The Koenigsegg Jesko is too good for dual-clutch. It’s too good for three clutches, or four or five or six. No, the Jesko’s transmission has seven clutches, in an effort to make the time between gear shifts as minimal as possible, among other uses. Here’s how that works.
To be honest, I don’t fully understand this video, even after watching it several times. But here’s a bit more from Christian Koenigsegg himself, via Road and Track:
In many ways, it’s very simple. We have eight actuators, and eight pressure sensors. One for each hydraulic clutch. There are seven clutches, but there’s an eighth for the electronic differential. We carry that over from the Agera RS. And then there’s one actuator for reverse, and six for the forward gears, on three shafts. So, two clutches per shaft. That makes it possible to mix and match three gears in pairs.
What does all of this mean, in real terms? It means that you’ll be able to shift to any gear you want, from any gear, something not possible on a lot of dual-clutch transmissions, many of which only allow you to shift sequentially. If you’re cruising along in eighth gear, for example, but you want to quickly accelerate, you’re free to skip right to third or fourth gear, and zoom away, unlike with dual-clutch, in which you must tediously shift to seventh gear, then sixth, then fifth, etc.
And that has to do with all those clutches, since they are free to keep every gear in the nine-speed gearbox ready for use. Koenigsegg has also somehow done this and kept the weight to around 200 pounds, or nearly half of what a traditional dual-clutch weighs, it said.
The shifting setup is also interesting, via Koenigsegg:
Gearshifts are via either steering wheel paddles or the manual-style shifter located in the traditional central position. Both the paddles and shifter feature a double-notch shifting mechanism. The first notch shifts one gear up or down. Advancing to the second notch engages Ultimate Power on Demand – shifting the car to the optimum gear for maximum acceleration, regardless of that gear’s relationship to the current gear – instantly.
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This transmission will definitely be a cheap and easy fix when something inevitably goes wrong.
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