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Four-cycle engine lubrication structure

  • US 6,202,621 B1
  • Filed: 09/09/1999
  • Issued: 03/20/2001
  • Est. Priority Date: 09/12/1998
  • Status: Expired due to Term
First Claim
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1. A four-cycle engine lubrication structure for lubricating an engine and transmission with a common lubricating oil, comprising:

  • an oil sump for lubricating oil provided at a lower part of a crank chamber of a four-cycle engine;

    a reed valve provided at an outlet of the oil sump, said reed valve being openable when pressure in the crank chamber is high; and

    an oil passage sloping upwards from the outlet of the oil sump, an outlet of the oil passage being provided above a surface level of oil accumulated within a bottom part of a transmission chamber of the transmission.

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