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Steve Whits

Yaris Hybrid EV button

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14 minutes ago, Mick F said:

You can only reverse in EV.  The engine has no reverse gear, in fact there is no reverse gearing at all.

You reverse by dint of the phases of the electric motor being reversed, so the motor rotates backwards.

Mick.

Well I never knew that..

  If I reverse normally I hear the engine,

but when reversing with EV button pressed,  the engine cuts out.

So I guess it is just quieter when reversing with EV , which is nice

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When you reverse, the engine cannot power the car, it can only keep you warm and/or charge the Battery.  I notice ours runs sometimes in reverse but not always.

Pressing the EV button would stop the heating and also stop the charging, hence the quietness in reverse.

We have a long (75yds) drive that slopes steeply up to the house.  Due to the shape of the drive entrance, if we approach from one side we drive up forwards, and the other side, we have to reverse up.  There's nowhere at the bottom of the drive to turn, so we have no choice to go forwards or backwards up the drive depending from which direction we come along the lane to home.

With normal cars, we can reverse up at a good speed, but in the Yaris Hybrid, we can only reverse in EV and it's slower and far less powerful than under engine power.  I wonder too, that the throttle response is attenuated in reverse so it feels very underpowered.  Remember, the drive is steep ......... 25% slope and steeper in places maybe up to 33%.

Mick.

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46 minutes ago, Mick F said:

We have a long (75yds) drive that slopes steeply up to the house.  

This should be a good and safe place to re-check the EV mode button's action. With a full-ish Battery and warm engine, select EV mode and notice that you can use power beyond the ECO mid-point without the engine starting. Try without EV mode and notice that engine kicks in as you apply power beyond the ECO mid-point. Simples.

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Excellent idea.

I've often tried VERY gently to come forwards up the drive without the engine kicking in, but near the top of the steepest bit, it always starts up.  We'll be out in the car this afternoon, and we'll in the direction for coming home up the drive forwards.  We have to stop at the bottom to open the gate of course, so it should be a good test.

Thanks.

Mick.

 

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Well ............................................ that was interesting.

I dropped Mrs Mick F off in Tavistock and rather than park up, I went round the block a few times.  She only had to go into one shop and took her time about it, so I didn't have very long - but long enough to test out the EV button round and round and round and round on level roads, and the Battery went from seven bars down to two bars.

When selecting EV Mode, I could drive in EV absolutely fine.  Deselecting it made not much difference to the speed and the power.  It could be possible that in EV Mode rather than EV Normal, the car could be driven a little/tiny bit more spirited, but there wasn't much in it one way or another.  EV Normal could get up the power meter just as far as EV Mode, but in EV Mode I could get there more quickly.  Both of the modes would kick into engine drive at the same point but EV Mode was a little bit less touchy about how fast it got there.

Now ............ coming home as we live in the bottom of a valley, the Battery was fully charged as we arrived at the gate (forwards).  After the gate was closed behind us, I selected EV Mode and attempted to drive in EV up the steep incline.

I did it! :biggrin:

Therefore, as suggested, EV Mode has more power available in electric drive then in EV Normal.

Proof.  Thank you Mike J. :biggrin: :biggrin:

Mick.

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PS:

It seems to me, that EV Mode should be the norm.

Why have the selection available at all?  If you can select it, it means that the system will allow it.  If you can't, it means the system isn't ready.  Why not have it automated?

What's not to like about it being automated?

Mick.

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As I am not a hybrid owner any more, I cannot test this myself, however I still believe that EV button mode allows the traction Battery to discharge further than it would when nothing is touched, meaning that when the petrol engine does kick in, it has to run longer to recharge the Battery.

What the effect on overall fuel economy is by using EV mode via the button as opposed to letting the car do it's own thing is difficult to assess in normal road use.

The only firm conclusion I had over all my hybrid years was that the outside air temperature and how much cabin heat you want cause the biggest variation in economy.

Summer was a bit different, running the aircon made no discernible difference.

 

 

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After a drive this afternoon, there is a speed issue with EV Mode.

Level-ish lane near Tavistock along Crowndale  I selected EV Mode via the button and all was fine until I speeded up.  Got to near 25mph and got the double-beep, but the EV light was still on and I was still driving without the engine running.  Coming back along the same road, I did the same experiment, and found the same result.

EV on the flat, the car will do up to 40mph if you take care, but in EV Mode with the button pressed you won't get anywhere near that.  When it is engaged, there is more grunt, but NOT speed.

Mick.

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EV MODE (the button) has a 20 MPH speed limit.

EV mode (the car symbol when engine off) has a limit of 47 MPH, but you can only drive to about 40 MPH without causing the ICE to start.

Strangely, at 30 MPH WHILE MOVING, you can enter EV MODE button and it permits EV mode driving at higher speeds.

Drop below 10 or 15 MPH and the EV MODE limit returns to 20 MPH, but if you keep the speed up, it will drive in EV MODE to IIRC 35 MPH.

I tend to let the car do what it wants, only using EV MODE to move around the driveway when cold.

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Thanks!

Excellent bit of info!

Mick.

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On ‎12‎/‎05‎/‎2018 at 1:07 AM, YarisHybrid2016 said:

EV MODE (the button) has a 20 MPH speed limit.

Not in my experience. I think that the EV mode speed limit varies with temperature - you may only get around 10 mph when very cold and about 30 mph when nicely warm.

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I experimented yesterday, and found that even with a warm car and a full-ish Battery,  I couldn't get above 20mph without the EV Mode double-beeping at me and turning itself off.

On the other hand, after the double-beep, I can get up to 40mph still in EV drive.  I don't understand why EV Mode is disabled when EV will keep going.

Mick.

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On ‎12‎/‎05‎/‎2018 at 1:07 AM, YarisHybrid2016 said:

EV MODE (the button) has a 20 MPH speed limit.

EV mode (the car symbol when engine off) has a limit of 47 MPH, but you can only drive to about 40 MPH without causing the ICE to start.

Strangely, at 30 MPH WHILE MOVING, you can enter EV MODE button and it permits EV mode driving at higher speeds.

Drop below 10 or 15 MPH and the EV MODE limit returns to 20 MPH, but if you keep the speed up, it will drive in EV MODE to IIRC 35 MPH.

I tend to let the car do what it wants, only using EV MODE to move around the driveway when cold.

This is very strange. My car now acts as above. Perhaps the Battery and inverter temperature are too high for 21 + mph. I am sure that I have seen around 27 mph in EV Mode - will have to wait until winter to re-check.

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On 5/15/2018 at 10:49 AM, Mike J. said:
 
This is very strange. My car now acts as above. Perhaps the battery and inverter temperature are too high for 21 + mph. I am sure that I have seen around 27 mph in EV Mode - will have to wait until winter to re-check.

From my own experience, it seems to be a lottery for how it behaves. I can drive away from home, with the same SOC and same ambient temperature. Sometimes the engine still kicks in almost straight away without using the accelerator.


Sent from my iPad using Tapatalk

 

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On 14 May 2018 at 9:01 AM, Mick F said:

I experimented yesterday, and found that even with a warm car and a full-ish battery,  I couldn't get above 20mph without the EV Mode double-beeping at me and turning itself off.

Well, I experimented again on Tuesday afternoon, and found I could get up to nearly 40mph in EV Mode. :biggrin:

There seems to be rhyme or reason for the way the car behaves in this regard.  Sometimes it works brilliantly, sometimes works ok, and sometimes not at all.

Agree with Anthony .......................... it's a lottery.

Mick.

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The EV light (not EV mode) has some interesting behavior when the car is considering itself "cold".

During the warm-up phase, it may or may not enter EV mode. Two successive days, I managed to drive a good distance in EV mode with good performance (high SoC) after causing the ICE to start. The following day, it insisted on running the ICE, with very similar SoC, and similar weather/ambient temperature.

I just can't relate its behavior to anything specific during warm-up. Once the warm-up period is over (approx. 5 minutes) it behaves very predictably.

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On ‎5‎/‎17‎/‎2018 at 6:11 AM, Mick F said:

Well, I experimented again on Tuesday afternoon, and found I could get up to nearly 40mph in EV Mode.

On a drive today, I had EV Mode trip out at 20 mph and 5 miles later, I put it back into EV Mode and got to 30 mph before it tripped out again.

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At the moment I am driving in Germany, with the warmer temperatures ev and ev mode is lasting longer than back home. Having the aircon on has a big impact though.


Sent from my iPhone using Tapatalk

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