Great Wall GW491QE, Руководство по обслуживанию

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EF.2-3
Delphi฀engine฀management฀system-Description฀of฀system
System฀characteristics:
I
ts฀fuel฀supply฀to฀engine฀and฀the฀idle-speed฀is฀subject฀to฀a฀closed-loop฀control฀system,฀which฀may฀eliminate฀the฀manufacturing
difference฀between฀the฀system฀and฀other฀relevant฀mechanical฀parts฀&components,฀increase฀the฀integrity฀of฀whole฀vehicle,฀and
reduce฀the฀possibility฀of฀tolerance฀produced฀on฀vehicle฀due฀to฀abrasion฀in฀practical฀use;฀The฀system฀has฀divided฀four฀engine
cylinders฀into฀two฀groups:฀group1-4,฀and฀group฀2-3,฀usable฀for฀a฀control฀over฀fuel฀supply฀and฀ignition฀respectively,฀which฀may฀have
the฀structure฀of฀system฀best฀optimized฀and฀simplified,฀reducing฀the฀cost฀of฀parts฀&components฀in฀manufacturing฀and฀fabrication;
The฀system฀has฀been฀provided฀with฀a฀three-way฀catalytic฀converter,฀usable฀for฀a฀post-processing฀on฀gas฀having฀combusted฀inside
the฀engine,฀which฀will฀be฀conversed฀into฀nonharmful฀gas฀and฀exhausted฀to฀the฀atmosphere.
Function฀of฀ITMS-6฀system:
-Measure฀the฀position฀reference฀of฀crankshaft฀and฀the฀rotating฀speed;
-Air฀velocity฀&density฀computation;
-Multi-point฀fuel฀injection฀by฀group฀when฀under฀a฀closed-loop฀control,฀a฀simplified฀system฀structure,฀and฀a฀decreased฀processing
cost.
-A฀direct฀high-capacity฀ignition฀(without฀ignition฀distributor),฀assures฀an฀accurate฀and฀valid฀ignition,฀with฀less฀interference ,฀and
without฀adjustment฀required.
-Self-learning฀function฀is฀provided฀for฀the฀closed-loop฀control฀to฀effectively฀eliminate฀the฀tolerance฀resulting฀from฀the฀manufacturing
and฀abrasion฀of฀mechanical฀parts,฀and฀to฀enhance฀the฀integrity฀&consistency฀of฀whole฀vehicle.
-Step฀motor฀is฀with฀a฀closed-loop฀control฀over฀idle-speed;
-Play฀&plug฀control฀applied฀to฀the฀air฀conditioner฀system฀and฀the฀cooling฀system.
-Fuel฀cut฀/overflow฀control:฀when฀a฀‘flooded฀engine’฀is฀produced,฀step฀on฀the฀gas฀to฀a฀Max.฀extent฀to฀stop฀fuel฀injection฀based฀on
a฀computer฀control.
-The฀fuel-cut฀control฀when฀decelerating฀saves฀fuel฀and฀decreases฀the฀exhaust.
cooling-system
control
temperature signal for 2
nd
evaporator
evaporating
&exhausting
diagnosis request signal
Diagnostic & theft-
prevention signal
theft-detector control signal
EGR feedback signal
signal for 2
nd
oxygen sensor
signal for fuel level sensor
MT20U
Engine
control
module
ECU
12V accumulator jar power supply
12V ignition-switch power supply
system power-supply ground wire
ignition &oil-injection ground
5V reference voltage
5V reference voltage feedback
system
power-supply
management
speed & crankshaft position sensor
engine cylinder No. identification signal
absolute-pressure sensor for inlet
manifold
throttle position sensor
coolant temperature sensor
inlet air temperature sensor
oxygen sensor
vehicle speed sensor
dynamic steering signal
system
power-supply
input
air conditioner request signal
air conditioner load signal
temperature signal for 1
st
evaporator
air conditioner
system signal
standby
European-III
signal
idle-speed
system
control
air conditioner
system control
standby
European-III
system control
communication
&theft-prevention
system control
idle-speed control valve A/Hi
idle-speed control valve A/Lo
idle-speed control valve B/Hi
idle-speed control valve B/Lo
carbon-canister wash solenoid valve
electrical cooling (high-speed)fan
relay
electrical cooling (low-speed)fan
relay
air conditioner clutch relay
air conditioner fan relay
engine rotating-speed signal
engine fault indicator light
Serial communication
K W2000
theft-detector control
linear EGR control valve
ignition
systemcontrol
ignition coil A
ignition coil B
fuel pump relay
fuel injector A
fuel injector B
fuel injector C
fuel injector D
fuel supply
system
control
The฀basic฀structure฀of฀MT20U฀system฀is฀as฀shown฀in฀the฀figure฀below:
ProCarManuals.com