| CPC G01N 33/2888 (2013.01) [F01M 11/10 (2013.01); G01N 1/10 (2013.01); F01M 2011/1446 (2013.01); F01M 2250/60 (2013.01)] | 18 Claims |
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1. A system for analyzing lubricant fuel dilution of a vehicle engine on a chassis dynamometer or test bench, the system comprising:
the vehicle engine, comprising the lubricant and a fuel;
a plurality of sensors associated with the vehicle engine and in fluid communication with a positive crankcase ventilation system of the vehicle engine;
a controller in communication with the plurality of sensors;
an automatic engine lubrication sampling apparatus in communication with the controller and in fluid communication with a lubrication system of the vehicle engine, the engine lubrication sampling apparatus comprising:
a plurality of sample containers;
an automatic engine lubricant sampling system comprising an engine oil spout actuator or engine oil pressure regulator and configured to:
automatically transfer, using the oil spout actuator or pressure regulator, in response to a first signal from the controller, a first sample of the lubricant from the lubrication system into a first sample container of the plurality of sample containers; and
automatically transfer, using the oil spout actuator or pressure regulator, in response to a second signal from the controller, a second sample of the lubricant from the lubrication system into a second sample container of the plurality of sample containers,
wherein the controller is configured to:
automatically receive, from the plurality of sensors, first sensor readings over a first time period associated with the first signal and second sensor readings over a second time period associated with the second signal;
receive a first lubricant fuel dilution analysis of the first sample of the lubricant and a second lubricant fuel dilution analysis of the second sample of the lubricant; and
automatically generate a report comprising: the first lubricant fuel dilution analysis, at least one of the first sensor readings, the second lubricant fuel dilution analysis, and at least one of the second sensor readings;
automatically compute a change in the lubricant fuel dilution between the first lubricant fuel dilution analysis and the second lubricant fuel dilution analysis;
automatically classify the first sensor readings and the second sensor readings and, based on the classification, divide the first time period or the second time period into a plurality of regions; and
based on the classification, automatically assign to each region a respective fraction of the change in the lubricant fuel dilution, such that the entire change in the lubricant composition is assigned to the plurality of regions; and
for each region, automatically identify a respective at least one sensor reading most strongly correlated with the respective fraction of the change in the lubricant fuel dilution,
wherein the lubricant fuel dilution is dilution of the lubricant by the fuel of the vehicle engine.
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