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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: What is a 2JZ-FSE??
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Sun, 23 March 2003 07:35
 
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Lifted from this website:
http://www.sae.org/automag/globalview_01-00/02.htm
"A significant addition to the JZ family of engines is the 2JZ-FSE, a DOHC 24-valve 3.0-L unit, which is Toyota's second D4 direct-injection gasoline engine. As its designation indicates, it shares its lower half with the 2997-cm3 2JZ-GE unit with 86.0-mm (3.39-in) bore and stroke. The D4 upper half is unique to this engine, and represents the state of Toyota's direct-injection art. The 2JZ-FSE's power and torque outputs are the same as the port-injection 2JZ-GE's at 162 kW (220 hp) and 294 N•m (217 lb•ft), but at lower engine speeds of 5600 rpm and 3600 rpm, respectively. The engine's compression ratio is a higher 11.3:1 vs. the port injection unit's 10.5:1, with both engines using regular-grade unleaded gasoline."
"The new 2JZ-FSE's stratified charge combustion envelope has been extended to a higher vehicle speed range of about 120 km/h, adequately covering Japan's real-life highway cruising. Fuel economy, quoted at 11.4 km/L (27 mpg) on Japan's urban 10/15 mode for the Royal, is about 21% superior to the previous port-injection model. At high-load conditions such as rapid acceleration and high-speed running, the engine operates in the stoichiometric zone with fuel injected during the intake stroke. One of the two straight intake ports is fitted with a flow-control valve, its opening and closing improving cylinder filling and combustion efficiency. During low-speed, high-load operation, this valve is fully closed, with the air admitted through the single open port, accelerating flow speed and improving cylinder filling. The flow-control valve is fully opened during high-speed, high-load operation, introducing ample air. A transient "weak stratified charge" zone, with an air/fuel ratio of 18:1 through 25:1, ensures a smooth transition between ultra-lean stratified-charge operation and homogeneous-charge combustion. Fuel is "split-injected" partially during the intake stroke and the remainder during the compression stroke."
"A single stage cogged belt drives the exhaust camshaft. The exhaust camshaft carries a vane-type VVT-i continuously variable intake valve timing device and drives the intake camshaft via a split and spring-loaded "scissors" geartrain. The VVT-i has a variable timing range of 40°. The camshaft acts on valves via shimless bucket tappets. The intake and exhaust valves are inclined at a narrow included angle of 22.6°, vs. the port-injected 2JZ-GE's 45°. Valve diameters are 33.5 mm (1.32 in) for intake and 28.0 mm (1.10 in) for exhaust vs. the 2JZ-GE's 33.5 mm (1.32 in) and 29 mm (1.14 in), respectively. Lifts are 6.0 mm (0.24 in) for either engine type. The induction system employs a variable-length ACIS (acoustic control induction system) to exploit the incoming air's pulsation to obtain inertia charge effect."
Hope this helps a bit Glen.
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