NWH Vehicle Physics 2 Documentation
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—NWH:VehiclePhysics2:Powertrain:ClutchComponent [2023/05/16 09:34] (current) – nwhcoding
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 +======= Clutch Component ======
 +
 +[{{ :NWH:VehiclePhysics2:Powertrain:pasted:20230408-234644.png|Clutch inspector. }}]
 +
 +''ClutchComponent'' can be bypassed by setting the output of ''EngineComponent'' directly to the desired ''PowertrainComponent'' but this is not recommended as it will cause stalling in most cases.
 +
 +== Clutch Control ==
 +There are two things to note here: clutch engagement and clutch input. Clutch input controls the engagement through the //Engagement Curve// and is set either automatically, through user input, or scripting/inspector. It is best to think of the //Clutch Input// value as the pedal position, and the engagement as the "biting point" of the clutch.
 +
 +  * ''Automatic'' sets the clutch engagement based on the input (engine) RPM. 
 +    * The final engagement RPM, which is the RPM at which the clutch engagement is at 1 (100%), is the sum of ''engagementRPM'', ''throttleEngagementOffsetRPM'' and ''engagementRange''.
 +  * ''UserInput'' type can be used to give control to the user through a gamepad, steering wheel, etc.
 +    * When this control type is selected, the clutch is controlled through the ''Clutch'' axis - check [[Setup:Input|Input]] section for more info on setting up axes.
 +  * ''Manual'' type does not set the clutch value in any way and instead expects to be set externally, either through the inspector or through scripting.
 +
 +== Slip Torque ==
 +  * When ''Has Torque Converter'' is false ''Slip Torque'' is used. Otherwise, the clutch will use ''Torque Converter Slip Torque''. \\]
 +  * Slip torque for an average clutch should be slightly higher than the maximum engine torque—usually a few hundred to a few thousand Nm.
 +  * Too high ''Slip Torque'' will result in grabby clutch.
 +  * Using too high ''Slip Torque'' values can result in torque spikes when the clutch is suddenly released which can impact solver stability in extreme cases.\\
 +  * Values near zero will result in the engine spinning up as if the clutch is not engaged due to clutch slip.\\
 +
 +== Creep ==
 +  * Some automatic transmissions have slight creep when engaged in D or R. This is normally caused by the torque converter (which is essentially a  type of clutch) and it allows some of the torque from the engine to escape to the wheels. 
  
NWH Vehicle Physics 2 Documentation

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