Commercial Vehicle Systems Product DATA Doc. No. Y09 (EN - Rev. 00) January 0 Application Knorr-Bremse s intelligent axle loading system,, is designed to work on: Semi-trailers with two to five axles Centre-axle trailers with two or three axles Purpose On semi-trailers and centre-axle trailers, the axle/bogie will act as a pivot point that, depending on the positioning of the cargo carried by the trailer, will influence the loading of the towing vehicle. In many multi-drop operations, if the cargo is badly positioned or if some cargo is off-loaded without consideration for the distribution of the remaining cargo, this can result in overloading of the towing vehicle s drive axle(s). is a function within Knorr-Bremse s TEBS G. braking system which interfaces with the trailer s air suspension system and adjusts the pressure in the air bags of an axle to move the effective pivot point and attempt to bring the load on the driving axle of the towing vehicle down to the legal maximum. A further benefit of is reduction in tyre wear. Function Axle loading On semi-trailers is normally applied to the rear axle of the bogie and works with the trailer s air suspension system and any lift axle controls to intelligently manage the load imposed on the tractor s kingpin and therefore on its drive axle. Axle loading (without ) Over loaded Axle loading (with ) Air bag pressure reduced On centre-axle trailers is applied to either the front or rear axle of the bogie. If is used on the front axle it is designed to manage the load imposed on the towing vehicle s coupling to maintaining stability of the combination. If is used on the rear axle it is designed to intelligently manage the load being imposed on the towing vehicle s coupling to keep the drive axle load within legal limits. Coupling loading Coupling loading (without ) Over loaded When is active, any lift axle forward of the axle is disabled to ensure that the performance is optimised. When is not active ( Disabled ), the axle controlled by is treated as a normal lift axle under the control of the automatic lift axle control logic. Coupling loading (with ) Air bag pressure reduced Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße 80. 80809 Munich. Germany. Tel: +9 89-0. Fax: +9 89 -. www.knorr-bremse.com. www.knorr-bremsecvs.com
Product Data Doc. No. Y09 (EN - Rev. 00) January 0 System Requirements requires the following components: Part No. Type No. Description In the range K090 to K099* ES00 TEBS G. Brake Module (TBM) [Software version 00. or higher] K0900 ES0 Trailer Electro-Pneumatic Module Premium (TEPM-P) [Software version 00. or higher] K008 BR99 Pressure Control Valve (PCV) K00, K008, K009* - PCV Connecting Cables (, 9, m) See TEBS G. Product Manual Y0 for suitable cables TEPM-P Connecting Cables * alternatives depending on vehicle design specification may be fitted on trailers with lift axle control (LAC) and icorner. Installation - typical installation TEBS G. Brake Module (TBM) Trailer Electro-Pneumatic Module Premium (TEPM-P) Pressure Control Valve (PCV) Levelling Valve SmartLoad00bw Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße 80. 80809 Munich. Germany. Tel: +9 89-0. Fax: +9 89 -. www.knorr-bremse.com. www.knorr-bremsecvs.com
Commercial Vehicle Systems Doc. No. Y09 (EN - Rev. 00) January 0 is a function of the TEBS G. braking system and requires the fitment of a suitable TEBS G. Brake Module (TBM) plus a Trailer Electro-Pneumatic Module Premium (TEPM-P) and a Pressure Control Valve (PCV) - see System Requirements. The TEPM-P is used to control the service braking on the axle to be controlled by and the PCV controls the air pressure in the air suspension on that axle. All other equipment is as would be installed on a standard TEBS G. system. Note: Knorr-Bremse recommends a minimum air suspension reservoir capacity of 0 litres for. During operation the pressure in the air bags of the controlled axle will be reduced and so the system must provide separate anti-lock (ABS) control of the service brakes on that axle. This is achieved by having a S/M system with the TEPM-P acting as the third modulator. The TBM and the TEPM-P should be installed as specified in the TEBS G. Product Manual Y0. The PCV should be installed centrally above the controlled axle, ideally with the supply to the air bags coming from a T-piece at the PCV. The air suspension connection to port of the TEPM-P must come from the air bag on that axle which is further from the PCV. The TEPM-P and PCV are connected to the In-Out Connector of the TEBS G. Brake Module. A disable switch should be fitted to allow the driver to disable the function. ISO 8 Trailer Electro-pneumatic Module Premium (TEPM-P) S-A X S-B 8 RD BN 8 9 0 /GN /BN Pressure Control Valve (PCV) () () () (BN)... () () () () () () (BN) RD BN /GN /BN BN 8 9 0 V_VALVE V_ECU GND_H GND_M WL V-CAN-H V-CAN-L AUX IO AUX IO AUX IO SENS_Sup / TriState SENS_In / TriState SENS_GND Brake-Light V Brake-Light GND V-CAN-L V-CAN-H AUX IO - RET AUX IO - RET S-D S-C S-E In-Out Power S-F TEBS G. - ECU _00 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße 80. 80809 Munich. Germany. Tel: +9 89-0. Fax: +9 89 -. www.knorr-bremse.com. www.knorr-bremsecvs.com
Product Data Doc. No. Y09 (EN - Rev. 00) January 0 Set Up Setting up of is carried out using the Knorr Bremse ECUtalk diagnostic software. ECUtalk version...0 or higher is required. This can be downloaded from Knorr BremseCVS.com. Note: example shown here is a -axle semi-trailer. Use ECUtalk, select Information then Change Configuration to configure the system. Click Next. Select the axle to be controlled by. Note: on centre-axle trailers the axle controlled by can be either behind or in front of the non-lifting axle. Click on Next. Set the required control parameters. can be automatically disabled below a given axle/bogie load ( Disable ) and re-enabled above a higher axle/bogie load ( Enable ). Once is disabled below the set axle/bogie load, the controlled axle will have only a minimum pressure maintained in its air bags - the default pressure is 0. bar but this can be adjusted. This pressure is the minimum that will be retained in the air bags during any and lift axle control operation. Retaining a minimum pressure prevents the axle being damaged due to oscillation or bouncing on poor road services and mimics use of a pressure retention valve fitted in conventional suspension control circuits. The Load [%] setting controls the degree of load that can be experienced on the other (non-controlled) axle(s). The default is set to 00% but it may also be possible to program different values (from 90% upwards). Click on when all of the required parameters are set. is now ready for operation. Note: Note: Ensure that the recommendations of the axle manufacturer are observed with regard to overload. It is the vehicle manufacturer s responsibility to ensure that the air suspension system is capable of supplying sufficient air pressure and volume to the air bags of the axles not raised or off-loaded during operation to ensure that the required axle load is carried by those axles. Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße 80. 80809 Munich. Germany. Tel: +9 89-0. Fax: +9 89 -. www.knorr-bremse.com. www.knorr-bremsecvs.com
Commercial Vehicle Systems Doc. No. Y09 (EN - Rev. 00) January 0 Operation is a function of Knorr-Bremse s TEBS G. braking system which interfaces with the trailer s air suspension system and adjusts the pressure in the air bags of an axle to adjust the load carried by that axle. TEBS G. with also controls the brakes on that axle separately. Example: -axle semi-trailer with controlling axle The suspension pressure in the air bags of axles and is measured by the pressure transducer in port of the TBM while the pressure in the air bags on axle is measured by the transducer in port of the TEPM-P. The signal for the transducer in the TEPM-P is then fed to the TBM. constantly monitors the bogie load carried by axles and as a percentage of the total bogie load. If the cargo distribution has resulted in load being removed behind the trailer bogie, when recognises that there is a risk of overloading the tractor s drive axle because of the cargo forward of the trailer s bogie, will reduce the pressure in the air bag on axle using the PCV. This will result in more load being carried by axles and, and less being imposed on the king pin and consequently the tractor s drive axle. will ensure that the non-controlled axles of the trailer will be laden up to its programmed maximum (see page ). The default setting is 00%. If this load figure has been reduced during Set Up then will adjust the load accordingly. Example: -axle centre-axle trailer with controlling axle The suspension pressure in the air bags of axle is measured by the pressure transducer in port of the TBM, while the pressure in the air bags on axle is measured by the transducer in port of the TEPM-P. constantly monitors the load carried by axle as a percentage of total bogie load. If the cargo distribution has resulted in load being removed behind the trailer bogie, when calculates that there is a risk of overloading the towing vehicle s drive axle because of the cargo forward of the trailer s bogie, will operate as in the semi-trailer example above. Example: -axle centre-axle trailer with controlling axle On a centre-axle trailer which carries a fork lift truck on the rear of the trailer to assist in unloading, when the trailer is unladen the presence of the fork lift truck will reduce the load on the trailer coupling which could lead to instability of the trailer. In this situation would be installed on axle to move the fulcrum point towards the rear and counter the effect of the fork lift truck. The activation of results in the reduction of load imposed on the axle it controls and so this will increase the risk of wheel locking during braking. For this reason the service braking of this controlled axle is always supplied through the TEPM-P thus enabling independent ABS control of the axle controlled by. In general is deactivated when the bogie load falls below Disable setting (see Set Up). Below this load the trailer is lightly loaded and there is no need for its function. is not re-activated until the bogie load exceeds the Enable setting (see Set Up). Note: within the air bags of the controlled axle have a configurable minimum pressure below which the pressure is not reduced. This prevents bouncing of the axle which may cause damage to the trailer or the road. during operation, any lift axle forward of the fixed axle, or forward of the axle controlled by will be lowered automatically, as keeping it raised would have a negative effect on s performance. when is not active ( Disabled), the axle(s) controlled by is treated as a normal lift axle under the control of the automatic lift axle control logic. Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße 80. 80809 Munich. Germany. Tel: +9 89-0. Fax: +9 89 -. www.knorr-bremse.com. www.knorr-bremsecvs.com
Product Data Doc. No. Y09 (EN - Rev. 00) January 0 can be disabled in several ways: disable switch connected to any AUXIO pin. Traction Help (TH) request from the towing vehicle activation of the Automatic Traction Control (ATC) function on the towing vehicle. bogie load falls below the setting of Disable (see Set Up). The priority of relative to other functions is shown below: Priority Function Description Highest Auxiliary Design Language (ADL) Lowest Activation of a function will override any action requested by a function with a lower priority ISO 99 or J99 CAN commands Driver request ISO 99 CAN ATC status icorner Automatic Lift Axle Control (LAC) An ADL program may override any calculated lift axle state. A command such as Raise or Lower a lift axle will disable all lower priority functions. Driver request via a connected manual switch input such as Traction Help. ATC Active will cause an automatic Traction Help request. An icorner command will override any or Automatic Lift Axle Control command. An command will override any Automatic Lift Axle Control command. If no other request is active then the Automatic Lift Axle Control will take control of the lift axle(s). Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße 80. 80809 Munich. Germany. Tel: +9 89-0. Fax: +9 89 -. www.knorr-bremse.com. www.knorr-bremsecvs.com