Lubricating system for internal combustion engine

Patent 6527087 Issued on March 4, 2003. Estimated Expiration Date:

May 11, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventors

Assignee

Honda Giken Kogyo Kabushiki Kaisha

Application

No. 852670 filed on 05/11/2001

US Classes:

184/6.5, Crank-type machines184/18Cylinder lubricators

Examiners

Primary: Fenstermacher, David

Attorney, Agent or Firm

Birch, Stewart, Kolasch & Birch, LLP

Foreign Patent References

6181873 JP. 04/11/1986
2523715 JP. 10/11/1996

International Class

F01M 001/04

Foreign Application Priority Data

2000-05-11 JP

Abstract

To reduce the size and weight of an oil tank for a dry sump type lubricating system. A separate oil tank of a dry sump type lubricating system is mounted on the front surface of a front case cover constituting part of a crankcase divided into front and rear parts. An effective volume portion, in which oil supplied from the crankcase side via scavenging pumps and cooled by an oil cooler is contained, is provided in the oil tank. The bottom portion of the effective volume portion is connected to a feed pump on the crankcase side via an outlet side passage. A tank side pipe portion extending rearwardly through the oil tank is integrally provided at a portion of the oil tank higher than the oil level in the oil tank. The tank side pipe portion is connected to a crankcase side pipe portion integrally provided on an upper portion of the front case cover to form an overflow passage. The overflow passage functions as a pressure-equalization passage for equalizing the pressure in the oil tank with the pressure in the crankcase, and allows overflowed oil in the oil tank to readily flow into the crankcase through the upper portion of the front case cover.