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Author:
Date:
Subject:
mikshah@gmail.com
2008-07-09 03:20:25
Need advise on approaching an ECU design project.
Hello All,
I'm not sure if my question is relevant to this group. If not, please
guide me.
I'm interested in learning and building an engine injection control
system. I have access to electronics companies who can design as per
theory given.
Specifically this is what I want to do: design a lambda controller
(ECU) that will function in three ways
1. either it will control an actuator valve and thereby control fuel
flow
2. or it will control firing timing of third party injector rail
valves (retrofitted after purchase of vehicle), thereby controlling
fuel flow.
3. it would also help to advance firing of third party injector rail
The inputs to the system shall be RPM, Lambda voltage from a sensor,
TPS(?), Injector firing signals.
My question is how do I approach this project? Where can I find theory
(specifically engine control) that will help me build this system?
The final goals are to have good vehicle mileage and the vehicle must
pass the EURO III emission norms.
Any detail / expert advise would help.
Thanks
Mikshah.
Author:
Date:
Subject:
Scott Dorsey
2008-07-09 10:16:11
Re: Need advise on approaching an ECU design project.
<[email protected]> wrote:
>I'm interested in learning and building an engine injection control
>system. I have access to electronics companies who can design as per
>theory given.
>
>Specifically this is what I want to do: design a lambda controller
>(ECU) that will function in three ways
>
>1. either it will control an actuator valve and thereby control fuel
>flow
>2. or it will control firing timing of third party injector rail
>valves (retrofitted after purchase of vehicle), thereby controlling
>fuel flow.
>3. it would also help to advance firing of third party injector rail
>
>The inputs to the system shall be RPM, Lambda voltage from a sensor,
>TPS(?), Injector firing signals.
>
>My question is how do I approach this project? Where can I find theory
>(specifically engine control) that will help me build this system?
There are existing open source lambda controllers out there, intended
for retrofitting into existing vehicles. The hardware is not very
difficult, in fact you can just use an existing ECU from a major
manufacturer, or copy one. The hard part is the software.
For the most part, the older controllers are just a single loop that
goes through each time, checks the state of the inputs, increments a
timer, then checks to see if the timer value matches a derived value and
fires the appropriate plugs or injectors when it does. The derived values
are recalculated when a crankshaft position sensor pulse is read.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."
Author:
Date:
Subject:
Thomas Tornblom
2008-07-09 14:46:38
Re: Need advise on approaching an ECU design project.
Author:
Date:
Subject:
N8N
2008-07-10 15:02:48
Re: Need advise on approaching an ECU design project.
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