Diesel injector fouling bench-test methodology. Interim report, Feb 86-Jun 92

Technical Report · Mon Jun 01 04:00:00 EDT 1992

OSTI ID:7041509

Stavinoha, L L; Yost, D M; Lestz, S J

Compared to conventional compression ignition (CI) engine operation with the fuel being delivered at approximately 149 deg C (300 deg F), adiabatic engine operation potentially may deliver the fuel at temperatures as high as 260 deg C (500 deg F). Hypergolic CI engine combustion systems now in theoretical design stages will deliver fuel at temperatures approaching 427 deg to 538 deg C (800 deg to 1000 deg F). The ability of a fuel to resist formation of deposits on internal injector system surfaces is a form of thermal oxidative stability for which test methodology will be required. The injector Fouling Bench Test (IFBT) methodology evaluated in this report will assist in defining fuel contribution to injector fouling and control of fuel thermal stability in procurement specifications. The major observations from this project have included: Forty-hour cyclic IFB tests employing both Bosch APE 113 and Detroit Diesel (DD) N70 injectors are viable procedures for evaluating fuel effects on injector fouling. Cyclic operation appears to be superior to steady-state operation for both type injectors. Eighty-hour cyclic tests are more discriminating am 40-hour cyclic tests using the Bosch APE 113 injectors. JFTOT tests of fuels provide directional information on thermal stability-related deposits and filter plugging but show limited good correlation with IFBT DD N70 ratings, and none with IFBT Bosch APE 113 injector ratings. Deposition on injector pintles was more realistically rated by optical microscopy and Scanning Electron Microscopy (SEM) than conventional visual and bench rating methods. High-sulfur fuel readily caused sticking of Detroit Diesel injectors. Injector sticking is an important mode of injector fouling.

• Research Organization: Southwest Research Inst., San Antonio, TX (United States). Belvoir Fuels and Lubricants Research Facility
• OSTI ID: 7041509
• Report Number(s): AD-A-254532/5/XAB; BFLRF--267; CNN: DAAK70-85-C-0007; DAAK70-87-C-0043
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
023000 -- Petroleum-- Properties & Composition
33 ADVANCED PROPULSION SYSTEMS
330102* -- Internal Combustion Engines-- Diesel
CHEMICAL REACTIONS
COMPRESSION
DEPOSITION
DEPOSITS
DIESEL ENGINES
DIESEL FUELS
DISTILLATES
ELECTRON MICROSCOPY
ELEMENTS
ENERGY SOURCES
ENGINES
FILTERS
FOSSIL FUELS
FOULING
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUELS
GAS OILS
HEAT ENGINES
IGNITION
INTERNAL COMBUSTION ENGINES
LIQUID FUELS
MEASURING METHODS
MICROSCOPY
NONMETALS
OPERATION
OPTICAL MICROSCOPY
OXIDATION
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PROCUREMENT
SCANNING ELECTRON MICROSCOPY
SPECIFICATIONS
STABILITY
SULFUR
SULFUR CONTENT
TEST FACILITIES