Talk:Toyota Prius C

P410, P510

@Peterh5322:, what do the P410 and P510 terms/codes refer to ?  Stepho  talk  23:48, 22 May 2015 (UTC)

P410 is the model identification for the Prius v and Prius Plug-in transaxle.

P510 is the model identification for the Prius c transaxle.

Both are "third generation" transaxles, meaning the two motor-generators do not share a planetary drive unit in common ... these motor-generators have independent planetary drives.

However, the output of the planetary drives is indeed in common, as the output of the power split device (which, in these cases, serve the internal combustion engine and the motor-generator one) is also the output of the motor speed reduction device (which has as its only input the motor-generator two). In order to accomplish this, the "carrier" of the motor speed reduction device is held fixed (it is not free to rotate, although the planet pinion gears are certainly free to rotate).

In the Prius c application (P510), the power split device has a ratio of about 0.9:1, whereas the motor speed reduction device has a ratio of about 2.5:1.

In the Prius v and Prius Pluv-in applications (P410), the ratios are slightly different. And, of course, the P410 is larger and is rated higher than the P510, as the larger models weigh about 500 pounds more, and the engine is 1.8 L, rather than 1.5 L for the Prius c.

Also, taking into account the differences in vehicle weight and engine power differences, the P410 has five planet pinions on each carrier, whereas the P510 has three planet pinions on the power split device carrier and five planet pinions on the motor speed reduction device carrier.

Finally, the P410, which is also applied to other Toyota hybrids, mainly the Camry, has different final drive ratios than those applied to the Prius.

So, P410 may be taken as a general designation for a medium-sized hybrid drive system, whereas P510 may be taken as a general designation for a sub-compact-sized hybrid drive system.

Peterh5322 (talk) 02:32, 23 May 2015 (UTC)Peterh5322

'Transaxle' was the missing clue we needed. Most readers will have no idea what those codes mean with out that word in the article.  Stepho  talk  03:47, 23 May 2015 (UTC)

Move discussion in progress

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Facelifts

I've noticed the facelifts aren't exactly accurate. The first section has before facelift, a white 2012-2014 model-year vehicle, then "First facelift, a orange 2015-2017 modelyear, but I'm thrown off by the third image, "Second facelift". To me that looks like a Aqua crossover bumper. I can only speak for the Australian units, as I have their repair manuals, but in Australia, the 2018 modelyear, the 2nd facelift, is the same as the image titled "Second facelift Toyota Aqua", and in Australia "Pre-facelift Toyota Aqua", then "First facelift Toyota Aqua", finally "Second facelift Toyota Aqua" is an accurate representation of the facelift history.

...I've just looked into this further, and it seems that for right hand drive countries outside of Japan, basically just Australia, the Aqua's facelifts are used, whereas in left-hand drive countries, the crossover bumpers are used. Would there be any objections to adding a note under "Second facelift Toyota Aqua" to say this style is also used in RHD Prius C's? — Preceding unsigned comment added by Dalekmun2010 (talk • contribs) 10:28, 14 July 2018 (UTC)

We need to be careful about what '2018 model year' means. In the US it means a change introduced around August 2017. In Australia (my country), it sometimes means a change introduced in 2018 (following our traditional dating system) and sometimes means the US system (because we follow Americans in so many things, regardless of whether it makes sense or not). So in manuals, brochures, adverts, magazines and books a claim of a change in 2018 can be out by a whole and there is no way to tell unless a month was also mentioned. Which means it is possible that your manuals are a year behind and therefore don't mention the facelift done in calendar year 2018. Or was it model year 2018, which was really calendar year 2017? Confusing, ain't it. What do the cars at dealers look like?  Stepho  talk  23:14, 14 July 2018 (UTC)

In my case I was only talking about model year. Cars stamped with "Model year 2017" started rolling into dealers around the end of 2016. By the end of 2017, "Model Year 2018" were in dealers with the facelift. Thus, "Model year 2015, 2016, and 2017" included the first facelift, whereas "Model Year 2018" and onwards have used the second facelift. I assumed everyone simply used model years, and that any mid-year changes different to those found in the following model years car would simply have amendments, an example being "Model Year 2019 with July Safety Package Update. 203.214.104.80 (talk) 11:14, 6 September 2019 (UTC)

Which country are you in? As mentioned above, model year 2018 means different things in different countries and "2015 Prius C means different things in different countries. To avoid this WP explicitly uses calendar years (preferably with a month).  Stepho  talk  21:30, 6 September 2019 (UTC)

Gobbledigook technobabble

I've read the article and I still have NO idea how the energy savings are made. How is the battery charged? Can someone please write a plain English explanation. Kelly222 (talk) 23:10, 11 January 2020 (UTC)

Petrol engines are most efficient at higher revs. Electric engines are most efficient at low revs. Batteries big enough for daily commutes are large and heavy and take a long time to recharge. So hybrid combines the best of both. Petrol engine is kept at its most efficient revs. Gearbox selects ratio (CVT has infinitely many to choose from) to match to road speed. Any excess power is used to charge a smallish battery. When the battery is near full and road speeds are low then the petrol engine is turned off and the electric motor pushes the car. When the battery is nearly empty or the car needs more power than the electric motor can provide then it turns the petrol engine back on. The electric motor and petrol engine can also be used together for high acceleration (eg starting or overtaking). Over simplified but covers the majority of cases.  Stepho  talk  23:27, 11 January 2020 (UTC)