Internal combustion engine for portable power generating equipment
US5497735A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1994 |
| Grant date | Mar 12, 1996 |
| Priority date | — |
| Expiry date | Jun 3, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2101
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An internal combustion engine for portable power generating equipment includes a camshaft assembly having an integral oil pump at one end thereof. The camshaft, which is preferably formed of two dissimilar materials, is mounted for axial movement in response to increased oil pressure so as to provide automatic oil pressure regulation. Structure is provided for reducing engine compression at low speeds to reduce cranking resistance during starting. Speed control is provided by a stepper motor coupled through a cam to the engine throttle. The cam is shaped so as to counteract the non-linear relationship between throttle position and engine power and speed so as to provide a desired relationship between the position of the stepper motor and the engine power and speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.