SsangYong Korando III (2010 year). Service manual — part 333

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ENGINE CONTROL

SYSTEM

Engine ECU (D20DTF)

1. OVERVIEW

The components in the fuel system supply fuel and generate high pressure to inject fuel to each injector.

They are controlled by the engine ECU.

The common rail fuel injection system consists of fuel tank, fuel line, low pressure line which supplies low

pressure fuel to the low pressure pump (includes high pressure pump), high pressure line which

connected to the injector and the engine control unit (ECU) which calculates the accelerator pedal

position and controls the overall performance of vehicle based on the input signals from various sensors.

HP fuel pump

Common rail and

Injector

Fuel filter

(Priming pump)

Fuel supply tube

Fuel return tube

Fuel tank

Fuel neck

Fuel sender (main)

Fuel sender (sub)

Low pressure line

High pressure line

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Fuel rail assembly

Relieves the pulsation.
Measures the fuel pressure.
Distributes the fuel to injectors.

Camshaft position sensor

Determines the injection order.

Injector (C3I)

Pre-injection, main injection, after-injection by
signals from ECU

Fuel tank

Fuel metering by dual sender. Supply the fuel in
main fuel tank and sub fuel tank through fuel
inlet tube

2. SYSTEM LAYOUT AND OPERATION

1) Layout

Fuel supply line

Fuel return line

For sensor and actuator control logic,

refer to Chapter "ENGINE CONTROL".

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0000-00

Crankshaft position sensor

Measuring engine rpm

T-MAP sensor

Measuring booster pressure
and temperature

HFM

Measuring intake air mass and
temperature

Engine ECU (D20DTF)

Engine control by various
signals

High pressure pump

Generates the high pressurized fuel
and supply it.

Plunger type HP pump (1,800

bar)

Vane type transfer pump (6bar)

Accelerator pedal

position sensor

Detects driver's intention for
speed up/down

Fuel filter assembly

Supply clean fuel/fuel
heating/water separation by
priming pump