Oil supply system in an internal combustion engine for a vehicle
First Claim
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1. A system for supplying a lubrication oil in an internal combustion engine, comprising:
- an oil pan mounted to the bottom of the internal combustion engine and storing an amount of lubrication oil therein;
first sensor means for detecting a level of oil stored in the oil pan;
second sensor means for detecting temperature parameters of the internal combustion engine;
means for storing the value of a temperature detected by the second sensor means when operation of the engine is terminated, said storing means storing the temperature until operation of the engine is resumed;
means for determining a recovered state of the oil in the oil pan, based on the difference between the temperature stored in the storing means and a temperature as detected by the second sensor means when the engine is started and a correlation between the temperature difference and an amount of oil recovered in the oil pan; and
oil supplementing means for supplementing oil in the oil pan when the oil level in the oil pan sensed by the first sensor means is lower than a predetermined value, after the oil in the oil pan has been fully recovered, as determined by the determining means.
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Abstract
An oil supply system for an internal combustion engine, having an oil supplementing pump and an oil level sensor arranged in an oil pan for initiating the operation of the oil supplementing pump. A temperature of the oil is detected every time the engine is stopped, and this value is stored. A drop in the temperature of the oil when the engine is started is detected from the stored value of the temperature obtained when the engine was stopped. When a drop of the engine temperature is larger than a predetermined value, an oil supplementing operation is carried out.
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Citations
10 Claims
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1. A system for supplying a lubrication oil in an internal combustion engine, comprising:
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an oil pan mounted to the bottom of the internal combustion engine and storing an amount of lubrication oil therein; first sensor means for detecting a level of oil stored in the oil pan; second sensor means for detecting temperature parameters of the internal combustion engine; means for storing the value of a temperature detected by the second sensor means when operation of the engine is terminated, said storing means storing the temperature until operation of the engine is resumed; means for determining a recovered state of the oil in the oil pan, based on the difference between the temperature stored in the storing means and a temperature as detected by the second sensor means when the engine is started and a correlation between the temperature difference and an amount of oil recovered in the oil pan; and oil supplementing means for supplementing oil in the oil pan when the oil level in the oil pan sensed by the first sensor means is lower than a predetermined value, after the oil in the oil pan has been fully recovered, as determined by the determining means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification