Friday, February 12, 2021 – 19:23
Launched in May 2019, Irizar’s revolutionary Nemo electric bus is experiencing a series of failures. Keolis, manager of the Ametis network, is under pressure, not to mention Amiens Métropole, which has invested 156 million euros in the largest electric fleet in Europe.
This Friday, December 12, 33 Nemo remained in the parking lot of the bus depot in Rivery. It’s better than Thursday when 40 Nemos were left at the depot, 37 on Wednesday. – (Photos: FRED HASLIN)
For this project, Amiens Métropole has invested 156 million euros: 35 for buses, 20 for the depot and 101 in roads, networks, red lights, operating systems and other recharging.
Ten Nemos are rolling this Friday (February 12) for a pace of 20 minutes on their lines. We will be on the same pace on Saturday. Sunday is separate, there is less service. Irizar wants to release two more Nemos per day starting Saturday
», Indicates Éric Patoux, director of Keolis, director of the transport network of Amiens Métropole (Ametis). The thaw will not speed up the pace, ”
it is necessary to purge and check the sensors
», He adds.
He’s under pressure. On Wednesday February 10, 37 Nemos out of 43 remained at the depot in Rivery. Thursday, there were 40! This Friday, February 12, 33. Because the Nemo has a cold. Condensation has frozen in the brake system. Fault ”
», Says Amétis. It’s cold, but it’s not Moscow either!
The reality is that the Nemo, a jewel of technology, has had a series of setbacks, often pushing it away from the safety threshold to provide service (36 Nemo running out of 43). In July 2019, it was the heatwave that left him on the side. Irizar did not reach the efficiency rate of 85% contracted with the community. Hence financial penalties (2 million euros) for the additional costs generated at Keolis in 2019.
1. Nemo is sensitive
From its launch on May 11, 2019, Irizar’s engineers spent hours under the hoods of the Nemo in the city. This bus has 200 sensors. The slightest weakness (load, steering, etc.) cuts the engine. Irizar was slow to explain it to the drivers, unable to restart the beast. The software used is new. A simple update can crash everything. Hence the interventions of the famous Ametis tow truck.
Irizar has opted for controlled energy: lithium-ion. To move articulated buses of 18.70 meters for 19 tonnes, excluding passengers, four batteries are required slowly charged to 100% at night at the depot, and to 85% in five minutes on the 650 kW jib cranes at the end of the line. There are 12 small 24-volt batteries that power the systems. And there’s plenty: hot / cold air conditioning, camera mirrors, driving position, geolocation, screens for travelers, USB sockets in the seats, ticketing, etc. And if they weaken a bit, the Nemo does not start. ”
And at night, the ticketing transmits the data of the day by wi-fi
», Indicates Éric Patoux.
We remember this Dacia repairing a Nemo avenue de la Paix (Amiens North) at the end of May 2019! There was also a defect in the packs surrounding the four lithium batteries, because they did not insulate them sufficiently. A problem that remains recurrent. Finally, electronic cards acting on traction had to be reviewed across the entire fleet.
2. It’s hard to drive
The drivers trained by executives, themselves trained in Spain, took a long time to master electric driving, to adjust acceleration and braking. Users can testify to this. And that has an impact on consumption. It is also necessary to wedge perfectly under the jib cranes of rapid load. Gallows that fail. The most remarkable was that of November 27, 2019, a software update crashed four out of six, impacting almost the entire network.
From now on, the drivers run on three batteries, 30% of autonomy is enough to ensure a service, where 40% were imposed. To put it simply, you have to cajole these batteries, under rental and maintenance contract by Amiens Métropole.
3. Faulty chassis
As the outages seemed to subside, premature wear was detected in December 2019 on the chassis. Irizar had to call on a new French subcontractor to take over bad welds! There was great concern among Amiens employees and among the ranks of Amiens Métropole. Union authorities will be alerted. In the end, the entire fleet was checked and the necessary corrections made. This once again impacted the quality of the network.
4. Performance not achieved
The project announced speeds of eight minutes on the three 100% electric lines (the fourth runs on diesel). It is too little achieved. The result of technological glitches and a redone road, which has been corrected several times, but which too often puts the Nemo back in traffic. The Metropolis is also paying for the late delivery of the red light management system.
The objective is an ambitious priority at intersections given to the Nemo (managed directly by the traffic control center). In July 2019, Irizar, Amiens Métropole and Keolis announced a new “graphicage” (organization) to approach the rates as close as possible to eight minutes. They are rare.
I hope you are in health and well.
I offer you important instructions regarding this article
- The article has been translated based on the content of the source link below these instructions
If there is any problem related to the content, copyright, correctness of the information contained in this article, or If there are errors in the language, please leave a report below the article. or contact us via email [email protected]. We will try to process as quickly as possible to protect the rights of the author. Thank you very much!
- We only want readers to access information quickly and easily using other multilingual content, rather than information only available in a specific language.
- We always respect the copyright of the author’s content and always include the original link of the source article, and if the author does not agree, leave the report below the article, the article will be edited or deleted at the author’s request. Thank you so much! Warm greetings!