Volvo TSI, Manual

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Group 28 Design and Function
Design and Function
Vehicle Management System
Strategy
The vehicle management system is designed to incorpo-
rate the entire vehicle system and instantly receive
real-time data from key vehicle components.
•
Uniform interfaces between the control systems.
•
Standard adaptations to the vehicle’s functions.
•
Stand-alone diagnostics for the vehicle’s main elec-
tronic components.
Vehicle
⇔
Production
Communication
Equipment
Transmission
⇔
Owner
SRS
Brakes
⇔
Driver
Engine
Instrument Cluster
⇔
Body Builder
Expansion capability
⇔
Service
Conventional Control Systems
In principle, a conventional control system is constructed
so that one or several of the vehicle’s components have
their own control units that receive signals from different
sensors. Each control unit serves its own component and
sends signals to other control units via electrical wires.
An example of this is the engine control unit that re-
ceives signals from different sensors on the engine, as
well as from other control units on the vehicle. The ac-
celerator pedal position, the clutch pedal position, the
speed signal, engaged power take-off etc., are sent to
the engine electronic control unit (EECU) via wires from
different sensors and contacts.
The system must have one or more communication
ports, to which tools can be connected for programming
as well as for reading information and any fault codes.
In the future, the vehicle’s sub-components will require
several specific control units and the vehicle electronics
will therefore become even more complex. In the long
run this will limit the ability of conventional control sys-
tems to fulfill their tasks.
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