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Inmotive to develop Ingear two-speed EV transmission for a future Suzuki EV

Inmotive has signed a joint development agreement with Suzuki to develop an Ingear 2-speed EV transmission (earlier post) for a future Suzuki electric vehicle.

The Ingear is an efficient 2-speed transmission designed specifically for EVs. Many EV powertrains in the market are single-speed; typically, there are two helical reduction gears between the motor and the wheels.

Ingear replaces the second reduction gear with a continuous chain drive and an innovative morphing sprocket that resizes during a shift. The entire shift happens during a single revolution of the wheels.

To shift, an actuator directs outer gear segments in or out of the chain path, while the motor speed is carefully adjusted so that shifts are barely perceptible and can be completed in as little as 19 milliseconds.

Combined with a chain and chain-tensioner, Ingear provides for 2:1 or similar gearing ratios. The extremely efficient chain is always kept in line with the morphing sprocket.

Low-gear is used to move the car from a standing start to half of highway speed. High-gear is used for higher-speed driving. By enabling the electric motor to operate more efficiently, more of the battery’s power is used to move the car, and less is wasted as motor and transmission heat. Less waste means more range from each charge.

Ingear’s patented geometry keeps the motor in continuous connection with the wheels. Torque from the motor continues to flow to the wheels, even during shifting while torque fill algorithims maintain a smooth passenger experience. Similarly, regeneration is continuous, even while downshifting.

Inmotive says that through this compact and simple design, the Ingear can improve electric vehicle cost, range and efficiency. An Ingear can extend EV range by up to 15% and improve acceleration by up to 15%. Its patented geometry delivers a smooth and quiet ride.



This is a fairly clever2-speed transmission and uses a inverted tooth chain (sometimes called silent chain) which probably has involute tooth profiles. It seems to work somewhat like the automatic bicycle transmission designed by Bruce Browning. Bruce is the grandson of the legendary American gun designer John M Browning. The Browning Automatic Transmission used a similar mechanism to shift a segment of the sprocket and will shift 30,000 times on a small 9v battery. You can smoothly shift under full torque and because there is only the chain and 2 sprockets involved at any time, it is as efficient as a normal derailleur bike transmission. It was the only bike automatic transmission that really works. Anyway see: https://www.youtube.com/watch?v=CncoMaNVeiY&ab_channel=TheYellowSheldon

I have a bike with one of these transmissions and was approached at one point to consult on building a version that would was proposed to be used as a low cost car transmission for cars in 3-world countries but as far as I know, that project never got off the ground.

Anyway, I like the Inmotive Ingear transmission concept.


The thing I like about my Leaf is it doesn't shift and runs smoothly all the way up to it's limit of 92 MPH.; The thing I don't like is the limit...which gearing would correct; Hopefully, with Ingear shifts as smoothly as sd suggests.


Seems good for some niches and HEVs


GM has been using final chain drive for decades, recently in the 2016 Chevy Volt and long ago on the 1966 Olds Tornado.
Should work on all of the Suzuki front drive models, maybe even a Suzuki Jimny EV.


GM uses an inverted tooth chain for all of their front drive cars to take the power from the torque converter on the transverse engine to the transmission/final drive located along side the engine. They also use an inverted tooth chain for most of their engine cam drives and for the high/low transfer case in their 4 wheel drive pickups, etc. I have never heard of any problems with the inverted tooth chains.


Maruti Suzuki, the largest auto manufacturer in India needs to get into the Indian EV market very soon. Competitors like Tata, Hyundai, and MG already have excellent EV models.
Check this: https://www.autocarindia.com/car-comparison-reviews/mg-zs-ev-vs-tata-nexon-ev-vs-hyundai-kona-electric-comparison-419879
Suzuki showed the EVX Concept at the 2023 Auto Expo in Delhi, India. However, it won’t come until 2025. It is comparable in size to these 3 Indian Crossovers.

To make it outstanding use this transmission and an LFP battery. They could use an Exide battery made in India, particularly since Exide is partnering with SVOLT.

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