Haltech F10 Bedienungsanleitung PDF herunterladen (Seite 72)

Target Idle RPM

Target Idle RPM + Cold Idle-Up RPM

Target Idle RPM + Cold Idle-Up RPM + Start RPM

Engine Cold

Engine Warm

20sec

5-10 mins

RPM

Time

Number of Steps

This field controls the number of steps that the idle control will operate over. If you

have a stepper motor that uses say 150 steps, you can either elect to operate the stepper

motor over its entire range of steps by setting the value equal to the max number of

step s the motor will do which is 150 in this case, or you can restrict the number of

steps it can move through by making this field lower than 150. By restricting the

number of steps y ou can change the time response of the Idle Control but can also

affect the ability of the Idle Control to maintain control of the engine. This is because

in extreme circu mstances the Idle Control may wish to move the stepp er motor

through a large number of turns, but the Number of Steps on the stepper motor may

restrict the number of turns the motor can physically be permitted to move through,

thus reducing the Idle Control’s ability to control the engine as it desires.

It is best to start with a smaller value around 100 and increase it until the stepper motor

demonstrates that it is cap able of bringing the en gin e to the target idle RPM . If the value is

too low, the stepp er motor will not op en enough to maintain a consistent idle, or if it is too

high, the stepp er motor may actually miss p ulses that are sent to it and therefore it will not

operate correctly .

Cold Temperature Limit

This is the temperature below which the engine is defined as being cold, and thus the

Cold Idle-Up and Cold Opening Steps would apply.

Cold Min Position

When the engin e is co ld, y ou can sp ecify the minimum position the stepp er motor will

return to. This is useful in some applications where valves besides the Idle Air Control

M otor can switch extra air flow into the engine that would otherwise confuse the Idle

Control into thinking the engine is behaving in a way which it is not. Start with a large

value around 80-90%% and reduce the value as you go. The idea is to move it down

until the engine is idlin g at such a p oint where it is close to the target rp m. The target

RPM is used to hold the idle once control of the engine has been established. Cold

M in Position is used to restrict the p osition of the controlling valve so when the Idle

Control wishes to regain control of the engine and bring it down to the target RPM it

actually will be able to. If the values y ou are using are around 80-90%, the Idle

Control will p robably not be able to regain control of the engin e and accur ately bring

it down to the target idle RPM . This is why y ou must start with a large value for Cold

Min Position and reduce it until the engine is idling happily at the target RPM.

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Haltech F10 Bedienungsanleitung Seite 72

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