[hunter81]

I notice that sometimes the car won't use regenerative braking no matter how much I ease into slowing the car down. I notice this when I haven't been driving the car that long, but it seems to happen occasionally at other times and no matter what I do the car is just resolved to use friction braking. Is this the car's way of warming up the brakes or exercising the hydraulic systems? I don't know if that even makes sense or not.

 

[andrew]

I can't remember if this happens to me when I first start the car on a cold morning and it uses the gas engine for a minute or two to warm up.

 

[hunter81]

Now that I think of it, it does seem to happen more on colder days. Maybe it is part of some warm up cycle for the braking system.

 

[InfinitiPlusOne]

Not sure if I understand it completely. When you refer to regenerative braking, do you meant the car is in EV and it charge the battery as it slow down?

 

[hunter81]

The assist/charge gauge doesn't go into the blue more than what coasting deceleration alone would provide. Even slowing down from 40 or 35 you can at least get it to swing half way, but sometimes the car just insists on using friction brakes and the gauge shows only minimal recharge.

 

[druhoops]

my guess it's cold weather. the batteries have to warm up. that's why you see vents beside the back seats. keeps the batteries not too warm, not too cold.

 

[hunter81]

my guess it's cold weather. the batteries have to warm up. that's why you see vents beside the back seats. keeps the batteries not too warm, not too cold.

That's a good point. On cold mornings the battery is cold too. Maybe it needs the battery to reach a certain temp. before it can really start charging it.

 

[andrew]

This morning I watched for this when I left.
I get no regenerative braking while leaving my block.
This is at 25MPH and hitting a few stop signs.
The GAS motor is running the entire time.

After I get out to a main road and get up to 35-40MPH, I get regenerative braking at the first stop light I hit.
By then though, the GAS engine is warmed up enough to turn it off at the stop light, so I'm off the GAS engine.

I'll try to observe a bit when I'm driving normally if I don't get regen braking.

 

[hunter81]

This morning I watched for this when I left.
I get no regenerative braking while leaving my block.
This is at 25MPH and hitting a few stop signs.
The GAS motor is running the entire time.

After I get out to a main road and get up to 35-40MPH, I get regenerative braking at the first stop light I hit.
By then though, the GAS engine is warmed up enough to turn it off at the stop light, so I'm off the GAS engine.

I'll try to observe a bit when I'm driving normally if I don't get regen braking.

That's my experience too. I'm going to watch it more though and also pay attention to warmer days versus colder days.

 

[hunter81]

This morning I watched for this when I left.
I get no regenerative braking while leaving my block.
This is at 25MPH and hitting a few stop signs.
The GAS motor is running the entire time.

After I get out to a main road and get up to 35-40MPH, I get regenerative braking at the first stop light I hit.
By then though, the GAS engine is warmed up enough to turn it off at the stop light, so I'm off the GAS engine.

I'll try to observe a bit when I'm driving normally if I don't get regen braking.

Well, I have been paying attention and the car certainly does have periods after warm up where it just doesn't want to use regenerative braking. I noticed it today after a fair amount of "spirited" driving. Basically, I had been flooring the car whenever I got a little opening on the freeway on the way home. I think it's to help regulate battery temperature.

 

[Thuanvinhny]

Does any one here have a PDF Manual book of the Q50H ? My guess is that the car need to warm everything up in order to function properly.

Engine
Motors
Battery