gio Vyper 4WD 1100cc 4 seater XY1100UEL, Service Manual

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11. EFI SYSTEM OF SQR 472ENGINE
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4) Installation notes
Requirements for fixed bolt and nut firmly, to prevent loosening caused by vibration, ignition coil,
mechanical damage.
5) Fault phenomenon and judgment method
The high-pressure line on the engine pulled out, the spark plug on good, will spark plug metal shell
on the engine body, by the spark plug spark ignition coil and the high-voltage wire to judge whether
good.
15. Three way catalytic converter
1) Installation position
Welding in the exhaust manifold pipe assembly
2) Working principle
In the three way catalytic converter, CO, HC, NOx respectively, the reduction reaction of oxidation
of harmless CO2, H2O and N2, containing precious metal platinum in the carrier (Pe) and (Pd) and
rhodium (Rh) of noble metal catalysts. Reaction formula of it as follows: 2CO2NO==2CO2N2
4HC10NO==4CO22H2O5N2. There is a close relationship between the catalyst efficiency height
and temperature, the use of harmful components from the exhaust gas temperature to ideal
operating condition transformation temperature more than 300 degrees Celsius and the catalytic
converter for 400-700 degrees, the maximum allowable temperature is 850-920 degrees Celsius, or
noble metal may produce thermal aging, mainly due to activation surface temperature failure and
alumina sintering. Catalytic converter conversion efficiency and air-fuel ratio, in the ideal air-fuel
ratio (14.7:1) narrow area is (14.5-15.0) catalyst for CO, HC and NOx conversion efficiency
reached the highest at the same time. When the air-fuel ratio is too thick, the pollutant conversion
Efficiency were decreased, CO and HC is more obvious; while too thin when CO and HC
conversion efficiency significantly, NOx was significantly lower.
3) Installation notes
Transport and installation, should be light-light, forbid throwing. If you hear the three way catalytic
converter assembly has abnormal noise, possible catalyst carrier rupture, exploratory confirmation.
To add high quality gasoline engine failure, to prevent poisoning catalyst, influence the emission.
4) Fault phenomenon and judgment method
If the exhaust pipe assembly has abnormal noise, or the exhaust back pressure is too high, or driving
performance variation accelerate the powerless, visually exploration catalyst carrier is melting the
blockage, or rupture.
16, The other is connected with ECU signal
1 Power supply V_RLY
2 Fault display signal ECU X1_107 MIL
1 CAN High ECU X1_17 CAN 1_N
Malfunction
indicator
lampCAN
Line for Tool
2 CAN Low ECU X1_6 CAN 1_L
That engine speed signal of engine tachometer ECU X1_66 ESS
The speed signal (Holzer) ECU X1_12 VS
Signal A ECU X1_12 EXAP Air conditioner evaporator
temperature sensor
Signal B ECU X1_13 EVAP_G
ND
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