Agera RS Transmission

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Sierra117
23
Joined: 08 Oct 2017, 10:19
Location: New Zealand

Agera RS Transmission

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Anybody watched the vid of the Agera setting the speed record? My brother and I noticed something and I'm hoping someone can give some possible explanations - if you listen closely, you'll notice that when the car changes gears, it sounds like a normal manual transmission - the delay sounds exactly like someone pressing a clutch and changing gears. I'm not formally educated in engineering so it would be nice to know.
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hurril
hurril
54
Joined: 07 Oct 2014, 13:02

Re: Agera RS Transmission

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It does change gear pretty slowly.

NoDivergence
NoDivergence
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Joined: 02 Feb 2011, 01:52

Re: Agera RS Transmission

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Sierra117 wrote:
17 Nov 2017, 19:32
Anybody watched the vid of the Agera setting the speed record? My brother and I noticed something and I'm hoping someone can give some possible explanations - if you listen closely, you'll notice that when the car changes gears, it sounds like a normal manual transmission - the delay sounds exactly like someone pressing a clutch and changing gears. I'm not formally educated in engineering so it would be nice to know.
They use a single clutch gearbox. At this power level and with this much torque, they don't want to slam the shift to protect the gearbox components.

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Sierra117
23
Joined: 08 Oct 2017, 10:19
Location: New Zealand

Re: Agera RS Transmission

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NoDivergence wrote:
17 Nov 2017, 21:25
Sierra117 wrote:
17 Nov 2017, 19:32
Anybody watched the vid of the Agera setting the speed record? My brother and I noticed something and I'm hoping someone can give some possible explanations - if you listen closely, you'll notice that when the car changes gears, it sounds like a normal manual transmission - the delay sounds exactly like someone pressing a clutch and changing gears. I'm not formally educated in engineering so it would be nice to know.
They use a single clutch gearbox. At this power level and with this much torque, they don't want to slam the shift to protect the gearbox components.
But the Agera RS uses a dual-clutch system, no? Though your explanation makes sense regardless!
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sosic2121
sosic2121
13
Joined: 08 Jun 2016, 12:14

Re: Agera RS Transmission

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Sierra117 wrote:
18 Nov 2017, 08:00
But the Agera RS uses a dual-clutch system, no? Though your explanation makes sense regardless!
They don't use "real" dual clutch gearbox.

"The Cima 7-speed gearbox is another new item. It is basically an automated manual, but it incorporates an additional wet clutch-brake to slow down the input shaft during upshifts. This speeds up rev-matching hence gearshifts. Trickily, Koenigsegg calls it a dual-clutch transmission."
I copied this from autozine.org

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Sierra117
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Joined: 08 Oct 2017, 10:19
Location: New Zealand

Re: Agera RS Transmission

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Ah, so the delay is for rev-matching. Thanks everyone.
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NL_Fer
NL_Fer
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Joined: 15 Jun 2014, 09:48

Re: Agera RS Transmission

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So upshifting is apply the clutch and apply the torque brake. But how does it upshift? Blip throttle and apply clutch?