Temperature compensated internal combustion engine ignition spark vacuum advance system
US4112891A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1976 |
| Grant date | Sep 12, 1978 |
| Priority date | — |
| Expiry date | Oct 21, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P5/106
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The ignition spark initiating mechanism of the ignition distributor is operated by a vacuum responsive device for adjusting ignition spark timing in response to engine vacuum. A temperature responsive valve located in a position at which it is exposed to engine intake air and a bleed line including a calibrated restriction are arranged in combination to expose the engine vacuum signal applied to the intake port of the vacuum actuator unit to atmosphere through the inlet and outlet ports of the temperature responsive valve. This combination operates to adjust the level of the engine vacuum applied to the vacuum responsive device proportionally with changes of engine intake air temperature in a direction toward atmosphere as the temperature of the engine intake air increases and vice versa.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.