Engine Control System; Ecu - SSANGYONG 2004 Rexton 2.7XDi Workshop Manual

DI08-6

ENGINE CONTROL SYSTEM

ECU

According to input signals from various sensors, engine ECU calculates driver's demand (position of the accelerator
pedal) and then controls overall operating performance of engine and vehicle on that time.
ECU receives signals from sensors through data line and then performs effective engine air-fuel ratio controls based on
those signals.
Engine speed is measured by crankshaft speed (position) sensor and camshaft speed (position) sensor determines
injection order and ECU detects driver's pedal position (driver's demand) through electrical signal that generated by
variable resistance changes in accelerator pedal sensor.
Air flow (hot film) sensor detects intake air volume and then transmits to ECU. Especially, the engine ECU controls the
air-fuel ratio by recognizing instant air volume changes through air flow sensor to pursue low emission gases (EGR valve
control). Furthermore, the ECU uses signals from coolant temperature and air temperature sensor, booster pressure
sensor and atmospheric pressure sensor as compensation signal to respond to injection start and pilot injection set
values and to various operations and variables.
Y220_08004
ENGINE CONTROL SYSTEM
CHANGED BY
EFFECTIVE DATE DI ENG SM - 2004.4
AFFECTED VIN