Lubrication system for a four-stroke engine
US8225774B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2009 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | Aug 4, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C3/14
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A lubrication system for a four stroke engine including an oil pan for storing lubrication oil; a crankcase, wherein a crankshaft is disposed, which crankshaft has a balance weight and is coupled with a piston of a cylinder; a gear assembly room; a rocker-arm chamber; and a gas-oil separator for separating gas and oil from a mix of gas and oil; wherein the oil pan communicates with the crankcase by an oil suction passage, in which a first check valve is disposed; the crankcase communicates with the gear assembly room by a first oil delivery passage; the gear assembly room communicates with the rocker-arm chamber by a second oil delivery passage, and the gear assembly room communicates with the oil pan by a third oil delivery passage; the rocker-arm chamber communicates with the crankcase by a first oil return passage having a second check valve therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.