Injection After Engine Start - Suzuki F6A Service Manual

K is set to use as a remedy if the engine should have failed to start and an ignition plug converage have occurred. Also,
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when the cooling water temperature is low, the injection time at start is divided for effective spraying to ensure better
start. (Divided injection)
Criteria for execution of divided injection: When cooling water temperature is low.
Number of division= Injection time at engine start + constant time

(2) Injection after engine start

The injection time after engine start is calculated by using the following equation.
Injection time after engine start= Basic injection time
Given below is explanation of each term.
(1) Basic injection time
The basic injection time is calculated by using the amount of intake air metered by the air flow meter and the
engine speed given by the crank angle sensor in the following equation.
Basic injection time= K x Amount of intake air
(2) 2 Inclusive compensation factor
This compensation factor is used to compensate the basic injection time to obtain an optimum air/fuel ratio for
each engine condition whether the engine is cold, during acceleration or otherwise. It is obtained by adding and
multiplying various compensation factors which are calculated by using signals from sensors.
Inclusive compensation factor= Intake air temperature compensation factor (if available)
compensation factor + engine warm–up increase compensation + acceleration increase
compensation factor)
But the voltage compensation time is not used for compensation of the basic injection time but it is added indepen-
dently. Here each compensation factor is described.
HIGH TEMP
LOW TEMP
PASSED TIME AFTER STARTING
inclusive compensation factor
x
Engine speed
After start increase compensation
This increase compensation is executed immediately
after the engine start according to the cooling water tem-
perature at the engine start so that the engine speed is
stabilized. The initial value of the compensation factor is
larger when the cooling water temperature at the engine
start, this value reduces quickly to "0". When this
increase compensation is used, the air/fuel ratio is richer
than its optium value.
(after start increase
x
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