From 9b7da778696f546d635db0ca96f2e0bfe57075f5 Mon Sep 17 00:00:00 2001
From: Markus Quaritsch <markus.quaritsch@tugraz.at>
Date: Thu, 28 May 2020 11:35:02 +0200
Subject: [PATCH] adding fall-back way in case no TC operating point can be
found - partly ignore TC characteristics
---
.../Models/SimulationComponent/Impl/Driver.cs | 28 ++++++++++++++++++-
1 file changed, 27 insertions(+), 1 deletion(-)
diff --git a/VectoCore/VectoCore/Models/SimulationComponent/Impl/Driver.cs b/VectoCore/VectoCore/Models/SimulationComponent/Impl/Driver.cs
index d8d24b3db4..4956e219e1 100644
--- a/VectoCore/VectoCore/Models/SimulationComponent/Impl/Driver.cs
+++ b/VectoCore/VectoCore/Models/SimulationComponent/Impl/Driver.cs
@@ -541,6 +541,22 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
}
}
+ // try again without changing the engine speed to 'spare' inertia torque
+ engineSpeed = DataBus.EngineSpeed;
+ tcOp = EstimateTCOpPoint(operatingPoint, dryRunResp, engineSpeed, tc);
+
+ if (tcOp.Item1.Item2.IsBetween(tcOp.Item2, tcOp.Item3)) {
+ if (!dryRunResp.TorqueConverterOperatingPoint.OutTorque.IsEqual(tcOp.Item1.Item1.OutTorque)) {
+ tc.SetOperatingPoint = tcOp.Item1.Item1;
+ }
+ try {
+ var acceleration = SearchAccelerationFixedTC(absTime, gradient, operatingPoint, tcOp.Item1, dryRunResp);
+ return ComputeTimeInterval(acceleration, operatingPoint.SimulationDistance);
+ } catch (Exception e) {
+ Log.Error(e, "Failed to find acceleration for tc operating point! absTime: {0}", absTime);
+ throw;
+ }
+ }
// Attempt 2: search for an input speed (ICE speed) so that a valid operating point for
// the torque converter and the engine are found. Estimate max torque, drag torque. calculate delta
@@ -560,7 +576,17 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
});
} catch (Exception e) {
Log.Error(e, "Failed to find engine speed for valid torque converter operating point! absTime: {0}", absTime);
- throw;
+
+ // if no engine speed can be found that results in an operating point on the TC curve, set the TC in-torque to the maximum
+ // available from the engine. reverse-calc TC-in-torque from average engine torque
+ var tcInPwrPrev = (DataBus.EngineSpeed + tcOp.Item1.Item1.InAngularVelocity) * tcOp.Item1.Item2 -
+ (tcOp.Item1.Item1.InAngularVelocity * tcOp.Item1.Item1.InTorque);
+ tcOp.Item1.Item1.InTorque = (2 * tcOp.Item3 * tcOp.Item1.Item1.InAngularVelocity - tcInPwrPrev) /
+ tcOp.Item1.Item1.InAngularVelocity;
+ tc.SetOperatingPoint = tcOp.Item1.Item1;
+ var acceleration = SearchAccelerationFixedTC(absTime, gradient, operatingPoint, tcOp.Item1, dryRunResp);
+
+ return ComputeTimeInterval(acceleration, operatingPoint.SimulationDistance);
}
// a suitable engine sped was found - search acceleration to match TC out-torque
--
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