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Compression braking

Discussion in 'General Discussion' started by djcsishere, Sep 5, 2013.

  1. djcsishere

    djcsishere
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    Hi,
    First time posting here, so i am doing so hesitantly.... :)

    Does any form of compression braking exist?
    I have found so far that most of the compression braking seems to be non existent.
    If i am on a flat road and accelerate then take my "foot off the gas", the revs stay constant and not drop?

    Sorry if this has already been pointed out.
     
    #1 djcsishere, Sep 5, 2013
  2. Davidbc

    Davidbc
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    Not happening to me. I rev the engine, then take my foot off the gas and the revs go down to idle state.
     
    #2 Davidbc, Sep 5, 2013
  3. djcsishere

    djcsishere
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    What about when driving?
     
    #3 djcsishere, Sep 6, 2013
  4. Davidbc

    Davidbc
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    Then the car starts slowing down until it stops. Have you installed an engine mod?
     
    #4 Davidbc, Sep 6, 2013
  5. djcsishere

    djcsishere
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    No, Stock install using stock cars.
    What would be the preferred way for me to video it for everyone?

    DJ
     
    #5 djcsishere, Sep 7, 2013
  6. Mythbuster

    Mythbuster
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    There is no proper compression braking. At the moment it only functions in a very low geared car(like a rockcrawler). Needs to be coded again properly I guess :/
     
    #6 Mythbuster, Sep 7, 2013
  7. estama

    estama
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    BeamNG Team

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    There are two types of engine braking simulated.

    The first is internal engine friction braking ("engineFriction").

    The second, is internal engine compression braking, that you are talking about. This scales the internal engine braking forces with the engine's RPMs.

    I'm not so sure about how much this affects real life engines.

    At this link:

    http://www.physicsforums.com/showthread.php?t=179641

    they make a valid point, that the air that gets compressed, then returns the energy back to the engine when the cylinder expands.

    Nevertheless, the parameter for compression braking is there ("brakingCoef") for anyone that wishes to use it.
     
    #7 estama, Sep 8, 2013
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