Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2006-04-11
2006-04-11
Gimie, Mahmoud (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S478000
Reexamination Certificate
active
07025047
ABSTRACT:
It is known that performance of actual fuel injectors tends to deviate from performance of a nominal injector as a function of rail pressure and on-time, due to such factors as machining tolerances of fuel injector components. In addition, performance characteristics of fuel injectors tend to change after they have been broken in. These changes can lead to unexpected inconsistencies with other engine components. For example, for those engines which utilize smoke limiting maps, when the injectors are not performing as expected, the injection adjustments that result from use of the smoke limiting maps can sometimes become fruitless. Therefore, the present invention includes two in-chassis strategies for evaluating fuel injector performance, including a bare acceleration test and a loaded fuel injector performance test.
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Leman Scott A.
Rodier William J.
Shinogle Ronald
Caterpillar Inc.
Gimie Mahmoud
Liell & McNeil
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