SsangYong Actyon Sports II. Manual — part 12

02-14

The strut type tensioner automatically adjusts the belt tension to provide the reliability and durability for

the system. And, the belt tension is decreased to minimize the friction loss and improve the belt

operating noise.

1) Crankshaft Pulley (Isolation Damper)

(1) Overview

(2) Sectional drawing

Axial & radial bearing

Sleeve

Hub

Isolation pulley rubber

Pulley

Damper rubber

Inertia ring

02-15

0000-00

(3) Features

Rubber damper: Decrease crankshaft torsion

Improve belt NHV: Reduce unbalance speed to crankshaft due to irregular combustion

Minimize noise: Anti-vibration from crankshaft and belt

Post bonded type rubber damper: Improve durability of rubber damper

1.

2.

3.

4.

02-16

2) Belt Tensioner

(1) Overview

The torque deviation from crankshaft affects the components in belt drive system and the belt

movement. The auto tensioner system is to adjust this deviation automatically.

In D20DTR engine, one of the mechanical tensioner, pivot damped tensioner is used to keep the

damping force, system reliability and durability. The single belt drive system needs to use the automatic

belt tensioning device to transfer the power to pulleys effectively. To get this, the tensioner uses the

spring and damping unit.

(2) Location

Belt tensioner

02-17

0000-00

Brake booster and naster

cylinder

Vacuum pump

Pump capacity: 210 cc/rev
Camshaft speed: 375 to 3,000 rpm
Lubrication temperature: -40 to
155°C
Oil: 5W30
Drive type: Driven by exhaust
Camshaft sprocket

2. VACUUM PUMP

Vacuum pump generates the vacuum pressure and supplies it to EGR cooler bypass solenoid. This

pump is single vane type and displacement is 210 cc/rev. The lubrication oil is supplied through the hole

in hollow shaft.

Components

▶

EGR cooler bypass valve

This valve is controlled by ECU.
When the engine is cooled, the
exhaust gas goes to combustion
chamber without passing through
EGR cooler because the valve is
closed by vacuum pressure.