Lubricating system of engine
First Claim
1. A lubricating system of an engine in which plural cylinders are provided so as to be arranged in a direction of a crank shaft, an oil pan is mounted to an oil pan mounting portion formed in a lower surface of a crank case, and a whole of a crank chamber in the crank case is partitioned into plural individual crank chambers by a partition wall so as to correspond to the cylinders in which the crank chamber has a bottom wall to isolate the crank chamber from the oil pan, comprising:
- an oil drain port formed in the bottom wall of each of the individual crank chambers respectively;
a scavenging oil pump pumping out oil to an oil reservoir portion which is isolated from each of the individual crank chambers; and
an oil collecting chamber communicating with a suction portion of the scavenging oil pump, whereinthe oil collecting chamber is positioned under the bottom wall of the crank chamber, and the oil drain ports are communicated with the oil collecting chamber.
2 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a dry sump type or semidry sump type lubricating system of an engine in which a lubricating method executes an operation while keeping an inner side of a crank chamber in a dry state. An oil drain port is formed in a bottom surface of each of individual crank chambers partitioned into the cylinders, and a scavenging oil pump is provided so as to suck out oil to an oil reservoir portion which is isolated from each of the individual crank chambers. An oil collecting chamber communicating with a suction portion of the scavenging oil pump is provided in a lower side of the bottom wall in the crank chamber, and the oil drain port is communicated with the oil collecting chamber.
30 Citations
14 Claims
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1. A lubricating system of an engine in which plural cylinders are provided so as to be arranged in a direction of a crank shaft, an oil pan is mounted to an oil pan mounting portion formed in a lower surface of a crank case, and a whole of a crank chamber in the crank case is partitioned into plural individual crank chambers by a partition wall so as to correspond to the cylinders in which the crank chamber has a bottom wall to isolate the crank chamber from the oil pan, comprising:
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an oil drain port formed in the bottom wall of each of the individual crank chambers respectively; a scavenging oil pump pumping out oil to an oil reservoir portion which is isolated from each of the individual crank chambers; and an oil collecting chamber communicating with a suction portion of the scavenging oil pump, wherein the oil collecting chamber is positioned under the bottom wall of the crank chamber, and the oil drain ports are communicated with the oil collecting chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A semidry sump type lubricating system of an engine in which a lower portion of a transmission room of a crank case is formed as an oil reservoir portion isolated from a crank chamber, comprising:
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an oil collecting chamber positioned under a bottom wall of the crank chamber; a scavenging oil pump pumping out oil from the oil collecting chamber to the oil reservoir portion; a feed oil pump for supplying the oil from the oil reservoir portion to each of lubricating positions of the engine; an oil collecting passage provided under the bottom wall so as to flow the oil from a drain port of the crank chamber to the oil collecting chamber, and a regulating hole provided to the oil collecting passage or the bottom wall so as to communicate the oil collecting chamber with the oil reservoir portion, wherein a cross sectional area of the regulating hole is set such that an amount of the oil flowing to the oil collecting chamber from the oil reservoir portion through the regulating hole and the oil collecting passage becomes smaller than an amount of the oil pumped out to the oil reservoir portion from the oil collecting chamber side by the scavenging oil pump. - View Dependent Claims (12, 13, 14)
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Specification