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燃油系统(
fuel
system
)
燃油系统
(
fuel
system
)
Fuel
lift
up
and
put
down
is
called
weight
lifting,
lift
up
and
put
down
is
called
weight.
The
head
must
have
the
courage,
the
rise
should
be
emboldened.
Learning
to
add,
proud
to
be
reduced,
the
opportunity
to
travel,
in addition to lazy
to. The three problems of life: thinking,
love, Unrequited love. First, training
objective: 1) master
the rapid
diagnosis method of oil pressure relief method and
circuit fault 2) master the
maintenance method of electric
fuel
pump and fuel injector fuel system Two, the
content of
training: 1)
the
oil pressure
relief
system 2)
detection
of
vehicle
fuel
system
3)
electric
fuel
pump
inspection
and
testing 4)
inspection
and
testing
of
electromagnetic
injector
Three,
training
equipment,
tools
and
materials Santana
2019,
the
fuel
pump
assembly,
fuel
injector
assembly.
The
oil
pressure
gauge,
digital
multimeter,
manual
vacuum
pump,
injector
cleaning
machine,
common
tools,
with
scales,
containers, cotton yarn, gasoline, wire
etc. Four, training
operation:
1,
the
oil
pressure
relief
system
From
the
entrance
of the fuel filter pressure relief pipe joint The
pressure relief valve pressure relief
The dynamic pressure
1
/
8
relief The
injector with pressure relief The manual vacuum
pump with pressure relief Detection of
2, the fuel system of
the car 1) in
the power supply voltage is not less than 12V,
switch
off
the
ignition,
remove
the
battery
strap. 2)
pressure
gauge
pressure
relief
after
loading
of
gasoline,
gasoline
pump
power and short
circuit. 3) put on the battery strap, the
ignition
switch
is
in
the
ON
position,
the
gasoline
pump
pressure test. If the pressure is too
high, then replace the
pressure
regulator;
if
the
pressure
is
too
low,
then
check
the
fuel pump, fuel filter
and pressure regulator for leaks. 4)
the
ignition
switch
for
the
OFF
position,
remove
the
fuel
pump
short wiring. 5) to
start the engine, the idle state of the
pressure measuring system. If the oil
pressure of the system
is
not
in
the
specified
range,
check
the
vacuum
tube
and
pressure
regulator.
6).
Remove
vacuum
hose
from
the
oil
pressure regulating,
plug the hose. The test pressure shall
comply
with
the
provisions. 7)
off
after
five
minutes
to
check
the
oil
pressure,
such
as
drop,
check
the
fuel
pump
and
pressure
regulator for leaks. 8) pressure
relief, remove the strap,
remove
the
oil
pressure
gauge. 9)
after
loading
complex
leak.
3, the fuel pump test
Test the working condition of the fuel
pump
should
ensure
the
battery
voltage
is
normal,
the
gasoline
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pump
fuse
is
normal,
normal
gasoline
filter. 1)
gasoline
pump
circuit check ON (ignition means
connected to the ignition
switch),
gasoline
pump
should
be
able
to
hear
the
startup
sound,
if
a
finger
pinch
pipeline
should
be
able
to
feel
the
pressure.
If the fuel pump
does not start, should check the fuel pump,
gasoline
and
fuel
pump
relay
control
circuit. OFF
(meaning
the
ignition
switch
off
ignition),
fuel
pump
relay
must
have
action,
otherwise
check
the
fuel
pump
relay
line,
if
the
line
is
normal,
the replacement of
fuel pump relay. If the fuel pump relay,
gasoline pump is still not working. The
ignition switch is
closed,
with
a
multimeter
measuring
gasoline
pump
power
supply
voltage on the conductor, the voltage
value is about normal
battery
voltage
(about
12V).
If
the
voltage
does
not
reach
the
specified value, you need to find and
remove the fuel pump
circuit circuit
fault; if the voltage reaches the specified
value, take the lead wire colleagues
found no gasoline pump
circuit, that
electric fuel pump failure, should check the
replacement
of
fuel
pump. 2)
test
gasoline
pump The
ignition
OFF from gasoline pump electric plug.
The resistance meter
gasoline pump coil
resistance, if not within the specified
scope, then replace the gasoline pump
assembly. The power
3
/
8
supply
to
the
gasoline
pump
plus
12V
(note
the
polarity),
check
the running condition of the gasoline
pump. If not normal,
replace
gasoline
pump
assembly. Note:
this
experiment
should
be
completed
to
avoid
burning
gasoline
pump
coil
in
10S,
while
the
gasoline
pump
away
from
the
battery. 3)
measuring
gasoline
pump
supply
The
ignition
OFF
The
pressure
relief
after
receiving the pressure gauge on the oil
pipe. The hose to the
oil return pipe,
and into the cup. The use of joint wire
shorted
fuel
pump
relay
contacts
and
battery
positive
terminal,
the
steam
pump
operation
system
hydraulic
power. The
empty
cup.
The
switch
on
the
gasoline
pump,
make
it
work.
Pump
oil
measurement
within
the
prescribed
time,
compared
to
a
predetermined
value.
If
you
do
not
reach
the
minimum
amount
of
oil,
possible causes for the pipeline bending or
obstruction,
gasoline pump failure
etc.. Detection of
4.
injector
1)
injector
inspection, (1) check the working condition of
the
fuel injector when the engine is
running, touch the injector
or
use
a
stethoscope
to
check
the
fuel
injector,
to
see
whether
the
machine work is consistent with the engine speed.
If not
normal, check the fuel injection
signal ECM output. If the
fuel
injector is difficult
to
close, the method
can
be used
to
check
off
the
fire.
Check
the
action
to
be
fast,
failure
or
long
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