopticalandacousticindicationpurposes.
Withthisvariant,theECUisconnectedtotheTailGUARD™interfacettedthevehiclemanufacturerbyfourmulti-core
connectingcables.Theseareused,amongotherthings,
 tosupplypowertotheECU,
 totransmittherequestsignalfortheautonomousbrakingaction,
 toreporterrorstates,
 andforconnectingtheECUtothecorrespondingon-boardCANbus.
OntherstavailablevehicleserieswithanoptionallypreparedTailGUARD™interface,theMercedes-BenzEconic
Euro6,thevehicleinterfacecomprisesthreemulti-pinsocketsX1,X2andX3.Thecorrespondingthreeconnector
housingsneedtobeobtainedfromthevehiclemanufacturer,andarethenttedwiththefourconnectingcables
suppliedbyWABCO.
Otherwise,theECUisconnectedtoadedicateddiagnosticsocketaswiththeothertwovariants.
Required components: Overview