Mazda 2006 Mazda5 Technical Information Seite 95

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2.0 MZR-CD Engine Emission System
If the exhaust gas is lea
the exhaust gas, resultin
n, the pump cell pumps oxygen out of the diffusion gap back into
g in a positive pump current. Conversely, if the exhaust gas is
gative
takes
rich, oxygen is pumped from the exhaust gas into the diffusion gap, leading to a ne
pump current. If the composition of gas in the diffusion gap is λ = 1, no pumping
place and the pump current is zero.
M5_01046
3
4
5
6
Pump voltage
Nernst cell
1 Exhaust gas flow 8 Pump cell
2 Exhaust pipe 9 Porous protective layer
Heater element 10 Gas access passage
PCM 11 Porous diffusion barrier
Reference air chamber 12 Sensor voltage
Diffusion gap
13
7
Service Training Mazda5 01-73
Seitenansicht 94
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