Has anyone converted an X100 to electric steering?
#1
Has anyone converted an X100 to electric steering?
The default on the X100 at loss of traction is to cut power (down to 300 rpm's or so). This cut makes it impossible to steer even if you are in the power.
HAS ANYONE CONVERTED FROM ENGINE POWERED POWER STEERING TO ELECTRICLY DRIVEN POWER STEERING?
HELP
Wayne
HAS ANYONE CONVERTED FROM ENGINE POWERED POWER STEERING TO ELECTRICLY DRIVEN POWER STEERING?
HELP
Wayne
Last edited by GGG; 08-14-2016 at 08:49 AM. Reason: Remove font codes from thread title
#2
Well, this is not what you are asking, but the stock steering has a mechanical component (hydraulic pressure generated by a pump on a belt), as well as an electrical component for control. My understanding is that the power assist is maximized at low speed (say, to make it easier to park the car), and minimized at higher speed for a more firm feel. In other words, I believe the assist is based on vehicle speed (as opposed to RPM).
First, you might want to check that your variable assist works as intended. It would not hurt to check the basics of the hydraulic circuit either, I suppose.
Also, a forum member grew unhappy with the "response curve" as provided by Jaguar, and created a smart controller that was able to generate an (adjustable) alternative electric signal to the steering assist based on a response curve of his choosing. I suppose you could look into that project and come up with your own design. Check here: servo-assistance-control-147084/
FWIW, if a power steering in working order can _comfortably_ steer a car nearly at rest, the hydraulic system provides more than enough assistance.
Best of luck, keep us posted.
First, you might want to check that your variable assist works as intended. It would not hurt to check the basics of the hydraulic circuit either, I suppose.
Also, a forum member grew unhappy with the "response curve" as provided by Jaguar, and created a smart controller that was able to generate an (adjustable) alternative electric signal to the steering assist based on a response curve of his choosing. I suppose you could look into that project and come up with your own design. Check here: servo-assistance-control-147084/
FWIW, if a power steering in working order can _comfortably_ steer a car nearly at rest, the hydraulic system provides more than enough assistance.
Best of luck, keep us posted.
Last edited by fmertz; 08-11-2016 at 08:56 AM.
#3
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I'm a little curious as to what you're doing with your car that's causing it to lose traction to this degree. Separate from that, the steering should not be noticeably difficult even with the DSC fully engaged.
#4
#5
Ok, now what happened was;
Right hand turn from a stop when cold and misting.
Brand new really wide reflective crosswalk paint.
Spin...trying to turn into spin, the car fought me, the wheel felt welded.
The engine spun up, the wheel spun WAY TOO EASILY.
I OVERCORECTED.
THEN FACED THE EXACT SAME PROBLEM!
By this time I was across three lanes and could not avoid an accident that should never have occurred!
THAT IS WHY THE THOUGHTS ON ELECTRIC STEERING CONVERSION. For the record manual steering would have avoided the whole incident. I am THAT GOOD A DRIVER!
Right hand turn from a stop when cold and misting.
Brand new really wide reflective crosswalk paint.
Spin...trying to turn into spin, the car fought me, the wheel felt welded.
The engine spun up, the wheel spun WAY TOO EASILY.
I OVERCORECTED.
THEN FACED THE EXACT SAME PROBLEM!
By this time I was across three lanes and could not avoid an accident that should never have occurred!
THAT IS WHY THE THOUGHTS ON ELECTRIC STEERING CONVERSION. For the record manual steering would have avoided the whole incident. I am THAT GOOD A DRIVER!
#6
#9
#10
#11
Guys, it was a low throttle 90 degree right hand turn. Very low throttle. The stability control seems to have gone whacko!
The tires (tires and wheels have been changed to Michelin Pilot Super Sports. Have plenty of grip in the rain) were the ones that came with the car when I bought it used in Sarasota. They were admittedly hard (wear factor 550) and bought to last for an exec to drive the car. I go to track days and have spun before. But this was a very different experience.
I wasn't driving aggressively, in fact I was sorta tip-toeing around because of the FIRST LIGHT RAIN IN MANY MONTHS! I have raced both cars and bikes in the rain, this was NOT THAT!
The tires (tires and wheels have been changed to Michelin Pilot Super Sports. Have plenty of grip in the rain) were the ones that came with the car when I bought it used in Sarasota. They were admittedly hard (wear factor 550) and bought to last for an exec to drive the car. I go to track days and have spun before. But this was a very different experience.
I wasn't driving aggressively, in fact I was sorta tip-toeing around because of the FIRST LIGHT RAIN IN MANY MONTHS! I have raced both cars and bikes in the rain, this was NOT THAT!
#12
Guys, it was a low throttle 90 degree right hand turn. Very low throttle. The stability control seems to have gone whacko!
The tires (tires and wheels have been changed to Michelin Pilot Super Sports. Have plenty of grip in the rain) were the ones that came with the car when I bought it used in Sarasota. They were admittedly hard (wear factor 550) and bought to last for an exec to drive the car. I go to track days and have spun before. But this was a very different experience.
I wasn't driving aggressively, in fact I was sorta tip-toeing around because of the FIRST LIGHT RAIN IN MANY MONTHS! I have raced both cars and bikes in the rain, this was NOT THAT!
The tires (tires and wheels have been changed to Michelin Pilot Super Sports. Have plenty of grip in the rain) were the ones that came with the car when I bought it used in Sarasota. They were admittedly hard (wear factor 550) and bought to last for an exec to drive the car. I go to track days and have spun before. But this was a very different experience.
I wasn't driving aggressively, in fact I was sorta tip-toeing around because of the FIRST LIGHT RAIN IN MANY MONTHS! I have raced both cars and bikes in the rain, this was NOT THAT!
If the tyres are too old or too hard there is no grip,
buy new tyres and don´t think about electric steering.
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kulddy (10-16-2016)
#13
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Never have I had a car's steering react like you claim. Even when the DSC light is flashing like a disco, power steering is unaffected.
Why not go to a skid pad and see if ou can recreate the issue.
#14
I would check the wheel well liners, as well as all the plastic underbelly components. Try an imagine a situation where water would soak the belt. Check the belt for contamination, too, like greasy residue (possibly off of a leaky water pump bearing), anything that could be made more slippery with water. Take the belt off and check if any of the accessories is binding (this would cause the belt to slip and cut off steering assistance) by turning them by hand.
Also, check the front suspension for any type of binding. Are your upper mounts badly collapsed? Do you have lowering springs? Are your tie rods possibly touching anything at high steering angle and high load?
Just my thoughts. Best of luck, keep us posted.
#18
Thanks, the new tires and wheels stick just fine (SS's).
Current problem; fans not working A/C not working. Have replaced Fan Control Module last year. I happen to have another. But as of now the only set of keys got locked into trunk.
IDEAS ANYONE?
Current problem; fans not working A/C not working. Have replaced Fan Control Module last year. I happen to have another. But as of now the only set of keys got locked into trunk.
IDEAS ANYONE?
Last edited by kulddy; 10-16-2016 at 10:57 AM. Reason: New problem.
#19
I went through an intersection in my XJR and experienced hard steering and alternator issue for a couple of minutes. I have had the DSC engage in my XKR during a light mist. It nearly put me through the windshield. Note to self, if there is any chance of tire spin , turn DSC off !!
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kulddy (10-16-2016)
#20