gf0940s2100a

Charge pressure control valve position/task/design/function

Type gf · topic 09.40 · version 0102 · 1999-01-14

Applies to: ENGINE 611.980 in MODEL 638.094 /194 /294

Where it sits

Function group 1 Engine › 09 Air intake, turbocharging › 09.40 Turbocharger — Series 611 (models 980) · Series 638 (models 094, 194, 294)

GF09.40-S-2100A

Charge pressure control valve position/task/design/function

19.6.98

ENGINE 611.980 in MODEL 638.094 /194 /294

Charge pressure control valve position/task/design/function

S09.40-2503-05

Design

110/10 Charge pressure control valve vacuum unit

a Bypass flap

b Control linkage

e Control line connection

g Turbine wheel

C Exhaust gases to turbine wheel

D Exhaust outlet

E Bypass

Charge pressure control valve Position

GF09.40-S-2100-01A

Charge pressure control valve Task

Regulating the charge pressure from engine revolutions of about 2000 rpm, in line with engine load and engine speed, by opening the exhaust flap in the turbocharger.

The bypass flap remains closed up to an engine speed of about 2000 rpm (charge pressure is not adequate).

Charge pressure control valve Design

The charge pressure control valve consists of a vacuum unit, a control linkage and a bypass flap.

Charge pressure control valve Function

The charge pressure control valve is closed by the charge pressure control vacuum transducer (Y80) through the vacuum unit (110/10) and the exhaust gases are deflected as a result to the turbine wheel (g).

The bypass flap (a) is actuated by the control linkage (b). When the bypass flap is fully open, no precompression takes place; the engine operates as a naturally aspirated engine.

Referenced documents