SYSTEM AND METHOD FOR INDICATING QUALITY OF MOTOR OIL IN A VEHICLE WHOSE ENGINE HAS AN EXHAUST AFTERTREATMENT DEVICE THAT REQUIRES OCCASIONAL REGENERATION
First Claim
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1. A method for estimating lubricating quality of motor oil in an internal combustion engine that propels a vehicle and has an exhaust system containing an aftertreatment device that is occasionally regenerated, the method comprising:
- in a data processing system associated with the engine, processing various data to develop a data estimate of the lubricating quality of motor oil currently in the engine, including processing data to identify occurrence of an active regeneration event, processing data that is indicative of an amount of degradation in lubricating quality of motor oil in the engine due to the identified occurrence of the forced regeneration event to develop a data estimate of the amount of degradation in lubricating quality of motor oil in the engine due to the event, and processing the data estimate of the amount of degradation in lubricating quality of motor oil in the engine due to the identified occurrence in a calculation of the data estimate of the quality of motor oil currently in the engine.
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Abstract
A system and method for including the effect of regeneration of a diesel particulate filter (22) on quality of engine motor oil.
18 Citations
16 Claims
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1. A method for estimating lubricating quality of motor oil in an internal combustion engine that propels a vehicle and has an exhaust system containing an aftertreatment device that is occasionally regenerated, the method comprising:
in a data processing system associated with the engine, processing various data to develop a data estimate of the lubricating quality of motor oil currently in the engine, including processing data to identify occurrence of an active regeneration event, processing data that is indicative of an amount of degradation in lubricating quality of motor oil in the engine due to the identified occurrence of the forced regeneration event to develop a data estimate of the amount of degradation in lubricating quality of motor oil in the engine due to the event, and processing the data estimate of the amount of degradation in lubricating quality of motor oil in the engine due to the identified occurrence in a calculation of the data estimate of the quality of motor oil currently in the engine. - View Dependent Claims (2, 3, 4)
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5. A method for estimating degradation in lubricating quality of motor oil in an internal combustion engine that propels a motor vehicle due to occasional forced regeneration of an aftertreatment device in an exhaust system of the engine, the method comprising:
in a data processing system associated with the engine, processing data that identifies each occurrence of an active regeneration event that has occurred over a span of time during which the vehicle has been in use without any fresh motor oil being introduced into the engine, processing data that is indicative of degradation in lubricating quality of motor oil in the engine due to each identified occurrence of an active regeneration event to develop a data estimate of the amount of degradation due to each event, and accumulating the individual data estimates in a calculation of a data estimate of the amount of degradation that has occurred over the span of time during which the vehicle has been in use without any fresh motor oil being introduced into the engine. - View Dependent Claims (6)
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7. A motor vehicle comprising:
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an internal combustion engine for propelling the vehicle; a lubrication system for circulating motor oil to lubricate moving internal parts of the engine an exhaust system through which exhaust passes from combustion chambers of the engine into surrounding atmosphere; an aftertreatment device for treating exhaust passing through the exhaust system before the exhaust enters the atmosphere; an engine control system for processing various data to control various aspects of engine operation including a) occasionally forcing regeneration of the aftertreatment device to remove at least some material whose unchecked accumulation in the device would otherwise impair effectiveness of the device, and b) developing a data estimate of the lubricating quality of motor oil currently in the engine, including processing data to identify occurrence of an active regeneration event, processing data that is indicative of an amount of degradation in lubricating quality of motor oil in the engine due to the identified occurrence of the forced regeneration event to develop a data estimate of the amount of degradation in lubricating quality of motor oil in the engine due to the identified occurrence, and processing the data estimate of the amount of degradation in lubricating quality of motor oil in the engine due to the identified occurrence to develop the data estimate of the quality of motor oil currently in the engine. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A motor vehicle comprising:
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an internal combustion engine for propelling the vehicle; a lubrication system for circulating motor oil to lubricate moving internal parts of the engine an exhaust system through which exhaust passes from combustion chambers of the engine into surrounding atmosphere; an aftertreatment device for treating exhaust passing through the exhaust system before the exhaust enters the atmosphere; an engine control system for processing various data to control various aspects of engine operation including a) occasionally causing forcing regeneration of the aftertreatment device to remove at least some material whose unchecked accumulation in the device would impair effectiveness of the device, and b) processing data that identifies each occurrence of an active regeneration event that has occurred over a span of time during which the vehicle has been in use without any fresh motor oil being introduced into the engine, processing data that is indicative of degradation in lubricating quality of motor oil in the engine due to each identified occurrence of an active regeneration event to develop a data estimate of the amount of degradation due to each identified occurrence of an active regeneration event, and accumulating the individual data estimates to develop a data estimate of the amount of degradation that has occurred over the span of time during which the vehicle has been in use without any fresh motor oil being introduced into the engine. - View Dependent Claims (14, 15, 16)
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Specification