Engine
Fuel system
16v
Marea- Marea Weekend 0
99 range
10.
In particular, the signals are made up as follows.
There are sixty teeth on the flywheel, two of which have been removed to create a space: the angle be-
tween two consecutive teeth is therefore 6 degrees:
The point of synchronism is recognized at the end of the first tooth following the two missing teeth: the
flywheel is fitted so that as this tooth passes the pair of cylinders 1 -4 is 17 teeth before TDC.
1. Engine rpm and TDC sensor
2. Gap
3. Flywheel 60-2 teeth
4. Signal corresponding to the two missing
teeth
5. Flywheel signal (engine rpm sensor)
MANAGEMENT OF THE INJECTION
The injection management strategies are designed to provide the engine with the correct quantity of fuel
and at the correct time according to the engine operating conditions.
The management of the injection basically consists of calculating the injection time, determining the injec-
tion timing and then implementing it by operating the injector.
The "basic" injection time is calculated by means of mathematical interpolation of the speed/load maps:
the experimentally obtained values contained in the maps also depend on the specifications of the injector.
The "final" injection time is determined through a calculation algorhythm in which the "basic" time is cor-
rected by a series of coefficients which take into account the different engine operating conditions which
are highlighted by the various sensors in the system.
6
Print n° 506.763/14
Summary of Contents for 1998 Marea Weekend
Page 10: ......
Page 83: ......
Page 90: ......
Page 95: ......
Page 133: ...f c...
Page 298: ...Engine Fuel system Marea Marea Weekend ft 99 update 3N30GJ01 3N30GJ02 28 Print n 506 763 15...
Page 342: ...Marea Marea Weekend 99 range Engine Fuel system Copyright by Fiat Auto 17...
Page 391: ......
Page 398: ...Engine Fuel system Marea Marea Weekend 99 range 6 Print n 506 763 14...
Page 420: ......
Page 452: ......
Page 470: ...I...
Page 499: ......
Page 501: ......
Page 580: ......
Page 656: ......
Page 788: ......