Shown fuel consumption at end of a journey

[philip42h]

30 minutes ago, Haliotis said:

Been checking car’s behaviour over last few weeks.  The EV light is illuminated when the car is running on electric, and this never comes on when the ICE is being used, so I feel reasonably certain that the two never work simultaneously.

The EV light comes on when the ICE is off - at that point the car is running from the traction Battery alone (or simply coasting).

When the ICE starts, the EV light goes out - at that point the car is running from the traction Battery and petrol engine combined - i.e. the two are working simultaneously. The electric motors support the ICE when you accelerate, and run as generators when the car slows or the traction Battery is running low.

Edit: If you look at page 177 of your Owner's Manual it shows you how to access the "Energy monitor/consumption screen". This gives a visual display of how the car is being powered or generating power at any point in time ...

[Hadrian1]

You can also have the Battery charge/discharge showing when "Info" is selected.

I also have running average displayed.

I use that a lot.  My Yaris is averaging about 62mpg, and my Rav4 a fraction under 52mpg. That is on undulating and twisty A Roads.

[AndrueC]

On 4/8/2024 at 2:19 PM, Roy124 said:

No.

Take a Corolla with a 1.8 engine.  That is actually a very large engine on today's market.   Many similar cars are using 1ltr or less.

It is however operating in something called the Atkinson Cycle. It's not a true Atkinson Cycle engine it is simulating it by adjusting the valve timings but it means that it gains in efficiency while losing in power.

From my experience the 1.8 in the Corolla is slightly less powerful than the 1.3 in my old Jazz. This was particularly noticeable at the top end. There's a hill near me (the A422 up from the Banbury M40 junction) where if I felt like it I could floor the accelerator and the Jazz would romp up it and be at 100 mph before I had to back off for the roundabout. My Corolla starts of faster but runs out of puff and can barely get to 90mph before I have to back off.

It's a noticeable difference. The Jazz basically ran out of road and accelerator pedal movement. The Corolla just feels like it's knackered.

Now I'll stress that that's an extreme example and not something I did very often. In normal driving the Corolla feels more peppy if I push it probably because of the electric motor. It's also more efficient (Jazz was around 50mpg across the year, my Corolla is more like 60mpg).

As regards the hybrid system the ability to drive on Battery alone is not the big deal (not unless it's a PHEV anyway). The big deal for the original hybrid is that the motor can be used to help take load off (or indeed put it on) the ICE in order to help it operate as efficiently as it can.

In the case of putting extra load on the extra power produced is used to put electric charge into the Battery. In effect it's an investment. Burn more fuel now so that you can burn a lot less later.

[Haliotis]

Thanks for that, Philip.  Must admit I missed that info - TBH I am not impressed by my Toyota handbook as I have found some info to be hard to find because it seems to be buried inside another info detail.   

[AndyRC]

Toyota have been doing the “hybrid” system far longer than anyone else I can recall and have continually invested in the technology. I’m just hoping these figures are confirmed when I refill the car , which could be weeks away. 
 

 

[philip42h]

21 minutes ago, AndyRC said:

Toyota have been doing the “hybrid” system far longer than anyone else I can recall and have continually invested in the technology. I’m just hoping these figures are confirmed when I refill the car , which could be weeks away. 

That would give you an aggregate 70 mpg over about 60 miles in around 2 hours - so at an average of around 30 mph.

It would be interesting to see what you get for a longer journey at a higher speed - say 120 miles in 2 hours ... ?

[AndyRC]

24 minutes ago, philip42h said:

That would give you an aggregate 70 mpg over about 60 miles in around 2 hours - so at an average of around 30 mph.

It would be interesting to see what you get for a longer journey at a higher speed - say 120 miles in 2 hours ... ?

Planning a 75 mile trip over the North Yorkshire Moors to Whitby  this week which has a lot of hills so will be interesting to see what we get on that one. As for averages the CEO’s old 2.0 Excel was her company car and over 32,000 miles, according to the My T App, the average MPG was 52 , the average MPH was 29 with a good half of that on MWay.  Reality is these days,  on most  journeys average speeds are pretty low and I’ve no idea where I could cover 120 miles in 2 hours unless I was on a motorway in the middle of the night 🤷‍♂️

[Cyker]

The newer HSDs do a LOT better on hills than the previous ones; One of the reasons me and madasafish clung onto our Mk1 D4Ds for so long is they would destroy the earlier hybrids for mpg on hilly runs, but these new ones are finally good alternatives to diesels from a pure utility point of view.

My Mk4 doesn't seem to care (It just keeps returning near 70mpg no matter what I do as long as I'm not absolutely caning it for the entire journey, and then I'll get maybe 65-68  ), although it does get a bit unpleasant when 5-up and fully loaded and I run out of Battery charge while going up a hill - The engine copes as it switches to Otto-cycle mode, but it gets *real* noisy, like 1st/2nd gear revs with the absence of any appreciable sound insulation in the Yaris  

To be fair it'd probably be like that in a normal low-displacement petrol car, but when you're used to how a lower-revving turbo-diesel behaves, where more load just means more turbo noise ,  the sudden change in engine demand is quite jarring!

[AndyRC]

On 4/8/2024 at 10:07 AM, Haliotis said:

Thanks, guys, for the explanations given.  I have never managed to spot the EV light being on when the engine is using petrol.   From the comments, I am assuming that, on a typical journey, the engine is mainly running on ICE with the hybrid unit providing a supplementary role.  

This causes me to wonder heather it is worth having a hybrid instead of a straightforward ICE vehicle.  Any perceived savings are offset by other factors.  The emission figures and VED rates give no obvious financial advantages, and the higher costs of buying a hybrid, taking into consideration the insurers claiming that hybrids are a greater fire risk and more expensive to repair, are we being sold a pup where hybrids are concerned?

For myself, reverting to a conventional ICE vehicle seems to be the sensible way forward.

A lot of the new smaller engined , 1.0 or 1.5 litre turbo petrol engines from Ford or VAG etc , linked to an auto/DSG transmission can be very fuel efficient, over 50 MPG without trying too hard. Doing the maths is quite complicated at when all the other costs in addition to fuel are taken into consideration, VED, Servicing , depreciation, insurance etc. personally I like the Toyota HEV system and in 2litre variant makes for a refined drive and so far ours is proving to be very economical,  according to the onboard computer. I think Toyota have probably the best HEV platform out there at the moment.

[philip42h]

On 5/6/2024 at 11:49 AM, AndyRC said:

Reality is these days, on most journeys average speeds are pretty low and I’ve no idea where I could cover 120 miles in 2 hours unless I was on a motorway in the middle of the night 🤷‍♂️

I had intended to come back with figures from my wife's trip home the other day (C-HR mk1, 2.0) for comparison purposes - around 150 miles in about 3 hours, so an average of about 50 mph - but the My Toyota App decided that it didn't want to record that trip! 🤷‍♂️

I used to do a daily commute of around 150 miles each way (once a week) and, yes, a 60 mph average on a UK motorway is a challenge! (We did that and more driving to Vienna and back the other year but that was in the RAV4).

My point was that individual trip measurements, while interesting, aren't necessarily a good indication of overall economy. But, of course, if the vast majority of your journeys are shorter and unhurried you will achieve an economy associated with that profile rather than that of a motorway road warrior. 🙂