Previous in Forum: Dealing With People from India   Next in Forum: Comparative Ballistics Data for Types of Armor
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
9 comments
Rate Comments: Nested
SSCpal
Guru
Engineering Fields - Engineering Physics - New Member

Join Date: Oct 2006
Location: MSP, MN
Posts: 728
Good Answers: 8

Standalone Drive By Wire Throttle System?

06/09/2011 11:05 PM

The OEM drive by wire throttle systems are integrated with the vehicles ECU. I'd like to put an electronic throttle system in my hot rod, which doesn't have an ECU. Anyone know of such a system or how one might be implemented?
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".
2
Tobugrynbak
Guru

Join Date: Oct 2008
Location: Deepest Darkest Rutherford Oz
Posts: 951
Good Answers: 145
#1

Re: Standalone drive by wire throttle system?

06/10/2011 12:55 AM

I've not heard of a stand alone flyby wire throttle system for retro fitting.

That said, with a bit of investigating you may be able to cobble something together.

The trick is finding a "stepper" controlled throttlebody that you can control "crudely" without an ECU. of course the ecu does more than swing the throttle plate it manipulates the idle control valve, ignition timing and injector firing to provide the best (hopefully) operating condition for the demand.

Thing is that there are a number of "safety" related issues to consider.

First to come to mind is what is the failsafe of the throttle body? The ecu will shut down a motor that doesn't have the right parameters in place, one of those is recognising the throttle is at WOT and the pedal is at idle....

What motor are you using in your hotrod? Is there a flyby wire version you could graft across?

Of course when it comes to these sorts of things "fun costs money how hard do you want to laugh", do you have a budget for this? Do you want to make a kit for other interested hotrodders?

It is do able, but the cost may exceed the benefit.

__________________
 There are two reasons for a man to do a thing, One that sounds good, and the real one...
Register to Reply Good Answer (Score 2)
No more Good Answers.
34point5
Guru

Join Date: May 2010
Location: in optimism
Posts: 4050
Good Answers: 130
#2

Re: Standalone Drive By Wire Throttle System?

06/10/2011 11:53 PM

A cruse control is essentially that. A little bit of surgery on an after market kit and you have one.

Though Why you want to do it is a mystery. It's exciting enough when that little spring breaks.

__________________
 There is no sin except stupidity. (Oscar Wilde, Irish dramatist, novelist, & poet (1854 - 1900))
Register to Reply
ky
Guru
Hobbies - Musician - New Member Australia - Member - Torn and breading Engineering Fields - Nanoengineering - New Member APIX Pilot Plant Design Project - Member - New Member

Join Date: Jun 2006
Location: Magnetic Island, Queensland, Australia
Posts: 3721
Good Answers: 74
#6
In reply to #2

Re: Standalone Drive By Wire Throttle System?

06/11/2011 5:29 PM

maybe this

Watch the Fastest RC Car Break the World Speed Record

__________________
 The Twain Has Met
Register to Reply
Tom_Consulting
Guru
Popular Science - Weaponology - New Member Fans of Old Computers - PDP 11 - New Member Technical Fields - Architecture - New Member Hobbies - HAM Radio - New Member

Join Date: Oct 2009
Location: Maine, USA
Posts: 2168
Good Answers: 71
#3

Re: Standalone Drive By Wire Throttle System?

06/11/2011 8:48 AM

Get in touch with "Painless Performance" - a google will get you there. They are in the business of building wiring harnesses for hot rods...may have something you can use or may be able to advise you. I'm sure your not the first to want to do this!

__________________
 Tom - "Hoping my ship will come in before the dock rots!"
Register to Reply
Deefburger
Guru

Join Date: Mar 2011
Location: Sebastopol, California
Posts: 1205
Good Answers: 54
#4
In reply to #3

Re: Standalone Drive By Wire Throttle System?

06/11/2011 10:46 AM

My question is .... why?

That said, maybe you could make one. The throttle has a spring, so if you have a solenoid that can match the spring at full voltage, then you can use voltage limiting at the pedal to vary the solenoid's pull on the throttle. (analog solution)

Or use a stepper motor and position sensor at the pedal.(digital solution)

Best solution though is to use a cable! That's a wire!(old school solution)

__________________
 Most people are mostly good most of the time.
Register to Reply
SSCpal
Guru
Engineering Fields - Engineering Physics - New Member

Join Date: Oct 2006
Location: MSP, MN
Posts: 728
Good Answers: 8
#5

Re: Standalone Drive By Wire Throttle System?

06/11/2011 5:05 PM

Others say why...I say why not. I like to try new things in my hot rod. I suppose I could lift the whole works, including the ECU, from a junkyard car and just use the throttle function. My engine is a Gen I SBC, with an aftermarket 4-bbl throttle body on the blower and port EFI, so some clunky mechanical interface would be needed. I'll probably stick with the cable.
Register to Reply
WAWAUS
Guru

Join Date: Aug 2010
Location: Melbourne, Australia
Posts: 740
Good Answers: 24
#7

Re: Standalone Drive By Wire Throttle System?

06/13/2011 9:20 PM

An old synchro system would work if you could get one....
Register to Reply
SSCpal
Guru
Engineering Fields - Engineering Physics - New Member

Join Date: Oct 2006
Location: MSP, MN
Posts: 728
Good Answers: 8
#8

Re: Standalone Drive By Wire Throttle System?

06/20/2011 2:21 PM

How about R/C servos? They come in all sizes and powers, have excellent response times and accuracy. I met a guy who runs 1/4 scale sprint cars with them for throttle, steering and brakes. Anyone see a problem?
Register to Reply
Tobugrynbak
Guru

Join Date: Oct 2008
Location: Deepest Darkest Rutherford Oz
Posts: 951
Good Answers: 145
#9
In reply to #8

Re: Standalone Drive By Wire Throttle System?

06/20/2011 3:57 PM

Hmm,

RC Car = GVM 2.5kg, 150watt motor, max velocity 60kph, back yard.

Hot Rod = GVM 2000kg, 250kW motor, max velocity 180kph+, public road.

There's some math to be done but I'd be really concerned about the issue of WOT (wide open Throttle) failure modes and the resultant insurance issues related to that.

__________________
 There are two reasons for a man to do a thing, One that sounds good, and the real one...
Register to Reply
Register to Reply
Have a Different Question?
9 comments

Good Answers:

These comments received enough positive votes to make them "good answers".
Copy to Clipboard

Users who posted comments:

34point5 (1); Deefburger (1); ky (1); SSCpal (2); Tobugrynbak (2); Tom_Consulting (1); WAWAUS (1)

Previous in Forum: Dealing With People from India   Next in Forum: Comparative Ballistics Data for Types of Armor

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
General Discussion:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (88 right now)
Show Members
Advertisement