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Thread: How Does Traction Control Work?

  1. #1
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    How Does Traction Control Work?

    Just wondering what it does to keep traction. I know some systems cut spark timing, some actuate the brakes... Just wondering what it is that the G6 uses to keep traction.

  2. #2
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    Re: How Does Traction Control Work?

    Gives and Takes away power from the slipping wheel(s) its all in the transmission. Thats why I hit that nice little TC button

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    Re: How Does Traction Control Work?

    Well it depends on what trim level you have. For 2007 the SE had the option of T/C{NW7} and it's engine-torque-modulated. The GT has full function {NW9} engine-torque and brake-modulation and the GTP uses stabili track. You should at least fill out your cars profile so we know what trim and year of G6 you have.



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    Re: How Does Traction Control Work?

    If you have the standard TC (IE no stabilitrak/ESC) it uses the ABS sensor to look for variations in wheel speed IE slip and modulates engine power accordingly using spark cut/fuel cut or closing the TB (depends on the car which modes it uses) it also has the ability to upshift the transmission in automatic equipped vehicles. If you have Stailitrak/ESC add in the ability of the system to apply individual or more brake calipers to control the vehicles yaw.
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    Re: How Does Traction Control Work?

    I have to turn it off in the spring all the fracking time... the sand sets it off and I go to start from a stop sign pulling onto a main road with traffic and f***er makes me go 2 miles and hour cause it slips for a whole .1 seconds on sand and it forces the other cars to brake once I get onto the road cause it WILL NOT let me accel, instead the stupid dash T/C light farts out me with that annoying sound.
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    Re: How Does Traction Control Work?

    So there are different versions then?


    I updated my profile, so it's got all my goods hanging out. :P

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    Re: How Does Traction Control Work?

    Traction Control System (TCS)
    When drive wheel slip is detected while the brake is not applied, the electronic brake control module (EBCM) will enter traction control mode. The traction control system (TCS) controls vehicle traction by applying brakes and limiting engine torque to the drive wheels. The EBCM performs the following TCS operations:

    The EBCM requests the engine control module (ECM) to reduce the amount of torque to the drive wheels via serial data messages.

    The ECM reduces torque to the drive wheels by retarding spark timing and throttle actuator control (TAC).

    The ECM reports the amount torque delivered to the drive wheels via serial data messages.

    The EBCM applies brake pressure to the slipping wheel in order to transfer torque to the gripping wheel.




    Vehicle Stability Enhancement System (VSES)(stabilitrac)
    The vehicle stability enhancement system (VSES) adds an additional level of vehicle control to the electronic brake control module (EBCM).

    Yaw rate is the rate of rotation about the vehicle's vertical axis. The lateral accelerometer measures the sideways acceleration of the vehicle. The VSES is activated when the EBCM determines that the desired yaw rate and lateral forces do not match the actual attitude of the vehicle.

    The desired attitude of the vehicle are calculated from the following inputs:

    The position of the steering wheel

    The speed of the vehicle

    The lateral, or sideways acceleration of the vehicle

    Yaw rate of the vehicle

    Master cylinder brake pressure

    The difference between the desired yaw rate and the actual yaw rate is the yaw rate error, which is a measurement of oversteer or understeer. If the yaw rate error becomes too large, the EBCM attempts to correct the vehicle's yaw motion by applying differential braking to the appropriate wheel. The amount of differential braking applied to the left or right front wheel is based on both the yaw rate error and side slip rate error.

    The VSES activations generally occur during aggressive driving, in turns, or on poor road conditions, without much use of the accelerator pedal. When braking during VSES activation, the pedal pulsations feel different than the ABS pedal pulsations. The brake pedal pulsates at a higher frequency during VSES activation.

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    Re: How Does Traction Control Work?

    I actually like getting it to kick in on a nice wet road with some puddles, To get it a little out of shape and have it correct.


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    Re: How Does Traction Control Work?

    Quote Originally Posted by ahuhn
    Traction Control System (TCS)
    When drive wheel slip is detected while the brake is not applied, the electronic brake control module (EBCM) will enter traction control mode. The traction control system (TCS) controls vehicle traction by applying brakes and limiting engine torque to the drive wheels. The EBCM performs the following TCS operations:

    The EBCM requests the engine control module (ECM) to reduce the amount of torque to the drive wheels via serial data messages.

    The ECM reduces torque to the drive wheels by retarding spark timing and throttle actuator control (TAC).

    The ECM reports the amount torque delivered to the drive wheels via serial data messages.

    The EBCM applies brake pressure to the slipping wheel in order to transfer torque to the gripping wheel.




    Vehicle Stability Enhancement System (VSES)(stabilitrac)
    The vehicle stability enhancement system (VSES) adds an additional level of vehicle control to the electronic brake control module (EBCM).

    Yaw rate is the rate of rotation about the vehicle's vertical axis. The lateral accelerometer measures the sideways acceleration of the vehicle. The VSES is activated when the EBCM determines that the desired yaw rate and lateral forces do not match the actual attitude of the vehicle.

    The desired attitude of the vehicle are calculated from the following inputs:

    The position of the steering wheel

    The speed of the vehicle

    The lateral, or sideways acceleration of the vehicle

    Yaw rate of the vehicle

    Master cylinder brake pressure

    The difference between the desired yaw rate and the actual yaw rate is the yaw rate error, which is a measurement of oversteer or understeer. If the yaw rate error becomes too large, the EBCM attempts to correct the vehicle's yaw motion by applying differential braking to the appropriate wheel. The amount of differential braking applied to the left or right front wheel is based on both the yaw rate error and side slip rate error.

    The VSES activations generally occur during aggressive driving, in turns, or on poor road conditions, without much use of the accelerator pedal. When braking during VSES activation, the pedal pulsations feel different than the ABS pedal pulsations. The brake pedal pulsates at a higher frequency during VSES activation.

    Wow, that dissertation is a yaw...n!

    Sorry, couldn't resist.

    Interesting though, how it works. Because reading what it does and thinking about the sound I hear when it kicks in, it doesn't sound like it's doing anything to the engine. Actually, thinking about it, the sound my car makes when TC kicks in reminds me a lot of the sound a plane makes when the landing gear is raised or lowered.
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  10. #10
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    Re: How Does Traction Control Work?

    I can definitely feel when tc comes on but my car doesn't make any noise

  11. #11
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    Re: How Does Traction Control Work?

    Mine sounds like something is falling off.....................a weird grinding/vibrating noise.

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  12. #12
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    Re: How Does Traction Control Work?

    mine also makes a wierd ass noise when it kicks on especially in the snow it makes the noise loud
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  13. #13
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    Re: How Does Traction Control Work?

    Thanks for the info guys. I think I have the regular traction control, since my car has a "TC" button next to the cigarette lighter in the front.

    Do both versions have the same button?

  14. #14
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    Re: How Does Traction Control Work?

    Quote Originally Posted by Beodude123
    Thanks for the info guys. I think I have the regular traction control, since my car has a "TC" button next to the cigarette lighter in the front.

    Do both versions have the same button?
    Yes. Same button they just work differently. You have the NW7 traction control. I don't know way they don't make the SE and GT the same but they don't.



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  15. #15
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    Re: How Does Traction Control Work?

    Which one is the NW7?

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