Go Back   EcoModder Forum > EcoModding > General Efficiency Discussion
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 07-21-2016, 02:56 AM   #31 (permalink)
Engine-Off-Coast
 
Natalya's Avatar
 
Join Date: Apr 2016
Location: Atlanta
Posts: 564

Red 2000 Insight (2017 through 2019) - '00 Honda Insight 5MT
90 day: 64.72 mpg (US)

Red 2000 Lithium Insight (2020) - '00 Honda Insight LTO
90 day: 71.76 mpg (US)
Thanks: 224
Thanked 309 Times in 177 Posts
What I'd like to see is a button for EOC to come with the cars, or maybe for them to EOC automatically -- quick shift into neutral and then the engine dies if you're already at speed and you release the accelerator for more than a second or it detects you're going down a hill or something.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 07-21-2016, 08:01 AM   #32 (permalink)
EcoModding Lurker
 
Join Date: Jun 2016
Location: Naples, Fl
Posts: 2
Thanks: 1
Thanked 0 Times in 0 Posts
I rented a 2015 Malibu for a week. The only weird thing was when I stop in a parking spot, it shut off, when I shift to park, it starts so I can turn it off.
It got worse mileage than a 2014 Altima 2.5cvt.
Malibu 32 mpg average, Altima 37 average.
  Reply With Quote
Old 07-21-2016, 07:10 PM   #33 (permalink)
.........................
 
darcane's Avatar
 
Join Date: Aug 2009
Location: Buckley, WA
Posts: 1,597
Thanks: 391
Thanked 488 Times in 316 Posts
Quote:
Originally Posted by MetroMPG View Post
Maybe she just couldn't articulate why it bothers her?

I think I could guess: an engine that stops running unexpectedly? That's a BAD THING (TM) -- I can see that putting fear into a person who doesn't understand the feature or is generally nervous about their safety.

In a lifetime of driving conventional vehicles, an engine that stops running unexpectedly indicates the beginning of a stressful, possibly dangerous and probably expensive situation. It may be hard to overcome that.

Another source of unease: you want to scoot across the intersection but the engine is currently off? That's another BAD THING (TM).
I've driven one of these Malibus.

I'm not adverse to having the engine to turn off and on, I do it manually on my Civic all the time. But I don't like it turning off and on when I don't understand why. And I don't like having the engine off when I want to get moving.

Switching quickly from stopped to accelerating, it takes just a moment for the engine to start and then it lurches awkward. I thought this was awkward and can see this as a reason to dislike the system. Changing my habits slightly eliminated the lurching completely.

Sometimes while stopped, the engine would start again. I never figured out why exactly. It was probably something I was doing, but I'm not sure what.
__________________
Past Cars:

2001 Civic HX Mods

CTS-V

2003 Silverado Mods
  Reply With Quote
The Following User Says Thank You to darcane For This Useful Post:
MetroMPG (07-22-2016)
Old 07-22-2016, 12:51 AM   #34 (permalink)
Master EcoModder
 
Ecky's Avatar
 
Join Date: Dec 2011
Location: New Zealand
Posts: 5,075

ND Miata - '15 Mazda MX-5 Special Package
90 day: 39.72 mpg (US)
Thanks: 2,902
Thanked 2,560 Times in 1,586 Posts
In the Insight, the engine will restart without releasing the brake if 1) battery voltage gets too low, or more commonly 2) if there isn't enough vacuum for braking.
  Reply With Quote
Old 07-22-2016, 10:44 AM   #35 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,527

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 54.46 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car Mirage - '14 Mitsubishi Mirage ES (base)
90 day: 62.14 mpg (US)
Thanks: 4,078
Thanked 6,976 Times in 3,612 Posts
Quote:
Originally Posted by darcane View Post
I don't like it turning off and on when I don't understand why.
Agreed - I would want the system to work predictably. If it shuts off when I'm not expecting or doesn't when I am, it bugs me somewhat.

The same applies to the Prius and my parents' Civic hybrid.
__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 07-23-2016, 02:17 AM   #36 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 12,864
Thanks: 0
Thanked 1,683 Times in 1,501 Posts
Quote:
Originally Posted by darcane View Post
Sometimes while stopped, the engine would start again. I never figured out why exactly.
Maybe to drive the air-conditioner and keep the cabin temperature, or to not leave the engine get too cold to make a restart more difficult.
  Reply With Quote
Old 08-11-2016, 03:01 PM   #37 (permalink)
EcoModding Lurker
 
Vansquish's Avatar
 
Join Date: Apr 2012
Location: Ann Arbor, MI; Madison, WI; Bloomington, IN
Posts: 10

Vansquish - '06 Mazda Mazdaspeed6 Grand Touring
90 day: 32.63 mpg (US)
Thanks: 1
Thanked 3 Times in 3 Posts
As someone who works on stop/start systems, there are a variety of reasons that people don't like them. In short, they are as follows:

1. Loss of certain power assistance features. On cars equipped with hydraulically assisted steering/braking systems rather than electrically-assisted ones, turning the engine off often means losing those power assistance features.

2. Loss (or weakening) of certain comfort features such as A/C, and the like.

3. From the engineering side, one of the major problems is the NVH caused during start-up/shut-down of the driveline. Furthermore, because of the manner in which ICEs function the combustion cycle may stop at any number of different positions during an auto shut-down. As a result, the engine may effectively be flooded in one or more cylinders, it may have an incomplete combustion event on auto-start, and so on. The results of each of these is a lag in start-up and significant NVH.

Depending on the software controls, some of these effects can be mitigated, but frankly, because there are only so many things you can do to speed up an ICE's starting procedure, there will always be some additional NVH and/or lag between start-up and the shut-down state.
__________________
  Reply With Quote
The Following User Says Thank You to Vansquish For This Useful Post:
MetroMPG (06-19-2017)
Old 08-11-2016, 04:22 PM   #38 (permalink)
EV OR DIESEL
 
Join Date: Dec 2007
Location: South Louisiana
Posts: 1,758

FarFarfrumpumpen - '03 Volkswagen Jetta Wagon GLS Premium

Quorra - '12 Tesla Model S P85
Thanks: 57
Thanked 113 Times in 86 Posts
Send a message via AIM to dremd
A buddy had one as a rental in Vegas. It was 4 cylinder impala with stop start. I was ok with it, he hated it with a passion. I had a 4 cylinder turbo charged mustang convertible rental at the time and I did significantly better mpg than him, probably mostly his level of anger with the Chevy though.
__________________
2016 Tesla Model X
2022 Sprinter
Gone 2012 Tesla Model S P85
Gone 2013 Nissan LEAF SV
2012 Nissan LEAF SV
6 speed ALH TDI Swapped in to a 2003 Jetta Wagon
  Reply With Quote
Old 08-11-2016, 04:55 PM   #39 (permalink)
Diesel Driver
 
milesgallon.com's Avatar
 
Join Date: Sep 2009
Location: Finland
Posts: 21

Green Opel - '98 Opel Astra
90 day: 41.96 mpg (US)
Thanks: 1
Thanked 0 Times in 0 Posts
I have a 2014 Ford Mondeo diesel. It has start stop, and even tough I was sure I wouldn't like it, it turned out to be quite ok.

I have a manual so I can choose to not put it in idle if it's just a quick stop and the engine will not stop.

For starting "for no reason" i've noticed if it's hot outside it will start after a short while to keep the A/C going. It's just at the point when I start to feel it's getting a bit hot, the engine starts and the A/C kicks in.

There's some instances though that annoys me, stopping to get the mail, the engine first stops, but then after I open the door it will not automatically start again so I have to start it manually, which feels awkward when I have not turned it off, like it would have stalled.
__________________
Simon

I've done a gas mileage calculator for people that doesn't like to do math. There's also a miles to km converter and some other tools.
  Reply With Quote
Old 08-11-2016, 05:11 PM   #40 (permalink)
EcoModding Apprentice
 
Join Date: Oct 2009
Location: Arab, Alabama
Posts: 176

No nickname - '17 Chevrolet BoltEV Premiere
Thanks: 33
Thanked 27 Times in 16 Posts
I bought a 2008 Malibu Hybrid new in 2009. The belt-alternator-starter is what they called it on that one. When you had the AC in the correct setting and came to a stop, the engine shut off {along with no compressor operation for the AC} and the AC's fan kicked up to full speed to help with the illusion of staying cool. When I lifted my foot from the brake pedal the B-A-S restarted the car so it could go immediately. I enjoyed the start stop feature of the car more than anything else. However, IIRC, the maximum length of time you could sit before the engine restarted was 90 seconds.

Two memories come to mind about that whole setup.

First, I tried to slip my foot off the brake and smash the gas as fast as I could to see if I could beat the restart. I could not. Maybe others are faster that me, but I was trying pretty hard to see if I could beat it to the punch.

Secondly, when it wasn't blazing hot and I would be caught at a long light, as soon as it would run out of time and restart, I would ease off the brakes and let the car roll forward a couple feet and stop again to get it to shut down again. It worked for me.

I got rid of it because I just couldn't stand getting 31 mpg on my easy commute. I could do way better than that in the Saturn I had before that.

__________________
  Reply With Quote
The Following User Says Thank You to gasstingy For This Useful Post:
MetroMPG (06-19-2017)
Reply  Post New Thread






Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com