Diluted oil regeneration in internal combustion engine
First Claim
1. A diluted oil regeneration device which regenerates an engine oil diluted with a fuel an internal combustion engine for a vehicle, the engine comprising a piston which is lubricated by the engine oil and a fuel injector which supplies the fuel to a combustion chamber formed by the piston, the device comprising:
- a mechanism which raises a temperature of the engine oil; and
a programmable controller programmed to;
determine whether or not the engine oil needs to be regenerated; and
control the mechanism to raise the temperature of the engine oil over a predetermined time period, when the engine oil needs to be regenerated.
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Accused Products
Abstract
An internal combustion engine (10) for a vehicle comprises a fuel injector (12) which supplies fuel to a combustion chamber formed in a piston (1), and an oil pan which stores engine oil below the piston (1). With regard to a phenomenon whereby the engine oil is diluted with the fuel injected by the fuel injector (12), a controller (90) determines whether or not the engine oil needs to be regenerated (S13). When the engine oil needs to be regenerated, the controller (90) switches a cooling water path in the engine (10) by controlling an electrically controlled thermostat (74), and raises the temperature of the engine oil over a predetermined time period (S15, S17). As a result of this temperature increase, the fuel in the engine oil is vaporized, thereby reducing the dilution ratio of the engine oil, and thus the engine oil is regenerated.
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Citations
12 Claims
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1. A diluted oil regeneration device which regenerates an engine oil diluted with a fuel an internal combustion engine for a vehicle, the engine comprising a piston which is lubricated by the engine oil and a fuel injector which supplies the fuel to a combustion chamber formed by the piston, the device comprising:
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a mechanism which raises a temperature of the engine oil; and
a programmable controller programmed to;
determine whether or not the engine oil needs to be regenerated; and
control the mechanism to raise the temperature of the engine oil over a predetermined time period, when the engine oil needs to be regenerated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A diluted oil regeneration device which regenerates an engine oil diluted with a fuel in an internal combustion engine for a vehicle, the engine comprising a piston which is lubricated by the engine oil and a fuel injector which supplies the fuel to a combustion chamber formed by the piston, the device comprising:
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means for raising a temperature of the engine oil;
means for determining whether or not the engine oil needs to be regenerated; and
means for controlling the raising means to raise the temperature of the engine oil over a predetermined time period, when the engine oil needs to be regenerated.
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12. A diluted oil regeneration method which regenerates an engine oil diluted with a fuel in an internal combustion engine for a vehicle, the engine comprising a piston which is lubricated by the engine oil, a fuel injector which supplies the fuel to a combustion chamber formed by the piston, and a mechanism which raises a temperature of the engine oil, the method comprising:
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determining whether or not the engine oil needs to be regenerated; and
controlling the mechanism to raise the temperature of the engine oil over a predetermined time period, when the engine oil needs to be regenerated.
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Specification