Manual tecnico t3

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.00REG01Y

00REG02Y

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ENGINE - 1NZ-FE ENGINE
"

Engine Specifications A

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

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

Intake

Valve
Timing
g

4-Cylinder, In-line16-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)

Exhaust

Firing Order
Research OctaneNumber
Octane Rating
Oil Grade
Tailpipe Emission Regulation
Evaporative Emission Regulation
Engine Service Mass 2
Service Mass*
kg (lb)
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.
"

Valve Timing A
: IN Opening Angle
: EX Opening Angle
VVT-i Operation AngleTDC
2_

7_

33_

52_
VVT-i Operation Angle

42_
12_
BDC

247EG02

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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)

Valve
Mechanism

An offset crankshaft is used.

f

The taper squish shape is used for the combustion
chamber.

f

A timing chain and chain tensioner are used.

f

The VVT-i system is used.

f

(5)
f

f

f
f

f
f

Intake manifold made of plastic is used.

f

The linkless-type throttle body is used.
Intake andExhaust System

(4)

f

A cylinder block made of aluminum is used.
Engine Proper
Engine Proper

(3)

f

A stainless steel exhaust manifold is used.

f

f

Two TWCs (Three Way Catalytic Converter) are used.

f

A rearward exhaust layout is used to realize the early
activation of the catalyst.

f
f

12-hole type injector is used.
Fuel System
Fuel System

f

The fuelreturnless system is used.
Quick connectors are used to connect the fuel hose with
the fuel pipes.

f

f

The DIS (Direct Ignition system) makes ignition timing
adjustment unnecessary.

f

The
ETCS-i
(Electronic
System-intelligent) is used.
Engine Control
Engine Control
System
y

f
f

The long-reach type spark plugs are used.
Ignition System

f

Control

f

Thenon-contact sensor is used in the throttle position
sensor and accelerator pedal position sensor.

f

The cranking hold function is used.

f

Throttle

f

f
f

Evaporative emission control system is used.

f

The use of an air fuel ratio sensor allows for precise
control.

f

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ENGINE - 1NZ-FE ENGINE

J ENGINE PROPER
1. Cylinder Head
D The injectors are installedin 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, the engine’s knocking resistance and fuel
efficiency have...