Under the Boot: ETCO Research Takes a Look at Coil on Plug Connections
Focusing on the connection between the coil and the spark plug used in the coil on plug assemblies, this paper compares and evaluates an assortment of industry standard coil to plug connections. It applies various tests and measurements, which expose each connecting device to the same conditions, providing an, "apples to apples" comparison and use these studies to gage the connection devices performance and develop ideas for improvement. Figures illustrating distributor cap with terminal towers, electronic ignition coil pack, voltage drop fixture, 13.8 VDC regulated power supply, control box circuitry, complete voltage measurement set-up, and 2 channel 50 MHz oscilloscope are also included. The paper recommends that under these conditions, a connecting device should be retained by a physical coupling offering resistance to movement at the point of connection.
Table of Contents
- ETCO
- The Issue
- The Ignition System
- Measurements and Testing
- Resistance Measurements
- Voltage Drop Measurements
- Retention Force Measurements
- Vibration Effects on Devices
- Visual Evaluation of Sparking Events
- Review
- Summary
- Conclusion
- Figures
- Distributor with Points
- Distributor Cap with Terminal Towers
- Electronic Ignition Coil Pack
- 90° Terminal
- Straight Terminal
- Chatillon Gauges and Motion Control Equipment Used to Measure Retention Values
- Chatillon Gauges and Motion Control Equipment Used to Measure Retention Values
- COP Assembly
- COP Assembly
- Coil on Plug Connector Devices
- Figure 11
- Figure 12
- Figure 13
- Figure 14
- Figure 15
- Figure 16
- Figure 17
- Voltage Drop Fixture
- 13.8 VDC Regulated Power Supply
- Control Box Circuitry
- Control Box
- Complete Voltage Measurement Set-up
- 2 Channel 50mHZ Oscilloscope
- Figure 24
- Figure 25
- Figure 26
- Figure 27
- Figure 28
- Figure 29
- Figure 30
- Figure 31
- Figure 32
- Figure 33
- Figure 34
- Figure 35
- Figure 36
- Figure 37
- Figure 38
- Figure 39
- Figure 40
- Figure 41
- Figure 42
- Figure 43
- Graphs
- Resistance Measurements
- Tables
- Connecting Device Measurements
