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1.2L REVOTRON ENGINE
176
IV. FUEL INJECTORS
COMPONENT DETAILS
Injectors are normally closed valve. Injector opens
when its electromagnetic coil is energized by the
EMS ECU.
COMPONENT LOCATION
PRELIMINARY CHECKS
1. Loose/ Damaged Connections between
injector and EMS ECU.
2. Check for back out of pins at both Injector
connector and ECU connector.
3. Check for damage of pins at both injector
connector and ECU connector.
4. Check the continuity from injector connector
pins to the ECU pins.
CONNECTOR DETAIL
PINOUT DETAILS
PIN
DESCRIPTION
1
Ground
2
Supply
COMPONENT SPECIFICATION
The injector is an indirect electrically driven valve
(nozzle) that sprays high pressure fuel in an
engine combustion chamber. The fuel delivery is
a function of the pressure at the nozzle seat.
Functional Characteristics:-
A:- Pressure Range:-
Min operating pressure:- The injector starts to
inject at an inlet pressure ± 4 bar Max normal
operating pressure:- The maximum nominal
operating inlet pressure under normal conditions
is 4 bar.
Max peak operating pressure:- The injector is able
to endure up to 4 bar inlet pressure for 10 hours
and the injector characteristics remain within
original tolerances when a normal operating
pressure is used after this condition.
The fuel injector is solenoid ball valve, top feed
with a 2 pin connector. The solenoid valve
normally closed by a ball and a cone seat, opens
when the electromagnetic core is energized. Fuel
under pressure in common rail flows through
metering orifice, where fine atomization of the fuel
takes place and flows consistently for a given
injector opening time. The injector which is
normally in closed position, receives drive signal
from ECU to open for a given pulse width (few
milli seconds), depending on the engine operating
conditions.