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EG-2

ENGINE - 1NZ-FE ENGINE

1NZ-FE ENGINE
JDESCRIPTION
The 1NZ-FE engine is a in-line, 4-cylinder, 1.5 liter, 16-valve DOHC engine. The VVT-i (Variable Valve Timing-intelligent) system, DIS (Direct Ignition System) and ETCS-i (Electronic Throttle Control System-intelligent) are used on this engine in order to realize high performance, quietness, fuel economy and clean emission.00REG01Y

00REG02Y

ENGINE - 1NZ-FE ENGINE
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Engine Specifications A 4-Cylinder, In-line 16-Valve DOHC, Chain Drive (with VVT-i) Pentroof Type Cross-Flow SFI DIS 1497 (91.3) 75.0 x 84.7 (2.95 x 3.33) 10.5 : 1 79 kW @ 6000 rpm (106 HP @ 6000 rpm) 139 N.m @ 4200 rpm (103 ft lbf @ 4200 rpm) -7 _ - 33_ BTDC 52_ - 12_ ABDC 42_ BBDC 2_ ATDC 1-3-4-2 90 or higher 87 or higher ILSAC TIRE2,ULEV-II ORVR 83.2 (183.4) 77.8 (171.5)

No. of Cyls. & Arrangement Valve Mechanism Combustion Chamber Manifolds Fuel System Ignition System Displacement Bore x Stroke Compression Ratio Max. Output*1 Max. Torque*1 Valve Timing g Intake Exhaust

cm3 (cu. in.) mm (in.) (SAE-NET) (SAE-NET) Open Close Open Close

Firing Order Research Octane Number Octane Rating Oil Grade Tailpipe Emission RegulationEvaporative Emission Regulation Engine Service Mass 2 Mass* kg (lb) (Reference)

M/T A/T

*1: Maximum output and torque rating is determined by revised SAE J1349 standard. *2: Weight shows the figure with the oil fully filled.
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Valve Timing A : IN Opening Angle : EX Opening Angle VVT-i Operation Angle 33_ TDC 2_ 7_

52_ 42_ VVT-i Operation Angle 12_ BDC

247EG02

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ENGINE -1NZ-FE ENGINE

JFEATURES OF 1NZ-FE ENGINE
The 1NZ-FE engine has been able to achieve the following performance through the adoption of the items listed below. (1) High performance and fuel economy (2) Low noise and vibration (3) Lightweight and compact design (4) Good serviceability (5) Clean emission Section Item A cylinder block made of aluminum is used. Engine Proper An offset crankshaft isused. The taper squish shape is used for the combustion chamber. A timing chain and chain tensioner are used. The VVT-i system is used. Intake manifold made of plastic is used. The linkless-type throttle body is used. Intake and Exhaust System A stainless steel exhaust manifold is used. Two TWCs (Three Way Catalytic Converter) are used. A rearward exhaust layout is used to realize the earlyactivation of the catalyst. 12-hole type injector is used. Fuel System The fuel returnless system is used. Quick connectors are used to connect the fuel hose with the fuel pipes. The long-reach type spark plugs are used. Ignition System The DIS (Direct Ignition system) makes ignition timing adjustment unnecessary. The ETCS-i (Electronic System-intelligent) is used. Engine Control System y Throttle Controlf f f f f f f f f f f f f f f f f f f f f f f f f f f f f f (1) (2) (3) f f f (4) (5)

Valve Mechanism

The non-contact sensor is used in the throttle position sensor and accelerator pedal position sensor. The cranking hold function is used. Evaporative emission control system is used. The use of an air fuel ratio sensor allows for precise control.

ENGINE - 1NZ-FE ENGINE

EG-5JENGINE PROPER 1. Cylinder Head
D The injectors are installed in the cylinder head to reduce the distance from injector to intake valve, thus it prevents the fuel from adhering to the intake port walls, and reduce exhaust emissions. D The routing of the water jacket in the cylinder head is optimized to achieve high cooling performance. D Through the use of the taper squish combustion chamber, theengine’s knocking resistance and fuel efficiency have been improved.

Injector IN EX Water Jacket

Taper Squish

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2. Cylinder Block
D Lightweight aluminum alloy is used for the cylinder block. D Through the use of the offset crankshaft, the bore center is shifted 12 mm (0.472 in.) towards the intake, in relation to the crankshaft center. Thus, the side force to cylinder wall is...
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