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Global engineering firm GKN has made a revalation about \u00a0what it considers to be a step forward electrified rear axle system.<\/p>\n
It adds in so-called Twinster torque vectoring technology, as used in the\u00a0Ford Focus RS, with a flawless shift two-speed transmission and an electric motor.<\/p>\n
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eTwinsterX is a grouping of off-the-shelf GKN technologies, that is to say: Twinster torque vectoring (which uses two clutches to distribute torque between the wheels) and an electric motor-driven axle joint with a two-speed gearbox.<\/p>\n
Multi-speed transmissions facilitate electric vehicles to distribute better launch performance using the lower gear, and more efficient high-speed driving with second gear, in this case up to a V-max of 155mph.<\/p>\n
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The system\u2019s optimized shifting policy, which makes the e-motor operating close to its efficiency \u2018sweet spot\u2019, means that it can deliver greater maximum driving range as well.<\/p>\n
Single-speed transmission vehicles normally have a mechanically-limited top speed, or else the e-motor would be operating in an ineffective part of its rev band. With a two-speed system, the higher gear allows the e-motor to operate at lower \u2013 and more efficient \u2013 rpm at higher speeds.<\/p>\n
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Torque vectoring deals with the allocation of torque to individual wheels, and can intelligently control vehicle dynamics. For instance, enabling over-speeding of the outside wheel in a corner can induce a yaw-moment, helping to steer the vehicle towards a tighter cornering radius.<\/p>\n
GKN Driveline’s Twinster torque vectoring solution is exceptional in that it takes over \u00a0a conventional differential with a twin-clutch system that precisely adjusts the torque delivery to each wheel.<\/p>\n
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The electric motor is used to start on the vehicle. Likewise reverse could be a thing of the past, as the electric motor is used to move the car backwards, as long as there is enough juice in the battery to allow it to do so.<\/p>\n
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GKN considers the system could be in series production by the early years of the next decade and, as of its flexibility, would be similarly suited to pure EVs as well as any other form of hybrid.<\/p>\n
Theo Gassmann, GKN\u2019s vice president of advanced engineering, says: \u2018The combination of Twinster does a better job of four-wheel drive than a conventional mechanical system, because we have more freedom to deliver power to the second [rear] axle, even allowing negative torque.<\/p>\n
\u2018Twinster with an electric motor gives full torque vectoring technology because it delivers electric power to each rear wheel for maximum response, traction and stability.\u2019<\/p>\n
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Global engineering firm GKN has made a revalation about \u00a0what it considers to be a step forward electrified rear axle system. It adds in so-called Twinster torque vectoring technology, as used in the\u00a0Ford Focus RS, with a flawless shift two-speed transmission and an electric motor. Why is it called eTwinsterX? eTwinsterX is […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jnews-multi-image_gallery":[],"jnews_single_post":[],"jnews_primary_category":[],"jnews_social_meta":[],"jnews_override_counter":[],"jnews_post_split":[],"footnotes":""},"categories":[25],"tags":[],"class_list":["post-6480","post","type-post","status-publish","format-standard","hentry","category-general"],"yoast_head":"\n