Great Wall GW491QE, Руководство по обслуживанию

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EF.2-5
The฀desired฀idle฀speed฀is฀determined฀by฀various฀elements:
When฀the฀engine฀water฀temperature฀is฀lower,฀system฀will฀give฀a฀greater฀desired฀idle฀speed฀1200r/min฀to฀accelerate฀the฀warming
฀฀of฀vehicle;฀For฀engine฀using฀mechanical฀fan£¬when฀the฀temperature฀of฀engine฀coolant฀is฀much฀higher,฀system฀will฀give฀a฀greater
฀฀idle฀speed฀1300r/min฀as฀well฀to฀increase฀air฀inflow฀amount฀inside฀the฀cooling฀water฀tank.
Applied฀load:If฀the฀air฀conditioner฀changes,฀system฀will฀increase฀the฀idle฀speed฀150r/min.
To฀compensate฀the฀electrical฀power฀consumption฀when฀the฀dipped฀headlight฀is฀opened,฀the฀desired฀idle฀speed฀will฀increase฀by
฀50฀r/min.
System฀voltage฀compensation:When฀system฀voltage<12V,฀system฀will฀auto.฀increase฀the฀desired฀idle฀speed฀150r/min.
Vehicle฀speed฀compensation:฀The฀desired฀idle฀speed฀while฀vehicle฀is฀traveling฀will฀be฀increase฀by฀50r/min฀when฀compared฀to
฀฀that฀while฀vehicle฀is฀parking.
Decelerating฀adjustment:฀when฀the฀vehicle฀is฀decelerating฀or฀being฀stopped,฀the฀speed฀will฀decreased฀gradually฀and฀degressively
฀to฀the฀desired฀idle฀speed฀for฀vehicle฀parking.
4.฀Oil-injection฀pulse฀width฀contro
5 K nock฀contr ol฀logic
K nock฀control฀function฀is฀applied฀to฀eliminate฀possible฀knock฀which฀may฀happen฀when฀engine฀is฀under฀a฀combustion฀condition,
and฀to฀optimize฀the฀dynamic฀performance฀of฀engine,฀and฀the฀cost-effectiveness฀of฀fuel.
MT 20U฀system฀is฀competent฀to฀provide฀a฀separate฀knock฀control฀over฀various฀cylinders฀inside฀engine.
Work฀condition฀for฀knock฀control
-E ngine฀shall฀be฀running,฀and฀the฀running฀time฀must฀exceed฀two฀seconds;
-E ngine฀rotating฀speed฀>800r/min
-A bsolute-pressure฀of฀inlet฀manifold40฀kPa
K nock฀control฀ mode
-Stable฀knock฀control Once฀a฀knock฀occurs,฀the฀system฀will฀quickly฀delay฀the฀ignition฀lead-angle฀to฀remove฀the฀knock.
-Instantaneous฀knock฀control A฀knock฀is฀easy฀to฀occur฀when฀making฀a฀sharp฀acceleration.฀When฀a฀knock฀is฀predicted฀to occur,
the฀system฀will฀auto.฀delay฀the฀ignition฀lead-angle฀to฀avoid฀the฀occurrence฀of฀any฀out-of-limit฀(strong)฀knock.
-Adaptive฀knock฀control If฀an฀abraded฀engine฀is฀running,฀the฀system฀will฀auto.฀make฀an฀adaptive฀adjustment฀over฀the฀฀ignition฀lead-
angle฀to฀prevent฀the฀occurrence฀of฀strong฀knock.
A mathematic model for
velocity-density is used to
determine the basic
oil-injection amount
absolute-pressure of inlet manifold
modification to closed-loop
constant of injector
modification to supply voltage
air-inflation temperature
air flow
air-inflation efficiency
self-learning modification
thicker when accelerating
thinner when decelerating
oil-cut when decelerating
waste-gas circulation
Oil-injection pulse width
air /fuel ratio
Delphi฀engine฀management฀system-MT20U฀system฀control
Fuel
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