Oil supply device for engine
First Claim
1. An oil supply device for an engine for supplying oil to a lubrication system portion and a cooling system portion of an engine, comprising:
- a first oil suction passage in communication with an oil reservoir which reserves oil;
a second oil suction passage in communication with the oil reservoir;
a first pump for sucking oil from the first oil suction passage by means of rotation of crankshaft of the engine and for discharging the sucked oil;
a second pump arranged in series with the first pump for controlling switching On-Off operation, the second pump configured to be supplied with oil discharged from the first pump and introduced from the second oil suction passage for sucking and discharging oil from at least one of the first pump and the second oil suction passage;
a check valve for blocking oil circulation from the second pump to the first pump and from the second oil suction passage to the first pump;
a first oil passage diverged between the check valve and the first pump and extended to the lubrication system portion;
a second oil passage extended from the second pump to the cooling system portion;
a third oil passage for establishing communication between the first oil passage and the second oil passage; and
a supply volume control means for varying oil supply volume to the lubrication system portion, to the cooling system portion, or to the lubrication system portion and the cooling system portion in accordance with a change in at least one of an engine oil temperature, an engine rotation speed, and an engine load.
1 Assignment
0 Petitions
Accused Products
Abstract
An oil supply device for an engine includes a first oil suction passage, a second oil suction passage, a first pump for sucking and discharging oil from the first oil suction passage, a second pump arranged in series with the first pump, the second pump for sucking and discharging oil from at least one of the first pump and the second oil suction passage, a check valve for blocking oil circulation, a first oil passage, a second oil passage, a third oil passage for establishing communication between the first oil passage and the second oil passage, and a supply volume control device for varying oil supply volume to a lubrication system portion, to a cooling system portion, or to the lubrication system portion and the cooling system portion in accordance with a change in at least one of an engine oil temperature, an engine rotation speed, and an engine load.
54 Citations
20 Claims
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1. An oil supply device for an engine for supplying oil to a lubrication system portion and a cooling system portion of an engine, comprising:
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a first oil suction passage in communication with an oil reservoir which reserves oil;
a second oil suction passage in communication with the oil reservoir;
a first pump for sucking oil from the first oil suction passage by means of rotation of crankshaft of the engine and for discharging the sucked oil;
a second pump arranged in series with the first pump for controlling switching On-Off operation, the second pump configured to be supplied with oil discharged from the first pump and introduced from the second oil suction passage for sucking and discharging oil from at least one of the first pump and the second oil suction passage;
a check valve for blocking oil circulation from the second pump to the first pump and from the second oil suction passage to the first pump;
a first oil passage diverged between the check valve and the first pump and extended to the lubrication system portion;
a second oil passage extended from the second pump to the cooling system portion;
a third oil passage for establishing communication between the first oil passage and the second oil passage; and
a supply volume control means for varying oil supply volume to the lubrication system portion, to the cooling system portion, or to the lubrication system portion and the cooling system portion in accordance with a change in at least one of an engine oil temperature, an engine rotation speed, and an engine load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification