EG-2 ENGINE - 1NZ-FE ENGINE
1NZ-FE ENGINE
J DESCRIPTION
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.
00RE G01Y
00RE G02Y
ENGINE - 1NZ-FE ENGINE EG-3
" Engine Specifications A
No. of Cyls. & Arrangement 4-Cylinder, In-line
Valve Mechanism 16-Valve DOHC, Chain Drive (with VVT-i)
Combustion Chamber Pentroof Type
Manifolds Cross-Flow
Fuel System SFI
Ignition System DIS
Displacement cm3 (cu. in.) 1497 (91.3)
Bore x Stroke mm (in.) 75.0 x 84.7 (2.95 x 3.33)
Compression Ratio 10.5 : 1
Max. Output*1 (SAE-NET) 79 kW @ 6000 rpm (106 HP @ 6000 rpm)
Max. Torque*1 (SAE-NET) 139 N.m @ 4200 rpm (103 ft lbf @ 4200 rpm)
-7 _ - 33_ BTDC
Intake Open
Valve Intake Close 52_ - 12_ ABDC
Timing
g Exhaust
Exhaust Close
Open 42_ BBDC
2_ ATD C
Firing Order 1-3-4-2
Research Octane Number 90 or higher
Octane Rating 87 or higher
Oil Grade ILSAC
Tailpipe Emission Regulation TIRE2, ULEV-II
Evaporative Emission Regulation ORVR
EngineService
Engine ServiceMass*2
Mass kg (lb) M/T 83.2 (183.4)
(Reference) kg (lb) A/T 77.8 (171.5)
*1: Maximum output and torque rating is determined by revised SAE J1349 standard.
*2: Weight shows the figure with the oil fully filled.
" Valve Timing A
: IN Opening Angle
: EX Opening Angle
VVT-i Operation Angle TDC 2_7_
33_
52_
42_
VVT-i Operation Angle 12_
BDC 247EG 02
EG-4 ENGINE - 1NZ-FE ENGINE
J FEATURES 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 (1) (2) (3) (4) (5)
A cylinder block made of aluminum is used. f
fff
Engine Proper The
An offset
taper crankshaft
squish shape
is used.
is used for the combustion
ff
chamber.
Valve A timing chain and chain tensioner are used. f f f
Mechanism The VVT-i system is used. ff
Intake manifold made of plastic is used. f
The linkless-type throttle body is used. ff
Intake and A stainless steel exhaust manifold is used. f
Exhaust System Two TWCs (Three Way Catalytic Converter) are used. f
A rearward exhaust layout is used to realize the early
f
activation of the catalyst.
12-hole type injector is used. ff
fff
Fuel System Quick
The fuel
connectors
returnlessare
system
used is
to used.
connect the fuel hose with
f
the fuel pipes.
The long-reach type spark plugs are used. f
Ignition System The DIS (Direct Ignition system) makes ignition timing
fff
adjustment unnecessary.
The ETCS-i (Electronic Throttle Control
ff
System-intelligent) is used.
The non-contact sensor is used in the throttle position
Engine Control sensor and accelerator pedal position sensor. f
Engine
System
y Control
The cranking hold function is used. f
Evaporative emission control system is used. f
The use of an air fuel ratio sensor allows for precise
f
control.
EG-6 ENGINE
ENGINE
- 1NZ-FE
- 1NZ-FE
ENGINE
ENGINE EG-5
D TheJ ENGINE PROPER
liners are the spiny-type, which have been manufactured so that their casting exterior forms a large
irregular surface in order to enhance the adhesion between the liners and the aluminum cylinder block.
The1. Cylinder
enhanced Head helps improve heat dissipation, resulting in a lower overall temperature and heat
adhesion
deformation of the cylinder
D The injectors bores.in the cylinder head to reduce the distance from injector to intake valve, thus
are installed
it prevents the fuel from adhering to the intake port walls,
Irregularly and outer
shaped reduce exhaust emissions.
D The routing of the water jacket in the cylinder head is optimized toCylinder
casting surface of liner Block
achieve high cooling performance.
A
D Through the use of the taper squish combustion chamber, the engine’s knocking resistance and fuel
A
efficiency have been improved.
Injector
IN
Liner
EX
A - A Cross Section
Water Jacket
00REG 19Y
3. Piston
D The piston is made of aluminum alloy
Taper Squish
D The piston head portion is used a taper squish shape to accomplish fuel combustion efficiency.
247EG 03
D Semi floating type piston pins are used.
2. Cylinder Block
D By increasing the machining precision of the cylinder bore diameter, only one size of piston is available.
D Lightweight aluminum alloy is used for the cylinder block.
D Through Taper Squish
the use Shape
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 reduced when the maximum
pressure is applied, which contributes to fuel economy.
Piston Ring
Bore Center
Maximum
Pressure
Crankshaft
Center
247EG 06
Crankshaft Center Offset Crankshaft Center Crankshaft
247E G04 193EG 05
