ICE runs after going down a hill at the beginning of my drive.

  • Thread starter Thread starter Highland58
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K8QM: I feel ashamed to mention my "test" after reading yours, which are much more comprehensive :-).
 
@oko No - I just am the doofus who'll take that much time.

@bobcubsfan - If I lived anywhere close to you I would drive over, have a beer while we charged our Clarities and then try to figure out what's going on with your car!

geo
 
Our house is 32 miles from LAX. The drive there takes anywhere from 45 minutes to 2 hours. Why? It is predictably unpredictable. Debris on the road. Accidents. Street repair. There are too many variables to solve the equation. That is how I feel about the ICE issue. In electronics, if you can find the "smoking resistor" you can fix the device. Intermittences are the worst.
 
I have a new acronym: RIB. Random ICE Behavior. My wife got RIBed this morning. Her crime? She stepped on the brake.
 
I have a further report on this, I went on a longer drive in the mountains that involved some long down hill stretches. I was using HV mode when on the highway when on more level stretches and up hills. When on a downhill stretch I was in normal EV mode, until the EV range displayed as 60 miles, then went back into HV mode. Even in HV mode the ICE stayed off while going downhill, my range was up to 67 miles at one point. My theory previously that the ICE went on because the battery was full apparently did not hold water, as this did not happen even when the range was up to 67 miles. I can only speculate that I was past the normal full charge of 14kwh more towards the rating of 17kwh for the battery. I ran the battery down to about one mile range before I got home and charged it. My Juicebox app show it added 14.09kwh hours after that, HondaLink now says I have 68 miles EV range, and the dashboard display says I have 68.7 miles range. I wonder how accurate that is...
 
I am beginning to suspect engine temperature as the culprit. But, yesterday, started out in Sport mode. Used the - toggle to get 4 chevrons. The car's computer set it back to 3 chevrons. Maybe to avoid ICE coming on?
 
bobcubsfan said:
I am beginning to suspect engine temperature as the culprit. But, yesterday, started out in Sport mode. Used the - toggle to get 4 chevrons. The car's computer set it back to 3 chevrons. Maybe to avoid ICE coming on?
Click to expand...

The only times I see it reverting to three from four is if you are travelling over 55mph. I think above that speed, the amount of current flowing from four chevrons of regen must be above an allowable threshold Honda has established.
 
Highland58 said:
I have a further report on this, I went on a longer drive in the mountains that involved some long down hill stretches. I was using HV mode when on the highway when on more level stretches and up hills. When on a downhill stretch I was in normal EV mode, until the EV range displayed as 60 miles, then went back into HV mode. Even in HV mode the ICE stayed off while going downhill, my range was up to 67 miles at one point. My theory previously that the ICE went on because the battery was full apparently did not hold water, as this did not happen even when the range was up to 67 miles. I can only speculate that I was past the normal full charge of 14kwh more towards the rating of 17kwh for the battery. I ran the battery down to about one mile range before I got home and charged it. My Juicebox app show it added 14.09kwh hours after that, HondaLink now says I have 68 miles EV range, and the dashboard display says I have 68.7 miles range. I wonder how accurate that is...
Click to expand...

Would need to see more cases like this to disprove our previous theory. To say you were at 67 miles when the ICE did not turn on and then you charged to 68.7 seems to indicate the battery was not at 100% at 67. Plus, you did not confirm that you initiated regenerative braking via paddle engagement during these downhill segments with a very full battery. Our previous theory has been battery fully charged AND user initiation of regen via paddle pull. I've even had cases where, with battery fully charged, I engaged one level of paddle regen (before remembering not to) and ICE did not trigger.
 
Steven B said:
Would need to see more cases like this to disprove our previous theory. To say you were at 67 miles when the ICE did not turn on and then you charged to 68.7 seems to indicate the battery was not at 100% at 67. Plus, you did not confirm that you initiated regenerative braking via paddle engagement during these downhill segments with a very full battery. Our previous theory has been battery fully charged AND user initiation of regen via paddle pull. I've even had cases where, with battery fully charged, I engaged one level of paddle regen (before remembering not to) and ICE did not trigger.
Click to expand...
I did use the regen paddle several times, sometimes with brakes + regen. I normally get about 50 - 52 miles range after a charge. The amount of kwh applied by my charger when charging from 0 or near 0 has been around 14kwh. The rephrase, my charger says it added 14kwh from 0 to 50 miles previously, and now says it added 14kwh from 1 to 68.7 miles after my last charge.
 
I can tell you for a fact that for me immediately after a full charge I always get limited regen for at least the first 3-5 miles or so in EV, shifter initiated regen blinks and reverts to 2 bars and brake pedal will not increase the amount of regen as it normally does.
Again, we all assume it’s to protect the battery from overcharging.
 
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