gf0751p3011d

HFM lambda control, function

Typ gf · téma 07.51 · verze 0109 · 2009-01-28

Platí pro: ENGINE 104.942 /945 /992, 111.960 /961 /970 /977 with CODE (620) Vehicles with catalytic converters ENGINE 104.995, 104.941 up to 31.7.96 except CODE (498) as of model year 1997 Japan version except CODE (491) as of model year 1997 USA version with CODE (620) Vehicles with catalytic converters ENGINE 111.974 except CODE (491) as of model year 1997 USA version with CODE (620) Vehicles with catalytic converters ENGINE 104.943 /944 /991 /994, 111.944 /975 up to 31.7.96 with CODE (620) Vehicles with cat

Není k dispozici v jazyce „cs“; zobrazeno v jazyce Angličtina.

Zařazení

Funkční skupina 1 Motor › 07 Příprava směsi › 07.51 Systém vstřikování paliva a zapalování zážehového motoru HFM — Řada 202 (modely 020, 080) · Řada 208 (modely 335)

Platí také pro motory/převodovky: 104 941, 104 942, 104 943, 104 944, 104 945, 104 991, 104 992, 104 994, 104 995, 111 921, 111 942, 111 944, 111 945, 111 946, 111 960, 111 961, 111 970, 111 974, 111 975, 111 977

GF07.51-P-3011D

HFM lambda control, function

8.1.09

ENGINE 104.942 /945 /992, 111.960 /961 /970 /977 with CODE (620) Vehicles with catalytic converters

ENGINE 104.995,
104.941 up to 31.7.96
except CODE (498) as of model year 1997 Japan version
except CODE (491) as of model year 1997 USA version
with CODE (620) Vehicles with catalytic converters

ENGINE 111.974
except CODE (491) as of model year 1997 USA version
with CODE (620) Vehicles with catalytic converters

ENGINE 104.943 /944 /991 /994, 111.944 /975 up to 31.7.96 with CODE (620) Vehicles with catalytic converters

ENGINE 111.946 up to 31.5.98 with CODE (620) Vehicles with catalytic converters

ENGINE 111.945 up to 31.5.98 in MODEL 208.335 with CODE (620) Vehicles with catalytic converters

ENGINE 111.921 /942 up to 31.8.98 with CODE (620) Vehicles with catalytic converters

ENGINE 111.945 up to 31.8.98 in MODEL 202.020 /080 with CODE (620) Vehicles with catalytic converters

HFM lambda control, function

P07.51-0510-05

B2/5 Hot film mass air flow sensor

B11/3 Coolant temperature sensor

B11/4 Coolant temperature sensor

G3/2 O2 sensor

L5 Crankshaft position sensor

M16/6 Idle speed control actuator (LLR)

N3/4 HFM-SFI [HFM] control unit

Y62 Fuel injection valves

158 Catalytic converter

The mixture composition should remain within limits as close as possible to λ = 1 in order to achieve a high conversion of the exhaust gases in the catalytic converter.

The O2 reacts to the oxygen share in the exhaust and transmits a corresponding voltage signal to the

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engine control unit for injection which causes the mixture composition to be altered in such a way that a mixture composition of λ = 1 exists for lambda control in all operating conditions. This procedure is constantly repeated (control loop), with the cycle rate depending on engine load and speed.

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The lambda closed-loop control is operational in the following operating conditions (closed-loop control):

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Coolant temperature > 60°C (HFM)

O2 sensors have reached operating temperature

Idle/partial load

Deceleration fuel shutoff not active.

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HFM lambda control, function

Engine control unit:
fuel air mixture "ENRICH"

P49.10-0306-01

Injection time extended

Air/fuel mixture

mixture

Oxygen concentration in exhaust

Small

Engine control unit:
fuel air mixture

"ENLEAN"

O2 sensor voltage,

voltage jump

at λ = 1

O2 sensor voltage rises

Oxygen concentration in exhaust
high

Air/fuel mixture

"LEAN"

Injection time reduced

O2 sensor voltage drops

O2 sensor voltage,

voltage jump

at λ = 1

A Exhaust conversion rate

B Control range around
λ = 1 (catalytic converter window)

HFM-SFI control unit location/task/design/function

GF07.51-P-4103D

O2 sensors upstream of catalytic converter, location/task/design/function

GF07.04-P-4103F

O2 sensor heater, function

GF07.61-P-3025F

Coolant temperature sensor, location/task/design/function

Engine 104/111 (B11/3)

GF07.04-P-5026GA

Engine 104/111 (B11/4)

GF07.04-P-5026G

Hot film mass air flow sensor, location/task/design/function

Round connector with bayonet lock

GF07.07-P-4118E

5-pin connection, intake air temperature sensor integrated

GF07.07-P-4118G

Self-adjustment of mixture formation, function

GF07.10-P-1029F

Fuel injection valve, location/task/design/function

GF07.03-P-5004F

Two-sensor control function

GF07.61-P-3020F

Three-way catalytic converter, design/function

GF49.10-P-3002F

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