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bob

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  1. I'll do what I can to push for this but there is no shortage of work for engineering team so a lot of items do have to wait. Simon the problem is this excuse has been used for a year or more. The real truth is the belief that there is nothing wrong, and Ray Hall does not know what he is talking about. In the past the company listened to anything I said and requested. My knowledge and that of Scott and Insight Motorsports took the Link product to what it is now. I have not suddenly lost my knowledge and experience. The truth is... Link management has changed and the good experienced engineers are also gone. I also had Andy (Manager) ask me who I was when I sent him an email. I explained I was one of his dealers and that in the past my purchases from Link was over $1,000,000 a year and had over 120 dealers around the world. Meant nothing to him, and ignored my request to fix faults in the Link product. He actually told me that only dealers with high sales now are taken as creditable. I am now putting requests to fix things that do not work correctly on this forum in hope something will be done to fix faults I have been banging on about for a long time. I gave up on getting the traction control to be fixed so it was performance rather then safety traction control. I made my own controller based on the Autronic which works very well.
  2. Simon, Here is the data log and the map. Ray. GT86_V6_36L_ver3.pclr CruiseControlOvershoot.llg
  3. Simon, The problem is stalling or almost stalling. To make the closed loop work correctly I found that it hits the target rpm everytime, with zero for the PID and in the stall saver. By putting zero in the PID you are making it open loop. Add even a small amount of Proportional so the PID does something and it wants to stall. See attached logs and map. Ray. P.S. I Challange you or anyone to post their map and data loggs showing it working correctly with more then zero in the Proportional. GT86_V6_36L_ver2.pclr IdleControlClosedLoop.llg IdleControlOpenLoop.llg
  4. On the 26th of May 2011 I had Robert from Riva Racing send me this email. --------------------------------------- I just installed 4.7 and noticed that Closed Loop Idle Control was not available yet for E-throttle. Just curious, are you still testing it? Robert Crain Research & Development Riva Racing --------------------------------------- From Stephen the head engineer at the time Ray, Its almost finished, its just I don't drive the car very often so development is slow. As you know this needs to be tested on the road and not on the bench. Craig has directed me to get user CAN finished but I'll try and get a pre-release version to you before the end of the year. Stephen -----------------------------------------. From Ashley on the 19th of Spetember 2011 Hi Ray, Would you be interested in testing closed loop ethrottle idle control? Trying to find as many vehicles to test it on to see if it needs more work or not. -- Regards Ashley Duncan Unfortunately I did not have a car at the time that I could use to test the closed loop e-thottle. ------------------------------------------ 22nd January 2016 I finaly had a car I could test it on and found it did not work correctly, so sent Ashley an email. This was the reply. Hi Ray, I actually don't know how that idle ethrottle control works. I haven't looked before. I did make the speed lockout adjustable the other day and noticed that there are some conditions are 0 kph, some at 2kph, one at 8 kph and one at 10 kph. I think the ethrottle idle control is actually not very good at all and have it at high priority to spend some time on. Stephen did it quickly for his own car and never really finished it before leaving. Ashley Duncan Engineering Team Leader ------------------------------------------ As you can see from the above, the closed loop e-throttle control has never worked.I have asked many time since then for it to be fixed and nothing has been done. The closed loop e-throttle control has never worked. For six years it has not worked correctly...
  5. The cruise control overshoots the set speed. This is very obvious on a car with a large amount of torque. There is a Max Acceleration (kph per Second) settings that does nothing. This may be the solution to the problem, if Link would make the effort to fix it. I reported this problem on the 16th of June 2016 and supplied data logs to show the problem. See emails below. Despite asking many times in the last 11 months when will it be fixed nothing has been done. ---------------------- Emails ---------------------------- The Cruise control needs more work. It overshoots on the resume setting. Example I have the set speed as 60 kph. I then touch the brake and slow the car to 50kph. When I select resume the car accelerates to 65kph before is slows down to 60kph. Changing the Derivative does not stop the overshoot. For the control to be smooth, and not cause excessive fuel consumption it needs to be a lot smother. It should slow down the acceleration as it get close to the set point. ------------------------------------------------- Hi Ray If you can gather some logs of both cases along with the PCL file I'll have Engineering take a look at it. It will be a fresh set of eyes looking at it now with the departure of Ashley which can bring a fresh approach. Simon ---------------------------------------------------- 17/06/2016 Got the engineering team on to it now with all the provided info. SImon -------------------------------------------------------
  6. bob

    Traction Control

    This is a potlical reply I expected. "We feel we have a working and effective traction control". "We endeavor to take all feedback onboard. But with all things tasks have to be prioritized". The truth is the traction control is even worst then what I stated. It is only effective if you have the same road traction conditions. If you are on road with less traction your settings do not work the same. The Autronic will always give you the slip threshold no matter how the traction conditions change. If the Link/Vipec was an "effective" safety traction control it would give you consistent results. It does not. It is unsafe, and I would not rely on it. I will make some logs to show just how "ineffective" the traction control is.
  7. bob

    Traction Control

    I have just spent a few days trying to get the traction control to work as I expected it to work. I have found the traction control is not for performance and is for safety. If you are like me, I fit a aftermarket ECU as I want my engine to make more power and car to accelerate faster. There are two types of traction control safety and performance. Factory traction control which is found on many cars is the safety type. This is why most people are not interested in traction control as they do not see it as a performance advantage. I have a lot of experience with performance traction control. Once you have experienced this type you are a believer. My experience comes from using the Autronic traction control, which was developed with the assistance of Larry Perkins for the V8 Supercars in the late 1980's. It was eventually banned due to the advantage it gave. I have asked that the Link/Vipec traction control to be fixed so it is the performance type, but have found no one in management is interested as they have more important things to do. I am hopping others will add to this request. I will give you an example as to why the traction control does not make the car accelerate as fast as possible.. The way the Link/Vipec works is to rely heavily on ignition retard to reduce power to reduce wheel spin. It also will cut injectors, but from the "recommended" settings the only three cylinders would be cut on a six cylinder. The Autronic uses injector cut from one to maximum cylinders. It also warns you not to use ignition retard with turbocharged engines, as turbocharger and engine damage could occur. Very true fact... The recommended settings given to me for the Link/Vipec are, Ignition Retard Start -5 deg Ignition Retard End -20 deg Injector Cut Start 0% Injector Cut End 40% Proportional Gain 5 Integral Gain 0.3984 Derivative Gain 0 The Autronic has just two settings. These are slip threshold and control range. There is one of these for every gear. There are no other settings to tune. Slip Threshold : Percentage of allowable wheel slip before traction control commences reduction of engine power. Control Range: Engine power will be reduced progressively over this slip range until all power is cut at range limit. Slip threshold is the secret to performance traction control. Example, We have two cars, both the same except for the ECU. One has Autronic the other Link/Vipec. The Autronic has a slip threshold of 6% and a control range of 4%. Total of 10% slip. The Link/Vipec has 10% in the sip table. We are on a road where the bitumen gives us a 6% slip. The car with the Autronic is at full power and accelerating. The car with the Link/Vipec has applied at least -5 deg retard and cut at least one cylinder. The car with the Autronic is making full power and putting all of it on the road. The Vipec is trying to deal with 6% slip and killing the power. Even if the slip was 10% the Autronic is providing 6% less slip. The Autronic works to give the maximum acceleration. The Link/Vipec works to stop the wheel spin at the cost of acceleration.
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