SYSTEM AND METHOD FOR QUANTIZING FUEL DILUTION OF ENGINE MOTOR OIL DUE TO POST-INJECTION FUELING TO REGENERATE AN EXHAUST AFTERTREATMENT DEVICE

• Main Authors: HUNTER GARY L, MAKARTCHOUK ANDREI
• Format: Patent
• Language: English
• Published: 22.10.2008
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

A system and a method for quantizing fuel dilution of engine motor oil due to the use of post-injection of fuel to regenerate an exhaust after treatment device are provided to create rich exhaust leaving a cylinder of the engine. A method for quantizing fuel dilution of engine motor oil due to the use of post-injection of fuel to regenerate an exhaust after treatment device comprises the step of executing an algorithm(30) in a data processing system associated with the engine. The executing of the algorithm includes calculating a quantity of post-injected fuel that is retained in a film of engine motor oil on a wall of the cylinder and using the calculated quantity of post-injected fuel that is retained in the film to quantize fuel dilution of the engine motor oil supply. The algorithm includes processing various data including data indicative of the quantity of post-injected fuel, data indicative of in-cylinder pressure, data indicative of in-cylinder temperature, and data indicative of engine speed.