SQR484F engine has the following features:
 Vertical and water-cooled type
 In-line DOHC with 4 cylinders
 Four valves per cylinder
 DVVT
 Aluminum cylinder head
 Aluminum cylinder block
 Aluminum crankshaft frame

Operation

SQR484F engine adopts vertical, in-line 4-cylinder, water-cooled, 4-stroke, four valves per cylinder, DOHC,
DVVT, electronic controlled sequential multiport fuel injection and natural aspiration. The engine is made of
whole aluminum and adopts electronic controlled coil double ignition system.
Aluminum oil pan is fixed to the bottom of crankshaft frame with bolts. Aluminum cylinder head is fixed on the
cylinder block with bolts. Camshafts are installed in the cylinder head. Power output from the crankshaft drives
the camshaft to rotate by crankshaft timing pulley and timing belt to make the camshaft interact with valve
hydraulic lifter to open and close. Piston assembly is an aluminum piston with cast iron connecting rod. This
engine has reliable structure and good performance.

Specifications

SQR484F Engine Specifications

Item

Specification

Engine Type

Vertical, in-line 4-cylinder, water-cooled, 4-stroke, DOHC, electronic
controlled sequential multiport fuel injection, Variable Valve Timing (VVT)

Engine Model

SQR484F

Valve Number Per Cylinder

Cylinder Diameter (mm)

83.5

Piston Stroke (mm)

Displacement (L)

1.971

Compression Ratio

10:1

Combustion Chamber Type

Pentroof type

Fuel Supply Type

Electronic controlled sequential multiport fuel injection

Ignition Type

Electrical control

Ignition Sequence

1 - 3 - 4 - 2

Idle Speed (r/min)

750 ± 50

Rated Power (kW)

102

Rated Power Speed (r/min)

5750

Max. Torque (N·m)

182

Max. Torque Speed (r/min)

4300 - 4500

07–

Max. Permissible Speed (r/min)

5800

Min. Fuel Consumption Rate



(g/kW·h)

250

Oil and Fuel Consumption
Percentage

≤ 0.15

Fuel Octane Number (Not Less
Than)

Unleaded gasoline, octane number 93

Oil Octane Number

In Summer

SAE 10W-40 (SM grade or higher)

In Winter

SAE 5W-40 (SM grade or higher)

Oil Capacity (L)

3.9 ± 0.5

Crankshaft Rotation Direction

Counterclockwise (viewed from cross section of engine flywheel)

Starting Type

Electrical starting

Cooling Type

Forced circulation type antifreeze cooling

Lubrication Type

Compound type (pressure, splash lubrication)

Fuel Pressure (bar)

Cylinder Compression
Pressure (bar)
(180 ~ 250) r/min

10 - 13.5

Oil Pressure (kPa)

Low Idling Speed (700 ± 50 r/min)

Higher than 150 kPa

(when oil temperature is 90°C)

High Idle Speed (2000 r/min)

Higher than 360 kPa

(when oil temperature is 90°C)

High Speed (4000 r/min)

Higher than 470 kPa

(when oil temperature is 90°C)

Thermostat Operation
Temperature (°C)

Open Temperature

87 ± 2

Full Open Temperature

102

Net Weight (kg)

148

Boundary Dimension (Length ×
Width × Height) (mm)

641 × 613 × 644

Starting Performance

With atmospheric temperature at -25°C, engine can start smoothly within
30 seconds without taking special measures. Starting test shows that
staring can be performed 3 times consecutively. If it fails to start once,
perform starting again after 2 minutes.

Item

Specification

07–

Engine Mechanical Specifications

Item

Specification

Camshaft

Cam Height (mm)

Intake Cam

37.65

Exhaust Cam

37.06

Camshaft Journal

Diameter (mm)

Intake

23.947 - 23.960

Exhaust

23.947 - 23.960

Camshaft Axial

Clearance (mm)

Intake

0.15 - 0.20

Exhaust

0.15 - 0.20

Cylinder Head

Lower Surface Flatness (mm)

0.04

Overall Height (mm)

139.83 ± 0.335

Surface Grinding Limit

Grinding is not permitted

Valve

Valve Head Margin

Thickness (mm)

Intake Valve

0.9

Exhaust Valve

0.7

Valve Stem Diameter

(mm)

Intake Valve

5.98 ± 0.008

Exhaust Valve

5.96 ± 0.008

Grommet Width (mm)

Intake Valve

2.263

Exhaust Valve

2.828

Clearance Between

Valve Stem and Guide

(mm)

Intake Valve

0.012 - 0.043

Exhaust Valve

0.032 - 0.063

Grommet Cone Angle (°)

Intake Valve

90 - 90.5

Exhaust Valve

90 - 90.5

Height (mm)

Intake Valve

107.998

Exhaust Valve

106.318

Valve Spring

Free Height (mm)

47.7

Operating Preload/Operating Height

260 ± 11 N/41 mm

Valve Guide

Valve Guide Length (mm)

38 ± 0.25

Inner Diameter (mm)

6 - 6.015

Outer Diameter (mm)

11.040 - 11.051

Depression Depth (mm)

16 ± 0.3

Valve Stem Protrusion Amount (mm)

31.497 - 31.515

Piston

Piston Skirt Diameter (mm)

83.455 ± 0.009

Piston Ring

Side Clearance (mm)

First Ring

0.04 - 0.08

Second Ring

0.025 - 0.070

End Gap (mm)

First Ring

0.2 - 0.4

Second Ring

0.4 - 0.6

Height (mm)

First Ring

1.2

Second Ring

1.5

Oil Ring

2.5

-0.01
-0.05

-0.006
-0.050

Content .. 102 103 104 105 ..