ICE start due to Regen when HV battery near full charge..

Robert_Alabama

Well-Known Member
The post by @coutinpe about ICE running made me realize that I haven't seen this in a very long while, maybe years....
Has anyone else noticed with an aging Clarity that this annoyance has gone away? My Clarity is a 2018 with almost 75k miles and has about 42 Ah capacity on the battery. For the first few years of owning the car, this was the really the only complaint I had for the operation of the car.
 
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Mine is also a 2018 with about 72,000 miles. When it was new and had a fully charged battery even a small amount of regen, like anything but very gently braking at the stoplight at the end of a gentle downslope near my house, would frequently trigger the gas engine. I have noticed that this same location never does that anymore, even when I brake much harder at the light.
 
Removing this annoying feature of the car seems to be one of the benefits of degrading the battery somewhat. Nice to get a good side effect of losing a few EV miles.
 
In 4 1/2 years the ICE in our Clarity was never triggered by regen with a fully charged battery. I did not micromanage charging. It was always just fully charged with a “dumb” L1 or L2 EVSE. From what others have described it seems like the ICE should have started, given that we regularly descended a 1/2 mile hill with an 8.8% average grade at the end of our driveway which was also downhill with the steepest part just before the road. Near the bottom of the hill was a sharp right turn that required moderate braking. Typically, we would slow from 50-55mph to 35-40mph. On some occasions I would use the paddles to set regen at max (4 chevrons) in order to control speed and minimize braking effort. This was done hundreds of times. The engine never ran.

Not to worry, as the car had other annoying features. My solution to avoid the annoying features of these vehicles (PHEV’s) that I once believed to be the ideal vehicle, is to not own one.
 
The engine starting with a full battery seems to be restricted to the 2018 model year. I don't recall seeing that complaint from owners of later models.

Our 2018 Clarity is showing around 45 kWh of capacity with a bit more than 45K on the odometer. The car has had the unwanted engine start since new. After reading this thread I decided to try it again on a full charge (I normally put it in Neutral going down our steep hill). Alas, it still started up.
 
I'm not sure why this is a big deal. So, you burn 3 cents of gas occasionally when the regen braking is over charging the battery. What's the big deal?

If I could snap my fingers and have this never happen? I'm not sure that I would even bother.

I guess that every human is different and is aggravated by different things:)
 
In 4 1/2 years the ICE in our Clarity was never triggered by regen with a fully charged battery. I did not micromanage charging. It was always just fully charged with a “dumb” L1 or L2 EVSE. From what others have described it seems like the ICE should have started, given that we regularly descended a 1/2 mile hill with an 8.8% average grade at the end of our driveway which was also downhill with the steepest part just before the road. Near the bottom of the hill was a sharp right turn that required moderate braking. Typically, we would slow from 50-55mph to 35-40mph. On some occasions I would use the paddles to set regen at max (4 chevrons) in order to control speed and minimize braking effort. This was done hundreds of times. The engine never ran.

Not to worry, as the car had other annoying features. My solution to avoid the annoying features of these vehicles (PHEV’s) that I once believed to be the ideal vehicle, is to not own one.
Please expand as to what spoiled you on phevs. I'm curious to read your thoughts on the matter, if you wouldn't mind sharing them. Thanks in advance.
 
Please expand as to what spoiled you on phevs. I'm curious to read your thoughts on the matter, if you wouldn't mind sharing them. Thanks in advance.

I’ve rambled on about it elsewhere. Your latest post made me chuckle. Although I’ve never experienced the phenomenon, what you and other have described is just another reason to avoid a PHEV such as the Clarity.

There’s quite a list on annoying features and I should be above allowing those annoyances to irritate me. Much like with an annoying acquaintance, sometimes the path of least resistance is to stop associating with them.

Yes, wouldn’t it be nice if the operator had the option to set HV as the default mode? Wouldn’t it be great if the car didn’t become a road hazard when the battery becomes depleted? How convenient would it be to just get in the car and drive?

We never had a PHEV related recall with the Clarity, however some owners are now faced with a decision of whether or not to pay more that $10K to replace an out of warranty battery on an 8 year old car with maybe 100K miles. Modern cars typically don’t need a new engine after 8 years and 100K miles and it won’t cost $10K if it does. The Clarity did have recalls for a fuel pump and air conditioner and was also known to have premature wheel bearing failures as well as brave discs that were prone to rusting.

We have had several PHEV related recalls and repairs on our Jeep 4xe. Two were on the battery. The first fix was a software update, the second was a battery replacement. In between those services, the HVAC module failed. This was presumably not a PHEV issue, despite the fact that the dash display showed a problem with the hybrid charging system. Most recently, after the battery replacement, a problem surfaced which caused EV mode to be unavailable. It turned out that the battery heating/cooling module had failed.

As far as cost savings for operating on electricity vs gasoline, we are presently located in Michigan, where Consumers Energy has blessed us with another rate increase, this time it’s 8.9%. While many are presently whining about the current price of gasoline they seem to be oblivious to the steadily increasing cost of electricity. To fully charge the Jeep will cost about $3.50 this summer and around $3.00 in winter. That gives us about 24-25 miles of EV range, or roughly the same as a gallon of gas, in summer. In winter the EV range plummets to around 14 miles. Even with gas around $4/gal at the moment there’s only a slight advantage to using electricity. During winter it is significantly less expensive to use gasoline.

There are currently no incentives to buy an electrified vehicle and even if there were, one should honestly evaluate any potential differences in operating costs as well as considering the risks of possible costly repairs that wouldn’t occur with a conventional vehicle.

One remarkable thing about these vehicles is that they keep their owners active on forums trying to figure out how to operate and fix them.
 
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