- New structure for a 2-speed is perhaps gentle and compact whereas sustaining effectivity
- Might doubtlessly enable sturdy launch with a lower-cost motor unit
- Thought is perhaps due in future Lucid EVs, or engineers would possibly nonetheless be pondering it
The Lucid Air electrical sedan already achieves spectacular effectivity with its current drive unit, however the automaker is perhaps contemplating a 2-speed transmission for doable future use, a patent submitting signifies.
The patent, first noticed by Motor1, was filed in 2023 and appears to construct on the present drive-unit setup, which makes use of two coaxial planetary gearsets to offer the mandatory discount from motor pace to wheel pace whereas retaining packaging compact.
It describes the usage of a number of planetary gearsets to attain two gear ratios, with a tapered gear floor on every respective gear plus a system of one-way clutches to modify between them.
Most electrical automobiles do with out multi-speed transmissions, however they’ve been a subject of debate for a while. The unique Tesla Roadster was supposed to make use of a 2-speed gearbox, however that was substituted for a hard and fast reduction-gear setup after prototypes did not deal with the motor’s copious torque.
Lucid 2-speed transmission. – U.S. patent
Lucid, within the patent utility, considerably parallels explanations offered to Inexperienced Automobile Studies prior to now from CEO and CTO Peter Rawlinson about why it hasn’t but used a multi-speed unit. Within the submitting, the corporate’s authors defined that the gearboxes already utilized in a couple of electric-vehicle fashions “are advanced mechanisms that take up important area, they might have low effectivity and/or ship low preliminary torque, and so they place a big inertia load on the drivetrain (e.g., an extreme jerk when shifting).”
If such a element would not take up preliminary area or scale back effectivity, whereas permitting smaller, lighter motors, incorporating them with Lucid’s upcoming Atlas drive unit might feasibly repay in averted value and weight—though the corporate has made no claims as of but that this patent has something to do with Atlas.
Subsequent-generation Lucid Atlas drive unit – certain first for future midsize EVs
“Lucid repeatedly explores new concepts and develops technological improvements that might additional advance our electrical car know-how and assist speed up humanity’s transition to sustainable transportation and vitality,” the corporate said, in response to Inexperienced Automobile Studies’ query as as to whether this patent is perhaps linked to Atlas and thus its future midsize fashions, initially. “Defending distinctive IP is a typical a part of the innovation and improvement course of, although we are able to’t communicate to potential future functions of particular patents.”
2024 Lucid Air
The Porsche Taycan has a 2-speed gearbox for its rear wheels, which Porsche has mentioned helps stability acceleration and high-speed effectivity. The ‘field has a low gear that helps ship extra torque from a standing begin, whereas retaining the rear motor and energy electronics cooler. The excessive gear robotically engages at a sure pace threshold, or when the drive eases up on the accelerator (handbook shifting is not doable), and driving it gently can skip the low ratio completely.
In dual-motor variations of the Mannequin S, Tesla has used motors with totally different gearing to attain comparable targets. Volkswagen can be assured that it could actually discover different methods to maximise effectivity. In a latest interview with Inexperienced Automobile Studies, Kai Grünitz, VW’s head of world analysis and improvement, mentioned the automaker nonetheless has no plans for 2-speed transmissions in EVs.
Mercedes-Benz, however, is utilizing a 2-speed transmission in its next-generation MMA platform, which is able to underpin 4 compact fashions beginning with the 2026 Mercedes CLA, which can be offered with all-electric and hybrid powertrains. And maybe Lucid will observe by means of and embrace a further gear ratio in a few of its future EVs as nicely.
–with reporting by Bengt Halvorson
