Mitsubishi 4G1 series

4G1 ENGINE (E–W) – General Information
11A-0-7
PWEE9520
E
Nov. 1995Mitsubishi Motors Corporation
Descriptions 4G15–
CARBURETTOR
4G15–MPI
12-VALVE
4G15–MPI
16-VALVE
4G15–GDI
Type In-line OHV, SOHC In-line OHV, SOHC In-line OHV, DOHC In-line OHV, DOHC
Number of cylinders 4 4 4 4
Combustion chamber Semi spherical type Semi spherical type Pentroof type Pentroof + Curved
piston head
Total displacement dm
3
1,468 1,468 1,468 1,468
Cylinder bore mm 75.5 75.5 75.5 75.5
Piston stroke mm 82.0 82.0 82.0 82.0
Compression ratio 9.0 9.0 9.5 11.0
Number
o
f
valves
Intake 8 8 8 8
o
f
va
l
ves
Exhaust 4 4 8 8
Valve
timing
Intake opens BTDC 14_ BTDC 14_ ,
BTDC 13_*
1
BTDC 16_ BTDC 12_
Intake closes ABDC 48_ ABDC 48_ ,
ABDC 47_*
1
ABDC 40_ ABDC 44_
Exhaust
opens
BBDC 55_ BBDC 55_ ,
BBDC 56_*
1
BBDC 45_ BBDC 48_
Exhaust
closes
ATDC 13_ ATDC 13_ ,
ATDC 8_*
1
ATDC 15_ ATDC 12_
Lubrication system Pressure feed,
full-flow filtration
Pressure feed,
full-flow filtration
Pressure feed,
full-flow filtration
Pressure feed,
full-flow filtration
Oil pump type Trochoid type Trochoid type Trochoid type Trochoid type
Cooling system Water-cooled,
forced circulation
Water-cooled,
forced circulation
Water-cooled,
forced circulation
Water-cooled,
forced circulation
Water pump type Centrifugal impeller
type
Centrifugal impeller
type
Centrifugal impeller
type
Centrifugal impeller
type
*
1
: Special low-emission engines on vehicles for Australia
PWEE9520-E
E
Feb. 2001Mitsubishi Motors Corporation Revised