Owner`s manual

MAJOR SYSTEMS AND
HOW THEY WORK
The common theme that applies to almost all
of the automotive systems described in this
section is electronic controls. Because of their
speed, precision and reliability, electronic
components are used wherever possible to
increase the efficiency and driveability of your
INFINITI.
The typical control system employs ‘‘sensors’’,
which collect information about operating
conditions and driver demand and send it,
usually in the form of an electrical voltage
signal, to an ‘‘engine control module’’, which
is a small, on-board computer. The engine
control module monitors the information pro-
vided by the sensors, calculates the optimum
or best control, and makes it happen through
signals to electrical ‘‘actuators’’ in the engine
or transmission or brake system—wherever
the control must take place. The results can
seem miraculous.
ENGINE AND DRIVE TRAIN
INFINITI VG33E Engine with
Electronic Concentrated Engine
Control System (ECCS)
SUMMARY—ECCS ENGINE
The magic of the ECCS system is that it
coordinates the functions and control of air-
fuel mixture, ignition timing, exhaust gas
recirculation, and idle speed by the operation
of a high-speed computer. The precisely
coordinated control of all of these functions
allows the engine to operate more efficiently
and emission free than would have been
possible under earlier technologies.
TECHNICAL AND CONSUMER INFORMATION
9-2
Z 96.12.20/ X