OPTIMIZING CONTROL OF DIESEL INJECTION TIMING
A closed-loop digital system for the control of diesel engine timing has been investigated both experimentally and theoretically. The optimizing control system continuously searches for maximum brake torque (MBT) fuel injection timing, or a timing advanced or retarded a pre-determined amount from MBT. It utilizes peak seeking logic in which the injection timing is continuously dithered (alternately advanced and retarded by small amounts) and corrected in accordance with engine speed changes resulting from the dithering. Two types of optimizing control are discussed: time-based and crankangle-based. The time-based control operates at fixed dither frequency. The system used in the experimental tests was a time-based control system. With the crankangle-based control, dithering is synchronized to engine rotation. Thus, the dither frequency varies with engine speed.
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Supplemental Notes:
- ISATA 83. Volume 1. International Symposium on Automotive Technology and Automation with particular reference to Electronics and Energy Saving in the Automotive Industries: Product and Process, Cologne, 19-23 September 1983.
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Corporate Authors:
Automotive Automotion Limited
42 Lloyd Park Avenue
Croydon CRO 5SB, Surrey, EnglandFord Werke AG
, Germany -
Authors:
- KITTELSON, D B
- Pipho, M J
- Conference:
- Publication Date: 1983
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 245-272
Subject/Index Terms
- TRT Terms: Diesel engines; Digital computers; Experiments; Feedback control; Fuel injection; Loops (Control systems); Optimization; Simulation; Valve timing
- Old TRIS Terms: Digital systems; Engine timing
- Subject Areas: Safety and Human Factors;
Filing Info
- Accession Number: 00393100
- Record Type: Publication
- Source Agency: National Highway Traffic Safety Administration
- Report/Paper Numbers: Proceeding, HS-037 234, HS-037 235
- Files: HSL, USDOT
- Created Date: Mar 29 1985 12:00AM