1991 OPEL KADETT electric

Downloaded from www.Manualslib.com manuals search engine CONTENTS
1.0 PRODUCT DESCRIPTION
2.0 FEATURES
3.0 PRODUCT IDENTIFICATION AND APPLICATION
4.0 SPECIFICATION
4.1 Electrical
4.2 Environmental
4.3 Fuel delivery
5.0 CONNECTIONS
6.0 SPARK TIMING
6.1 Distributor bypass operation
6.2 Engine speed and crankshaft
position measurement
6.3 Engine load measurement
6.4 Advance angle look-up
6.5 Ignition firing delay calculation
6.6 Dwell time calculation
6.7 Engine water temperature measurement
7.0 FUEL INJECTION
7.1 Air mass to fuel mass ratio
7.2 Air mass measurement
7.3 Speed density concept
7.4 Fuel metering
7.5 Continuous fuel flow rate
7.6 Injector opening and closing times
7.7 Injection timing
7.8 Injection duration
7.9 Correction factors
7.9.1 Injection hardware deficiencies
7.9.2 Engine operating conditions
7.9.3 Intake air temperature
7.9.4 Engine temperature
7.9.5 Cold starting conditions
7.9.6 Post-start and warm-up conditions
7.9.7 Acceleration conditions
7.9.8 Deceleration lean-out conditions

Downloaded from www.Manualslib.com manuals search engine 4 SPECIFICATION
The following specification is applicable to DEFITA200 P/N:
A020-C ECU's unless otherwise stated:
4.1 Electrical
Operating voltage : 9 to 15 VDC continuous : 6 to 16 VDC limited functions : 24 VDC for 60 seconds maximum
Operating current : Less than 500 mA
Standby current : Less than 12 mA (>1 minute after
ignition off)
Timing accuracy : +/- 0.5 degrees
R.p.m. limit : 6,297
Reference signal : Negative edge from Distributor Y24
at 10ø BTDC
Base timing : 10ø BTDC r.p.m. < 450 or diagnostics initia- lised after starting
Mapped timing : r.p.m. > 450 and diagnostics dis-
abled
Selectable octane maps : 97 RON Factory fitted
: 93 RON
: 87 RON
: 87D RON (For fuel with octane
below 87 RON)
Selectable by interchanging octane plug on harness

Downloaded from www.Manualslib.com manuals search engine Volumetric efficiency depends mainly on the:
a) Inlet valve and camshaft design
b) Inlet manifold design
c) Engine speed
The volumetric efficiency is normally less than one (1) and
has the effect that the actual air mass entering the cylin-
der will be less than the measured value.
Peak volumetric efficiency co-insides with the engine speed
where the maximum torque is developed.
7.4 FUEL METERING
Now that a method has been established to determine the air
mass entering the engine it is possible to calculate the
quantity of fuel to be injected to achieve the required A/F
ratio. An electric fuel pump delivers fuel at a constant
pressure to the injector which is opened for the required
injection duration. The fuel pressure is regulated by a
mechanical pressure regulator.
The fuel mass to be injected is:
Fm = Am/(A/F) Where Fm = Fuel mass
Am = Air mass
Since the fuel is injected in bursts it is necessary to know
the fuel flow rate of the injector, pump and regulator
system, as well as the injector opening and closing delays
at various battery voltages to enable calculation of the
injection duration.

Downloaded from www.Manualslib.com manuals search engine The injector drive circuit allows a pull-in current of 4A
and a holding current of 1A. Once an injector current of 4A
is reached the circuit will automatically reduce it to 1A.
Injector opening and closing times vary with battery voltage
and vary between 0.2 ms at 14 volt and 1.35 ms at 6.5 volt.
The ECU takes this into account by measuring the battery
voltage before calculating the injection times.
The electrical opening duration of the injector consists of
the sum of the opening and closing delays and the true
required injection duration.
7.7 INJECTION TIMING
Under static conditions (constant engine load and speed)
fuel will be injected in synchronisation with the crankshaft
position and speed reference signal, i.e. once per intake
stroke. Fuel injection will commence 0.5 ms after the 10ø
BTDC reference.