| Title | Closed Loop Control of Automotive Engines |
|---|---|
| Record ID | 49034 |
| Personal Name Creator |
Powell, J. David; Glaser, Itshak; Randall, Kent; Hosey, Rick |
| Source | 316p. in various pagings |
| Corporate Creator | Stanford University |
| Corporate Contributor |
John A. Volpe National Transportation Systems Center (U.S.); United States. Department of Transportation. National Highway Traffic Safety Administration |
| Publisher | United States. Department of Transportation. National Highway Traffic Safety Administration |
| Publication Date | 19811201 |
| Language | English |
| Abstract | Internal combustion engine economy and emissions are known to be sensitive to changes in engine control variables. Two of the most important variables are fuel/air ratio (f/a) and spark advance. These variables are affected by environmental changes, manufacturing tolerances, and time degradation. The combined effect of all these changes can cause as much as a 15% loss in economy and a 30% increase in emissions. This research concerns the application of optimization theory to develop control laws for use in closed loop control strategies to minimize the effect of the variables discussed above. The report describes the automated dynamometer facility developed for the acquisition of engine mapping data. This data was used to develop analytical functions describing the fuel consumption and emissions at each of 10 torque/RPM points. The functions were used by an optimization procedure to arrive at control strategies and driving cycle predictions of fuel consumption and emissions. The optimum schedules were then used to determine a closed-loop control strategy. |
| Rosap ID | dot:10516 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/10516 |
| TRT Terms | Air quality management; Exhaust gases; Internal combustion engines; Control loops; Control systems; Feedback control; Automatic control; Optimization; Computer programs; Electronic control; Fuel consumption; Vehicle power plants |
| Classification | NTL - ENERGY AND ENVIRONMENT - ENERGY AND ENVIRONMENT; NTL - ENERGY AND ENVIRONMENT - Air Quality; NTL - SAFETY AND SECURITY - Vehicle Design |
| Geographical Coverage |
United States |
| Contract Number | DOT-TSC-1466 |
| Report Number | DOT-TSC-NHTSA-81-12; HS-805 874 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/49000/49000/49034/DOT-TSC-NHTSA-81-12.pdf |
| Format | |
| Database | NTL Digital Repository |