yaris cross 4 wheel drive capability

[Garth.]

The video below is a response to the allegations about roller test of Yaris Cross being unrealistic and it analyses operation of AWD-i system in several winter situations. This is not about showing how bad the system is but about pointing out its weak points that users and potential buyers should know about.

Different all wheel drive systems have different drawbacks (tendency to overheat, delayed reactions, jerking, etc.), in this case it is the poor starting torque of the rear motor, resulting in the rear axle's inability to push the car by itself (the problem does not exist in the AWD system of non-hybrid Yaris Cross).

 

And here's something about the resistance of rollers...

 

[Burg0]

On 3/8/2024 at 6:06 PM, Garth. said:

AWD system of Nissan Juke includes torque vectoring on rear axle. There is no conventional open differential (which always splits the torque in 50/50 ratio) but a double clutch pack unit, each rear wheel is powered separately so the torque may be freely shuffled between left and right, for example only to outer wheel while cornering - that's why car feels well balanced.
Similar system may be found in top versions of petrol Rav4.
AWD system of Vitara is quite similar to the one from petrol Yaris Cross, rear axle has open differential which is powered via electromagnetic coupling placed at the end of driveshaft. Automatic gearbox (in petrol) is old-fashioned hydraulic unit.
AWD system of Yaris Cross is described in previous posts, it falls into category of mild awd systems due to speed/torque/power limitations of 1MM electric motor powering conventional rear open diff.
After short research - AWD system of new CH-R is quite similar, it also includes tiny, two shaft type electric rear motor on rear axle but it's 1WM - much more powerful, that is 30 kW/84 Nm (vs  3.9 kW/52 Nm in Yaris Cross).
Gear ratio is the same for both (10.487) but due to better parameters, starting torque of 1WM is probably high enough to push the car by itself, which is huge advantage over the Yaris Cross. It also may have no speed limit of operation.
Video below shows the missing part of Yaris Cross vs Vitara test, it simulates the situation when three wheels have great grip and only one front wheel has low grip. AWD-i system must rely on front axle TC intervention to move the car forward, rear is not pushing enough to prevent the front of losing grip.

 

Hey Garth thank You so much for so much interesting and useful information about the subject.

I would love to hear more of your opinion on the new C-HR 2.0 Hybrid and the Corolla Cross 2.0 Hybrid AWD-i capabilities as I am looking into buying one of them in the next month. From my research they both have the same exact drivetrains and awd systems am I correct in that?

Can't seem to find any good videos on testing their AWD-i systems capabilities in real world applications or roller tests...