SsangYong Actyon Sports II. Manual — part 46

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1. SPECIFICATION

Item

Specification

E-EGR valve

Motor

EGR response time

50 ms

Driven by

DC motor

Valve

EGR gas flow rate

120 kg/h

Cooling capacity

8.3 kW or more

Cooling fin type

Wavy fin

Cooler type

U-shaped

E-EGR bypass valve

Solenoid valve

Drivien by

Vacuum

(Solenoid valve)

E-EGR cooler

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1. SYSTEM DESCRIPTION

1) Overview

The EGR (Electric-Exhaust Gas Recirculation) valve reduces the NOx emission level by recirculating

some of the exhaust gas to the intake system.

To meet Euro-V regulation, the capacity and response rate of E-EGR valve in D20DTR engine have been

greatly improved. The EGR cooler with high capacity reduces the Nox, and the bypass valve reduces the

CO and HC due to EGR gas before warming up.

Also, the engine ECU adjusts the E-EGR opening by using the air mass signal through HFM sensor. If

the exhaust gas gets into the intake manifold when the EGR valve is open, the amount of fresh air

through HFM sensor should be decresed.

Benefits of E-EGR valve

▶

Improved accuracy and response through electric control

Feedback function (Potentiometer)

Preventing chattering of EGR valve and improved durability

Self-cleaning function

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E-EGR valve

Receives the electric signal from the ECU to
control the valve.

E-EGR cooler and bypass valve

The cooler lowers the high temperature of the
exhaust gas and the bypass valve directly
supplies the exhaust gas to the intake duct
without passing through the EGR cooler to
reduce the emission of exhaust gas before
warming up the engine.

2) Location and Components

HFM sensor

Used as a main map value to control the EGR.
The coolant temperature, engine rpm, engine
load, intake air temperature (HFM: decreased at
60˚C or more), atmospheric pressure
(atmospheric pressure sensor: altitude
compensation) are used as auxiliary map values.

EGR pipe

Transports the exhaust gas from the EGR cooler
and EGR bypass valve to the intake duct.

See the section "Engine control" for E-EGR

valve control logic.

EGR cooler

EGR bypass

For details, see the section "Engine control".

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2. OPERATING PROCESS

1) Schematic Diagram