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Code Issues 154 Wiki Activity

AI: don't cut the power for a brake already released below 0.4 bar

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When the AI takes power after a brake release, determine_consist_state()
marks the consist not Ready if any vehicle's distributor reports the lap
or application state (b_hld | b_on), whatever the speed, and the sanity
check in control_handles() then puts the master controller back to zero.
A distributor stays in the lap position until the brake pipe has fully
recharged, so a few seconds after a release, with 0.2-0.3 bar left in a
cylinder, one wagon of a train is enough to throw an EU07 or EP09 that
has just reached the 2nd-5th position back to zero; it starts again
moments later.

The check in motion was meant to be lenient (brake force over 10 kN),
but the distributor state was applied at any speed. In motion it now
counts only when the cylinder holds more than 0.4 bar, the UIC figure
already used a few lines below for a released brake. At a stand the
check is unchanged.

Measured in real time against master, two runs of each scenery (a 20 per
mille descent, flat and a 10 per mille climb with 32 consists each, and a
descent with 15 freight trains of other wagon types), with a 20 km/h
restriction one coach long: throttle-downs to zero in motion caused by
readiness drop from 13 to 1, 7 to 2, 0 to 0 and 13 to 6. Each of those
left has a wagon over 0.4 bar that is applying or lapped, or one still
releasing with more than 10 kN at walking pace. No coupler broke; signal
overruns, speeds in the restriction and rolling back on the climb
are the same as on master within run-to-run spread.
This commit is contained in:
pwarszawski
2026-09-28 20:53:58 +02:00
parent 8fbb482350
commit f2f152e5d3
1 changed files with 6 additions and 3 deletions
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9
vehicle/Driver.cpp
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@@ -5983,9 +5983,12 @@ TController::determine_consist_state() {
auto const bp { std::max( 0.0, vehicle->BrakePress - ( vehicle->SpeedCtrlUnit.Parking ? vehicle->MaxBrakePress[ 0 ] * vehicle->StopBrakeDecc : 0.0 ) ) };
if (Ready) {
// bo jak coś nie odhamowane, to dalej nie ma co sprawdzać
if( TestFlagAny(vehicle->Hamulec->GetBrakeStatus(), b_hld | b_on)
|| ( vehicle->Vel < 1.0 ? bp > 0.4 : // ensure the brakes are sufficiently released when starting to move
vehicle->Fb * 0.001 > 10.0 ) ) { // once in motion we can make a more lenient check
auto const isbraking { TestFlagAny( vehicle->Hamulec->GetBrakeStatus(), b_hld | b_on ) };
if( vehicle->Vel < 1.0 ?
isbraking || bp > 0.4 : // ensure the brakes are sufficiently released when starting to move
// once in motion a brake down to 0.4 bar counts as released (UIC), even if its distributor
// is still in the lap position while the brake pipe recharges
( isbraking && bp > 0.4 ) || vehicle->Fb * 0.001 > 10.0 ) {
Ready = false;
}
// Ra: odluźnianie przeładowanych lokomotyw, ciągniętych na zimno - prowizorka...