Agera RS Transmission

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Sierra117
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Joined: Sun Oct 08, 2017 9:19 am
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
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Joined: Tue Oct 07, 2014 12:02 pm

Re: Agera RS Transmission

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It does change gear pretty slowly.

NoDivergence
NoDivergence
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Joined: Wed Feb 02, 2011 12:52 am

Re: Agera RS Transmission

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Sierra117 wrote:
Fri Nov 17, 2017 6:32 pm
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
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Joined: Sun Oct 08, 2017 9:19 am
Location: New Zealand

Re: Agera RS Transmission

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NoDivergence wrote:
Fri Nov 17, 2017 8:25 pm
Sierra117 wrote:
Fri Nov 17, 2017 6:32 pm
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
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Joined: Wed Jun 08, 2016 11:14 am

Re: Agera RS Transmission

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Sierra117 wrote:
Sat Nov 18, 2017 7:00 am
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: Sun Oct 08, 2017 9:19 am
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: Sun Jun 15, 2014 8:48 am

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?