gf3035w3000ma

Function of the engine brake/constant throttle actuation

Typ gf · téma 30.35 · verze 0100 · 2006-12-22

Platí pro: ENGINE 900.9 in MODEL 970, 972, 975, 976 with BODY 972.890 ENGINE 902.9 in MODEL 950, 952, 953, 954 with BODY 940.890 ENGINE 902.9 in MODEL 970, 972, 974, 975, 976 with BODY 972.890 ENGINE 904.9 in MODEL 375.1 with BODY 375.850 ENGINE 904.9 in MODEL 958.0 with BODY 958.860 ENGINE 904.9 in MODEL 970, 972, 975, 976 with BODY 972.890 ENGINE 906.9 in MODEL 374.5 with BODY 374.860 ENGINE 906.9 in MODEL 375.3 with BODY 375.820 ENGINE 906.9 in MODEL 950, 952, 953, 954 with BODY 940.890 ENGINE 906.9 in

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

Zařazení

Funkční skupina 1 Motor › 30 Regulace, rychlostní regulace › 30.35 Řízení motoru vozidla (FMR) — Řada 374 (modely 5**, 860) · Řada 375 (modely 1**, 3**, 820, 850) · Řada 900 (modely 9**) · Řada 902 (modely 9**) · Řada 904 (modely 9**) · Řada 906 (modely 9**) · Řada 940 (modely 890) · Řada 950 · Řada 952 · Řada 953 · Řada 954 · Řada 958 (modely 0**, 2**, 860, 870) · Řada 970 · Řada 972 · Řada 974 · Řada 975 · Řada 976

Platí také pro motory/převodovky: 924 9**, 926 9**

GF30.35-W-3000MA

Function of the engine brake/constant throttle actuation

5.12.06

ENGINE 900.9 in MODEL 970, 972, 975, 976 with BODY 972.890

ENGINE 902.9 in MODEL 950, 952, 953, 954 with BODY 940.890

ENGINE 902.9 in MODEL 970, 972, 974, 975, 976 with BODY 972.890

ENGINE 904.9 in MODEL 375.1 with BODY 375.850

ENGINE 904.9 in MODEL 958.0 with BODY 958.860

ENGINE 904.9 in MODEL 970, 972, 975, 976 with BODY 972.890

ENGINE 906.9 in MODEL 374.5 with BODY 374.860

ENGINE 906.9 in MODEL 375.3 with BODY 375.820

ENGINE 906.9 in MODEL 950, 952, 953, 954 with BODY 940.890

ENGINE 906.9 in MODEL 958.0 with BODY 958.860

ENGINE 906.9 in MODEL 958.2 with BODY 958.870

ENGINE 906.9 in MODEL 970, 972, 974, 975, 976 with BODY 972.890

ENGINE 924.9 in MODEL 958.0 with BODY 958.860

ENGINE 924.9 in MODEL 970, 972, 974 with BODY 972.890

ENGINE 926.9 in MODEL 950, 952, 953, 954 with BODY 940.890

ENGINE 926.9 in MODEL 958.2 with BODY 958.870

Function of the engine brake/constant throttle actuation

W30.35-1174-81

0 Basic position

1 Engine brake stage 1

2 Engine brake stage 2

A3 Drive control (FR) control unit

A6 Engine control (MR) control unit

A20 Retarder control (RS) control unit

B1 Foot throttle actuator

CAN 1 Vehicle CAN

CAN 4 Engine CAN

S2 Engine control/permanent brake operating lever

Y1 Pneumatic constant throttle solenoid valve (4-cylinder engines)

Y2 Engine brake flap solenoid valve

Y49 Hydraulic constant throttle solenoid valve (6-cylinder engines)

General information

Actuation of the engine brake or constant throttle varies according to the engine model and vehicle equipment.

Actuation, that is activation of the respective permanent brake device, always takes place however over the engine control/permanent brake operating lever (S2), whose switch positions are detected either by the drive control (FR) control unit (A3) or the retarder control (RS) control unit (A20) depending in whether the vehicle is fitted with or without code (BA1) Performance-optimized Voith retarder or with code (BA9) Voith secondary retarder R 115.

Function sequences

Vehicles with a 4-cylinder engine

All vehicles fitted with a 4-cylinder engine are fitted with a pneumatic constant throttle and an engine brake flap.

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The switch positions of the engine control/permanent brake operating lever (S2) are always detected by the drive control (FR) control unit (A3).

1 Bringing the engine control/permanent brake operating lever (S2) from its base position (0) into the engine brake stage 1 (1) position causes the drive control (FR) control unit (A3) to actuate the solenoid valve for the pneumatic throttle valve (Y1) on condition that the engine speed exceeds 900 r.p.m. Actuation by the drive control (FR) control unit (A3) opens the pneumatic constant throttle solenoid valve (Y1) and guides compressed air to the constant throttle valve in the cylinder head.

The drive control (FR) control unit (A3) also initiates activation of the indicator lamp for the permanent brake in the instrument (INS) at the same time.

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2 Bringing the engine control/permanent brake operating lever (S2) from the engine brake stage 1 (1) position into the engine brake stage 2 (2) position also causes the drive control (FR) control unit (A3) to actuate both the solenoid valve for the pneumatic constant throttle (Y1) and the solenoid valve for the engine brake flap (Y2).

The engine brake flap solenoid valve (Y2) controls the flow of compressed air to the operating cylinder of the engine brake flap and the braking force increases.

Vehicles with a 6-cylinder engine

All vehicles fitted with a 6-cylinder engine are fitted with an hydraulic constant throttle and an engine brake flap.

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The switch positions of the engine control/permanent brake operating lever (S2) are detected for vehicles without code (BA1) Performance-optimized Voith retarder or code (BA9) Voith secondary retarder R 115 by the drive control (FR) control unit (A3) and for vehicles with an additional retarder by the retarder control (RS) control unit (A20). The latter device passes on switch positions of the engine control/permanent brake operating lever (S2) in the form of messages via the vehicle CAN bus (1) on the drive control (FR) control unit (A3).

1 Bringing the engine control/permanent brake operating lever (S2) from its base position (0) into the engine brake stage 1 (1) position causes the drive control (FR) control unit (A3) to actuate the hydraulic constant throttle solenoid valve (Y49) on condition that the engine speed is greater than
900 r.p.m.

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Here the drive control (FR) control unit (A3) sends an appropriate message via the engine CAN bus (4) to the engine control (MR) control unit (A6) which then actuates the hydraulic constant throttle solenoid valve (Y49).

The hydraulic constant throttle solenoid valve (Y49) opens a feed hole to the control line of the constant throttle valve which is then opened by the oil pressure of the engine.

The drive control (FR) control unit (A3) also initiates actuation of the indicator lamp for the permanent brake in the instrument (INS) at the same time.

2 Bringing the engine control/permanent brake operating lever (S2) from the engine brake stage 1 (1) position into the engine brake stage 2 (2) position causes the drive control (FR) control unit (A3) to also actuate the engine brake flap solenoid valve (Y2). The engine brake flap solenoid valve (Y2) controls the flow of compressed air to the operating cylinder of the engine brake flap and the braking force increases.

Hydraulic constant throttle solenoid valve, location/task/function

Engine 902.9, 906.9, 926.9

GF01.50-W-4104MA

Pneumatic constant throttle solenoid valve, location/task/function

Engine 900.9, 904.9, 924.9

GF01.50-W-4105MA

Clutch switch - location/function

Only for model 375.1, 958.0, 970, 972, 974, 975, 976 with clutch pedal

GF25.19-W-4102A

Foot throttle actuator, location/task/design/function

GF30.35-W-3101A

Drive control (FR) control unit, location/task

Model 958.0/2 without code (XV0) Global Cockpit

GF30.35-W-4103A

Model 374, 375, 950, 952, 953, 954, 970, 972, 974, 975, 976,

Model 958.0/2 with code (XV0) Global Cockpit

GF30.35-W-4103MA

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