Pumps – Processes
Reexamination Certificate
2006-01-17
2006-01-17
Freay, Charles G. (Department: 3746)
Pumps
Processes
C417S044100, C417S280000, C123S456000, C073S114220
Reexamination Certificate
active
06986646
ABSTRACT:
Electronically controlled variable delivery pumps produce output based upon a control signal generated by an electronic control module. The electronic control module includes programming that acknowledges that each pump may have performance characteristics that deviate from a hypothetical nominal pump. Actual pump performance characteristics are then programmed into the electronic control module so that pump control signals are customized or electronically trimmed to suit the performance characteristics of that individual pump. The performance characteristics of the individual pump are gained through testing. The electronic pump trimming strategy of the present invention is particularly applicable to hydraulic systems, such as fuel injection systems, used in internal combustion engines.
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Bernd Mahr, Manfred Dürnholz, Wilhelm Polach, and Hermann Grieshaber, Robert Bosch GmbH, Heavy Duty Diesel Engines—The Potential of Injection Rate Shaping for Optimizing Emissions and Fuel Consumption Stuttgart, Germany, at the 21st International Engine Symposium, May 4-5, 2000, Vienna, Austria.
Bettenhausen Craig A.
Mitzelfelt, Jr. Larry R.
Nelson Bryan E.
Caterpillar Inc.
Freay Charles G.
Liell & McNeil
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