Wikipedia hasn't got much yet on the TR series:
http://en.wikipedia.org/wiki/Toyota_TR_engine
However, the following may help, although the Auzzie model may be
different from other regions:
http://www.pressroom.com.au/press_kit_detail.asp?clientID=2&navSection...11&cate
Toyota HiAce's all-new 2.7-litre Twin Cam Multi-valve petrol engine is
one of the first commercial van engines in Australia with intelligent
infinitely variable inlet timing.
The new 2694cm3 VVT-i equipped 2TR-FE engine supersedes a 2.4-litre
SOHC eight-valve 3RZ-E engine.
The 2.7-litre engine has twin counter-rotating balance shafts and a
torsional damper rubber in the crankshaft pulley to reduce NVH.
The Toyota 2TR-FE engine delivers 111kW of power at 4800rpm and 241Nm
of torque at 3800rpm.
t can be matched to a five-speed manual or electronically controlled
four-speed automatic transmission and can operate on regular ULP or be
converted to LPG operation with Toyota's vapour-injection LPG kit.
Sophisticated features of the 2TR-FE engine include: VVT-i, a linkless
electronic throttle, long-nozzle fuel injectors to reduce wall wetting
and hence emissions and an air-fuel ratio sensor for precise fuel/air
metering.
Reliability and serviceability have been maximised by chain camshaft
drive, maintenance-free valve clearance adjusters and electronic
engine control.
In addition, the new HiAce engine has direct ignition and long-reach
spark plugs for increased serviceability, reliability and performance,
a plastic intake manifold to reduce weight and a stainless-steel
exhaust manifold with three-way catalytic converter for low emissions.
The intelligent Toyota variable valve-timing system (VVT-i) in the 2TR-
FE engine offers infinitely variable inlet valve timing within a range
of 45 degrees (relative to crankshaft angle).
VVT-i optimises performance across the engine revolution range and
minimises emissions.
The Toyota 2TR-FE engine has "square" bore and stroke dimensions of
95mm by 95mm, for a balance of power and torque.
It has a deep-skirt cylinder block to minimise noise and vibration.
The fully balanced crankshaft has roll-finished pin and journal
fillets, for increased strength.
Quality, durability and reliability features of the 2TR-FE engine
include oil jets at the bottom of the cylinder bores, to cool the
under side of the pistons.
The "slanted squish" combustion chamber shape is based on a narrow
included valve angle of 22.85 degrees - to boost torque.
The compact combustion chamber shape offers a low surface to volume
ratio, thereby reducing cooling losses and increasing fuel efficiency.
Toyota engineers have adopted roller rockers (with maintenance-free
valve clearance adjusters) to create the narrow 22.85 valve angle -
while providing sufficient spacing between the camshafts for the
camshaft drive sprockets.
The 2TR-FE engine has high-strength connecting rods and plastic-region
tightening big-end bolts to maximise clamping force.
The upper bearing shells have an oil groove and the lining surface of
the bearings has micro grooves - for optimal oil clearance and hence
improved cold-cranking performance and reduced engine vibration.
The aluminium alloy pistons have resin-coated skirts to reduce
friction and three special features to reduce piston-ring wear -
including anodic oxide on the top ring groove to improve wear
resistance, physical vapour deposition (PVD) coating on the surface of
the number one compression ring and chrome plating on the number two
piston ring.
The 2TR-FE engine has the advanced electrical features of a segment
conductor type alternator and a planetary reduction segment conductor
starter motor - for increased performance and reduced weight.
On Feb 15, 4:54 am, Bob Adkins <bob.adk....DeleteThis@gmail.com> wrote:
> Yes, my old truck had the 22R-E. My new one has the 2TR-FE, and I
> can't find a darn thing about it.
>
> Here's all I can find, actually.
>
> "The 2TR-FE is a 2.7L I4 gasoline engine. It features DOHC, 16 valves
> and VVT-i . Its power is 159 hp (119 kW) @ 5200 rpm, and 180 lbf·ft
> (244 N·m) of torque @ 3800 rpm."
>
> I would like to know a bit about the design and metallurgy. For
> example, is the block aluminum, or cast iron? I assume is uses a
> timing chain rather than a belt. Is the crankshaft forged, or cast?
> That type info, you know?
>
> Any web sites with that type of info would be appreciated.
>
> Thanks,,,
> -
>
> Bob >> Stay informed about: 2008 Tacoma 4cyl 
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