diff --git a/VectoCore/Models/SimulationComponent/Impl/BusAuxiliariesAdapter.cs b/VectoCore/Models/SimulationComponent/Impl/BusAuxiliariesAdapter.cs
index 09a46b3711a68bedb4689b4cd2ba26e4b0fb4715..74e60329be0a396ddeb88f970b11d125667a2eaa 100644
--- a/VectoCore/Models/SimulationComponent/Impl/BusAuxiliariesAdapter.cs
+++ b/VectoCore/Models/SimulationComponent/Impl/BusAuxiliariesAdapter.cs
@@ -181,6 +181,8 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 			Auxiliaries.Signals.ClutchEngaged = DataBus.ClutchClosed(absTime);
 			Auxiliaries.Signals.EngineDrivelinePower = (float)(torquePowerTrain * angularSpeed / 1000).Value();
 			Auxiliaries.Signals.EngineDrivelineTorque = (float)torquePowerTrain.Value();
+			Auxiliaries.Signals.Internal_Engine_Power =
+				(float)((torqueEngine * angularSpeed - DataBus.BrakePower) / 1000).Value();
 			if (DataBus.DrivingBehavior == DrivingBehavior.Coasting) {
 				// make sure smart aux are _not_ enabled for now
 				// set internal_engine_power a little bit lower so there is no excessive power for smart aux
diff --git a/VectoCoreTest/Integration/BusAuxiliaries/AuxDemandTest.cs b/VectoCoreTest/Integration/BusAuxiliaries/AuxDemandTest.cs
index 321168a5d9f5b096ce516b4419a8e4e164799df9..540c0b2fda597ed7f244dc64aa657c90e764a861 100644
--- a/VectoCoreTest/Integration/BusAuxiliaries/AuxDemandTest.cs
+++ b/VectoCoreTest/Integration/BusAuxiliaries/AuxDemandTest.cs
@@ -1,6 +1,7 @@
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 using NUnit.Framework;
 using TUGraz.VectoCore.Models.Simulation.Data;
+using TUGraz.VectoCore.Models.Simulation.DataBus;
 using TUGraz.VectoCore.Models.Simulation.Impl;
 using TUGraz.VectoCore.Models.SimulationComponent.Data;
 using TUGraz.VectoCore.Models.SimulationComponent.Data.Engine;
@@ -21,26 +22,8 @@ namespace TUGraz.VectoCore.Tests.Integration.BusAuxiliaries
 		public void AuxDemandtest(double vehicleWeight, double engineSpeedRpm, double driveLinePower, double internalPower,
 			double expectedPowerDemand)
 		{
-			var auxFilePath = @"TestData\Integration\BusAuxiliaries\AdvAuxTest.aaux";
-			var engineFLDFilePath = @"TestData\Integration\BusAuxiliaries\24t Coach.vfld";
-			var engineFCMapFilePath = @"TestData\Integration\BusAuxiliaries\24t Coach.vmap";
-
-			var vehicle = new VehicleContainer();
-			var fcMap = FuelConsumptionMap.ReadFromFile(engineFCMapFilePath);
-			var fld = EngineFullLoadCurve.ReadFromFile(engineFLDFilePath);
-			var modelData = new CombustionEngineData() {
-				ConsumptionMap = fcMap,
-				FullLoadCurve = fld,
-				IdleSpeed = 560.SI<PerSecond>()
-			};
-
-			var engine = new CombustionEngine(vehicle, modelData);
-			//new Vehicle(vehicle, new VehicleData());
-			var driver = new MockDriver(vehicle) { VehicleStopped = false };
-			var gbx = new MockGearbox(vehicle) { Gear = 1 };
-
-			var busAux = new BusAuxiliariesAdapter(vehicle, auxFilePath, "Coach", vehicleWeight.SI<Kilogram>(),
-				fcMap, modelData.IdleSpeed);
+			MockDriver driver;
+			var busAux = CreateBusAuxAdapterForTesting(vehicleWeight, out driver);
 
 
 			var engineDrivelinePower = (driveLinePower * 1000).SI<Watt>();
@@ -53,6 +36,7 @@ namespace TUGraz.VectoCore.Tests.Integration.BusAuxiliaries
 			Assert.AreEqual(expectedPowerDemand, (torque * engineSpeed).Value(), 1e-4);
 		}
 
+
 		[Test]
 		public void AuxFCConsumptionTest()
 		{
@@ -60,28 +44,8 @@ namespace TUGraz.VectoCore.Tests.Integration.BusAuxiliaries
 			var engineSpeedRpm = 1256;
 			var internalPower = 148;
 
-
-			var auxFilePath = @"TestData\Integration\BusAuxiliaries\AdvAuxTest.aaux";
-			var engineFLDFilePath = @"TestData\Integration\BusAuxiliaries\24t Coach.vfld";
-			var engineFCMapFilePath = @"TestData\Integration\BusAuxiliaries\24t Coach.vmap";
-
-			var vehicle = new VehicleContainer();
-			var fcMap = FuelConsumptionMap.ReadFromFile(engineFCMapFilePath);
-			var fld = EngineFullLoadCurve.ReadFromFile(engineFLDFilePath);
-			var modelData = new CombustionEngineData() {
-				ConsumptionMap = fcMap,
-				FullLoadCurve = fld,
-				IdleSpeed = 560.SI<PerSecond>()
-			};
-
-			var engine = new CombustionEngine(vehicle, modelData);
-			//new Vehicle(vehicle, new VehicleData());
-			var driver = new MockDriver(vehicle) { VehicleStopped = false };
-			var gbx = new MockGearbox(vehicle) { Gear = 1 };
-
-			var busAux = new BusAuxiliariesAdapter(vehicle, auxFilePath, "Coach", 12000.SI<Kilogram>(),
-				fcMap, modelData.IdleSpeed);
-
+			MockDriver driver;
+			var busAux = CreateBusAuxAdapterForTesting(12000, out driver);
 
 			var engineDrivelinePower = (driveLinePower * 1000).SI<Watt>();
 			var engineSpeed = engineSpeedRpm.RPMtoRad();
@@ -122,5 +86,31 @@ namespace TUGraz.VectoCore.Tests.Integration.BusAuxiliaries
 
 			Assert.AreEqual(162.4655, ((SI)modalData[ModalResultField.AA_TotalCycleFC_Grams]).Value(), 0.0001);
 		}
+
+
+		public static BusAuxiliariesAdapter CreateBusAuxAdapterForTesting(double vehicleWeight, out MockDriver driver)
+		{
+			var auxFilePath = @"TestData\Integration\BusAuxiliaries\AdvAuxTest.aaux";
+			var engineFLDFilePath = @"TestData\Integration\BusAuxiliaries\24t Coach.vfld";
+			var engineFCMapFilePath = @"TestData\Integration\BusAuxiliaries\24t Coach.vmap";
+
+			var vehicle = new VehicleContainer();
+			var fcMap = FuelConsumptionMap.ReadFromFile(engineFCMapFilePath);
+			var fld = EngineFullLoadCurve.ReadFromFile(engineFLDFilePath);
+			var modelData = new CombustionEngineData() {
+				ConsumptionMap = fcMap,
+				FullLoadCurve = fld,
+				IdleSpeed = 560.SI<PerSecond>()
+			};
+
+			var engine = new CombustionEngine(vehicle, modelData);
+			//new Vehicle(vehicle, new VehicleData());
+			driver = new MockDriver(vehicle) { VehicleStopped = false, DrivingBehavior = DrivingBehavior.Braking };
+			var gbx = new MockGearbox(vehicle) { Gear = 1 };
+			var brakes = new MockBrakes(vehicle);
+			var busAux = new BusAuxiliariesAdapter(vehicle, auxFilePath, "Coach", vehicleWeight.SI<Kilogram>(),
+				fcMap, modelData.IdleSpeed);
+			return busAux;
+		}
 	}
 }
\ No newline at end of file
diff --git a/VectoCoreTest/Utils/MockBrakes.cs b/VectoCoreTest/Utils/MockBrakes.cs
new file mode 100644
index 0000000000000000000000000000000000000000..e15984ca019b54c5bd4289b128890752bf355e36
--- /dev/null
+++ b/VectoCoreTest/Utils/MockBrakes.cs
@@ -0,0 +1,22 @@
+using TUGraz.VectoCore.Models.Simulation;
+using TUGraz.VectoCore.Models.Simulation.Impl;
+using TUGraz.VectoCore.Models.SimulationComponent;
+using TUGraz.VectoCore.OutputData;
+using TUGraz.VectoCore.Utils;
+
+namespace TUGraz.VectoCore.Tests.Utils
+{
+	public class MockBrakes : VectoSimulationComponent, IBrakes
+	{
+		public MockBrakes(IVehicleContainer vehicle) : base(vehicle)
+		{
+			BrakePower = 0.SI<Watt>();
+		}
+
+		public Watt BrakePower { get; set; }
+
+		protected override void DoWriteModalResults(IModalDataContainer container) {}
+
+		protected override void DoCommitSimulationStep() {}
+	}
+}
\ No newline at end of file
diff --git a/VectoCoreTest/Utils/MockDriver.cs b/VectoCoreTest/Utils/MockDriver.cs
index 850dcaa305b279aa049892c05d0dee439a939b07..84367abcb57a0958bce63e3718d59accf0fcbfc3 100644
--- a/VectoCoreTest/Utils/MockDriver.cs
+++ b/VectoCoreTest/Utils/MockDriver.cs
@@ -48,7 +48,10 @@ namespace TUGraz.VectoCore.Tests.Utils
 
 		public RequestData LastRequest;
 
-		public MockDriver(IVehicleContainer container) : base(container) {}
+		public MockDriver(IVehicleContainer container) : base(container)
+		{
+			DrivingBehavior = DrivingBehavior.Accelerating;
+		}
 
 		protected override void DoWriteModalResults(IModalDataContainer container) {}
 
@@ -116,9 +119,6 @@ namespace TUGraz.VectoCore.Tests.Utils
 
 		public bool VehicleStopped { get; set; }
 
-		public DrivingBehavior DrivingBehavior
-		{
-			get { return DrivingBehavior.Accelerating; }
-		}
+		public DrivingBehavior DrivingBehavior { get; set; }
 	}
 }
\ No newline at end of file
diff --git a/VectoCoreTest/VectoCoreTest.csproj b/VectoCoreTest/VectoCoreTest.csproj
index c070e3a203a5de1976f6c149c117068a067de4af..5dbc501bbd7582eaabdf9a885b6a3a764b1f8fdc 100644
--- a/VectoCoreTest/VectoCoreTest.csproj
+++ b/VectoCoreTest/VectoCoreTest.csproj
@@ -78,6 +78,7 @@
     <Compile Include="FileIO\SimulationDataReaderTest.cs" />
     <Compile Include="GraphProgram.cs" />
     <Compile Include="Integration\BusAuxiliaries\AuxDemandTest.cs" />
+    <Compile Include="Integration\BusAuxiliaries\BusAdapterTest.cs" />
     <Compile Include="Integration\BusAuxiliaries\SimpleCycleTest.cs" />
     <Compile Include="Integration\CoachAdvancedAuxPowertrain.cs" />
     <Compile Include="Integration\CoachPowerTrain.cs" />
@@ -101,6 +102,7 @@
     <Compile Include="Integration\Truck40tPowerTrain.cs" />
     <Compile Include="Models\SimulationComponent\GearboxPowertrainTest.cs" />
     <Compile Include="Utils\InputDataHelper.cs" />
+    <Compile Include="Utils\MockBrakes.cs" />
     <Compile Include="Utils\MockEngineDataProvider.cs" />
     <Compile Include="Utils\MockSimulationDataFactory.cs" />
     <Compile Include="Utils\MockVairVehicleContainer.cs" />