question about ds4 and db4 pumps

[dyoung14]

i got to doing some digging last night on the net and reading about the ds4 and db4 pumps, and why couldnt we adapt one to or trucks, now i knoe the ds4 uses a pmd but couldnt there be away to make something to control it, it says there is many different levels of timing and fuel injection rates and rpm and timing curves that can all be adjusted within the pmd, and that its capable of 40hp per cylinder which is 320 hp worth of fuel and it make power at 5000 rpm

 

[swampdigger]

The Chev DS4s spin the wrong way. I agree though, I'd love to see one adapted. The control strategy is well documented, and would challenging but by all means possible to run off a homebrew micro-controller. There's an AVR Xmega sitting beside me waiting for a project!

I would like to try fueling primarily on propane or CNG, and just using diesel for pilot ignition.

 

[dyoung14]

The Chev DS4s spin the wrong way. I agree though, I'd love to see one adapted. The control strategy is well documented, and would challenging but by all means possible to run off a homebrew micro-controller. There's an AVR Xmega sitting beside me waiting for a project!

I would like to try fueling primarily on propane or CNG, and just using diesel for pilot ignition.

so the chevy motors spin in an opposite direction than ours? what would have to be done to the pump to make it work?

 

[subliminal]

build a gear to gear adaptor that reverses the rototion on the ip. it could be done with some machine work. i dunno i was just thinking?

 

[Agnem]

...but by all means possible to run off a homebrew micro-controller.....

BLASPHEMY! You propose controlling your truck with a computer! You are NOT of the body!







BURN HIM! BURN HIM! Get the torches!



JK

 

[RustyBolts]

The Chev DS4s spin the wrong way. I agree though, I'd love to see one adapted. The control strategy is well documented, and would challenging but by all means possible to run off a homebrew micro-controller. There's an AVR Xmega sitting beside me waiting for a project!

I would like to try fueling primarily on propane or CNG, and just using diesel for pilot ignition.

If the DS-4's are like the DB-2's, then the pump can be taken apart, and the cam ring flipped over, but IDK, I've never seen a DS-4 apart. In my Diesel Performance and Diagnosis class, we're going over DB-2's right now.

 

[RustyBolts]

so the chevy motors spin in an opposite direction than ours? what would have to be done to the pump to make it work?

The GM engines don't spin backwards, just the IP's do.

 

[SparkandFire]

The Chev DS4s spin the wrong way. I agree though, I'd love to see one adapted. The control strategy is well documented, and would challenging but by all means possible to run off a homebrew micro-controller. There's an AVR Xmega sitting beside me waiting for a project!

I have an easy way to get computer control in your truck... It's a two step process...

1st step - Sell your IDI
2nd step - Buy a PSD

 

[swampdigger]

HAHAHA!!

Put your pitchforks down!!!

I've thought about PSDs and the like. But when the computer and associated electronics take a dive, they can't just pull a DB2 out of the glovebox, and be on their way.

This topic sorta came up a few years ago, when I was thinking out loud about DS4s. Mel was the one who suggested I toss a servo on the metering valve of a DB2

RustyBolts, what about the vane pump? Can it handle the reverse rotation, or be reversed?

Do the 6.2/6.5s fire two cylinders at a time, or one like our 6.9s?

 

[Agnem]

Electronic controls versus computers... Not the same thing.

 

[towcat]

i know you guys like visuals....
check out this linky on the operation of our pumps.
http://www.oliverdiesel.com/tech/howdb2pumpworks.htm

 

[swampdigger]

It'd be easier than fitting a DS4 onto these motors. Gut the governor out, so the fuelling is only controlled by the metering valve, which is controlled by a servo. Just need a way to have full control of the advance... maybe hydraulically off the transfer pump pressure with a solenoid valve.

A requirement would to have basic fuel control if the electronics went haywire. Still retain a cabled throttle, which is normally connected to a potentiometer for the electronic fuelling, but able to be attached directly to the metering valve in case of gremlins.

 

[RustyBolts]

HAHAHA!!

RustyBolts, what about the vane pump? Can it handle the reverse rotation, or be reversed?

Do the 6.2/6.5s fire two cylinders at a time, or one like our 6.9s?

I know it can on the DB-2, But idk on the DS. Like I said, I havent seen one apart yet.
The 6.2/6.5 both only fires 1 cylinder at a time. They may be a Detroit made engine, but they're a Typical 4 stroke.