Last post on Jan 08, 2012 at 6:49 PM
You are in the Toyota Highlander Hybrid
What is this discussion about?
Toyota Highlander Hybrid, Fuel Efficiency (MPG), SUV
#75 of 447 Re: battery and charging question and mileage question [mmreid]
Aug 28, 2005 (1:21 pm)
Godspeed to all of you avoiding Katrina and the Waves.
I've not done much 12v charging with the HH but, as has been discussed, the battery is hopelessly undersized. If you want to do anything with 12v, you better get a bigger battery and move the WW fluid spout to accommodate this.
When we were doing serious travel with electronics we had two batteries in the 4R, which could be disconnected to stop drain from each other. We even had a solar panel to recharge when camped a long time. There's not enough space under the HH hood.
Cigarette lighters are normally connected with tiny wires and fuses and it's always better to direct connect to the battery. I had heavy-duty cables coming from a battery to the inside of the car for this.
The NAV screen in motion has been solved.
darmock, "2006 Hybrid Toyota Highlander" #1100, 31 Jul 2005 7:18 pm
Plug-in is going to be answer for a lot of problems. On a short morning run I do with my wife, I've been experimenting with turning off the engine and gliding in neutral to stop signs. It's absurd but I can't stand to see the engine revving just to charge the batteries.
Aug 31, 2005 (7:21 am)
Has anybody out there actually timed how long your engine warms up for? I understand the idea is to warm up the catalytic convertor to reduce emmisions. My ICE stays on for a consistent 1 minute and 57 seconds. This is dragging down my mpg because the majority of my trips are less than ten minutes(my commute is only 4 miles.) I have been getting about 25 mpg with my awd ltd on short trips but have gotten in to the mid forties with 30-40 mile trips. The average temperature here is about 75 in the morning and I am wondering if the winter will cause even longer warm-up times. Why can't the exhaust simply warm when the ICE is used? It seems a bit wasteful to burn gas just to warm up the convertor.
I saw another poster mention a 30 second warm-up but was not sure if that was a guess or an actual time.
#77 of 447 Re: ICE warm-up times [johnnyroaster]
Aug 31, 2005 (9:53 am)
We did a quick experiment on our HH and found the following:
1. The ICE of our HH comes on for 30 seconds every AM upon start-up. This is timed.
2. Our HH's on-board MPG indicator value did not change after this 30 sec. run.
3. On one AM last week, the traction battery had only 2 pink bars left and the ICE stayed on for a good long while charging until traction battery showed 3 blue bars, then it shut off.
4. For this charging while sitting idle, on-board MPG indicator dropped from 28.3 to 28.1 MPG.
5. We failed to time length of this charging run, .
In general, we get rolling upon start-up "READY" so the car is already moving even when the ICE is on warming up for those first 30 seconds. We do not believe 30 seconds is too bad in the larger sense but whatever it takes to squeeze in that extra mile .
#78 of 447 Kind of stuck with that aren't we?
by PFFlyer@Edmunds HOST
Aug 31, 2005 (7:56 am)
After all, the converter is warmed up by the exhaust gases. There's really no way around that. I imagine that that's about the most efficient way to get the converter up to operating temperature.
#79 of 447 Re: Kind of stuck with that aren't we? [pf_flyer]
Aug 31, 2005 (8:26 am)
Does it make a difference whether the converter is warmed up sitting in the driveway or on the road? It seems to me that more or less the same amount of pollution results, but gas is wasted while it's in the driveway.
#80 of 447 Re: Kind of stuck with that aren't we? [markrsmith83]
by PFFlyer@Edmunds HOST
Aug 31, 2005 (9:11 am)
I don't think I'd sit still waiting for the converter to warm up. Only seems to make sense to get the vehicle moving.
Think of it this way... you're going to burn X amount of gas to warm that converter up. The converter doesn't know or care if the vehicle is moving or not. It just needs enough hot exhuast gas to get itself heated. If you sit still, you'r going to get 0 mpg for that X amount of gas. If you manage to go a mile or so, you'll have a postitive number.
The emissions will be the same, but you'll be further towards where you're going.
#81 of 447 Re: Kind of stuck with that aren't we? [pf_flyer]
Aug 31, 2005 (9:46 am)
Just to make things clear, I am not sitting in my driveway waiting for the ICE to shut off. I only have one short stretch of less than a half mile that is over 30mph on my commute to work. I can make it to work without even using the ICE if I had to and nobody was behind me. My first two miles has a 25 mph limit, so in my case the ICE is running needlessly.
If anybody has the time, just see how long it takes in the morning or from a cold start from when the ICE kicks in to when it shuts off with the HH in the driveway. Make sure there are no extra drains on the system like AC and the battery is about 2/3 full.
#82 of 447 tune ups and oil changes and a cruise control question
Sep 10, 2005 (6:13 am)
Both the dealer in Nashville, TN where I purchased my HH and the dealer here in Florida told me 5,000 miles for service and oil change. OR every six months. Since I put so few miles on a vehicle in a year, I end up usually doing the every six months oil change.
The guys on Car Talk recommend that too (if you are a low mileage person).
We are taking the HH back up to Nashville next week to babysit the grandkids for a week and it is a mixture of interstates 10 and 65 and rural highway (Hwy 231 in Alabama which takes you through small towns and lots of traffic lights at times). Any suggestions as to using cruise control or not using it? I've not been in a situation to really check out whether using the cruise control increases or decreases mpg. This is the first real trip the vehicle will be taking since we bought it and were told not to use the cruise bringing the car back to Florida. It is about a 1,000 mile round trip, not counting any driving we do in Nashville (which is nice and hilly and I'll get a lot more chances to check out pulse and glide). Any and all suggestions appreciated. It's also going to be our 2 yr old dog's first big road trip too. We always took husband's car on road trips but as gas prices soar, the HH makes a lot more sense plus even a thousand mile road trip once or twice a year still doesn't add up to a lot of miles for me when my commute to work is a walk to my studio. Right now the HH has 1900 miles on it. . .and I've had it three months.
#83 of 447 Re: tune ups and oil changes and a cruise control question [mmreid]
Sep 10, 2005 (8:27 am)
The cruise control has worked well for us. It has been able to do better on MPG on a few stretches of our local freeways. With cruise control, the on-board MPG shows 28-35 MPG for a 10-mile stretch while I can only do around 24-28 on the same stretch if I use my heavy foot.
The only time we do not use cruise is climbing a steep freeway grade when there is traffic. The HH will move too fast while there are cars slowing on the climb.
Have a safe trip!
#84 of 447 Cruise control.....
Sep 10, 2005 (8:40 am)
Having and using cruise control is somewhat comparable to having an autopilot in an airplane. Cruise control allows you to concentrate on other things that are of importance. I find that setting my cruise control allows me to more easily drive ~500 miles a day and at the end of the day I am a whole low less stressed out, more relaxed.
I get better than 28 MPG in my Porsche C4 at a consistent 75 MPH. 22 MPG in my 2001 AWD RX300 at ~65.