Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Robb]

Ion sensing is less than a year from being on the street oem, and will be in the aftermarket a few months later. Knock sensor= obsolete.

Saab's had it for years.

Everybodys had it, they don't count lol.

[Joseph Davis]

Elitist.

[kgx]

GDI + 1 year

dont quote me on that

GDI seems as if it's gonna be a big jump for everyone.  Unlike port injection you can wait 'till the piston is after tdc, to squirt the fuel, and you don't have to squirt it all at once(I think it's being called a stratified burn)... 

So will all this knock detection jazz even be necessary?  If there is no fuel in the hole before tdc, there is nothing to auto-ignite...

the current downfall of GDI though is the uber-short window you have to inject the full load of fuel, unlike the 2 crank revolutions you have to spray the ports. check some of the forums of cars that use GDI and you'll find people trying to convert them back to port injection for bigger injectors so they can run more boost.

[nock]

i would guess that once GDI becomes used widely that somthing like this will become available for gas engines just because the technology will be cheap:
http://www.beru.com/english/produkte/psg.php
it seems like they want match certian profiles by using pressure sensors. lower co2 NOx i guess. we might see them in the states because, according to all the BS, the engines will need less after treatment to meet the new standards.

[92CXyD]

Honda is about the only manufacturer without GDI... I sent JD an article a few weeks ago.  Honda doesnt plan on dong GDI any time soon. 

Diesel cycle gas engines ftw though...

Hondas R18 is a direct fuel inj. engine.

[jabberwock]

http://www.thetruthaboutcars.com/honda-on-direct-injection-dont-wait-for-it-we-have-other-priorities/

 

[HiProfile]

the current downfall of GDI though is the uber-short window you have to inject the full load of fuel, unlike the 2 crank revolutions you have to spray the ports. check some of the forums of cars that use GDI and you'll find people trying to convert them back to port injection for bigger injectors so they can run more boost.

Well just like the ID injectors, you help flow by adding lots of pressure. Diesels accomplish this by using 10x the fuel pressures as gasoline cars. OEM's just don't need a crapload of fuel since they're not running >100hp/L much any more. So they go just big enough so they don't need heavy mechanical pumps, reinforced fuel rails, or heavy-duty injectors.

[nock]

http://www.not2fast.com/ignition/spra039.pdf

more light reading from my favorite site

[nock]

score!

http://www.rhinopower.org/knock/docs/bosch_ks_ds.pdf

[fe3tcourier]

Saab's had it for years.

QFT - you took the words right out of my mouth! :-)

http://www.not2fast.com/ignition/spra039.pdf

more light reading from my favorite site

Trust you to be in love with Eric's site, I wonder if your tongue could be further up his arse than it already is? :-)

Fred.

PS, Eric = MegaTune author (which btw *is* actually FOSS)

[92CXyD]

score!

http://www.rhinopower.org/knock/docs/bosch_ks_ds.pdf

would this work?

http://cgi.ebay.com/ebaymotors/NEW-Infiniti-G20-I30-J30-Q45-QX4-Knock-Sensor-OEM-SPEC-/140401011663?pt=Motors_Car_Truck_Parts_Accessories&hash=item20b08d6bcf

I like the price.  ;D