ENGINE — 2TR-FE ENGINE EG-27

" Wiring Diagram A

Alternator
B

M
IG
Ignition Switch
S
Regulator

L Discharge EG
Warning Light

E
271EG37

JSTARTING SYSTEM
1. General
D A compact and lightweight PS (Planetary reduction-Segment conductor motor) type starter is used.
D Conventional planetary reduction type starter is used.
D A planetary reduction type starter with an interpolar magnet is used. The structure of the interpolar magnet
is the same as that of the interpolar magnet used in the PS type starter described above.

" Specifications A

PS 1.6*3 DW 1.7*4 RA 1.4*5

Starter Type Planetary Reduction Type Planetary
PS Type
with Interpolar Magnet Reduction Type
Supplier DENSO BOSCH DENSO
Rating Output 1.6 kW 1.7 kW 1.4 kW
Rating Voltage 12 V z z
Length*1 129 mm (5.1 in.) 153 mm (6.0 in.) 132 mm (5.2 in.)
Weight 2800 g (6.2 lb) 3300 g (7.3 lb) 3650 g (8.0 lb)
Rotating of Direction*2 Clockwise z z

*1: Length from mounted area to rear end of the starter

*2: Viewed from pinion side
*3: Models for Thailand, Indonesia, Philippines, Malaysia and Vietnam
*4: Models for South Africa, Central and South America and Brazil
*5: Models for G.C.C. Countries

NM
00M4E
EG-28 ENGINE — 2TR-FE ENGINE

2. PS (Planetary reduction-Segment conductor motor) Starter

General

D Because the PS type starter contains an armature that uses square-shaped conductors, and its surface
functions as a commutator, it has both improved its output torque and reduced its overall length.
D In place of the field coil used in the conventional type starter, the PS type starter uses two types of
permanent magnets: main magnets and interpolar magnets. The main magnets and interpolar magnets
have been efficiently arranged to increase the magnetic flux and to shorten the length of the yoke.

Surface Commutator Permanent Magnet

Armature

Brush

PS Type

Length

Conventional
Type

271EG38

NM
00M4E
 ENGINE — 2TR-FE ENGINE EG-29

Construction

D Instead of constructing the armature coil with conventional type round-shaped conductor wires, the PS
type starter uses square conductors. With this type of construction, the same conditions that are achieve
by winding numerous round-shaped conductor wires can be achieved without increasing the mass. As
a result, the output torque has been increased, and the armature coil has been made more compact.
D Because the surface of the square-shaped conductors that are used in the armature coil functions as a
commutator, the overall length of the PS type starter has been shortened.

Conventional Type
Brush
Armature Square-shaped Round-shaped
Conductor Conductor EG
B Commutator

A
Brush

A B - B Cross Section
A - A Cross Section
Armature (PS Type) (Conventional Type)
Surface Commutator
PS Type

206EG20

D Instead of the field coils used in the conventional type starter, the PS type starter uses two types of
permanent magnets: the main magnets and the interpolar magnets. The main and interpolar magnets are
arranged alternately inside the yoke, allowing the magnetic flux generated between the main and
interpolar magnets to be added to the magnetic flux generated by the main magnets. In addition to
increasing the amount of magnetic flux, this construction shortens the overall length of the yoke.

Main Magnets Magnetic Flux Generated by

Interpolar Magnets Relationship Between Main Magnets

Yoke Main Magnets Magnetic Flux Generated

by Interpolar Magnets

S N
N S
N
S

Armature
Cross Section of Yoke

222EG15

NM
00M4E