Motorcycle breather valve adjustment system and method
US4869213A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1988 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Mar 28, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B75/22
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system is provided for relieving gas pressure developed in a crank case under an internal combustion engine piston as the reciprocating piston travels from top dead center toward and beyond bottom dead center, and wherein a rotary breather valve is employed. The rotary valve has a rotary sleeve rotatable within a fixed sleeve, the rotary and fixed sleeves respectively having first and second arcuate ports which come into increasing and decreasing registration in timed relation to the piston travel, such decreasing registration terminating after the piston reaches bottom dead center. Oil and air mist are discharged through the registered ports during said piston travel. In this system, a method for compensating for the replacement of a relatively smaller displacement piston chamber with a relatively larger displacement piston chamber is provided, said method including: PA0 (a) removing a first rotary sleeve from the fixed sleeve, the first sleeve provided on a first rotary valve and characterized as having an arcuate port subtending an angle .alpha..sub.1, which terminates such decreasing registration after the piston travels a distance d.sub.1 beyond bottom dead center, PA0 (b) p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.