charging AUDI S4 1998 B5 / 1.G Engine Manual

AUDI S4 1998 B5 / 1.G Engine Manual S4 1998 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/838/w960_838-0.png AUDI S4 1998 B5 / 1.G Engine Manual

Page 3 of 72

AUDI S4 1998 B5 / 1.G Engine Manual  
3 
This Self-study Programme provides you with information 
regarding design and function.  
The Self-study Programme is not a Workshop Manual!   
Please refer to the Service Literature for all the

Page 8 of 72

AUDI S4 1998 B5 / 1.G Engine Manual  
8 
Engine 
The variable valve timing 
The camshaft timing has been modified 
compared to the 2.8-litre V6 engine to meet the 
demands of turbocharging technology.
Variable valve timing with an adju

Page 22 of 72

AUDI S4 1998 B5 / 1.G Engine Manual  
23 
SSP 198/32
 
Charging 
Two  
water-cooled exhaust gas turbochargers 
with wastegate are used for charging.
The charge pressure of both exhaust gas 
turbochargers is controlled via the common 
ch

Page 25 of 72

AUDI S4 1998 B5 / 1.G Engine Manual  
26 
SSP 198/08
 
Engine  
Charge pressure control 
The air mass required to develop a specific 
level of torque is determined by means of an air 
mass calculation and produced by controlling 
the c

Page 33 of 72

AUDI S4 1998 B5 / 1.G Engine Manual  
34 
Subsystems of the Motronic 
In comparison with previously known 
systems, the ME 7.1 is not confined to the 
output of torque variables to the networked 
control units (ABS, automatic gearbox),

Page 34 of 72

AUDI S4 1998 B5 / 1.G Engine Manual  
35 
The control variable calculation is subdivided 
into two paths
Path 1 
The charging path regulates the control 
variables which influence charging: 
• Throttle valve angle
• Charge pressure