Are we missing blended braking in OR?
#41
Posted 06 January 2016 - 06:58 AM
Can be enabled by the MSTS way: BrakesEngineControllers( "Independent, Train, Dynamic, Blended" )
There are two new parameters for Engine ( ) block:
-OrtsDynamicBlendingOverride ( 1 ) eng parameter makes dynamic brake lever always override blending command if, the lever is not at 0. If this is not enabled, the higher command is applied, for example: blending command is 40% and the dynamic brake lever is at 60%, then the dynamic brake percentage will be 60%.
-OrtsDynamicBlendingForceMatch ( 1 ) parameter makes the dynamic brake blending alorithm to try to achieve the same dynamic brake force as the airbrake would have (in case of bailoff)/ or has. for example: if the airbrake force would be 28 kN, then the dynamic brake force will try to hold the same force.
The dynamic brake blending uses "virtual cylinder pressure" so the bailoff, does not affects it, so you're free to use that.
Brake_Dynamic block (which defines dynamic brake lever) is not needed to make blending work, as there are locomotives that don't have DB lever, but have blending.
Example eng for Acela HHP acelaHHPblendingexample.zip (4.58K)
Number of downloads: 277 (note, acela has a very narrow dynamic braking range, which fades completely over 100 km/h)
#42
Posted 06 January 2016 - 05:23 PM
Is this correct ?
Thanks
#43
Posted 07 January 2016 - 01:24 AM
No. When dynamic brake stop work, air brake start work. Increas pressure in brake cylinder according to pressure in brake pipe. The lokomotive can not be without braking.
#44
Posted 07 January 2016 - 03:33 AM
Coolhand101, on 06 January 2016 - 05:23 PM, said:
Is this correct ?
Thanks
Yes it is, as DynamicBrakeHasAutoBailOff( 1 ) is set. And it bails off the airbrake when dynamic brake is activated, which does not depend on speed. This isn't changed at all.
Compensating airbrake is a different story, for the future.
#45
Posted 09 January 2016 - 05:20 AM
If the engineer applies brake, the pressure in the brake pipe goes down e.g. from 5 to 4.7 bar. As soon as the dynamic brake starts working the pressure in the brake cylinder goes down to 0 bar (DynamicBrakeHasAutoBailOff( 1 )). This is all right in OR.
If he applies brakes again from 4.7 to 4.3 bar, the pressure in the brake cylinder doesn't increase anymore. It stays on 0 bar. This doesn´t work corretly in OR. Because the pressure in the brake cylinder grows up and then goes down.
At speeds when the dynamic brake stops working (according to dynamic brake curve) the pressure in the brake cylinder grows according to the pressure in the brake pipe.Did you mean this by compensating airbrake?
#46
Posted 09 January 2016 - 08:07 AM
It is normal that on a unit or even locomotive that has only one handle to control the power and brakes, when the dynamic brake is being applied and the train is coming into a stop, air brakes will be applied as soon as the dynamic stops having effect. Some rolling stock does indeed compensate the dynamic braking with the air brakes.
#47
Posted 09 January 2016 - 08:28 AM
Thanks! :)
#48
Posted 09 January 2016 - 01:34 PM
#49
Posted 14 January 2016 - 05:16 PM
hroch, on 09 January 2016 - 05:20 AM, said:
If the engineer applies brake, the pressure in the brake pipe goes down e.g. from 5 to 4.7 bar. As soon as the dynamic brake starts working the pressure in the brake cylinder goes down to 0 bar (DynamicBrakeHasAutoBailOff( 1 )). This is all right in OR.
If he applies brakes again from 4.7 to 4.3 bar, the pressure in the brake cylinder doesn't increase anymore. It stays on 0 bar. This doesn´t work corretly in OR. Because the pressure in the brake cylinder grows up and then goes down.
At speeds when the dynamic brake stops working (according to dynamic brake curve) the pressure in the brake cylinder grows according to the pressure in the brake pipe.Did you mean this by compensating airbrake?
You are correct, sir! I did a test for myself and I've noticed the same thing.The air pressure should go up immediately once the dynamic is fading out, but it doesn't so that the train could stay in position safely.I'm starting to think that the implemented blending algorithm in OR might not work properly without compensating air brakes at the end.
#50
Posted 14 January 2016 - 06:05 PM