Go Back   EcoModder Forum > EcoModding > Hybrids
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 01-16-2017, 01:50 AM   #1 (permalink)
EcoModding Lurker
 
Join Date: Nov 2014
Location: Austin TX
Posts: 60
Thanks: 17
Thanked 11 Times in 8 Posts
Engine temps and ambient temps

I'm curious what ambient temp is the threshold where a hybrid like a gen 2 Prius can stay warm enough in city driving, so that it does not need to run just for the sake of keeping itself warm enough.

Does anyone have data on this?

I realize since I am in central TX, engine warming mods are not an area to put time into, and can be risky.

But I think i'm still going to install my own temp sensor on the engine block and see how it reacts. We do have some cold days in the winter where a simple adjustable lower grill block could be beneficial. I drove 2 miles this morning where we had a low near 50, and I got 28mpg. The nice thing about here is that most of the year it will only take a minute or two for the engine to warm up.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 01-16-2017, 08:56 AM   #2 (permalink)
Master EcoModder
 
skyking's Avatar
 
Join Date: Apr 2011
Location: Tacoma WA
Posts: 1,193

Woody - '96 Dodge Ram 2500 SLT
Team Cummins
90 day: 23.82 mpg (US)

Avion and Woody - '96 Dodge/Avion Ram 2500/5th wheel combo
90 day: 15.1 mpg (US)

TD eye eye eye - '03 Volkswagen Beetle GLS
90 day: 49.05 mpg (US)

Mule - '07 Dodge Ram 3500 ST
Thanks: 453
Thanked 435 Times in 277 Posts
rather than install a temp sensor, just get a bluetooth OBDII adapter, grab an old android phone and use Torque or other app. You can get a wealth of data from the computer. It has coolant and other temperatures there for you to read.
__________________




2007 Dodge Ram 3500 SRW 4x4 with 6MT
2003 TDI Beetle
2002 TDI Beetle

currently parked - 1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears
  Reply With Quote
The Following 3 Users Say Thank You to skyking For This Useful Post:
Daox (01-16-2017), ThermionicScott (01-16-2017), veloman (01-16-2017)
Old 01-16-2017, 09:33 AM   #3 (permalink)
Rat Racer
 
Fat Charlie's Avatar
 
Join Date: May 2011
Location: Route 16
Posts: 2,764

Al the Third, year four - '13 Honda Fit Base
Team Honda
90 day: 40.91 mpg (US)
Thanks: 861
Thanked 1,005 Times in 656 Posts
Yeah, you've just got to be able to read the sensor you've already got.
__________________

Quote:
Originally Posted by sheepdog44 View Post
Transmission type Efficiency
Manual neutral engine off.100% @MPG <----- Fun Fact.
Manual 1:1 gear ratio .......98%
CVT belt ............................88%
Automatic .........................86%

  Reply With Quote
Old 01-16-2017, 12:42 PM   #4 (permalink)
Master EcoModder
 
vskid3's Avatar
 
Join Date: Jun 2008
Location: Utah
Posts: 716

Civic DX (sold) - '97 Honda Civic DX
90 day: 34.15 mpg (US)

GTO (sold) - '04 Pontiac GTO
90 day: 22.62 mpg (US)

Green Brick (sold) - '06 Ford Escape Hybrid
90 day: 31.93 mpg (US)
Thanks: 119
Thanked 174 Times in 137 Posts
All depends on what kind of grill block you're running, the driving you're doing, and how much heat you're taking for the cabin. My Prius has a full grill block and still only gets to 150-160F driving around town when it's 30F out (this is usually with some cabin heat and pretty short trips). Doing 80MPH in the 30s gets coolant temps of ~203F, which is definitely on the higher end. Coolant temps are even high going more reasonable freeway speeds, so I take out half of one of the pieces of pipe insulation in the top grill (leaving 3/4ths of the top still blocked) if I'm going to be driving far in the 30s+. At 20F or lower, it'll stay at around 190F doing 80MPH with the full block.

With your higher winter temps, I wouldn't do a full block unless you're only doing short trips. Lower grill block should be fine, though, I was able to run one most of the year when I was in El Paso. Definitely get a Scangauge, Ultragauge, or bluetooth adapter with Torque app to monitor the coolant temps to stay safe when blocking the grill.
__________________
Current cars:

Prius Mod Thread

E-Bike Thread
  Reply With Quote
Old 01-16-2017, 12:54 PM   #5 (permalink)
...beats walking...
 
Old Tele man's Avatar
 
Join Date: Jul 2009
Location: Tucson, AZ
Posts: 5,778
Thanks: 145
Thanked 1,283 Times in 956 Posts
The *problem* with 'grill blocks' in a Prius is NOT with the engine coolant temperature, but rather with the co-located, solid-state, electronics controller for the traction battery.
__________________
2014 Toyota Prius 1.8L eCVT
2009 Pontiac Vibe 1.8L/SFI 4A
2004 Pontiac Vibe 1.8L/MFI 4A

2011 Chevrolet LTZ Cruze 1.4LT 6A
1971 Dodge Charger 318 3A
1970 Plymouth AAR 'Cuda 340/6BBL 4M
1968 Dodge Charger 383 3A
1967 Plymouth Barracuda Formula S 383 4M
1965 Plymouth Barracuda Formula S 273 4M
  Reply With Quote
The Following User Says Thank You to Old Tele man For This Useful Post:
skyking (01-16-2017)
Old 01-16-2017, 01:49 PM   #6 (permalink)
Master EcoModder
 
skyking's Avatar
 
Join Date: Apr 2011
Location: Tacoma WA
Posts: 1,193

Woody - '96 Dodge Ram 2500 SLT
Team Cummins
90 day: 23.82 mpg (US)

Avion and Woody - '96 Dodge/Avion Ram 2500/5th wheel combo
90 day: 15.1 mpg (US)

TD eye eye eye - '03 Volkswagen Beetle GLS
90 day: 49.05 mpg (US)

Mule - '07 Dodge Ram 3500 ST
Thanks: 453
Thanked 435 Times in 277 Posts
Quote:
Originally Posted by Old Tele man View Post
The *problem* with 'grill blocks' in a Prius is NOT with the engine coolant temperature, but rather with the co-located, solid-state, electronics controller for the traction battery.
Do you get a temp for that from OBDII?
__________________




2007 Dodge Ram 3500 SRW 4x4 with 6MT
2003 TDI Beetle
2002 TDI Beetle

currently parked - 1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears
  Reply With Quote
Old 01-16-2017, 01:54 PM   #7 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 9,922

CM400E - '81 Honda CM400E
90 day: 53.89 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 38.47 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 56.19 mpg (US)
Thanks: 1,475
Thanked 1,841 Times in 1,140 Posts
I run a near full block on my Prius year round. In winter it is a full block. Its never been a problem.
__________________
Current project: Automatically actuated grill block
  Reply With Quote
Old 01-16-2017, 03:10 PM   #8 (permalink)
Master EcoModder
 
vskid3's Avatar
 
Join Date: Jun 2008
Location: Utah
Posts: 716

Civic DX (sold) - '97 Honda Civic DX
90 day: 34.15 mpg (US)

GTO (sold) - '04 Pontiac GTO
90 day: 22.62 mpg (US)

Green Brick (sold) - '06 Ford Escape Hybrid
90 day: 31.93 mpg (US)
Thanks: 119
Thanked 174 Times in 137 Posts
Quote:
Originally Posted by skyking View Post
Do you get a temp for that from OBDII?
You can, but you need to use X-Gauges with a Scangauge or custom PIDs with Torque. You can also use a mini-VCI adapter that plugs into a laptop, which is the same thing the dealer uses, so it's great for troubleshooting and certain maintenance procedures.

I'm just using an Ultragauge in my Prius, so I just have to hope for the best when it comes to the inverter temp. I have the snorkel removed from the airbox, so my intake temp should be pretty close to the under hood temp. The highest I've seen was 90 or 100F for the intake with the full block. I'll have to bring my laptop and mini-VCI with me on my next trip and see how the inverter temps look.
__________________
Current cars:

Prius Mod Thread

E-Bike Thread
  Reply With Quote
The Following User Says Thank You to vskid3 For This Useful Post:
skyking (01-16-2017)
Old 01-16-2017, 05:54 PM   #9 (permalink)
EcoModding Lurker
 
Join Date: Nov 2014
Location: Austin TX
Posts: 60
Thanks: 17
Thanked 11 Times in 8 Posts
It's extremely rare that it's cold enough to need to use cabin heat. Maybe if it's below 40 degrees. There won't be many mornings that cold.

My typical usage is a lot of city driving and 5-13 jobs each day where the car will sit for 15-40 minutes typically. A fair bit near an hour, so the engine does cool down a bit on cooler days. Today the engine ran (in my mind) excessively when exiting a parking space/lot.

I'll buy a bluetooth obd2 reader, sounds like a good idea. I wanted engine rpms too.
  Reply With Quote
Old 01-16-2017, 06:24 PM   #10 (permalink)
ScanGauge <3
 
Join Date: Dec 2016
Location: CID
Posts: 258

Winter Sacrifice - '96 Subaru Outback
Subaru
90 day: 24.6 mpg (US)
Thanks: 129
Thanked 82 Times in 60 Posts
Hobbit curates a pretty good article about the stages of operation for the Prius: http://techno-fandom.org/~hobbit/cars/five-stages.txt

That might help explain why it'll kick on the engine, even in times where you might think it shouldn't need to.

__________________



Best tank (so far): 32 MPG
  Reply With Quote
The Following 2 Users Say Thank You to ThermionicScott For This Useful Post:
veloman (01-16-2017), vskid3 (01-17-2017)
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com