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Gen 2 Paddle Shifter Question

3.9K views 9 replies 8 participants last post by  Uriel  
#1 ·
I'm fairly new to my 2010, so for those of you experienced with the gen 2 and the paddle shifters I have a question:

If one puts the cvt in "s" mode and goes through the gears as fast as it will let you to keep the mps low, will this help with mpg?
Also is there any harm to the cvt with this method?
thanks!
 
#4 ·
You are in the Gen1 section. That may be reason you can't generate any interest. I'm going to move the thread to the Gen2 section. Maybe you will get some comment there:)
 
#3 ·
I'm a G1 guy, so I don't know. Probably nobody else does, either. I doubt if you'll hurt the CVT. I also doubt if your process will help mileage. You'll have to conduct tests to find out. My wife's G1 CVT seems to do fine all by itself. The revs stay nice and low. When I use the S mode the RPMs climb, and it also uses more assist. This brings on background charge, so it might well be a "pay me now or pay me later" situation. Let us know how it works for you.

Sam
 
#5 · (Edited)
No.

Lowest RPM doesn't necessarily mean highest MPG (even in a non-hybrid) because the quantity of fuel injected per rotation can vary.

If you do this (I've tried) you will tend to just use up the battery faster, which will force recharge.
 
#6 ·
What Uriel said.

I have done some acceleration testing to see what way works best for economy.
The procedure is simple:
Choose a fixed point to accelerate away from. For me that's a T junction on my way to work, engine already warm etc.
Set the MID to instant FE readout and select the trip counter you want to use for your test. I use Trip B.
Switch Climate Control OFF, then stop at your starting point.
AutoStop should be engaged.
Reset your trip counter.
Accelerate away in the fashion you want to test.
When you reach your cruising speed hold steady until you reach your fixed end point, not too close but neither too far from your starting point. Half a mile to a mile would be good.
Read your trip FE readout at the end point.

Repeat for different acceleration strategies, but always use the same cruise speed and start/end points.

What I found is that accelerating slowly in D works best. The lower the revs (when in D!) the better. Anything above 2000 RPM hurts, and it hurts more the higher the revs get - even though the incremental fuel usage is not very big.
You might get 40 mpg on your test stretch when you accelerate at as low an RPM as the CVT allows.
That may sink to 35 mpg when you rev it to 2000 RPM to cruising speed.
Then if you go all the way to 6000 RPM you might still get 30 mpg. It is wasteful to rev that high, but it is over in seconds.

Accelerating at more or less constant revs seems better for fuel economy; I bet the EGR and ignition advance work best with stable revs and load.

S mode can be useful in the mountains to regulate engine braking and it provides audible feedback on speed changes, as it links the revs to a certain speed; so it enhances the feeling of control. I seldom use it.
 
#7 ·
This thing has paddle shifters? :p Oh right I used that once when I bought the car and never used them again. They seem pretty useless being a cvt transmission. I would assume almost 90% that the way your car operates normally gas will be better off never using those, but I could be wrong.
 
#8 · (Edited)
No. Uriel is right.

The only practical reason to use the paddle-shifters I have found is to lower the CVT gearing by one or two increments if you need some additional acceleration/ or you want to manually lower the gearing when going uphill under load to reduce strain on the drivetrain (this sort of works for about 4 seconds, then it reverts itself to the gear position as before).

There is a potential use for engine braking as well, but the need would be so infrequent on anything other than an incredibly steep and slow decent, because under normal driving it would be advisable to make use of long stretches of road for regen without using the brakes, and just using engine braking in the normal 'Drive' mode.

The only other use for the paddle shifters is to manually select 'manual' mode, and is it 'snow' mode, iv'e forgotten as I barely use it - when you want to gradually move off from stationary on a steep upward incline in say traffic when the car is full of people to reduce CVT strain. Unfortunately Honda made this less than intuitive, so I use it less than I would otherwise - but I suppose it could have a protectant effect.

On the plus side, they make for a nice looking addition.
 
#9 · (Edited)
I like paddle shifters. Why? You may as well ask why would anyone want a manual transmission when you could get an automatic.

I know what is coming up ahead. The car's computer does not (yet.) I can anticipate future power demands.

For instance, I'm coming into a turn and then want to accelerate. I downshift for added braking and have the revs up for a nice transition to power out of the corner.

Same thing today with passing. I downshift as I follow and hit the gas as soon as it's clear. I get full battery assist without going to redline.

On a sweeper on in twisties, you can power around without the car bogging down to 2000 rpm every time you lift a little.

Plus, it's just plain fun to floor it and click through the non-gears. So much better than the drone and buzz of the CVT staying at 6000 rpm while the mph slowly climb. That just feels like the clutch is slipping.
 
#10 ·
Oh yeah, I love the paddle shifters. I simply wouldn't have bought the car without them.

It's just that they offer very limited scope for improving fuel economy.