Cookie Consent by Free Privacy Policy website Brake or coast? Intelligent regenerative braking on the Volkswagen ID.4
gennaio 07, 2021 - Volkswagen

Brake or coast? Intelligent regenerative braking on the Volkswagen ID.4

Comunicato Stampa disponibile solo in lingua originale. 

  • In the default driving mode, the vehicle coasts in the majority of cases when lifting off the accelerator pedal
  • Brake #energy recuperation maximizes at up to 0.13 g on lift off, close to 0.3 g when using the brake pedal
  • Braking characteristics are tailored to the needs of most drivers

Wolfsburg — Regenerative braking, in other words #energy recovery when decelerating, greatly boosts the range of any electric vehicle. However, what should happen when drivers of electric vehicles take their foot off the right-most pedal is a difficult, philosophical question. Should the electric drive motor act as a generator, converting kinetic #energy into electrical #energy, or should it run without generating electrical #energy, so that the vehicle’s momentum is used for coasting?

The answers to these questions vary greatly depending on the manufacturer and model. Some electric vehicles recover #energy whenever a driver lifts off the right-most pedal after acceleration. In the case of the new #id4 electric compact #suv, #volkswagen opted for a different strategy: coasting takes priority because conversion of #energy inevitably leads to losses. This applies to the D (Drive) position, the default mode, which is automatically activated upon start-up.

The coasting function, whereby drivers take their foot off the accelerator pedal early on, makes for relaxed and predictable driving. Should drivers want to decelerate more, they step on the brake pedal and activate brake #energy recuperation. During the majority of everyday braking maneuvers—up to around 0.25 g of deceleration—the electric drive motor performs the braking alone, while the electric brake servo only activates the friction brakes in situations that demand more stopping power. The transition from generator-based to hydraulic braking goes almost unnoticed, thanks to highly accurate and swift brake and drive system control. These systems also make sure that the rear wheels, where brake #energy recuperation takes place, always have a sufficient amount of grip.

Each #id4 features predictive Eco Assistance as standard. It analyzes data from the navigation system and vehicle sensors to provide drivers with effective support in driving efficiently and in a relaxed way. Once the #id4 approaches a low-speed area, such as urban environments, junctions and bends, Eco Assistance notifies drivers to take their foot off the accelerator pedal. From this moment on, the system manages optimum coasting and #energy recovery without drivers having to intervene. The car responds similarly when it approaches a vehicle ahead that is travelling at a lower speed.

Drivers can use the gear selector rocker switch to change from the D position to B (Brake) at any time. In this mode, the ID.4’s drive almost always recovers #energy during lifting off, but not all the way to a standstill. The limit has been set at 0.13 g—enough for clearly noticeable deceleration that won’t confuse drivers of conventional internal combustion engine vehicles: intuitive operation is one of the vehicles’ greatest strengths.

The #id4 is Volkswagen’s first all-electric #suv and the brand’s first electric world car. It offers sporty yet comfortable driving, a spacious interior and cutting-edge controls, displays, infotainment and assist systems. At launch in the U.S., the vehicle will be offered with an 82kWh (gross) battery and a rear-mounted AC permanent-magnet synchronous motor with 201 horsepower, 228 pound-feet of torque and an EPA-estimated 250 miles of range. A powerful, electric all-wheel-drive variant with 302 hp will follow later in 2021. 

About Volkswagen
Founded in 1955, #volkswagen of America, Inc. is an operating unit of #volkswagen Group of America and a subsidiary of #volkswagen AG, with headquarters in Herndon, Virginia. Volkswagen’s operations in the United States include research and development, parts and vehicle processing, parts distribution centers, sales, marketing and service offices, financial service centers, and its state-of-the-art manufacturing facility in Chattanooga, Tennessee. The #volkswagen Group is one of the world's largest producers of passenger cars and Europe's largest automaker. #volkswagen sells the Arteon, Atlas, Atlas Cross Sport, Golf, Golf GTI, Jetta, Jetta GLI, Passat, and Tiguan vehicles through more than 600 independent U.S. dealers. Visit #volkswagen online at www.vw.com or media.vw.com to learn more. 

News correlate

gennaio 13, 2022
settembre 14, 2021
giugno 04, 2021

Comunicato Stampa disponibile solo in lingua originale. Two-person team traveled more than 35,000 miles and visited 628 #Volkswage...

Comunicato Stampa disponibile solo in lingua originale. EPA-estimated 249 miles of range on #id4 AWD Pro, 240 miles on AWD Pro STh...

La nuova offerta delle 100% elettriche #volkswagen all’insegna della semplicità e della completa personalizzazioneTre basi tecnich...