US 6,981,485 B1
Fuel quantity modulation in pilot ignited engines
Andrew May, Wauwatosa, Wis. (US)
Assigned to Dresser, Inc., Addison, Tex. (US)
Filed on Aug. 16, 2004, as Appl. No. 10/919,419.
Int. Cl. F02B 3/00 (2006.01); F02M 21/02 (2006.01); F02M 43/00 (2006.01)
U.S. Cl. 123—299 44 Claims
OG exemplary drawing
 
1. An engine system comprising:
an internal combustion engine;
a first fuel regulator adapted to control an amount of a first fuel supplied to the engine;
a second fuel regulator adapted to control an amount of a second fuel supplied to the engine concurrently with the first fuel being supplied to the engine; and
a controller coupled to the second fuel regulator and adapted to signal the second fuel regulator during steady state engine operation to adjust the amount of the second fuel supplied to the engine in a relationship to the amount of the first fuel supplied to the engine to operate in igniting the first fuel at a specified time and adapted to signal the second fuel regulator during transient engine operation to adjust the amount of the second fuel supplied to the engine in manner different from the relationship at steady state engine operation.