In this chapter we introduce the wide product diversifi- of the T2 test)
cation of diesel fuel injection equipment manufactured Skills areas related to the fuel system, and that you
by Robert Bosch Corporation. Bosch produces both me- need to acquire, are listed by ASE number.
chanical and electronic fuel systems and provides ap- 1. Verify the complaint, and road/ dyno test ve-
proximately 60% of the fuel injection systems to the hide; review driver/customer interview and
global diesel engine market OEMs. A major manufac- past maintenance records/ documents; deter-
turer of pump-line-nozzle (PLN) systems with electronic mine further diagnosis.
diesel controls (EDCs), radial distributor pu~ps with 2. Inspect the engine and compartment for
EDC, electronic unit pum~s (EUPs), electronic unit In- signs of liquid leaks-oil, coolant, fuel-and
Jectors (EUls), common-rail fuel systems (CRFS), me- determine needed repairs.
chanical and electronic injectors/nozzles, their product 3 I t· tm t .. h
offerings are employed by many of the major diesel en- t I d I k d t .'
glne s. d d .
ata an In ormation ereln escn es ot me-
chanical and electronic fuel systems (transfer pumps, in- 4. Li~ten and determine engine noises that
jection pumps, nozzles, and governors). We also de- mIght be due to ~h~ fuel. s~stem: pump, noz-
scribe pump-to-engine timing, servicing/adjustment of zles, governor, mIsfire, mr-m-the-fuel system,
pumps on a test stand, diagnosis, troubleshooting, and and so on.
repair/replacement of various fuel system components. 5. Check engine exhaust smoke color /
End-of-chapter questions will permit you to review odor / density; determine necessary repairs.
the knowledge gained, and in conjunction with per- 6. Perform fuel system test/ diagnosis, fuel con-
formance of the ASE hands-on tasks, you should be pre- tamination, consumption, and so on.
488