KMS 06.001-1, Руководство пользователя

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KMS MA-5 manual
Version 5.1 22
3.4.1.4 Start-up
When the engine is started, a certain quantity of extra
fuel (in most cases dependent on the coolant
temperature) will have to be injected to ensure proper
firing of the engine. There is a possibility of giving a
start-up injection impulse and start-up enrichment. The
start-up injection impulse is given once, at the moment
the first crankshaft signal is registered.
After the start-up injection impulse, the injection
periods shown in the injection graph will be adhered to.
As long as the engine speed is lower than 500 rpm, the
quantity of injected fuel shown in the first row applies.
Proper firing of the engine often requires more fuel
(depending on coolant temperature) than the quantity
needed when the engine is already running at the same engine speed. This extra enrichment can be
entered in the table for the duration of a certain amount of crankshaft rotations. There are four coolant
temperature ranges for which an enrichment table can be completed. The additional enrichment (%) in
the table can be set during the input of the rpm range. An enrichment map and a startup-pulse can be
filled in for four coolant temperature ranges. Above the highest temperature the normal startup pulse
will be used.
3.4.1.5 Throttle pump effect
When the throttle valve is opened, the engine will draw
in more air and therefore need more fuel to keep the
mix ratio at a constant level. As air is a gaseous
substance, it will reach the inlet valve earlier than the
liquid fuel, which because of its higher inertia needs
more time to accelerate. As a result, there will briefly
be a weak mix, causing the engine to 'hesitate'. The
faster the throttle valve is opened, the greater this
effect will be. To neutralise the effect of fuel having a
higher inertia than air, acceleration enrichment can be
applied. This means that, depending on the throttle
valve opening speed, extra fuel is injected. This
prevents the formation of a poor mixture.
There are two types of acceleration enrichment (these
can be se
t on/off separately). We recommend to use ‘Type 2’ acceleration enrichment.
Type 1:
The quantity of extra fuel to be injected can be set for
the three engine speed ranges indicated. The duration
of enrichment can be set by entering the number of
crankshaft rotations. The acceleration enrichment will automatically decrease at lower throttle valve
opening speeds. Acceleration enrichment type 1 is always linked to
‘Engine load 1’.