Page 299 - Mechanic Diesel - TT
P. 299
MECHANIC DIESEL - CITS
It is part of fuel supply testing. In these test are identify, which injector are supply un proper fuel in cylinder. In
these system injector are test by Picoscope.
Injector back-leakage is seen as a pulsation when viewed using a PicoScope. The pulsation is formed as a result
of each injection event as follows: High-pressure diesel generated by the high-pressure diesel pump is fed directly
to the common rail and into the injector assemblies.
Exhaust analysis
Exhaust analysis is conducted to check the engine emission’s level, which are regulated by many countries. This
test analyzing the gases emitted by the engine, such as carbon monoxide, nitrogen oxides, hydrocarbons etc.
Vacuum test
• Cranking vacuum test
• Idle vacuum test
• Low and steady vacuum
• Fluctuating vacuum
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CITS : Automotive - Mechanic Diesel - Lesson 87
