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#1
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Subaru Patented Technology
I've been browsing around on www.patentstorm.us searching for patents filed by "Fuji Jukogyo Kabushiki Kaisha" (aka Fuji Heavy Industries, parent company of Subaru) around the time that the SVX was being developed, approx 1988-91.
Many of them come from other branches of FYI, relating to trucks, trains, aircraft etc. But there are some that seem to relate specifically to the SVX. One that particularly caught my attention is 5018594 "Rear-wheel steering system for four-wheel steering vehicle". I reckon this provides probably the best description we will ever find in english for how the 4WS works on the version L. There are several relating to the specific parts of the engine and AWD system and even some relating to "active suspension" and the "anti-frost windscreen" that were supposedly seen on the SVX concept car. Interesting stuff, if only they were a little easier to comprehend.
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Subaru ECU and TCU Website 1992 Alcyone SVX Version L 1992 Alcyone SVX Version L 1994 Alcyone SVX S40-II 2004 Subaru Legacy 2.5 SE Sports Tourer 1996 Subaru Legacy 2.2 GX Wagon 1988 Subaru Justy J12 SL-II |
#2
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Hey Phil...Hunting along your lines gave me this one: http://www.patentstorm.us/patents/se...=fuji+steering
Lays it all out neatly...even if Jinglish is the language of choice. They worked on it for a few years - pity they gave up so easily. Mind you - it took my local service guys three attempts - they were just one tooth out on the rack - before they got it right. It is great to find background info to support the contention that the 4WS SVX is the most nimble vehicle ever made...no arguments. :-) Many thanks.
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Ian "The faster I go...the older I get" Last edited by nutshell; 01-31-2008 at 06:04 AM. |
#3
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Nice work! The second one on your list gives some clues about how to recalibrate the steering angle sensor after the steering rack has been worked on.
5065324 Method of detecting absolute steering angle of steering angle sensor for vehicle Quote:
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Subaru ECU and TCU Website 1992 Alcyone SVX Version L 1992 Alcyone SVX Version L 1994 Alcyone SVX S40-II 2004 Subaru Legacy 2.5 SE Sports Tourer 1996 Subaru Legacy 2.2 GX Wagon 1988 Subaru Justy J12 SL-II |
#4
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Did any USDM cars see active or passive 4WS?
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#5
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no
From what I have read no, but would have been nice to have.
Max |
#6
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That's a can of worms that has been opened many times, just search for it.
Hello Eddycat? Aredub?
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I'm like a Slinky.. Not really good for anything, but you can't help but smile when you see me tumble down the stairs. http://stickyvinylgraphics.com/ |
#7
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My SVX has passive 4WS
We all do... This hasn't been debated for a while...
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Dave - 03 Baja - 92 SVX - 86 Brat - 08 OB 3.0 |
#8
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Quote:
So passive 4ws for USDM and active for JDM? Any way to add active 4ws without spending $10k? |
#9
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Quote:
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#10
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Yes. In the sense that "passive 4WS" is a marketing term meaning "2WS".
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Subaru ECU and TCU Website 1992 Alcyone SVX Version L 1992 Alcyone SVX Version L 1994 Alcyone SVX S40-II 2004 Subaru Legacy 2.5 SE Sports Tourer 1996 Subaru Legacy 2.2 GX Wagon 1988 Subaru Justy J12 SL-II |
#11
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Absolutely spot on.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#12
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A couple Nissans in the early 90's came with Super HICAS 4 wheel steering, and I believe most people with it hate it and remove it. Wonder how it's different, aside from being on a more powerful AWD car.
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#13
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IIRC the Super HIcas setup was a hydraulic cylinder that moved the rear subframe. The system on the Stealth/3000GT was similar
Honda's was a pure mechanical system, with a shaft running to the back, which had it's own rack & pinion. The SVX system, which is well detaled elsewhere, was an electric system with a motor that moved the "toe" links via a bell crank. Personally I'm sort of glad we did without 4ws. The added complexity & weight would be a downer on a higher mileage car.
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[SIGPIC]http://www.subaru-svx.net/forum/image.php?type=sigpic&userid=5569&dateline=1207440 507[/SIGPIC] Naught but by the grace of God "42" Current Stable By Age:'89 Subaru XT6 Silver "Audrey" as in Hepburn '96 SVX LSi #767Brilliant Red "Lil Red" Now on the front burner. Looking for a totalled, but running parts car. |
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