From 1a47dd79d4d2565c76f7c49fcad29cf92286d4c5 Mon Sep 17 00:00:00 2001
From: Michael Krisper <michael.krisper@tugraz.at>
Date: Thu, 10 Nov 2016 13:26:43 +0100
Subject: [PATCH] AT-ShiftStrategy: Added 2L-DownShiftCurve-Check for 2C gear
(2C->1C)
---
.../Impl/ATShiftStrategy.cs | 29 ++++++++++++++-----
1 file changed, 22 insertions(+), 7 deletions(-)
diff --git a/VectoCore/VectoCore/Models/SimulationComponent/Impl/ATShiftStrategy.cs b/VectoCore/VectoCore/Models/SimulationComponent/Impl/ATShiftStrategy.cs
index 84585fab8f..47b4abb55e 100644
--- a/VectoCore/VectoCore/Models/SimulationComponent/Impl/ATShiftStrategy.cs
+++ b/VectoCore/VectoCore/Models/SimulationComponent/Impl/ATShiftStrategy.cs
@@ -101,10 +101,8 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
NextGear.SetState(absTime, true, 1, false);
return true;
}
-
}
- if (gear == 1 && !_gearbox.TorqueConverterLocked && outTorque.IsSmaller(0) && inTorque.IsGreater(0))
- {
+ if (gear == 1 && !_gearbox.TorqueConverterLocked && outTorque.IsSmaller(0) && inTorque.IsGreater(0)) {
NextGear.SetState(absTime, true, 1, false);
return true;
}
@@ -114,7 +112,10 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
NextGear.SetState(absTime, false, 1, false);
return true;
}
+
+ // Emergency Shift if lower than engine idle speed
if (inAngularVelocity.IsSmaller(DataBus.EngineIdleSpeed)) {
+ Log.Debug("engine speed would fall below idle speed - shift down");
if (_gearbox.TorqueConverterLocked) {
// downshift L -> L / C
if (Data.Gears[gear].HasTorqueConverter) {
@@ -137,9 +138,10 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
return true;
}
NextGear.SetState(absTime, false, gear - 1, !Data.Gears[gear - 1].HasTorqueConverter);
- Log.Debug("engine speed would fall below idle speed - shift down");
return true;
}
+
+ // Emergency shift if higher than engine rated speed
if (inAngularVelocity.IsGreaterOrEqual(DataBus.EngineRatedSpeed)) {
Log.Debug("engine speed would be above rated speed - shift up");
if (Data.Gears.ContainsKey(gear + 1) && (_gearbox.TorqueConverterLocked || Data.Gears[gear + 1].HasTorqueConverter)) {
@@ -153,7 +155,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
return true;
}
- // 1C -> ?
+ // 1C -> ? -- switching directly from 1C to 2L is not allowed
throw new VectoSimulationException(
"AngularVelocity is higher than EngineRatedSpeed, Current gear has active torque converter (1C) but no locked gear (no 1L) and shifting directly to 2L is not allowed.");
}
@@ -230,11 +232,24 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
}
} else {
// already in converter mode
+
+ // check not possible
+ if (inAngularVelocity == null)
+ return false;
+
+ // downshift not possible
if (!Data.Gears.ContainsKey(gear - 1)) {
- // downshift not possible
return false;
}
- if (inAngularVelocity != null && inAngularVelocity.IsSmaller(DataBus.EngineIdleSpeed)) {
+
+ // emergency down shift
+ if (inAngularVelocity.IsSmaller(DataBus.EngineIdleSpeed)) {
+ NextGear.SetState(absTime, false, gear - 1, false);
+ return true;
+ }
+
+ // 2C -> 1C: shift also down if below downshiftcurve of 2L
+ if (IsBelowDownShiftCurve(gear - 1, inTorque, inAngularVelocity)) {
NextGear.SetState(absTime, false, gear - 1, false);
return true;
}
--
GitLab