fix: retarder does not apply its torque loss when used as primary retarder and clutch is open

VectoCore/VectoCore/Models/SimulationComponent/Impl/Retarder.cs

@@ -49,6 +49,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 	{
 		private readonly RetarderLossMap _lossMap;
 		private readonly double _ratio;
+		private bool _primaryRetarder;
 
 		/// <summary>
 		/// Creates a new Retarder.
@@ -71,8 +72,8 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 
 		public IResponse Request(Second absTime, Second dt, NewtonMeter torque, PerSecond angularVelocity, bool dryRun = false)
 		{
-			if (angularVelocity == null) {
-				return NextComponent.Request(absTime, dt, torque, null, dryRun);
+			if (angularVelocity == null || (_primaryRetarder && !DataBus.ClutchClosed(absTime))) {
+				return NextComponent.Request(absTime, dt, torque, angularVelocity, dryRun);
 			}
 			var avgAngularSpeed = (PreviousState.InAngularVelocity + angularVelocity) / 2.0;
 			var retarderTorqueLoss = _lossMap.GetTorqueLoss(avgAngularSpeed * _ratio) * _ratio;