Compensation Of Injection Time (Volume); Injection Stop Control - Suzuki GSX-R1000 Service Manual

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1A-2 Engine General Information and Diagnosis:

Compensation of Injection Time (Volume)

The following different signals are output from the respective sensors for compensation of the fuel injection time
(volume).
Signal
ATMOSPHERIC PRESSURE SENSOR SIGNAL
ENGINE COOLANT TEMPERATURE SENSOR
SIGNAL
INTAKE AIR TEMPERATURE SENSOR SIGNAL
HEATED OXYGEN SENSOR SIGNAL
BATTERY VOLTAGE SIGNAL
ENGINE RPM SIGNAL
STARTING SIGNAL
ACCELERATION SIGNAL/DECELERATION
SIGNAL

Injection Stop Control

Signal
TIP-OVER SENSOR SIGNAL (FUEL SHUT-OFF)
OVER-REV. LIMITER SIGNAL
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When atmospheric pressure is low, the sensor sends the signal to
the ECM and reduce the injection time (volume).
When engine coolant temperature is low, injection time (volume)
is increased.
When intake air temperature is low, injection time (volume) is
increased.
Air/fuel ratio is compensated to the theoretical ratio from density
of oxygen in exhaust gas. The compensation occurs in such a
way that more fuel is supplied if detected air/fuel ratio is lean and
less fuel is supplied if it is rich.
ECM operates on the battery voltage and at the same time, it
monitors the voltage signal for compensation of the fuel injection
time (volume). A longer injection time is needed to adjust injection
volume in the case of low voltage.
At high speed, the injection time (volume) is increased. This is the
compensation of the SRAD.
When starting engine, additional fuel is injected during cranking
engine.
During acceleration, the fuel injection time (volume) is increased,
in accordance with the throttle opening speed and engine rpm.
During deceleration, the fuel injection time (volume) is decreased.
When the motorcycle tips over, the tip-over sensor sends a signal
to the ECM. Then, this signal cuts OFF current supplied to the fuel
pump, fuel injectors and ignition coils.
The fuel injectors stop operation when engine rpm reaches rev.
limit rpm.
The fuel cut-off circuit is incorporated in this ECM in order to
prevent over-running of engine. When engine speed reaches 13
500 r/min, this circuit cuts off fuel at the fuel injectors. But under no
load, the clutch lever is pulled or the gear position is in neutral, this
circuit cuts off fuel when engine speed reaches 13 100 r/min.
CAUTION
!
Under no load, the engine can run over 13 100 r/min
through the fuel cut-off circuit is effective, which may
possibly cause engine damage. Do not run the engine
without load over 13 100 r/min at anytime.
Descriptions
Descriptions