Unusual ways to change gear (cont'd)

"Cé hé sin" (michael-m-mouse) 03/06/2019 at 15:40 • Filed to: Koenigsegg Jesko

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This is a Koenigsegg Jesko.

It’s a Koenigsegg, so it’s very fast, very expensive, has fancy doors and you’re unlikely ever to see one.

Also, being a Koenigsegg, it has things that are unusual and interesting. One of these is the nine speed gearbox, which has six gears.

You what? Yes, it’s a six speed nine speed. As explained by Herr* von Koenigsegg, it’s a bit like a dérailleur gear set on a bike. This can have two or three chain wheels at the pedal end and rather more at the wheel end. These work in combination so three front and six rear wheels give you 6x3 or 18 gears.

The Koenigsegg LST in the Jesko works in a somewhat similar manner in that ha s two sets of gears which interact with each other. Here’s a picture.

It’s not terribly clear but the box has three shafts. One is the input shaft, one is the output and finally there’s an intermediate shaft which has six gears. Three of these mesh with three wheels on the input and the other three with the same number on the output. Each of these six pairs has a multiplate clutch to connect it to a shaft - much like a conventional gearbox but with synchromesh cones and dog teeth replaced by clutches.

Power goes to the input shaft, is transferred to the intermediate shaft by whichever of the three gearsets has its clutch engaged and goes from there to the output shaft by one of the remaining three gearsets. There are three choices in each case so 3x3=9 speeds.

Want to head astern? You’ll be needing the seventh clutch and its associated reverse gear.

To proceed manually in your Jesko, you just push or pull this lever and the next speed up or down is engaged in a small number of milliseconds. To request the electronics to choose their own gear, you just move the lever (or paddle as desired) one step further.

* yes, they use Herr in Sweden too.

chaozbandit > Cé hé sin 03/06/2019 at 15:46

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Covered briefly in moving picture here

Snuze: Needs another Swede > Cé hé sin 03/06/2019 at 15:46

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Whats really weird and Koenigsegg about this is that there appear to be fuel injectors in the transmission...

and 100 more > chaozbandit 03/06/2019 at 16:06

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Couldn’t get past the nipples. However:

One:1 development - We made the perfect car, it only needs one gear!

Jesko development - We made the perfect car, it has two transmissions stuck together!

JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t > Cé hé sin 03/06/2019 at 16:10

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I fucking love the nutty bastards at Koenigsegg.

Christian: “ What if cost were *zero* object, and we didn’t feel chained to tradition or our existing suppliers and legacy engeneering knowledge? “

Transmission Guy: “ Well, when you put it that way... There' s this idea I’ ve been kicking arround...”

Cash Rewards > Snuze: Needs another Swede 03/06/2019 at 16:19

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Yours doesn't have that?

Bob Loblaw Made Me Make a Phoney Phone Call to Edward Rooney > Cé hé sin 03/06/2019 at 16:22

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Rednecks across America are wondering what the big deal is!

Distraxi's idea of perfection is a Jagroen > and 100 more 03/06/2019 at 16:23

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“ The test of a first-rate intelligence is  the ability to hold two opposed ideas in mind at the same time and still retain the ability to function.”

- F. Scott Fitzgerald

Snuze: Needs another Swede > Cash Rewards 03/06/2019 at 16:31

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No, still carbureted.

Saracen > Cé hé sin 03/06/2019 at 16:32

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I love Koenigsegg.

Yowen - not necessarily not spaghetti and meatballs > Cash Rewards 03/06/2019 at 16:55

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I prefer mine with indirect injection.

Yowen - not necessarily not spaghetti and meatballs > Cé hé sin 03/06/2019 at 16:56

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So is this for the sake of being different or is there a distinct advantage to this setup?

BoxerFanatic, troublesome iconoclast. > chaozbandit 03/06/2019 at 17:02

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insanely incredible stuff.

Engineering geek nirvana, there.

I want to see McLaren and Koeniggsegg in a supercar build-off reality show.

Cé hé sin > Snuze: Needs another Swede 03/06/2019 at 17:17

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Those are for the clutch actuators. Eight in total, seven clutches and the differential.

Cé hé sin > Yowen - not necessarily not spaghetti and meatballs 03/06/2019 at 17:20

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Yes and yes. The theory is that the box can change rapidly between any of the gears whereas a DCT can only easily change quickly between two sequential gears.

Nick- Professional Car Destroyer > Cé hé sin 03/06/2019 at 17:35

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I love Konigsegg. They definitely have a lot of innovation as far as drivetrains go. This could be give huge advantages to future transmissions in hyper cars, and maybe even street cars in due time.

JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t > Yowen - not necessarily not spaghetti and meatballs 03/06/2019 at 17:49

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What Cé hé sin said, it' s also really co mpact for the torque capacity vs. A traditional DCT

StndIbnz, Drives a MSRT8 > Cé hé sin 03/06/2019 at 19:00

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I love this as it’s a nice mix of DCT and traditional auto box.  In an auto, you can skip gears down as long as the clutches are used in the same gear, but a DCT has to go 1 at a time.  Really good new feature we may be seeing more of in the future.

Spamfeller Loves Nazi Clicks > Yowen - not necessarily not spaghetti and meatballs 03/06/2019 at 20:26

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It’s got a LOT of advantages. None of them have to do with cost or serviceability.

One, it’s a non-sequential design. You can shift 1->9->4->2->6->3. Anything ‘dual clutch’ can only go a single gear forward or back, and only odd-even. Meaning 1->2, never 1->3.

Two, MOAR CLUTCH. Clutch is what makes the transmission ... transmit. Friction materials matter in both material and size. Your automatic transmission has tiny little clutchpacks which they have to stack up and use fancy materials on. Your manual transmission does NOT necessarily h ave a larger friction area necessarily; it’s just a single friction plane and much cheaper materials.
This motherfucker has enough friction area to carpet your bedroom in, well, it’s C andycornl eg, so probably titanium plates with industrial diamonds and wrapped in carbon nanofilament or something similarly batshit.

No, seriously. This thing has EIGHT GOD DAMN CLUTCHES, each of which is the size of an angry polar bear .

And then there’s the hydraulics. Oh god, the hydraulics are already making me weep in terror. Your automatic has, at most, five or six solenoids. A solenoid can only handle so much pressure, can only do so much pressure rise and fall, etcetera. Baconeggsandwich put like THIRTY-TWO solenoids just on the outside . Those aren’t ‘actuators’, they’re solenoids to route hydraulics. And if you learn anything about hydraulics today, learn this: MOAR PRESSURE = MOAR POWER.

Oh, but we’re not done yet! No, because this is Kernelsmeg. Noooo, we gotta fuck all the shit up forever . Because this thing has EIGHT DAMN CLUTCHES this also means that it can change gears faster than an F1 transmission. No, I am not on drugs or high. This thing can engage any gear it wants as fast as it can activate any two clutches. Or three. Or nine, because Herr vroomvroom Karmaflag probably rightly realized if he actually explained how many clutches there actually were, your head would literally explode. So he just said “it’s just 8 instead of 2.”

Conclusion: Jesko is Swedish for “ because fuck you, that’s why. ”

You can tell a Finn but you can't tell him much > chaozbandit 03/07/2019 at 08:11

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I love when he’s talking about redesigning the heads to improve flow and he casually throws in “and we made the heads stiffer and lighter” like someone had a spare ten minutes on Tuesday and figured what the hell, lets do this.

Snuze: Needs another Swede > Cé hé sin 03/07/2019 at 12:26

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After I stared at it for a bit I figured it was something like that.  But I swear they look like giant port fuel injectors, and now I can’t unsee that.  

Yowen - not necessarily not spaghetti and meatballs > Cé hé sin 03/07/2019 at 12:51

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Haha got it! That’s the thing I was looking for, the advantage of essentially being able to skip gears when appropriate seems like a good one.

Yowen - not necessarily not spaghetti and meatballs > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t 03/07/2019 at 12:51

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ah neat! Thanks.

Yowen - not necessarily not spaghetti and meatballs > Spamfeller Loves Nazi Clicks 03/07/2019 at 13:35

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Haha thanks for this! I’m now  interested in having a bedroom done in Kernserssrnutmeg clutch material. What do you reckon, about $26,999 per sqft?

Spamfeller Loves Nazi Clicks > Yowen - not necessarily not spaghetti and meatballs 03/07/2019 at 14:38

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Well, given it’s Knessetfig and they probably developed it in house, that’s probably the square-inch price.

Yowen - not necessarily not spaghetti and meatballs > Spamfeller Loves Nazi Clicks 03/07/2019 at 14:47

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What’s knessetfig? A rare plant that blooms only once every 38 years?

BoxerFanatic, troublesome iconoclast. > Cé hé sin 03/07/2019 at 20:01

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Is it wrong that I want a big curved wing mounted from the top side by long horizontal supports on a more affordable car?

There has to be a kit for that to be put on a used  Lotus Evora or something....

BoxerFanatic, troublesome iconoclast. > and 100 more 03/08/2019 at 10:17

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Actually:

One:1 - We made the perfect car, it makes 1 horsepower per kilogram, and 1 megawatt of output!

Agera RS: - we made the perfect car. It makes even MORE power, has even MORE aero downforce, and set a world record for the fastest production car on a public road.

Regera: - We made the perfect car. It doesn’t have a transmission, just two electric traction motors, a third motor on the engine crankshaft for low-RPM added torque, and electrical generation, and as a starter, and it uses a giant, optimized lockup torque converter to progressively engage the 1500 horsepower V8 with the final drive, and the axle motors.

Jesko: We made the perfect car. It has even MORE POWER, with new cylinder heads, giant turbos with air injection anti-lag, a featherweight flat-plane crankshaft, and no flywheel. It uses the input shaft and gear set for inertia to stay running. The gearbox as three shafts, with three gears each, with 7 solenoid activated clutches to be lighter, shorter, stronger, and quicker than any 7-ratio dual-clutch could possibly be, and 9 possible combinations of ratios, plus reverse. And an 8th solenoid for the electronic rear differential. It has more aero than one:1 and Agera RS, so much that it requ ires a central damper and spring set between the outer dampers and springs, to allow for the tremendous downforce at high speeds... both at the front and the back. I t has a streamlined body like Regera, plus it is 14mm longer for better cabin space, and due to the wheelbase extension, also has rear steering assist.

Future: We made the perfect car. it is the co mbination between a sports car, an aircraft, a hydrofoil, a hovercraft, and it has a new on-board teleportation device. You can get anywhere, instantly.

and 100 more > BoxerFanatic, troublesome iconoclast. 03/08/2019 at 11:05

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Basically, “Fuck whatever you think a car is, try this instead.”