gf3000p3014d

Idle speed control function

Tip gf · temă 30.00 · versiune 0100 · 2009-02-03

Valabil pentru: ENGINE 271.942 in MODEL 203 up to model year 2008 /AEJ 07 ENGINE 271.942 in MODEL 209

Nu este disponibil în „ro”; afișat în Engleză.

Încadrare

Grupă funcțională 1 Motor › 30 Reglare, instalaţie de reglare viteză › 30.00 Generalităţi — Seria 203 · Seria 209

Valabil și pentru motoare/cutii de viteze: 271 942

GF30.00-P-3014D

Idle speed control function

9.1.09

ENGINE 271.942 in MODEL 203 up to model year 2008 /AEJ 07

ENGINE 271.942 in MODEL 209

Idle speed control function

P07.70-2044-06

B11/4 Coolant temperature sensor

B37 Accelerator pedal sensor

L5 Crankshaft position sensor

M16/6 Throttle valve actuator

N3/10 ME-SFI [ME] control unit

N15/3 ETC control unit
(with transmission 722)

N22 AAC [KLA] control and operating unit

S40/3 Clutch pedal switch
(with transmission 716)

T1/1 Cylinder 1 ignition coil

T1/2 Cylinder 2 ignition coil

T1/3 Cylinder 3 ignition coil

T1/4 Cylinder 4 ignition coil

X11/4 Data link connector

Y10/1 Power steering pump pressure regulator valve

Y76 Fuel injectors

CAN data bus (Controller Area Network)

The ME-SFI [ME] control unit controls the idle speed in the warm-up phase and at different engine loads (e.g. drive position engaged, refrigerant compressor activated) according to the input signals.

Homogenous mode

The throttle valve actuator controls the idle speed by altering the position of the throttle valve. Actuation is by the ME-SFI [ME] control unit.

To assist the idle speed control, the ignition angle can be retarded by as much as a 20° crank angle and advanced by as much as a 20° crank angle.

Altering the ignition angle provides more rapid control than altering the position of the throttle valve.

Stratified charge mode

Idle speed is controlled by the ME-SFI [ME] control unit only by altering the fuel injection quantity.

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Warm-up (heating speed)

In order to bring the catalytic converter more rapidly to its operating temperature, the:

at coolant temperatures <40°C,

after each starting procedure,

for approx. 20 seconds

the idle speed is raised to about 1100 to 1300 rpm.

After this time elapsed, the idle speed is increased at a coolant temperature <70°C depending on the temperature for about 50 seconds by about 50 to 100 rpm.

Automatic transmission (for transmission 722)

When a drive position is engaged, a lower engine speed is controlled in order to reduce the creeping tendency of the vehicle.

The information "Drive position engaged/not engaged" is transmitted by the ETC control unit via the CAN data bus to the ME-SFI [ME] control unit.

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Mechanical manual transmission (for transmission 716)

When actuating the clutch pedal the idle speed is stabilized.

Refrigerant compressor

Before connecting the AC compressor, the AAC control and operating unit gives a signal via the CAN data bus to the motor electronics control unit to prevent a fall in the rpm at idle speed while connecting the AC compressor. This responds by adjusting the idle speed appropriately.

Power steering pump

The power steering pump pressure regulator valve regulates the hydraulic pressure of the power-assisted steering.

Changes in pressure change the engine load requires adaptation of the idle speed.

The idle speed can be influenced with the STAR DIAGNOSIS.

Fuel injectors, location/task/design/function

Y76

GF07.03-P-2103D

Crankshaft position sensor, location/task/design/function

L5

GF07.04-P-4116D

Coolant temperature sensor, location/task/design/function

B11/4

GF07.04-P-5026D

ME-SFI [ME] control unit, location/task/design/function

N3/10

GF07.61-P-5000KE

Ignition coils, location/task/design/function

T1/1-T1/4

GF15.10-P-3102KE

Clutch pedal switch, location/task/function

S40/3 With transmission 716

GF29.10-P-2100D

Accelerator pedal sensor, location/task/design/function

B37

GF30.20-P-4010KE

Throttle valve actuator, location/task/design/function

M16/6

GF30.22-P-4101KE

Power steering pump pressure regulator valve, location/task/design/function

Y10/1

GF46.30-P-2102D

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