Pulse & Glide vs Cruise Control - a study

[Dan.]

OK... Jumping on board here.

I usually don't do a 15 mph dV. My largest dV is about 22 kph. Dropping below 30 kph gets the gearing a bit to low for my likes (I know eCVT). In competition, I believe I slacked my window to a bottom out at 25 kph, but I probably unconsciously wiggled it back up to 30 kph pulse entry.

My smallest dV is usually around 4 kph. As mentioned before pulse RPM, IGN, and TPS should all be noted. dSoC is also critical.

As a side note I've emailed Texas World Speedway to see about securing some track time. I know they rent it out to speed freaks who want to zip around at 120 without fear of a ticket.

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[nerfer]

Originally Posted by Dan.

OK... Jumping on board here.

I usually don't do a 15 mph dV. My largest dV is about 22 kph. Dropping below 30 kph doesn't getting the gearing a bit to low for my likes (I know eCVT). In competition, I believe I slacked my window to a bottom out at 25 kph, but I probably unconsciously wiggled it back up to 30 kph pulse entry.

My smallest dV is usually around 4 kph. As mentioned before pulse RPM, IGN, and TPS should all be noted. dSoC is also critical.

As a side note I've emailed Texas World Speedway to see about securing some track time. I know they rent it out to speed freaks who want to zip around at 120 without fear of a ticket.

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I thought the range in speeds was a bit wide also. P&G is best for rolling hills, from what I've read, CC better for the flats. I want to do some tests at some point based on terrain, when I get the chance (and nice warm weather so I know I'll actually glide).

[Dan.]

Originally Posted by Dan.

As a side note I've emailed Texas World Speedway to see about securing some track time. I know they rent it out to speed freaks who want to zip around at 120 without fear of a ticket.

TWS is interested if anyone wants to fly down to Texas. They haven't quoted rates yet. They are still just interested in finding out more about what our needs are. I have a MMH and a Prius. I can probably muster up a TCH and possibly an Insight if we wanted a broader testing. I could talk to some of the local dealers if anyone has some other models they think might be interesting.

I'll report back with the rates. Pointless unless the rates are reasonable.

TWS: Texas World Speedway

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[diamondlarry]

I have been playing around with deltas of ~5 mph or so and they seem to work best so far. Like Jim, I'm having trouble finding good weather on days that I'm off work. Most of the roads around my area have a stop sign every mile with a few areas of 2-5 miles between stops. On the 1-mile stretches, I usually pulse to 35-40 mph(sometimes maybe only 30) and can glide to the next stop. The only time I like to go below 30 mph is when I know a stop is coming up. As for what little experimentation I've done with cc, I can't even come close to the FE numbers I get with P&G even on the flats. I just got back from my mom's(5.1 miles) and was able to pull into my driveway with 124 mpg showing on my SG2 by P&G'ing to a high of 40 mph and gliding to as low as 30 unless I was coming to a stop sign. A week ago this Friday, I had 132 mpg on a 5.2 mile trip from my Church to home. SoC was at 6 bars from beginning to end. Also, my SG2 is currently reporting my tank at 75.8 after 449.1 miles. Just in case you're wondering about the SG's calibration, my last fill showed at 5.85 gallons and the pump showed 5.9 gallons. Sorry for the rambling.

[JimboK]

Dan and Larry: What are your typical acceleration rates as measured by RPM?

[diamondlarry]

Originally Posted by JimboK

Dan and Larry: What are your typical acceleration rates as measured by RPM?

I will have to start keeping a closer eye on the rpm's but, it seems to me that 1700 rpm's is on the high side. Probably closer to the 1500 range. I'll watch it tomorrow.

[Dan.]

Originally Posted by JimboK

Dan and Larry: What are your typical acceleration rates as measured by RPM?

That's more of a battery maintenance question than a P&G question. If I'm planning an EV stretch in the next 5 miles I pulse slow (1400 RPM). If I need to bleed off some charge I'll EV. I will also use low speed pulses to heat up the engine if needed. On a deserted road I will usually pulse in the high 14k to low 16k range. Most of the time I'm chasing IGN. I always want to pulse with IGN at either 14 or 15 except in the cases noted above. Sometimes IGN will stick at 17 and you have to lure it down by dropping RPM way low (high 13k).

In the end the RPM comes into the strategy part of the drive. Just depends on what I'm gonna need in the next 10 miles. When I did my HF run I had it pegged at 1600 RPM. I'd consider 1590 to 1610 optimal assuming a 30 kph to 54 kph window. To me it's pointless to go over 54 kph if your playing for high score.

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[ericbecky]

Originally Posted by efusco

Eric, what about a panel discussion format. Sounds like we've got a couple people who are on similar thought processes...have them limit their data presentations to 10 min or so then have a panel discussion of techniques with them and other experts...Wayne Gerdes of course, Jimbo, Dan, Doc, maybe one or two more. Perhaps the sub-goal could be to create an 'ideal' study design that could be reproduced by multiple people at home and then that data compiled...

I really like the idea! Anyone wanna' volunteer to plan this?
I have two hotel conference rooms (1 larger, one smaller) rented for Sunday morning from 8-noon and I'll take care of getting them set up.

I just need someone to "take the bull by the horns" and line up the willing participants for the panel, as well as a moderator (in case things get too unruly. )

PM me email, or give me a call.

[ericbecky]

Doc Willie is still offering to do his presentation.
Does anyone else want to get in on being a part of a panel discussion on this Sunday morning at the hotel?
PM me ASAP if you are.

[efusco]

Originally Posted by ericbecky

Doc Willie is still offering to do his presentation.
Does anyone else want to get in on being a part of a panel discussion on this Sunday morning at the hotel?
PM me ASAP if you are.

Eric called me today and I'm going to be on the panel.