4.5L Toyota Turbo Diesel

007Tacoma · Dec 7, 2007

http://dieselforecast.com/ArticleDetails.php?articleID=411

You guys know me, "Toyota" and "diesel" were mentioned in the same article, and I got all excited. Unfortunately, this thing isn't planned to come to the states any time soon, but I would love to drop this engine into my Tacoma or a new Tundra!!! - 007Tacoma

Toyota creates all-new diesel V-8 for 2008 Land Cruiser
by Editorial Staff

At the Sydney Motor Show in October Toyota unveiled a redesigned version of its venerable Land Cruiser full-size SUV.

Like the previous generation model, the new one shares a platform with the latest Lexus luxury SUV, the LX570. Prior to the mid-nineties, Toyota did offer diesel engines in the US market Land Cruiser but in recent years they have only offered gasoline V-8s.

At the US launch event for the new Land Cruiser Brian Smith, Toyota's truck and SUV marketing manager said that diesels are the dominant choice for buyers outside of North America. Smith indicated that at some point this new diesel could turn up at US dealers as well. In the US market the Land Cruiser has never been one of the top sellers among large SUVs with fewer than 3,400 sales in 2006. Nonetheless Toyota is projected that to more than double to 8,000 anually with the new model.

For overseas markets, Toyota is offering an all-new 4.5L diesel V-8 in the new Land Cruiser. The D-4D engine as it has been dubbed features a common rail injection system, the first time that Toyota has used this setup on a V-8 engine. In combination with a pair of variable nozzle turbochargers the new engine generates 286hp at 3,600 rpm and 479lb-ft from 1600 to 2800rpm.

Each bank of the V-8 gets its own independent common rail injection setup which has 33 percent higher pressure than the older 4.2L inline six cylinder diesel from the last generation model. The 1,800 bar injection pressure helps facilitate finer more precise metering of the fuel. The use of this new injection system enables a pair of 1 mm^3 pilot injection strokes before the main pulse which helps reduce the noise from the combustion process by 3.5 dB compared to the old six.

The twin turbochargers have electrically actuated variable intake nozzles. The DC motors can make faster more precise adjustments to the turbo inlets than the more typical vacuum actuator. The combination of the new turbochargers and fuel system means the engine can respond better to inputs from the driver. With the engine following the driver's request more precisely, the driver is less likely to overshoot what's really needed contributing to improved efficiency.

The turbochargers are also equipped with the equivalent of a dry sump lubrication system. A scavenging system pulls out excess oil in the turbocharger housings, reducing the consumption and emissions. Emissions are further reduced through the use of an exhaust gas recirculation system to lower combustion temperatures and NOx production. The EGR passages have been integrated into the cylinder head castings. This reduces the part count for assembly, while the potential for leaks as well eliminating another source of noise from the connections that are eliminated. The manufacturing costs are also reduced.

In spite of the larger displacement and increased power, the new engine is significantly lighter than the old diesel. The combination of the V-8 block configuration and casting it from compacted graphite cast iron provides for a block that is 75 percent stiffer and 30 percent lighter than the inline six cylinder block. The stronger material and the stiffer configuration reduces the vibration and the noise produced by the new engine.

Compared to the previous diesel engine, the D-4D produces 40 percent more power and 50 percent more torque. The new engine pushes the nearly 5,800lb Land Cruiser to 62mph from a standing start in 8.2 seconds, one second faster than the 4.7L gasoline V-8. The D-4D is compliant with current EURO IV emissions standards but not with US Tier 2 Bin 5 standards. On the European Union combined mileage cycle the 4.5L diesel is rated at 23 mpg compared to 16.3 for the 4.7L gasoline engine.

For the time being Toyota is only offering this new diesel V-8 outside of North America. Toyota spokesman Curt McAllister confirmed that although Toyota is looking at alternative fuels the company has no immediate plans to offer the new diesel to American consumers. At the Los Angeles Auto Show introduction of the 2008 Sequoia, Toyota did announce plans to offer a flex-fuel version of the 4.7L V-8 in that vehicle. According to McAllister there are currently no plans to offer the flex-fuel engine in the Land Cruiser either. If the new fuel economy regulations do get enacted by the US Congress, these plans may change.
Click to expand...

For more Diesel market and production news and articles, please check out http://dieselforecast.com/ - 007Tacoma

007Tacoma · Dec 7, 2007

So, I have just been told that this thing will bolt right up where a 4.7L should go. Hmmm...

nd · Dec 7, 2007

thats sweet but i'd still be happy with their 3.0. although almost 450 ft/lbs of torque would be bitchin!

007Tacoma · Dec 7, 2007

Yeah, if they would put this in the new Tundra DC 4WD, then I would be pre-ordering and selling my Tacoma.

concrete jedi · Dec 7, 2007

I have a funny feeling in my pee-pee area.

tony4380 · Dec 7, 2007

damn... not bad... for some reason i knew toyota wouldnt be far behind in the diesel world.... and yes, they need to throw that in a Tundra. Tundra sales would shoot through the roof. I like my F250... love my Tacoma... but would much rather have a twin turbo diesel Tundra DC on 20s.

only thing i notice that im not too sure of... is the top mounted intercooler

The_Hodge · Dec 7, 2007

i know...y put it in a vehicle that only sells 4800 units in the us annually? thats just dumb...they need to listen to the petitions and put one in the taco or atleast the tundra

rrtaco · Jun 30, 2009

diesel tacoma!!!!!!!!!!!!!!!!!!!!!!!!!! that would be sickkkk who who make the engine... i hope cummins

The_Hodge · Jun 30, 2009

wow....this thread is so old i had to re-read my own post to see what i said....whew

007Tacoma · Oct 5, 2009

rrtaco said: ↑

diesel tacoma!!!!!!!!!!!!!!!!!!!!!!!!!! that would be sickkkk who who make the engine... i hope cummins
Click to expand...

Nope. It is made by Toyota with assistance from their Hino division.

007Tacoma · Oct 5, 2009

jhodge83 said: ↑

wow....this thread is so old i had to re-read my own post to see what i said....whew
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LMAO! Holy Thread Resurrection Batman!!!

007Tacoma · Oct 5, 2009

silverback07 said: ↑

No doubt!! Its alive!! I'm still crossing my fingers though. Mark you should check with your buddy at Diesel Toyz and see if they can make this swap happen.
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He can make it happen. As a matter of fact, Todd was telling me that they can get these engines straight from Australia for a damn skippy price. I wanted to do one, but I don't need that much power at the price of such a drop in fuel economy. I would be much more kosher with the 3.0L D4-D out of the Hilux.

wiscdave · Oct 5, 2009

Might have to go to Canada next time I buy a truck to get the helux diesel

007Tacoma · Oct 5, 2009

wiscdave said: ↑

Might have to go to Canada next time I buy a truck to get the helux diesel
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Hope you want one that is 10 years old. Toyota hasn't sold the diesel Hilux in Canada since 1999 (Hilux Surf = 4Runner). Now they have the Tacoma with out a diesel option just like the US.

wiscdave · Oct 5, 2009

According to this you can import one a little easier...http://www.toyotanation.com/forum/showthread.php?t=204865

98tacoma27 · Oct 5, 2009

The 1,800 bar injection pressure helps facilitate finer more precise metering of the fuel.
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Typo? Thats 27000 psi.

Unless this is a European written article where the "," is translated as "."

testedone · Oct 5, 2009

The Hilux was what sold me on buying a Taco when I got home from Afghanistan, they (Hilux) are all over the place there...brand new!!

chris4x4 · Oct 5, 2009

98tacoma27 said: ↑

Typo? Thats 27000 psi.

Unless this is a European written article where the "," is translated as "."
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Not unheard of. Some of the newer deisels are pushing 55K psi....or higher.

98tacoma27 · Oct 5, 2009

chris4x4 said: ↑

Not unheard of. Some of the newer deisels are pushing 55K psi....or higher.
Click to expand...

Why would they need the psi to be so high?

007Tacoma · Oct 5, 2009

98tacoma27 said: ↑

Why would they need the psi to be so high?
Click to expand...

To provide better atomization of the diesel as it leaves the injector and provide enough pressure to provide multiple injections (think pilot injection) during the stroke of each cylinder. All 8 cylinders share the same "common rail" - hence the name.

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