Method and apparatus for the automated testing of vehicle fuel evaporation control systems
US5239858A · kind A · utility
28Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1992 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Feb 20, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M25/0809
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for the testing of a vehicle fuel evaporation control system, which typically includes a fuel tank, vapor adsorption canister and purge valve, consisting of the introduction of a non-reactive gas into the control system and the subsequent monitoring of the engine exhaust during operation for presence of the gas. The operating parameters of the engine may be varied to determine parameter-associated operation of the control system. In addition, the quantity of gas admitted into the system may be compared to that exiting the exhaust to provide a quantitative measurement of the integrity of the control system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.