Engine balancer
US6286474A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2000 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | Jan 12, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B67/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An internal combustion engine comprises a crankshaft having a helical spur gear mounted for rotation therewith and a balancer. The balancer includes a balancer housing and first and second balance shafts rotatably carried in the balancer housing about laterally spaced parallel axes. A first gear is mounted on the first balance shaft and driven by the helical spur gear at a speed determined by the crankshaft. A second gear is mounted on the second balance shaft for meshing engagement with the first gear for rotation in a direction opposite to the first gear. The helical spur gear and the first and second gears have teeth yielding an involute contact ratio of approximately 3 and a total contact ratio of approximately 5 to thereby reduce gear rattle. One of the balancer gears is aluminum and the other balancer gear is grey cast iron.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.