gf1430p3012d

Secondary air injection function

Type gf · emne 14.30 · version 0103 · 2007-03-20

Gælder for: ENGINE 104.941 with CODE (491) up to Model Year 95 USA version ENGINE 104.942 with CODE (491) USA version ENGINE 104.991 with CODE (491) up to Model Year 95 USA version ENGINE 104.992 with CODE (491) USA version ENGINE 104.994 with CODE (491) up to Model Year 95 USA version

Ikke tilgængelig på “da”; vises på Engelsk.

Placering

Funktionsgruppe 1 Motor › 14 Udstødningsmanifold, motorbremse, udstødningsrenseanlæg › 14.30 Luftindsugning

Gælder også for motorer/gearkasser: 104 941, 104 942, 104 991, 104 992, 104 994

GF14.30-P-3012D

Secondary air injection function

22.10.96

ENGINE 104.941 with CODE (491) up to Model Year 95 USA version

ENGINE 104.942 with CODE (491) USA version

ENGINE 104.991 with CODE (491) up to Model Year 95 USA version

ENGINE 104.992 with CODE (491) USA version

ENGINE 104.994 with CODE (491) up to Model Year 95 USA version

15.03.07

The document has been updated to this date

and will no longer be subject to revision.

Secondary air injection function

P14.30-0247-06

60 Air pump
62 Air filter
126 Air shutoff valve
127 Check valve (injected air)
N3/4 HFM-SFI control module
Y32 Air pump switchover valve
Y33 Electromagnetic air pump clutch
a Air admission

Secondary air injection warms up the catalytic converter more rapidly to its operating temperature and thus improves the emission levels in the warming-up phase.

The air pump switchover valve (Y32) and the electromagnetic air pump clutch (60) are actuated simultaneously by the engine control module for up to 150 seconds after engine start if:

coolant temperature > 10 °C and < 60 °C

engine speed < 2000 rpm

throttle valve not fully open

secondary air injection is inhibited after actuation until the coolant temperature is greater than about + 60 °C and then drops to below 40 °C.

If the electromagnetic air pump clutch (Y33) is actuated, a positive connection exists to the belt pulley driven by the poly V-belt. The air pump (vane cell pump) is operated.

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The pump inducts air through a maintenance-free filter and pumps it to the air shutoff valve.

The air pump switchover valve switches the intake manifold pressure through to the air shutoff valve (126). The latter opens and the air supplied by the air pump is pumped into the exhaust manifold.

The injected air reacts with the hot exhaust gases in the exhaust passage. An oxidation of carbon monoxide (CO) and hydrocarbon (HC) takes place and results in an additional increase in exhaust temperature.

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Control module (HFM-SFI) position/task/design/function

GF07.51-P-4103D

Air pump
position/task/design/function

GF14.30-P-3100F

Crankshaft position sensor position/task/design/function

GF07.04-P-4116G

Coolant temperature sensor position/task/design/function

GF07.04-P-5026GA

Air shutoff valve
position/task/function

GF14.30-P-4028D

Air pump switchover valve position/task/design/function

GF14.30-P-3103F

Check valve (injected air) position/task/design/function

GF14.30-P-4029F

Electromagnetic air pump clutch
task/function

GF14.30-P-3104F

EA/CC/ISC actuator position/task/design/function

Overvoltage protection relay

Model 124, 202 up to 7/96

GF54.10-P-4100A

Base module
position/task/design/function

Model 129, 140

GF54.21-P-4013L

Fuse and relay module

Model 202 as of 8/96

Lambda control (HFM-SFI) function

GF07.51-P-3011D

Three-way catalytic converter design/function

GF49.10-P-3002F

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