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Discussion Starter #1
I have been noticing an odd slipping in the transmission sometimes and I was wondering if any of you have had this happen. Sometimes when the car goes from standard to ev mode you will feel the car slip into the mode. The only way I can describe it is like when you engage overdrive in a standard automatic transmission and the transmission slips slowly into gear. Anyone with an old transmission will know what this feels like. This doesn't happen all the time but if all you guys could keep an eye on your dashes and see if you ever notice this reaction when the car engages ev mode during normal driving please let me know.
 

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I haven't heard/experienced this, but am interested in more detail on your experience. When EV mode engages on my car, it's usually after I've lifted my foot from the accelerator. Is this when you also describe the car transitioning from Normal to EV mode?

In theory, overdrive lets you run at lower rpms. I'm wondering if throttle operation range decreases when the car auto-shifts into EV mode, causing the reaction you described?
 

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This whole conversation seems a bit off. In general the engine in never engaged with the wheels. The single speed transmission can't slip because it never engages the wheel except under special circumstances that I can't find defined anywhere. I'm assuming that special condition has something to do with highway speeds and steady state.
 

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Discussion Starter #5
All I can say is I'm driving under cruise control at speeds between 40 and 50 mph. Most of the time when the car turns off the engine and goes into ev mode you barely notice except for sound changes due to the engine turning off, but on occasion, I can literally feel it switching into ev mode and this feeling is exactly the same way it feels when a traditional transmission has trouble engaging it's upper gear or overdrive. In fact it's noticable enough that even with my music playing very loud I can feel it enough that it causes me to look down at my instruments and see if the car is doing anything weird. Just putting it out there to see if anyone has had this issue too. It doesn't happen often, but then again I'm usually playing loud music and being engrossed in it I might not notice it if it does this slightly. I use the header slipping transmission since that's exactly what it feels like and that it might have something you do with the drivetrain.
 

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This whole conversation seems a bit off. In general the engine in never engaged with the wheels. The single speed transmission can't slip because it never engages the wheel except under special circumstances that I can't find defined anywhere. I'm assuming that special condition has something to do with highway speeds and steady state.
Perhaps you were thinking of the attached page/diagram? Engine Direct Drive = high speed, low-load conditions.

There is a change that occurs when going from Engine (direct drive) to EV. It might not be the transmission specifically, but it seems Verdier is trying to describe the change in a way that parallels traditional transmission experience.
 

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Agreed. You can feel a change when going from direct drive to EV mode. Nothing to worry about - it's just a hand off from ICE-connected to electric motors. I've only noticed it on the highway, and it's subtle.
 

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Discussion Starter #8
You're right, it's usually subtle, but for me every once in a while it's far from subtle. Either way I have 120,000 mile warranty so I'm not too concerned, just wondering if others have felt the less subtle version of this. So far it seems like the answer is no.
 

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You're right, it's usually subtle, but for me every once in a while it's far from subtle. Either way I have 120,000 mile warranty so I'm not too concerned, just wondering if others have felt the less subtle version of this. So far it seems like the answer is no.
You might try looking at the power flow screen which will tell ya what is on when this happens.

Most of the time the ICE is disconnected from the wheels and is just making electricity. Some of which flows to the wheels some to the battery. There is a clutch, which engages at highway speed, which connects the ICE directly to the wheels, and disconnects from the generator.
 

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Discussion Starter #13
Well since it's moving from a blank spot to the green ev icon and the gas milage bar rises up to the top I figure it's changing from hybrid (electric motor/IC motor) to pure electric motor on battery power. Maybe it's a slip in the clutch disengaging the IC motor from the wheels. I can try using the power meter on the screen to see if I can catch what the car says it's doing during these instances. As I said it doesn't happen often so I'll see if I can catch it doing it again.
 

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Discussion Starter #15
Well I haven't had any luck figuring this problem out. It seems to happen at expressway speeds now too and I know the moment I put a Honda tech in the car it won't happen. The question I have now is if there is anyone in the state of Maine who might want to take a ride with me in their insight so if I can see if this is a normal behavior I'm getting overly concerned about or if it definitely is a problem. Any mainers out there who'd be willing to meet up?
 

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I vacation in the Boothbay area and plan to come up there from Maryland later this year. If you are on the way or not too far from the coast I can swing by with my Insight if you haven't figured out your issue by then.
 

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I vacation in the Boothbay area and plan to come up there from Maryland later this year. If you are on the way or not too far from the coast I can swing by with my Insight if you haven't figured out your issue by then.
These types of connections are the forum working at its finest! Will be interested in hearing the observations and results from the cross-consultation.
 

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Discussion Starter #18
I vacation in the Boothbay area and plan to come up there from Maryland later this year. If you are on the way or not too far from the coast I can swing by with my Insight if you haven't figured out your issue by then.
I live in the Lewiston area and work in the South Portland area and I'm more than happy to drive to you if necessary on my day off. If I haven't bumped into anyone else by then I'd love to take you on your offer. I drive an hour to work everyday just to be yelled at by customers. I'm more than happy to drive an hour to boothbay to see if I'm paranoid. All I need is a nice 20 or so minutes drive on a 35 to 50 mph road (lots of those in Maine) on cruise control to see if your car does the same. Thank you so much for your offer and when you're in the area you can reach me at [email protected]
 
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