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ENGINE MANAGEMENT SYSTEM
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COMPONENTS OF EMS
Electronic Control Unit
1
.
Description & Working Principle
The ECU continuously monitors the operating conditions of the engine through the system
sensors. It also provides the necessary computation, adaptability, and output control in order to
minimize the tailpipe emissions and fuel consumption, while optimizing vehicle drivability for all
operating conditions. The ECU also provides diagnosis when system malfunctions occur.
2
.
Handling – DOs & DONTs
ECU Handing
ACTION REASON
DO NOT
:
Place the ECU close to the exhaust
pipe or Engine when removed
High temperature might reduce the life of the
ECU and also can damage the ECU
DO NOT
:
Place the ECU close to or pour
water, oil or any other liquids.
ECU is susceptible to water and liquids
DO NOT
:
Allow mud or other debris to
accumulate on the surface of the ECU
Having mud or debris accumulated on the
ECU casing reduces its heat dissipation
efficiency.
DO NOT
:
Apply any voltage relative to any
point to the ECU
Drastically affects the performance of the
ECU and may lead to ECU damage
DO NOT
:
Clean ECU with any solvent or any
corrosive liquid
Can damage the housing of the ECU
DO:
Take
extreme care that water droplets or
excess moisture should not fall on ECU
connectors
ECU connectors can get short and may
lead to ECU damage
DO:
Clean the ECU with a moist cloth and
keep it dry
Prevents ECU damage
3
.
Installation requirements
The ECU shall be mounted using M5 machined screws with a torque of 3.9Nm ± 10%. The
mounting surface should also be flat to avoid subjecting the base plate to unnecessary force and
warping the PCB.
4
.
Maintenance service and Repair
ECU is a non-serviceable part. Once there are problems, it’s important to first determine if the
problem is caused by software/calibration. If it is caused by software/calibration, please refer to
software/calibration reflashing procedure. In the event of ECU hardware failure or malfunction
(during warranty period only) the ECU should be sent back to the vehicle manufacturer giving
complete details of the ECU Part No, Serial number, Vehicle Model & Make, manufacturing Date,
Total kms run on the vehicle, Location of use, Vehicle No, Date of return.
ENGINE MANAGEMENT SYSTEM
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Multec 3.5 Injectors
1
.
Description and Working Principle
The Multec 3.5 Fuel Injector is an electromechanical device. A magnetic field is generated as
voltage is applied to the solenoid coil.
The resulting magnetic force lifts the core assembly, overcoming manifold vacuum, spring force,
and fuel pressure, allowing fuel to pass through the ball and seat interface to the director.
As the fuel passes through the director, an atomized spray is developed. The injector closes
when the voltage is removed, cutting off the fuel flow.
2
.
Handling - DOs & DONTs
3.5 FUEL INJECTOR HANDLING
ACTION REASON
DO NOT
:
Re-use injector seal rings if at all
possible. If no other choice exists, take
extra care in inspecting the seal rings for
damage.
Leakage.
DO NOT
:
Dip injector tips into lubricants.
Can plug injector spray orifices.
DO NOT
:
Cycle injector repeatedly without
fuel pressure.
Damage to internal mechanical components.
DO NOT
:
Pulse (actuate) a suspected high
leak rate injector (leak >50 sccm air).
Can dislodge internal contamination if
present and preclude root cause analysis.
DO NOT
:
Allow water to enter fuel system
from air lines, etc. during leak checks.
Can damage injectors.
DO NOT
:
Contact or apply load to the
injector tip for installation.
Apply load to 45 deg angle on nylon over
mold see
DO NOT
:
Pound injectors into manifold
during assembly to engine.
Can damage injectors or seal rings.
DO NOT
:
Apply excessive side loads to
electrical connectors.
May cause loss of electrical continuity.
DO NOT
: Use any dropped unit.
Internal damage may have occurred.
DONOT
:
Store injectors, rails, or
subassemblies including engines on which
the injectors have been installed in an
unprotected environment.
External contamination can damage the
injector electrically and/or mechanically.
DO NOT
:
Use the injector as a handle.
Do not use the injector to lift assemblies
DO NOT
:
Rack, stage, or handle parts in a
manner that allows contact between parts.
Damage will occur.
DO NOT
:
Remove packing in a way that
allows contact between parts.
Damage could occur due ton contact
between parts.
Содержание HS200UTV
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Страница 94: ... 79 SPECIFICATIONS 79 HYDROGRAPHIC CHART Hydrographic chart Pressure ...
Страница 95: ... 80 SPECIFICATIONS 80 LUBRICATION OIL WAY LUBRICATION OIL WAY Pressure splashing oil ...
Страница 248: ... 233 CHASSIS 233 Fuel tank cap Remove the fuel tank cap by turning it counterclockwise ...
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Страница 312: ...TM HISUN MOTORS 310 East University Dr McKinney Texas 75069 PH 972 446 0760 TF 877 838 6188 hisunmotors com ...