Lifan X60, Руководство по обслуживанию

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LIFAN X60 Service Manual
lowest air-fuel ratio point (LBT) nearby the outer characteristic point, so as to correct
ignition angle to reach MBT point.
(5) Ignition angle compensation controlled by valve timing
After valve timing control system is actuated, engine intake and exhaust overlap angle
will change and influence internal exhaust gas recirculation rate and in-cylinder
temperature. For different valve timings, it is required to correct ignition advance angle,
so as to ensure the best ignition advance angle under current valve timing.
(6) Deceleration fuel cut-off correction
When stopping deceleration fuel cut-off, ignition angle may be corrected to make throttle
close and exit smoothly.
(7) A/C control correction
Close A/C and correct the ignition advance angle when the engine is at idle speed so as
to make engine speed transit smoothly.
Electronic Throttle Body Functional Restriction Mode
1. Forced flameout mode: ECM reported faults mean that air intake system or throttle
body cannot control air intake flow well. The countermeasure is to cut off fuel, ignition
and throttle, stall engine and no longer output power.
2. Power management mode of forced idle speed: When the engine is at idle speed, The
ETC system cannot reliably use throttle to control engine power, at this moment, the ETC
will cancel its control for throttle and its opening will return to default status. The power
of engine can only be controlled by conrtoling a cylinder’s fuel injection and delaying
ignition angle.
3. Forced idle speed mode: When there is no reliable access to catch a driver’s intent, For
instance, all pedal signals fail, The engine can only work at idle speed to maintain its
cooling, heating, Power supply and lighting functions. The engine will make no response
when the accelerator pedal is depressed, so it is unable to drive a vehicle under this mode.
4. Restricted power management mode: The ETC system cannot use throttle properly to
control engine power. Under this mode, the system will judge idle speed or acceleration as
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