GF07.61-P-3032AM ME-SFI TWC Heating-Up, Function

GF07.61-P-3032AM ME-SFI TWC Heating-up, Function
ENGINE 113.990 in MODEL 211, 219
ENGINE 113.991 in MODEL 215, 220
ENGINE 113.992 in MODEL 230 up to Model Year 2008
ENGINE 113.993 in MODEL 463 up to 31.5.12
ENGINE 113.995 in MODEL 230 up to Model Year 2008





B11/4 Coolant temperature sensor
K17 Air injection relay (models 211, 219)
K40/4kN Air pump relay (model 230 up to 06/2002)
K40/4kO Air pump relay (model 230 from 07/2002)
K40/7kN Air pump relay (model 215, 220)
L5 Crankshaft position sensor
M16/6 Throttle valve actuator
M33 Electric air pump
N3/10 ME control unit
N10/1kO Secondary air pump relay (model 463)
N15/3 EGS control unit
R4 Spark plugs
T1/1-
T1/8 - Cylinder 1 to 8 ignition coils
Y32 Air pump switchover valve
Y62 Fuel injection valves

CAN Data bus (Controller Area Network)

Heating of the TWC is designed to heat up the catalytic converters more rapidly to its operating temperature and thus to sharply reduce the exhaust gas emissions at cold start.

The following systems are involved:
^ Ignition system In the idle speed range and in line with the coolant temperature the ignition angle is retarded for e.g. 20 seconds in order to increase the exhaust gas temperature.
^ Idle speed control Dependent on coolant temperature the idle speed is increased to approx. 1100 to 1300 rpm for up to 20 seconds.
^ Transmission shift delay The automatic transmission switches up later depending on the coolant temperature.
^ Air injection The injected air causes post-oxidation (after burning) in the catalytic converters.