SSANGYONG RODIUS 2004.09 Manual page 212

1. ELECTRONIC CONTROL OF FUEL SYSTEM
System composition
- High pressure fuel pump
- Fuel injector
According to input signals from various sensors, engine ECU calculates driver's
(position of the accelerator pedal) and then controls overall operating performance of engine
and vehicle on that time.
ECU receives signals from sensors via 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 is generated by
variable resistance changes in accelerator pedal sensor. Air flow (hot film) sensor detects
intake air volume and sends the signals to ECU. Especially, the engine ECU controls the air-
fuel ratio by recognizing instant air volume changes from air flow sensor to decrease the
emissions (EGR valve control). Furthermore, ECU uses signals from coolant temperature
sensor and air temperature sensor, booster pressure sensor and atmospheric pressure sensor
as compensation signal to respond to injection starting, pilot injection set values, various
operations and variables.
- Fuel rail
- Electronic control unit(ECU)
1881-01
Supply line
Return line
ECU connecting line
- Fuel pressure sensor
- Other sensors and actuators
demand
ENGINE FUEL SYSTEM
RODIUS 2004.09
03-7