This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Engineering C-D Ignition for Modern Engines
Annotation ability available
Sector:
Language:
English
Abstract
A new breakerless capacitor discharge ignition system has been developed by Delco-Remy Division, GMC. This unit provides important benefits to the vehicle operator, and has been designed to fit the requirements of modern gasoline engines. An extensive engine test program was conducted to establish the major design objectives. In this test program, it was found that under adverse cold starting conditions the system must produce 23-25 kv of ignition at the spark plug to insure reliable starts. Battery voltage may drop as low as 4.0 volts at this time.
It was also determined that an extremely rapid voltage rise at the spark plug is not necessarily best for smooth engine operation. A risetime of 35 microsec was chosen as a more nearly optimum choice to provide smooth engine operation and extended spark plug life. In the process of making applications for original equipment, a number of problems were encountered. Special provisions were found to be required for engine test instrumentation, and to reduce radio frequency interference to a satisfactory level. Benefits provided by this new system include the extension of spark plug life by as much as 4-5 times; improved cold starting; and the virtual elimination of traditional ignition distributor maintenance.
Recommended Content
| Ground Vehicle Standard | Discharge Forward Lighting System and Subsystems |
| Ground Vehicle Standard | External Ignition Protection of Marine Electrical Devices |
| Technical Paper | Analysis of Influence Factors for Partial Discharge Inception Voltage between Magnet-Wires on Rotating Machines |
Authors
Topic
Citation
Hetzler, L. and Kline, P., "Engineering C-D Ignition for Modern Engines," SAE Technical Paper 670116, 1967, https://doi.org/10.4271/670116.Also In
References
- Patterson D. J. “Cylinder Pressure Variations, A Fundamental Combustion Problem.” Paper 660129 presented at SAE Automotive Engineering Congress Detroit January 1966
- Norris J. C. “Delcotronic Transistor-Controlled Magnetic Pulse-Type Ignition System.” Paper 617B presented at Automotive Engineering Congress Detroit January 1963