Product NewsGKN expands electric all-wheel drive programme with BMW

GKN expands electric all-wheel drive programme with BMW

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UK-based GKN Driveline has continued its global electric axle drive partnership with the BMW by supplying eAxle technology for a plug-in hybrid version of the BMW X1 in the Chinese market.

The system is part of the same scalable family of eAxles used in the plug-in hybrid BMW 2 Series Active Tourer 225xe.

Chief Executive Officer Phil Swash said: “This latest programme launch for The BMW Group in China shows GKN’s global leadership in electric drive systems. From the i8 sports car to the X1, GKN’s work with the BMW Group reflects our position as the development partner of choice for the new wave of plug-in hybrids with electric AWD.”

Early adopters of GKN’s electric axle drive used the technology to create plug-in hybrid sports cars with electric all-wheel drive that enhanced performance and efficiency. Automakers are now equipping a new generation of compact vehicles with GKN electric drive technology.

Peter Moelgg, Chief Executive of GKN Driveline’s AW&E Drive business, added: “Automakers’ evolving powertrain strategies require suppliers with a focus on mass-production of key technologies – and system integration capability. The combination of our proven driveline innovation experience, all-wheel drive expertise and eAxle production capabilities are making eAWD viable in compact vehicles. GKN’s hardware and software expertise is also supporting the development of future platforms – these will need driveline suppliers to interface effectively with the rest of the vehicle’s electronic architecture.”

The system will be supplied from GKN’s facility in Bruneck, Italy, but application and development work for the technology was conducted by GKN’s operations in Shanghai, China.

For compact car applications, GKN’s single-speed design has a transmission ratio of 12.5:1, reducing the electric motor speed in two stages. The system generates up to 2,000Nm and 70kW of additional torque and power – enough for a vehicle’s pure electric mode to achieve speeds of up to 125km/h and for an all-wheel drive (AWD) mode that accelerates faster than conventional mechanical AWD systems.

The lightweight electric axle weighs just 20.2kg and its compact dimensions facilitate packaging and installation in smaller vehicles. The unit has a length of 457 mm, a width of 229 mm and a height of 259 mm.

When hybrid operation is not required, an electromechanically actuated dog clutch disconnects the e-machine from the driveline, minimising losses at higher vehicle speeds. GKN has also optimised gear and bearing arrangements for optimum efficiency, NVH (noise, vibration and harshness) and durability.

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