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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 08-25-2016, 05:00 AM   #1 (permalink)
EcoModding Lurker
 
kurzer's Avatar
 
Join Date: Dec 2011
Location: Germany
Posts: 83

Knut - '07 Toyota Prius
90 day: 50.9 mpg (US)

Santa - '00 Hyundai Santamo
90 day: 29.07 mpg (US)
Thanks: 51
Thanked 34 Times in 22 Posts
DIY engine stop/start, with clutch + throttle switch restart

Quote:
Originally Posted by Phantom View Post
Has anyone added start stop to a vehicle?
thats what i did twice. the first attempt was a Daihatsu Move. Manuell ignition kill switch. restart when clutch and throttle are pressed the same time.


second attempt is my Hyundai Santamo. The kill switch is now right hand operation and cuts the injection. And it is self holding. Way better, for engine braking, as deep down as you want. a little slower at restart. i countered this witch a hypersensible throttle switch.

the simple kill switch alone makes about 90% of the trick in my case. the self restart is barely used and avoidable. at the end of the last video is shown a stop without a restart.


i used the build in injection relais to kill the engine. thats the first step.

second is restart, the technik is simple. a circuit:
12v batterie - throttel - clutch - service switch - relais coil - 12v alternator

messure out the thin pin at the alternator, witch goes from 0v to 12v when the engine is running. the 0v are basicaly ground. so the relais is operating when the engine is not turning and all switchen are closed. this relais leads 12v to the starter. done.

__________________
kurzer Gruß

Prius II
Hyundai Santamo
  Reply With Quote
The Following 5 Users Say Thank You to kurzer For This Useful Post:
Ecky (08-25-2016), Jurgis (06-19-2017), me and my metro (08-27-2016), MetroMPG (08-25-2016), MJamson (06-19-2017)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 08-25-2016, 01:01 PM   #2 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,321

Blackfly - '98 Geo Metro
Team Metro
90 day: 67.58 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 38.25 mpg (US)
Thanks: 1,980
Thanked 4,688 Times in 2,347 Posts
kurzer -- very interesting. I think I like that clutch/accelerator restart.

Do you have a dedicated thread documenting this project?
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



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 08-25-2016, 04:19 PM   #3 (permalink)
EcoModding Lurker
 
kurzer's Avatar
 
Join Date: Dec 2011
Location: Germany
Posts: 83

Knut - '07 Toyota Prius
90 day: 50.9 mpg (US)

Santa - '00 Hyundai Santamo
90 day: 29.07 mpg (US)
Thanks: 51
Thanked 34 Times in 22 Posts
sorry, there is no thread about it. but feel free to ask, i´ll try my best to explain.

the clutch+Throttle restart works verry well, indeed. i put the car in gear and wait for green. the normal feet movment starts the engine at the latest possible moment.
__________________
kurzer Gruß

Prius II
Hyundai Santamo
  Reply With Quote
Old 06-19-2017, 04:45 AM   #4 (permalink)
EcoModding Lurker
 
Jurgis's Avatar
 
Join Date: Jun 2017
Location: Germany
Posts: 6

ecoDrudge - '07 Ford Fusion EU 1.6 TDCi
90 day: 73.75 mpg (US)
Thanks: 1
Thanked 0 Times in 0 Posts
kill switch

Quote:
Originally Posted by kurzer View Post
thats what i did twice. the first attempt was a Daihatsu Move. Manuell ignition kill switch. restart when clutch and throttle are pressed the same time.

second attempt is my Hyundai Santamo. The kill switch is now right hand operation and cuts the injection. And it is self holding. Way better, for engine braking, as deep down as you want. a little slower at restart. i countered this witch a hypersensible throttle switch.

the simple kill switch alone makes about 90% of the trick in my case.
Hello Kurzer,
I'd like to install a kill switch too. Today I stop the engine while driving by switching ignition off by turning the key for two seconds. Not a safe way. It happend that in a situation of heavy traffic I forgot to switch it on again and wondered why the engine won't start again. The other point is that everytime the ignition is off the light goes off too.
Imagine someone is behind you and once a minute his light goes off for 2 or 3 seconds. Even more trouble if the Police realizes that. Until now I was lucky but one day ...

The reason why I didn't install this kill switch (or better said ignition off pushbutton) is that I have no idea which cable I have to cut. To mount a relay and a switch isn't a problem for me.

As my car has a manual gear it's rather easy to start the engine again as far as the car is still rolling or just by key after long stops at the traffic light.
__________________
Hypermiler in Northern Germany
vehicle: Ford Fusion EU 1.6TDCi at 72 mpg
  Reply With Quote
Old 06-19-2017, 01:02 PM   #5 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,321

Blackfly - '98 Geo Metro
Team Metro
90 day: 67.58 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 38.25 mpg (US)
Thanks: 1,980
Thanked 4,688 Times in 2,347 Posts
moved to dedicated thread

Hi kurzer -

I moved the discussion of your project into this new thread.

(Note, it was previously inside: Saw first non-hybrid (Malibu) with engine stop/start. Why do people hate stop/start? )

---

I have a question too: how does the clutch+throttle switch control how long the starter is engaged?
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



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 06-19-2017, 01:20 PM   #6 (permalink)
Master EcoModder
 
Join Date: Jan 2017
Location: Istanbul
Posts: 288
Thanks: 21
Thanked 21 Times in 18 Posts
What are the options for us guys with automatics?
  Reply With Quote
Old 06-19-2017, 01:47 PM   #7 (permalink)
EcoModding Lurker
 
kurzer's Avatar
 
Join Date: Dec 2011
Location: Germany
Posts: 83

Knut - '07 Toyota Prius
90 day: 50.9 mpg (US)

Santa - '00 Hyundai Santamo
90 day: 29.07 mpg (US)
Thanks: 51
Thanked 34 Times in 22 Posts
@ Jurgis without the wiring diagram no one can say. but u better go for the injection relay than the ignition. otherwise the fuel is still dripping...

Quote:
Originally Posted by MetroMPG View Post

I have a question too: how does the clutch+throttle switch control how long the starter is engaged?
the alternator pin went from 0v to 12v when the engine is running. so we have 12v at both ends of the relais coil. thats a 0v difference, so the relais is released and the starter stops. this is faster than the drivers hand can be.

jic: when the alternator fails and the starter will not stop, u have to open the service switch.
__________________
kurzer Gruß

Prius II
Hyundai Santamo
  Reply With Quote
The Following 2 Users Say Thank You to kurzer For This Useful Post:
California98Civic (06-19-2017), MetroMPG (06-19-2017)
Old 06-19-2017, 03:12 PM   #8 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 4,044

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 64.14 mpg (US)

Black and Red - '00 Nashbar eBike custom built
90 day: 3671.43 mpg (US)
Thanks: 1,437
Thanked 1,124 Times in 745 Posts
Quote:
Originally Posted by kurzer View Post
@ Jurgis without the wiring diagram no one can say. but u better go for the injection relay than the ignition. otherwise the fuel is still dripping...



the alternator pin went from 0v to 12v when the engine is running. so we have 12v at both ends of the relais coil. thats a 0v difference, so the relais is released and the starter stops. this is faster than the drivers hand can be.

jic: when the alternator fails and the starter will not stop, u have to open the service switch.
That's pretty damned smart, but it might force a few hypermilers to adapt their kiss-starting clutch technique a little. I don't know about you all, but I suspect my gas pedal gets a tap as I raise the clutch pedal a little for clutch/flywheel contact.
__________________


See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

  Reply With Quote
Old 06-19-2017, 05:22 PM   #9 (permalink)
EcoModding Lurker
 
kurzer's Avatar
 
Join Date: Dec 2011
Location: Germany
Posts: 83

Knut - '07 Toyota Prius
90 day: 50.9 mpg (US)

Santa - '00 Hyundai Santamo
90 day: 29.07 mpg (US)
Thanks: 51
Thanked 34 Times in 22 Posts
true egnough. sometimes i hit the gas unintended and the starter kicks in. sometimes on purpose, but normally i double clutch for restart. that is the softest rolling restart possible.
__________________
kurzer Gruß

Prius II
Hyundai Santamo
  Reply With Quote
Old 06-20-2017, 02:05 PM   #10 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 4,983
Thanks: 0
Thanked 458 Times in 408 Posts
So, can you restart it pressing only the throttle in case the engine stalls?

  Reply With Quote
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