Hi there. I was writing on a report about automotive technology, and its based upon displacement on demand technology.
I got reading and looking at a few different manufacturers and noticed that GMC 5.3 engine and Chrysler/Dodges 5.7 engine are almost identical in DoD and how its setup. I also looked at Honda and how theirs is setup, but couldn't figure it out.

I guess what i'm asking/saying is if GMC and Chrysler hooked up and co-developed this technology?

And another question, does anybody know how the Honda system of this works? I have already tried searching but couldn't get a clear answer. All the Honda sight gave me was that it takes inputs and closes the valves, but it really didn't say how.

Some guy from GMC came to our class and showed how the GMC system worked, and was wondering if the Honda system was the same.

Thanks for your help

 

displacement on demand cuts off half the cylinders when at light load, by the use of hydraulic lifters that are oil controlled by solenoid valves.It turns the lifter ''off'' so the cam dont actuate the valve.
v6 turns into an inline 6 and v8 into a v4

Honda does not have anythting like this.Nor manufactures any pushrod engines. Did you mean vtec?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by triangles &raquo;</TD></TR><TR><TD CLASS="quote">Hi there. I was writing on a report about automotive technology, and its based upon displacement on demand technology.
I got reading and looking at a few different manufacturers and noticed that GMC 5.3 engine and Chrysler/Dodges 5.7 engine are almost identical in DoD and how its setup. I also looked at Honda and how theirs is setup, but couldn't figure it out.

I guess what i'm asking/saying is if GMC and Chrysler hooked up and co-developed this technology?

And another question, does anybody know how the Honda system of this works? I have already tried searching but couldn't get a clear answer. All the Honda sight gave me was that it takes inputs and closes the valves, but it really didn't say how.

Some guy from GMC came to our class and showed how the GMC system worked, and was wondering if the Honda system was the same.

Thanks for your help</TD></TR></TABLE>

The GM setup and the Chrysler setup are going to be virtually identical since both are pushrod V8s. Honda's setup on the 3.5 V6 is going to be quite different since it is a SOHC motor. I have not seen how it works. But I would imagine that it works using a setup similar to VTEC.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mmuller &raquo;</TD></TR><TR><TD CLASS="quote">displacement on demand cuts off half the cylinders when at light load, by the use of hydraulic lifters that are oil controlled by solenoid valves.It turns the lifter ''off'' so the cam dont actuate the valve.
v6 turns into an inline3 and v8 into a v4

Honda does not have anythting like this.Nor manufactures any pushrod engines. Did you mean vtec?</TD></TR></TABLE>

fixed for ya

 

I didn't mean vtec. I already knew that one bank of cylinders would shut down, making it a 3 cylinder.
I was wondering if it uses the same procces as the GMC DoD.
Hondas version technical name for it is VCM, or variable cylinder management. Chryslers/dodges version is named MDS, or multi displacement system engine.

I have seen a technical drawing of chryslers and gm's, version, and they are identical. since honda doesn't use pushrods, would it still deactivate the valve throught he hydraulic lifters?

the weird thing is how honda deactivates one whole side of cylinders and uses a fancy electronic engine dampener to control vibration. http://automobiles.honda.com/m...yssey
There's the link to the honda VCM graphics, and you'll see what i mean.

heres the link to the chrysler MDS engine,
http://www.chrysler.com/300/fe....html
hopefully you'll see what i mean.

thanks for the help.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by projectTeG &raquo;</TD></TR><TR><TD CLASS="quote">fixed for ya </TD></TR></TABLE>

hehe thanks

 

With the Honda VCM system the PCM controls oil pressure to synchronizing pins on the rear bank of rocker arm to disengage them during cruise conditions.

They also added a pretty fancy active control mount system to reduce vibration and an active noise reduction system to quiet down engine noise.