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6-2 Diagnosis Method of injected-fuel-quantity Measurement
Test judgment of Low pressure mode (250~350 bar)
1.5
5
Test judgment of high pressure mode (800~1000 bar)
10
4
Cylinder Pressure Test Method
17
Test and Judgment :
Low Mode (250~350bar),the result of test & high pressure mode (800~1000bar)
Test and Judgment
At the engine on , if 2
Target
If the injector is a brand new injector or a standard injector, it should be a standard.
5 scale
Target injection scale : Low mode = 5 scales, High mode = 8 scales
Judgment and service limitation
6
0
Low pressure test : above 1.5 scales is normal condition
(In case of standard injector is on 5 scales )
Low pressure test : above 4 scales is normal condition
(In case of standard injector is on 8 scales )
Warning :
- The injected-fuel-quantity is very important, because a injector has a good condition
Target
as closed to injected-fuel-quantity of standard injector.
8 scale
- It can be possible to estimate life time of the injector with the injected-fuel-quantity.
It doesn't matter with service limitation . Strong standard measurement is good to
judgment, but it will be increased cost. Recommending to consider the vehicle's
3
11
condition and model year.
- If injected-fuel-quantity is over 30% compare with the normal condition and new
injector, is a faulty injector. (Over injected-fuel-quantity)
1. Need to use dummy injector to prevent oil leaking at the compression and pressure test.
2. Before attach the dummy, need to check injector combined space.
3. Standard pressure is 17~30㎏/㎠
(Possible to have a difference, according to the performance of Diesel Vehicle or old vehicle)
PIEZO & BOSCH Injector Adapter
nd
injector reached target quantity out of 4 injectors, stop the E/G
Standard : 1,600cc (200rpm) 22.0 ㎏/㎠
Minimum : 17.0 ㎏/㎠
Standard : 2.000cc (260rpm) 26.0 ㎏/㎠
Minimum : 20.0 ㎏/㎠
Standard : 2.200cc (200rpm) 21.0 ㎏/㎠
Minimum : 18.0 ㎏/㎠
Standard : 3.000cc (350rpm) 30.0 ㎏/㎠
Minimum : 25.0 ㎏/㎠
Note : Please refer to the workshop manual.
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