Table of contents
- Technology exhaust flaps It just doesn’t work
- Ducati takes the trickery to extremes
- No Panigale customer has complained
- Noise measurement
www.jkuenstle.de
7th pictures
Unger
1/7
After the tourist faction is well represented in the long-term test fleet with the Triumph Trophy and BMW GS, the Ducati Panigale is finally back as a real athlete.
Jelicic
2/7
Role-playing games: The test machine turned out to be extremely powerful.
Hertler
3/7
Better safe than sorry: the motor has already been sealed – as is usual in the endurance test.
Hertler
4/7
Hot goods: Despite the heat protection, the Panigale heats up the driver a lot.
Bilski
5/7
Spectacular debut: Right at the beginning of the endurance test, the Panigale had to show the audience what it could do on the brakes.
6/7
The test machine marches bravely very early on. Let’s see if it develops a little more pressure with the kilometers.
7/7
counselor
workshop
Technology exhaust flaps
Technology exhaust flaps
It just doesn’t work
Electrically operated exhaust flaps are primarily used today to achieve high peak performance, despite stricter noise limits. But some manufacturers overdo it.
Gert Thole
01/30/2014
Exup (exhaust ultimate power valve) was the name Yamaha gave to the first system with a flap in the exhaust, which debuted in the FZR 1000 Exup in 1989. The purpose was to optimize the torque curve in the lower and middle speed range through targeted interventions in the exhaust gas flow. Today the justifications for electrically operated exhaust flaps often sound similar. In reality, it is more about getting the highest possible peak performance despite stricter noise limits – and probably also more sound as a sales argument. To do this, the flaps usually open according to the speed and / or load status.
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It just doesn’t work
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Sometimes, however, the flaps are also used quite banally to clog the exhaust exclusively for noise measurement. This can be observed particularly with Italian manufacturers. In the first versions of the Aprilia RSV4 R, for example, the flap only closed digitally at low revs and speeds. Exactly where the homologation takes place. Which means that the athlete otherwise throws his V4 sound barely muffled into the airwaves. Some may be enthusiastic about this, others – especially outsiders – find the high noise level rather annoying.
Motorsport
IDM Supersport 600 (2018)
The starting field is filling up
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Enduro
Autumn trip 2013 with the endurance test motorcycles
Cell phone off, engine on, departure!
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Ducati takes the trickery to extremes
Ducati takes the trickery at the Panigale to the extreme. Even with the first test machines it was noticeable that at constant speed at around 50 km / h they suddenly switched from roaring loud to dull gasping. Just when the electronics suspected a measurement and shut the exhaust. As a reminder: The driving noise is measured by accelerating the motorcycle in second and third gear from constant speed at exactly 50 km / h on a 20-meter-long measurement section at full throttle.
With newer Ducati test machines, it was noticeable that the flap obviously no longer closed in everyday life. The Panigale was just always roaring loud. When the opportunity arose as part of a larger exhaust test, MOTORRAD made a measurement with the Panigale 1199 and 899 test machines. The values shown in the table were determined.
Super athlete
Ducati 899 Panigale in the driving report
When reason is fun
read more
Super athlete
Ducati 899 Panigale in the PS driving report
Waiver? Only on the single-sided swing arm
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No Panigale customer has complained
As a reminder: The limit value for the driving noise is 80 dB, 79 dB is homologated for both models. Ten dB more corresponds to ten times the sound intensity and is subjectively perceived as twice as loud. Despite many attempts, it was not even possible to get the flaps to close. According to Ducati the flaps should actually work when operated correctly. Technicians from the factory reported that it depends on the speed of rotation of the throttle grip when opening. Maybe we were too slow on the gas?
Not really matter. Because the example shows how far this flap trickery is from reality. Only in this way is it possible to get such a loud motorcycle on the road. Incidentally, there are obviously no complaints from customers. Press spokesman Andreas Holzer: “None of our Panigale customers have complained about a too loud exhaust noise.” But the flap trick won’t work for a long time anyway. In the next stage of the noise regulations, these will probably be banned, so newly homologated machines will have to become quieter in a few years. Interestingly, the stationary noise, for which there is no limit value, is below the very high homologated value on both test machines.
Noise measurement
| Ducati 899 Panigale | Ducati 1199 Panigale | |||
| Setpoint | actual value | Setpoint | actual value | |
| 2nd gear | 79 dB (A) | 97.6 dB (A) | 79 dB (A) | 95 dB (A) |
| 3rd gear | 79 dB (A) | 93.7 dB (A) | 79 dB (A) | 93.4 dB (A) |
| Standing noise | 108 dB (A) | 106 dB (A) | 104 dB (A) | 104 dB (A) |
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