RC EVOLUTION - 遙控工房 - 香港RC遙控車討論區

標題: 引擎終於撻著了, 但問題接二連三!!! [打印本頁]

作者: bigben 時間: 2007-7-10 10:24
標題: 引擎終於撻著了, 但問題接二連三!!!
Inferno US Sports 引擎終於撻著了

, 但問題接二連三!!! 情如如下:

之前試咗十九幾次失敗(三天時間)

……. 終於….

1)
先把油門servo拉開至一半(冇開控), 其後引擎成功撻著(三十份一成功機會率

), 由於油門開至一半, 引擎高速轉動….. 於是乎我把油門servo set 返回中位置….. 引擎減速…. 但我見我轉速雖回落但偏高, 於是我把怠速螺絲 anticlockwise扭, 希望將怠速減慢…… 但好快又死火了 (可能扭得太多)
2)
其後中間試完又試, 引擎又撻著了(又是二十份一成功機會率

), 今次怠速ok, 聲音係”du du du du du”….. keep check 住温度由40->50-> 60…..80…. 轉速又開始加快!!!…….. 我confirm油門已關至minimum了, 但引擎繼續加快!! 温度直上100!! 輪子快速轉動!!! 因怕温度太高, cut 油!! (以上”撻著至cut 油”約維持1分鍾)
3)
其後中間試完又試, 引擎又撻著了(又是二十份一成功機會率

), 今次怠速ok, 聲音係”du du du du du”….. keep check 住温度由40->50-> 60…..80…. 轉速又開始加快!!!…….. 可怕的是油門servo卻被推開!! 引擎繼續加快!! 我把servo油門推至回中位置, 但servo又被推開!!! Terrible!!! 温度直上110!! 輪子快速轉動!!! 因怕温度太高, cut 油!! (以上”撻著至cut 油”約維持1分鍾)
4)
太累了!! 放棄!! (time : 0130 hours, 10 July 07)

大師兄, 中師兄們……. 有冇d嘜可以教吓我呀?? 我只想run-in引擎啫…. Why so difficult

???

1) Why引擎不停加快?? 而唔係keep住”du du du du du”咁轉

???
2) Need to open the 搖控 when break in ???
3) Any other suggestion??

pls help me..... I am exhausted.... (start to hate engine

!!!)

如果有run-in engine 賣就好啦……. 貴d都願…..

[ 本帖最後由 bigben 於 2007-7-10 10:28 編輯 ]

作者: BHP 時間: 2007-7-10 10:31
I can run it in for you~

If your throttle was already reduced to neutral position,
there are only 2 causes.

1. Idle set too high
2. Low needle set too lean

Don't worry if the low needle is too rich.
For the first 2 tanks,
personally I would make the low needle running 1 turn richer,
and idle screw maybe .5 to .75 turns more clockwise than the "usual" setting.

The idea is to start it, running at a slightly rich setting (low needle setting),
and preventing the engine from stalling (idle screw).

Whether to have the radio on or not, it's just personal preference.
For me, I use the heat cycle method to break in my engines,
so I do run/play the car while running in.

Hope this helps =)

********** Edit ***********

I do worry about your point in question #1,
"Why引擎不停加快?? "
There may be a potential air leak, leading to a lean fuel mixture.
Anyways, start from a much richer fuel mixture first and work your way from there ; )

[ 本帖最後由 BHP 於 2007-7-10 10:45 編輯 ]

作者: BHP 時間: 2007-7-10 10:51
A few websites for your easy reference,
"click me" below:

Engine tuning 1
Engine tuning guide 2
Engine troubleshooting

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